* [PATCH v2 0/5] Add support for Axis, ARTPEC-8 PCIe driver
[not found] <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p6>
@ 2022-06-03 1:54 ` Wangseok Lee
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p5>
` (3 more replies)
2022-06-03 2:31 ` [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy Wangseok Lee
2022-06-08 4:14 ` [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver Wangseok Lee
2 siblings, 4 replies; 18+ messages in thread
From: Wangseok Lee @ 2022-06-03 1:54 UTC (permalink / raw)
To: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
This v2 patchset is improvement several review comments received from patchset v1.
Main changes since v1 [1]:
-'make dt_binding_check' result improvement
-Add the missing property list
-improvement review comment of Krzysztof on driver code
-change folder name of phy driver to axis from artpec
[1] https://lore.kernel.org/lkml/20220328014430epcms2p7063834feb0abdf2f38a62723c96c9ff1@epcms2p7/
--------------------------------------------------------------
This series patches include newly PCIe support for Axis ARTPEC-8 SoC.
ARTPEC-8 is the SoC platform of Axis Communications.
PCIe controller driver and phy driver have been newly added.
There is also a new MAINTAINER in the addition of phy driver.
PCIe controller is designed based on Design-Ware PCIe controller IP
and PCIe phy is desinged based on SAMSUNG PHY IP.
It also includes modifications to the Design-Ware controller driver to
run the 64bit-based ARTPEC-8 PCIe controller driver.
It consists of 6 patches in total.
This series has been tested on AXIS SW bring-up board
with ARTPEC-8 chipset.
--------------------------------------------------------------
Wangseok Lee (5):
dt-bindings: pci: Add ARTPEC-8 PCIe controller
dt-bindings: phy: Add ARTPEC-8 PCIe phy
PCI: axis: Add ARTPEC-8 PCIe controller driver
phy: Add ARTPEC-8 PCIe PHY driver
MAINTAINERS: Add maintainer for Axis ARTPEC-8 PCIe PHY driver
.../bindings/pci/axis,artpec8-pcie-ep.yaml | 108 +++
.../devicetree/bindings/pci/axis,artpec8-pcie.yaml | 123 +++
.../bindings/phy/axis,artpec8-pcie-phy.yaml | 70 ++
MAINTAINERS | 2 +
drivers/pci/controller/dwc/Kconfig | 31 +
drivers/pci/controller/dwc/Makefile | 1 +
drivers/pci/controller/dwc/pcie-artpec8.c | 864 +++++++++++++++++++++
drivers/phy/Kconfig | 1 +
drivers/phy/Makefile | 1 +
drivers/phy/axis/Kconfig | 9 +
drivers/phy/axis/Makefile | 2 +
drivers/phy/axis/phy-artpec8-pcie.c | 806 +++++++++++++++++++
12 files changed, 2018 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
create mode 100644 Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
create mode 100644 drivers/pci/controller/dwc/pcie-artpec8.c
create mode 100644 drivers/phy/axis/Kconfig
create mode 100644 drivers/phy/axis/Makefile
create mode 100644 drivers/phy/axis/phy-artpec8-pcie.c
--
2.9.5
^ permalink raw reply [flat|nested] 18+ messages in thread
* [PATCH v2 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p5>
@ 2022-06-03 2:23 ` Wangseok Lee
2022-06-06 10:12 ` Krzysztof Kozlowski
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p8>
2022-06-08 3:30 ` [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy Wangseok Lee
1 sibling, 2 replies; 18+ messages in thread
From: Wangseok Lee @ 2022-06-03 2:23 UTC (permalink / raw)
To: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
Add description to support Axis, ARTPEC-8 SoC.
ARTPEC-8 is the SoC platform of Axis Communications
and PCIe controller is designed based on Design-Ware PCIe controller.
changes since v1 :
-'make dt_binding_check' result improvement
-Add the missing property list
-Align the indentation of continued lines/entries
Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
---
.../bindings/pci/axis,artpec8-pcie-ep.yaml | 108 ++++++++++++++++++
.../devicetree/bindings/pci/axis,artpec8-pcie.yaml | 123 +++++++++++++++++++++
2 files changed, 231 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
new file mode 100644
index 0000000..3512e38
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
@@ -0,0 +1,108 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/axis,artpec8-pcie-ep.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARTPEC-8 SoC PCIe Controller Device Tree Bindings
+
+maintainers:
+ - Jesper Nilsson <jesper.nilsson@axis.com>
+
+description: |+
+ This PCIe end-point controller is based on the Synopsys DesignWare PCIe IP
+ and thus inherits all the common properties defined in snps,dw-pcie-ep.yaml.
+
+allOf:
+ - $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
+
+properties:
+ compatible:
+ const: axis,artpec8-pcie-ep
+
+ reg:
+ items:
+ - description: Data Bus Interface (DBI) registers.
+ - description: Data Bus Interface (DBI2) registers.
+ - description: PCIe address space region.
+
+ reg-names:
+ items:
+ - const: dbi
+ - const: dbi2
+ - const: addr_space
+
+ interrupts:
+ maxItems: 1
+
+ interrupts-names:
+ items:
+ - const: intr
+
+ clocks:
+ items:
+ - description: PIPE clock, used by the controller to clock the PIPE
+ - description: PCIe dbi clock, ungated version
+ - description: PCIe master clock, ungated version
+ - description: PCIe slave clock, ungated version
+
+ clock-names:
+ items:
+ - const: pipe_clk
+ - const: dbi_clk
+ - const: mstr_clk
+ - const: slv_clk
+
+ phys:
+ maxItems: 1
+
+ phy-names:
+ items:
+ - const: pcie_phy
+
+ num-lanes:
+ const: 2
+
+required:
+ - reg
+ - reg-names
+ - interrupts
+ - interrupt-names
+ - clocks
+ - clock-names
+ - phys
+ - num-lanes
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ artpec8 {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ pcie_ep: pcie-ep@17200000 {
+ compatible = "axis,artpec8-pcie-ep";
+ reg = <0x0 0x17200000 0x0 0x1000>,
+ <0x0 0x17201000 0x0 0x1000>,
+ <0x2 0x00000000 0x6 0x00000000>;
+ reg-names = "dbi", "dbi2", "addr_space";
+ #interrupt-cells = <1>;
+ interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "intr";
+ clocks = <&clock_cmu_fsys 39>,
+ <&clock_cmu_fsys 38>,
+ <&clock_cmu_fsys 37>,
+ <&clock_cmu_fsys 36>;
+ clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
+ phys = <&pcie_phy>;
+ phy-names = "pcie_phy";
+ num-lanes = <2>;
+ bus-range = <0x00 0xff>;
+ num-ib-windows = <16>;
+ num-ob-windows = <16>;
+ };
+ };
+...
diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
new file mode 100644
index 0000000..945a061
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
@@ -0,0 +1,123 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/axis,artpec8-pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Artpec-8 SoC PCIe Controller Device Tree Bindings
+
+maintainers:
+ - Jesper Nilsson <jesper.nilsson@axis.com>
+
+description: |+
+ This PCIe host controller is based on the Synopsys DesignWare PCIe IP
+ and thus inherits all the common properties defined in snps,dw-pcie.yaml.
+
+allOf:
+ - $ref: /schemas/pci/snps,dw-pcie.yaml#
+
+properties:
+ compatible:
+ const: axis,artpec8-pcie
+
+ reg:
+ items:
+ - description: Data Bus Interface (DBI) registers.
+ - description: External Local Bus interface (ELBI) registers.
+ - description: PCIe configuration space region.
+
+ reg-names:
+ items:
+ - const: dbi
+ - const: elbi
+ - const: config
+
+ device_type:
+ items:
+ - const: pci
+
+ ranges:
+ maxItems: 2
+
+ num-lanes:
+ const: 2
+
+ interrupts:
+ maxItems: 1
+
+ interrupts-names:
+ items:
+ - const: intr
+
+ clocks:
+ items:
+ - description: PIPE clock, used by the controller to clock the PIPE
+ - description: PCIe dbi clock, ungated version
+ - description: PCIe master clock, ungated version
+ - description: PCIe slave clock, ungated version
+
+ clock-names:
+ items:
+ - const: pipe_clk
+ - const: dbi_clk
+ - const: mstr_clk
+ - const: slv_clk
+
+ phys:
+ maxItems: 1
+
+ phy-names:
+ items:
+ - const: pcie_phy
+
+required:
+ - reg
+ - reg-names
+ - device_type
+ - ranges
+ - num-lanes
+ - interrupts
+ - interrupt-names
+ - clocks
+ - clock-names
+ - phys
+ - phy-names
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ artpec8 {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ pcie: pcie@17200000 {
+ compatible = "axis,artpec8-pcie";
+ reg = <0x0 0x17200000 0x0 0x1000>,
+ <0x0 0x16ca0000 0x0 0x2000>,
+ <0x7 0x0001e000 0x0 0x2000>;
+ reg-names = "dbi", "elbi", "config";
+ #address-cells = <3>;
+ #size-cells = <2>;
+ device_type = "pci";
+ ranges = </* non-prefetchable memory */
+ 0x83000000 0x0 0x0000000 0x2 0x00000000 0x5 0x00000000
+ /* downstream I/O */
+ 0x81000000 0x0 0x0000000 0x7 0x00000000 0x0 0x00010000>;
+ num-lanes = <2>;
+ bus-range = <0x00 0xff>;
+ interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
+ interrupt-names = "intr";
+ #interrupt-cells = <1>;
+ clocks = <&cmu_fsys 39>,
+ <&cmu_fsys 38>,
+ <&cmu_fsys 37>,
+ <&cmu_fsys 36>;
+ clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
+ phys = <&pcie_phy>;
+ phy-names = "pcie_phy";
+ };
+ };
+...
--
2.9.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy
[not found] <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p6>
2022-06-03 1:54 ` [PATCH v2 0/5] Add support for Axis, ARTPEC-8 PCIe driver Wangseok Lee
@ 2022-06-03 2:31 ` Wangseok Lee
2022-06-06 10:14 ` Krzysztof Kozlowski
2022-06-08 4:14 ` [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver Wangseok Lee
2 siblings, 1 reply; 18+ messages in thread
From: Wangseok Lee @ 2022-06-03 2:31 UTC (permalink / raw)
To: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
Add description to support Axis, ARTPEC-8 SoC.
ARTPEC-8 is the SoC platform of Axis Communications
and PCIe phy is designed based on SAMSUNG PHY.
changes since v1 :
-'make dt_binding_check' result improvement
-Add the missing property list
-Align the indentation of continued lines/entries
Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
---
.../bindings/phy/axis,artpec8-pcie-phy.yaml | 70 ++++++++++++++++++++++
1 file changed, 70 insertions(+)
create mode 100644 Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
diff --git a/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
new file mode 100644
index 0000000..ab9766f
--- /dev/null
+++ b/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
@@ -0,0 +1,70 @@
+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/phy/axis,artpec8-pcie-phy.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: ARTPEC-8 SoC PCIe PHY Device Tree Bindings
+
+maintainers:
+ - Jesper Nilsson <jesper.nilsson@axis.com>
+
+properties:
+ compatible:
+ const: axis,artpec8-pcie-phy
+
+ reg:
+ items:
+ - description: PHY registers.
+ - description: PHY coding sublayer registers.
+
+ reg-names:
+ items:
+ - const: phy
+ - const: pcs
+
+ "#phy-cells":
+ const: 0
+
+ clocks:
+ items:
+ - description: PCIe PHY reference clock
+
+ clock-names:
+ items:
+ - const: ref_clk
+
+ num-lanes:
+ const: 2
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - "#phy-cells"
+ - clocks
+ - clock-names
+ - num-lanes
+
+additionalProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/irq.h>
+ #include <dt-bindings/interrupt-controller/arm-gic.h>
+
+ artpec8 {
+ #address-cells = <2>;
+ #size-cells = <2>;
+ pcie_phy: pcie-phy@16c80000 {
+ compatible = "axis,artpec8-pcie-phy";
+ reg = <0x0 0x16c80000 0x0 0x2000>,
+ <0x0 0x16c90000 0x0 0x1000>;
+ reg-names = "phy", "pcs";
+ #phy-cells = <0>;
+ clocks = <&clock_cmu_fsys 53>;
+ clock-names = "ref_clk";
+ num-lanes = <2>;
+ };
+ };
+...
--
2.9.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p2>
@ 2022-06-03 2:34 ` Wangseok Lee
2022-06-03 16:03 ` Bjorn Helgaas
2022-06-06 10:23 ` Krzysztof Kozlowski
0 siblings, 2 replies; 18+ messages in thread
From: Wangseok Lee @ 2022-06-03 2:34 UTC (permalink / raw)
To: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
Add support Axis, ARTPEC-8 SoC.
ARTPEC-8 is the SoC platform of Axis Communications.
This is based on arm64 and support GEN4 & 2lane.
This PCIe controller is based on DesignWare Hardware core
and uses DesignWare core functions to implement the driver.
changes since v1 :
improvement review comment of Krzysztof on driver code.
-debug messages for probe or other functions.
-Inconsistent coding style (different indentation in structure members).
-Inconsistent code (artpec8_pcie_get_subsystem_resources() gets device
from pdev and from pci so you have two same pointers;
or artpec8_pcie_get_ep_mem_resources() stores dev
as local variable but uses instead pdev->dev).
-Not using devm_platform_ioremap_resource().
-Printing messages in interrupt handlers.
-Several local/static structures or array are not const.
Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
---
drivers/pci/controller/dwc/Kconfig | 31 ++
drivers/pci/controller/dwc/Makefile | 1 +
drivers/pci/controller/dwc/pcie-artpec8.c | 864 ++++++++++++++++++++++++++++++
3 files changed, 896 insertions(+)
create mode 100644 drivers/pci/controller/dwc/pcie-artpec8.c
diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
index 62ce3ab..4aa6da8 100644
--- a/drivers/pci/controller/dwc/Kconfig
+++ b/drivers/pci/controller/dwc/Kconfig
@@ -222,6 +222,37 @@ config PCIE_ARTPEC6_EP
Enables support for the PCIe controller in the ARTPEC-6 SoC to work in
endpoint mode. This uses the DesignWare core.
+config PCIE_ARTPEC8
+ bool "Axis ARTPEC-8 PCIe controller"
+
+config PCIE_ARTPEC8_HOST
+ bool "Axis ARTPEC-8 PCIe controller Host Mode"
+ depends on ARCH_ARTPEC
+ depends on PCI_MSI_IRQ_DOMAIN
+ depends on PCI_ENDPOINT
+ select PCI_EPF_TEST
+ select PCIE_DW_HOST
+ select PCIE_ARTPEC8
+ help
+ Say 'Y' here to enable support for the PCIe controller in the
+ ARTPEC-8 SoC to work in host mode.
+ This PCIe controller is based on DesignWare Hardware core.
+ And uses DesignWare core functions to implement the driver.
+
+config PCIE_ARTPEC8_EP
+ bool "Axis ARTPEC-8 PCIe controller Endpoint Mode"
+ depends on ARCH_ARTPEC
+ depends on PCI_ENDPOINT
+ depends on PCI_ENDPOINT_CONFIGFS
+ select PCI_EPF_TEST
+ select PCIE_DW_EP
+ select PCIE_ARTPEC8
+ help
+ Say 'Y' here to enable support for the PCIe controller in the
+ ARTPEC-8 SoC to work in endpoint mode.
+ This PCIe controller is based on DesignWare Hardware core.
+ And uses DesignWare core functions to implement the driver.
+
config PCIE_ROCKCHIP_DW_HOST
bool "Rockchip DesignWare PCIe controller"
select PCIE_DW
diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
index 8ba7b67..b361022 100644
--- a/drivers/pci/controller/dwc/Makefile
+++ b/drivers/pci/controller/dwc/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o
+obj-$(CONFIG_PCIE_ARTPEC8) += pcie-artpec8.o
# The following drivers are for devices that use the generic ACPI
# pci_root.c driver but don't support standard ECAM config access.
diff --git a/drivers/pci/controller/dwc/pcie-artpec8.c b/drivers/pci/controller/dwc/pcie-artpec8.c
new file mode 100644
index 0000000..d9ae9bf
--- /dev/null
+++ b/drivers/pci/controller/dwc/pcie-artpec8.c
@@ -0,0 +1,864 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PCIe controller driver for Axis ARTPEC-8 SoC
+ *
+ * Copyright (C) 2019 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Jaeho Cho <jaeho79.cho@samsung.com>
+ * This file is based on driver/pci/controller/dwc/pci-exynos.c
+ */
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_device.h>
+#include <linux/regmap.h>
+#include <linux/resource.h>
+#include <linux/types.h>
+#include <linux/phy/phy.h>
+
+#include "pcie-designware.h"
+
+#define to_artpec8_pcie(x) dev_get_drvdata((x)->dev)
+
+/* Gen3 Control Register */
+#define PCIE_GEN3_RELATED_OFF 0x890
+/* Disables equilzation feature */
+#define PCIE_GEN3_EQUALIZATION_DISABLE (0x1 << 16)
+#define PCIE_GEN3_EQ_PHASE_2_3 (0x1 << 9)
+#define PCIE_GEN3_RXEQ_PH01_EN (0x1 << 12)
+#define PCIE_GEN3_RXEQ_RGRDLESS_RXTS (0x1 << 13)
+
+#define FAST_LINK_MODE (7)
+
+/* PCIe ELBI registers */
+#define PCIE_IRQ0_STS 0x000
+#define PCIE_IRQ1_STS 0x004
+#define PCIE_IRQ2_STS 0x008
+#define PCIE_IRQ5_STS 0x00C
+#define PCIE_IRQ0_EN 0x010
+#define PCIE_IRQ1_EN 0x014
+#define PCIE_IRQ2_EN 0x018
+#define PCIE_IRQ5_EN 0x01C
+#define IRQ_MSI_ENABLE BIT(20)
+#define PCIE_APP_LTSSM_ENABLE 0x054
+#define PCIE_ELBI_LTSSM_ENABLE 0x1
+#define PCIE_ELBI_CXPL_DEBUG_00_31 0x2C8
+#define PCIE_ELBI_CXPL_DEBUG_32_63 0x2CC
+#define PCIE_ELBI_SMLH_LINK_UP BIT(4)
+#define PCIE_ARTPEC8_DEVICE_TYPE 0x080
+#define DEVICE_TYPE_EP 0x0
+#define DEVICE_TYPE_LEG_EP 0x1
+#define DEVICE_TYPE_RC 0x4
+#define PCIE_ELBI_SLV_AWMISC 0x828
+#define PCIE_ELBI_SLV_ARMISC 0x820
+#define PCIE_ELBI_SLV_DBI_ENABLE BIT(21)
+#define LTSSM_STATE_MASK 0x3f
+#define LTSSM_STATE_L0 0x11
+
+/* FSYS SYSREG Offsets */
+#define FSYS_PCIE_CON 0x424
+#define PCIE_PERSTN BIT(5)
+#define FSYS_PCIE_DBI_ADDR_CON 0x428
+#define FSYS_PCIE_DBI_ADDR_OVR_CDM 0x00
+#define FSYS_PCIE_DBI_ADDR_OVR_SHADOW 0x12
+#define FSYS_PCIE_DBI_ADDR_OVR_ATU 0x36
+
+/* PMU SYSCON Offsets */
+#define PMU_SYSCON_PCIE_ISOLATION 0x3200
+
+/* BUS P/S SYSCON Offsets */
+#define BUS_SYSCON_BUS_PATH_ENABLE 0x0
+
+int artpec8_pcie_dbi_addr_con[] = {
+ FSYS_PCIE_DBI_ADDR_CON
+};
+
+struct artpec8_pcie {
+ struct dw_pcie *pci;
+ struct clk *pipe_clk;
+ struct clk *dbi_clk;
+ struct clk *mstr_clk;
+ struct clk *slv_clk;
+ const struct artpec8_pcie_pdata *pdata;
+ void __iomem *elbi_base;
+ struct regmap *sysreg;
+ struct regmap *pmu_syscon;
+ struct regmap *bus_s_syscon;
+ struct regmap *bus_p_syscon;
+ enum dw_pcie_device_mode mode;
+ int link_id;
+ /* For Generic PHY Framework */
+ struct phy *phy;
+};
+
+struct artpec8_pcie_res_ops {
+ int (*get_mem_resources)(struct platform_device *pdev,
+ struct artpec8_pcie *artpec8_ctrl);
+ int (*get_clk_resources)(struct platform_device *pdev,
+ struct artpec8_pcie *artpec8_ctrl);
+ int (*init_clk_resources)(struct artpec8_pcie *artpec8_ctrl);
+ void (*deinit_clk_resources)(struct artpec8_pcie *artpec8_ctrl);
+};
+
+struct artpec8_pcie_pdata {
+ const struct dw_pcie_ops *dwc_ops;
+ const struct dw_pcie_host_ops *host_ops;
+ const struct artpec8_pcie_res_ops *res_ops;
+ enum dw_pcie_device_mode mode;
+};
+
+enum artpec8_pcie_isolation {
+ PCIE_CLEAR_ISOLATION = 0,
+ PCIE_SET_ISOLATION = 1
+};
+
+enum artpec8_pcie_reg_bit {
+ PCIE_REG_BIT_LOW = 0,
+ PCIE_REG_BIT_HIGH = 1
+};
+
+static void artpec8_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
+ u32 reg, size_t size, u32 val);
+static u32 artpec8_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
+ u32 reg, size_t size);
+static void artpec8_pcie_writel(void __iomem *base, u32 val, u32 reg);
+
+static int artpec8_pcie_get_subsystem_resources(struct platform_device *pdev,
+ struct artpec8_pcie *artpec8_ctrl)
+{
+ struct device *dev = &pdev->dev;
+
+ /* External Local Bus interface(ELBI) Register */
+ artpec8_ctrl->elbi_base = devm_platform_ioremap_resource_byname(pdev, "elbi");
+ if (IS_ERR(artpec8_ctrl->elbi_base)) {
+ dev_err(dev, "failed to map elbi_base\n");
+ return PTR_ERR(artpec8_ctrl->elbi_base);
+ }
+
+ /* fsys sysreg regmap handle */
+ artpec8_ctrl->sysreg =
+ syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,fsys-sysreg");
+ if (IS_ERR(artpec8_ctrl->sysreg)) {
+ dev_err(dev, "fsys sysreg regmap lookup failed.\n");
+ return PTR_ERR(artpec8_ctrl->sysreg);
+ }
+
+ /* pmu syscon regmap handle */
+ artpec8_ctrl->pmu_syscon = syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,syscon-phandle");
+ if (IS_ERR(artpec8_ctrl->pmu_syscon)) {
+ dev_err(dev, "pmu syscon regmap lookup failed.\n");
+ return PTR_ERR(artpec8_ctrl->pmu_syscon);
+ }
+
+ /* bus s syscon regmap handle */
+ artpec8_ctrl->bus_s_syscon =
+ syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,syscon-bus-s-fsys");
+ if (IS_ERR(artpec8_ctrl->bus_s_syscon)) {
+ dev_err(dev, "bus_s_syscon regmap lookup failed.\n");
+ return PTR_ERR(artpec8_ctrl->bus_s_syscon);
+ }
+
+ /* bus p syscon regmap handle */
+ artpec8_ctrl->bus_p_syscon =
+ syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,syscon-bus-p-fsys");
+ if (IS_ERR(artpec8_ctrl->bus_p_syscon)) {
+ dev_err(dev, "bus_p_syscon regmap lookup failed.\n");
+ return PTR_ERR(artpec8_ctrl->bus_p_syscon);
+ }
+
+ return 0;
+}
+
+static int artpec8_pcie_get_rc_mem_resources(struct platform_device *pdev,
+ struct artpec8_pcie *artpec8_ctrl)
+{
+ struct dw_pcie *pci = artpec8_ctrl->pci;
+
+ /* Data Bus Interface(DBI) Register */
+ pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
+ if (IS_ERR(pci->dbi_base))
+ return PTR_ERR(pci->dbi_base);
+
+ return 0;
+}
+
+static int artpec8_pcie_get_ep_mem_resources(struct platform_device *pdev,
+ struct artpec8_pcie *artpec8_ctrl)
+{
+ struct dw_pcie_ep *ep;
+ struct dw_pcie *pci = artpec8_ctrl->pci;
+ struct device *dev = &pdev->dev;
+ struct resource *res;
+
+ ep = &pci->ep;
+
+ pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
+ if (IS_ERR(pci->dbi_base)) {
+ dev_err(dev, "failed to map ep_dbics\n");
+ return -ENOMEM;
+ }
+
+ pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
+ if (IS_ERR(pci->dbi_base2)) {
+ dev_err(dev, "failed to map ep_dbics2\n");
+ return -ENOMEM;
+ }
+
+ res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
+ if (!res)
+ return -EINVAL;
+ ep->phys_base = res->start;
+ ep->addr_size = resource_size(res);
+
+ return 0;
+}
+
+static int artpec8_pcie_get_clk_resources(struct platform_device *pdev,
+ struct artpec8_pcie *artpec8_ctrl)
+{
+ struct device *dev = &pdev->dev;
+
+ artpec8_ctrl->pipe_clk = devm_clk_get(dev, "pipe_clk");
+ if (IS_ERR(artpec8_ctrl->pipe_clk)) {
+ dev_err(dev, "couldn't get pipe clock\n");
+ return -EINVAL;
+ }
+
+ artpec8_ctrl->dbi_clk = devm_clk_get(dev, "dbi_clk");
+ if (IS_ERR(artpec8_ctrl->dbi_clk)) {
+ dev_info(dev, "couldn't get dbi clk\n");
+ return -EINVAL;
+ }
+
+ artpec8_ctrl->slv_clk = devm_clk_get(dev, "slv_clk");
+ if (IS_ERR(artpec8_ctrl->slv_clk)) {
+ dev_err(dev, "couldn't get slave clock\n");
+ return -EINVAL;
+ }
+
+ artpec8_ctrl->mstr_clk = devm_clk_get(dev, "mstr_clk");
+ if (IS_ERR(artpec8_ctrl->mstr_clk)) {
+ dev_info(dev, "couldn't get master clk\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int artpec8_pcie_init_clk_resources(struct artpec8_pcie *artpec8_ctrl)
+{
+ clk_prepare_enable(artpec8_ctrl->pipe_clk);
+ clk_prepare_enable(artpec8_ctrl->dbi_clk);
+ clk_prepare_enable(artpec8_ctrl->mstr_clk);
+ clk_prepare_enable(artpec8_ctrl->slv_clk);
+
+ return 0;
+}
+
+static void artpec8_pcie_deinit_clk_resources(struct artpec8_pcie *artpec8_ctrl)
+{
+ clk_disable_unprepare(artpec8_ctrl->slv_clk);
+ clk_disable_unprepare(artpec8_ctrl->mstr_clk);
+ clk_disable_unprepare(artpec8_ctrl->dbi_clk);
+ clk_disable_unprepare(artpec8_ctrl->pipe_clk);
+}
+
+static const struct artpec8_pcie_res_ops artpec8_pcie_rc_res_ops = {
+ .get_mem_resources = artpec8_pcie_get_rc_mem_resources,
+ .get_clk_resources = artpec8_pcie_get_clk_resources,
+ .init_clk_resources = artpec8_pcie_init_clk_resources,
+ .deinit_clk_resources = artpec8_pcie_deinit_clk_resources,
+};
+
+static const struct artpec8_pcie_res_ops artpec8_pcie_ep_res_ops = {
+ .get_mem_resources = artpec8_pcie_get_ep_mem_resources,
+ .get_clk_resources = artpec8_pcie_get_clk_resources,
+ .init_clk_resources = artpec8_pcie_init_clk_resources,
+ .deinit_clk_resources = artpec8_pcie_deinit_clk_resources,
+};
+
+static void artpec8_pcie_writel(void __iomem *base, u32 val, u32 reg)
+{
+ writel(val, base + reg);
+}
+
+static u32 artpec8_pcie_readl(void __iomem *base, u32 reg)
+{
+ return readl(base + reg);
+}
+
+static int artpec8_pcie_config_phy_power_isolation(struct dw_pcie *pci,
+ enum artpec8_pcie_reg_bit val)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ int ret;
+
+ ret = regmap_write(artpec8_ctrl->pmu_syscon, PMU_SYSCON_PCIE_ISOLATION,
+ val);
+
+ return ret;
+}
+
+static int artpec8_pcie_config_bus_enable(struct dw_pcie *pci,
+ enum artpec8_pcie_reg_bit val)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ int ret;
+
+ ret = regmap_write(artpec8_ctrl->bus_p_syscon,
+ BUS_SYSCON_BUS_PATH_ENABLE, val);
+ if (ret)
+ return ret;
+
+ ret = regmap_write(artpec8_ctrl->bus_s_syscon,
+ BUS_SYSCON_BUS_PATH_ENABLE, val);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
+static int artpec8_pcie_config_isolation(struct dw_pcie *pci,
+ enum artpec8_pcie_isolation val)
+{
+ int ret;
+ /* reg_val[0] : for phy power isolation */
+ /* reg_val[1] : for bus enable */
+ enum artpec8_pcie_reg_bit reg_val[2];
+
+ switch (val) {
+ case PCIE_CLEAR_ISOLATION:
+ reg_val[0] = PCIE_REG_BIT_LOW;
+ reg_val[1] = PCIE_REG_BIT_HIGH;
+ break;
+ case PCIE_SET_ISOLATION:
+ reg_val[0] = PCIE_REG_BIT_HIGH;
+ reg_val[1] = PCIE_REG_BIT_LOW;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = artpec8_pcie_config_phy_power_isolation(pci, reg_val[0]);
+ if (ret)
+ return ret;
+
+ ret = artpec8_pcie_config_bus_enable(pci, reg_val[1]);
+ if (ret)
+ return ret;
+
+ return ret;
+}
+
+static int artpec8_pcie_config_perstn(struct dw_pcie *pci,
+ enum artpec8_pcie_reg_bit val)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ unsigned int bits;
+ int ret;
+
+ if (val == PCIE_REG_BIT_HIGH)
+ bits = PCIE_PERSTN;
+ else
+ bits = 0;
+
+ ret = regmap_update_bits(artpec8_ctrl->sysreg, FSYS_PCIE_CON,
+ PCIE_PERSTN, bits);
+
+ return ret;
+}
+
+static void artpec8_pcie_stop_link(struct dw_pcie *pci)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ u32 val;
+
+ val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
+ PCIE_APP_LTSSM_ENABLE);
+
+ val &= ~PCIE_ELBI_LTSSM_ENABLE;
+ artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
+ PCIE_APP_LTSSM_ENABLE);
+}
+
+static int artpec8_pcie_start_link(struct dw_pcie *pci)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ u32 val;
+
+ dw_pcie_dbi_ro_wr_en(pci);
+
+ /* Equalization disable */
+ val = artpec8_pcie_read_dbi(pci, pci->dbi_base, PCIE_GEN3_RELATED_OFF,
+ 4);
+ artpec8_pcie_write_dbi(pci, pci->dbi_base, PCIE_GEN3_RELATED_OFF, 4,
+ val | PCIE_GEN3_EQUALIZATION_DISABLE);
+
+ dw_pcie_dbi_ro_wr_dis(pci);
+
+ /* assert LTSSM enable */
+ val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
+ PCIE_APP_LTSSM_ENABLE);
+
+ val |= PCIE_ELBI_LTSSM_ENABLE;
+ artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
+ PCIE_APP_LTSSM_ENABLE);
+
+ return 0;
+}
+
+static irqreturn_t artpec8_pcie_msi_irq_handler(int irq, void *arg)
+{
+ struct artpec8_pcie *artpec8_ctrl = arg;
+ struct dw_pcie *pci = artpec8_ctrl->pci;
+ struct pcie_port *pp = &pci->pp;
+ u32 val;
+
+ val = artpec8_pcie_readl(artpec8_ctrl->elbi_base, PCIE_IRQ2_STS);
+
+ if ((val & IRQ_MSI_ENABLE) == IRQ_MSI_ENABLE) {
+ val &= IRQ_MSI_ENABLE;
+ artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
+ PCIE_IRQ2_STS);
+ dw_handle_msi_irq(pp);
+ }
+
+ return IRQ_HANDLED;
+}
+
+static void artpec8_pcie_msi_init(struct artpec8_pcie *artpec8_ctrl)
+{
+ u32 val;
+
+ /* enable MSI interrupt */
+ val = artpec8_pcie_readl(artpec8_ctrl->elbi_base, PCIE_IRQ2_EN);
+ val |= IRQ_MSI_ENABLE;
+ artpec8_pcie_writel(artpec8_ctrl->elbi_base, val, PCIE_IRQ2_EN);
+}
+
+static void artpec8_pcie_enable_interrupts(struct artpec8_pcie *artpec8_ctrl)
+{
+ if (IS_ENABLED(CONFIG_PCI_MSI))
+ artpec8_pcie_msi_init(artpec8_ctrl);
+}
+
+static u32 artpec8_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
+ u32 reg, size_t size)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ u32 val;
+ bool is_atu = false;
+
+ if (base == pci->atu_base) {
+ is_atu = true;
+ base = pci->dbi_base;
+ regmap_write(artpec8_ctrl->sysreg,
+ artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
+ FSYS_PCIE_DBI_ADDR_OVR_ATU);
+ }
+
+ dw_pcie_read(base + reg, size, &val);
+
+ if (is_atu)
+ regmap_write(artpec8_ctrl->sysreg,
+ artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
+ FSYS_PCIE_DBI_ADDR_OVR_CDM);
+
+ return val;
+}
+
+static void artpec8_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
+ u32 reg, size_t size, u32 val)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ bool is_atu = false;
+
+ if (base == pci->atu_base) {
+ is_atu = true;
+ base = pci->dbi_base;
+ regmap_write(artpec8_ctrl->sysreg,
+ artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
+ FSYS_PCIE_DBI_ADDR_OVR_ATU);
+ }
+
+ dw_pcie_write(base + reg, size, val);
+
+ if (is_atu)
+ regmap_write(artpec8_ctrl->sysreg,
+ artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
+ FSYS_PCIE_DBI_ADDR_OVR_CDM);
+}
+
+static void artpec8_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base,
+ u32 reg, size_t size, u32 val)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+
+ regmap_write(artpec8_ctrl->sysreg,
+ artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
+ FSYS_PCIE_DBI_ADDR_OVR_SHADOW);
+
+ dw_pcie_write(base + reg, size, val);
+
+ regmap_write(artpec8_ctrl->sysreg,
+ artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
+ FSYS_PCIE_DBI_ADDR_OVR_CDM);
+}
+
+static int artpec8_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 *val)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
+
+ if (PCI_SLOT(devfn)) {
+ *val = ~0;
+ return PCIBIOS_DEVICE_NOT_FOUND;
+ }
+
+ *val = dw_pcie_read_dbi(pci, where, size);
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static int artpec8_pcie_wr_own_conf(struct pci_bus *bus, unsigned int devfn,
+ int where, int size, u32 val)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
+
+ if (PCI_SLOT(devfn))
+ return PCIBIOS_DEVICE_NOT_FOUND;
+
+ dw_pcie_write_dbi(pci, where, size, val);
+ return PCIBIOS_SUCCESSFUL;
+}
+
+static struct pci_ops artpec8_pci_ops = {
+ .read = artpec8_pcie_rd_own_conf,
+ .write = artpec8_pcie_wr_own_conf,
+};
+
+static int artpec8_pcie_link_up(struct dw_pcie *pci)
+{
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+ u32 val;
+
+ val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
+ PCIE_ELBI_CXPL_DEBUG_00_31);
+
+ return (val & LTSSM_STATE_MASK) == LTSSM_STATE_L0;
+}
+
+static int artpec8_pcie_host_init(struct pcie_port *pp)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
+ struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
+
+ pp->bridge->ops = &artpec8_pci_ops;
+
+ dw_pcie_writel_dbi(pci, PCIE_GEN3_RELATED_OFF,
+ (PCIE_GEN3_EQ_PHASE_2_3 |
+ PCIE_GEN3_RXEQ_PH01_EN |
+ PCIE_GEN3_RXEQ_RGRDLESS_RXTS));
+
+ artpec8_pcie_enable_interrupts(artpec8_ctrl);
+
+ return 0;
+}
+
+static const struct dw_pcie_host_ops artpec8_pcie_host_ops = {
+ .host_init = artpec8_pcie_host_init,
+};
+
+static u8 artpec8_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
+{
+ u32 val;
+
+ val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
+ pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET;
+
+ if (val == 0xffffffff)
+ return 1;
+
+ return 0;
+}
+
+static void artpec8_pcie_ep_init(struct dw_pcie_ep *ep)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+ enum pci_barno bar;
+ /* Currently PCIe EP core is not setting iatu_unroll_enabled
+ * so let's handle it here. We need to find proper place to
+ * initialize this so that it can be used as for other EP
+ * controllers as well.
