[PATCH v10 0/5] Add SPMI support for Mediatek SoC IC

[PATCH v10 0/5] Add SPMI support for Mediatek SoC IC

[Hsin-Hsiung Wang]

This series adds support for new SoC MT6873/MT8192/MT8195 to the spmi driver.
This series is based on Chun-Jie's patches[1][2].

[1] https://patchwork.kernel.org/project/linux-mediatek/list/?series=521127
[2] https://patchwork.kernel.org/project/linux-mediatek/list/?series=521655

changes since v9:
- rebase to v5.14-rc1.

Henry Chen (1):
  spmi: mediatek: Add support for MT8195

Hsin-Hsiung Wang (4):
  dt-bindings: spmi: modify the constraint 'maxItems' to 'minItems'
  dt-bindings: spmi: document binding for the Mediatek SPMI controller
  spmi: mediatek: Add support for MT6873/8192
  arm64: dts: mt8192: add spmi node

 .../bindings/spmi/mtk,spmi-mtk-pmif.yaml      |  76 +++
 .../devicetree/bindings/spmi/spmi.yaml        |   2 +-
 arch/arm64/boot/dts/mediatek/mt8192.dtsi      |  17 +
 drivers/spmi/Kconfig                          |  10 +
 drivers/spmi/Makefile                         |   2 +
 drivers/spmi/spmi-mtk-pmif.c                  | 555 ++++++++++++++++++
 6 files changed, 661 insertions(+), 1 deletion(-)
 create mode 100644 Documentation/devicetree/bindings/spmi/mtk,spmi-mtk-pmif.yaml
 create mode 100644 drivers/spmi/spmi-mtk-pmif.c


base-commit: e73f0f0ee7541171d89f2e2491130c7771ba58d3
prerequisite-patch-id: 8e70d378642e084a14296dbaa2aa4e07c1d30563
prerequisite-patch-id: 82ced16215cdd31201c6146ddb5c30bc17525996
prerequisite-patch-id: 7f2137e77cfc439c2e4b4e4369a6d6b48fec1ece
prerequisite-patch-id: 15f52bb664f0f0436627d056a53afefb0b99f67a
prerequisite-patch-id: 479b44dfdc6d7b367c0d441d8635d2dc02466057
prerequisite-patch-id: 5df1858972e343d3750cdda1063655fc232eb831
prerequisite-patch-id: 7e63a29430f65c2a0d56d7353df884645d70ed8c
prerequisite-patch-id: 2a6200e8a05329d51aaa4fd63aacfbba66d16177
prerequisite-patch-id: 604d2702c4217b77de3dc305ff08f630ba38fdb4
prerequisite-patch-id: d3ece2688dbd45eee248a8c6ba3206c0c673c904
prerequisite-patch-id: 1bebe1cd9b267c974cae50c3df8c0f8f4f0b0b3d
prerequisite-patch-id: 3b34fe85667da5287bde9fd2378359be4a126266
prerequisite-patch-id: 5d3d139212ab304739b75f7638251703b95948d5
prerequisite-patch-id: 621291b21be177a63eaf6769aa6d2ee8ddb2ea2b
prerequisite-patch-id: 024f786586b409420782d24218b15f05f6476667
prerequisite-patch-id: 946aae93303bde26226289dc389c94de96a9dacd
prerequisite-patch-id: b3ddf6f2079c3c269bd24091243030a971c43cbc
prerequisite-patch-id: 5c0e0308aa8eb06ca6df6f5467bc925f2cc106ad
prerequisite-patch-id: d4e481acd8b970f08d3e4da9c8fc0ad6e1fff551
prerequisite-patch-id: 99db7309fbe1b9f73a07e25d5174db8976c77a2c
prerequisite-patch-id: cffbc99e9e60f6db43cf7879f17e05c5b041d312
prerequisite-patch-id: 69871b871ab339881b50a2d6988173050b6c7a4f
prerequisite-patch-id: 4f5900b98a0c7cbe62694f2477a6cb410187714b
-- 
2.18.0
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[PATCH v10 1/5] dt-bindings: spmi: modify the constraint 'maxItems' to 'minItems'

[Hsin-Hsiung Wang]

The constraint of 'maxItem: 1' might be larger than 1, so we modify it
to 'minItem: 1'.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
---
changes since v9:
- No change.
---
 Documentation/devicetree/bindings/spmi/spmi.yaml | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/spmi/spmi.yaml b/Documentation/devicetree/bindings/spmi/spmi.yaml
index 1d243faef2f8..5938d807674f 100644
--- a/Documentation/devicetree/bindings/spmi/spmi.yaml
+++ b/Documentation/devicetree/bindings/spmi/spmi.yaml
@@ -25,7 +25,7 @@ properties:
     pattern: "^spmi@.*"
 
   reg:
-    maxItems: 1
+    minItems: 1
 
   "#address-cells":
     const: 2
-- 
2.18.0
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[PATCH v10 2/5] dt-bindings: spmi: document binding for the Mediatek SPMI controller

[Hsin-Hsiung Wang]

This adds documentation for the SPMI controller found on Mediatek SoCs.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
Reviewed-by: Rob Herring <robh@kernel.org>
---
changes since v9:
- No change.
---
 .../bindings/spmi/mtk,spmi-mtk-pmif.yaml      | 76 +++++++++++++++++++
 1 file changed, 76 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/spmi/mtk,spmi-mtk-pmif.yaml

diff --git a/Documentation/devicetree/bindings/spmi/mtk,spmi-mtk-pmif.yaml b/Documentation/devicetree/bindings/spmi/mtk,spmi-mtk-pmif.yaml
new file mode 100644
index 000000000000..a221cc1ac6c6
--- /dev/null
+++ b/Documentation/devicetree/bindings/spmi/mtk,spmi-mtk-pmif.yaml
@@ -0,0 +1,76 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/spmi/mtk,spmi-mtk-pmif.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek SPMI Controller Device Tree Bindings
+
+maintainers:
+  - Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
+
+description: |+
+  On MediaTek SoCs the PMIC is connected via SPMI and the controller allows
+  for multiple SoCs to control a single SPMI master.
+
+allOf:
+  - $ref: "spmi.yaml"
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt6873-spmi
+      - mediatek,mt8195-spmi
+
+  reg:
+    maxItems: 2
+
+  reg-names:
+    items:
+      - const: pmif
+      - const: spmimst
+
+  clocks:
+    minItems: 3
+    maxItems: 3
+
+  clock-names:
+    items:
+      - const: pmif_sys_ck
+      - const: pmif_tmr_ck
+      - const: spmimst_clk_mux
+
+  assigned-clocks:
+    maxItems: 1
+
+  assigned-clock-parents:
+    maxItems: 1
+
+required:
+  - compatible
+  - reg
+  - reg-names
+  - clocks
+  - clock-names
+
+unevaluatedProperties: false
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8192-clk.h>
+
+    spmi: spmi@10027000 {
+        compatible = "mediatek,mt6873-spmi";
+        reg = <0 0x10027000 0 0x000e00>,
+              <0 0x10029000 0 0x000100>;
+        reg-names = "pmif", "spmimst";
+        clocks = <&infracfg CLK_INFRA_PMIC_AP>,
+                 <&infracfg CLK_INFRA_PMIC_TMR>,
+                 <&topckgen CLK_TOP_SPMI_MST_SEL>;
+        clock-names = "pmif_sys_ck",
+                      "pmif_tmr_ck",
+                      "spmimst_clk_mux";
+        assigned-clocks = <&topckgen CLK_TOP_PWRAP_ULPOSC_SEL>;
+        assigned-clock-parents = <&topckgen CLK_TOP_OSC_D10>;
+    };
+...
-- 
2.18.0
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[PATCH v10 3/5] spmi: mediatek: Add support for MT6873/8192

[Hsin-Hsiung Wang]

Add spmi support for MT6873/8192.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
---
changes since v9:
- No change.
---
 drivers/spmi/Kconfig         |  10 +
 drivers/spmi/Makefile        |   2 +
 drivers/spmi/spmi-mtk-pmif.c | 465 +++++++++++++++++++++++++++++++++++
 3 files changed, 477 insertions(+)
 create mode 100644 drivers/spmi/spmi-mtk-pmif.c

diff --git a/drivers/spmi/Kconfig b/drivers/spmi/Kconfig
index 2874b6c26028..ea5703f6e544 100644
--- a/drivers/spmi/Kconfig
+++ b/drivers/spmi/Kconfig
@@ -34,4 +34,14 @@ config SPMI_MSM_PMIC_ARB
 	  This is required for communicating with Qualcomm PMICs and
 	  other devices that have the SPMI interface.
 
