From: Alyssa Rosenzweig <alyssa@rosenzweig.io>
To: linux-pci@vger.kernel.org
Cc: "Bjorn Helgaas" <bhelgaas@google.com>,
"Rob Herring" <robh+dt@kernel.org>,
"Lorenzo Pieralisi" <lorenzo.pieralisi@arm.com>,
"Krzysztof Wilczyński" <kw@linux.com>,
"Alyssa Rosenzweig" <alyssa@rosenzweig.io>,
"Stan Skowronek" <stan@corellium.com>,
"Marc Zyngier" <maz@kernel.org>,
"Mark Kettenis" <kettenis@openbsd.org>,
"Sven Peter" <sven@svenpeter.dev>,
"Hector Martin" <marcan@marcan.st>,
devicetree@vger.kernel.org, linux-kernel@vger.kernel.org
Subject: [PATCH v2 1/6] dt-bindings: pci: Add DT bindings for apple,pcie
Date: Sun, 15 Aug 2021 23:16:16 -0400 [thread overview]
Message-ID: <20210816031621.240268-2-alyssa@rosenzweig.io> (raw)
In-Reply-To: <20210816031621.240268-1-alyssa@rosenzweig.io>
From: Mark Kettenis <kettenis@openbsd.org>
The Apple PCIe host controller is a PCIe host controller with
multiple root ports present in Apple ARM SoC platforms, including
various iPhone and iPad devices and the "Apple Silicon" Macs.
Signed-off-by: Mark Kettenis <kettenis@openbsd.org>
Signed-off-by: Alyssa Rosenzweig <alyssa@rosenzweig.io>
---
.../devicetree/bindings/pci/apple,pcie.yaml | 166 ++++++++++++++++++
MAINTAINERS | 1 +
2 files changed, 167 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pci/apple,pcie.yaml
diff --git a/Documentation/devicetree/bindings/pci/apple,pcie.yaml b/Documentation/devicetree/bindings/pci/apple,pcie.yaml
new file mode 100644
index 000000000000..054f6f069833
--- /dev/null
+++ b/Documentation/devicetree/bindings/pci/apple,pcie.yaml
@@ -0,0 +1,166 @@
+# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/pci/apple,pcie.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Apple PCIe host controller
+
+maintainers:
+ - Mark Kettenis <kettenis@openbsd.org>
+
+description: |
+ The Apple PCIe host controller is a PCIe host controller with
+ multiple root ports present in Apple ARM SoC platforms, including
+ various iPhone and iPad devices and the "Apple Silicon" Macs.
+ The controller incorporates Synopsys DesigWare PCIe logic to
+ implements its root ports. But the ATU found on most DesignWare
+ PCIe host bridges is absent.
+ All root ports share a single ECAM space, but separate GPIOs are
+ used to take the PCI devices on those ports out of reset. Therefore
+ the standard "reset-gpio" and "max-link-speed" properties appear on
+ the child nodes that represent the PCI bridges that correspond to
+ the individual root ports.
+ MSIs are handled by the PCIe controller and translated into regular
+ interrupts. A range of 32 MSIs is provided. These 32 MSIs can be
+ distributed over the root ports as the OS sees fit by programming
+ the PCIe controller's port registers.
+
+allOf:
+ - $ref: /schemas/pci/pci-bus.yaml#
+
+properties:
+ compatible:
+ items:
+ - const: apple,t8103-pcie
+ - const: apple,pcie
+
+ reg:
+ minItems: 3
+ maxItems: 5
+
+ reg-names:
+ minItems: 3
+ maxItems: 5
+ items:
+ - const: config
+ - const: rc
+ - const: port0
+ - const: port1
+ - const: port2
+
+ ranges:
+ minItems: 2
+ maxItems: 2
+
+ interrupts:
+ description:
+ Interrupt specifiers.
+ minItems: 1
+ maxItems: 35
+
+ msi-controller: true
+ msi-parent: true
+
+ msi-ranges:
+ description:
+ A list of pairs <intid span>, where "intid" is the first
+ interrupt number that can be used as an MSI, and "span" the size
+ of that range.