+ */
+ pci->iatu_unroll_enabled = artpec8_pcie_iatu_unroll_enabled(pci);
+
+ for (bar = BAR_0; bar <= BAR_5; bar++)
+ dw_pcie_ep_reset_bar(pci, bar);
+}
+
+static int artpec8_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
+ enum pci_epc_irq_type type, u16 interrupt_num)
+{
+ struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
+
+ switch (type) {
+ case PCI_EPC_IRQ_LEGACY:
+ return -EINVAL;
+ case PCI_EPC_IRQ_MSI:
+ return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
+ default:
+ dev_err(pci->dev, "UNKNOWN IRQ type\n");
+ }
+
+ return 0;
+}
+
+static const struct pci_epc_features artpec8_pcie_epc_features = {
+ .linkup_notifier = false,
+ .msi_capable = true,
+ .msix_capable = false,
+};
+
+static const struct pci_epc_features*
+artpec8_pcie_ep_get_features(struct dw_pcie_ep *ep)
+{
+ return &artpec8_pcie_epc_features;
+}
+
+static const struct dw_pcie_ep_ops artpec8_dw_pcie_ep_ops = {
+ .ep_init = artpec8_pcie_ep_init,
+ .raise_irq = artpec8_pcie_raise_irq,
+ .get_features = artpec8_pcie_ep_get_features,
+};
+
+static int __init artpec8_add_pcie_ep(struct artpec8_pcie *artpec8_ctrl,
+ struct platform_device *pdev)
+{
+ int ret;
+ struct dw_pcie_ep *ep;
+ struct dw_pcie *pci = artpec8_ctrl->pci;
+
+ ep = &pci->ep;
+ ep->ops = &artpec8_dw_pcie_ep_ops;
+
+ dw_pcie_writel_dbi(pci, PCIE_GEN3_RELATED_OFF,
+ (PCIE_GEN3_EQ_PHASE_2_3 |
+ PCIE_GEN3_RXEQ_PH01_EN |
+ PCIE_GEN3_RXEQ_RGRDLESS_RXTS));
+
+ ret = dw_pcie_ep_init(ep);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static int __init artpec8_add_pcie_port(struct artpec8_pcie *artpec8_ctrl,
+ struct platform_device *pdev)
+{
+ struct dw_pcie *pci = artpec8_ctrl->pci;
+ struct pcie_port *pp = &pci->pp;
+ struct device *dev = &pdev->dev;
+ int ret;
+ int irq_flags;
+ int irq;
+
+ if (IS_ENABLED(CONFIG_PCI_MSI)) {
+ irq = platform_get_irq_byname(pdev, "intr");
+ if (!irq)
+ return -ENODEV;
+
+ irq_flags = IRQF_SHARED | IRQF_NO_THREAD;
+
+ ret = devm_request_irq(dev, irq, artpec8_pcie_msi_irq_handler,
+ irq_flags, "artpec8-pcie", artpec8_ctrl);
+ if (ret)
+ return ret;
+ }
+
+ /* Prevent core for messing with the IRQ, since it's muxed */
+ pp->msi_irq = -ENODEV;
+
+ ret = dw_pcie_host_init(pp);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+
+static const struct dw_pcie_ops artpec8_dw_pcie_ops = {
+ .read_dbi = artpec8_pcie_read_dbi,
+ .write_dbi = artpec8_pcie_write_dbi,
+ .write_dbi2 = artpec8_pcie_write_dbi2,
+ .start_link = artpec8_pcie_start_link,
+ .stop_link = artpec8_pcie_stop_link,
+ .link_up = artpec8_pcie_link_up,
+};
+
+static int artpec8_pcie_probe(struct platform_device *pdev)
+{
+ int ret;
+ struct dw_pcie *pci;
+ struct pcie_port *pp;
+ struct artpec8_pcie *artpec8_ctrl;
+ enum dw_pcie_device_mode mode;
+ struct device *dev = &pdev->dev;
+ const struct artpec8_pcie_pdata *pdata;
+ struct device_node *np = dev->of_node;
+
+ artpec8_ctrl = devm_kzalloc(dev, sizeof(*artpec8_ctrl), GFP_KERNEL);
+ if (!artpec8_ctrl)
+ return -ENOMEM;
+
+ pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
+ if (!pci)
+ return -ENOMEM;
+
+ pdata = (const struct artpec8_pcie_pdata *)
+ of_device_get_match_data(dev);
+ if (!pdata)
+ return -ENODEV;
+
+ mode = (enum dw_pcie_device_mode)pdata->mode;
+
+ artpec8_ctrl->pci = pci;
+ artpec8_ctrl->pdata = pdata;
+ artpec8_ctrl->mode = mode;
+
+ pci->dev = dev;
+ pci->ops = pdata->dwc_ops;
+ pci->dbi_base2 = NULL;
+ pci->dbi_base = NULL;
+ pp = &pci->pp;
+ pp->ops = artpec8_ctrl->pdata->host_ops;
+
+ if (mode == DW_PCIE_RC_TYPE)
+ artpec8_ctrl->link_id = of_alias_get_id(np, "pcierc");
+ else
+ artpec8_ctrl->link_id = of_alias_get_id(np, "pcieep");
+
+ ret = artpec8_pcie_get_subsystem_resources(pdev, artpec8_ctrl);
+ if (ret)
+ return ret;
+
+ if (pdata->res_ops && pdata->res_ops->get_mem_resources) {
+ ret = pdata->res_ops->get_mem_resources(pdev, artpec8_ctrl);
+ if (ret)
+ return ret;
+ }
+
+ if (pdata->res_ops && pdata->res_ops->get_clk_resources) {
+ ret = pdata->res_ops->get_clk_resources(pdev, artpec8_ctrl);
+ if (ret)
+ return ret;
+
+ ret = pdata->res_ops->init_clk_resources(artpec8_ctrl);
+ if (ret)
+ return ret;
+ }
+
+ platform_set_drvdata(pdev, artpec8_ctrl);
+
+ ret = artpec8_pcie_config_isolation(pci, PCIE_CLEAR_ISOLATION);
+ if (ret)
+ return ret;
+
+ ret = artpec8_pcie_config_perstn(pci, PCIE_REG_BIT_HIGH);
+ if (ret)
+ return ret;
+
+ artpec8_ctrl->phy = devm_of_phy_get(dev, np, NULL);
+ if (IS_ERR(artpec8_ctrl->phy))
+ return PTR_ERR(artpec8_ctrl->phy);
+
+ phy_init(artpec8_ctrl->phy);
+ phy_reset(artpec8_ctrl->phy);
+
+ switch (mode) {
+ case DW_PCIE_RC_TYPE:
+ artpec8_pcie_writel(artpec8_ctrl->elbi_base, DEVICE_TYPE_RC,
+ PCIE_ARTPEC8_DEVICE_TYPE);
+ ret = artpec8_add_pcie_port(artpec8_ctrl, pdev);
+ if (ret < 0)
+ goto fail_probe;
+ break;
+ case DW_PCIE_EP_TYPE:
+ artpec8_pcie_writel(artpec8_ctrl->elbi_base, DEVICE_TYPE_EP,
+ PCIE_ARTPEC8_DEVICE_TYPE);
+
+ ret = artpec8_add_pcie_ep(artpec8_ctrl, pdev);
+ if (ret < 0)
+ goto fail_probe;
+ break;
+ default:
+ ret = -EINVAL;
+ goto fail_probe;
+ }
+
+ return 0;
+
+fail_probe:
+ phy_exit(artpec8_ctrl->phy);
+ if (pdata->res_ops && pdata->res_ops->deinit_clk_resources)
+ pdata->res_ops->deinit_clk_resources(artpec8_ctrl);
+
+ return ret;
+}
+
+static int __exit artpec8_pcie_remove(struct platform_device *pdev)
+{
+ struct artpec8_pcie *artpec8_ctrl = platform_get_drvdata(pdev);
+ const struct artpec8_pcie_pdata *pdata = artpec8_ctrl->pdata;
+
+ if (pdata->res_ops && pdata->res_ops->deinit_clk_resources)
+ pdata->res_ops->deinit_clk_resources(artpec8_ctrl);
+
+ return 0;
+}
+
+static const struct artpec8_pcie_pdata artpec8_pcie_rc_pdata = {
+ .dwc_ops = &artpec8_dw_pcie_ops,
+ .host_ops = &artpec8_pcie_host_ops,
+ .res_ops = &artpec8_pcie_rc_res_ops,
+ .mode = DW_PCIE_RC_TYPE,
+};
+
+static const struct artpec8_pcie_pdata artpec8_pcie_ep_pdata = {
+ .dwc_ops = &artpec8_dw_pcie_ops,
+ .host_ops = &artpec8_pcie_host_ops,
+ .res_ops = &artpec8_pcie_ep_res_ops,
+ .mode = DW_PCIE_EP_TYPE,
+};
+
+static const struct of_device_id artpec8_pcie_of_match[] = {
+ {
+ .compatible = "axis,artpec8-pcie",
+ .data = &artpec8_pcie_rc_pdata,
+ },
+ {
+ .compatible = "axis,artpec8-pcie-ep",
+ .data = &artpec8_pcie_ep_pdata,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, artpec8_pcie_of_match);
+
+static struct platform_driver artpec8_pcie_driver = {
+ .probe = artpec8_pcie_probe,
+ .remove = __exit_p(artpec8_pcie_remove),
+ .driver = {
+ .name = "artpec8-pcie",
+ .of_match_table = artpec8_pcie_of_match,
+ },
+};
+
+module_platform_driver(artpec8_pcie_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jaeho Cho <jaeho79.cho@samsung.com>");
--
2.9.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p7>
@ 2022-06-03 2:38 ` Wangseok Lee
2022-06-06 10:28 ` Krzysztof Kozlowski
0 siblings, 1 reply; 18+ messages in thread
From: Wangseok Lee @ 2022-06-03 2:38 UTC (permalink / raw)
To: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
Add support Axis, ARTPEC-8 SoC.
ARTPEC-8 is the SoC platform of Axis Communications.
This is based on arm64 and support GEN4 & 2lane.
This driver provides PHY interface for ARTPEC-8 SoC PCIe controller,
based on Samsung PCIe PHY IP.
Main changes since v1 [1]:
-change folder name of phy driver to axis from artpec
Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
---
drivers/phy/Kconfig | 1 +
drivers/phy/Makefile | 1 +
drivers/phy/axis/Kconfig | 9 +
drivers/phy/axis/Makefile | 2 +
drivers/phy/axis/phy-artpec8-pcie.c | 806 ++++++++++++++++++++++++++++++++++++
5 files changed, 819 insertions(+)
create mode 100644 drivers/phy/axis/Kconfig
create mode 100644 drivers/phy/axis/Makefile
create mode 100644 drivers/phy/axis/phy-artpec8-pcie.c
diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
index 300b0f2..92b8232 100644
--- a/drivers/phy/Kconfig
+++ b/drivers/phy/Kconfig
@@ -73,6 +73,7 @@ config PHY_CAN_TRANSCEIVER
source "drivers/phy/allwinner/Kconfig"
source "drivers/phy/amlogic/Kconfig"
+source "drivers/phy/axis/Kconfig"
source "drivers/phy/broadcom/Kconfig"
source "drivers/phy/cadence/Kconfig"
source "drivers/phy/freescale/Kconfig"
diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
index 01e9eff..808c055e 100644
--- a/drivers/phy/Makefile
+++ b/drivers/phy/Makefile
@@ -12,6 +12,7 @@ obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
obj-$(CONFIG_USB_LGM_PHY) += phy-lgm-usb.o
obj-y += allwinner/ \
amlogic/ \
+ axis/ \
broadcom/ \
cadence/ \
freescale/ \
diff --git a/drivers/phy/axis/Kconfig b/drivers/phy/axis/Kconfig
new file mode 100644
index 0000000..7198b93
--- /dev/null
+++ b/drivers/phy/axis/Kconfig
@@ -0,0 +1,9 @@
+config PHY_ARTPEC8_PCIE
+ bool "ARTPEC-8 PCIe PHY driver"
+ depends on OF && (ARCH_ARTPEC8 || COMPILE_TEST)
+ select GENERIC_PHY
+ help
+ Enable PCIe PHY support for ARTPEC-8 SoC.
+ This driver provides PHY interface for ARTPEC-8 SoC
+ PCIe controller.
+ This is based on Samsung PCIe PHY IP.
diff --git a/drivers/phy/axis/Makefile b/drivers/phy/axis/Makefile
new file mode 100644
index 0000000..45d853c
--- /dev/null
+++ b/drivers/phy/axis/Makefile
@@ -0,0 +1,2 @@
+# SPDX-License-Identifier: GPL-2.0
+obj-$(CONFIG_PHY_ARTPEC8_PCIE) += phy-artpec8-pcie.o
diff --git a/drivers/phy/axis/phy-artpec8-pcie.c b/drivers/phy/axis/phy-artpec8-pcie.c
new file mode 100644
index 0000000..2742301
--- /dev/null
+++ b/drivers/phy/axis/phy-artpec8-pcie.c
@@ -0,0 +1,806 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * PHY provider for ARTPEC-8 PCIe controller
+ *
+ * Copyright (C) 2019 Samsung Electronics Co., Ltd.
+ * http://www.samsung.com
+ *
+ * Author: Jaeho Cho <jaeho79.cho@samsung.com>
+ */
+
+#include <linux/clk.h>
+#include <linux/io.h>
+#include <linux/init.h>
+#include <linux/mfd/syscon.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/of_address.h>
+#include <linux/of_platform.h>
+#include <linux/platform_device.h>
+#include <linux/phy/phy.h>
+#include <linux/regmap.h>
+#include <linux/debugfs.h>
+
+/* ARTPEC-8 PCIe PHY registers */
+/* CMN registers */
+#define PCIE_PHY_CMN_REG004 0x10
+#define PCIE_PHY_CMN_REG00B 0x2C
+#define PCIE_PHY_CMN_REG016 0x58
+#define PCIE_PHY_CMN_REG01C 0x70
+#define PCIE_PHY_CMN_REG021 0x84
+#define PCIE_PHY_CMN_REG024 0x90
+#define PCIE_PHY_CMN_REG025 0x94
+#define PCIE_PHY_CMN_REG0E6 0x398
+#define PCIE_PHY_CMN_REG0E7 0x39C
+#define PCIE_PHY_CMN_REG0E8 0x3A0
+#define PCIE_PHY_CMN_REG0E9 0x3A4
+#define PCIE_PHY_CMN_REG0EA 0x3A8
+#define PCIE_PHY_CMN_REG0EB 0x3AC
+#define PCIE_PHY_CMN_REG0EC 0x3B0
+#define PCIE_PHY_CMN_REG0EE 0x3B8
+#define PCIE_PHY_CMN_REG0EF 0x3BC
+#define PCIE_PHY_CMN_REG0F1 0x3C4
+#define PCIE_PHY_CMN_REG0F3 0x3CC
+#define PCIE_PHY_CMN_REG0F4 0x3D0
+
+#define PCIE_PHY_CMN_REG101 0x404
+#define OV_I_CMN_RSTN BIT(4)
+#define OV_I_INIT_RSTN BIT(6)
+
+#define PCIE_PHY_CMN_REG131 0x4C4
+#define PCIE_PHY_CMN_REG17B 0x5EC
+#define PCIE_PHY_CMN_REG17D 0x5F4
+#define PCIE_PHY_CMN_REG190 0x640
+#define PCIE_PHY_CMN_REG191 0x644
+#define PCIE_PHY_CMN_REG192 0x648
+#define PCIE_PHY_CMN_REG1C7 0x71C
+#define PCIE_PHY_CMN_REG1DF 0x77C
+#define PCIE_PHY_CMN_REG1E0 0x780
+
+#define PCIE_PHY_CMN_REG0B1 0x2C4
+#define ANA_ROPLL_REF_DIG_CLK_SEL BIT(2)
+
+/* External clock */
+#define PCIE_PHY_CMN_REG14D 0x534
+#define PCIE_AUX_RX_MODE_EXTEND BIT(7)
+
+#define PCIE_PHY_CMN_REG0D9 0x364
+#define ANA_AUX_EXT_REF_CLK_SEL BIT(4)
+
+#define PCIE_PHY_CMN_REG10F 0x43C
+#define AUX_PLL_EN_EXTEND BIT(4)
+
+#define PCIE_PHY_CMN_REG11E 0x478
+#define AUX2_PLL_EN_EXTEND BIT(3)
+
+#define PCIE_PHY_CMN_REG0D4 0x350
+#define OV_S_ANA_AUX_EN BIT(3)
+#define OV_I_ANA_AUX_EN BIT(2)
+
+/* LANE registers */
+#define PCIE_PHY_TRSV_REG22D 0x8B4
+#define PCIE_PHY_TRSV_REG23E 0x8F8
+#define PCIE_PHY_TRSV_REG2A5 0xA94
+#define PCIE_PHY_TRSV_REG3E3 0xF8C
+#define PCIE_PHY_TRSV_REG3ED 0xFB4
+#define PCIE_PHY_TRSV_REG20B 0x82C
+#define PCIE_PHY_TRSV_REG20C 0x830
+#define PCIE_PHY_TRSV_REG234 0x8D0
+#define PCIE_PHY_TRSV_REG235 0x8D4
+#define PCIE_PHY_TRSV_REG237 0x8DC
+#define PCIE_PHY_TRSV_REG239 0x8E4
+#define PCIE_PHY_TRSV_REG23A 0x8E8
+#define PCIE_PHY_TRSV_REG23B 0x8EC
+#define PCIE_PHY_TRSV_REG24B 0x92C
+#define PCIE_PHY_TRSV_REG25D 0x974
+#define PCIE_PHY_TRSV_REG262 0x988
+#define PCIE_PHY_TRSV_REG271 0x9C4
+#define PCIE_PHY_TRSV_REG272 0x9C8
+#define PCIE_PHY_TRSV_REG27C 0x9F0
+#define PCIE_PHY_TRSV_REG27D 0x9F4
+#define PCIE_PHY_TRSV_REG27E 0x9F8
+#define PCIE_PHY_TRSV_REG284 0xA10
+#define PCIE_PHY_TRSV_REG289 0xA24
+#define PCIE_PHY_TRSV_REG28A 0xA28
+#define PCIE_PHY_TRSV_REG28B 0xA2C
+#define PCIE_PHY_TRSV_REG28C 0xA30
+#define PCIE_PHY_TRSV_REG28E 0xA38
+#define PCIE_PHY_TRSV_REG28F 0xA3C
+#define PCIE_PHY_TRSV_REG290 0xA40
+#define PCIE_PHY_TRSV_REG291 0xA44
+#define PCIE_PHY_TRSV_REG292 0xA48
+#define PCIE_PHY_TRSV_REG294 0xA50
+#define PCIE_PHY_TRSV_REG295 0xA54
+#define PCIE_PHY_TRSV_REG296 0xA58
+#define PCIE_PHY_TRSV_REG297 0xA5C
+#define PCIE_PHY_TRSV_REG298 0xA60
+#define PCIE_PHY_TRSV_REG29B 0xA6C
+#define PCIE_PHY_TRSV_REG29C 0xA70
+#define PCIE_PHY_TRSV_REG29D 0xA74
+#define PCIE_PHY_TRSV_REG29E 0xA78
+#define PCIE_PHY_TRSV_REG2AA 0xAA8
+#define PCIE_PHY_TRSV_REG2AE 0xAB8
+#define PCIE_PHY_TRSV_REG2C2 0xB08
+#define PCIE_PHY_TRSV_REG2C6 0xB18
+#define PCIE_PHY_TRSV_REG2C7 0xB1C
+#define PCIE_PHY_TRSV_REG2CB 0xB2C
+#define PCIE_PHY_TRSV_REG2CC 0xB30
+#define PCIE_PHY_TRSV_REG2CD 0xB34
+#define PCIE_PHY_TRSV_REG2CE 0xB38
+#define PCIE_PHY_TRSV_REG2D0 0xB40
+#define PCIE_PHY_TRSV_REG2CF 0xB3C
+#define PCIE_PHY_TRSV_REG2E0 0xB80
+#define PCIE_PHY_TRSV_REG2E9 0xBA4
+#define PCIE_PHY_TRSV_REG2EA 0xBA8
+#define PCIE_PHY_TRSV_REG2EB 0xBAC
+#define PCIE_PHY_TRSV_REG315 0xC54
+#define PCIE_PHY_TRSV_REG317 0xC5C
+#define PCIE_PHY_TRSV_REG319 0xC64
+#define PCIE_PHY_TRSV_REG364 0xD90
+#define PCIE_PHY_TRSV_REG36C 0xDB0
+#define PCIE_PHY_TRSV_REG36D 0xDB4
+#define PCIE_PHY_TRSV_REG37E 0xDF8
+#define PCIE_PHY_TRSV_REG37F 0xDFC
+#define PCIE_PHY_TRSV_REG38F 0xE3C
+#define PCIE_PHY_TRSV_REG391 0xE44
+#define PCIE_PHY_TRSV_REG39C 0xE70
+#define PCIE_PHY_TRSV_REG3A8 0xEA0
+#define PCIE_PHY_TRSV_REG3E0 0xF80
+#define PCIE_PHY_TRSV_REG3E1 0xF84
+#define PCIE_PHY_TRSV_REG3E7 0xF9C
+#define PCIE_PHY_TRSV_REG3E9 0xFA4
+#define PCIE_PHY_TRSV_REG3EA 0xFA8
+#define PCIE_PHY_TRSV_REG3EE 0xFB8
+#define PCIE_PHY_TRSV_REG3EF 0xFBC
+#define PCIE_PHY_TRSV_REG3F0 0xFC0
+
+#define PCIE_PHY_TRSV_REG2C0 0xB00
+#define LN_EQ_CTRL_RX_DATA_HOLD BIT(5)
+
+/* RX Preset registers */
+#define PCIE_PHY_CMN_REG17E 0x5F8
+#define PCIE_PHY_CMN_REG180 0x600
+#define PCIE_PHY_CMN_REG181 0x604
+#define PCIE_PHY_CMN_REG182 0x608
+#define PCIE_PHY_CMN_REG183 0x60C
+#define PCIE_PHY_CMN_REG184 0x610
+#define PCIE_PHY_CMN_REG185 0x614
+#define PCIE_PHY_CMN_REG186 0x618
+#define PCIE_PHY_CMN_REG187 0x61C
+
+
+/* ARTPEC-8 PCIe PCS registers */
+#define PCIE_PCS_OUT_VEC_4 0x154
+#define B1_DYNAMIC BIT(3)
+
+/* ARTPEC-8 SYS REG registers */
+#define FSYS_PCIE_CON 0x424
+#define PCIE_PHY_LCPLL_REFCLK_SEL 0x3
+#define PCIE_PHY_ROPLL_REFCLK_SEL (0x3UL << 2)
+#define ROPLL_REFCLK_NOT_AVAILABLE (0x2UL << 2)
+#define PCIE_PHY_LN0_REFCLK_PAD_EN BIT(10)
+#define PCIE_PHY_LN1_REFCLK_PAD_EN BIT(11)
+#define PCIE_PHY_PWR_OFF BIT(7)
+
+/* ARTPEC-8 Sub Controller registers */
+#define SFR_INIT_RSTN 0x1404
+#define SFR_CMN_RSTN 0x1408
+
+#define PCIE_PHY_LN0_REG_START 0x800
+#define PCIE_PHY_LN0_REG_END 0xFCC
+#define OFFSET_PER_LANE 0x800
+
+enum artpec8_pcie_phy_num_lanes {
+ LANE0 = 0,
+ LANE1,
+ LANE_MAX
+};
+
+struct artpec8_pcie_phy_data {
+ const struct phy_ops *ops;
+};
+
+struct artpec8_pcie_phy {
+ const struct artpec8_pcie_phy_data *drv_data;
+ void __iomem *phy_base;
+ void __iomem *pcs_base;
+ void __iomem *elbi_base;
+ struct clk *soc_pll_clk;
+ struct regmap *sysreg;
+ u32 lcpll_ref_clk;
+ const char *mode;
+ u32 num_lanes;
+};
+
+enum artpec8_pcie_ref_clk {
+ REF_CLK_FROM_XO = 0,
+ REF_CLK_FROM_IO,
+ REF_CLK_RESERVED,
+ REF_CLK_FROM_SOC_PLL,
+ REF_CLK_MAX
+};
+
+struct artpec8_pcie_phy_tune_reg {
+ u32 offset;
+ u32 val;
+};
+
+/* ARTPEC-8 PCIe Gen4 x2 PHY CMN register settings */
+struct artpec8_pcie_phy_tune_reg cmn_regs[] = {
+ {PCIE_PHY_CMN_REG004, 0x65},
+ {PCIE_PHY_CMN_REG00B, 0x18},
+ {PCIE_PHY_CMN_REG016, 0x0E},
+ {PCIE_PHY_CMN_REG01C, 0x4F},
+ {PCIE_PHY_CMN_REG021, 0x01},
+ {PCIE_PHY_CMN_REG024, 0x58},
+ {PCIE_PHY_CMN_REG025, 0x98},
+ {PCIE_PHY_CMN_REG0E6, 0x00},
+ {PCIE_PHY_CMN_REG0E7, 0x00},
+ {PCIE_PHY_CMN_REG0E8, 0x3F},
+ {PCIE_PHY_CMN_REG0E9, 0x3F},
+ {PCIE_PHY_CMN_REG0EA, 0xFF},
+ {PCIE_PHY_CMN_REG0EB, 0xFF},
+ {PCIE_PHY_CMN_REG0EC, 0x42},
+ {PCIE_PHY_CMN_REG0EE, 0x3F},
+ {PCIE_PHY_CMN_REG0EF, 0x7F},
+ {PCIE_PHY_CMN_REG0F1, 0x02},
+ {PCIE_PHY_CMN_REG0F3, 0xFF},
+ {PCIE_PHY_CMN_REG0F4, 0xFF},
+ {PCIE_PHY_CMN_REG131, 0x01},
+ {PCIE_PHY_CMN_REG17B, 0xC0},
+ {PCIE_PHY_CMN_REG17D, 0xAF},
+ {PCIE_PHY_CMN_REG190, 0x27},
+ {PCIE_PHY_CMN_REG191, 0x0F},
+ {PCIE_PHY_CMN_REG192, 0x3F},
+ {PCIE_PHY_CMN_REG1C7, 0x05},
+ {PCIE_PHY_CMN_REG1DF, 0x28},
+ {PCIE_PHY_CMN_REG1E0, 0x28},
+};
+
+/* ARTPEC-8 PCIe Gen4 x2 PHY lane register settings */
+struct artpec8_pcie_phy_tune_reg lane_regs[] = {
+ {PCIE_PHY_TRSV_REG22D, 0x00},
+ {PCIE_PHY_TRSV_REG23E, 0x00},
+ {PCIE_PHY_TRSV_REG2A5, 0x73},
+ {PCIE_PHY_TRSV_REG3E3, 0x7B},
+ {PCIE_PHY_TRSV_REG3ED, 0x4B},
+ {PCIE_PHY_TRSV_REG20B, 0x02},
+ {PCIE_PHY_TRSV_REG20C, 0xEA},
+ {PCIE_PHY_TRSV_REG234, 0x7A},
+ {PCIE_PHY_TRSV_REG235, 0x1C},
+ {PCIE_PHY_TRSV_REG237, 0x10},
+ {PCIE_PHY_TRSV_REG239, 0x68},
+ {PCIE_PHY_TRSV_REG23A, 0xC0},
+ {PCIE_PHY_TRSV_REG23B, 0x0B},
+ {PCIE_PHY_TRSV_REG24B, 0x00},
+ {PCIE_PHY_TRSV_REG25D, 0x07},
+ {PCIE_PHY_TRSV_REG262, 0x07},
+ {PCIE_PHY_TRSV_REG271, 0x23},
+ {PCIE_PHY_TRSV_REG272, 0x5E},
+ {PCIE_PHY_TRSV_REG27C, 0x8C},
+ {PCIE_PHY_TRSV_REG27D, 0x5B},
+ {PCIE_PHY_TRSV_REG27E, 0x2C},
+ {PCIE_PHY_TRSV_REG284, 0x33},
+ {PCIE_PHY_TRSV_REG289, 0xD4},
+ {PCIE_PHY_TRSV_REG28A, 0xCC},
+ {PCIE_PHY_TRSV_REG28B, 0xD9},
+ {PCIE_PHY_TRSV_REG28C, 0xDC},
+ {PCIE_PHY_TRSV_REG28E, 0xC6},
+ {PCIE_PHY_TRSV_REG28F, 0x90},
+ {PCIE_PHY_TRSV_REG290, 0x4D},
+ {PCIE_PHY_TRSV_REG291, 0x19},
+ {PCIE_PHY_TRSV_REG292, 0x1C},
+ {PCIE_PHY_TRSV_REG294, 0x05},
+ {PCIE_PHY_TRSV_REG295, 0x10},
+ {PCIE_PHY_TRSV_REG296, 0x0C},
+ {PCIE_PHY_TRSV_REG297, 0x19},
+ {PCIE_PHY_TRSV_REG298, 0x04},
+ {PCIE_PHY_TRSV_REG29B, 0x03},
+ {PCIE_PHY_TRSV_REG29C, 0x1B},
+ {PCIE_PHY_TRSV_REG29D, 0x1B},
+ {PCIE_PHY_TRSV_REG29E, 0x1F},
+ {PCIE_PHY_TRSV_REG2AA, 0x00},
+ {PCIE_PHY_TRSV_REG2AE, 0x1F},
+ {PCIE_PHY_TRSV_REG2C2, 0x25},
+ {PCIE_PHY_TRSV_REG2C6, 0x10},
+ {PCIE_PHY_TRSV_REG2C7, 0x06},
+ {PCIE_PHY_TRSV_REG2CB, 0x10},
+ {PCIE_PHY_TRSV_REG2CC, 0x06},
+ {PCIE_PHY_TRSV_REG2CD, 0x20},
+ {PCIE_PHY_TRSV_REG2CE, 0x27},
+ {PCIE_PHY_TRSV_REG2D0, 0x10},
+ {PCIE_PHY_TRSV_REG2CF, 0x0A},
+ {PCIE_PHY_TRSV_REG2E0, 0x01},
+ {PCIE_PHY_TRSV_REG2E9, 0x11},
+ {PCIE_PHY_TRSV_REG2EA, 0x05},
+ {PCIE_PHY_TRSV_REG2EB, 0x4C},
+ {PCIE_PHY_TRSV_REG315, 0x18},
+ {PCIE_PHY_TRSV_REG317, 0x86},
+ {PCIE_PHY_TRSV_REG319, 0x8E},
+ {PCIE_PHY_TRSV_REG364, 0x00},
+ {PCIE_PHY_TRSV_REG36C, 0x03},
+ {PCIE_PHY_TRSV_REG36D, 0x04},
+ {PCIE_PHY_TRSV_REG37E, 0x06},
+ {PCIE_PHY_TRSV_REG37F, 0x04},
+ {PCIE_PHY_TRSV_REG38F, 0x40},
+ {PCIE_PHY_TRSV_REG391, 0x8B},
+ {PCIE_PHY_TRSV_REG39C, 0xFF},
+ {PCIE_PHY_TRSV_REG3A8, 0x02},
+ {PCIE_PHY_TRSV_REG3E0, 0x93},
+ {PCIE_PHY_TRSV_REG3E1, 0x79},
+ {PCIE_PHY_TRSV_REG3E7, 0xF5},
+ {PCIE_PHY_TRSV_REG3E9, 0x75},
+ {PCIE_PHY_TRSV_REG3EA, 0x0D},
+ {PCIE_PHY_TRSV_REG3EE, 0xE2},
+ {PCIE_PHY_TRSV_REG3EF, 0x6F},
+ {PCIE_PHY_TRSV_REG3F0, 0x3D}
+};
+#define PCIE_PHY_CMN_REG17E 0x5F8
+#define PCIE_PHY_CMN_REG180 0x600
+#define PCIE_PHY_CMN_REG181 0x604
+#define PCIE_PHY_CMN_REG182 0x608
+#define PCIE_PHY_CMN_REG183 0x60C
+#define PCIE_PHY_CMN_REG184 0x610
+#define PCIE_PHY_CMN_REG185 0x614
+#define PCIE_PHY_CMN_REG186 0x618
+#define PCIE_PHY_CMN_REG187 0x61C
+
+struct artpec8_pcie_phy_tune_reg rx_preset_regs[] = {
+ /* 0 */
+ {PCIE_PHY_CMN_REG17E, 0x00},
+ {PCIE_PHY_CMN_REG180, 0x23},
+ {PCIE_PHY_CMN_REG181, 0x44},
+ {PCIE_PHY_CMN_REG182, 0x61},
+ {PCIE_PHY_CMN_REG183, 0x55},
+ {PCIE_PHY_CMN_REG184, 0x14},
+ {PCIE_PHY_CMN_REG185, 0x23},
+ {PCIE_PHY_CMN_REG186, 0x1A},
+ {PCIE_PHY_CMN_REG187, 0x04},
+ {PCIE_PHY_CMN_REG17E, 0x04},
+ {PCIE_PHY_CMN_REG17E, 0x00},
+ /* 1 */
+ {PCIE_PHY_CMN_REG17E, 0x08},
+ {PCIE_PHY_CMN_REG181, 0x42},
+ {PCIE_PHY_CMN_REG17E, 0x0C},
+ {PCIE_PHY_CMN_REG17E, 0x08},
+ /* 2 */
+ {PCIE_PHY_CMN_REG17E, 0x10},
+ {PCIE_PHY_CMN_REG181, 0x40},
+ {PCIE_PHY_CMN_REG17E, 0x14},
+ {PCIE_PHY_CMN_REG17E, 0x10},
+ /* 3 */
+ {PCIE_PHY_CMN_REG17E, 0x18},
+ {PCIE_PHY_CMN_REG181, 0x45},
+ {PCIE_PHY_CMN_REG17E, 0x1C},
+ {PCIE_PHY_CMN_REG17E, 0x18},
+ /* 4 */
+ {PCIE_PHY_CMN_REG17E, 0x20},
+ {PCIE_PHY_CMN_REG181, 0x46},
+ {PCIE_PHY_CMN_REG17E, 0x24},
+ {PCIE_PHY_CMN_REG17E, 0x20},
+ /* 5 */
+ {PCIE_PHY_CMN_REG17E, 0x28},
+ {PCIE_PHY_CMN_REG181, 0x48},
+ {PCIE_PHY_CMN_REG17E, 0x2C},
+ {PCIE_PHY_CMN_REG17E, 0x28},
+ /* 6 */
+ {PCIE_PHY_CMN_REG17E, 0x30},
+ {PCIE_PHY_CMN_REG181, 0x4A},
+ {PCIE_PHY_CMN_REG17E, 0x34},
+ {PCIE_PHY_CMN_REG17E, 0x30},
+ /* 7 */
+ {PCIE_PHY_CMN_REG17E, 0x38},
+ {PCIE_PHY_CMN_REG181, 0x4C},
+ {PCIE_PHY_CMN_REG17E, 0x3C},
+ {PCIE_PHY_CMN_REG17E, 0x38},
+ /* 8 */
+ {PCIE_PHY_CMN_REG17E, 0x40},
+ {PCIE_PHY_CMN_REG180, 0x20},
+ {PCIE_PHY_CMN_REG181, 0x20},
+ {PCIE_PHY_CMN_REG182, 0x01},
+ {PCIE_PHY_CMN_REG17E, 0x44},
+ {PCIE_PHY_CMN_REG17E, 0x40},
+ /* 9 */
+ {PCIE_PHY_CMN_REG17E, 0x48},
+ {PCIE_PHY_CMN_REG180, 0x20},
+ {PCIE_PHY_CMN_REG181, 0x21},
+ {PCIE_PHY_CMN_REG182, 0x01},
+ {PCIE_PHY_CMN_REG17E, 0x4C},
+ {PCIE_PHY_CMN_REG17E, 0x48},
+ /* 10 */
+ {PCIE_PHY_CMN_REG17E, 0x50},
+ {PCIE_PHY_CMN_REG180, 0x24},
+ {PCIE_PHY_CMN_REG181, 0x80},
+ {PCIE_PHY_CMN_REG182, 0x41},
+ {PCIE_PHY_CMN_REG183, 0xAF},
+ {PCIE_PHY_CMN_REG184, 0x26},
+ {PCIE_PHY_CMN_REG185, 0x34},
+ {PCIE_PHY_CMN_REG186, 0x24},
+ {PCIE_PHY_CMN_REG187, 0x06},
+ {PCIE_PHY_CMN_REG17E, 0x54},
+ {PCIE_PHY_CMN_REG17E, 0x50},
+ /* 11 */
+ {PCIE_PHY_CMN_REG17E, 0x58},
+ {PCIE_PHY_CMN_REG181, 0x81},
+ {PCIE_PHY_CMN_REG17E, 0x5C},
+ {PCIE_PHY_CMN_REG17E, 0x58},
+ /* 12 */
+ {PCIE_PHY_CMN_REG17E, 0x60},
+ {PCIE_PHY_CMN_REG181, 0x82},
+ {PCIE_PHY_CMN_REG17E, 0x64},
+ {PCIE_PHY_CMN_REG17E, 0x60},
+ /* 13 */
+ {PCIE_PHY_CMN_REG17E, 0x68},
+ {PCIE_PHY_CMN_REG181, 0x83},
+ {PCIE_PHY_CMN_REG17E, 0x6C},
+ {PCIE_PHY_CMN_REG17E, 0x68},
+ /* 14 */
+ {PCIE_PHY_CMN_REG17E, 0x70},
+ {PCIE_PHY_CMN_REG181, 0x84},
+ {PCIE_PHY_CMN_REG17E, 0x74},
+ {PCIE_PHY_CMN_REG17E, 0x70},
+ /* 15 */
+ {PCIE_PHY_CMN_REG17E, 0x78},
+ {PCIE_PHY_CMN_REG180, 0x24},
+ {PCIE_PHY_CMN_REG181, 0x85},
+ {PCIE_PHY_CMN_REG182, 0x80},
+ {PCIE_PHY_CMN_REG183, 0x7F},
+ {PCIE_PHY_CMN_REG184, 0x2D},
+ {PCIE_PHY_CMN_REG185, 0x34},
+ {PCIE_PHY_CMN_REG186, 0x24},
+ {PCIE_PHY_CMN_REG187, 0x05},
+ {PCIE_PHY_CMN_REG17E, 0x7C},
+ {PCIE_PHY_CMN_REG17E, 0x78},
+ /* 16 */
+ {PCIE_PHY_CMN_REG17E, 0x80},
+ {PCIE_PHY_CMN_REG181, 0x86},
+ {PCIE_PHY_CMN_REG17E, 0x84},
+ {PCIE_PHY_CMN_REG17E, 0x80},
+ /* 17 */
+ {PCIE_PHY_CMN_REG17E, 0x88},
+ {PCIE_PHY_CMN_REG181, 0x87},
+ {PCIE_PHY_CMN_REG17E, 0x8C},
+ {PCIE_PHY_CMN_REG17E, 0x88},
+ /* 18 */
+ {PCIE_PHY_CMN_REG17E, 0x90},
+ {PCIE_PHY_CMN_REG181, 0x88},
+ {PCIE_PHY_CMN_REG17E, 0x94},
+ {PCIE_PHY_CMN_REG17E, 0x90},
+ /* 19 */
+ {PCIE_PHY_CMN_REG17E, 0x98},
+ {PCIE_PHY_CMN_REG181, 0x89},
+ {PCIE_PHY_CMN_REG17E, 0x9C},
+ {PCIE_PHY_CMN_REG17E, 0x98},
+};
+
+
+static void artpec8_pcie_phy_reg_writel(void __iomem *base, u32 val, u32 reg)
+{
+ writel(val, base + reg);
+};
+
+static u32 artpec8_pcie_phy_reg_readl(void __iomem *base, u32 reg)
+{
+ return readl(base + reg);
+};
+
+static void artpec8_pcie_phy_reg_update(void __iomem *base, u32 mask,
+ u32 update, u32 reg)
+{
+ u32 val;
+
+ val = artpec8_pcie_phy_reg_readl(base, reg);
+ val &= ~(mask);
+ val |= update;