+config SPMI_MTK_PMIF
+	tristate "Mediatek SPMI Controller (PMIC Arbiter)"
+	help
+	  If you say yes to this option, support will be included for the
+	  built-in SPMI PMIC Arbiter interface on Mediatek family
+	  processors.
+
+	  This is required for communicating with Mediatek PMICs and
+	  other devices that have the SPMI interface.
+
 endif
diff --git a/drivers/spmi/Makefile b/drivers/spmi/Makefile
index 6e092e6f290c..0b21aaffcbb9 100644
--- a/drivers/spmi/Makefile
+++ b/drivers/spmi/Makefile
@@ -6,3 +6,5 @@ obj-$(CONFIG_SPMI)	+= spmi.o
 
 obj-$(CONFIG_SPMI_HISI3670)	+= hisi-spmi-controller.o
 obj-$(CONFIG_SPMI_MSM_PMIC_ARB)	+= spmi-pmic-arb.o
+obj-$(CONFIG_SPMI_MTK_PMIF)	+= spmi-mtk-pmif.o
+
diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
new file mode 100644
index 000000000000..94c45d46ab0c
--- /dev/null
+++ b/drivers/spmi/spmi-mtk-pmif.c
@@ -0,0 +1,465 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Copyright (c) 2021 MediaTek Inc.
+
+#include <linux/clk.h>
+#include <linux/iopoll.h>
+#include <linux/module.h>
+#include <linux/of_device.h>
+#include <linux/spmi.h>
+
+#define SWINF_IDLE	0x00
+#define SWINF_WFVLDCLR	0x06
+
+#define GET_SWINF(x)	(((x) >> 1) & 0x7)
+
+#define PMIF_CMD_REG_0		0
+#define PMIF_CMD_REG		1
+#define PMIF_CMD_EXT_REG	2
+#define PMIF_CMD_EXT_REG_LONG	3
+
+#define PMIF_DELAY_US   10
+#define PMIF_TIMEOUT_US (10 * 1000)
+
+#define PMIF_CHAN_OFFSET 0x5
+
+#define PMIF_MAX_CLKS	3
+
+#define SPMI_OP_ST_BUSY 1
+
+struct ch_reg {
+	u32 ch_sta;
+	u32 wdata;
+	u32 rdata;
+	u32 ch_send;
+	u32 ch_rdy;
+};
+
+struct pmif_data {
+	const u32	*regs;
+	const u32	*spmimst_regs;
+	u32	soc_chan;
+};
+
+struct pmif {
+	void __iomem	*base;
+	void __iomem	*spmimst_base;
+	struct ch_reg	chan;
+	struct clk_bulk_data clks[PMIF_MAX_CLKS];
+	u32 nclks;
+	const struct pmif_data *data;
+};
+
+static const char * const pmif_clock_names[] = {
+	"pmif_sys_ck", "pmif_tmr_ck", "spmimst_clk_mux",
+};
+
+enum pmif_regs {
+	PMIF_INIT_DONE,
+	PMIF_INF_EN,
+	PMIF_ARB_EN,
+	PMIF_CMDISSUE_EN,
+	PMIF_TIMER_CTRL,
+	PMIF_SPI_MODE_CTRL,
+	PMIF_IRQ_EVENT_EN_0,
+	PMIF_IRQ_FLAG_0,
+	PMIF_IRQ_CLR_0,
+	PMIF_IRQ_EVENT_EN_1,
+	PMIF_IRQ_FLAG_1,
+	PMIF_IRQ_CLR_1,
+	PMIF_IRQ_EVENT_EN_2,
+	PMIF_IRQ_FLAG_2,
+	PMIF_IRQ_CLR_2,
+	PMIF_IRQ_EVENT_EN_3,
+	PMIF_IRQ_FLAG_3,
+	PMIF_IRQ_CLR_3,
+	PMIF_IRQ_EVENT_EN_4,
+	PMIF_IRQ_FLAG_4,
+	PMIF_IRQ_CLR_4,
+	PMIF_WDT_EVENT_EN_0,
+	PMIF_WDT_FLAG_0,
+	PMIF_WDT_EVENT_EN_1,
+	PMIF_WDT_FLAG_1,
+	PMIF_SWINF_0_STA,
+	PMIF_SWINF_0_WDATA_31_0,
+	PMIF_SWINF_0_RDATA_31_0,
+	PMIF_SWINF_0_ACC,
+	PMIF_SWINF_0_VLD_CLR,
+	PMIF_SWINF_1_STA,
+	PMIF_SWINF_1_WDATA_31_0,
+	PMIF_SWINF_1_RDATA_31_0,
+	PMIF_SWINF_1_ACC,
+	PMIF_SWINF_1_VLD_CLR,
+	PMIF_SWINF_2_STA,
+	PMIF_SWINF_2_WDATA_31_0,
+	PMIF_SWINF_2_RDATA_31_0,
+	PMIF_SWINF_2_ACC,
+	PMIF_SWINF_2_VLD_CLR,
+	PMIF_SWINF_3_STA,
+	PMIF_SWINF_3_WDATA_31_0,
+	PMIF_SWINF_3_RDATA_31_0,
+	PMIF_SWINF_3_ACC,
+	PMIF_SWINF_3_VLD_CLR,
+};
+
+static const u32 mt6873_regs[] = {
+	[PMIF_INIT_DONE] =	0x0000,
+	[PMIF_INF_EN] =		0x0024,
+	[PMIF_ARB_EN] =		0x0150,
+	[PMIF_CMDISSUE_EN] =	0x03B4,
+	[PMIF_TIMER_CTRL] =	0x03E0,
+	[PMIF_SPI_MODE_CTRL] =	0x0400,
+	[PMIF_IRQ_EVENT_EN_0] =	0x0418,
+	[PMIF_IRQ_FLAG_0] =	0x0420,
+	[PMIF_IRQ_CLR_0] =	0x0424,
+	[PMIF_IRQ_EVENT_EN_1] =	0x0428,
+	[PMIF_IRQ_FLAG_1] =	0x0430,
+	[PMIF_IRQ_CLR_1] =	0x0434,
+	[PMIF_IRQ_EVENT_EN_2] =	0x0438,
+	[PMIF_IRQ_FLAG_2] =	0x0440,
+	[PMIF_IRQ_CLR_2] =	0x0444,
+	[PMIF_IRQ_EVENT_EN_3] =	0x0448,
+	[PMIF_IRQ_FLAG_3] =	0x0450,
+	[PMIF_IRQ_CLR_3] =	0x0454,
+	[PMIF_IRQ_EVENT_EN_4] =	0x0458,
+	[PMIF_IRQ_FLAG_4] =	0x0460,
+	[PMIF_IRQ_CLR_4] =	0x0464,
+	[PMIF_WDT_EVENT_EN_0] =	0x046C,
+	[PMIF_WDT_FLAG_0] =	0x0470,
+	[PMIF_WDT_EVENT_EN_1] =	0x0474,
+	[PMIF_WDT_FLAG_1] =	0x0478,
+	[PMIF_SWINF_0_ACC] =	0x0C00,
+	[PMIF_SWINF_0_WDATA_31_0] =	0x0C04,
+	[PMIF_SWINF_0_RDATA_31_0] =	0x0C14,
+	[PMIF_SWINF_0_VLD_CLR] =	0x0C24,
+	[PMIF_SWINF_0_STA] =	0x0C28,
+	[PMIF_SWINF_1_ACC] =	0x0C40,
+	[PMIF_SWINF_1_WDATA_31_0] =	0x0C44,
+	[PMIF_SWINF_1_RDATA_31_0] =	0x0C54,
+	[PMIF_SWINF_1_VLD_CLR] =	0x0C64,
+	[PMIF_SWINF_1_STA] =	0x0C68,
+	[PMIF_SWINF_2_ACC] =	0x0C80,
+	[PMIF_SWINF_2_WDATA_31_0] =	0x0C84,
+	[PMIF_SWINF_2_RDATA_31_0] =	0x0C94,
+	[PMIF_SWINF_2_VLD_CLR] =	0x0CA4,
+	[PMIF_SWINF_2_STA] =	0x0CA8,