+ $ref: /schemas/types.yaml#/definitions/uint32-matrix
+ items:
+ minItems: 2
+ maxItems: 2
+
+ iommu-map: true
+ iommu-map-mask: true
+
+required:
+ - compatible
+ - reg
+ - reg-names
+ - bus-range
+ - interrupts
+ - msi-controller
+ - msi-parent
+ - msi-ranges
+
+unevaluatedProperties: false
+
+examples:
+ - |
+ #include <dt-bindings/interrupt-controller/apple-aic.h>
+
+ soc {
+ #address-cells = <2>;
+ #size-cells = <2>;
+
+ pcie0: pcie@690000000 {
+ compatible = "apple,t8103-pcie", "apple,pcie";
+ device_type = "pci";
+
+ reg = <0x6 0x90000000 0x0 0x1000000>,
+ <0x6 0x80000000 0x0 0x4000>,
+ <0x6 0x81000000 0x0 0x8000>,
+ <0x6 0x82000000 0x0 0x8000>,
+ <0x6 0x83000000 0x0 0x8000>;
+ reg-names = "config", "rc", "port0", "port1", "port2";
+
+ interrupt-parent = <&aic>;
+ interrupts = <AIC_IRQ 695 IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_IRQ 698 IRQ_TYPE_LEVEL_HIGH>,
+ <AIC_IRQ 701 IRQ_TYPE_LEVEL_HIGH>;
+
+ msi-controller;
+ msi-parent = <&pcie0>;
+ msi-ranges = <704 32>;
+
+ iommu-map = <0x100 &dart0 1 1>,
+ <0x200 &dart1 1 1>,
+ <0x300 &dart2 1 1>;
+ iommu-map-mask = <0xff00>;
+
+ bus-range = <0 3>;
+ #address-cells = <3>;
+ #size-cells = <2>;
+ ranges = <0x43000000 0x6 0xa0000000 0x6 0xa0000000 0x0 0x20000000>,
+ <0x02000000 0x0 0xc0000000 0x6 0xc0000000 0x0 0x40000000>;
+
+ clocks = <&pcie_core_clk>, <&pcie_aux_clk>, <&pcie_ref_clk>;
+ pinctrl-0 = <&pcie_pins>;
+ pinctrl-names = "default";
+
+ pci@0,0 {
+ device_type = "pci";
+ reg = <0x0 0x0 0x0 0x0 0x0>;
+ reset-gpios = <&pinctrl_ap 152 0>;
+ max-link-speed = <2>;
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ ranges;
+ };
+
+ pci@1,0 {
+ device_type = "pci";
+ reg = <0x800 0x0 0x0 0x0 0x0>;
+ reset-gpios = <&pinctrl_ap 153 0>;
+ max-link-speed = <2>;
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ ranges;
+ };
+
+ pci@2,0 {
+ device_type = "pci";
+ reg = <0x1000 0x0 0x0 0x0 0x0>;
+ reset-gpios = <&pinctrl_ap 33 0>;
+ max-link-speed = <1>;
+
+ #address-cells = <3>;
+ #size-cells = <2>;
+ ranges;
+ };
+ };
+ };
diff --git a/MAINTAINERS b/MAINTAINERS
index b63403793c81..a5687cf6f925 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -1701,6 +1701,7 @@ C: irc://irc.oftc.net/asahi-dev
T: git https://github.com/AsahiLinux/linux.git
F: Documentation/devicetree/bindings/arm/apple.yaml
F: Documentation/devicetree/bindings/interrupt-controller/apple,aic.yaml
+F: Documentation/devicetree/bindings/pci/apple,pcie.yaml
F: Documentation/devicetree/bindings/pinctrl/apple,pinctrl.yaml
F: arch/arm64/boot/dts/apple/
F: drivers/irqchip/irq-apple-aic.c
--
2.30.2
next prev parent reply other threads:[~2021-08-16 3:16 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-16 3:16 [PATCH v2 0/6] Add PCI driver for the Apple M1 Alyssa Rosenzweig
2021-08-16 3:16 ` Alyssa Rosenzweig [this message]
2021-08-16 3:16 ` [PATCH v2 2/6] PCI: apple: Add initial hardware bring-up Alyssa Rosenzweig
2021-08-22 18:42 ` Mark Kettenis
2021-08-16 3:16 ` [PATCH v2 3/6] PCI: apple: Set up reference clocks when probing Alyssa Rosenzweig
2021-08-16 3:16 ` [PATCH v2 4/6] PCI: apple: Add MSI handling Alyssa Rosenzweig
2021-08-16 3:16 ` [PATCH v2 5/6] arm64: apple: Add pinctrl nodes Alyssa Rosenzweig
2021-08-16 3:16 ` [PATCH v2 6/6] arm64: apple: Add PCIe node Alyssa Rosenzweig
2021-08-22 18:28 ` Mark Kettenis
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