+ artpec8_pcie_phy_reg_writel(base, val, reg);
+};
+
+static void artpec8_pcie_enable_ref_clk_from_xo(struct artpec8_pcie_phy
+ *pciephy)
+{
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LCPLL_REFCLK_SEL,
+ REF_CLK_FROM_XO);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_ROPLL_REFCLK_SEL,
+ ROPLL_REFCLK_NOT_AVAILABLE);
+};
+
+static void artpec8_pcie_enable_ref_clk_from_io(struct artpec8_pcie_phy
+ *pciephy)
+{
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ PCIE_AUX_RX_MODE_EXTEND, 0,
+ PCIE_PHY_CMN_REG14D);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ ANA_AUX_EXT_REF_CLK_SEL, 0,
+ PCIE_PHY_CMN_REG0D9);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ AUX_PLL_EN_EXTEND, 0,
+ PCIE_PHY_CMN_REG10F);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ AUX2_PLL_EN_EXTEND, 0,
+ PCIE_PHY_CMN_REG11E);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ OV_S_ANA_AUX_EN, OV_S_ANA_AUX_EN,
+ PCIE_PHY_CMN_REG0D4);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ OV_I_ANA_AUX_EN, OV_I_ANA_AUX_EN,
+ PCIE_PHY_CMN_REG0D4);
+
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LCPLL_REFCLK_SEL,
+ REF_CLK_FROM_IO);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_ROPLL_REFCLK_SEL,
+ ROPLL_REFCLK_NOT_AVAILABLE);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LN0_REFCLK_PAD_EN,
+ PCIE_PHY_LN0_REFCLK_PAD_EN);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LN1_REFCLK_PAD_EN,
+ PCIE_PHY_LN1_REFCLK_PAD_EN);
+}
+
+static void artpec8_pcie_enable_ref_clk_from_soc_pll(struct artpec8_pcie_phy
+ *pciephy)
+{
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_LCPLL_REFCLK_SEL,
+ REF_CLK_FROM_SOC_PLL);
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_ROPLL_REFCLK_SEL,
+ ROPLL_REFCLK_NOT_AVAILABLE);
+}
+
+static void artpec8_pcie_lane_control(struct phy *phy, u32 lane0_reg, u32 mask,
+ u32 val)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+ u32 lanex_reg = lane0_reg;
+ int i;
+
+ if (lane0_reg < PCIE_PHY_LN0_REG_START ||
+ lane0_reg > PCIE_PHY_LN0_REG_END) {
+ return;
+ }
+
+ for (i = 0; i < pciephy->num_lanes; i++) {
+ lanex_reg += OFFSET_PER_LANE * i;
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, mask, val,
+ lanex_reg);
+ }
+}
+
+static void artpec8_pcie_phy_tune(struct artpec8_pcie_phy *pciephy)
+{
+ int i, count;
+
+ /* init cmn registers */
+ count = ARRAY_SIZE(cmn_regs);
+ for (i = 0; i < count; i++) {
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ cmn_regs[i].val,
+ cmn_regs[i].offset);
+ }
+
+ /* init lane registers */
+ count = ARRAY_SIZE(lane_regs);
+ for (i = 0; i < count; i++) {
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ lane_regs[i].val,
+ lane_regs[i].offset);
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ lane_regs[i].val,
+ lane_regs[i].offset +
+ OFFSET_PER_LANE);
+ }
+
+ /* rx preset registers */
+ count = ARRAY_SIZE(rx_preset_regs);
+ for (i = 0; i < count; i++) {
+ artpec8_pcie_phy_reg_writel(pciephy->phy_base,
+ rx_preset_regs[i].val,
+ rx_preset_regs[i].offset);
+ }
+}
+
+static int artpec8_pcie_phy_init(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ /* reset init_rstn and cmn_rstn */
+ artpec8_pcie_phy_reg_update(pciephy->phy_base,
+ OV_I_CMN_RSTN | OV_I_INIT_RSTN, 0, PCIE_PHY_CMN_REG101);
+
+ /* reference clock selection */
+ switch (pciephy->lcpll_ref_clk) {
+ case REF_CLK_FROM_XO:
+ artpec8_pcie_enable_ref_clk_from_xo(pciephy);
+ break;
+ case REF_CLK_FROM_IO:
+ artpec8_pcie_enable_ref_clk_from_io(pciephy);
+ break;
+ case REF_CLK_FROM_SOC_PLL:
+ artpec8_pcie_enable_ref_clk_from_soc_pll(pciephy);
+ break;
+ default:
+ break;
+ }
+
+ /* release i_init_rstn */
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, OV_I_INIT_RSTN,
+ OV_I_INIT_RSTN, PCIE_PHY_CMN_REG101);
+
+ /* phy initial settings */
+ artpec8_pcie_phy_tune(pciephy);
+
+ /* pll_en should be set to off when PM_STATE is P1.CPM */
+ if (!strncmp(pciephy->mode, "pcie_ep", strlen("pcie_ep"))) {
+ artpec8_pcie_phy_reg_update(pciephy->pcs_base, B1_DYNAMIC,
+ B1_DYNAMIC, PCIE_PCS_OUT_VEC_4);
+ }
+
+ /* disable lane eq ctrl rx data hold */
+ artpec8_pcie_lane_control(phy, PCIE_PHY_TRSV_REG2C0,
+ LN_EQ_CTRL_RX_DATA_HOLD, 0);
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_exit(struct phy *phy)
+{
+ return 0;
+}
+
+static int artpec8_pcie_phy_reset(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, OV_I_CMN_RSTN,
+ 0, PCIE_PHY_CMN_REG101);
+ udelay(10);
+ artpec8_pcie_phy_reg_update(pciephy->phy_base, OV_I_CMN_RSTN,
+ OV_I_CMN_RSTN, PCIE_PHY_CMN_REG101);
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_power_on(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_PWR_OFF, 0);
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_power_off(struct phy *phy)
+{
+ struct artpec8_pcie_phy *pciephy = phy_get_drvdata(phy);
+
+ regmap_update_bits(pciephy->sysreg, FSYS_PCIE_CON,
+ PCIE_PHY_PWR_OFF, PCIE_PHY_PWR_OFF);
+
+ return 0;
+}
+
+static int artpec8_pcie_phy_probe(struct platform_device *pdev)
+{
+ struct device *dev = &pdev->dev;
+ struct artpec8_pcie_phy *artpec8_phy;
+ struct phy *generic_phy;
+ struct phy_provider *phy_provider;
+ const struct artpec8_pcie_phy_data *drv_data;
+
+ drv_data = of_device_get_match_data(dev);
+ if (!drv_data)
+ return -ENODEV;
+
+ artpec8_phy = devm_kzalloc(dev, sizeof(*artpec8_phy), GFP_KERNEL);
+ if (!artpec8_phy)
+ return -ENOMEM;
+
+ /* reference clock */
+ if (of_property_read_u32(dev->of_node, "lcpll-ref-clk",
+ &artpec8_phy->lcpll_ref_clk)) {
+ return -EINVAL;
+ }
+ /* PLL SOC reference clock */
+ if (artpec8_phy->lcpll_ref_clk == REF_CLK_FROM_SOC_PLL) {
+ artpec8_phy->soc_pll_clk = devm_clk_get(dev, "ref_clk");
+ if (IS_ERR(artpec8_phy->soc_pll_clk))
+ return -EINVAL;
+ clk_prepare_enable(artpec8_phy->soc_pll_clk);
+ }
+
+ /* link mode */
+ if (of_property_read_string(dev->of_node, "mode", &artpec8_phy->mode))
+ return -EINVAL;
+
+ /* number of lanes */
+ if (of_property_read_u32(dev->of_node, "num-lanes",
+ &artpec8_phy->num_lanes))
+ return -EINVAL;
+
+ if (artpec8_phy->num_lanes > LANE_MAX)
+ return -EINVAL;
+
+ /* PHY base register */
+ artpec8_phy->phy_base = devm_platform_ioremap_resource_byname(pdev, "phy");
+ if (IS_ERR(artpec8_phy->phy_base))
+ return PTR_ERR(artpec8_phy->phy_base);
+
+ /* PCS base register */
+ artpec8_phy->pcs_base = devm_platform_ioremap_resource_byname(pdev, "pcs");
+ if (IS_ERR(artpec8_phy->pcs_base))
+ return PTR_ERR(artpec8_phy->pcs_base);
+
+ /* sysreg regmap handle, need to change using smc */
+ artpec8_phy->sysreg =
+ syscon_regmap_lookup_by_phandle(dev->of_node,
+ "samsung,fsys-sysreg");
+ if (IS_ERR(artpec8_phy->sysreg))
+ return PTR_ERR(artpec8_phy->sysreg);
+
+ artpec8_phy->drv_data = drv_data;
+
+ generic_phy = devm_phy_create(dev, dev->of_node, drv_data->ops);
+ if (IS_ERR(generic_phy))
+ return PTR_ERR(generic_phy);
+
+ phy_set_drvdata(generic_phy, artpec8_phy);
+ phy_provider = devm_of_phy_provider_register(dev, of_phy_simple_xlate);
+
+ if (IS_ERR(phy_provider))
+ return PTR_ERR(phy_provider);
+
+ return 0;
+}
+
+static int __exit artpec8_pcie_remove(struct platform_device *pdev)
+{
+ struct artpec8_pcie_phy *artpec8_phy = platform_get_drvdata(pdev);
+
+ if (artpec8_phy->soc_pll_clk)
+ clk_disable_unprepare(artpec8_phy->soc_pll_clk);
+
+ return 0;
+}
+
+static const struct phy_ops artpec8_phy_ops = {
+ .init = artpec8_pcie_phy_init,
+ .exit = artpec8_pcie_phy_exit,
+ .reset = artpec8_pcie_phy_reset,
+ .power_on = artpec8_pcie_phy_power_on,
+ .power_off = artpec8_pcie_phy_power_off,
+ .owner = THIS_MODULE,
+};
+
+static const struct artpec8_pcie_phy_data artpec8_pcie_phy_data = {
+ .ops = &artpec8_phy_ops,
+};
+
+static const struct of_device_id artpec8_pcie_phy_match[] = {
+ {
+ .compatible = "axis,artpec8-pcie-phy",
+ .data = &artpec8_pcie_phy_data,
+ },
+ {},
+};
+MODULE_DEVICE_TABLE(of, artpec8_pcie_phy_match);
+
+static struct platform_driver artpec8_pcie_phy_driver = {
+ .probe = artpec8_pcie_phy_probe,
+ .remove = __exit_p(artpec8_pcie_phy_remove),
+ .driver = {
+ .of_match_table = artpec8_pcie_phy_match,
+ .name = "artpec8_pcie_phy",
+ }
+};
+
+module_platform_driver(artpec8_pcie_phy_driver);
+
+MODULE_LICENSE("GPL");
+MODULE_AUTHOR("Jaeho Cho <jaeho79.cho@samsung.com>");
--
2.9.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* [PATCH v2 5/5] MAINTAINERS: Add maintainer for Axis ARTPEC-8 PCIe PHY driver
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p4>
@ 2022-06-03 2:43 ` Wangseok Lee
2022-06-03 16:09 ` Bjorn Helgaas
2022-06-08 3:31 ` [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver Wangseok Lee
1 sibling, 1 reply; 18+ messages in thread
From: Wangseok Lee @ 2022-06-03 2:43 UTC (permalink / raw)
To: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
Add maintainer for Axis ARTPEC-8 PCIe PHY.
Add Jesper Nilsson <jesper.nilsson@axis.com> and
Lars Persson <lars.persson@axis.com> as Maintainer for these files.
ARTPEC-8 is the SoC platform of Axis Communications
and PCIe phy is designed based on Samsung PHY.
Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
---
MAINTAINERS | 2 ++
1 file changed, 2 insertions(+)
diff --git a/MAINTAINERS b/MAINTAINERS
index d4d4aa2..cd6f75b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1864,12 +1864,14 @@ M: Jesper Nilsson <jesper.nilsson@axis.com>
M: Lars Persson <lars.persson@axis.com>
L: linux-arm-kernel@axis.com
S: Maintained
+F: Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
F: Documentation/devicetree/bindings/pinctrl/axis,artpec6-pinctrl.txt
F: arch/arm/boot/dts/artpec6*
F: arch/arm/mach-artpec
F: drivers/clk/axis
F: drivers/crypto/axis
F: drivers/mmc/host/usdhi6rol0.c
+F: drivers/phy/artpec/phy-artpec*
F: drivers/pinctrl/pinctrl-artpec*
ARM/ASPEED I2C DRIVER
--
2.9.5
^ permalink raw reply related [flat|nested] 18+ messages in thread
* Re: [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver
2022-06-03 2:34 ` [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver Wangseok Lee
@ 2022-06-03 16:03 ` Bjorn Helgaas
2022-06-07 7:03 ` Jesper Nilsson
2022-06-06 10:23 ` Krzysztof Kozlowski
1 sibling, 1 reply; 18+ messages in thread
From: Bjorn Helgaas @ 2022-06-03 16:03 UTC (permalink / raw)
To: Wangseok Lee
Cc: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson, bhelgaas, linux-phy, linux-pci, devicetree,
lorenzo.pieralisi, kw, linux-arm-kernel, kernel, Moon-Ki Jun,
Sang Min Kim, Dongjin Yang
In the subject, why do you tag this "axis"? There's an existing
pcie-artpec6.c that uses the driver name ""artpec6-pcie" and the
subject line tag "artpec6".
This adds pcie-artpec8.c with driver name "artpec8-pcie", so the
obvious choice would be "artpec8".
I assume you evaluated the possibility of extending artpec6 to support
artpec8 in addition to the artpec6 and artpec7 it already supports?
On Fri, Jun 03, 2022 at 11:34:52AM +0900, Wangseok Lee wrote:
> Add support Axis, ARTPEC-8 SoC.
> ARTPEC-8 is the SoC platform of Axis Communications.
> This is based on arm64 and support GEN4 & 2lane.
> This PCIe controller is based on DesignWare Hardware core
> and uses DesignWare core functions to implement the driver.
Add blank lines between paragraphs.
Wrap lines to fill 75 columns.
> changes since v1 :
> improvement review comment of Krzysztof on driver code.
> -debug messages for probe or other functions.
> -Inconsistent coding style (different indentation in structure members).
> -Inconsistent code (artpec8_pcie_get_subsystem_resources() gets device
> from pdev and from pci so you have two same pointers;
> or artpec8_pcie_get_ep_mem_resources() stores dev
> as local variable but uses instead pdev->dev).
> -Not using devm_platform_ioremap_resource().
> -Printing messages in interrupt handlers.
> -Several local/static structures or array are not const.
Thanks for the "changes since v1" notes. You can put them below the
"---" since there's no need for them in the permanent git commit log:
https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/Documentation/process/submitting-patches.rst?id=v5.18#n675
> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
Why is there no signoff from Jaeho Cho <jaeho79.cho@samsung.com>?
> ---
> drivers/pci/controller/dwc/Kconfig | 31 ++
> drivers/pci/controller/dwc/Makefile | 1 +
> drivers/pci/controller/dwc/pcie-artpec8.c | 864 ++++++++++++++++++++++++++++++
> 3 files changed, 896 insertions(+)
> create mode 100644 drivers/pci/controller/dwc/pcie-artpec8.c
>
> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> index 62ce3ab..4aa6da8 100644
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -222,6 +222,37 @@ config PCIE_ARTPEC6_EP
> Enables support for the PCIe controller in the ARTPEC-6 SoC to work in
> endpoint mode. This uses the DesignWare core.
>
> +config PCIE_ARTPEC8
> + bool "Axis ARTPEC-8 PCIe controller"
> +
> +config PCIE_ARTPEC8_HOST
> + bool "Axis ARTPEC-8 PCIe controller Host Mode"
> + depends on ARCH_ARTPEC
> + depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_ENDPOINT
> + select PCI_EPF_TEST
> + select PCIE_DW_HOST
> + select PCIE_ARTPEC8
> + help
> + Say 'Y' here to enable support for the PCIe controller in the
> + ARTPEC-8 SoC to work in host mode.
> + This PCIe controller is based on DesignWare Hardware core.
> + And uses DesignWare core functions to implement the driver.
Add blank line between paragraphs or rewrap as a single paragraph.
s/Hardware/hardware/
The last two sentences should be combined since the latter has no
verb:
This PCIe controller is based on the DesignWare hardware core and
uses DesignWare core functions to implement the driver.
> +config PCIE_ARTPEC8_EP
> + bool "Axis ARTPEC-8 PCIe controller Endpoint Mode"
> + depends on ARCH_ARTPEC
> + depends on PCI_ENDPOINT
> + depends on PCI_ENDPOINT_CONFIGFS
> + select PCI_EPF_TEST
> + select PCIE_DW_EP
> + select PCIE_ARTPEC8
> + help
> + Say 'Y' here to enable support for the PCIe controller in the
> + ARTPEC-8 SoC to work in endpoint mode.
> + This PCIe controller is based on DesignWare Hardware core.
> + And uses DesignWare core functions to implement the driver.
Same.
> config PCIE_ROCKCHIP_DW_HOST
> bool "Rockchip DesignWare PCIe controller"
> select PCIE_DW
> diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
> index 8ba7b67..b361022 100644
> --- a/drivers/pci/controller/dwc/Makefile
> +++ b/drivers/pci/controller/dwc/Makefile
> @@ -25,6 +25,7 @@ obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
> obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
> obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
> obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o
> +obj-$(CONFIG_PCIE_ARTPEC8) += pcie-artpec8.o
>
> # The following drivers are for devices that use the generic ACPI
> # pci_root.c driver but don't support standard ECAM config access.
> diff --git a/drivers/pci/controller/dwc/pcie-artpec8.c b/drivers/pci/controller/dwc/pcie-artpec8.c
> new file mode 100644
> index 0000000..d9ae9bf
> --- /dev/null
> +++ b/drivers/pci/controller/dwc/pcie-artpec8.c
> @@ -0,0 +1,864 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * PCIe controller driver for Axis ARTPEC-8 SoC
> + *
> + * Copyright (C) 2019 Samsung Electronics Co., Ltd.
> + * http://www.samsung.com
> + *
> + * Author: Jaeho Cho <jaeho79.cho@samsung.com>
> + * This file is based on driver/pci/controller/dwc/pci-exynos.c
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/module.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <linux/resource.h>
> +#include <linux/types.h>
> +#include <linux/phy/phy.h>
> +
> +#include "pcie-designware.h"
> +
> +#define to_artpec8_pcie(x) dev_get_drvdata((x)->dev)
> +
> +/* Gen3 Control Register */
> +#define PCIE_GEN3_RELATED_OFF 0x890
> +/* Disables equilzation feature */
s/equilzation/equalization/
Comment is probably unnecessary, since the name is so descriptive.
> +#define PCIE_GEN3_EQUALIZATION_DISABLE (0x1 << 16)
> +#define PCIE_GEN3_EQ_PHASE_2_3 (0x1 << 9)
> +#define PCIE_GEN3_RXEQ_PH01_EN (0x1 << 12)
> +#define PCIE_GEN3_RXEQ_RGRDLESS_RXTS (0x1 << 13)
> +
> +#define FAST_LINK_MODE (7)
> +
> +/* PCIe ELBI registers */
> +#define PCIE_IRQ0_STS 0x000
> +#define PCIE_IRQ1_STS 0x004
> +#define PCIE_IRQ2_STS 0x008
> +#define PCIE_IRQ5_STS 0x00C
> +#define PCIE_IRQ0_EN 0x010
> +#define PCIE_IRQ1_EN 0x014
> +#define PCIE_IRQ2_EN 0x018
> +#define PCIE_IRQ5_EN 0x01C
> +#define IRQ_MSI_ENABLE BIT(20)
> +#define PCIE_APP_LTSSM_ENABLE 0x054
> +#define PCIE_ELBI_LTSSM_ENABLE 0x1
> +#define PCIE_ELBI_CXPL_DEBUG_00_31 0x2C8
> +#define PCIE_ELBI_CXPL_DEBUG_32_63 0x2CC
> +#define PCIE_ELBI_SMLH_LINK_UP BIT(4)
> +#define PCIE_ARTPEC8_DEVICE_TYPE 0x080
> +#define DEVICE_TYPE_EP 0x0
> +#define DEVICE_TYPE_LEG_EP 0x1
> +#define DEVICE_TYPE_RC 0x4
> +#define PCIE_ELBI_SLV_AWMISC 0x828
> +#define PCIE_ELBI_SLV_ARMISC 0x820
> +#define PCIE_ELBI_SLV_DBI_ENABLE BIT(21)
> +#define LTSSM_STATE_MASK 0x3f
The previous hex constants used upper-case; this uses lower-case.
Pick one and stick with it.
This seems like a mix of register offsets and definitions of bits
within registers. It's confusing to mentally sort these out. Is
there any way to make this more obvious? Some drivers, e.g.,
pcie-artpec6.c, use "BIT(x)" and "GENMASK(x,y)" for bits within
registers.
> +#define LTSSM_STATE_L0 0x11
> +
> +/* FSYS SYSREG Offsets */
The list below seems to inclue more than just register offsets.
> +#define FSYS_PCIE_CON 0x424
> +#define PCIE_PERSTN BIT(5)
> +#define FSYS_PCIE_DBI_ADDR_CON 0x428
> +#define FSYS_PCIE_DBI_ADDR_OVR_CDM 0x00
> +#define FSYS_PCIE_DBI_ADDR_OVR_SHADOW 0x12
> +#define FSYS_PCIE_DBI_ADDR_OVR_ATU 0x36
> +
> +/* PMU SYSCON Offsets */
> +#define PMU_SYSCON_PCIE_ISOLATION 0x3200
> +
> +/* BUS P/S SYSCON Offsets */
> +#define BUS_SYSCON_BUS_PATH_ENABLE 0x0
> +
> +int artpec8_pcie_dbi_addr_con[] = {
> + FSYS_PCIE_DBI_ADDR_CON
> +};
> +
> +struct artpec8_pcie {
> + struct dw_pcie *pci;
> + struct clk *pipe_clk;
> + struct clk *dbi_clk;
> + struct clk *mstr_clk;
> + struct clk *slv_clk;
> + const struct artpec8_pcie_pdata *pdata;
> + void __iomem *elbi_base;
> + struct regmap *sysreg;
> + struct regmap *pmu_syscon;
> + struct regmap *bus_s_syscon;
> + struct regmap *bus_p_syscon;
> + enum dw_pcie_device_mode mode;
> + int link_id;
> + /* For Generic PHY Framework */
Superfluous comment.
> + struct phy *phy;
> +};
> +
> +struct artpec8_pcie_res_ops {
> + int (*get_mem_resources)(struct platform_device *pdev,
> + struct artpec8_pcie *artpec8_ctrl);
> + int (*get_clk_resources)(struct platform_device *pdev,
> + struct artpec8_pcie *artpec8_ctrl);
> + int (*init_clk_resources)(struct artpec8_pcie *artpec8_ctrl);
> + void (*deinit_clk_resources)(struct artpec8_pcie *artpec8_ctrl);
> +};
> +
> +struct artpec8_pcie_pdata {
> + const struct dw_pcie_ops *dwc_ops;
> + const struct dw_pcie_host_ops *host_ops;
Fix indentation to match surrounding code.
> + const struct artpec8_pcie_res_ops *res_ops;
> + enum dw_pcie_device_mode mode;
> +};
> +
> +enum artpec8_pcie_isolation {
> + PCIE_CLEAR_ISOLATION = 0,
> + PCIE_SET_ISOLATION = 1
> +};
> +
> +enum artpec8_pcie_reg_bit {
> + PCIE_REG_BIT_LOW = 0,
> + PCIE_REG_BIT_HIGH = 1
> +};
> +
> +static void artpec8_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, size_t size, u32 val);
> +static u32 artpec8_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, size_t size);
> +static void artpec8_pcie_writel(void __iomem *base, u32 val, u32 reg);
Can you reorder the function definitions to avoid the need for these
forward declarations?
> +static int artpec8_pcie_get_subsystem_resources(struct platform_device *pdev,
> + struct artpec8_pcie *artpec8_ctrl)
> +{
> + struct device *dev = &pdev->dev;
> +
> + /* External Local Bus interface(ELBI) Register */
> + artpec8_ctrl->elbi_base = devm_platform_ioremap_resource_byname(pdev, "elbi");
Rewrap to fit in 80 columns.
> + if (IS_ERR(artpec8_ctrl->elbi_base)) {
> + dev_err(dev, "failed to map elbi_base\n");
> + return PTR_ERR(artpec8_ctrl->elbi_base);
> + }
> +
> + /* fsys sysreg regmap handle */
All these comments are superfluous since they only repeat the lookup
arguments.
> + artpec8_ctrl->sysreg =
> + syscon_regmap_lookup_by_phandle(dev->of_node,
The above two lines should fit on one line.
> + "samsung,fsys-sysreg");
> + if (IS_ERR(artpec8_ctrl->sysreg)) {
> + dev_err(dev, "fsys sysreg regmap lookup failed.\n");
> + return PTR_ERR(artpec8_ctrl->sysreg);
> + }
> +
> + /* pmu syscon regmap handle */
> + artpec8_ctrl->pmu_syscon = syscon_regmap_lookup_by_phandle(dev->of_node,
> + "samsung,syscon-phandle");
> + if (IS_ERR(artpec8_ctrl->pmu_syscon)) {
> + dev_err(dev, "pmu syscon regmap lookup failed.\n");
> + return PTR_ERR(artpec8_ctrl->pmu_syscon);
> + }
> +
> + /* bus s syscon regmap handle */
> + artpec8_ctrl->bus_s_syscon =
> + syscon_regmap_lookup_by_phandle(dev->of_node,
> + "samsung,syscon-bus-s-fsys");
> + if (IS_ERR(artpec8_ctrl->bus_s_syscon)) {
> + dev_err(dev, "bus_s_syscon regmap lookup failed.\n");
> + return PTR_ERR(artpec8_ctrl->bus_s_syscon);
> + }
> +
> + /* bus p syscon regmap handle */
> + artpec8_ctrl->bus_p_syscon =
> + syscon_regmap_lookup_by_phandle(dev->of_node,
> + "samsung,syscon-bus-p-fsys");
> + if (IS_ERR(artpec8_ctrl->bus_p_syscon)) {
> + dev_err(dev, "bus_p_syscon regmap lookup failed.\n");
> + return PTR_ERR(artpec8_ctrl->bus_p_syscon);
> + }
> +
> + return 0;
> +}
> +
> +static int artpec8_pcie_get_rc_mem_resources(struct platform_device *pdev,
> + struct artpec8_pcie *artpec8_ctrl)
> +{
> + struct dw_pcie *pci = artpec8_ctrl->pci;
> +
> + /* Data Bus Interface(DBI) Register */
> + pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> + if (IS_ERR(pci->dbi_base))
> + return PTR_ERR(pci->dbi_base);
> +
> + return 0;
> +}
> +
> +static int artpec8_pcie_get_ep_mem_resources(struct platform_device *pdev,
> + struct artpec8_pcie *artpec8_ctrl)
> +{
> + struct dw_pcie_ep *ep;
> + struct dw_pcie *pci = artpec8_ctrl->pci;
> + struct device *dev = &pdev->dev;
> + struct resource *res;
> +
> + ep = &pci->ep;
Reorder the locals above:
struct dw_pcie *pci = artpec8_ctrl->pci;
struct device *dev = &pdev->dev;
struct dw_pcie_ep *ep = &pci->ep;
struct resource *res;
Then they're in the order you use them and you don't need the extra
"ep = &pci->ep".
> + pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> + if (IS_ERR(pci->dbi_base)) {
> + dev_err(dev, "failed to map ep_dbics\n");
> + return -ENOMEM;
> + }
> +
> + pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
> + if (IS_ERR(pci->dbi_base2)) {
> + dev_err(dev, "failed to map ep_dbics2\n");
> + return -ENOMEM;
> + }
> +
> + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
> + if (!res)
> + return -EINVAL;
> + ep->phys_base = res->start;
> + ep->addr_size = resource_size(res);
> +
> + return 0;
> +}
> +
> +static int artpec8_pcie_get_clk_resources(struct platform_device *pdev,
> + struct artpec8_pcie *artpec8_ctrl)
> +{
> + struct device *dev = &pdev->dev;
> +
> + artpec8_ctrl->pipe_clk = devm_clk_get(dev, "pipe_clk");
> + if (IS_ERR(artpec8_ctrl->pipe_clk)) {
> + dev_err(dev, "couldn't get pipe clock\n");
> + return -EINVAL;
> + }
> +
> + artpec8_ctrl->dbi_clk = devm_clk_get(dev, "dbi_clk");
> + if (IS_ERR(artpec8_ctrl->dbi_clk)) {
> + dev_info(dev, "couldn't get dbi clk\n");
> + return -EINVAL;
> + }
> +
> + artpec8_ctrl->slv_clk = devm_clk_get(dev, "slv_clk");
> + if (IS_ERR(artpec8_ctrl->slv_clk)) {
> + dev_err(dev, "couldn't get slave clock\n");
> + return -EINVAL;
> + }
> +
> + artpec8_ctrl->mstr_clk = devm_clk_get(dev, "mstr_clk");
> + if (IS_ERR(artpec8_ctrl->mstr_clk)) {
> + dev_info(dev, "couldn't get master clk\n");
It'd be nice if the err/info messages matched the exact DT name:
"pipe_clk", "dbi_clk", slv_clk", etc.
Why are some of the above dev_err() and others dev_info() when you
return -EINVAL in all cases?