+	[PMIF_SWINF_3_ACC] =	0x0CC0,
+	[PMIF_SWINF_3_WDATA_31_0] =	0x0CC4,
+	[PMIF_SWINF_3_RDATA_31_0] =	0x0CD4,
+	[PMIF_SWINF_3_VLD_CLR] =	0x0CE4,
+	[PMIF_SWINF_3_STA] =	0x0CE8,
+};
+
+enum spmi_regs {
+	SPMI_OP_ST_CTRL,
+	SPMI_GRP_ID_EN,
+	SPMI_OP_ST_STA,
+	SPMI_MST_SAMPL,
+	SPMI_MST_REQ_EN,
+	SPMI_REC_CTRL,
+	SPMI_REC0,
+	SPMI_REC1,
+	SPMI_REC2,
+	SPMI_REC3,
+	SPMI_REC4,
+	SPMI_MST_DBG,
+};
+
+static const u32 mt6873_spmi_regs[] = {
+	[SPMI_OP_ST_CTRL] =	0x0000,
+	[SPMI_GRP_ID_EN] =	0x0004,
+	[SPMI_OP_ST_STA] =	0x0008,
+	[SPMI_MST_SAMPL] =	0x000c,
+	[SPMI_MST_REQ_EN] =	0x0010,
+	[SPMI_REC_CTRL] =	0x0040,
+	[SPMI_REC0] =		0x0044,
+	[SPMI_REC1] =		0x0048,
+	[SPMI_REC2] =		0x004c,
+	[SPMI_REC3] =		0x0050,
+	[SPMI_REC4] =		0x0054,
+	[SPMI_MST_DBG] =	0x00fc,
+};
+
+static u32 pmif_readl(struct pmif *arb, enum pmif_regs reg)
+{
+	return readl(arb->base + arb->data->regs[reg]);
+}
+
+static void pmif_writel(struct pmif *arb, u32 val, enum pmif_regs reg)
+{
+	writel(val, arb->base + arb->data->regs[reg]);
+}
+
+static void mtk_spmi_writel(struct pmif *arb, u32 val, enum spmi_regs reg)
+{
+	writel(val, arb->spmimst_base + arb->data->spmimst_regs[reg]);
+}
+
+static bool pmif_is_fsm_vldclr(struct pmif *arb)
+{
+	u32 reg_rdata;
+
+	reg_rdata = pmif_readl(arb, arb->chan.ch_sta);
+	return GET_SWINF(reg_rdata) == SWINF_WFVLDCLR;
+}
+
+static int pmif_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
+{
+	struct pmif *arb = spmi_controller_get_drvdata(ctrl);
+	u32 rdata, cmd;
+	int ret;
+
+	/* Check the opcode */
+	if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP)
+		return -EINVAL;
+
+	cmd = opc - SPMI_CMD_RESET;
+
+	mtk_spmi_writel(arb, (cmd << 0x4) | sid, SPMI_OP_ST_CTRL);
+	ret = readl_poll_timeout_atomic(arb->spmimst_base + arb->data->spmimst_regs[SPMI_OP_ST_STA],
+					rdata, (rdata & SPMI_OP_ST_BUSY) == SPMI_OP_ST_BUSY,
+					PMIF_DELAY_US, PMIF_TIMEOUT_US);
+	if (ret < 0)
+		dev_err(&ctrl->dev, "timeout, err = %d\n", ret);
+
+	return ret;
+}
+
+static int pmif_spmi_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
+			      u16 addr, u8 *buf, size_t len)
+{
+	struct pmif *arb = spmi_controller_get_drvdata(ctrl);
+	struct ch_reg *inf_reg;
+	int ret;
+	u32 data, cmd;
+
+	/* Check for argument validation. */
+	if (sid & ~0xf) {
+		dev_err(&ctrl->dev, "exceed the max slv id\n");
+		return -EINVAL;
+	}
+
+	if (len > 4) {
+		dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);
+		return -EINVAL;
+	}
+
+	if (opc >= 0x60 && opc <= 0x7f)
+		opc = PMIF_CMD_REG;
+	else if ((opc >= 0x20 && opc <= 0x2f) || (opc >= 0x38 && opc <= 0x3f))
+		opc = PMIF_CMD_EXT_REG_LONG;
+	else
+		return -EINVAL;
+
+	/* Wait for Software Interface FSM state to be IDLE. */
+	inf_reg = &arb->chan;
+	ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
+					data, GET_SWINF(data) == SWINF_IDLE,
+					PMIF_DELAY_US, PMIF_TIMEOUT_US);
+	if (ret < 0) {
+		/* set channel ready if the data has transferred */
+		if (pmif_is_fsm_vldclr(arb))
+			pmif_writel(arb, 1, inf_reg->ch_rdy);
+		dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
+		goto out;
+	}
+
+	/* Send the command. */
+	cmd = (opc << 30) | (sid << 24) | ((len - 1) << 16) | addr;
+	pmif_writel(arb, cmd, inf_reg->ch_send);
+
+	/*
+	 * Wait for Software Interface FSM state to be WFVLDCLR,
+	 * read the data and clear the valid flag.
+	 */
+	ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
+					data, GET_SWINF(data) == SWINF_WFVLDCLR,
+					PMIF_DELAY_US, PMIF_TIMEOUT_US);
+	if (ret < 0) {
+		dev_err(&ctrl->dev, "failed to wait for SWINF_WFVLDCLR\n");
+		goto out;
+	}
+
+	data = pmif_readl(arb, inf_reg->rdata);
+	memcpy(buf, &data, len);
+	pmif_writel(arb, 1, inf_reg->ch_rdy);
+
+out:
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int pmif_spmi_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
+			       u16 addr, const u8 *buf, size_t len)
+{
+	struct pmif *arb = spmi_controller_get_drvdata(ctrl);
+	struct ch_reg *inf_reg;
+	int ret;
+	u32 data, cmd;
+
+	if (len > 4) {
+		dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);
+		return -EINVAL;
+	}
+
+	/* Check the opcode */
+	if (opc >= 0x40 && opc <= 0x5F)
+		opc = PMIF_CMD_REG;
+	else if ((opc <= 0xF) || (opc >= 0x30 && opc <= 0x37))
+		opc = PMIF_CMD_EXT_REG_LONG;