> + return -EINVAL;
> + }
> +
> + return 0;
> +}
> +
> +static int artpec8_pcie_init_clk_resources(struct artpec8_pcie *artpec8_ctrl)
> +{
> + clk_prepare_enable(artpec8_ctrl->pipe_clk);
> + clk_prepare_enable(artpec8_ctrl->dbi_clk);
> + clk_prepare_enable(artpec8_ctrl->mstr_clk);
> + clk_prepare_enable(artpec8_ctrl->slv_clk);
> +
> + return 0;
> +}
> +
> +static void artpec8_pcie_deinit_clk_resources(struct artpec8_pcie *artpec8_ctrl)
> +{
> + clk_disable_unprepare(artpec8_ctrl->slv_clk);
> + clk_disable_unprepare(artpec8_ctrl->mstr_clk);
> + clk_disable_unprepare(artpec8_ctrl->dbi_clk);
> + clk_disable_unprepare(artpec8_ctrl->pipe_clk);
> +}
> +
> +static const struct artpec8_pcie_res_ops artpec8_pcie_rc_res_ops = {
> + .get_mem_resources = artpec8_pcie_get_rc_mem_resources,
> + .get_clk_resources = artpec8_pcie_get_clk_resources,
> + .init_clk_resources = artpec8_pcie_init_clk_resources,
> + .deinit_clk_resources = artpec8_pcie_deinit_clk_resources,
> +};
> +
> +static const struct artpec8_pcie_res_ops artpec8_pcie_ep_res_ops = {
> + .get_mem_resources = artpec8_pcie_get_ep_mem_resources,
> + .get_clk_resources = artpec8_pcie_get_clk_resources,
> + .init_clk_resources = artpec8_pcie_init_clk_resources,
> + .deinit_clk_resources = artpec8_pcie_deinit_clk_resources,
> +};
> +
> +static void artpec8_pcie_writel(void __iomem *base, u32 val, u32 reg)
> +{
> + writel(val, base + reg);
> +}
> +
> +static u32 artpec8_pcie_readl(void __iomem *base, u32 reg)
> +{
> + return readl(base + reg);
> +}
> +
> +static int artpec8_pcie_config_phy_power_isolation(struct dw_pcie *pci,
> + enum artpec8_pcie_reg_bit val)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + int ret;
> +
> + ret = regmap_write(artpec8_ctrl->pmu_syscon, PMU_SYSCON_PCIE_ISOLATION,
> + val);
> +
> + return ret;
return regmap_write(artpec8_ctrl->pmu_syscon, ...);
> +}
> +
> +static int artpec8_pcie_config_bus_enable(struct dw_pcie *pci,
> + enum artpec8_pcie_reg_bit val)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + int ret;
> +
> + ret = regmap_write(artpec8_ctrl->bus_p_syscon,
> + BUS_SYSCON_BUS_PATH_ENABLE, val);
> + if (ret)
> + return ret;
> +
> + ret = regmap_write(artpec8_ctrl->bus_s_syscon,
> + BUS_SYSCON_BUS_PATH_ENABLE, val);
> + if (ret)
> + return ret;
> +
> + return ret;
return regmap_write(artpec8_ctrl->bus_s_syscon, ...);
> +}
> +
> +static int artpec8_pcie_config_isolation(struct dw_pcie *pci,
> + enum artpec8_pcie_isolation val)
> +{
> + int ret;
> + /* reg_val[0] : for phy power isolation */
> + /* reg_val[1] : for bus enable */
> + enum artpec8_pcie_reg_bit reg_val[2];
> +
> + switch (val) {
> + case PCIE_CLEAR_ISOLATION:
> + reg_val[0] = PCIE_REG_BIT_LOW;
> + reg_val[1] = PCIE_REG_BIT_HIGH;
> + break;
> + case PCIE_SET_ISOLATION:
> + reg_val[0] = PCIE_REG_BIT_HIGH;
> + reg_val[1] = PCIE_REG_BIT_LOW;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = artpec8_pcie_config_phy_power_isolation(pci, reg_val[0]);
> + if (ret)
> + return ret;
> +
> + ret = artpec8_pcie_config_bus_enable(pci, reg_val[1]);
> + if (ret)
> + return ret;
> +
> + return ret;
return artpec8_pcie_config_bus_enable(pci, ...);
> +}
> +
> +static int artpec8_pcie_config_perstn(struct dw_pcie *pci,
> + enum artpec8_pcie_reg_bit val)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + unsigned int bits;
> + int ret;
> +
> + if (val == PCIE_REG_BIT_HIGH)
> + bits = PCIE_PERSTN;
> + else
> + bits = 0;
> +
> + ret = regmap_update_bits(artpec8_ctrl->sysreg, FSYS_PCIE_CON,
> + PCIE_PERSTN, bits);
> +
> + return ret;
return regmap_update_bits(artpec8_ctrl->sysreg, ...):
> +}
> +
> +static void artpec8_pcie_stop_link(struct dw_pcie *pci)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + u32 val;
> +
> + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
> + PCIE_APP_LTSSM_ENABLE);
> +
> + val &= ~PCIE_ELBI_LTSSM_ENABLE;
> + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
> + PCIE_APP_LTSSM_ENABLE);
> +}
> +
> +static int artpec8_pcie_start_link(struct dw_pcie *pci)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + u32 val;
> +
> + dw_pcie_dbi_ro_wr_en(pci);
> +
> + /* Equalization disable */
> + val = artpec8_pcie_read_dbi(pci, pci->dbi_base, PCIE_GEN3_RELATED_OFF,
> + 4);
> + artpec8_pcie_write_dbi(pci, pci->dbi_base, PCIE_GEN3_RELATED_OFF, 4,
> + val | PCIE_GEN3_EQUALIZATION_DISABLE);
> +
> + dw_pcie_dbi_ro_wr_dis(pci);
> +
> + /* assert LTSSM enable */
> + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
> + PCIE_APP_LTSSM_ENABLE);
> +
> + val |= PCIE_ELBI_LTSSM_ENABLE;
> + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
> + PCIE_APP_LTSSM_ENABLE);
> +
> + return 0;
> +}
> +
> +static irqreturn_t artpec8_pcie_msi_irq_handler(int irq, void *arg)
> +{
> + struct artpec8_pcie *artpec8_ctrl = arg;
> + struct dw_pcie *pci = artpec8_ctrl->pci;
> + struct pcie_port *pp = &pci->pp;
> + u32 val;
> +
> + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base, PCIE_IRQ2_STS);
> +
> + if ((val & IRQ_MSI_ENABLE) == IRQ_MSI_ENABLE) {
> + val &= IRQ_MSI_ENABLE;
> + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
> + PCIE_IRQ2_STS);
> + dw_handle_msi_irq(pp);
> + }
> +
> + return IRQ_HANDLED;
> +}
> +
> +static void artpec8_pcie_msi_init(struct artpec8_pcie *artpec8_ctrl)
> +{
> + u32 val;
> +
> + /* enable MSI interrupt */
> + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base, PCIE_IRQ2_EN);
> + val |= IRQ_MSI_ENABLE;
> + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val, PCIE_IRQ2_EN);
> +}
> +
> +static void artpec8_pcie_enable_interrupts(struct artpec8_pcie *artpec8_ctrl)
> +{
> + if (IS_ENABLED(CONFIG_PCI_MSI))
> + artpec8_pcie_msi_init(artpec8_ctrl);
> +}
> +
> +static u32 artpec8_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, size_t size)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + u32 val;
> + bool is_atu = false;
> +
> + if (base == pci->atu_base) {
> + is_atu = true;
> + base = pci->dbi_base;
> + regmap_write(artpec8_ctrl->sysreg,
> + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> + FSYS_PCIE_DBI_ADDR_OVR_ATU);
> + }
> +
> + dw_pcie_read(base + reg, size, &val);
> +
> + if (is_atu)
> + regmap_write(artpec8_ctrl->sysreg,
> + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> + FSYS_PCIE_DBI_ADDR_OVR_CDM);
> +
> + return val;
> +}
> +
> +static void artpec8_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, size_t size, u32 val)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + bool is_atu = false;
> +
> + if (base == pci->atu_base) {
> + is_atu = true;
> + base = pci->dbi_base;
> + regmap_write(artpec8_ctrl->sysreg,
> + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> + FSYS_PCIE_DBI_ADDR_OVR_ATU);
> + }
> +
> + dw_pcie_write(base + reg, size, val);
> +
> + if (is_atu)
> + regmap_write(artpec8_ctrl->sysreg,
> + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> + FSYS_PCIE_DBI_ADDR_OVR_CDM);
> +}
> +
> +static void artpec8_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base,
> + u32 reg, size_t size, u32 val)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> +
> + regmap_write(artpec8_ctrl->sysreg,
> + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> + FSYS_PCIE_DBI_ADDR_OVR_SHADOW);
> +
> + dw_pcie_write(base + reg, size, val);
> +
> + regmap_write(artpec8_ctrl->sysreg,
> + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> + FSYS_PCIE_DBI_ADDR_OVR_CDM);
> +}
> +
> +static int artpec8_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn,
> + int where, int size, u32 *val)
> +{
> + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
> +
> + if (PCI_SLOT(devfn)) {
> + *val = ~0;
PCI_SET_ERROR_RESPONSE(val);
> + return PCIBIOS_DEVICE_NOT_FOUND;
> + }
> +
> + *val = dw_pcie_read_dbi(pci, where, size);
> + return PCIBIOS_SUCCESSFUL;
> +}
> +
> +static int artpec8_pcie_wr_own_conf(struct pci_bus *bus, unsigned int devfn,
> + int where, int size, u32 val)
> +{
> + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
> +
> + if (PCI_SLOT(devfn))
> + return PCIBIOS_DEVICE_NOT_FOUND;
> +
> + dw_pcie_write_dbi(pci, where, size, val);
> + return PCIBIOS_SUCCESSFUL;
> +}
> +
> +static struct pci_ops artpec8_pci_ops = {
> + .read = artpec8_pcie_rd_own_conf,
> + .write = artpec8_pcie_wr_own_conf,
> +};
> +
> +static int artpec8_pcie_link_up(struct dw_pcie *pci)
> +{
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> + u32 val;
> +
> + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
> + PCIE_ELBI_CXPL_DEBUG_00_31);
> +
> + return (val & LTSSM_STATE_MASK) == LTSSM_STATE_L0;
> +}
> +
> +static int artpec8_pcie_host_init(struct pcie_port *pp)
> +{
> + struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> +
> + pp->bridge->ops = &artpec8_pci_ops;
> +
> + dw_pcie_writel_dbi(pci, PCIE_GEN3_RELATED_OFF,
> + (PCIE_GEN3_EQ_PHASE_2_3 |
> + PCIE_GEN3_RXEQ_PH01_EN |
> + PCIE_GEN3_RXEQ_RGRDLESS_RXTS));
> +
> + artpec8_pcie_enable_interrupts(artpec8_ctrl);
> +
> + return 0;
> +}
> +
> +static const struct dw_pcie_host_ops artpec8_pcie_host_ops = {
> + .host_init = artpec8_pcie_host_init,
> +};
> +
> +static u8 artpec8_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
> +{
> + u32 val;
> +
> + val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
> + pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET;
> +
> + if (val == 0xffffffff)
> + return 1;
> +
> + return 0;
> +}
> +
> +static void artpec8_pcie_ep_init(struct dw_pcie_ep *ep)
> +{
> + struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> + enum pci_barno bar;
Add blank line here and use usual multi-line comment style:
/*
* Currently PCIe EP core is not ...
> + /* Currently PCIe EP core is not setting iatu_unroll_enabled
> + * so let's handle it here. We need to find proper place to
> + * initialize this so that it can be used as for other EP
... can be used for ...
> + * controllers as well.
> + */
> + pci->iatu_unroll_enabled = artpec8_pcie_iatu_unroll_enabled(pci);
> +
> + for (bar = BAR_0; bar <= BAR_5; bar++)
> + dw_pcie_ep_reset_bar(pci, bar);
> +}
> +
> +static int artpec8_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
> + enum pci_epc_irq_type type, u16 interrupt_num)
> +{
> + struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> +
> + switch (type) {
> + case PCI_EPC_IRQ_LEGACY:
> + return -EINVAL;
> + case PCI_EPC_IRQ_MSI:
> + return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
> + default:
> + dev_err(pci->dev, "UNKNOWN IRQ type\n");
> + }
> +
> + return 0;
> +}
> +
> +static const struct pci_epc_features artpec8_pcie_epc_features = {
> + .linkup_notifier = false,
> + .msi_capable = true,
> + .msix_capable = false,
> +};
> +
> +static const struct pci_epc_features*
> +artpec8_pcie_ep_get_features(struct dw_pcie_ep *ep)
> +{
> + return &artpec8_pcie_epc_features;
> +}
> +
> +static const struct dw_pcie_ep_ops artpec8_dw_pcie_ep_ops = {
> + .ep_init = artpec8_pcie_ep_init,
> + .raise_irq = artpec8_pcie_raise_irq,
> + .get_features = artpec8_pcie_ep_get_features,
> +};
> +
> +static int __init artpec8_add_pcie_ep(struct artpec8_pcie *artpec8_ctrl,
> + struct platform_device *pdev)
> +{
> + int ret;
> + struct dw_pcie_ep *ep;
> + struct dw_pcie *pci = artpec8_ctrl->pci;
> +
> + ep = &pci->ep;
Reorder locals and initialize ep as above.
> + ep->ops = &artpec8_dw_pcie_ep_ops;
> +
> + dw_pcie_writel_dbi(pci, PCIE_GEN3_RELATED_OFF,
> + (PCIE_GEN3_EQ_PHASE_2_3 |
> + PCIE_GEN3_RXEQ_PH01_EN |
> + PCIE_GEN3_RXEQ_RGRDLESS_RXTS));
> +
> + ret = dw_pcie_ep_init(ep);
> + if (ret)
> + return ret;
> +
> + return 0;
> +}
> +
> +static int __init artpec8_add_pcie_port(struct artpec8_pcie *artpec8_ctrl,
> + struct platform_device *pdev)
> +{
> + struct dw_pcie *pci = artpec8_ctrl->pci;
> + struct pcie_port *pp = &pci->pp;
> + struct device *dev = &pdev->dev;
> + int ret;
> + int irq_flags;
> + int irq;
Reorder to be in order of use:
struct dw_pcie *pci = artpec8_ctrl->pci;
struct pcie_port *pp = &pci->pp;
struct device *dev = &pdev->dev;
int irq;
int irq_flags;
int ret;
> +
> + if (IS_ENABLED(CONFIG_PCI_MSI)) {
> + irq = platform_get_irq_byname(pdev, "intr");
> + if (!irq)
> + return -ENODEV;
> +
> + irq_flags = IRQF_SHARED | IRQF_NO_THREAD;
> +
> + ret = devm_request_irq(dev, irq, artpec8_pcie_msi_irq_handler,
> + irq_flags, "artpec8-pcie", artpec8_ctrl);
> + if (ret)
> + return ret;
> + }
> +
> + /* Prevent core for messing with the IRQ, since it's muxed */
Prevent core from ...
> + pp->msi_irq = -ENODEV;
> +
> + ret = dw_pcie_host_init(pp);
> + if (ret)
> + return ret;
> +
> + return 0;
return dw_pcie_host_init(pp);
> +}
> +
> +static const struct dw_pcie_ops artpec8_dw_pcie_ops = {
> + .read_dbi = artpec8_pcie_read_dbi,
> + .write_dbi = artpec8_pcie_write_dbi,
> + .write_dbi2 = artpec8_pcie_write_dbi2,
> + .start_link = artpec8_pcie_start_link,
> + .stop_link = artpec8_pcie_stop_link,
> + .link_up = artpec8_pcie_link_up,
> +};
> +
> +static int artpec8_pcie_probe(struct platform_device *pdev)
> +{
> + int ret;
> + struct dw_pcie *pci;
> + struct pcie_port *pp;
> + struct artpec8_pcie *artpec8_ctrl;
> + enum dw_pcie_device_mode mode;
> + struct device *dev = &pdev->dev;
> + const struct artpec8_pcie_pdata *pdata;
> + struct device_node *np = dev->of_node;
Reorder in order of use.
> + artpec8_ctrl = devm_kzalloc(dev, sizeof(*artpec8_ctrl), GFP_KERNEL);
> + if (!artpec8_ctrl)
> + return -ENOMEM;
> +
> + pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
> + if (!pci)
> + return -ENOMEM;
> +
> + pdata = (const struct artpec8_pcie_pdata *)
Unnecessary cast.
> + of_device_get_match_data(dev);
> + if (!pdata)
> + return -ENODEV;
> +
> + mode = (enum dw_pcie_device_mode)pdata->mode;
> +
> + artpec8_ctrl->pci = pci;
> + artpec8_ctrl->pdata = pdata;
> + artpec8_ctrl->mode = mode;
> +
> + pci->dev = dev;
> + pci->ops = pdata->dwc_ops;
> + pci->dbi_base2 = NULL;
> + pci->dbi_base = NULL;
> + pp = &pci->pp;
> + pp->ops = artpec8_ctrl->pdata->host_ops;
> +
> + if (mode == DW_PCIE_RC_TYPE)
> + artpec8_ctrl->link_id = of_alias_get_id(np, "pcierc");
> + else
> + artpec8_ctrl->link_id = of_alias_get_id(np, "pcieep");
> +
> + ret = artpec8_pcie_get_subsystem_resources(pdev, artpec8_ctrl);
> + if (ret)
> + return ret;
> +
> + if (pdata->res_ops && pdata->res_ops->get_mem_resources) {
> + ret = pdata->res_ops->get_mem_resources(pdev, artpec8_ctrl);
> + if (ret)
> + return ret;
> + }
> +
> + if (pdata->res_ops && pdata->res_ops->get_clk_resources) {
> + ret = pdata->res_ops->get_clk_resources(pdev, artpec8_ctrl);
> + if (ret)
> + return ret;
> +
> + ret = pdata->res_ops->init_clk_resources(artpec8_ctrl);
> + if (ret)
> + return ret;
> + }
> +
> + platform_set_drvdata(pdev, artpec8_ctrl);
> +
> + ret = artpec8_pcie_config_isolation(pci, PCIE_CLEAR_ISOLATION);
> + if (ret)
> + return ret;
> +
> + ret = artpec8_pcie_config_perstn(pci, PCIE_REG_BIT_HIGH);
> + if (ret)
> + return ret;
> +
> + artpec8_ctrl->phy = devm_of_phy_get(dev, np, NULL);
> + if (IS_ERR(artpec8_ctrl->phy))
> + return PTR_ERR(artpec8_ctrl->phy);
> +
> + phy_init(artpec8_ctrl->phy);
> + phy_reset(artpec8_ctrl->phy);
> +
> + switch (mode) {
> + case DW_PCIE_RC_TYPE:
> + artpec8_pcie_writel(artpec8_ctrl->elbi_base, DEVICE_TYPE_RC,
> + PCIE_ARTPEC8_DEVICE_TYPE);
> + ret = artpec8_add_pcie_port(artpec8_ctrl, pdev);
> + if (ret < 0)
Are there positive return values that indicate success? Most places
above you assume "ret != 0" means failure, so just curious why you
test "ret < 0" instead of just "ret".
> + goto fail_probe;
> + break;
> + case DW_PCIE_EP_TYPE:
> + artpec8_pcie_writel(artpec8_ctrl->elbi_base, DEVICE_TYPE_EP,
> + PCIE_ARTPEC8_DEVICE_TYPE);
> +
> + ret = artpec8_add_pcie_ep(artpec8_ctrl, pdev);
> + if (ret < 0)
Same question.
> + goto fail_probe;
> + break;
> + default:
> + ret = -EINVAL;
> + goto fail_probe;
> + }
> +
> + return 0;
> +
> +fail_probe:
> + phy_exit(artpec8_ctrl->phy);
> + if (pdata->res_ops && pdata->res_ops->deinit_clk_resources)
> + pdata->res_ops->deinit_clk_resources(artpec8_ctrl);
> +
> + return ret;
> +}
> +
> +static int __exit artpec8_pcie_remove(struct platform_device *pdev)
> +{
> + struct artpec8_pcie *artpec8_ctrl = platform_get_drvdata(pdev);
> + const struct artpec8_pcie_pdata *pdata = artpec8_ctrl->pdata;
> +
> + if (pdata->res_ops && pdata->res_ops->deinit_clk_resources)
> + pdata->res_ops->deinit_clk_resources(artpec8_ctrl);
> +
> + return 0;
> +}
> +
> +static const struct artpec8_pcie_pdata artpec8_pcie_rc_pdata = {
> + .dwc_ops = &artpec8_dw_pcie_ops,
> + .host_ops = &artpec8_pcie_host_ops,
> + .res_ops = &artpec8_pcie_rc_res_ops,
> + .mode = DW_PCIE_RC_TYPE,
> +};
> +
> +static const struct artpec8_pcie_pdata artpec8_pcie_ep_pdata = {
> + .dwc_ops = &artpec8_dw_pcie_ops,
> + .host_ops = &artpec8_pcie_host_ops,
> + .res_ops = &artpec8_pcie_ep_res_ops,
> + .mode = DW_PCIE_EP_TYPE,
> +};
> +
> +static const struct of_device_id artpec8_pcie_of_match[] = {
> + {
> + .compatible = "axis,artpec8-pcie",
> + .data = &artpec8_pcie_rc_pdata,
> + },
> + {
> + .compatible = "axis,artpec8-pcie-ep",
> + .data = &artpec8_pcie_ep_pdata,
> + },
> + {},
> +};
> +MODULE_DEVICE_TABLE(of, artpec8_pcie_of_match);
> +
> +static struct platform_driver artpec8_pcie_driver = {
> + .probe = artpec8_pcie_probe,
> + .remove = __exit_p(artpec8_pcie_remove),
> + .driver = {
> + .name = "artpec8-pcie",
> + .of_match_table = artpec8_pcie_of_match,
> + },
> +};
> +
> +module_platform_driver(artpec8_pcie_driver);
> +
> +MODULE_LICENSE("GPL");
> +MODULE_AUTHOR("Jaeho Cho <jaeho79.cho@samsung.com>");
> --
> 2.9.5
>
> --
> linux-phy mailing list
> linux-phy@lists.infradead.org
> https://lists.infradead.org/mailman/listinfo/linux-phy
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 5/5] MAINTAINERS: Add maintainer for Axis ARTPEC-8 PCIe PHY driver
2022-06-03 2:43 ` [PATCH v2 5/5] MAINTAINERS: Add maintainer for Axis " Wangseok Lee
@ 2022-06-03 16:09 ` Bjorn Helgaas
2022-06-07 7:05 ` Jesper Nilsson
0 siblings, 1 reply; 18+ messages in thread
From: Bjorn Helgaas @ 2022-06-03 16:09 UTC (permalink / raw)
To: Wangseok Lee
Cc: robh+dt, krzk+dt, kishon, vkoul, linux-kernel, jesper.nilsson,
lars.persson, bhelgaas, linux-phy, linux-pci, devicetree,
lorenzo.pieralisi, kw, linux-arm-kernel, kernel, Moon-Ki Jun,
Sang Min Kim, Dongjin Yang
In subject:
MAINTAINERS: Add Axis ARTPEC-8 PCIe PHY maintainers
to put the important things first so they don't get chopped off by
"git log --oneline" and similar.
On Fri, Jun 03, 2022 at 11:43:47AM +0900, Wangseok Lee wrote:
> Add maintainer for Axis ARTPEC-8 PCIe PHY.
>
> Add Jesper Nilsson <jesper.nilsson@axis.com> and
> Lars Persson <lars.persson@axis.com> as Maintainer for these files.
s/Maintainer/maintainers/
> ARTPEC-8 is the SoC platform of Axis Communications
> and PCIe phy is designed based on Samsung PHY.
s/phy/PHY/ to match other uses.
Rewrap all of above to fill 75 columns.
> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
Obviously we'll look for acks from Jesper and Lars.
Also would be good if Jesper explicitly acked the fact that his
existing "PCIE DRIVER FOR AXIS ARTPEC" entry also matches the new
pcie-artpec8.c driver:
PCIE DRIVER FOR AXIS ARTPEC
M: Jesper Nilsson <jesper.nilsson@axis.com>
L: linux-arm-kernel@axis.com
L: linux-pci@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/pci/axis,artpec*
F: drivers/pci/controller/dwc/*artpec*
> ---
> MAINTAINERS | 2 ++
> 1 file changed, 2 insertions(+)
>
> diff --git a/MAINTAINERS b/MAINTAINERS
> index d4d4aa2..cd6f75b 100644
> --- a/MAINTAINERS
> +++ b/MAINTAINERS
> @@ -1864,12 +1864,14 @@ M: Jesper Nilsson <jesper.nilsson@axis.com>
> M: Lars Persson <lars.persson@axis.com>
> L: linux-arm-kernel@axis.com
> S: Maintained
> +F: Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
> F: Documentation/devicetree/bindings/pinctrl/axis,artpec6-pinctrl.txt
> F: arch/arm/boot/dts/artpec6*
> F: arch/arm/mach-artpec
> F: drivers/clk/axis
> F: drivers/crypto/axis
> F: drivers/mmc/host/usdhi6rol0.c
> +F: drivers/phy/artpec/phy-artpec*
> F: drivers/pinctrl/pinctrl-artpec*
>
> ARM/ASPEED I2C DRIVER
> --
> 2.9.5
>
> --
> linux-phy mailing list
> linux-phy@lists.infradead.org
> https://lists.infradead.org/mailman/listinfo/linux-phy
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller
2022-06-03 2:23 ` [PATCH v2 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller Wangseok Lee
@ 2022-06-06 10:12 ` Krzysztof Kozlowski
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p8>
1 sibling, 0 replies; 18+ messages in thread
From: Krzysztof Kozlowski @ 2022-06-06 10:12 UTC (permalink / raw)
To: wangseok.lee, robh+dt, krzk+dt, kishon, vkoul, linux-kernel,
jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
On 03/06/2022 04:23, Wangseok Lee wrote:
> Add description to support Axis, ARTPEC-8 SoC.
> ARTPEC-8 is the SoC platform of Axis Communications
> and PCIe controller is designed based on Design-Ware PCIe controller.
>
> changes since v1 :
Changelog goes after --- .
> -'make dt_binding_check' result improvement
> -Add the missing property list
> -Align the indentation of continued lines/entries
>
> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
> ---
> .../bindings/pci/axis,artpec8-pcie-ep.yaml | 108 ++++++++++++++++++
> .../devicetree/bindings/pci/axis,artpec8-pcie.yaml | 123 +++++++++++++++++++++
> 2 files changed, 231 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
>
> diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> new file mode 100644
> index 0000000..3512e38
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
> @@ -0,0 +1,108 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/axis,artpec8-pcie-ep.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARTPEC-8 SoC PCIe Controller Device Tree Bindings
s/Device Tree Bindings//
> +
> +maintainers:
> + - Jesper Nilsson <jesper.nilsson@axis.com>
> +
> +description: |+
> + This PCIe end-point controller is based on the Synopsys DesignWare PCIe IP
> + and thus inherits all the common properties defined in snps,dw-pcie-ep.yaml.
> +
> +allOf:
> + - $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
> +
> +properties:
> + compatible:
> + const: axis,artpec8-pcie-ep
> +
> + reg:
> + items:
> + - description: Data Bus Interface (DBI) registers.
> + - description: Data Bus Interface (DBI2) registers.
> + - description: PCIe address space region.
> +
> + reg-names:
> + items:
> + - const: dbi
> + - const: dbi2
> + - const: addr_space
> +
> + interrupts:
> + maxItems: 1
> +
> + interrupts-names:
> + items:
> + - const: intr
Remove the interrupts-names entirely, no need for single item with
generic name.
> +
> + clocks:
> + items:
> + - description: PIPE clock, used by the controller to clock the PIPE
> + - description: PCIe dbi clock, ungated version
> + - description: PCIe master clock, ungated version
> + - description: PCIe slave clock, ungated version
> +
> + clock-names:
> + items:
> + - const: pipe_clk
> + - const: dbi_clk
> + - const: mstr_clk
> + - const: slv_clk
Remove "_clk" suffix from all entries.
> +
> + phys:
> + maxItems: 1
> +
> + phy-names:
> + items:
> + - const: pcie_phy
Remove the phy-names entirely, no need for single item with generic name.
> +
> + num-lanes:
> + const: 2
> +
> +required:
My comment was not applied here, so please fix it.
> + - reg
> + - reg-names
> + - interrupts
> + - interrupt-names
> + - clocks
> + - clock-names
> + - phys
> + - num-lanes
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + artpec8 {
Generic nodes please. Did you see "artpec8" or something like this in
any DTS?
> + #address-cells = <2>;
> + #size-cells = <2>;
> + pcie_ep: pcie-ep@17200000 {
> + compatible = "axis,artpec8-pcie-ep";
> + reg = <0x0 0x17200000 0x0 0x1000>,
> + <0x0 0x17201000 0x0 0x1000>,
> + <0x2 0x00000000 0x6 0x00000000>;
> + reg-names = "dbi", "dbi2", "addr_space";
> + #interrupt-cells = <1>;
> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "intr";
> + clocks = <&clock_cmu_fsys 39>,
> + <&clock_cmu_fsys 38>,
> + <&clock_cmu_fsys 37>,
> + <&clock_cmu_fsys 36>;
> + clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
> + phys = <&pcie_phy>;
> + phy-names = "pcie_phy";
> + num-lanes = <2>;
> + bus-range = <0x00 0xff>;
> + num-ib-windows = <16>;
> + num-ob-windows = <16>;
> + };
> + };
> +...
> diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
> new file mode 100644
> index 0000000..945a061
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
> @@ -0,0 +1,123 @@
> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/pci/axis,artpec8-pcie.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: Artpec-8 SoC PCIe Controller Device Tree Bindings
Ditto
> +
> +maintainers:
> + - Jesper Nilsson <jesper.nilsson@axis.com>
> +
> +description: |+
> + This PCIe host controller is based on the Synopsys DesignWare PCIe IP
> + and thus inherits all the common properties defined in snps,dw-pcie.yaml.
> +
> +allOf:
> + - $ref: /schemas/pci/snps,dw-pcie.yaml#
> +
> +properties:
> + compatible:
> + const: axis,artpec8-pcie
> +
> + reg:
> + items:
> + - description: Data Bus Interface (DBI) registers.
> + - description: External Local Bus interface (ELBI) registers.
> + - description: PCIe configuration space region.
> +
> + reg-names:
> + items:
> + - const: dbi
> + - const: elbi
> + - const: config
> +
> + device_type:
> + items:
It's not a list, but just a string. No need for items.
> + - const: pci
> +
> + ranges:
> + maxItems: 2
> +
> + num-lanes:
> + const: 2
> +
> + interrupts:
> + maxItems: 1
> +
> + interrupts-names:
> + items:
> + - const: intr
Remove entire property.
> +
> + clocks:
> + items:
> + - description: PIPE clock, used by the controller to clock the PIPE
> + - description: PCIe dbi clock, ungated version
> + - description: PCIe master clock, ungated version
> + - description: PCIe slave clock, ungated version
> +
> + clock-names:
> + items:
> + - const: pipe_clk
> + - const: dbi_clk
> + - const: mstr_clk
> + - const: slv_clk
Remove suffix.
> +
> + phys:
> + maxItems: 1
> +
> + phy-names:
> + items:
> + - const: pcie_phy
Remove entire property.
> +
> +required:
Previous comment not applied.
> + - reg
> + - reg-names
> + - device_type
> + - ranges
> + - num-lanes
> + - interrupts
> + - interrupt-names
> + - clocks
> + - clock-names
> + - phys
> + - phy-names
> +
> +unevaluatedProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + artpec8 {
Same as previous patch.
> + #address-cells = <2>;
> + #size-cells = <2>;
> + pcie: pcie@17200000 {
> + compatible = "axis,artpec8-pcie";
> + reg = <0x0 0x17200000 0x0 0x1000>,
> + <0x0 0x16ca0000 0x0 0x2000>,
> + <0x7 0x0001e000 0x0 0x2000>;
> + reg-names = "dbi", "elbi", "config";
> + #address-cells = <3>;
> + #size-cells = <2>;
> + device_type = "pci";
> + ranges = </* non-prefetchable memory */
> + 0x83000000 0x0 0x0000000 0x2 0x00000000 0x5 0x00000000
> + /* downstream I/O */
> + 0x81000000 0x0 0x0000000 0x7 0x00000000 0x0 0x00010000>;
> + num-lanes = <2>;
> + bus-range = <0x00 0xff>;
> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
> + interrupt-names = "intr";
> + #interrupt-cells = <1>;
> + clocks = <&cmu_fsys 39>,
> + <&cmu_fsys 38>,
> + <&cmu_fsys 37>,
> + <&cmu_fsys 36>;
> + clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
> + phys = <&pcie_phy>;
> + phy-names = "pcie_phy";
> + };
> + };
> +...
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy
2022-06-03 2:31 ` [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy Wangseok Lee
@ 2022-06-06 10:14 ` Krzysztof Kozlowski
0 siblings, 0 replies; 18+ messages in thread
From: Krzysztof Kozlowski @ 2022-06-06 10:14 UTC (permalink / raw)
To: wangseok.lee, robh+dt, krzk+dt, kishon, vkoul, linux-kernel,
jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
On 03/06/2022 04:31, Wangseok Lee wrote:
> Add description to support Axis, ARTPEC-8 SoC.
> ARTPEC-8 is the SoC platform of Axis Communications
> and PCIe phy is designed based on SAMSUNG PHY.
This does not look like wrapped in Linux commit style.
https://elixir.bootlin.com/linux/v5.18-rc4/source/Documentation/process/submitting-patches.rst#L586
>
> changes since v1 :
> -'make dt_binding_check' result improvement
> -Add the missing property list
> -Align the indentation of continued lines/entries
>
> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
> ---
> .../bindings/phy/axis,artpec8-pcie-phy.yaml | 70 ++++++++++++++++++++++
> 1 file changed, 70 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
>
> diff --git a/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
> new file mode 100644
> index 0000000..ab9766f
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
> @@ -0,0 +1,70 @@
> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
> +%YAML 1.2
> +---
> +$id: http://devicetree.org/schemas/phy/axis,artpec8-pcie-phy.yaml#
> +$schema: http://devicetree.org/meta-schemas/core.yaml#
> +
> +title: ARTPEC-8 SoC PCIe PHY Device Tree Bindings
Same comment as patch #1.
> +
> +maintainers:
> + - Jesper Nilsson <jesper.nilsson@axis.com>
> +
> +properties:
> + compatible:
> + const: axis,artpec8-pcie-phy
> +
> + reg:
> + items:
> + - description: PHY registers.
> + - description: PHY coding sublayer registers.
> +
> + reg-names:
> + items:
> + - const: phy
> + - const: pcs
> +
> + "#phy-cells":
> + const: 0
> +
> + clocks:
> + items:
> + - description: PCIe PHY reference clock
> +
> + clock-names:
> + items:
> + - const: ref_clk
Same comment as patch #1.
> +
> + num-lanes:
> + const: 2
> +
> +required:
> + - compatible
> + - reg
> + - reg-names
> + - "#phy-cells"
> + - clocks
> + - clock-names
> + - num-lanes
> +
> +additionalProperties: false
> +
> +examples:
> + - |
> + #include <dt-bindings/interrupt-controller/irq.h>
> + #include <dt-bindings/interrupt-controller/arm-gic.h>
> +
> + artpec8 {
Same comment as patch #1.
> + #address-cells = <2>;
> + #size-cells = <2>;
> + pcie_phy: pcie-phy@16c80000 {
> + compatible = "axis,artpec8-pcie-phy";
> + reg = <0x0 0x16c80000 0x0 0x2000>,
> + <0x0 0x16c90000 0x0 0x1000>;
> + reg-names = "phy", "pcs";
> + #phy-cells = <0>;
> + clocks = <&clock_cmu_fsys 53>;
> + clock-names = "ref_clk";
> + num-lanes = <2>;
> + };
> + };
> +...
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver
2022-06-03 2:34 ` [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver Wangseok Lee
2022-06-03 16:03 ` Bjorn Helgaas
@ 2022-06-06 10:23 ` Krzysztof Kozlowski
1 sibling, 0 replies; 18+ messages in thread
From: Krzysztof Kozlowski @ 2022-06-06 10:23 UTC (permalink / raw)
To: wangseok.lee, robh+dt, krzk+dt, kishon, vkoul, linux-kernel,
jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
On 03/06/2022 04:34, Wangseok Lee wrote:
> Add support Axis, ARTPEC-8 SoC.
> ARTPEC-8 is the SoC platform of Axis Communications.
> This is based on arm64 and support GEN4 & 2lane.
> This PCIe controller is based on DesignWare Hardware core
> and uses DesignWare core functions to implement the driver.
>
> changes since v1 :
> improvement review comment of Krzysztof on driver code.
> -debug messages for probe or other functions.
> -Inconsistent coding style (different indentation in structure members).
> -Inconsistent code (artpec8_pcie_get_subsystem_resources() gets device
> from pdev and from pci so you have two same pointers;
> or artpec8_pcie_get_ep_mem_resources() stores dev
> as local variable but uses instead pdev->dev).
> -Not using devm_platform_ioremap_resource().
> -Printing messages in interrupt handlers.
> -Several local/static structures or array are not const.
>
> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
> ---
> drivers/pci/controller/dwc/Kconfig | 31 ++
> drivers/pci/controller/dwc/Makefile | 1 +
> drivers/pci/controller/dwc/pcie-artpec8.c | 864 ++++++++++++++++++++++++++++++
> 3 files changed, 896 insertions(+)
> create mode 100644 drivers/pci/controller/dwc/pcie-artpec8.c
>
> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
> index 62ce3ab..4aa6da8 100644
> --- a/drivers/pci/controller/dwc/Kconfig
> +++ b/drivers/pci/controller/dwc/Kconfig
> @@ -222,6 +222,37 @@ config PCIE_ARTPEC6_EP
> Enables support for the PCIe controller in the ARTPEC-6 SoC to work in
> endpoint mode. This uses the DesignWare core.
>
> +config PCIE_ARTPEC8
> + bool "Axis ARTPEC-8 PCIe controller"
> +
> +config PCIE_ARTPEC8_HOST
> + bool "Axis ARTPEC-8 PCIe controller Host Mode"
> + depends on ARCH_ARTPEC
|| COMPILE_TEST
and test it
> + depends on PCI_MSI_IRQ_DOMAIN
> + depends on PCI_ENDPOINT
> + select PCI_EPF_TEST
> + select PCIE_DW_HOST
> + select PCIE_ARTPEC8
> + help
> + Say 'Y' here to enable support for the PCIe controller in the
> + ARTPEC-8 SoC to work in host mode.
> + This PCIe controller is based on DesignWare Hardware core.
> + And uses DesignWare core functions to implement the driver.
> +
> +config PCIE_ARTPEC8_EP
> + bool "Axis ARTPEC-8 PCIe controller Endpoint Mode"
> + depends on ARCH_ARTPEC
|| COMPILE_TEST
and test it
> + depends on PCI_ENDPOINT
> + depends on PCI_ENDPOINT_CONFIGFS
> + select PCI_EPF_TEST
> + select PCIE_DW_EP
> + select PCIE_ARTPEC8
> + help
> + Say 'Y' here to enable support for the PCIe controller in the
> + ARTPEC-8 SoC to work in endpoint mode.
> + This PCIe controller is based on DesignWare Hardware core.
> + And uses DesignWare core functions to implement the driver.
> +
> config PCIE_ROCKCHIP_DW_HOST
> bool "Rockchip DesignWare PCIe controller"
> select PCIE_DW
> diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
> index 8ba7b67..b361022 100644
> --- a/drivers/pci/controller/dwc/Makefile
> +++ b/drivers/pci/controller/dwc/Makefile
> @@ -25,6 +25,7 @@ obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
> obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
> obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
> obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o
> +obj-$(CONFIG_PCIE_ARTPEC8) += pcie-artpec8.o
This does not look properly ordered. Usually entries should not be added
at the end.
>
> # The following drivers are for devices that use the generic ACPI
> # pci_root.c driver but don't support standard ECAM config access.
> diff --git a/drivers/pci/controller/dwc/pcie-artpec8.c b/drivers/pci/controller/dwc/pcie-artpec8.c
> new file mode 100644
> index 0000000..d9ae9bf
> --- /dev/null
> +++ b/drivers/pci/controller/dwc/pcie-artpec8.c
> @@ -0,0 +1,864 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * PCIe controller driver for Axis ARTPEC-8 SoC
> + *
> + * Copyright (C) 2019 Samsung Electronics Co., Ltd.
> + * http://www.samsung.com
> + *
> + * Author: Jaeho Cho <jaeho79.cho@samsung.com>
> + * This file is based on driver/pci/controller/dwc/pci-exynos.c
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/module.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/of_device.h>
> +#include <linux/regmap.h>
> +#include <linux/resource.h>
> +#include <linux/types.h>
> +#include <linux/phy/phy.h>
> +
> +#include "pcie-designware.h"
> +
> +#define to_artpec8_pcie(x) dev_get_drvdata((x)->dev)
> +
> +/* Gen3 Control Register */
> +#define PCIE_GEN3_RELATED_OFF 0x890
> +/* Disables equilzation feature */
> +#define PCIE_GEN3_EQUALIZATION_DISABLE (0x1 << 16)
> +#define PCIE_GEN3_EQ_PHASE_2_3 (0x1 << 9)
> +#define PCIE_GEN3_RXEQ_PH01_EN (0x1 << 12)
> +#define PCIE_GEN3_RXEQ_RGRDLESS_RXTS (0x1 << 13)
> +
> +#define FAST_LINK_MODE (7)
> +
> +/* PCIe ELBI registers */
> +#define PCIE_IRQ0_STS 0x000
> +#define PCIE_IRQ1_STS 0x004
> +#define PCIE_IRQ2_STS 0x008
> +#define PCIE_IRQ5_STS 0x00C
> +#define PCIE_IRQ0_EN 0x010
> +#define PCIE_IRQ1_EN 0x014
> +#define PCIE_IRQ2_EN 0x018
> +#define PCIE_IRQ5_EN 0x01C
> +#define IRQ_MSI_ENABLE BIT(20)
> +#define PCIE_APP_LTSSM_ENABLE 0x054
> +#define PCIE_ELBI_LTSSM_ENABLE 0x1
> +#define PCIE_ELBI_CXPL_DEBUG_00_31 0x2C8
> +#define PCIE_ELBI_CXPL_DEBUG_32_63 0x2CC
> +#define PCIE_ELBI_SMLH_LINK_UP BIT(4)
> +#define PCIE_ARTPEC8_DEVICE_TYPE 0x080
> +#define DEVICE_TYPE_EP 0x0
> +#define DEVICE_TYPE_LEG_EP 0x1
> +#define DEVICE_TYPE_RC 0x4
> +#define PCIE_ELBI_SLV_AWMISC 0x828
> +#define PCIE_ELBI_SLV_ARMISC 0x820
> +#define PCIE_ELBI_SLV_DBI_ENABLE BIT(21)
> +#define LTSSM_STATE_MASK 0x3f
> +#define LTSSM_STATE_L0 0x11
> +
> +/* FSYS SYSREG Offsets */
> +#define FSYS_PCIE_CON 0x424
> +#define PCIE_PERSTN BIT(5)
> +#define FSYS_PCIE_DBI_ADDR_CON 0x428
> +#define FSYS_PCIE_DBI_ADDR_OVR_CDM 0x00
> +#define FSYS_PCIE_DBI_ADDR_OVR_SHADOW 0x12
> +#define FSYS_PCIE_DBI_ADDR_OVR_ATU 0x36
> +
> +/* PMU SYSCON Offsets */
> +#define PMU_SYSCON_PCIE_ISOLATION 0x3200
> +
> +/* BUS P/S SYSCON Offsets */
> +#define BUS_SYSCON_BUS_PATH_ENABLE 0x0
> +
> +int artpec8_pcie_dbi_addr_con[] = {
1. I think I pointed before the need to constify everything which is const.
2. Missing static
3. definitions of static variables go after type declarations.
> + FSYS_PCIE_DBI_ADDR_CON
> +};
> +
> +struct artpec8_pcie {
> + struct dw_pcie *pci;
> + struct clk *pipe_clk;
> + struct clk *dbi_clk;
> + struct clk *mstr_clk;
> + struct clk *slv_clk;
Not really... Just use clk_bulk_api.
> + const struct artpec8_pcie_pdata *pdata;
> + void __iomem *elbi_base;
> + struct regmap *sysreg;
> + struct regmap *pmu_syscon;
> + struct regmap *bus_s_syscon;
> + struct regmap *bus_p_syscon;
> + enum dw_pcie_device_mode mode;
> + int link_id;
> + /* For Generic PHY Framework */
Skip comment, it's obvious.
> + struct phy *phy;
> +};
> +
> + /* fsys sysreg regmap handle */
> + artpec8_ctrl->sysreg =
> + syscon_regmap_lookup_by_phandle(dev->of_node,
> + "samsung,fsys-sysreg");
NAK.
Usage of undocumented properties. Every property must be documented.
Since you do not want to merge it with existing drivers (and more people
insist on that: https://lore.kernel.org/all/Ym+u9yYrV9mxkyWX@matsya/ ),
I am actually considering to NAK entire set if you do not post a user of
this - DTS. Mainly because we cannot verify how does that user look like
and such changes are sneaked in.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver
2022-06-03 2:38 ` [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver Wangseok Lee
@ 2022-06-06 10:28 ` Krzysztof Kozlowski
0 siblings, 0 replies; 18+ messages in thread
From: Krzysztof Kozlowski @ 2022-06-06 10:28 UTC (permalink / raw)
To: wangseok.lee, robh+dt, krzk+dt, kishon, vkoul, linux-kernel,
jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang
On 03/06/2022 04:38, Wangseok Lee wrote:
> Add support Axis, ARTPEC-8 SoC.
> ARTPEC-8 is the SoC platform of Axis Communications.
> This is based on arm64 and support GEN4 & 2lane.
> This driver provides PHY interface for ARTPEC-8 SoC PCIe controller,
> based on Samsung PCIe PHY IP.
>
> Main changes since v1 [1]:
> -change folder name of phy driver to axis from artpec
>
> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
> ---
> drivers/phy/Kconfig | 1 +
> drivers/phy/Makefile | 1 +
> drivers/phy/axis/Kconfig | 9 +
> drivers/phy/axis/Makefile | 2 +
> drivers/phy/axis/phy-artpec8-pcie.c | 806 ++++++++++++++++++++++++++++++++++++
> 5 files changed, 819 insertions(+)
> create mode 100644 drivers/phy/axis/Kconfig
> create mode 100644 drivers/phy/axis/Makefile
> create mode 100644 drivers/phy/axis/phy-artpec8-pcie.c
>
> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
> index 300b0f2..92b8232 100644
> --- a/drivers/phy/Kconfig
> +++ b/drivers/phy/Kconfig
> @@ -73,6 +73,7 @@ config PHY_CAN_TRANSCEIVER
>
> source "drivers/phy/allwinner/Kconfig"
> source "drivers/phy/amlogic/Kconfig"
> +source "drivers/phy/axis/Kconfig"
> source "drivers/phy/broadcom/Kconfig"
> source "drivers/phy/cadence/Kconfig"
> source "drivers/phy/freescale/Kconfig"
> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
> index 01e9eff..808c055e 100644
> --- a/drivers/phy/Makefile
> +++ b/drivers/phy/Makefile
> @@ -12,6 +12,7 @@ obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
> obj-$(CONFIG_USB_LGM_PHY) += phy-lgm-usb.o
> obj-y += allwinner/ \
> amlogic/ \
> + axis/ \
> broadcom/ \
> cadence/ \
> freescale/ \
> diff --git a/drivers/phy/axis/Kconfig b/drivers/phy/axis/Kconfig
> new file mode 100644
> index 0000000..7198b93
> --- /dev/null
> +++ b/drivers/phy/axis/Kconfig
> @@ -0,0 +1,9 @@
> +config PHY_ARTPEC8_PCIE
> + bool "ARTPEC-8 PCIe PHY driver"
> + depends on OF && (ARCH_ARTPEC8 || COMPILE_TEST)
> + select GENERIC_PHY
> + help
> + Enable PCIe PHY support for ARTPEC-8 SoC.
> + This driver provides PHY interface for ARTPEC-8 SoC
> + PCIe controller.
> + This is based on Samsung PCIe PHY IP.
> diff --git a/drivers/phy/axis/Makefile b/drivers/phy/axis/Makefile
> new file mode 100644
> index 0000000..45d853c
> --- /dev/null
> +++ b/drivers/phy/axis/Makefile
> @@ -0,0 +1,2 @@
> +# SPDX-License-Identifier: GPL-2.0
> +obj-$(CONFIG_PHY_ARTPEC8_PCIE) += phy-artpec8-pcie.o
> diff --git a/drivers/phy/axis/phy-artpec8-pcie.c b/drivers/phy/axis/phy-artpec8-pcie.c
> new file mode 100644
> index 0000000..2742301
> --- /dev/null
> +++ b/drivers/phy/axis/phy-artpec8-pcie.c
> @@ -0,0 +1,806 @@
> +// SPDX-License-Identifier: GPL-2.0-only
> +/*
> + * PHY provider for ARTPEC-8 PCIe controller
> + *
> + * Copyright (C) 2019 Samsung Electronics Co., Ltd.
> + * http://www.samsung.com
> + *
> + * Author: Jaeho Cho <jaeho79.cho@samsung.com>
> + */
> +
> +#include <linux/clk.h>
> +#include <linux/io.h>
> +#include <linux/init.h>
> +#include <linux/mfd/syscon.h>
> +#include <linux/module.h>
> +#include <linux/of.h>
> +#include <linux/of_address.h>
> +#include <linux/of_platform.h>
> +#include <linux/platform_device.h>
> +#include <linux/phy/phy.h>
> +#include <linux/regmap.h>
> +#include <linux/debugfs.h>
> +
> +/* ARTPEC-8 PCIe PHY registers */
> +/* CMN registers */
> +#define PCIE_PHY_CMN_REG004 0x10
> +#define PCIE_PHY_CMN_REG00B 0x2C
> +#define PCIE_PHY_CMN_REG016 0x58
> +#define PCIE_PHY_CMN_REG01C 0x70
> +#define PCIE_PHY_CMN_REG021 0x84
> +#define PCIE_PHY_CMN_REG024 0x90
> +#define PCIE_PHY_CMN_REG025 0x94
> +#define PCIE_PHY_CMN_REG0E6 0x398
> +#define PCIE_PHY_CMN_REG0E7 0x39C
> +#define PCIE_PHY_CMN_REG0E8 0x3A0
> +#define PCIE_PHY_CMN_REG0E9 0x3A4
> +#define PCIE_PHY_CMN_REG0EA 0x3A8
> +#define PCIE_PHY_CMN_REG0EB 0x3AC
> +#define PCIE_PHY_CMN_REG0EC 0x3B0
> +#define PCIE_PHY_CMN_REG0EE 0x3B8
> +#define PCIE_PHY_CMN_REG0EF 0x3BC
> +#define PCIE_PHY_CMN_REG0F1 0x3C4
> +#define PCIE_PHY_CMN_REG0F3 0x3CC
> +#define PCIE_PHY_CMN_REG0F4 0x3D0
> +
> +#define PCIE_PHY_CMN_REG101 0x404
> +#define OV_I_CMN_RSTN BIT(4)
> +#define OV_I_INIT_RSTN BIT(6)
> +
> +#define PCIE_PHY_CMN_REG131 0x4C4
> +#define PCIE_PHY_CMN_REG17B 0x5EC
> +#define PCIE_PHY_CMN_REG17D 0x5F4
> +#define PCIE_PHY_CMN_REG190 0x640
> +#define PCIE_PHY_CMN_REG191 0x644
> +#define PCIE_PHY_CMN_REG192 0x648
> +#define PCIE_PHY_CMN_REG1C7 0x71C
> +#define PCIE_PHY_CMN_REG1DF 0x77C
> +#define PCIE_PHY_CMN_REG1E0 0x780
> +
> +#define PCIE_PHY_CMN_REG0B1 0x2C4
> +#define ANA_ROPLL_REF_DIG_CLK_SEL BIT(2)
> +
> +/* External clock */
> +#define PCIE_PHY_CMN_REG14D 0x534
> +#define PCIE_AUX_RX_MODE_EXTEND BIT(7)
> +
> +#define PCIE_PHY_CMN_REG0D9 0x364
> +#define ANA_AUX_EXT_REF_CLK_SEL BIT(4)
> +
> +#define PCIE_PHY_CMN_REG10F 0x43C
> +#define AUX_PLL_EN_EXTEND BIT(4)
> +
> +#define PCIE_PHY_CMN_REG11E 0x478
> +#define AUX2_PLL_EN_EXTEND BIT(3)
> +
> +#define PCIE_PHY_CMN_REG0D4 0x350
> +#define OV_S_ANA_AUX_EN BIT(3)
> +#define OV_I_ANA_AUX_EN BIT(2)
> +
> +/* LANE registers */
> +#define PCIE_PHY_TRSV_REG22D 0x8B4
> +#define PCIE_PHY_TRSV_REG23E 0x8F8
> +#define PCIE_PHY_TRSV_REG2A5 0xA94
> +#define PCIE_PHY_TRSV_REG3E3 0xF8C
> +#define PCIE_PHY_TRSV_REG3ED 0xFB4
> +#define PCIE_PHY_TRSV_REG20B 0x82C
> +#define PCIE_PHY_TRSV_REG20C 0x830
> +#define PCIE_PHY_TRSV_REG234 0x8D0
> +#define PCIE_PHY_TRSV_REG235 0x8D4
> +#define PCIE_PHY_TRSV_REG237 0x8DC
> +#define PCIE_PHY_TRSV_REG239 0x8E4
> +#define PCIE_PHY_TRSV_REG23A 0x8E8
> +#define PCIE_PHY_TRSV_REG23B 0x8EC
> +#define PCIE_PHY_TRSV_REG24B 0x92C
> +#define PCIE_PHY_TRSV_REG25D 0x974
> +#define PCIE_PHY_TRSV_REG262 0x988
> +#define PCIE_PHY_TRSV_REG271 0x9C4
> +#define PCIE_PHY_TRSV_REG272 0x9C8
> +#define PCIE_PHY_TRSV_REG27C 0x9F0
> +#define PCIE_PHY_TRSV_REG27D 0x9F4
> +#define PCIE_PHY_TRSV_REG27E 0x9F8
> +#define PCIE_PHY_TRSV_REG284 0xA10
> +#define PCIE_PHY_TRSV_REG289 0xA24
> +#define PCIE_PHY_TRSV_REG28A 0xA28
> +#define PCIE_PHY_TRSV_REG28B 0xA2C
> +#define PCIE_PHY_TRSV_REG28C 0xA30
> +#define PCIE_PHY_TRSV_REG28E 0xA38
> +#define PCIE_PHY_TRSV_REG28F 0xA3C
> +#define PCIE_PHY_TRSV_REG290 0xA40
> +#define PCIE_PHY_TRSV_REG291 0xA44
> +#define PCIE_PHY_TRSV_REG292 0xA48
> +#define PCIE_PHY_TRSV_REG294 0xA50
> +#define PCIE_PHY_TRSV_REG295 0xA54
> +#define PCIE_PHY_TRSV_REG296 0xA58
> +#define PCIE_PHY_TRSV_REG297 0xA5C
> +#define PCIE_PHY_TRSV_REG298 0xA60
> +#define PCIE_PHY_TRSV_REG29B 0xA6C
> +#define PCIE_PHY_TRSV_REG29C 0xA70
> +#define PCIE_PHY_TRSV_REG29D 0xA74
> +#define PCIE_PHY_TRSV_REG29E 0xA78
> +#define PCIE_PHY_TRSV_REG2AA 0xAA8
> +#define PCIE_PHY_TRSV_REG2AE 0xAB8
> +#define PCIE_PHY_TRSV_REG2C2 0xB08
> +#define PCIE_PHY_TRSV_REG2C6 0xB18
> +#define PCIE_PHY_TRSV_REG2C7 0xB1C
> +#define PCIE_PHY_TRSV_REG2CB 0xB2C
> +#define PCIE_PHY_TRSV_REG2CC 0xB30
> +#define PCIE_PHY_TRSV_REG2CD 0xB34
> +#define PCIE_PHY_TRSV_REG2CE 0xB38
> +#define PCIE_PHY_TRSV_REG2D0 0xB40
> +#define PCIE_PHY_TRSV_REG2CF 0xB3C
> +#define PCIE_PHY_TRSV_REG2E0 0xB80
> +#define PCIE_PHY_TRSV_REG2E9 0xBA4
> +#define PCIE_PHY_TRSV_REG2EA 0xBA8
> +#define PCIE_PHY_TRSV_REG2EB 0xBAC
> +#define PCIE_PHY_TRSV_REG315 0xC54
> +#define PCIE_PHY_TRSV_REG317 0xC5C
> +#define PCIE_PHY_TRSV_REG319 0xC64
> +#define PCIE_PHY_TRSV_REG364 0xD90
> +#define PCIE_PHY_TRSV_REG36C 0xDB0
> +#define PCIE_PHY_TRSV_REG36D 0xDB4
> +#define PCIE_PHY_TRSV_REG37E 0xDF8
> +#define PCIE_PHY_TRSV_REG37F 0xDFC
> +#define PCIE_PHY_TRSV_REG38F 0xE3C
> +#define PCIE_PHY_TRSV_REG391 0xE44
> +#define PCIE_PHY_TRSV_REG39C 0xE70
> +#define PCIE_PHY_TRSV_REG3A8 0xEA0
> +#define PCIE_PHY_TRSV_REG3E0 0xF80
> +#define PCIE_PHY_TRSV_REG3E1 0xF84
> +#define PCIE_PHY_TRSV_REG3E7 0xF9C
> +#define PCIE_PHY_TRSV_REG3E9 0xFA4
> +#define PCIE_PHY_TRSV_REG3EA 0xFA8
> +#define PCIE_PHY_TRSV_REG3EE 0xFB8
> +#define PCIE_PHY_TRSV_REG3EF 0xFBC
> +#define PCIE_PHY_TRSV_REG3F0 0xFC0
> +
> +#define PCIE_PHY_TRSV_REG2C0 0xB00
> +#define LN_EQ_CTRL_RX_DATA_HOLD BIT(5)
> +
> +/* RX Preset registers */
> +#define PCIE_PHY_CMN_REG17E 0x5F8
> +#define PCIE_PHY_CMN_REG180 0x600
> +#define PCIE_PHY_CMN_REG181 0x604
> +#define PCIE_PHY_CMN_REG182 0x608
> +#define PCIE_PHY_CMN_REG183 0x60C
> +#define PCIE_PHY_CMN_REG184 0x610
> +#define PCIE_PHY_CMN_REG185 0x614
> +#define PCIE_PHY_CMN_REG186 0x618
> +#define PCIE_PHY_CMN_REG187 0x61C
> +
> +
> +/* ARTPEC-8 PCIe PCS registers */
> +#define PCIE_PCS_OUT_VEC_4 0x154
> +#define B1_DYNAMIC BIT(3)
> +
> +/* ARTPEC-8 SYS REG registers */
> +#define FSYS_PCIE_CON 0x424
> +#define PCIE_PHY_LCPLL_REFCLK_SEL 0x3
> +#define PCIE_PHY_ROPLL_REFCLK_SEL (0x3UL << 2)
> +#define ROPLL_REFCLK_NOT_AVAILABLE (0x2UL << 2)
> +#define PCIE_PHY_LN0_REFCLK_PAD_EN BIT(10)
> +#define PCIE_PHY_LN1_REFCLK_PAD_EN BIT(11)
> +#define PCIE_PHY_PWR_OFF BIT(7)
> +
> +/* ARTPEC-8 Sub Controller registers */
> +#define SFR_INIT_RSTN 0x1404
> +#define SFR_CMN_RSTN 0x1408
> +
> +#define PCIE_PHY_LN0_REG_START 0x800
> +#define PCIE_PHY_LN0_REG_END 0xFCC
> +#define OFFSET_PER_LANE 0x800
> +
> +enum artpec8_pcie_phy_num_lanes {
> + LANE0 = 0,
> + LANE1,
> + LANE_MAX
> +};
> +
> +struct artpec8_pcie_phy_data {
> + const struct phy_ops *ops;
No need for indentation before "*ops". Other places do not use it.
> +};
> +
> +struct artpec8_pcie_phy {
> + const struct artpec8_pcie_phy_data *drv_data;
> + void __iomem *phy_base;
> + void __iomem *pcs_base;
> + void __iomem *elbi_base;
> + struct clk *soc_pll_clk;
> + struct regmap *sysreg;
> + u32 lcpll_ref_clk;
> + const char *mode;
> + u32 num_lanes;
> +};
> +
> +enum artpec8_pcie_ref_clk {
> + REF_CLK_FROM_XO = 0,
> + REF_CLK_FROM_IO,
> + REF_CLK_RESERVED,
> + REF_CLK_FROM_SOC_PLL,
> + REF_CLK_MAX
> +};
> +
> +struct artpec8_pcie_phy_tune_reg {
> + u32 offset;
> + u32 val;
> +};
> +
> +/* ARTPEC-8 PCIe Gen4 x2 PHY CMN register settings */
> +struct artpec8_pcie_phy_tune_reg cmn_regs[] = {
static const
> + {PCIE_PHY_CMN_REG004, 0x65},
> + {PCIE_PHY_CMN_REG00B, 0x18},
> + {PCIE_PHY_CMN_REG016, 0x0E},
> + {PCIE_PHY_CMN_REG01C, 0x4F},
> + {PCIE_PHY_CMN_REG021, 0x01},
> + {PCIE_PHY_CMN_REG024, 0x58},
> + {PCIE_PHY_CMN_REG025, 0x98},
> + {PCIE_PHY_CMN_REG0E6, 0x00},
> + {PCIE_PHY_CMN_REG0E7, 0x00},
> + {PCIE_PHY_CMN_REG0E8, 0x3F},
> + {PCIE_PHY_CMN_REG0E9, 0x3F},
> + {PCIE_PHY_CMN_REG0EA, 0xFF},
> + {PCIE_PHY_CMN_REG0EB, 0xFF},
> + {PCIE_PHY_CMN_REG0EC, 0x42},
> + {PCIE_PHY_CMN_REG0EE, 0x3F},
> + {PCIE_PHY_CMN_REG0EF, 0x7F},
> + {PCIE_PHY_CMN_REG0F1, 0x02},
> + {PCIE_PHY_CMN_REG0F3, 0xFF},
> + {PCIE_PHY_CMN_REG0F4, 0xFF},
> + {PCIE_PHY_CMN_REG131, 0x01},
> + {PCIE_PHY_CMN_REG17B, 0xC0},
> + {PCIE_PHY_CMN_REG17D, 0xAF},
> + {PCIE_PHY_CMN_REG190, 0x27},
> + {PCIE_PHY_CMN_REG191, 0x0F},
> + {PCIE_PHY_CMN_REG192, 0x3F},
> + {PCIE_PHY_CMN_REG1C7, 0x05},
> + {PCIE_PHY_CMN_REG1DF, 0x28},
> + {PCIE_PHY_CMN_REG1E0, 0x28},
> +};
> +
> +/* ARTPEC-8 PCIe Gen4 x2 PHY lane register settings */
> +struct artpec8_pcie_phy_tune_reg lane_regs[] = {
Same.
> + {PCIE_PHY_TRSV_REG22D, 0x00},
> + {PCIE_PHY_TRSV_REG23E, 0x00},
> + {PCIE_PHY_TRSV_REG2A5, 0x73},
> + {PCIE_PHY_TRSV_REG3E3, 0x7B},
> + {PCIE_PHY_TRSV_REG3ED, 0x4B},
> + {PCIE_PHY_TRSV_REG20B, 0x02},
> + {PCIE_PHY_TRSV_REG20C, 0xEA},
> + {PCIE_PHY_TRSV_REG234, 0x7A},
> + {PCIE_PHY_TRSV_REG235, 0x1C},
> + {PCIE_PHY_TRSV_REG237, 0x10},
> + {PCIE_PHY_TRSV_REG239, 0x68},
> + {PCIE_PHY_TRSV_REG23A, 0xC0},
> + {PCIE_PHY_TRSV_REG23B, 0x0B},
> + {PCIE_PHY_TRSV_REG24B, 0x00},
> + {PCIE_PHY_TRSV_REG25D, 0x07},
> + {PCIE_PHY_TRSV_REG262, 0x07},
> + {PCIE_PHY_TRSV_REG271, 0x23},
> + {PCIE_PHY_TRSV_REG272, 0x5E},
> + {PCIE_PHY_TRSV_REG27C, 0x8C},
> + {PCIE_PHY_TRSV_REG27D, 0x5B},
> + {PCIE_PHY_TRSV_REG27E, 0x2C},
> + {PCIE_PHY_TRSV_REG284, 0x33},
> + {PCIE_PHY_TRSV_REG289, 0xD4},
> + {PCIE_PHY_TRSV_REG28A, 0xCC},
> + {PCIE_PHY_TRSV_REG28B, 0xD9},
> + {PCIE_PHY_TRSV_REG28C, 0xDC},
> + {PCIE_PHY_TRSV_REG28E, 0xC6},
> + {PCIE_PHY_TRSV_REG28F, 0x90},
> + {PCIE_PHY_TRSV_REG290, 0x4D},
> + {PCIE_PHY_TRSV_REG291, 0x19},
> + {PCIE_PHY_TRSV_REG292, 0x1C},
> + {PCIE_PHY_TRSV_REG294, 0x05},
> + {PCIE_PHY_TRSV_REG295, 0x10},
> + {PCIE_PHY_TRSV_REG296, 0x0C},
> + {PCIE_PHY_TRSV_REG297, 0x19},
> + {PCIE_PHY_TRSV_REG298, 0x04},
> + {PCIE_PHY_TRSV_REG29B, 0x03},
> + {PCIE_PHY_TRSV_REG29C, 0x1B},
> + {PCIE_PHY_TRSV_REG29D, 0x1B},
> + {PCIE_PHY_TRSV_REG29E, 0x1F},
> + {PCIE_PHY_TRSV_REG2AA, 0x00},
> + {PCIE_PHY_TRSV_REG2AE, 0x1F},
> + {PCIE_PHY_TRSV_REG2C2, 0x25},
> + {PCIE_PHY_TRSV_REG2C6, 0x10},
> + {PCIE_PHY_TRSV_REG2C7, 0x06},
> + {PCIE_PHY_TRSV_REG2CB, 0x10},
> + {PCIE_PHY_TRSV_REG2CC, 0x06},
> + {PCIE_PHY_TRSV_REG2CD, 0x20},
> + {PCIE_PHY_TRSV_REG2CE, 0x27},
> + {PCIE_PHY_TRSV_REG2D0, 0x10},
> + {PCIE_PHY_TRSV_REG2CF, 0x0A},
> + {PCIE_PHY_TRSV_REG2E0, 0x01},
> + {PCIE_PHY_TRSV_REG2E9, 0x11},
> + {PCIE_PHY_TRSV_REG2EA, 0x05},
> + {PCIE_PHY_TRSV_REG2EB, 0x4C},
> + {PCIE_PHY_TRSV_REG315, 0x18},
> + {PCIE_PHY_TRSV_REG317, 0x86},
> + {PCIE_PHY_TRSV_REG319, 0x8E},
> + {PCIE_PHY_TRSV_REG364, 0x00},
> + {PCIE_PHY_TRSV_REG36C, 0x03},
> + {PCIE_PHY_TRSV_REG36D, 0x04},
> + {PCIE_PHY_TRSV_REG37E, 0x06},
> + {PCIE_PHY_TRSV_REG37F, 0x04},
> + {PCIE_PHY_TRSV_REG38F, 0x40},
> + {PCIE_PHY_TRSV_REG391, 0x8B},
> + {PCIE_PHY_TRSV_REG39C, 0xFF},
> + {PCIE_PHY_TRSV_REG3A8, 0x02},
> + {PCIE_PHY_TRSV_REG3E0, 0x93},
> + {PCIE_PHY_TRSV_REG3E1, 0x79},
> + {PCIE_PHY_TRSV_REG3E7, 0xF5},
> + {PCIE_PHY_TRSV_REG3E9, 0x75},
> + {PCIE_PHY_TRSV_REG3EA, 0x0D},
> + {PCIE_PHY_TRSV_REG3EE, 0xE2},
> + {PCIE_PHY_TRSV_REG3EF, 0x6F},
> + {PCIE_PHY_TRSV_REG3F0, 0x3D}
> +};
> +#define PCIE_PHY_CMN_REG17E 0x5F8
> +#define PCIE_PHY_CMN_REG180 0x600
> +#define PCIE_PHY_CMN_REG181 0x604
> +#define PCIE_PHY_CMN_REG182 0x608
> +#define PCIE_PHY_CMN_REG183 0x60C
> +#define PCIE_PHY_CMN_REG184 0x610
> +#define PCIE_PHY_CMN_REG185 0x614
> +#define PCIE_PHY_CMN_REG186 0x618
> +#define PCIE_PHY_CMN_REG187 0x61C
Defines go to the top, before any type declarations.
> +
> +struct artpec8_pcie_phy_tune_reg rx_preset_regs[] = {
Same.
> + /* 0 */
> + {PCIE_PHY_CMN_REG17E, 0x00},
> + {PCIE_PHY_CMN_REG180, 0x23},
> + {PCIE_PHY_CMN_REG181, 0x44},
> + {PCIE_PHY_CMN_REG182, 0x61},
> + {PCIE_PHY_CMN_REG183, 0x55},
> + {PCIE_PHY_CMN_REG184, 0x14},
> + {PCIE_PHY_CMN_REG185, 0x23},
> + {PCIE_PHY_CMN_REG186, 0x1A},
> + {PCIE_PHY_CMN_REG187, 0x04},
> + {PCIE_PHY_CMN_REG17E, 0x04},
> + {PCIE_PHY_CMN_REG17E, 0x00},
> + /* 1 */
> + {PCIE_PHY_CMN_REG17E, 0x08},
> + {PCIE_PHY_CMN_REG181, 0x42},
> + {PCIE_PHY_CMN_REG17E, 0x0C},
> + {PCIE_PHY_CMN_REG17E, 0x08},
> + /* 2 */
> + {PCIE_PHY_CMN_REG17E, 0x10},
> + {PCIE_PHY_CMN_REG181, 0x40},
> + {PCIE_PHY_CMN_REG17E, 0x14},
> + {PCIE_PHY_CMN_REG17E, 0x10},
> + /* 3 */
> + {PCIE_PHY_CMN_REG17E, 0x18},
> + {PCIE_PHY_CMN_REG181, 0x45},
> + {PCIE_PHY_CMN_REG17E, 0x1C},
> + {PCIE_PHY_CMN_REG17E, 0x18},
> + /* 4 */
> + {PCIE_PHY_CMN_REG17E, 0x20},
> + {PCIE_PHY_CMN_REG181, 0x46},
> + {PCIE_PHY_CMN_REG17E, 0x24},
> + {PCIE_PHY_CMN_REG17E, 0x20},
> + /* 5 */
> + {PCIE_PHY_CMN_REG17E, 0x28},
> + {PCIE_PHY_CMN_REG181, 0x48},
> + {PCIE_PHY_CMN_REG17E, 0x2C},
> + {PCIE_PHY_CMN_REG17E, 0x28},
> + /* 6 */
> + {PCIE_PHY_CMN_REG17E, 0x30},
> + {PCIE_PHY_CMN_REG181, 0x4A},
> + {PCIE_PHY_CMN_REG17E, 0x34},
> + {PCIE_PHY_CMN_REG17E, 0x30},
> + /* 7 */
> + {PCIE_PHY_CMN_REG17E, 0x38},
> + {PCIE_PHY_CMN_REG181, 0x4C},
> + {PCIE_PHY_CMN_REG17E, 0x3C},
> + {PCIE_PHY_CMN_REG17E, 0x38},
> + /* 8 */
> + {PCIE_PHY_CMN_REG17E, 0x40},
> + {PCIE_PHY_CMN_REG180, 0x20},
> + {PCIE_PHY_CMN_REG181, 0x20},
> + {PCIE_PHY_CMN_REG182, 0x01},
> + {PCIE_PHY_CMN_REG17E, 0x44},
> + {PCIE_PHY_CMN_REG17E, 0x40},
> + /* 9 */
> + {PCIE_PHY_CMN_REG17E, 0x48},
> + {PCIE_PHY_CMN_REG180, 0x20},
> + {PCIE_PHY_CMN_REG181, 0x21},
> + {PCIE_PHY_CMN_REG182, 0x01},
> + {PCIE_PHY_CMN_REG17E, 0x4C},
> + {PCIE_PHY_CMN_REG17E, 0x48},
> + /* 10 */
> + {PCIE_PHY_CMN_REG17E, 0x50},
> + {PCIE_PHY_CMN_REG180, 0x24},
> + {PCIE_PHY_CMN_REG181, 0x80},
> + {PCIE_PHY_CMN_REG182, 0x41},
> + {PCIE_PHY_CMN_REG183, 0xAF},
> + {PCIE_PHY_CMN_REG184, 0x26},
> + {PCIE_PHY_CMN_REG185, 0x34},
> + {PCIE_PHY_CMN_REG186, 0x24},
> + {PCIE_PHY_CMN_REG187, 0x06},
> + {PCIE_PHY_CMN_REG17E, 0x54},
> + {PCIE_PHY_CMN_REG17E, 0x50},
> + /* 11 */
> + {PCIE_PHY_CMN_REG17E, 0x58},
> + {PCIE_PHY_CMN_REG181, 0x81},
> + {PCIE_PHY_CMN_REG17E, 0x5C},
> + {PCIE_PHY_CMN_REG17E, 0x58},
> + /* 12 */
> + {PCIE_PHY_CMN_REG17E, 0x60},
> + {PCIE_PHY_CMN_REG181, 0x82},
> + {PCIE_PHY_CMN_REG17E, 0x64},
> + {PCIE_PHY_CMN_REG17E, 0x60},
> + /* 13 */
> + {PCIE_PHY_CMN_REG17E, 0x68},
> + {PCIE_PHY_CMN_REG181, 0x83},
> + {PCIE_PHY_CMN_REG17E, 0x6C},
> + {PCIE_PHY_CMN_REG17E, 0x68},
> + /* 14 */
> + {PCIE_PHY_CMN_REG17E, 0x70},
> + {PCIE_PHY_CMN_REG181, 0x84},
> + {PCIE_PHY_CMN_REG17E, 0x74},
> + {PCIE_PHY_CMN_REG17E, 0x70},
> + /* 15 */
> + {PCIE_PHY_CMN_REG17E, 0x78},
> + {PCIE_PHY_CMN_REG180, 0x24},
> + {PCIE_PHY_CMN_REG181, 0x85},
> + {PCIE_PHY_CMN_REG182, 0x80},
> + {PCIE_PHY_CMN_REG183, 0x7F},
> + {PCIE_PHY_CMN_REG184, 0x2D},
> + {PCIE_PHY_CMN_REG185, 0x34},
> + {PCIE_PHY_CMN_REG186, 0x24},
> + {PCIE_PHY_CMN_REG187, 0x05},
> + {PCIE_PHY_CMN_REG17E, 0x7C},
> + {PCIE_PHY_CMN_REG17E, 0x78},
> + /* 16 */
> + {PCIE_PHY_CMN_REG17E, 0x80},
> + {PCIE_PHY_CMN_REG181, 0x86},
> + {PCIE_PHY_CMN_REG17E, 0x84},
> + {PCIE_PHY_CMN_REG17E, 0x80},
> + /* 17 */
> + {PCIE_PHY_CMN_REG17E, 0x88},
> + {PCIE_PHY_CMN_REG181, 0x87},
> + {PCIE_PHY_CMN_REG17E, 0x8C},
> + {PCIE_PHY_CMN_REG17E, 0x88},
> + /* 18 */
> + {PCIE_PHY_CMN_REG17E, 0x90},
> + {PCIE_PHY_CMN_REG181, 0x88},
> + {PCIE_PHY_CMN_REG17E, 0x94},
> + {PCIE_PHY_CMN_REG17E, 0x90},
> + /* 19 */
> + {PCIE_PHY_CMN_REG17E, 0x98},
> + {PCIE_PHY_CMN_REG181, 0x89},
> + {PCIE_PHY_CMN_REG17E, 0x9C},
> + {PCIE_PHY_CMN_REG17E, 0x98},
> +};
> +
> +
> +static void artpec8_pcie_phy_reg_writel(void __iomem *base, u32 val, u32 reg)
> +{
> + writel(val, base + reg);
No, do not create wrappers on writel. Remove entire function.