+	else if (opc >= 0x80)
+		opc = PMIF_CMD_REG_0;
+	else
+		return -EINVAL;
+
+	/* Wait for Software Interface FSM state to be IDLE. */
+	inf_reg = &arb->chan;
+	ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
+					data, GET_SWINF(data) == SWINF_IDLE,
+					PMIF_DELAY_US, PMIF_TIMEOUT_US);
+	if (ret < 0) {
+		/* set channel ready if the data has transferred */
+		if (pmif_is_fsm_vldclr(arb))
+			pmif_writel(arb, 1, inf_reg->ch_rdy);
+		dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
+		goto out;
+	}
+
+	/* Set the write data. */
+	memcpy(&data, buf, len);
+	pmif_writel(arb, data, inf_reg->wdata);
+
+	/* Send the command. */
+	cmd = (opc << 30) | BIT(29) | (sid << 24) | ((len - 1) << 16) | addr;
+	pmif_writel(arb, cmd, inf_reg->ch_send);
+
+out:
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static const struct pmif_data mt6873_pmif_arb = {
+	.regs = mt6873_regs,
+	.spmimst_regs = mt6873_spmi_regs,
+	.soc_chan = 2,
+};
+
+static int mtk_spmi_probe(struct platform_device *pdev)
+{
+	struct pmif *arb;
+	struct spmi_controller *ctrl;
+	int err, i;
+	u32 chan_offset;
+
+	ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*arb));
+	if (!ctrl)
+		return -ENOMEM;
+
+	arb = spmi_controller_get_drvdata(ctrl);
+	arb->data = of_device_get_match_data(&pdev->dev);
+	if (!arb->data) {
+		err = -EINVAL;
+		dev_err(&pdev->dev, "Cannot get drv_data\n");
+		goto err_put_ctrl;
+	}
+
+	arb->base = devm_platform_ioremap_resource_byname(pdev, "pmif");
+	if (IS_ERR(arb->base)) {
+		err = PTR_ERR(arb->base);
+		dev_err(&pdev->dev, "pmif failed to get the remappped memory\n");
+		goto err_put_ctrl;
+	}
+
+	arb->spmimst_base = devm_platform_ioremap_resource_byname(pdev, "spmimst");
+	if (IS_ERR(arb->spmimst_base)) {
+		err = PTR_ERR(arb->spmimst_base);
+		dev_err(&pdev->dev, "spmimst failed to get the remappped memory\n");
+		goto err_put_ctrl;
+	}
+
+	arb->nclks = ARRAY_SIZE(pmif_clock_names);
+	if (arb->nclks > PMIF_MAX_CLKS) {
+		err = -EINVAL;
+		dev_err(&pdev->dev, "exceed the max clock numbers\n");
+		goto err_put_ctrl;
+	}
+
+	for (i = 0; i < arb->nclks; i++)
+		arb->clks[i].id = pmif_clock_names[i];
+
+	err = devm_clk_bulk_get(&pdev->dev, arb->nclks, arb->clks);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to get clocks: %d\n", err);
+		goto err_put_ctrl;
+	}
+
+	err = clk_bulk_prepare_enable(arb->nclks, arb->clks);
+	if (err) {
+		dev_err(&pdev->dev, "Failed to enable clocks: %d\n", err);
+		goto err_put_ctrl;
+	}
+
+	ctrl->cmd = pmif_arb_cmd;
+	ctrl->read_cmd = pmif_spmi_read_cmd;
+	ctrl->write_cmd = pmif_spmi_write_cmd;
+
+	chan_offset = PMIF_CHAN_OFFSET * arb->data->soc_chan;
+	arb->chan.ch_sta = PMIF_SWINF_0_STA + chan_offset;
+	arb->chan.wdata = PMIF_SWINF_0_WDATA_31_0 + chan_offset;
+	arb->chan.rdata = PMIF_SWINF_0_RDATA_31_0 + chan_offset;
+	arb->chan.ch_send = PMIF_SWINF_0_ACC + chan_offset;
+	arb->chan.ch_rdy = PMIF_SWINF_0_VLD_CLR + chan_offset;
+
+	platform_set_drvdata(pdev, ctrl);
+
+	err = spmi_controller_add(ctrl);
+	if (err)
+		goto err_domain_remove;
+
+	return 0;
+
+err_domain_remove:
+	clk_bulk_disable_unprepare(arb->nclks, arb->clks);
+err_put_ctrl:
+	spmi_controller_put(ctrl);
+	return err;
+}
+
+static int mtk_spmi_remove(struct platform_device *pdev)
+{
+	struct spmi_controller *ctrl = platform_get_drvdata(pdev);
+	struct pmif *arb = spmi_controller_get_drvdata(ctrl);
+
+	clk_bulk_disable_unprepare(arb->nclks, arb->clks);
+	spmi_controller_remove(ctrl);
+	spmi_controller_put(ctrl);
+	return 0;
+}
+
+static const struct of_device_id mtk_spmi_match_table[] = {
+	{
+		.compatible = "mediatek,mt6873-spmi",
+		.data = &mt6873_pmif_arb,
+	}, {
+		/* sentinel */
+	},
+};
+MODULE_DEVICE_TABLE(of, mtk_spmi_match_table);
+
+static struct platform_driver mtk_spmi_driver = {
+	.driver		= {
+		.name	= "spmi-mtk",
+		.of_match_table = of_match_ptr(mtk_spmi_match_table),
+	},
+	.probe		= mtk_spmi_probe,
+	.remove		= mtk_spmi_remove,
+};
+module_platform_driver(mtk_spmi_driver);
+
+MODULE_AUTHOR("Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>");
+MODULE_DESCRIPTION("MediaTek SPMI Driver");
+MODULE_LICENSE("GPL");
-- 
2.18.0
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[PATCH v10 4/5] spmi: mediatek: Add support for MT8195