> +};
> +
> +static u32 artpec8_pcie_phy_reg_readl(void __iomem *base, u32 reg)
> +{
> + return readl(base + reg);
Ditto
> +};
> +
> +static void artpec8_pcie_phy_reg_update(void __iomem *base, u32 mask,
> + u32 update, u32 reg)
> +{
> + u32 val;
> +
> + val = artpec8_pcie_phy_reg_readl(base, reg);
> + val &= ~(mask);
> + val |= update;
> + artpec8_pcie_phy_reg_writel(base, val, reg);
> +};
> +
(...)
> +static int artpec8_pcie_phy_probe(struct platform_device *pdev)
> +{
> + struct device *dev = &pdev->dev;
> + struct artpec8_pcie_phy *artpec8_phy;
> + struct phy *generic_phy;
> + struct phy_provider *phy_provider;
> + const struct artpec8_pcie_phy_data *drv_data;
> +
> + drv_data = of_device_get_match_data(dev);
> + if (!drv_data)
> + return -ENODEV;
> +
> + artpec8_phy = devm_kzalloc(dev, sizeof(*artpec8_phy), GFP_KERNEL);
> + if (!artpec8_phy)
> + return -ENOMEM;
> +
> + /* reference clock */
> + if (of_property_read_u32(dev->of_node, "lcpll-ref-clk",
No, really, no...
All properties *must* be documented in the bindings. You cannot sneak in
some stuff here...
> + &artpec8_phy->lcpll_ref_clk)) {
> + return -EINVAL;
> + }
> + /* PLL SOC reference clock */
> + if (artpec8_phy->lcpll_ref_clk == REF_CLK_FROM_SOC_PLL) {
> + artpec8_phy->soc_pll_clk = devm_clk_get(dev, "ref_clk");
> + if (IS_ERR(artpec8_phy->soc_pll_clk))
> + return -EINVAL;
> + clk_prepare_enable(artpec8_phy->soc_pll_clk);
> + }
> +
> + /* link mode */
> + if (of_property_read_string(dev->of_node, "mode", &artpec8_phy->mode))
> + return -EINVAL;
> +
> + /* number of lanes */
> + if (of_property_read_u32(dev->of_node, "num-lanes",
> + &artpec8_phy->num_lanes))
> + return -EINVAL;
> +
> + if (artpec8_phy->num_lanes > LANE_MAX)
> + return -EINVAL;
> +
> + /* PHY base register */
> + artpec8_phy->phy_base = devm_platform_ioremap_resource_byname(pdev, "phy");
> + if (IS_ERR(artpec8_phy->phy_base))
> + return PTR_ERR(artpec8_phy->phy_base);
> +
> + /* PCS base register */
> + artpec8_phy->pcs_base = devm_platform_ioremap_resource_byname(pdev, "pcs");
> + if (IS_ERR(artpec8_phy->pcs_base))
> + return PTR_ERR(artpec8_phy->pcs_base);
> +
> + /* sysreg regmap handle, need to change using smc */
> + artpec8_phy->sysreg =
> + syscon_regmap_lookup_by_phandle(dev->of_node,
> + "samsung,fsys-sysreg");
Nope. Usage of undocumented properties. Please post your DTS changes, so
we can validate the user of this driver.
Best regards,
Krzysztof
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver
2022-06-03 16:03 ` Bjorn Helgaas
@ 2022-06-07 7:03 ` Jesper Nilsson
0 siblings, 0 replies; 18+ messages in thread
From: Jesper Nilsson @ 2022-06-07 7:03 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Wangseok Lee, robh+dt, krzk+dt, kishon, vkoul, linux-kernel,
Jesper Nilsson, Lars Persson, bhelgaas, linux-phy, linux-pci,
devicetree, lorenzo.pieralisi, kw, linux-arm-kernel, kernel,
Moon-Ki Jun, Sang Min Kim, Dongjin Yang
On Fri, Jun 03, 2022 at 06:03:14PM +0200, Bjorn Helgaas wrote:
> In the subject, why do you tag this "axis"? There's an existing
> pcie-artpec6.c that uses the driver name ""artpec6-pcie" and the
> subject line tag "artpec6".
>
> This adds pcie-artpec8.c with driver name "artpec8-pcie", so the
> obvious choice would be "artpec8".
>
> I assume you evaluated the possibility of extending artpec6 to support
> artpec8 in addition to the artpec6 and artpec7 it already supports?
I think that the artpec6 & 7 version of the IP is quite different
in IP version, IP configuration and the glue-logic around the DWC IP.
Obviously integration of the IP is Samsung based, which artpec6 and 7 wasn't.
Even the IP supported by the old Exynos version of the driver seems
quite different in it's intergration. :-(
> On Fri, Jun 03, 2022 at 11:34:52AM +0900, Wangseok Lee wrote:
> > +#define LTSSM_STATE_L0 0x11
> > +
> > +/* FSYS SYSREG Offsets */
>
> The list below seems to inclue more than just register offsets.
... as I have some internal knowledge I can confirm that these are
glue logic registers and fields specific for ARTPEC-8, which
is what the comment "FSYS SYSREG Offsets" above very cryptically states.
Would this be clearer? "FSYS glue logic system registers"
> > +#define FSYS_PCIE_CON 0x424
> > +#define PCIE_PERSTN BIT(5)
> > +#define FSYS_PCIE_DBI_ADDR_CON 0x428
> > +#define FSYS_PCIE_DBI_ADDR_OVR_CDM 0x00
> > +#define FSYS_PCIE_DBI_ADDR_OVR_SHADOW 0x12
> > +#define FSYS_PCIE_DBI_ADDR_OVR_ATU 0x36
> > +
> > +/* PMU SYSCON Offsets */
And similarly:
PMU glue logic system registers
> > +#define PMU_SYSCON_PCIE_ISOLATION 0x3200
> > +
> > +/* BUS P/S SYSCON Offsets */
> > +#define BUS_SYSCON_BUS_PATH_ENABLE 0x0
> > +
> > +int artpec8_pcie_dbi_addr_con[] = {
> > + FSYS_PCIE_DBI_ADDR_CON
> > +};
> > +
> > +struct artpec8_pcie {
> > + struct dw_pcie *pci;
> > + struct clk *pipe_clk;
> > + struct clk *dbi_clk;
> > + struct clk *mstr_clk;
> > + struct clk *slv_clk;
> > + const struct artpec8_pcie_pdata *pdata;
> > + void __iomem *elbi_base;
> > + struct regmap *sysreg;
> > + struct regmap *pmu_syscon;
> > + struct regmap *bus_s_syscon;
> > + struct regmap *bus_p_syscon;
> > + enum dw_pcie_device_mode mode;
> > + int link_id;
> > + /* For Generic PHY Framework */
>
> Superfluous comment.
>
> > + struct phy *phy;
> > +};
> > +
> > +struct artpec8_pcie_res_ops {
> > + int (*get_mem_resources)(struct platform_device *pdev,
> > + struct artpec8_pcie *artpec8_ctrl);
> > + int (*get_clk_resources)(struct platform_device *pdev,
> > + struct artpec8_pcie *artpec8_ctrl);
> > + int (*init_clk_resources)(struct artpec8_pcie *artpec8_ctrl);
> > + void (*deinit_clk_resources)(struct artpec8_pcie *artpec8_ctrl);
> > +};
> > +
> > +struct artpec8_pcie_pdata {
> > + const struct dw_pcie_ops *dwc_ops;
> > + const struct dw_pcie_host_ops *host_ops;
>
> Fix indentation to match surrounding code.
>
> > + const struct artpec8_pcie_res_ops *res_ops;
> > + enum dw_pcie_device_mode mode;
> > +};
> > +
> > +enum artpec8_pcie_isolation {
> > + PCIE_CLEAR_ISOLATION = 0,
> > + PCIE_SET_ISOLATION = 1
> > +};
> > +
> > +enum artpec8_pcie_reg_bit {
> > + PCIE_REG_BIT_LOW = 0,
> > + PCIE_REG_BIT_HIGH = 1
> > +};
> > +
> > +static void artpec8_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
> > + u32 reg, size_t size, u32 val);
> > +static u32 artpec8_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
> > + u32 reg, size_t size);
> > +static void artpec8_pcie_writel(void __iomem *base, u32 val, u32 reg);
>
> Can you reorder the function definitions to avoid the need for these
> forward declarations?
>
> > +static int artpec8_pcie_get_subsystem_resources(struct platform_device *pdev,
> > + struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + struct device *dev = &pdev->dev;
> > +
> > + /* External Local Bus interface(ELBI) Register */
> > + artpec8_ctrl->elbi_base = devm_platform_ioremap_resource_byname(pdev, "elbi");
>
> Rewrap to fit in 80 columns.
>
> > + if (IS_ERR(artpec8_ctrl->elbi_base)) {
> > + dev_err(dev, "failed to map elbi_base\n");
> > + return PTR_ERR(artpec8_ctrl->elbi_base);
> > + }
> > +
> > + /* fsys sysreg regmap handle */
>
> All these comments are superfluous since they only repeat the lookup
> arguments.
>
> > + artpec8_ctrl->sysreg =
> > + syscon_regmap_lookup_by_phandle(dev->of_node,
>
> The above two lines should fit on one line.
>
> > + "samsung,fsys-sysreg");
> > + if (IS_ERR(artpec8_ctrl->sysreg)) {
> > + dev_err(dev, "fsys sysreg regmap lookup failed.\n");
> > + return PTR_ERR(artpec8_ctrl->sysreg);
> > + }
> > +
> > + /* pmu syscon regmap handle */
> > + artpec8_ctrl->pmu_syscon = syscon_regmap_lookup_by_phandle(dev->of_node,
> > + "samsung,syscon-phandle");
> > + if (IS_ERR(artpec8_ctrl->pmu_syscon)) {
> > + dev_err(dev, "pmu syscon regmap lookup failed.\n");
> > + return PTR_ERR(artpec8_ctrl->pmu_syscon);
> > + }
> > +
> > + /* bus s syscon regmap handle */
> > + artpec8_ctrl->bus_s_syscon =
> > + syscon_regmap_lookup_by_phandle(dev->of_node,
> > + "samsung,syscon-bus-s-fsys");
> > + if (IS_ERR(artpec8_ctrl->bus_s_syscon)) {
> > + dev_err(dev, "bus_s_syscon regmap lookup failed.\n");
> > + return PTR_ERR(artpec8_ctrl->bus_s_syscon);
> > + }
> > +
> > + /* bus p syscon regmap handle */
> > + artpec8_ctrl->bus_p_syscon =
> > + syscon_regmap_lookup_by_phandle(dev->of_node,
> > + "samsung,syscon-bus-p-fsys");
> > + if (IS_ERR(artpec8_ctrl->bus_p_syscon)) {
> > + dev_err(dev, "bus_p_syscon regmap lookup failed.\n");
> > + return PTR_ERR(artpec8_ctrl->bus_p_syscon);
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int artpec8_pcie_get_rc_mem_resources(struct platform_device *pdev,
> > + struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + struct dw_pcie *pci = artpec8_ctrl->pci;
> > +
> > + /* Data Bus Interface(DBI) Register */
> > + pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> > + if (IS_ERR(pci->dbi_base))
> > + return PTR_ERR(pci->dbi_base);
> > +
> > + return 0;
> > +}
> > +
> > +static int artpec8_pcie_get_ep_mem_resources(struct platform_device *pdev,
> > + struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + struct dw_pcie_ep *ep;
> > + struct dw_pcie *pci = artpec8_ctrl->pci;
> > + struct device *dev = &pdev->dev;
> > + struct resource *res;
> > +
> > + ep = &pci->ep;
>
> Reorder the locals above:
>
> struct dw_pcie *pci = artpec8_ctrl->pci;
> struct device *dev = &pdev->dev;
> struct dw_pcie_ep *ep = &pci->ep;
> struct resource *res;
>
> Then they're in the order you use them and you don't need the extra
> "ep = &pci->ep".
>
> > + pci->dbi_base = devm_platform_ioremap_resource_byname(pdev, "dbi");
> > + if (IS_ERR(pci->dbi_base)) {
> > + dev_err(dev, "failed to map ep_dbics\n");
> > + return -ENOMEM;
> > + }
> > +
> > + pci->dbi_base2 = devm_platform_ioremap_resource_byname(pdev, "dbi2");
> > + if (IS_ERR(pci->dbi_base2)) {
> > + dev_err(dev, "failed to map ep_dbics2\n");
> > + return -ENOMEM;
> > + }
> > +
> > + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "addr_space");
> > + if (!res)
> > + return -EINVAL;
> > + ep->phys_base = res->start;
> > + ep->addr_size = resource_size(res);
> > +
> > + return 0;
> > +}
> > +
> > +static int artpec8_pcie_get_clk_resources(struct platform_device *pdev,
> > + struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + struct device *dev = &pdev->dev;
> > +
> > + artpec8_ctrl->pipe_clk = devm_clk_get(dev, "pipe_clk");
> > + if (IS_ERR(artpec8_ctrl->pipe_clk)) {
> > + dev_err(dev, "couldn't get pipe clock\n");
> > + return -EINVAL;
> > + }
> > +
> > + artpec8_ctrl->dbi_clk = devm_clk_get(dev, "dbi_clk");
> > + if (IS_ERR(artpec8_ctrl->dbi_clk)) {
> > + dev_info(dev, "couldn't get dbi clk\n");
> > + return -EINVAL;
> > + }
> > +
> > + artpec8_ctrl->slv_clk = devm_clk_get(dev, "slv_clk");
> > + if (IS_ERR(artpec8_ctrl->slv_clk)) {
> > + dev_err(dev, "couldn't get slave clock\n");
> > + return -EINVAL;
> > + }
> > +
> > + artpec8_ctrl->mstr_clk = devm_clk_get(dev, "mstr_clk");
> > + if (IS_ERR(artpec8_ctrl->mstr_clk)) {
> > + dev_info(dev, "couldn't get master clk\n");
>
> It'd be nice if the err/info messages matched the exact DT name:
> "pipe_clk", "dbi_clk", slv_clk", etc.
>
> Why are some of the above dev_err() and others dev_info() when you
> return -EINVAL in all cases?
>
> > + return -EINVAL;
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static int artpec8_pcie_init_clk_resources(struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + clk_prepare_enable(artpec8_ctrl->pipe_clk);
> > + clk_prepare_enable(artpec8_ctrl->dbi_clk);
> > + clk_prepare_enable(artpec8_ctrl->mstr_clk);
> > + clk_prepare_enable(artpec8_ctrl->slv_clk);
> > +
> > + return 0;
> > +}
> > +
> > +static void artpec8_pcie_deinit_clk_resources(struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + clk_disable_unprepare(artpec8_ctrl->slv_clk);
> > + clk_disable_unprepare(artpec8_ctrl->mstr_clk);
> > + clk_disable_unprepare(artpec8_ctrl->dbi_clk);
> > + clk_disable_unprepare(artpec8_ctrl->pipe_clk);
> > +}
> > +
> > +static const struct artpec8_pcie_res_ops artpec8_pcie_rc_res_ops = {
> > + .get_mem_resources = artpec8_pcie_get_rc_mem_resources,
> > + .get_clk_resources = artpec8_pcie_get_clk_resources,
> > + .init_clk_resources = artpec8_pcie_init_clk_resources,
> > + .deinit_clk_resources = artpec8_pcie_deinit_clk_resources,
> > +};
> > +
> > +static const struct artpec8_pcie_res_ops artpec8_pcie_ep_res_ops = {
> > + .get_mem_resources = artpec8_pcie_get_ep_mem_resources,
> > + .get_clk_resources = artpec8_pcie_get_clk_resources,
> > + .init_clk_resources = artpec8_pcie_init_clk_resources,
> > + .deinit_clk_resources = artpec8_pcie_deinit_clk_resources,
> > +};
> > +
> > +static void artpec8_pcie_writel(void __iomem *base, u32 val, u32 reg)
> > +{
> > + writel(val, base + reg);
> > +}
> > +
> > +static u32 artpec8_pcie_readl(void __iomem *base, u32 reg)
> > +{
> > + return readl(base + reg);
> > +}
> > +
> > +static int artpec8_pcie_config_phy_power_isolation(struct dw_pcie *pci,
> > + enum artpec8_pcie_reg_bit val)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + int ret;
> > +
> > + ret = regmap_write(artpec8_ctrl->pmu_syscon, PMU_SYSCON_PCIE_ISOLATION,
> > + val);
> > +
> > + return ret;
>
> return regmap_write(artpec8_ctrl->pmu_syscon, ...);
>
> > +}
> > +
> > +static int artpec8_pcie_config_bus_enable(struct dw_pcie *pci,
> > + enum artpec8_pcie_reg_bit val)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + int ret;
> > +
> > + ret = regmap_write(artpec8_ctrl->bus_p_syscon,
> > + BUS_SYSCON_BUS_PATH_ENABLE, val);
> > + if (ret)
> > + return ret;
> > +
> > + ret = regmap_write(artpec8_ctrl->bus_s_syscon,
> > + BUS_SYSCON_BUS_PATH_ENABLE, val);
> > + if (ret)
> > + return ret;
> > +
> > + return ret;
>
> return regmap_write(artpec8_ctrl->bus_s_syscon, ...);
>
> > +}
> > +
> > +static int artpec8_pcie_config_isolation(struct dw_pcie *pci,
> > + enum artpec8_pcie_isolation val)
> > +{
> > + int ret;
> > + /* reg_val[0] : for phy power isolation */
> > + /* reg_val[1] : for bus enable */
> > + enum artpec8_pcie_reg_bit reg_val[2];
> > +
> > + switch (val) {
> > + case PCIE_CLEAR_ISOLATION:
> > + reg_val[0] = PCIE_REG_BIT_LOW;
> > + reg_val[1] = PCIE_REG_BIT_HIGH;
> > + break;
> > + case PCIE_SET_ISOLATION:
> > + reg_val[0] = PCIE_REG_BIT_HIGH;
> > + reg_val[1] = PCIE_REG_BIT_LOW;
> > + break;
> > + default:
> > + return -EINVAL;
> > + }
> > +
> > + ret = artpec8_pcie_config_phy_power_isolation(pci, reg_val[0]);
> > + if (ret)
> > + return ret;
> > +
> > + ret = artpec8_pcie_config_bus_enable(pci, reg_val[1]);
> > + if (ret)
> > + return ret;
> > +
> > + return ret;
>
> return artpec8_pcie_config_bus_enable(pci, ...);
>
> > +}
> > +
> > +static int artpec8_pcie_config_perstn(struct dw_pcie *pci,
> > + enum artpec8_pcie_reg_bit val)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + unsigned int bits;
> > + int ret;
> > +
> > + if (val == PCIE_REG_BIT_HIGH)
> > + bits = PCIE_PERSTN;
> > + else
> > + bits = 0;
> > +
> > + ret = regmap_update_bits(artpec8_ctrl->sysreg, FSYS_PCIE_CON,
> > + PCIE_PERSTN, bits);
> > +
> > + return ret;
>
> return regmap_update_bits(artpec8_ctrl->sysreg, ...):
>
> > +}
> > +
> > +static void artpec8_pcie_stop_link(struct dw_pcie *pci)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + u32 val;
> > +
> > + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
> > + PCIE_APP_LTSSM_ENABLE);
> > +
> > + val &= ~PCIE_ELBI_LTSSM_ENABLE;
> > + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
> > + PCIE_APP_LTSSM_ENABLE);
> > +}
> > +
> > +static int artpec8_pcie_start_link(struct dw_pcie *pci)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + u32 val;
> > +
> > + dw_pcie_dbi_ro_wr_en(pci);
> > +
> > + /* Equalization disable */
> > + val = artpec8_pcie_read_dbi(pci, pci->dbi_base, PCIE_GEN3_RELATED_OFF,
> > + 4);
> > + artpec8_pcie_write_dbi(pci, pci->dbi_base, PCIE_GEN3_RELATED_OFF, 4,
> > + val | PCIE_GEN3_EQUALIZATION_DISABLE);
> > +
> > + dw_pcie_dbi_ro_wr_dis(pci);
> > +
> > + /* assert LTSSM enable */
> > + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
> > + PCIE_APP_LTSSM_ENABLE);
> > +
> > + val |= PCIE_ELBI_LTSSM_ENABLE;
> > + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
> > + PCIE_APP_LTSSM_ENABLE);
> > +
> > + return 0;
> > +}
> > +
> > +static irqreturn_t artpec8_pcie_msi_irq_handler(int irq, void *arg)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = arg;
> > + struct dw_pcie *pci = artpec8_ctrl->pci;
> > + struct pcie_port *pp = &pci->pp;
> > + u32 val;
> > +
> > + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base, PCIE_IRQ2_STS);
> > +
> > + if ((val & IRQ_MSI_ENABLE) == IRQ_MSI_ENABLE) {
> > + val &= IRQ_MSI_ENABLE;
> > + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val,
> > + PCIE_IRQ2_STS);
> > + dw_handle_msi_irq(pp);
> > + }
> > +
> > + return IRQ_HANDLED;
> > +}
> > +
> > +static void artpec8_pcie_msi_init(struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + u32 val;
> > +
> > + /* enable MSI interrupt */
> > + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base, PCIE_IRQ2_EN);
> > + val |= IRQ_MSI_ENABLE;
> > + artpec8_pcie_writel(artpec8_ctrl->elbi_base, val, PCIE_IRQ2_EN);
> > +}
> > +
> > +static void artpec8_pcie_enable_interrupts(struct artpec8_pcie *artpec8_ctrl)
> > +{
> > + if (IS_ENABLED(CONFIG_PCI_MSI))
> > + artpec8_pcie_msi_init(artpec8_ctrl);
> > +}
> > +
> > +static u32 artpec8_pcie_read_dbi(struct dw_pcie *pci, void __iomem *base,
> > + u32 reg, size_t size)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + u32 val;
> > + bool is_atu = false;
> > +
> > + if (base == pci->atu_base) {
> > + is_atu = true;
> > + base = pci->dbi_base;
> > + regmap_write(artpec8_ctrl->sysreg,
> > + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> > + FSYS_PCIE_DBI_ADDR_OVR_ATU);
> > + }
> > +
> > + dw_pcie_read(base + reg, size, &val);
> > +
> > + if (is_atu)
> > + regmap_write(artpec8_ctrl->sysreg,
> > + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> > + FSYS_PCIE_DBI_ADDR_OVR_CDM);
> > +
> > + return val;
> > +}
> > +
> > +static void artpec8_pcie_write_dbi(struct dw_pcie *pci, void __iomem *base,
> > + u32 reg, size_t size, u32 val)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + bool is_atu = false;
> > +
> > + if (base == pci->atu_base) {
> > + is_atu = true;
> > + base = pci->dbi_base;
> > + regmap_write(artpec8_ctrl->sysreg,
> > + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> > + FSYS_PCIE_DBI_ADDR_OVR_ATU);
> > + }
> > +
> > + dw_pcie_write(base + reg, size, val);
> > +
> > + if (is_atu)
> > + regmap_write(artpec8_ctrl->sysreg,
> > + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> > + FSYS_PCIE_DBI_ADDR_OVR_CDM);
> > +}
> > +
> > +static void artpec8_pcie_write_dbi2(struct dw_pcie *pci, void __iomem *base,
> > + u32 reg, size_t size, u32 val)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > +
> > + regmap_write(artpec8_ctrl->sysreg,
> > + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> > + FSYS_PCIE_DBI_ADDR_OVR_SHADOW);
> > +
> > + dw_pcie_write(base + reg, size, val);
> > +
> > + regmap_write(artpec8_ctrl->sysreg,
> > + artpec8_pcie_dbi_addr_con[artpec8_ctrl->link_id],
> > + FSYS_PCIE_DBI_ADDR_OVR_CDM);
> > +}
> > +
> > +static int artpec8_pcie_rd_own_conf(struct pci_bus *bus, unsigned int devfn,
> > + int where, int size, u32 *val)
> > +{
> > + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
> > +
> > + if (PCI_SLOT(devfn)) {
> > + *val = ~0;
>
> PCI_SET_ERROR_RESPONSE(val);
>
> > + return PCIBIOS_DEVICE_NOT_FOUND;
> > + }
> > +
> > + *val = dw_pcie_read_dbi(pci, where, size);
> > + return PCIBIOS_SUCCESSFUL;
> > +}
> > +
> > +static int artpec8_pcie_wr_own_conf(struct pci_bus *bus, unsigned int devfn,
> > + int where, int size, u32 val)
> > +{
> > + struct dw_pcie *pci = to_dw_pcie_from_pp(bus->sysdata);
> > +
> > + if (PCI_SLOT(devfn))
> > + return PCIBIOS_DEVICE_NOT_FOUND;
> > +
> > + dw_pcie_write_dbi(pci, where, size, val);
> > + return PCIBIOS_SUCCESSFUL;
> > +}
> > +
> > +static struct pci_ops artpec8_pci_ops = {
> > + .read = artpec8_pcie_rd_own_conf,
> > + .write = artpec8_pcie_wr_own_conf,
> > +};
> > +
> > +static int artpec8_pcie_link_up(struct dw_pcie *pci)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > + u32 val;
> > +
> > + val = artpec8_pcie_readl(artpec8_ctrl->elbi_base,
> > + PCIE_ELBI_CXPL_DEBUG_00_31);
> > +
> > + return (val & LTSSM_STATE_MASK) == LTSSM_STATE_L0;
> > +}
> > +
> > +static int artpec8_pcie_host_init(struct pcie_port *pp)
> > +{
> > + struct dw_pcie *pci = to_dw_pcie_from_pp(pp);
> > + struct artpec8_pcie *artpec8_ctrl = to_artpec8_pcie(pci);
> > +
> > + pp->bridge->ops = &artpec8_pci_ops;
> > +
> > + dw_pcie_writel_dbi(pci, PCIE_GEN3_RELATED_OFF,
> > + (PCIE_GEN3_EQ_PHASE_2_3 |
> > + PCIE_GEN3_RXEQ_PH01_EN |
> > + PCIE_GEN3_RXEQ_RGRDLESS_RXTS));
> > +
> > + artpec8_pcie_enable_interrupts(artpec8_ctrl);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct dw_pcie_host_ops artpec8_pcie_host_ops = {
> > + .host_init = artpec8_pcie_host_init,
> > +};
> > +
> > +static u8 artpec8_pcie_iatu_unroll_enabled(struct dw_pcie *pci)
> > +{
> > + u32 val;
> > +
> > + val = dw_pcie_readl_dbi(pci, PCIE_ATU_VIEWPORT);
> > + pci->atu_base = pci->dbi_base + DEFAULT_DBI_ATU_OFFSET;
> > +
> > + if (val == 0xffffffff)
> > + return 1;
> > +
> > + return 0;
> > +}
> > +
> > +static void artpec8_pcie_ep_init(struct dw_pcie_ep *ep)
> > +{
> > + struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > + enum pci_barno bar;
>
> Add blank line here and use usual multi-line comment style:
>
> /*
> * Currently PCIe EP core is not ...
>
> > + /* Currently PCIe EP core is not setting iatu_unroll_enabled
> > + * so let's handle it here. We need to find proper place to
> > + * initialize this so that it can be used as for other EP
>
> ... can be used for ...
>
> > + * controllers as well.
> > + */
> > + pci->iatu_unroll_enabled = artpec8_pcie_iatu_unroll_enabled(pci);
> > +
> > + for (bar = BAR_0; bar <= BAR_5; bar++)
> > + dw_pcie_ep_reset_bar(pci, bar);
> > +}
> > +
> > +static int artpec8_pcie_raise_irq(struct dw_pcie_ep *ep, u8 func_no,
> > + enum pci_epc_irq_type type, u16 interrupt_num)
> > +{
> > + struct dw_pcie *pci = to_dw_pcie_from_ep(ep);
> > +
> > + switch (type) {
> > + case PCI_EPC_IRQ_LEGACY:
> > + return -EINVAL;
> > + case PCI_EPC_IRQ_MSI:
> > + return dw_pcie_ep_raise_msi_irq(ep, func_no, interrupt_num);
> > + default:
> > + dev_err(pci->dev, "UNKNOWN IRQ type\n");
> > + }
> > +
> > + return 0;
> > +}
> > +
> > +static const struct pci_epc_features artpec8_pcie_epc_features = {
> > + .linkup_notifier = false,
> > + .msi_capable = true,
> > + .msix_capable = false,
> > +};
> > +
> > +static const struct pci_epc_features*
> > +artpec8_pcie_ep_get_features(struct dw_pcie_ep *ep)
> > +{
> > + return &artpec8_pcie_epc_features;
> > +}
> > +
> > +static const struct dw_pcie_ep_ops artpec8_dw_pcie_ep_ops = {
> > + .ep_init = artpec8_pcie_ep_init,
> > + .raise_irq = artpec8_pcie_raise_irq,
> > + .get_features = artpec8_pcie_ep_get_features,
> > +};
> > +
> > +static int __init artpec8_add_pcie_ep(struct artpec8_pcie *artpec8_ctrl,
> > + struct platform_device *pdev)
> > +{
> > + int ret;
> > + struct dw_pcie_ep *ep;
> > + struct dw_pcie *pci = artpec8_ctrl->pci;
> > +
> > + ep = &pci->ep;
>
> Reorder locals and initialize ep as above.
>
> > + ep->ops = &artpec8_dw_pcie_ep_ops;
> > +
> > + dw_pcie_writel_dbi(pci, PCIE_GEN3_RELATED_OFF,
> > + (PCIE_GEN3_EQ_PHASE_2_3 |
> > + PCIE_GEN3_RXEQ_PH01_EN |
> > + PCIE_GEN3_RXEQ_RGRDLESS_RXTS));
> > +
> > + ret = dw_pcie_ep_init(ep);
> > + if (ret)
> > + return ret;
> > +
> > + return 0;
> > +}
> > +
> > +static int __init artpec8_add_pcie_port(struct artpec8_pcie *artpec8_ctrl,
> > + struct platform_device *pdev)
> > +{
> > + struct dw_pcie *pci = artpec8_ctrl->pci;
> > + struct pcie_port *pp = &pci->pp;
> > + struct device *dev = &pdev->dev;
> > + int ret;
> > + int irq_flags;
> > + int irq;
>
> Reorder to be in order of use:
>
> struct dw_pcie *pci = artpec8_ctrl->pci;
> struct pcie_port *pp = &pci->pp;
> struct device *dev = &pdev->dev;
> int irq;
> int irq_flags;
> int ret;
>
> > +
> > + if (IS_ENABLED(CONFIG_PCI_MSI)) {
> > + irq = platform_get_irq_byname(pdev, "intr");
> > + if (!irq)
> > + return -ENODEV;
> > +
> > + irq_flags = IRQF_SHARED | IRQF_NO_THREAD;
> > +
> > + ret = devm_request_irq(dev, irq, artpec8_pcie_msi_irq_handler,
> > + irq_flags, "artpec8-pcie", artpec8_ctrl);
> > + if (ret)
> > + return ret;
> > + }
> > +
> > + /* Prevent core for messing with the IRQ, since it's muxed */
>
> Prevent core from ...
>
> > + pp->msi_irq = -ENODEV;
> > +
> > + ret = dw_pcie_host_init(pp);
> > + if (ret)
> > + return ret;
> > +
> > + return 0;
>
> return dw_pcie_host_init(pp);
>
> > +}
> > +
> > +static const struct dw_pcie_ops artpec8_dw_pcie_ops = {
> > + .read_dbi = artpec8_pcie_read_dbi,
> > + .write_dbi = artpec8_pcie_write_dbi,
> > + .write_dbi2 = artpec8_pcie_write_dbi2,
> > + .start_link = artpec8_pcie_start_link,
> > + .stop_link = artpec8_pcie_stop_link,
> > + .link_up = artpec8_pcie_link_up,
> > +};
> > +
> > +static int artpec8_pcie_probe(struct platform_device *pdev)
> > +{
> > + int ret;
> > + struct dw_pcie *pci;
> > + struct pcie_port *pp;
> > + struct artpec8_pcie *artpec8_ctrl;
> > + enum dw_pcie_device_mode mode;
> > + struct device *dev = &pdev->dev;
> > + const struct artpec8_pcie_pdata *pdata;
> > + struct device_node *np = dev->of_node;
>
> Reorder in order of use.
>
> > + artpec8_ctrl = devm_kzalloc(dev, sizeof(*artpec8_ctrl), GFP_KERNEL);
> > + if (!artpec8_ctrl)
> > + return -ENOMEM;
> > +
> > + pci = devm_kzalloc(dev, sizeof(*pci), GFP_KERNEL);
> > + if (!pci)
> > + return -ENOMEM;
> > +
> > + pdata = (const struct artpec8_pcie_pdata *)
>
> Unnecessary cast.
>
> > + of_device_get_match_data(dev);
> > + if (!pdata)
> > + return -ENODEV;
> > +
> > + mode = (enum dw_pcie_device_mode)pdata->mode;
> > +
> > + artpec8_ctrl->pci = pci;
> > + artpec8_ctrl->pdata = pdata;
> > + artpec8_ctrl->mode = mode;
> > +
> > + pci->dev = dev;
> > + pci->ops = pdata->dwc_ops;
> > + pci->dbi_base2 = NULL;
> > + pci->dbi_base = NULL;
> > + pp = &pci->pp;
> > + pp->ops = artpec8_ctrl->pdata->host_ops;
> > +
> > + if (mode == DW_PCIE_RC_TYPE)
> > + artpec8_ctrl->link_id = of_alias_get_id(np, "pcierc");
> > + else
> > + artpec8_ctrl->link_id = of_alias_get_id(np, "pcieep");
> > +
> > + ret = artpec8_pcie_get_subsystem_resources(pdev, artpec8_ctrl);
> > + if (ret)
> > + return ret;
> > +
> > + if (pdata->res_ops && pdata->res_ops->get_mem_resources) {
> > + ret = pdata->res_ops->get_mem_resources(pdev, artpec8_ctrl);
> > + if (ret)
> > + return ret;
> > + }
> > +
> > + if (pdata->res_ops && pdata->res_ops->get_clk_resources) {
> > + ret = pdata->res_ops->get_clk_resources(pdev, artpec8_ctrl);
> > + if (ret)
> > + return ret;
> > +
> > + ret = pdata->res_ops->init_clk_resources(artpec8_ctrl);
> > + if (ret)
> > + return ret;
> > + }
> > +
> > + platform_set_drvdata(pdev, artpec8_ctrl);
> > +
> > + ret = artpec8_pcie_config_isolation(pci, PCIE_CLEAR_ISOLATION);
> > + if (ret)
> > + return ret;
> > +
> > + ret = artpec8_pcie_config_perstn(pci, PCIE_REG_BIT_HIGH);
> > + if (ret)
> > + return ret;
> > +
> > + artpec8_ctrl->phy = devm_of_phy_get(dev, np, NULL);
> > + if (IS_ERR(artpec8_ctrl->phy))
> > + return PTR_ERR(artpec8_ctrl->phy);
> > +
> > + phy_init(artpec8_ctrl->phy);
> > + phy_reset(artpec8_ctrl->phy);
> > +
> > + switch (mode) {
> > + case DW_PCIE_RC_TYPE:
> > + artpec8_pcie_writel(artpec8_ctrl->elbi_base, DEVICE_TYPE_RC,
> > + PCIE_ARTPEC8_DEVICE_TYPE);
> > + ret = artpec8_add_pcie_port(artpec8_ctrl, pdev);
> > + if (ret < 0)
>
> Are there positive return values that indicate success? Most places
> above you assume "ret != 0" means failure, so just curious why you
> test "ret < 0" instead of just "ret".