[Hsin-Hsiung Wang]

From: Henry Chen <henryc.chen@mediatek.com>

Add spmi support for MT8195.

Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
---
changes since v9:
- No change.
---
 drivers/spmi/spmi-mtk-pmif.c | 90 ++++++++++++++++++++++++++++++++++++
 1 file changed, 90 insertions(+)

diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
index 94c45d46ab0c..0c320801c9d5 100644
--- a/drivers/spmi/spmi-mtk-pmif.c
+++ b/drivers/spmi/spmi-mtk-pmif.c
@@ -150,6 +150,54 @@ static const u32 mt6873_regs[] = {
 	[PMIF_SWINF_3_STA] =	0x0CE8,
 };
 
+static const u32 mt8195_regs[] = {
+	[PMIF_INIT_DONE] =			0x0000,
+	[PMIF_INF_EN] =				0x0024,
+	[PMIF_ARB_EN] =				0x0150,
+	[PMIF_CMDISSUE_EN] =			0x03B8,
+	[PMIF_TIMER_CTRL] =			0x03E4,
+	[PMIF_SPI_MODE_CTRL] =			0x0408,
+	[PMIF_IRQ_EVENT_EN_0] =			0x0420,
+	[PMIF_IRQ_FLAG_0] =			0x0428,
+	[PMIF_IRQ_CLR_0] =			0x042C,
+	[PMIF_IRQ_EVENT_EN_1] =			0x0430,
+	[PMIF_IRQ_FLAG_1] =			0x0438,
+	[PMIF_IRQ_CLR_1] =			0x043C,
+	[PMIF_IRQ_EVENT_EN_2] =			0x0440,
+	[PMIF_IRQ_FLAG_2] =			0x0448,
+	[PMIF_IRQ_CLR_2] =			0x044C,
+	[PMIF_IRQ_EVENT_EN_3] =			0x0450,
+	[PMIF_IRQ_FLAG_3] =			0x0458,
+	[PMIF_IRQ_CLR_3] =			0x045C,
+	[PMIF_IRQ_EVENT_EN_4] =			0x0460,
+	[PMIF_IRQ_FLAG_4] =			0x0468,
+	[PMIF_IRQ_CLR_4] =			0x046C,
+	[PMIF_WDT_EVENT_EN_0] =			0x0474,
+	[PMIF_WDT_FLAG_0] =			0x0478,
+	[PMIF_WDT_EVENT_EN_1] =			0x047C,
+	[PMIF_WDT_FLAG_1] =			0x0480,
+	[PMIF_SWINF_0_ACC] =			0x0800,
+	[PMIF_SWINF_0_WDATA_31_0] =		0x0804,
+	[PMIF_SWINF_0_RDATA_31_0] =		0x0814,
+	[PMIF_SWINF_0_VLD_CLR] =		0x0824,
+	[PMIF_SWINF_0_STA] =			0x0828,
+	[PMIF_SWINF_1_ACC] =			0x0840,
+	[PMIF_SWINF_1_WDATA_31_0] =		0x0844,
+	[PMIF_SWINF_1_RDATA_31_0] =		0x0854,
+	[PMIF_SWINF_1_VLD_CLR] =		0x0864,
+	[PMIF_SWINF_1_STA] =			0x0868,
+	[PMIF_SWINF_2_ACC] =			0x0880,
+	[PMIF_SWINF_2_WDATA_31_0] =		0x0884,
+	[PMIF_SWINF_2_RDATA_31_0] =		0x0894,
+	[PMIF_SWINF_2_VLD_CLR] =		0x08A4,
+	[PMIF_SWINF_2_STA] =			0x08A8,
+	[PMIF_SWINF_3_ACC] =			0x08C0,
+	[PMIF_SWINF_3_WDATA_31_0] =		0x08C4,
+	[PMIF_SWINF_3_RDATA_31_0] =		0x08D4,
+	[PMIF_SWINF_3_VLD_CLR] =		0x08E4,
+	[PMIF_SWINF_3_STA] =			0x08E8,
+};
+
 enum spmi_regs {
 	SPMI_OP_ST_CTRL,
 	SPMI_GRP_ID_EN,
@@ -163,6 +211,15 @@ enum spmi_regs {
 	SPMI_REC3,
 	SPMI_REC4,
 	SPMI_MST_DBG,
+
+	/* MT8195 spmi regs */
+	SPMI_MST_RCS_CTRL,
+	SPMI_SLV_3_0_EINT,
+	SPMI_SLV_7_4_EINT,
+	SPMI_SLV_B_8_EINT,
+	SPMI_SLV_F_C_EINT,
+	SPMI_REC_CMD_DEC,
+	SPMI_DEC_DBG,
 };
 
 static const u32 mt6873_spmi_regs[] = {
@@ -180,6 +237,28 @@ static const u32 mt6873_spmi_regs[] = {
 	[SPMI_MST_DBG] =	0x00fc,
 };
 
+static const u32 mt8195_spmi_regs[] = {
+	[SPMI_OP_ST_CTRL] =	0x0000,
+	[SPMI_GRP_ID_EN] =	0x0004,
+	[SPMI_OP_ST_STA] =	0x0008,
+	[SPMI_MST_SAMPL] =	0x000C,
+	[SPMI_MST_REQ_EN] =	0x0010,
+	[SPMI_MST_RCS_CTRL] =	0x0014,
+	[SPMI_SLV_3_0_EINT] =	0x0020,
+	[SPMI_SLV_7_4_EINT] =	0x0024,
+	[SPMI_SLV_B_8_EINT] =	0x0028,
+	[SPMI_SLV_F_C_EINT] =	0x002C,
+	[SPMI_REC_CTRL] =	0x0040,
+	[SPMI_REC0] =		0x0044,
+	[SPMI_REC1] =		0x0048,
+	[SPMI_REC2] =		0x004C,
+	[SPMI_REC3] =		0x0050,
+	[SPMI_REC4] =		0x0054,
+	[SPMI_REC_CMD_DEC] =	0x005C,
+	[SPMI_DEC_DBG] =	0x00F8,
+	[SPMI_MST_DBG] =	0x00FC,
+};
+
 static u32 pmif_readl(struct pmif *arb, enum pmif_regs reg)
 {
 	return readl(arb->base + arb->data->regs[reg]);
@@ -348,6 +427,14 @@ static const struct pmif_data mt6873_pmif_arb = {
 	.soc_chan = 2,
 };
 
+static const struct pmif_data mt8195_pmif_arb[] = {
+	{
+		.regs = mt8195_regs,
+		.spmimst_regs = mt8195_spmi_regs,
+		.soc_chan = 2,
+	},
+};
+
 static int mtk_spmi_probe(struct platform_device *pdev)
 {
 	struct pmif *arb;
@@ -444,6 +531,9 @@ static const struct of_device_id mtk_spmi_match_table[] = {
 	{
 		.compatible = "mediatek,mt6873-spmi",
 		.data = &mt6873_pmif_arb,
+	}, {
+		.compatible = "mediatek,mt8195-spmi",
+		.data = &mt8195_pmif_arb,
 	}, {
 		/* sentinel */
 	},
-- 
2.18.0
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[PATCH v10 5/5] arm64: dts: mt8192: add spmi node

[Hsin-Hsiung Wang]

Add spmi node to SOC MT8192.

Signed-off-by: Hsin-Hsiung Wang <hsin-hsiung.wang@mediatek.com>
---
changes since v9:
- No change.
---
 arch/arm64/boot/dts/mediatek/mt8192.dtsi | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/arch/arm64/boot/dts/mediatek/mt8192.dtsi b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
index 9810f1d441da..1237e3624e44 100644
--- a/arch/arm64/boot/dts/mediatek/mt8192.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt8192.dtsi
@@ -316,6 +316,23 @@
 			clock-names = "clk13m";
 		};
 
+		spmi: spmi@10027000 {
+			compatible = "mediatek,mt6873-spmi";
+			reg = <0 0x10027000 0 0x000e00>,
+			      <0 0x10029000 0 0x000100>;
+			reg-names = "pmif", "spmimst";
+			clocks = <&infracfg CLK_INFRA_PMIC_AP>,
+				 <&infracfg CLK_INFRA_PMIC_TMR>,
+				 <&topckgen CLK_TOP_SPMI_MST_SEL>;
+			clock-names = "pmif_sys_ck",
+				      "pmif_tmr_ck",
+				      "spmimst_clk_mux";
+			assigned-clocks = <&topckgen CLK_TOP_PWRAP_ULPOSC_SEL>;
+			assigned-clock-parents = <&topckgen CLK_TOP_OSC_D10>;
+			#address-cells = <2>;
+			#size-cells = <0>;
+		};
+
 		scp_adsp: clock-controller@10720000 {
 			compatible = "mediatek,mt8192-scp_adsp";
 			reg = <0 0x10720000 0 0x1000>;
-- 
2.18.0
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Re: [PATCH v10 4/5] spmi: mediatek: Add support for MT8195

[Stephen Boyd]

Quoting Hsin-Hsiung Wang (2021-08-02 23:34:20)
> From: Henry Chen <henryc.chen@mediatek.com>
> 
> Add spmi support for MT8195.
> 
> Signed-off-by: Henry Chen <henryc.chen@mediatek.com>

Missing Signed-off-by from hsin-hsiung.wang here

> ---
> changes since v9:
> - No change.
> ---
>  drivers/spmi/spmi-mtk-pmif.c | 90 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 90 insertions(+)
> 
> diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
> index 94c45d46ab0c..0c320801c9d5 100644
> --- a/drivers/spmi/spmi-mtk-pmif.c
> +++ b/drivers/spmi/spmi-mtk-pmif.c
> @@ -348,6 +427,14 @@ static const struct pmif_data mt6873_pmif_arb = {
>         .soc_chan = 2,
>  };
>  
> +static const struct pmif_data mt8195_pmif_arb[] = {

This is an array of type pmif_data.

> +       {
> +               .regs = mt8195_regs,
> +               .spmimst_regs = mt8195_spmi_regs,
> +               .soc_chan = 2,
> +       },
> +};
> +
>  static int mtk_spmi_probe(struct platform_device *pdev)
>  {
>         struct pmif *arb;
> @@ -444,6 +531,9 @@ static const struct of_device_id mtk_spmi_match_table[] = {
>         {
>                 .compatible = "mediatek,mt6873-spmi",
>                 .data = &mt6873_pmif_arb,

mt6873_pmif_arb is not an array, see the context header above.

How does this work? Has this been tested?

> +       }, {
> +               .compatible = "mediatek,mt8195-spmi",
> +               .data = &mt8195_pmif_arb,
>         }, {
>                 /* sentinel */
>         },
> -- 
> 2.18.0
>

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Re: [PATCH v10 4/5] spmi: mediatek: Add support for MT8195

[Hsin-hsiung Wang]

Hi,

On Fri, 2021-08-06 at 10:49 -0700, Stephen Boyd wrote:
> Quoting Hsin-Hsiung Wang (2021-08-02 23:34:20)
> > From: Henry Chen <henryc.chen@mediatek.com>
> > 
> > Add spmi support for MT8195.
> > 
> > Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
> 
> Missing Signed-off-by from hsin-hsiung.wang here
> 

Sorry for the missing. I will add it in the next patch.

Thanks.

> > ---
> > changes since v9:
> > - No change.
> > ---
> >  drivers/spmi/spmi-mtk-pmif.c | 90 ++++++++++++++++++++++++++++++++++++
> >  1 file changed, 90 insertions(+)
> > 
> > diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
> > index 94c45d46ab0c..0c320801c9d5 100644
> > --- a/drivers/spmi/spmi-mtk-pmif.c
> > +++ b/drivers/spmi/spmi-mtk-pmif.c
> > @@ -348,6 +427,14 @@ static const struct pmif_data mt6873_pmif_arb = {
> >         .soc_chan = 2,
> >  };
> >  
> > +static const struct pmif_data mt8195_pmif_arb[] = {
> 
> This is an array of type pmif_data.
> 
> > +       {
> > +               .regs = mt8195_regs,
> > +               .spmimst_regs = mt8195_spmi_regs,
> > +               .soc_chan = 2,
> > +       },
> > +};
> > +
> >  static int mtk_spmi_probe(struct platform_device *pdev)
> >  {
> >         struct pmif *arb;
> > @@ -444,6 +531,9 @@ static const struct of_device_id mtk_spmi_match_table[] = {
> >         {
> >                 .compatible = "mediatek,mt6873-spmi",
> >                 .data = &mt6873_pmif_arb,
> 
> mt6873_pmif_arb is not an array, see the context header above.
> 
> How does this work? Has this been tested?
> 
> > +       }, {
> > +               .compatible = "mediatek,mt8195-spmi",
> > +               .data = &mt8195_pmif_arb,
> >         }, {
> >                 /* sentinel */
> >         },
> > -- 
> > 2.18.0
> >

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Re: [PATCH v10 4/5] spmi: mediatek: Add support for MT8195

[Hsin-hsiung Wang]

Hi,
sorry for missing other comments, I will confirm it internally and
update it.

Thanks a lot.

On Fri, 2021-08-06 at 10:49 -0700, Stephen Boyd wrote:
> Quoting Hsin-Hsiung Wang (2021-08-02 23:34:20)
> > From: Henry Chen <henryc.chen@mediatek.com>
> > 
> > Add spmi support for MT8195.
> > 
> > Signed-off-by: Henry Chen <henryc.chen@mediatek.com>
> 
> Missing Signed-off-by from hsin-hsiung.wang here
> 
> > ---
> > changes since v9:
> > - No change.
> > ---
> >  drivers/spmi/spmi-mtk-pmif.c | 90 ++++++++++++++++++++++++++++++++++++
> >  1 file changed, 90 insertions(+)
> > 
> > diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
> > index 94c45d46ab0c..0c320801c9d5 100644
> > --- a/drivers/spmi/spmi-mtk-pmif.c
> > +++ b/drivers/spmi/spmi-mtk-pmif.c
> > @@ -348,6 +427,14 @@ static const struct pmif_data mt6873_pmif_arb = {
> >         .soc_chan = 2,
> >  };
> >  
> > +static const struct pmif_data mt8195_pmif_arb[] = {
> 
> This is an array of type pmif_data.
> 
> > +       {
> > +               .regs = mt8195_regs,
> > +               .spmimst_regs = mt8195_spmi_regs,
> > +               .soc_chan = 2,
> > +       },
> > +};
> > +
> >  static int mtk_spmi_probe(struct platform_device *pdev)
> >  {
> >         struct pmif *arb;
> > @@ -444,6 +531,9 @@ static const struct of_device_id mtk_spmi_match_table[] = {
> >         {
> >                 .compatible = "mediatek,mt6873-spmi",
> >                 .data = &mt6873_pmif_arb,
> 
> mt6873_pmif_arb is not an array, see the context header above.
> 
> How does this work? Has this been tested?
> 
> > +       }, {
> > +               .compatible = "mediatek,mt8195-spmi",
> > +               .data = &mt8195_pmif_arb,
> >         }, {
> >                 /* sentinel */
> >         },
> > -- 
> > 2.18.0
> >

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Re: [PATCH v10 3/5] spmi: mediatek: Add support for MT6873/8192

[Stephen Boyd]

Quoting Hsin-Hsiung Wang (2021-08-02 23:34:19)
> diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
> new file mode 100644
> index 000000000000..94c45d46ab0c
> --- /dev/null
> +++ b/drivers/spmi/spmi-mtk-pmif.c
> @@ -0,0 +1,465 @@
> +// SPDX-License-Identifier: GPL-2.0
> +//
> +// Copyright (c) 2021 MediaTek Inc.
> +
> +#include <linux/clk.h>
> +#include <linux/iopoll.h>
> +#include <linux/module.h>
> +#include <linux/of_device.h>

include platform_device.h for the platform device driver that this is.

> +#include <linux/spmi.h>
> +
> +#define SWINF_IDLE     0x00
> +#define SWINF_WFVLDCLR 0x06
> +
> +#define GET_SWINF(x)   (((x) >> 1) & 0x7)
> +
> +#define PMIF_CMD_REG_0         0
> +#define PMIF_CMD_REG           1
> +#define PMIF_CMD_EXT_REG       2
> +#define PMIF_CMD_EXT_REG_LONG  3
> +
> +#define PMIF_DELAY_US   10
> +#define PMIF_TIMEOUT_US (10 * 1000)
> +
> +#define PMIF_CHAN_OFFSET 0x5
> +
> +#define PMIF_MAX_CLKS  3
> +
> +#define SPMI_OP_ST_BUSY 1
> +
> +struct ch_reg {
> +       u32 ch_sta;
> +       u32 wdata;
> +       u32 rdata;
> +       u32 ch_send;
> +       u32 ch_rdy;
> +};
> +
> +struct pmif_data {
> +       const u32       *regs;
> +       const u32       *spmimst_regs;
> +       u32     soc_chan;
> +};
> +
> +struct pmif {
> +       void __iomem    *base;
> +       void __iomem    *spmimst_base;
> +       struct ch_reg   chan;
> +       struct clk_bulk_data clks[PMIF_MAX_CLKS];
> +       u32 nclks;

size_t? Surely 32-bits isn't important.

> +       const struct pmif_data *data;
> +};
> +
> +static const char * const pmif_clock_names[] = {
> +       "pmif_sys_ck", "pmif_tmr_ck", "spmimst_clk_mux",
> +};
[...]
> +
> +static bool pmif_is_fsm_vldclr(struct pmif *arb)
> +{
> +       u32 reg_rdata;
> +
> +       reg_rdata = pmif_readl(arb, arb->chan.ch_sta);

Newline here please.