>
> > + goto fail_probe;
> > + break;
> > + case DW_PCIE_EP_TYPE:
> > + artpec8_pcie_writel(artpec8_ctrl->elbi_base, DEVICE_TYPE_EP,
> > + PCIE_ARTPEC8_DEVICE_TYPE);
> > +
> > + ret = artpec8_add_pcie_ep(artpec8_ctrl, pdev);
> > + if (ret < 0)
>
> Same question.
>
> > + goto fail_probe;
> > + break;
> > + default:
> > + ret = -EINVAL;
> > + goto fail_probe;
> > + }
> > +
> > + return 0;
> > +
> > +fail_probe:
> > + phy_exit(artpec8_ctrl->phy);
> > + if (pdata->res_ops && pdata->res_ops->deinit_clk_resources)
> > + pdata->res_ops->deinit_clk_resources(artpec8_ctrl);
> > +
> > + return ret;
> > +}
> > +
> > +static int __exit artpec8_pcie_remove(struct platform_device *pdev)
> > +{
> > + struct artpec8_pcie *artpec8_ctrl = platform_get_drvdata(pdev);
> > + const struct artpec8_pcie_pdata *pdata = artpec8_ctrl->pdata;
> > +
> > + if (pdata->res_ops && pdata->res_ops->deinit_clk_resources)
> > + pdata->res_ops->deinit_clk_resources(artpec8_ctrl);
> > +
> > + return 0;
> > +}
> > +
> > +static const struct artpec8_pcie_pdata artpec8_pcie_rc_pdata = {
> > + .dwc_ops = &artpec8_dw_pcie_ops,
> > + .host_ops = &artpec8_pcie_host_ops,
> > + .res_ops = &artpec8_pcie_rc_res_ops,
> > + .mode = DW_PCIE_RC_TYPE,
> > +};
> > +
> > +static const struct artpec8_pcie_pdata artpec8_pcie_ep_pdata = {
> > + .dwc_ops = &artpec8_dw_pcie_ops,
> > + .host_ops = &artpec8_pcie_host_ops,
> > + .res_ops = &artpec8_pcie_ep_res_ops,
> > + .mode = DW_PCIE_EP_TYPE,
> > +};
> > +
> > +static const struct of_device_id artpec8_pcie_of_match[] = {
> > + {
> > + .compatible = "axis,artpec8-pcie",
> > + .data = &artpec8_pcie_rc_pdata,
> > + },
> > + {
> > + .compatible = "axis,artpec8-pcie-ep",
> > + .data = &artpec8_pcie_ep_pdata,
> > + },
> > + {},
> > +};
> > +MODULE_DEVICE_TABLE(of, artpec8_pcie_of_match);
> > +
> > +static struct platform_driver artpec8_pcie_driver = {
> > + .probe = artpec8_pcie_probe,
> > + .remove = __exit_p(artpec8_pcie_remove),
> > + .driver = {
> > + .name = "artpec8-pcie",
> > + .of_match_table = artpec8_pcie_of_match,
> > + },
> > +};
> > +
> > +module_platform_driver(artpec8_pcie_driver);
> > +
> > +MODULE_LICENSE("GPL");
> > +MODULE_AUTHOR("Jaeho Cho <jaeho79.cho@samsung.com>");
/^JN - Jesper Nilsson
--
Jesper Nilsson -- jesper.nilsson@axis.com
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 5/5] MAINTAINERS: Add maintainer for Axis ARTPEC-8 PCIe PHY driver
2022-06-03 16:09 ` Bjorn Helgaas
@ 2022-06-07 7:05 ` Jesper Nilsson
0 siblings, 0 replies; 18+ messages in thread
From: Jesper Nilsson @ 2022-06-07 7:05 UTC (permalink / raw)
To: Bjorn Helgaas
Cc: Wangseok Lee, robh+dt, krzk+dt, kishon, vkoul, linux-kernel,
Jesper Nilsson, Lars Persson, bhelgaas, linux-phy, linux-pci,
devicetree, lorenzo.pieralisi, kw, linux-arm-kernel, kernel,
Moon-Ki Jun, Sang Min Kim, Dongjin Yang
On Fri, Jun 03, 2022 at 06:09:13PM +0200, Bjorn Helgaas wrote:
> In subject:
>
> MAINTAINERS: Add Axis ARTPEC-8 PCIe PHY maintainers
>
> to put the important things first so they don't get chopped off by
> "git log --oneline" and similar.
>
> On Fri, Jun 03, 2022 at 11:43:47AM +0900, Wangseok Lee wrote:
> > Add maintainer for Axis ARTPEC-8 PCIe PHY.
> >
> > Add Jesper Nilsson <jesper.nilsson@axis.com> and
> > Lars Persson <lars.persson@axis.com> as Maintainer for these files.
>
> s/Maintainer/maintainers/
>
> > ARTPEC-8 is the SoC platform of Axis Communications
> > and PCIe phy is designed based on Samsung PHY.
>
> s/phy/PHY/ to match other uses.
>
> Rewrap all of above to fill 75 columns.
>
> > Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
>
> Obviously we'll look for acks from Jesper and Lars.
:-)
> Also would be good if Jesper explicitly acked the fact that his
> existing "PCIE DRIVER FOR AXIS ARTPEC" entry also matches the new
> pcie-artpec8.c driver:
>
> PCIE DRIVER FOR AXIS ARTPEC
> M: Jesper Nilsson <jesper.nilsson@axis.com>
> L: linux-arm-kernel@axis.com
> L: linux-pci@vger.kernel.org
> S: Maintained
> F: Documentation/devicetree/bindings/pci/axis,artpec*
> F: drivers/pci/controller/dwc/*artpec*
Yes, both the ARTPEC-6 and ARTPEC-8 models of the DWC PCIe drivers
is intended to match this entry.
It can be made explicit if that is preferred.
/^JN - Jesper Nilsson
--
Jesper Nilsson -- jesper.nilsson@axis.com
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p8>
@ 2022-06-08 3:30 ` Wangseok Lee
0 siblings, 0 replies; 18+ messages in thread
From: Wangseok Lee @ 2022-06-08 3:30 UTC (permalink / raw)
To: Krzysztof Kozlowski, Wangseok Lee, robh+dt, krzk+dt, kishon,
vkoul, linux-kernel, jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang, Yeeun Kim
On 06/06/2022 19:12, Krzysztof Kozlowski wrote:
> On 03/06/2022 04:23, Wangseok Lee wrote:
>> Add description to support Axis, ARTPEC-8 SoC.
>> ARTPEC-8 is the SoC platform of Axis Communications
>> and PCIe controller is designed based on Design-Ware PCIe controller.
>>
>> changes since v1 :
>
> Changelog goes after --- .
>
Ok, i check the linux commit style.
I will fix it.
>> -'make dt_binding_check' result improvement
>> -Add the missing property list
>> -Align the indentation of continued lines/entries
>>
>> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
>> ---
>> .../bindings/pci/axis,artpec8-pcie-ep.yaml | 108 ++++++++++++++++++
>> .../devicetree/bindings/pci/axis,artpec8-pcie.yaml | 123 +++++++++++++++++++++
>> 2 files changed, 231 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
>> create mode 100644 Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
>> new file mode 100644
>> index 0000000..3512e38
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie-ep.yaml
>> @@ -0,0 +1,108 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: https://protect2.fireeye.com/v1/url?k=6948615e-08c37447-6949ea11-74fe485cbfec-fea93affd4665d88&q=1&e=501044d4-19cb-42be-bca2-b59852a39c26&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fpci%2Faxis%2Cartpec8-pcie-ep.yaml%23
>> +$schema: https://protect2.fireeye.com/v1/url?k=629fe254-0314f74d-629e691b-74fe485cbfec-f3d83f3fca174eef&q=1&e=501044d4-19cb-42be-bca2-b59852a39c26&u=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23
>> +
>> +title: ARTPEC-8 SoC PCIe Controller Device Tree Bindings
>
> s/Device Tree Bindings//
>
I will remove it.
>> +
>> +maintainers:
>> + - Jesper Nilsson <jesper.nilsson@axis.com>
>> +
>> +description: |+
>> + This PCIe end-point controller is based on the Synopsys DesignWare PCIe IP
>> + and thus inherits all the common properties defined in snps,dw-pcie-ep.yaml.
>> +
>> +allOf:
>> + - $ref: /schemas/pci/snps,dw-pcie-ep.yaml#
>> +
>> +properties:
>> + compatible:
>> + const: axis,artpec8-pcie-ep
>> +
>> + reg:
>> + items:
>> + - description: Data Bus Interface (DBI) registers.
>> + - description: Data Bus Interface (DBI2) registers.
>> + - description: PCIe address space region.
>> +
>> + reg-names:
>> + items:
>> + - const: dbi
>> + - const: dbi2
>> + - const: addr_space
>> +
>> + interrupts:
>> + maxItems: 1
>> +
>> + interrupts-names:
>> + items:
>> + - const: intr
>
> Remove the interrupts-names entirely, no need for single item with
> generic name.
>
>
I will remove it.
>> +
>> + clocks:
> + items:
>> + - description: PIPE clock, used by the controller to clock the PIPE
>> + - description: PCIe dbi clock, ungated version
>> + - description: PCIe master clock, ungated version
>> + - description: PCIe slave clock, ungated version
>> +
>> + clock-names:
>> + items:
>> + - const: pipe_clk
>> + - const: dbi_clk
>> + - const: mstr_clk
>> + - const: slv_clk
>
> Remove "_clk" suffix from all entries.
>
Ok.
>> +
>> + phys:
>> + maxItems: 1
>> +
>> + phy-names:
>> + items:
>> + - const: pcie_phy
>
> Remove the phy-names entirely, no need for single item with generic name.
>
Ok.
>> +
>> + num-lanes:
>> + const: 2
>> +
>> +required:
>
> My comment was not applied here, so please fix it.
>
>
Ok, i miss compatible..
>> + - reg
>> + - reg-names
>> + - interrupts
>> + - interrupt-names
>> + - clocks
>> + - clock-names
>> + - phys
>> + - num-lanes
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/interrupt-controller/irq.h>
>> + #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +
>> + artpec8 {
>
> Generic nodes please. Did you see "artpec8" or something like this in
> any DTS?
>
Ok, i will modify to 'soc'.
>> + #address-cells = <2>;
>> + #size-cells = <2>;
>> + pcie_ep: pcie-ep@17200000 {
>> + compatible = "axis,artpec8-pcie-ep";
>> + reg = <0x0 0x17200000 0x0 0x1000>,
>> + <0x0 0x17201000 0x0 0x1000>,
>> + <0x2 0x00000000 0x6 0x00000000>;
>> + reg-names = "dbi", "dbi2", "addr_space";
>> + #interrupt-cells = <1>;
>> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
>> + interrupt-names = "intr";
>> + clocks = <&clock_cmu_fsys 39>,
>> + <&clock_cmu_fsys 38>,
>> + <&clock_cmu_fsys 37>,
>> + <&clock_cmu_fsys 36>;
>> + clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
>> + phys = <&pcie_phy>;
>> + phy-names = "pcie_phy";
>> + num-lanes = <2>;
>> + bus-range = <0x00 0xff>;
>> + num-ib-windows = <16>;
>> + num-ob-windows = <16>;
>> + };
>> + };
>
>
>> +...
>> diff --git a/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
>> new file mode 100644
>> index 0000000..945a061
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pci/axis,artpec8-pcie.yaml
>> @@ -0,0 +1,123 @@
>> +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
>> +%YAML 1.2
>> +---
>> +$id: https://protect2.fireeye.com/v1/url?k=1de15b04-7c6a4e1d-1de0d04b-74fe485cbfec-aaaa8e4e3891e6f9&q=1&e=501044d4-19cb-42be-bca2-b59852a39c26&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fpci%2Faxis%2Cartpec8-pcie.yaml%23
>> +$schema: https://protect2.fireeye.com/v1/url?k=66c233a3-074926ba-66c3b8ec-74fe485cbfec-9eadff8200c7df97&q=1&e=501044d4-19cb-42be-bca2-b59852a39c26&u=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23
>> +
>> +title: Artpec-8 SoC PCIe Controller Device Tree Bindings
>
> Ditto
>
Ok.
>> +
>> +maintainers:
>> + - Jesper Nilsson <jesper.nilsson@axis.com>
>> +
>> +description: |+
>> + This PCIe host controller is based on the Synopsys DesignWare PCIe IP
>> + and thus inherits all the common properties defined in snps,dw-pcie.yaml.
>> +
>> +allOf:
>> + - $ref: /schemas/pci/snps,dw-pcie.yaml#
>> +
>> +properties:
>> + compatible:
>> + const: axis,artpec8-pcie
>> +
>> + reg:
>> + items:
>> + - description: Data Bus Interface (DBI) registers.
>> + - description: External Local Bus interface (ELBI) registers.
>> + - description: PCIe configuration space region.
>> +
>> + reg-names:
>> + items:
>> + - const: dbi
>> + - const: elbi
>> + - const: config
>> +
>> + device_type:
>> + items:
>
> It's not a list, but just a string. No need for items.
>
Ok.
>> + - const: pci
>> +
>> + ranges:
>> + maxItems: 2
>> +
>> + num-lanes:
>> + const: 2
>> +
>> + interrupts:
>> + maxItems: 1
>> +
>> + interrupts-names:
>> + items:
>> + - const: intr
>
> Remove entire property.
>
Ok.
>> +
>> + clocks:
>> + items:
>> + - description: PIPE clock, used by the controller to clock the PIPE
>> + - description: PCIe dbi clock, ungated version
>> + - description: PCIe master clock, ungated version
>> + - description: PCIe slave clock, ungated version
>> +
>> + clock-names:
>> + items:
>> + - const: pipe_clk
>> + - const: dbi_clk
>> + - const: mstr_clk
>> + - const: slv_clk
>
> Remove suffix.
>
Ok.
>> +
>> + phys:
>> + maxItems: 1
>> +
>> + phy-names:
>> + items:
>> + - const: pcie_phy
>
> Remove entire property.
>
Ok.
>> +
>> +required:
>
> Previous comment not applied.
>
Ok.
>> + - reg
>> + - reg-names
>> + - device_type
>> + - ranges
>> + - num-lanes
>> + - interrupts
>> + - interrupt-names
>> + - clocks
>> + - clock-names
>> + - phys
>> + - phy-names
>> +
>> +unevaluatedProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/interrupt-controller/irq.h>
>> + #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +
>> + artpec8 {
>
> Same as previous patch.
>
I will modify to 'soc'.
>> + #address-cells = <2>;
>> + #size-cells = <2>;
>> + pcie: pcie@17200000 {
>> + compatible = "axis,artpec8-pcie";
>> + reg = <0x0 0x17200000 0x0 0x1000>,
>> + <0x0 0x16ca0000 0x0 0x2000>,
>> + <0x7 0x0001e000 0x0 0x2000>;
>> + reg-names = "dbi", "elbi", "config";
>> + #address-cells = <3>;
>> + #size-cells = <2>;
>> + device_type = "pci";
>> + ranges = </* non-prefetchable memory */
>> + 0x83000000 0x0 0x0000000 0x2 0x00000000 0x5 0x00000000
>> + /* downstream I/O */
>> + 0x81000000 0x0 0x0000000 0x7 0x00000000 0x0 0x00010000>;
>> + num-lanes = <2>;
>> + bus-range = <0x00 0xff>;
>> + interrupts = <GIC_SPI 115 IRQ_TYPE_LEVEL_HIGH>;
>> + interrupt-names = "intr";
>> + #interrupt-cells = <1>;
>> + clocks = <&cmu_fsys 39>,
>> + <&cmu_fsys 38>,
>> + <&cmu_fsys 37>,
>> + <&cmu_fsys 36>;
>> + clock-names = "pipe_clk", "dbi_clk", "mstr_clk", "slv_clk";
>> + phys = <&pcie_phy>;
>> + phy-names = "pcie_phy";
>> + };
>> + };
>> +...
>
>
> Best regards,
> Krzysztof
Thank you for kindness reivew.
Best regards,
Wangseok Lee
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p5>
2022-06-03 2:23 ` [PATCH v2 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller Wangseok Lee
@ 2022-06-08 3:30 ` Wangseok Lee
1 sibling, 0 replies; 18+ messages in thread
From: Wangseok Lee @ 2022-06-08 3:30 UTC (permalink / raw)
To: Krzysztof Kozlowski, Wangseok Lee, robh+dt, krzk+dt, kishon,
vkoul, linux-kernel, jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang, Yeeun Kim
On 06/06/2022 19:16, Krzysztof Kozlowski wrote:
> On 03/06/2022 04:31, Wangseok Lee wrote:
>> Add description to support Axis, ARTPEC-8 SoC.
>> ARTPEC-8 is the SoC platform of Axis Communications
>> and PCIe phy is designed based on SAMSUNG PHY.
>
> This does not look like wrapped in Linux commit style.
> https://protect2.fireeye.com/v1/url?k=c73ae309-a6470b4e-c73b6846-74fe485fff30-d00b7249c2c0a970&q=1&e=b8b33895-af3d-42ce-80ac-4835057078e7&u=https%3A%2F%2Felixir.bootlin.com%2Flinux%2Fv5.18-rc4%2Fsource%2FDocumentation%2Fprocess%2Fsubmitting-patches.rst%23L586
>
Ok, i will fix it.
>>
>> changes since v1 :
>> -'make dt_binding_check' result improvement
>> -Add the missing property list
>> -Align the indentation of continued lines/entries
>>
>> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
>> ---
>> .../bindings/phy/axis,artpec8-pcie-phy.yaml | 70 ++++++++++++++++++++++
>> 1 file changed, 70 insertions(+)
>> create mode 100644 Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
>>
>> diff --git a/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml b/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
>> new file mode 100644
>> index 0000000..ab9766f
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/phy/axis,artpec8-pcie-phy.yaml
>> @@ -0,0 +1,70 @@
>> +# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
>> +%YAML 1.2
>> +---
>> +$id: https://protect2.fireeye.com/v1/url?k=8784225c-e6f9ca1b-8785a913-74fe485fff30-b4af51b9b3670f43&q=1&e=b8b33895-af3d-42ce-80ac-4835057078e7&u=http%3A%2F%2Fdevicetree.org%2Fschemas%2Fphy%2Faxis%2Cartpec8-pcie-phy.yaml%23
>> +$schema: https://protect2.fireeye.com/v1/url?k=f78efaf3-96f312b4-f78f71bc-74fe485fff30-583950d45c073877&q=1&e=b8b33895-af3d-42ce-80ac-4835057078e7&u=http%3A%2F%2Fdevicetree.org%2Fmeta-schemas%2Fcore.yaml%23
>> +
>> +title: ARTPEC-8 SoC PCIe PHY Device Tree Bindings
>
> Same comment as patch #1.
>
I will remove 'Device Tree Bindings'.
>> +
>> +maintainers:
>> + - Jesper Nilsson <jesper.nilsson@axis.com>
>> +
>> +properties:
>> + compatible:
>> + const: axis,artpec8-pcie-phy
>> +
>> + reg:
>> + items:
>> + - description: PHY registers.
>> + - description: PHY coding sublayer registers.
>> +
>> + reg-names:
>> + items:
>> + - const: phy
>> + - const: pcs
>> +
>> + "#phy-cells":
>> + const: 0
>> +
>> + clocks:
>> + items:
>> + - description: PCIe PHY reference clock
>> +
>> + clock-names:
>> + items:
>> + - const: ref_clk
>
> Same comment as patch #1.
>
Ok, remove _clk.
>> +
>> + num-lanes:
>> + const: 2
>> +
>> +required:
>> + - compatible
>> + - reg
>> + - reg-names
>> + - "#phy-cells"
>> + - clocks
>> + - clock-names
>> + - num-lanes
>> +
>> +additionalProperties: false
>> +
>> +examples:
>> + - |
>> + #include <dt-bindings/interrupt-controller/irq.h>
>> + #include <dt-bindings/interrupt-controller/arm-gic.h>
>> +
>> + artpec8 {
>
> Same comment as patch #1.
>
>
Ok, modity to 'soc'.
>> + #address-cells = <2>;
>> + #size-cells = <2>;
>> + pcie_phy: pcie-phy@16c80000 {
>> + compatible = "axis,artpec8-pcie-phy";
>> + reg = <0x0 0x16c80000 0x0 0x2000>,
>> + <0x0 0x16c90000 0x0 0x1000>;
>> + reg-names = "phy", "pcs";
>> + #phy-cells = <0>;
>> + clocks = <&clock_cmu_fsys 53>;
>> + clock-names = "ref_clk";
>> + num-lanes = <2>;
>> + };
>> + };
>> +...
>
>
> Best regards,
> Krzysztof
Thank you for kindness reivew.
Best regards,
Wangseok Lee
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p4>
2022-06-03 2:43 ` [PATCH v2 5/5] MAINTAINERS: Add maintainer for Axis " Wangseok Lee
@ 2022-06-08 3:31 ` Wangseok Lee
1 sibling, 0 replies; 18+ messages in thread
From: Wangseok Lee @ 2022-06-08 3:31 UTC (permalink / raw)
To: Krzysztof Kozlowski, Wangseok Lee, robh+dt, krzk+dt, kishon,
vkoul, linux-kernel, jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang, Yeeun Kim
On 06/06/2022 19:25, Krzysztof Kozlowski wrote:
> On 03/06/2022 04:34, Wangseok Lee wrote:
>> Add support Axis, ARTPEC-8 SoC.
>> ARTPEC-8 is the SoC platform of Axis Communications.
>> This is based on arm64 and support GEN4 & 2lane.
>> This PCIe controller is based on DesignWare Hardware core
>> and uses DesignWare core functions to implement the driver.
>>
>> changes since v1 :
>> improvement review comment of Krzysztof on driver code.
>> -debug messages for probe or other functions.
>> -Inconsistent coding style (different indentation in structure members).
>> -Inconsistent code (artpec8_pcie_get_subsystem_resources() gets device
>> from pdev and from pci so you have two same pointers;
>> or artpec8_pcie_get_ep_mem_resources() stores dev
>> as local variable but uses instead pdev->dev).
>> -Not using devm_platform_ioremap_resource().
>> -Printing messages in interrupt handlers.
>> -Several local/static structures or array are not const.
>>
>> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
>> ---
>> drivers/pci/controller/dwc/Kconfig | 31 ++
>> drivers/pci/controller/dwc/Makefile | 1 +
>> drivers/pci/controller/dwc/pcie-artpec8.c | 864 ++++++++++++++++++++++++++++++
>> 3 files changed, 896 insertions(+)
>> create mode 100644 drivers/pci/controller/dwc/pcie-artpec8.c
>>
>> diff --git a/drivers/pci/controller/dwc/Kconfig b/drivers/pci/controller/dwc/Kconfig
>> index 62ce3ab..4aa6da8 100644
>> --- a/drivers/pci/controller/dwc/Kconfig
>> +++ b/drivers/pci/controller/dwc/Kconfig
>> @@ -222,6 +222,37 @@ config PCIE_ARTPEC6_EP
>> Enables support for the PCIe controller in the ARTPEC-6 SoC to work in
>> endpoint mode. This uses the DesignWare core.
>>
>> +config PCIE_ARTPEC8
>> + bool "Axis ARTPEC-8 PCIe controller"
>> +
>> +config PCIE_ARTPEC8_HOST
>> + bool "Axis ARTPEC-8 PCIe controller Host Mode"
>> + depends on ARCH_ARTPEC
>
> || COMPILE_TEST
> and test it
>
Ok, I will add 'COMPILE_TEST'
And then test.
>> + depends on PCI_MSI_IRQ_DOMAIN
>> + depends on PCI_ENDPOINT
>> + select PCI_EPF_TEST
>> + select PCIE_DW_HOST
>> + select PCIE_ARTPEC8
>> + help
>> + Say 'Y' here to enable support for the PCIe controller in the
>> + ARTPEC-8 SoC to work in host mode.
>> + This PCIe controller is based on DesignWare Hardware core.
>> + And uses DesignWare core functions to implement the driver.
>> +
>> +config PCIE_ARTPEC8_EP
>> + bool "Axis ARTPEC-8 PCIe controller Endpoint Mode"
>> + depends on ARCH_ARTPEC
>
> || COMPILE_TEST
> and test it
>
>
Ok, I will add 'COMPILE_TEST'
And then test.
>> + depends on PCI_ENDPOINT
>> + depends on PCI_ENDPOINT_CONFIGFS
>> + select PCI_EPF_TEST
>> + select PCIE_DW_EP
>> + select PCIE_ARTPEC8
>> + help
>> + Say 'Y' here to enable support for the PCIe controller in the
>> + ARTPEC-8 SoC to work in endpoint mode.
>> + This PCIe controller is based on DesignWare Hardware core.
>> + And uses DesignWare core functions to implement the driver.
>> +
>> config PCIE_ROCKCHIP_DW_HOST
>> bool "Rockchip DesignWare PCIe controller"
>> select PCIE_DW
>> diff --git a/drivers/pci/controller/dwc/Makefile b/drivers/pci/controller/dwc/Makefile
>> index 8ba7b67..b361022 100644
>> --- a/drivers/pci/controller/dwc/Makefile
>> +++ b/drivers/pci/controller/dwc/Makefile
>> @@ -25,6 +25,7 @@ obj-$(CONFIG_PCIE_TEGRA194) += pcie-tegra194.o
>> obj-$(CONFIG_PCIE_UNIPHIER) += pcie-uniphier.o
>> obj-$(CONFIG_PCIE_UNIPHIER_EP) += pcie-uniphier-ep.o
>> obj-$(CONFIG_PCIE_VISCONTI_HOST) += pcie-visconti.o
>> +obj-$(CONFIG_PCIE_ARTPEC8) += pcie-artpec8.o
>
> This does not look properly ordered. Usually entries should not be added
> at the end.
>
I'll move to the 'CONFIG_PCIE_Axxx'.
>>
>> # The following drivers are for devices that use the generic ACPI
>> # pci_root.c driver but don't support standard ECAM config access.
>> diff --git a/drivers/pci/controller/dwc/pcie-artpec8.c b/drivers/pci/controller/dwc/pcie-artpec8.c
>> new file mode 100644
>> index 0000000..d9ae9bf
>> --- /dev/null
>> +++ b/drivers/pci/controller/dwc/pcie-artpec8.c
>> @@ -0,0 +1,864 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * PCIe controller driver for Axis ARTPEC-8 SoC
>> + *
>> + * Copyright (C) 2019 Samsung Electronics Co., Ltd.
>> + * http://www.samsung.com
>> + *
>> + * Author: Jaeho Cho <jaeho79.cho@samsung.com>
>> + * This file is based on driver/pci/controller/dwc/pci-exynos.c
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/module.h>
>> +#include <linux/mfd/syscon.h>
>> +#include <linux/of_device.h>
>> +#include <linux/regmap.h>
>> +#include <linux/resource.h>
>> +#include <linux/types.h>
>> +#include <linux/phy/phy.h>
>> +
>> +#include "pcie-designware.h"
>> +
>> +#define to_artpec8_pcie(x) dev_get_drvdata((x)->dev)
>> +
>> +/* Gen3 Control Register */
>> +#define PCIE_GEN3_RELATED_OFF 0x890
>> +/* Disables equilzation feature */
>> +#define PCIE_GEN3_EQUALIZATION_DISABLE (0x1 << 16)
>> +#define PCIE_GEN3_EQ_PHASE_2_3 (0x1 << 9)
>> +#define PCIE_GEN3_RXEQ_PH01_EN (0x1 << 12)
>> +#define PCIE_GEN3_RXEQ_RGRDLESS_RXTS (0x1 << 13)
>> +
>> +#define FAST_LINK_MODE (7)
>> +
>> +/* PCIe ELBI registers */
>> +#define PCIE_IRQ0_STS 0x000
>> +#define PCIE_IRQ1_STS 0x004
>> +#define PCIE_IRQ2_STS 0x008
>> +#define PCIE_IRQ5_STS 0x00C
>> +#define PCIE_IRQ0_EN 0x010
>> +#define PCIE_IRQ1_EN 0x014
>> +#define PCIE_IRQ2_EN 0x018
>> +#define PCIE_IRQ5_EN 0x01C
>> +#define IRQ_MSI_ENABLE BIT(20)
>> +#define PCIE_APP_LTSSM_ENABLE 0x054
>> +#define PCIE_ELBI_LTSSM_ENABLE 0x1
>> +#define PCIE_ELBI_CXPL_DEBUG_00_31 0x2C8
>> +#define PCIE_ELBI_CXPL_DEBUG_32_63 0x2CC
>> +#define PCIE_ELBI_SMLH_LINK_UP BIT(4)
>> +#define PCIE_ARTPEC8_DEVICE_TYPE 0x080
>> +#define DEVICE_TYPE_EP 0x0
>> +#define DEVICE_TYPE_LEG_EP 0x1
>> +#define DEVICE_TYPE_RC 0x4
>> +#define PCIE_ELBI_SLV_AWMISC 0x828
>> +#define PCIE_ELBI_SLV_ARMISC 0x820
>> +#define PCIE_ELBI_SLV_DBI_ENABLE BIT(21)
>> +#define LTSSM_STATE_MASK 0x3f
>> +#define LTSSM_STATE_L0 0x11
>> +
>> +/* FSYS SYSREG Offsets */
>> +#define FSYS_PCIE_CON 0x424
>> +#define PCIE_PERSTN BIT(5)
>> +#define FSYS_PCIE_DBI_ADDR_CON 0x428
>> +#define FSYS_PCIE_DBI_ADDR_OVR_CDM 0x00
>> +#define FSYS_PCIE_DBI_ADDR_OVR_SHADOW 0x12
>> +#define FSYS_PCIE_DBI_ADDR_OVR_ATU 0x36
>> +
>> +/* PMU SYSCON Offsets */
>> +#define PMU_SYSCON_PCIE_ISOLATION 0x3200
>> +
>> +/* BUS P/S SYSCON Offsets */
>> +#define BUS_SYSCON_BUS_PATH_ENABLE 0x0
>> +
>> +int artpec8_pcie_dbi_addr_con[] = {
>
> 1. I think I pointed before the need to constify everything which is const.
> 2. Missing static
> 3. definitions of static variables go after type declarations.
>
Ok, i will modify to static const type.
>> + FSYS_PCIE_DBI_ADDR_CON
>> +};
>> +
>> +struct artpec8_pcie {
>> + struct dw_pcie *pci;
>> + struct clk *pipe_clk;
>> + struct clk *dbi_clk;
>> + struct clk *mstr_clk;
>> + struct clk *slv_clk;
>
> Not really... Just use clk_bulk_api.
>
Ok, i will modify to use clk_bilk_api.
>> + const struct artpec8_pcie_pdata *pdata;
>> + void __iomem *elbi_base;
>> + struct regmap *sysreg;
>> + struct regmap *pmu_syscon;
>> + struct regmap *bus_s_syscon;
>> + struct regmap *bus_p_syscon;
>> + enum dw_pcie_device_mode mode;
>> + int link_id;
>> + /* For Generic PHY Framework */
>
> Skip comment, it's obvious.
>
Ok.
>> + struct phy *phy;
> +};
>> +
>
>> + /* fsys sysreg regmap handle */
>> + artpec8_ctrl->sysreg =
>> + syscon_regmap_lookup_by_phandle(dev->of_node,
>> + "samsung,fsys-sysreg");
>
> NAK.
>
> Usage of undocumented properties. Every property must be documented.
>
> Since you do not want to merge it with existing drivers (and more people
> insist on that: https://lore.kernel.org/all/Ym+u9yYrV9mxkyWX@matsya/ ),
> I am actually considering to NAK entire set if you do not post a user of
> this - DTS. Mainly because we cannot verify how does that user look like
> and such changes are sneaked in.
>
Ok, sure .
I will should be documented the all property include subsystem resource.
> Best regards,
> Krzysztof
Thank you for kindness reivew.
Best regards,
Wangseok Lee
^ permalink raw reply [flat|nested] 18+ messages in thread
* Re: [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver
[not found] <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p6>
2022-06-03 1:54 ` [PATCH v2 0/5] Add support for Axis, ARTPEC-8 PCIe driver Wangseok Lee
2022-06-03 2:31 ` [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy Wangseok Lee
@ 2022-06-08 4:14 ` Wangseok Lee
2 siblings, 0 replies; 18+ messages in thread
From: Wangseok Lee @ 2022-06-08 4:14 UTC (permalink / raw)
To: Krzysztof Kozlowski, Wangseok Lee, robh+dt, krzk+dt, kishon,
vkoul, linux-kernel, jesper.nilsson, lars.persson
Cc: bhelgaas, linux-phy, linux-pci, devicetree, lorenzo.pieralisi,
kw, linux-arm-kernel, kernel, Moon-Ki Jun, Sang Min Kim,
Dongjin Yang, Yeeun Kim
On 06/06/2022 19:34, Krzysztof Kozlowski wrote:
> On 03/06/2022 04:38, Wangseok Lee wrote:
>> Add support Axis, ARTPEC-8 SoC.
>> ARTPEC-8 is the SoC platform of Axis Communications.
>> This is based on arm64 and support GEN4 & 2lane.
>> This driver provides PHY interface for ARTPEC-8 SoC PCIe controller,
>> based on Samsung PCIe PHY IP.
>>
>> Main changes since v1 [1]:
>> -change folder name of phy driver to axis from artpec
>>
>> Signed-off-by: Wangseok Lee <wangseok.lee@samsung.com>
>> ---
>> drivers/phy/Kconfig | 1 +
>> drivers/phy/Makefile | 1 +
>> drivers/phy/axis/Kconfig | 9 +
>> drivers/phy/axis/Makefile | 2 +
>> drivers/phy/axis/phy-artpec8-pcie.c | 806 ++++++++++++++++++++++++++++++++++++
>> 5 files changed, 819 insertions(+)
>> create mode 100644 drivers/phy/axis/Kconfig
>> create mode 100644 drivers/phy/axis/Makefile
>> create mode 100644 drivers/phy/axis/phy-artpec8-pcie.c
>>
>> diff --git a/drivers/phy/Kconfig b/drivers/phy/Kconfig
>> index 300b0f2..92b8232 100644
>> --- a/drivers/phy/Kconfig
>> +++ b/drivers/phy/Kconfig
>> @@ -73,6 +73,7 @@ config PHY_CAN_TRANSCEIVER
>>
>> source "drivers/phy/allwinner/Kconfig"
>> source "drivers/phy/amlogic/Kconfig"
>> +source "drivers/phy/axis/Kconfig"
>> source "drivers/phy/broadcom/Kconfig"
>> source "drivers/phy/cadence/Kconfig"
>> source "drivers/phy/freescale/Kconfig"
>> diff --git a/drivers/phy/Makefile b/drivers/phy/Makefile
>> index 01e9eff..808c055e 100644
>> --- a/drivers/phy/Makefile
>> +++ b/drivers/phy/Makefile
>> @@ -12,6 +12,7 @@ obj-$(CONFIG_PHY_PISTACHIO_USB) += phy-pistachio-usb.o
>> obj-$(CONFIG_USB_LGM_PHY) += phy-lgm-usb.o
>> obj-y += allwinner/ \
>> amlogic/ \
>> + axis/ \
>> broadcom/ \
>> cadence/ \
>> freescale/ \
>> diff --git a/drivers/phy/axis/Kconfig b/drivers/phy/axis/Kconfig
>> new file mode 100644
>> index 0000000..7198b93
>> --- /dev/null
>> +++ b/drivers/phy/axis/Kconfig
>> @@ -0,0 +1,9 @@
>> +config PHY_ARTPEC8_PCIE
>> + bool "ARTPEC-8 PCIe PHY driver"
>> + depends on OF && (ARCH_ARTPEC8 || COMPILE_TEST)
>> + select GENERIC_PHY
>> + help
>> + Enable PCIe PHY support for ARTPEC-8 SoC.