> +       return GET_SWINF(reg_rdata) == SWINF_WFVLDCLR;
> +}
> +
> +static int pmif_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
> +{
> +       struct pmif *arb = spmi_controller_get_drvdata(ctrl);
> +       u32 rdata, cmd;
> +       int ret;
> +
> +       /* Check the opcode */
> +       if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP)
> +               return -EINVAL;
> +
> +       cmd = opc - SPMI_CMD_RESET;
> +
> +       mtk_spmi_writel(arb, (cmd << 0x4) | sid, SPMI_OP_ST_CTRL);
> +       ret = readl_poll_timeout_atomic(arb->spmimst_base + arb->data->spmimst_regs[SPMI_OP_ST_STA],
> +                                       rdata, (rdata & SPMI_OP_ST_BUSY) == SPMI_OP_ST_BUSY,
> +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> +       if (ret < 0)
> +               dev_err(&ctrl->dev, "timeout, err = %d\n", ret);
> +
> +       return ret;
> +}
> +
> +static int pmif_spmi_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> +                             u16 addr, u8 *buf, size_t len)
> +{
> +       struct pmif *arb = spmi_controller_get_drvdata(ctrl);
> +       struct ch_reg *inf_reg;
> +       int ret;
> +       u32 data, cmd;
> +
> +       /* Check for argument validation. */
> +       if (sid & ~0xf) {
> +               dev_err(&ctrl->dev, "exceed the max slv id\n");
> +               return -EINVAL;
> +       }
> +
> +       if (len > 4) {
> +               dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);

Missing newline

> +               return -EINVAL;
> +       }
> +
> +       if (opc >= 0x60 && opc <= 0x7f)
> +               opc = PMIF_CMD_REG;
> +       else if ((opc >= 0x20 && opc <= 0x2f) || (opc >= 0x38 && opc <= 0x3f))
> +               opc = PMIF_CMD_EXT_REG_LONG;
> +       else
> +               return -EINVAL;
> +
> +       /* Wait for Software Interface FSM state to be IDLE. */
> +       inf_reg = &arb->chan;
> +       ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
> +                                       data, GET_SWINF(data) == SWINF_IDLE,
> +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> +       if (ret < 0) {
> +               /* set channel ready if the data has transferred */
> +               if (pmif_is_fsm_vldclr(arb))
> +                       pmif_writel(arb, 1, inf_reg->ch_rdy);
> +               dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
> +               goto out;
> +       }
> +
> +       /* Send the command. */
> +       cmd = (opc << 30) | (sid << 24) | ((len - 1) << 16) | addr;
> +       pmif_writel(arb, cmd, inf_reg->ch_send);
> +
> +       /*
> +        * Wait for Software Interface FSM state to be WFVLDCLR,
> +        * read the data and clear the valid flag.
> +        */
> +       ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
> +                                       data, GET_SWINF(data) == SWINF_WFVLDCLR,
> +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> +       if (ret < 0) {
> +               dev_err(&ctrl->dev, "failed to wait for SWINF_WFVLDCLR\n");
> +               goto out;
> +       }
> +
> +       data = pmif_readl(arb, inf_reg->rdata);
> +       memcpy(buf, &data, len);
> +       pmif_writel(arb, 1, inf_reg->ch_rdy);
> +
> +out:
> +       if (ret < 0)
> +               return ret;
> +
> +       return 0;
> +}
> +
> +static int pmif_spmi_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> +                              u16 addr, const u8 *buf, size_t len)
> +{
> +       struct pmif *arb = spmi_controller_get_drvdata(ctrl);
> +       struct ch_reg *inf_reg;
> +       int ret;
> +       u32 data, cmd;
> +
> +       if (len > 4) {
> +               dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);

Missing newline

> +               return -EINVAL;
> +       }
> +
> +       /* Check the opcode */
> +       if (opc >= 0x40 && opc <= 0x5F)
> +               opc = PMIF_CMD_REG;
> +       else if ((opc <= 0xF) || (opc >= 0x30 && opc <= 0x37))
> +               opc = PMIF_CMD_EXT_REG_LONG;
> +       else if (opc >= 0x80)
> +               opc = PMIF_CMD_REG_0;
> +       else
> +               return -EINVAL;
> +
> +       /* Wait for Software Interface FSM state to be IDLE. */
> +       inf_reg = &arb->chan;
> +       ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
> +                                       data, GET_SWINF(data) == SWINF_IDLE,
> +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> +       if (ret < 0) {
> +               /* set channel ready if the data has transferred */
> +               if (pmif_is_fsm_vldclr(arb))
> +                       pmif_writel(arb, 1, inf_reg->ch_rdy);
> +               dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
> +               goto out;
> +       }
> +
> +       /* Set the write data. */
> +       memcpy(&data, buf, len);
> +       pmif_writel(arb, data, inf_reg->wdata);
> +
> +       /* Send the command. */
> +       cmd = (opc << 30) | BIT(29) | (sid << 24) | ((len - 1) << 16) | addr;
> +       pmif_writel(arb, cmd, inf_reg->ch_send);
> +
> +out:
> +       if (ret < 0)
> +               return ret;
> +
> +       return 0;

Simplify to 

	out:
		return ret;

> +}
> +
> +static const struct pmif_data mt6873_pmif_arb = {
> +       .regs = mt6873_regs,
> +       .spmimst_regs = mt6873_spmi_regs,
> +       .soc_chan = 2,
> +};
> +
> +static int mtk_spmi_probe(struct platform_device *pdev)
> +{
> +       struct pmif *arb;
> +       struct spmi_controller *ctrl;
> +       int err, i;
> +       u32 chan_offset;
> +
> +       ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*arb));
> +       if (!ctrl)
> +               return -ENOMEM;
> +
> +       arb = spmi_controller_get_drvdata(ctrl);
> +       arb->data = of_device_get_match_data(&pdev->dev);

Use device_get_match_data() instead please.

> +       if (!arb->data) {
> +               err = -EINVAL;
> +               dev_err(&pdev->dev, "Cannot get drv_data\n");
> +               goto err_put_ctrl;
> +       }
> +
> +       arb->base = devm_platform_ioremap_resource_byname(pdev, "pmif");
> +       if (IS_ERR(arb->base)) {
> +               err = PTR_ERR(arb->base);
> +               dev_err(&pdev->dev, "pmif failed to get the remappped memory\n");

Please drop print as the API already prints errors for every problem.

> +               goto err_put_ctrl;
> +       }
> +
> +       arb->spmimst_base = devm_platform_ioremap_resource_byname(pdev, "spmimst");
> +       if (IS_ERR(arb->spmimst_base)) {
> +               err = PTR_ERR(arb->spmimst_base);
> +               dev_err(&pdev->dev, "spmimst failed to get the remappped memory\n");

Please drop print as the API already prints errors for every problem.

> +               goto err_put_ctrl;
> +       }
> +
> +       arb->nclks = ARRAY_SIZE(pmif_clock_names);
> +       if (arb->nclks > PMIF_MAX_CLKS) {
> +               err = -EINVAL;
> +               dev_err(&pdev->dev, "exceed the max clock numbers\n");

Do we really care? The dt schema should be checking this instead of the
driver.