>> + This driver provides PHY interface for ARTPEC-8 SoC
>> + PCIe controller.
>> + This is based on Samsung PCIe PHY IP.
>> diff --git a/drivers/phy/axis/Makefile b/drivers/phy/axis/Makefile
>> new file mode 100644
>> index 0000000..45d853c
>> --- /dev/null
>> +++ b/drivers/phy/axis/Makefile
>> @@ -0,0 +1,2 @@
>> +# SPDX-License-Identifier: GPL-2.0
>> +obj-$(CONFIG_PHY_ARTPEC8_PCIE) += phy-artpec8-pcie.o
>> diff --git a/drivers/phy/axis/phy-artpec8-pcie.c b/drivers/phy/axis/phy-artpec8-pcie.c
>> new file mode 100644
>> index 0000000..2742301
>> --- /dev/null
>> +++ b/drivers/phy/axis/phy-artpec8-pcie.c
>> @@ -0,0 +1,806 @@
>> +// SPDX-License-Identifier: GPL-2.0-only
>> +/*
>> + * PHY provider for ARTPEC-8 PCIe controller
>> + *
>> + * Copyright (C) 2019 Samsung Electronics Co., Ltd.
>> + * http://www.samsung.com
>> + *
>> + * Author: Jaeho Cho <jaeho79.cho@samsung.com>
>> + */
>> +
>> +#include <linux/clk.h>
>> +#include <linux/io.h>
>> +#include <linux/init.h>
>> +#include <linux/mfd/syscon.h>
>> +#include <linux/module.h>
>> +#include <linux/of.h>
>> +#include <linux/of_address.h>
>> +#include <linux/of_platform.h>
>> +#include <linux/platform_device.h>
>> +#include <linux/phy/phy.h>
>> +#include <linux/regmap.h>
>> +#include <linux/debugfs.h>
>> +
>> +/* ARTPEC-8 PCIe PHY registers */
>> +/* CMN registers */
>> +#define PCIE_PHY_CMN_REG004 0x10
>> +#define PCIE_PHY_CMN_REG00B 0x2C
>> +#define PCIE_PHY_CMN_REG016 0x58
>> +#define PCIE_PHY_CMN_REG01C 0x70
>> +#define PCIE_PHY_CMN_REG021 0x84
>> +#define PCIE_PHY_CMN_REG024 0x90
>> +#define PCIE_PHY_CMN_REG025 0x94
>> +#define PCIE_PHY_CMN_REG0E6 0x398
>> +#define PCIE_PHY_CMN_REG0E7 0x39C
>> +#define PCIE_PHY_CMN_REG0E8 0x3A0
>> +#define PCIE_PHY_CMN_REG0E9 0x3A4
>> +#define PCIE_PHY_CMN_REG0EA 0x3A8
>> +#define PCIE_PHY_CMN_REG0EB 0x3AC
>> +#define PCIE_PHY_CMN_REG0EC 0x3B0
>> +#define PCIE_PHY_CMN_REG0EE 0x3B8
>> +#define PCIE_PHY_CMN_REG0EF 0x3BC
>> +#define PCIE_PHY_CMN_REG0F1 0x3C4
>> +#define PCIE_PHY_CMN_REG0F3 0x3CC
>> +#define PCIE_PHY_CMN_REG0F4 0x3D0
>> +
>> +#define PCIE_PHY_CMN_REG101 0x404
>> +#define OV_I_CMN_RSTN BIT(4)
>> +#define OV_I_INIT_RSTN BIT(6)
>> +
>> +#define PCIE_PHY_CMN_REG131 0x4C4
>> +#define PCIE_PHY_CMN_REG17B 0x5EC
>> +#define PCIE_PHY_CMN_REG17D 0x5F4
>> +#define PCIE_PHY_CMN_REG190 0x640
>> +#define PCIE_PHY_CMN_REG191 0x644
>> +#define PCIE_PHY_CMN_REG192 0x648
>> +#define PCIE_PHY_CMN_REG1C7 0x71C
>> +#define PCIE_PHY_CMN_REG1DF 0x77C
>> +#define PCIE_PHY_CMN_REG1E0 0x780
>> +
>> +#define PCIE_PHY_CMN_REG0B1 0x2C4
>> +#define ANA_ROPLL_REF_DIG_CLK_SEL BIT(2)
>> +
>> +/* External clock */
>> +#define PCIE_PHY_CMN_REG14D 0x534
>> +#define PCIE_AUX_RX_MODE_EXTEND BIT(7)
>> +
>> +#define PCIE_PHY_CMN_REG0D9 0x364
>> +#define ANA_AUX_EXT_REF_CLK_SEL BIT(4)
>> +
>> +#define PCIE_PHY_CMN_REG10F 0x43C
>> +#define AUX_PLL_EN_EXTEND BIT(4)
>> +
>> +#define PCIE_PHY_CMN_REG11E 0x478
>> +#define AUX2_PLL_EN_EXTEND BIT(3)
>> +
>> +#define PCIE_PHY_CMN_REG0D4 0x350
>> +#define OV_S_ANA_AUX_EN BIT(3)
>> +#define OV_I_ANA_AUX_EN BIT(2)
>> +
>> +/* LANE registers */
>> +#define PCIE_PHY_TRSV_REG22D 0x8B4
>> +#define PCIE_PHY_TRSV_REG23E 0x8F8
>> +#define PCIE_PHY_TRSV_REG2A5 0xA94
>> +#define PCIE_PHY_TRSV_REG3E3 0xF8C
>> +#define PCIE_PHY_TRSV_REG3ED 0xFB4
>> +#define PCIE_PHY_TRSV_REG20B 0x82C
>> +#define PCIE_PHY_TRSV_REG20C 0x830
>> +#define PCIE_PHY_TRSV_REG234 0x8D0
>> +#define PCIE_PHY_TRSV_REG235 0x8D4
>> +#define PCIE_PHY_TRSV_REG237 0x8DC
>> +#define PCIE_PHY_TRSV_REG239 0x8E4
>> +#define PCIE_PHY_TRSV_REG23A 0x8E8
>> +#define PCIE_PHY_TRSV_REG23B 0x8EC
>> +#define PCIE_PHY_TRSV_REG24B 0x92C
>> +#define PCIE_PHY_TRSV_REG25D 0x974
>> +#define PCIE_PHY_TRSV_REG262 0x988
>> +#define PCIE_PHY_TRSV_REG271 0x9C4
>> +#define PCIE_PHY_TRSV_REG272 0x9C8
>> +#define PCIE_PHY_TRSV_REG27C 0x9F0
>> +#define PCIE_PHY_TRSV_REG27D 0x9F4
>> +#define PCIE_PHY_TRSV_REG27E 0x9F8
>> +#define PCIE_PHY_TRSV_REG284 0xA10
>> +#define PCIE_PHY_TRSV_REG289 0xA24
>> +#define PCIE_PHY_TRSV_REG28A 0xA28
>> +#define PCIE_PHY_TRSV_REG28B 0xA2C
>> +#define PCIE_PHY_TRSV_REG28C 0xA30
>> +#define PCIE_PHY_TRSV_REG28E 0xA38
>> +#define PCIE_PHY_TRSV_REG28F 0xA3C
>> +#define PCIE_PHY_TRSV_REG290 0xA40
>> +#define PCIE_PHY_TRSV_REG291 0xA44
>> +#define PCIE_PHY_TRSV_REG292 0xA48
>> +#define PCIE_PHY_TRSV_REG294 0xA50
>> +#define PCIE_PHY_TRSV_REG295 0xA54
>> +#define PCIE_PHY_TRSV_REG296 0xA58
>> +#define PCIE_PHY_TRSV_REG297 0xA5C
>> +#define PCIE_PHY_TRSV_REG298 0xA60
>> +#define PCIE_PHY_TRSV_REG29B 0xA6C
>> +#define PCIE_PHY_TRSV_REG29C 0xA70
>> +#define PCIE_PHY_TRSV_REG29D 0xA74
>> +#define PCIE_PHY_TRSV_REG29E 0xA78
>> +#define PCIE_PHY_TRSV_REG2AA 0xAA8
>> +#define PCIE_PHY_TRSV_REG2AE 0xAB8
>> +#define PCIE_PHY_TRSV_REG2C2 0xB08
>> +#define PCIE_PHY_TRSV_REG2C6 0xB18
>> +#define PCIE_PHY_TRSV_REG2C7 0xB1C
>> +#define PCIE_PHY_TRSV_REG2CB 0xB2C
>> +#define PCIE_PHY_TRSV_REG2CC 0xB30
>> +#define PCIE_PHY_TRSV_REG2CD 0xB34
>> +#define PCIE_PHY_TRSV_REG2CE 0xB38
>> +#define PCIE_PHY_TRSV_REG2D0 0xB40
>> +#define PCIE_PHY_TRSV_REG2CF 0xB3C
>> +#define PCIE_PHY_TRSV_REG2E0 0xB80
>> +#define PCIE_PHY_TRSV_REG2E9 0xBA4
>> +#define PCIE_PHY_TRSV_REG2EA 0xBA8
>> +#define PCIE_PHY_TRSV_REG2EB 0xBAC
>> +#define PCIE_PHY_TRSV_REG315 0xC54
>> +#define PCIE_PHY_TRSV_REG317 0xC5C
>> +#define PCIE_PHY_TRSV_REG319 0xC64
>> +#define PCIE_PHY_TRSV_REG364 0xD90
>> +#define PCIE_PHY_TRSV_REG36C 0xDB0
>> +#define PCIE_PHY_TRSV_REG36D 0xDB4
>> +#define PCIE_PHY_TRSV_REG37E 0xDF8
>> +#define PCIE_PHY_TRSV_REG37F 0xDFC
>> +#define PCIE_PHY_TRSV_REG38F 0xE3C
>> +#define PCIE_PHY_TRSV_REG391 0xE44
>> +#define PCIE_PHY_TRSV_REG39C 0xE70
>> +#define PCIE_PHY_TRSV_REG3A8 0xEA0
>> +#define PCIE_PHY_TRSV_REG3E0 0xF80
>> +#define PCIE_PHY_TRSV_REG3E1 0xF84
>> +#define PCIE_PHY_TRSV_REG3E7 0xF9C
>> +#define PCIE_PHY_TRSV_REG3E9 0xFA4
>> +#define PCIE_PHY_TRSV_REG3EA 0xFA8
>> +#define PCIE_PHY_TRSV_REG3EE 0xFB8
>> +#define PCIE_PHY_TRSV_REG3EF 0xFBC
>> +#define PCIE_PHY_TRSV_REG3F0 0xFC0
>> +
>> +#define PCIE_PHY_TRSV_REG2C0 0xB00
>> +#define LN_EQ_CTRL_RX_DATA_HOLD BIT(5)
>> +
>> +/* RX Preset registers */
>> +#define PCIE_PHY_CMN_REG17E 0x5F8
>> +#define PCIE_PHY_CMN_REG180 0x600
>> +#define PCIE_PHY_CMN_REG181 0x604
>> +#define PCIE_PHY_CMN_REG182 0x608
>> +#define PCIE_PHY_CMN_REG183 0x60C
>> +#define PCIE_PHY_CMN_REG184 0x610
>> +#define PCIE_PHY_CMN_REG185 0x614
>> +#define PCIE_PHY_CMN_REG186 0x618
>> +#define PCIE_PHY_CMN_REG187 0x61C
>> +
>> +
>> +/* ARTPEC-8 PCIe PCS registers */
>> +#define PCIE_PCS_OUT_VEC_4 0x154
>> +#define B1_DYNAMIC BIT(3)
>> +
>> +/* ARTPEC-8 SYS REG registers */
>> +#define FSYS_PCIE_CON 0x424
>> +#define PCIE_PHY_LCPLL_REFCLK_SEL 0x3
>> +#define PCIE_PHY_ROPLL_REFCLK_SEL (0x3UL << 2)
>> +#define ROPLL_REFCLK_NOT_AVAILABLE (0x2UL << 2)
>> +#define PCIE_PHY_LN0_REFCLK_PAD_EN BIT(10)
>> +#define PCIE_PHY_LN1_REFCLK_PAD_EN BIT(11)
>> +#define PCIE_PHY_PWR_OFF BIT(7)
>> +
>> +/* ARTPEC-8 Sub Controller registers */
>> +#define SFR_INIT_RSTN 0x1404
>> +#define SFR_CMN_RSTN 0x1408
>> +
>> +#define PCIE_PHY_LN0_REG_START 0x800
>> +#define PCIE_PHY_LN0_REG_END 0xFCC
>> +#define OFFSET_PER_LANE 0x800
>> +
>> +enum artpec8_pcie_phy_num_lanes {
>> + LANE0 = 0,
>> + LANE1,
>> + LANE_MAX
>> +};
>> +
>> +struct artpec8_pcie_phy_data {
>> + const struct phy_ops *ops;
>
> No need for indentation before "*ops". Other places do not use it.
>
Ok. remove unnecessary indentation.
>> +};
>> +
> +struct artpec8_pcie_phy {
>> + const struct artpec8_pcie_phy_data *drv_data;
>> + void __iomem *phy_base;
>> + void __iomem *pcs_base;
>> + void __iomem *elbi_base;
>> + struct clk *soc_pll_clk;
>> + struct regmap *sysreg;
>> + u32 lcpll_ref_clk;
>> + const char *mode;
>> + u32 num_lanes;
>> +};
>> +
>> +enum artpec8_pcie_ref_clk {
>> + REF_CLK_FROM_XO = 0,
>> + REF_CLK_FROM_IO,
>> + REF_CLK_RESERVED,
>> + REF_CLK_FROM_SOC_PLL,
>> + REF_CLK_MAX
>> +};
>> +
>> +struct artpec8_pcie_phy_tune_reg {
>> + u32 offset;
>> + u32 val;
>> +};
>> +
>> +/* ARTPEC-8 PCIe Gen4 x2 PHY CMN register settings */
>> +struct artpec8_pcie_phy_tune_reg cmn_regs[] = {
>
> static const
>
Ok.
>> + {PCIE_PHY_CMN_REG004, 0x65},
>> + {PCIE_PHY_CMN_REG00B, 0x18},
>> + {PCIE_PHY_CMN_REG016, 0x0E},
>> + {PCIE_PHY_CMN_REG01C, 0x4F},
>> + {PCIE_PHY_CMN_REG021, 0x01},
>> + {PCIE_PHY_CMN_REG024, 0x58},
>> + {PCIE_PHY_CMN_REG025, 0x98},
>> + {PCIE_PHY_CMN_REG0E6, 0x00},
>> + {PCIE_PHY_CMN_REG0E7, 0x00},
>> + {PCIE_PHY_CMN_REG0E8, 0x3F},
>> + {PCIE_PHY_CMN_REG0E9, 0x3F},
>> + {PCIE_PHY_CMN_REG0EA, 0xFF},
>> + {PCIE_PHY_CMN_REG0EB, 0xFF},
>> + {PCIE_PHY_CMN_REG0EC, 0x42},
>> + {PCIE_PHY_CMN_REG0EE, 0x3F},
>> + {PCIE_PHY_CMN_REG0EF, 0x7F},
>> + {PCIE_PHY_CMN_REG0F1, 0x02},
>> + {PCIE_PHY_CMN_REG0F3, 0xFF},
>> + {PCIE_PHY_CMN_REG0F4, 0xFF},
>> + {PCIE_PHY_CMN_REG131, 0x01},
>> + {PCIE_PHY_CMN_REG17B, 0xC0},
>> + {PCIE_PHY_CMN_REG17D, 0xAF},
>> + {PCIE_PHY_CMN_REG190, 0x27},
>> + {PCIE_PHY_CMN_REG191, 0x0F},
>> + {PCIE_PHY_CMN_REG192, 0x3F},
>> + {PCIE_PHY_CMN_REG1C7, 0x05},
>> + {PCIE_PHY_CMN_REG1DF, 0x28},
>> + {PCIE_PHY_CMN_REG1E0, 0x28},
>> +};
>> +
>> +/* ARTPEC-8 PCIe Gen4 x2 PHY lane register settings */
>> +struct artpec8_pcie_phy_tune_reg lane_regs[] = {
>
> Same.
>
Ok.
>> + {PCIE_PHY_TRSV_REG22D, 0x00},
>> + {PCIE_PHY_TRSV_REG23E, 0x00},
>> + {PCIE_PHY_TRSV_REG2A5, 0x73},
>> + {PCIE_PHY_TRSV_REG3E3, 0x7B},
>> + {PCIE_PHY_TRSV_REG3ED, 0x4B},
>> + {PCIE_PHY_TRSV_REG20B, 0x02},
>> + {PCIE_PHY_TRSV_REG20C, 0xEA},
>> + {PCIE_PHY_TRSV_REG234, 0x7A},
>> + {PCIE_PHY_TRSV_REG235, 0x1C},
>> + {PCIE_PHY_TRSV_REG237, 0x10},
>> + {PCIE_PHY_TRSV_REG239, 0x68},
>> + {PCIE_PHY_TRSV_REG23A, 0xC0},
>> + {PCIE_PHY_TRSV_REG23B, 0x0B},
>> + {PCIE_PHY_TRSV_REG24B, 0x00},
>> + {PCIE_PHY_TRSV_REG25D, 0x07},
>> + {PCIE_PHY_TRSV_REG262, 0x07},
>> + {PCIE_PHY_TRSV_REG271, 0x23},
>> + {PCIE_PHY_TRSV_REG272, 0x5E},
>> + {PCIE_PHY_TRSV_REG27C, 0x8C},
>> + {PCIE_PHY_TRSV_REG27D, 0x5B},
>> + {PCIE_PHY_TRSV_REG27E, 0x2C},
>> + {PCIE_PHY_TRSV_REG284, 0x33},
>> + {PCIE_PHY_TRSV_REG289, 0xD4},
>> + {PCIE_PHY_TRSV_REG28A, 0xCC},
>> + {PCIE_PHY_TRSV_REG28B, 0xD9},
>> + {PCIE_PHY_TRSV_REG28C, 0xDC},
>> + {PCIE_PHY_TRSV_REG28E, 0xC6},
>> + {PCIE_PHY_TRSV_REG28F, 0x90},
>> + {PCIE_PHY_TRSV_REG290, 0x4D},
>> + {PCIE_PHY_TRSV_REG291, 0x19},
>> + {PCIE_PHY_TRSV_REG292, 0x1C},
>> + {PCIE_PHY_TRSV_REG294, 0x05},
>> + {PCIE_PHY_TRSV_REG295, 0x10},
>> + {PCIE_PHY_TRSV_REG296, 0x0C},
>> + {PCIE_PHY_TRSV_REG297, 0x19},
>> + {PCIE_PHY_TRSV_REG298, 0x04},
>> + {PCIE_PHY_TRSV_REG29B, 0x03},
>> + {PCIE_PHY_TRSV_REG29C, 0x1B},
>> + {PCIE_PHY_TRSV_REG29D, 0x1B},
>> + {PCIE_PHY_TRSV_REG29E, 0x1F},
>> + {PCIE_PHY_TRSV_REG2AA, 0x00},
>> + {PCIE_PHY_TRSV_REG2AE, 0x1F},
>> + {PCIE_PHY_TRSV_REG2C2, 0x25},
>> + {PCIE_PHY_TRSV_REG2C6, 0x10},
>> + {PCIE_PHY_TRSV_REG2C7, 0x06},
>> + {PCIE_PHY_TRSV_REG2CB, 0x10},
>> + {PCIE_PHY_TRSV_REG2CC, 0x06},
>> + {PCIE_PHY_TRSV_REG2CD, 0x20},
>> + {PCIE_PHY_TRSV_REG2CE, 0x27},
>> + {PCIE_PHY_TRSV_REG2D0, 0x10},
>> + {PCIE_PHY_TRSV_REG2CF, 0x0A},
>> + {PCIE_PHY_TRSV_REG2E0, 0x01},
>> + {PCIE_PHY_TRSV_REG2E9, 0x11},
>> + {PCIE_PHY_TRSV_REG2EA, 0x05},
>> + {PCIE_PHY_TRSV_REG2EB, 0x4C},
>> + {PCIE_PHY_TRSV_REG315, 0x18},
>> + {PCIE_PHY_TRSV_REG317, 0x86},
>> + {PCIE_PHY_TRSV_REG319, 0x8E},
>> + {PCIE_PHY_TRSV_REG364, 0x00},
>> + {PCIE_PHY_TRSV_REG36C, 0x03},
>> + {PCIE_PHY_TRSV_REG36D, 0x04},
>> + {PCIE_PHY_TRSV_REG37E, 0x06},
>> + {PCIE_PHY_TRSV_REG37F, 0x04},
>> + {PCIE_PHY_TRSV_REG38F, 0x40},
>> + {PCIE_PHY_TRSV_REG391, 0x8B},
>> + {PCIE_PHY_TRSV_REG39C, 0xFF},
>> + {PCIE_PHY_TRSV_REG3A8, 0x02},
>> + {PCIE_PHY_TRSV_REG3E0, 0x93},
>> + {PCIE_PHY_TRSV_REG3E1, 0x79},
>> + {PCIE_PHY_TRSV_REG3E7, 0xF5},
>> + {PCIE_PHY_TRSV_REG3E9, 0x75},
>> + {PCIE_PHY_TRSV_REG3EA, 0x0D},
>> + {PCIE_PHY_TRSV_REG3EE, 0xE2},
>> + {PCIE_PHY_TRSV_REG3EF, 0x6F},
>> + {PCIE_PHY_TRSV_REG3F0, 0x3D}
>> +};
>> +#define PCIE_PHY_CMN_REG17E 0x5F8
>> +#define PCIE_PHY_CMN_REG180 0x600
>> +#define PCIE_PHY_CMN_REG181 0x604
>> +#define PCIE_PHY_CMN_REG182 0x608
>> +#define PCIE_PHY_CMN_REG183 0x60C
>> +#define PCIE_PHY_CMN_REG184 0x610
>> +#define PCIE_PHY_CMN_REG185 0x614
>> +#define PCIE_PHY_CMN_REG186 0x618
>> +#define PCIE_PHY_CMN_REG187 0x61C
>
> Defines go to the top, before any type declarations.
>
Ok.
>> +
>> +struct artpec8_pcie_phy_tune_reg rx_preset_regs[] = {
>
> Same.
>
Ok, static const.
>> + /* 0 */
>> + {PCIE_PHY_CMN_REG17E, 0x00},
>> + {PCIE_PHY_CMN_REG180, 0x23},
>> + {PCIE_PHY_CMN_REG181, 0x44},
>> + {PCIE_PHY_CMN_REG182, 0x61},
>> + {PCIE_PHY_CMN_REG183, 0x55},
>> + {PCIE_PHY_CMN_REG184, 0x14},
>> + {PCIE_PHY_CMN_REG185, 0x23},
>> + {PCIE_PHY_CMN_REG186, 0x1A},
>> + {PCIE_PHY_CMN_REG187, 0x04},
>> + {PCIE_PHY_CMN_REG17E, 0x04},
>> + {PCIE_PHY_CMN_REG17E, 0x00},
>> + /* 1 */
>> + {PCIE_PHY_CMN_REG17E, 0x08},
>> + {PCIE_PHY_CMN_REG181, 0x42},
>> + {PCIE_PHY_CMN_REG17E, 0x0C},
>> + {PCIE_PHY_CMN_REG17E, 0x08},
>> + /* 2 */
>> + {PCIE_PHY_CMN_REG17E, 0x10},
>> + {PCIE_PHY_CMN_REG181, 0x40},
>> + {PCIE_PHY_CMN_REG17E, 0x14},
>> + {PCIE_PHY_CMN_REG17E, 0x10},
>> + /* 3 */
>> + {PCIE_PHY_CMN_REG17E, 0x18},
>> + {PCIE_PHY_CMN_REG181, 0x45},
>> + {PCIE_PHY_CMN_REG17E, 0x1C},
>> + {PCIE_PHY_CMN_REG17E, 0x18},
>> + /* 4 */
>> + {PCIE_PHY_CMN_REG17E, 0x20},
>> + {PCIE_PHY_CMN_REG181, 0x46},
>> + {PCIE_PHY_CMN_REG17E, 0x24},
>> + {PCIE_PHY_CMN_REG17E, 0x20},
>> + /* 5 */
>> + {PCIE_PHY_CMN_REG17E, 0x28},
>> + {PCIE_PHY_CMN_REG181, 0x48},
>> + {PCIE_PHY_CMN_REG17E, 0x2C},
>> + {PCIE_PHY_CMN_REG17E, 0x28},
>> + /* 6 */
>> + {PCIE_PHY_CMN_REG17E, 0x30},
>> + {PCIE_PHY_CMN_REG181, 0x4A},
>> + {PCIE_PHY_CMN_REG17E, 0x34},
>> + {PCIE_PHY_CMN_REG17E, 0x30},
>> + /* 7 */
>> + {PCIE_PHY_CMN_REG17E, 0x38},
>> + {PCIE_PHY_CMN_REG181, 0x4C},
>> + {PCIE_PHY_CMN_REG17E, 0x3C},
>> + {PCIE_PHY_CMN_REG17E, 0x38},
>> + /* 8 */
>> + {PCIE_PHY_CMN_REG17E, 0x40},
>> + {PCIE_PHY_CMN_REG180, 0x20},
>> + {PCIE_PHY_CMN_REG181, 0x20},
>> + {PCIE_PHY_CMN_REG182, 0x01},
>> + {PCIE_PHY_CMN_REG17E, 0x44},
>> + {PCIE_PHY_CMN_REG17E, 0x40},
>> + /* 9 */
>> + {PCIE_PHY_CMN_REG17E, 0x48},
>> + {PCIE_PHY_CMN_REG180, 0x20},
>> + {PCIE_PHY_CMN_REG181, 0x21},
>> + {PCIE_PHY_CMN_REG182, 0x01},
>> + {PCIE_PHY_CMN_REG17E, 0x4C},
>> + {PCIE_PHY_CMN_REG17E, 0x48},
>> + /* 10 */
>> + {PCIE_PHY_CMN_REG17E, 0x50},
>> + {PCIE_PHY_CMN_REG180, 0x24},
>> + {PCIE_PHY_CMN_REG181, 0x80},
>> + {PCIE_PHY_CMN_REG182, 0x41},
>> + {PCIE_PHY_CMN_REG183, 0xAF},
>> + {PCIE_PHY_CMN_REG184, 0x26},
>> + {PCIE_PHY_CMN_REG185, 0x34},
>> + {PCIE_PHY_CMN_REG186, 0x24},
>> + {PCIE_PHY_CMN_REG187, 0x06},
>> + {PCIE_PHY_CMN_REG17E, 0x54},
>> + {PCIE_PHY_CMN_REG17E, 0x50},
>> + /* 11 */
>> + {PCIE_PHY_CMN_REG17E, 0x58},
>> + {PCIE_PHY_CMN_REG181, 0x81},
>> + {PCIE_PHY_CMN_REG17E, 0x5C},
>> + {PCIE_PHY_CMN_REG17E, 0x58},
>> + /* 12 */
>> + {PCIE_PHY_CMN_REG17E, 0x60},
>> + {PCIE_PHY_CMN_REG181, 0x82},
>> + {PCIE_PHY_CMN_REG17E, 0x64},
>> + {PCIE_PHY_CMN_REG17E, 0x60},
>> + /* 13 */
>> + {PCIE_PHY_CMN_REG17E, 0x68},
>> + {PCIE_PHY_CMN_REG181, 0x83},
>> + {PCIE_PHY_CMN_REG17E, 0x6C},
>> + {PCIE_PHY_CMN_REG17E, 0x68},
>> + /* 14 */
>> + {PCIE_PHY_CMN_REG17E, 0x70},
>> + {PCIE_PHY_CMN_REG181, 0x84},
>> + {PCIE_PHY_CMN_REG17E, 0x74},
>> + {PCIE_PHY_CMN_REG17E, 0x70},
>> + /* 15 */
>> + {PCIE_PHY_CMN_REG17E, 0x78},
>> + {PCIE_PHY_CMN_REG180, 0x24},
>> + {PCIE_PHY_CMN_REG181, 0x85},
>> + {PCIE_PHY_CMN_REG182, 0x80},
>> + {PCIE_PHY_CMN_REG183, 0x7F},
>> + {PCIE_PHY_CMN_REG184, 0x2D},
>> + {PCIE_PHY_CMN_REG185, 0x34},
>> + {PCIE_PHY_CMN_REG186, 0x24},
>> + {PCIE_PHY_CMN_REG187, 0x05},
>> + {PCIE_PHY_CMN_REG17E, 0x7C},
>> + {PCIE_PHY_CMN_REG17E, 0x78},
>> + /* 16 */
>> + {PCIE_PHY_CMN_REG17E, 0x80},
>> + {PCIE_PHY_CMN_REG181, 0x86},
>> + {PCIE_PHY_CMN_REG17E, 0x84},
>> + {PCIE_PHY_CMN_REG17E, 0x80},
>> + /* 17 */
>> + {PCIE_PHY_CMN_REG17E, 0x88},
>> + {PCIE_PHY_CMN_REG181, 0x87},
>> + {PCIE_PHY_CMN_REG17E, 0x8C},
>> + {PCIE_PHY_CMN_REG17E, 0x88},
>> + /* 18 */
>> + {PCIE_PHY_CMN_REG17E, 0x90},
>> + {PCIE_PHY_CMN_REG181, 0x88},
>> + {PCIE_PHY_CMN_REG17E, 0x94},
>> + {PCIE_PHY_CMN_REG17E, 0x90},
>> + /* 19 */
>> + {PCIE_PHY_CMN_REG17E, 0x98},
>> + {PCIE_PHY_CMN_REG181, 0x89},
>> + {PCIE_PHY_CMN_REG17E, 0x9C},
>> + {PCIE_PHY_CMN_REG17E, 0x98},
>> +};
>> +
>> +
>> +static void artpec8_pcie_phy_reg_writel(void __iomem *base, u32 val, u32 reg)
>> +{
>> + writel(val, base + reg);
>
> No, do not create wrappers on writel. Remove entire function.
>
Ok, i will remove wrappers function and direct call writel.
>> +};
>> +
>> +static u32 artpec8_pcie_phy_reg_readl(void __iomem *base, u32 reg)
>> +{
>> + return readl(base + reg);
>
> Ditto
>
Ok, i will remove wrappers function and direct call readl.
>> +};
>> +
>> +static void artpec8_pcie_phy_reg_update(void __iomem *base, u32 mask,
>> + u32 update, u32 reg)
>> +{
>> + u32 val;
>> +
>> + val = artpec8_pcie_phy_reg_readl(base, reg);
>> + val &= ~(mask);
>> + val |= update;
>> + artpec8_pcie_phy_reg_writel(base, val, reg);
>> +};
>> +
>
> (...)
>
>> +static int artpec8_pcie_phy_probe(struct platform_device *pdev)
>> +{
>> + struct device *dev = &pdev->dev;
>> + struct artpec8_pcie_phy *artpec8_phy;
>> + struct phy *generic_phy;
>> + struct phy_provider *phy_provider;
>> + const struct artpec8_pcie_phy_data *drv_data;
>> +
>> + drv_data = of_device_get_match_data(dev);
>> + if (!drv_data)
>> + return -ENODEV;
>> +
>> + artpec8_phy = devm_kzalloc(dev, sizeof(*artpec8_phy), GFP_KERNEL);
>> + if (!artpec8_phy)
>> + return -ENOMEM;
>> +
>> + /* reference clock */
>> + if (of_property_read_u32(dev->of_node, "lcpll-ref-clk",
>
> No, really, no...
>
> All properties *must* be documented in the bindings. You cannot sneak in
> some stuff here...
>
Ok, sure.
I will should be documented the all property.
>> + &artpec8_phy->lcpll_ref_clk)) {
>> + return -EINVAL;
>> + }
>> + /* PLL SOC reference clock */
>> + if (artpec8_phy->lcpll_ref_clk == REF_CLK_FROM_SOC_PLL) {
>> + artpec8_phy->soc_pll_clk = devm_clk_get(dev, "ref_clk");
>> + if (IS_ERR(artpec8_phy->soc_pll_clk))
>> + return -EINVAL;
>> + clk_prepare_enable(artpec8_phy->soc_pll_clk);
>> + }
>> +
>> + /* link mode */
>> + if (of_property_read_string(dev->of_node, "mode", &artpec8_phy->mode))
>> + return -EINVAL;
>> +
>> + /* number of lanes */
>> + if (of_property_read_u32(dev->of_node, "num-lanes",
>> + &artpec8_phy->num_lanes))
>> + return -EINVAL;
>> +
>> + if (artpec8_phy->num_lanes > LANE_MAX)
>> + return -EINVAL;
>> +
>> + /* PHY base register */
>> + artpec8_phy->phy_base = devm_platform_ioremap_resource_byname(pdev, "phy");
>> + if (IS_ERR(artpec8_phy->phy_base))
>> + return PTR_ERR(artpec8_phy->phy_base);
>> +
>> + /* PCS base register */
>> + artpec8_phy->pcs_base = devm_platform_ioremap_resource_byname(pdev, "pcs");
>> + if (IS_ERR(artpec8_phy->pcs_base))
>> + return PTR_ERR(artpec8_phy->pcs_base);
>> +
>> + /* sysreg regmap handle, need to change using smc */
>> + artpec8_phy->sysreg =
>> + syscon_regmap_lookup_by_phandle(dev->of_node,
>> + "samsung,fsys-sysreg");
>
> Nope. Usage of undocumented properties. Please post your DTS changes, so
> we can validate the user of this driver.
>
I will should be documented the all property.
> Best regards,
> Krzysztof
>
Thank you for kindness reivew.
I will return with v3 patchset which is applied review comments.
Best regards,
Wangseok Lee
^ permalink raw reply [flat|nested] 18+ messages in thread
end of thread, other threads:[~2022-06-08 6:01 UTC | newest]
Thread overview: 18+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
[not found] <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p6>
2022-06-03 1:54 ` [PATCH v2 0/5] Add support for Axis, ARTPEC-8 PCIe driver Wangseok Lee
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p5>
2022-06-03 2:23 ` [PATCH v2 1/5] dt-bindings: pci: Add ARTPEC-8 PCIe controller Wangseok Lee
2022-06-06 10:12 ` Krzysztof Kozlowski
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p8>
2022-06-08 3:30 ` Wangseok Lee
2022-06-08 3:30 ` [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy Wangseok Lee
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p2>
2022-06-03 2:34 ` [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver Wangseok Lee
2022-06-03 16:03 ` Bjorn Helgaas
2022-06-07 7:03 ` Jesper Nilsson
2022-06-06 10:23 ` Krzysztof Kozlowski
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p7>
2022-06-03 2:38 ` [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver Wangseok Lee
2022-06-06 10:28 ` Krzysztof Kozlowski
[not found] ` <CGME20220603015431epcms2p6203908cebe6a320854136559a32b54cb@epcms2p4>
2022-06-03 2:43 ` [PATCH v2 5/5] MAINTAINERS: Add maintainer for Axis " Wangseok Lee
2022-06-03 16:09 ` Bjorn Helgaas
2022-06-07 7:05 ` Jesper Nilsson
2022-06-08 3:31 ` [PATCH v2 3/5] PCI: axis: Add ARTPEC-8 PCIe controller driver Wangseok Lee
2022-06-03 2:31 ` [PATCH v2 2/5] dt-bindings: phy: Add ARTPEC-8 PCIe phy Wangseok Lee
2022-06-06 10:14 ` Krzysztof Kozlowski
2022-06-08 4:14 ` [PATCH v2 4/5] phy: Add ARTPEC-8 PCIe PHY driver Wangseok Lee
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).