> +               goto err_put_ctrl;
> +       }
> +
> +       for (i = 0; i < arb->nclks; i++)
> +               arb->clks[i].id = pmif_clock_names[i];
> +

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Re: [PATCH v10 3/5] spmi: mediatek: Add support for MT6873/8192

[Hsin-hsiung Wang]

Hi,

On Mon, 2021-08-09 at 10:55 -0700, Stephen Boyd wrote:
> Quoting Hsin-Hsiung Wang (2021-08-02 23:34:19)
> > diff --git a/drivers/spmi/spmi-mtk-pmif.c b/drivers/spmi/spmi-mtk-pmif.c
> > new file mode 100644
> > index 000000000000..94c45d46ab0c
> > --- /dev/null
> > +++ b/drivers/spmi/spmi-mtk-pmif.c
> > @@ -0,0 +1,465 @@
> > +// SPDX-License-Identifier: GPL-2.0
> > +//
> > +// Copyright (c) 2021 MediaTek Inc.
> > +
> > +#include <linux/clk.h>
> > +#include <linux/iopoll.h>
> > +#include <linux/module.h>
> > +#include <linux/of_device.h>
> 
> include platform_device.h for the platform device driver that this is.
> 
Thanks for the commit, I will update it in the next patch.

> > +#include <linux/spmi.h>
> > +
> > +#define SWINF_IDLE     0x00
> > +#define SWINF_WFVLDCLR 0x06
> > +
> > +#define GET_SWINF(x)   (((x) >> 1) & 0x7)
> > +
> > +#define PMIF_CMD_REG_0         0
> > +#define PMIF_CMD_REG           1
> > +#define PMIF_CMD_EXT_REG       2
> > +#define PMIF_CMD_EXT_REG_LONG  3
> > +
> > +#define PMIF_DELAY_US   10
> > +#define PMIF_TIMEOUT_US (10 * 1000)
> > +
> > +#define PMIF_CHAN_OFFSET 0x5
> > +
> > +#define PMIF_MAX_CLKS  3
> > +
> > +#define SPMI_OP_ST_BUSY 1
> > +
> > +struct ch_reg {
> > +       u32 ch_sta;
> > +       u32 wdata;
> > +       u32 rdata;
> > +       u32 ch_send;
> > +       u32 ch_rdy;
> > +};
> > +
> > +struct pmif_data {
> > +       const u32       *regs;
> > +       const u32       *spmimst_regs;
> > +       u32     soc_chan;
> > +};
> > +
> > +struct pmif {
> > +       void __iomem    *base;
> > +       void __iomem    *spmimst_base;
> > +       struct ch_reg   chan;
> > +       struct clk_bulk_data clks[PMIF_MAX_CLKS];
> > +       u32 nclks;
> 
> size_t? Surely 32-bits isn't important.
> 

Thanks. I will use size_t in the next patch.

> > +       const struct pmif_data *data;
> > +};
> > +
> > +static const char * const pmif_clock_names[] = {
> > +       "pmif_sys_ck", "pmif_tmr_ck", "spmimst_clk_mux",
> > +};
> [...]
> > +
> > +static bool pmif_is_fsm_vldclr(struct pmif *arb)
> > +{
> > +       u32 reg_rdata;
> > +
> > +       reg_rdata = pmif_readl(arb, arb->chan.ch_sta);
> 
> Newline here please.
> 

Thanks, I will update it in the next patch.

> > +       return GET_SWINF(reg_rdata) == SWINF_WFVLDCLR;
> > +}
> > +
> > +static int pmif_arb_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid)
> > +{
> > +       struct pmif *arb = spmi_controller_get_drvdata(ctrl);
> > +       u32 rdata, cmd;
> > +       int ret;
> > +
> > +       /* Check the opcode */
> > +       if (opc < SPMI_CMD_RESET || opc > SPMI_CMD_WAKEUP)
> > +               return -EINVAL;
> > +
> > +       cmd = opc - SPMI_CMD_RESET;
> > +
> > +       mtk_spmi_writel(arb, (cmd << 0x4) | sid, SPMI_OP_ST_CTRL);
> > +       ret = readl_poll_timeout_atomic(arb->spmimst_base + arb->data->spmimst_regs[SPMI_OP_ST_STA],
> > +                                       rdata, (rdata & SPMI_OP_ST_BUSY) == SPMI_OP_ST_BUSY,
> > +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> > +       if (ret < 0)
> > +               dev_err(&ctrl->dev, "timeout, err = %d\n", ret);
> > +
> > +       return ret;
> > +}
> > +
> > +static int pmif_spmi_read_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> > +                             u16 addr, u8 *buf, size_t len)
> > +{
> > +       struct pmif *arb = spmi_controller_get_drvdata(ctrl);
> > +       struct ch_reg *inf_reg;
> > +       int ret;
> > +       u32 data, cmd;
> > +
> > +       /* Check for argument validation. */
> > +       if (sid & ~0xf) {
> > +               dev_err(&ctrl->dev, "exceed the max slv id\n");
> > +               return -EINVAL;
> > +       }
> > +
> > +       if (len > 4) {
> > +               dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);
> 
> Missing newline
> 

Thanks, I will update it in the next patch.

> > +               return -EINVAL;
> > +       }
> > +
> > +       if (opc >= 0x60 && opc <= 0x7f)
> > +               opc = PMIF_CMD_REG;
> > +       else if ((opc >= 0x20 && opc <= 0x2f) || (opc >= 0x38 && opc <= 0x3f))
> > +               opc = PMIF_CMD_EXT_REG_LONG;
> > +       else
> > +               return -EINVAL;
> > +
> > +       /* Wait for Software Interface FSM state to be IDLE. */
> > +       inf_reg = &arb->chan;
> > +       ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
> > +                                       data, GET_SWINF(data) == SWINF_IDLE,
> > +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> > +       if (ret < 0) {
> > +               /* set channel ready if the data has transferred */
> > +               if (pmif_is_fsm_vldclr(arb))
> > +                       pmif_writel(arb, 1, inf_reg->ch_rdy);
> > +               dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
> > +               goto out;
> > +       }
> > +
> > +       /* Send the command. */
> > +       cmd = (opc << 30) | (sid << 24) | ((len - 1) << 16) | addr;
> > +       pmif_writel(arb, cmd, inf_reg->ch_send);
> > +
> > +       /*
> > +        * Wait for Software Interface FSM state to be WFVLDCLR,
> > +        * read the data and clear the valid flag.
> > +        */
> > +       ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
> > +                                       data, GET_SWINF(data) == SWINF_WFVLDCLR,
> > +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> > +       if (ret < 0) {
> > +               dev_err(&ctrl->dev, "failed to wait for SWINF_WFVLDCLR\n");
> > +               goto out;
> > +       }
> > +
> > +       data = pmif_readl(arb, inf_reg->rdata);
> > +       memcpy(buf, &data, len);
> > +       pmif_writel(arb, 1, inf_reg->ch_rdy);
> > +
> > +out:
> > +       if (ret < 0)
> > +               return ret;
> > +
> > +       return 0;
> > +}
> > +
> > +static int pmif_spmi_write_cmd(struct spmi_controller *ctrl, u8 opc, u8 sid,
> > +                              u16 addr, const u8 *buf, size_t len)
> > +{
> > +       struct pmif *arb = spmi_controller_get_drvdata(ctrl);
> > +       struct ch_reg *inf_reg;
> > +       int ret;
> > +       u32 data, cmd;
> > +
> > +       if (len > 4) {
> > +               dev_err(&ctrl->dev, "pmif supports 1..4 bytes per trans, but:%zu requested", len);
> 
> Missing newline
> 

Thanks, I will update it in the next patch.

> > +               return -EINVAL;
> > +       }
> > +
> > +       /* Check the opcode */
> > +       if (opc >= 0x40 && opc <= 0x5F)
> > +               opc = PMIF_CMD_REG;
> > +       else if ((opc <= 0xF) || (opc >= 0x30 && opc <= 0x37))
> > +               opc = PMIF_CMD_EXT_REG_LONG;
> > +       else if (opc >= 0x80)
> > +               opc = PMIF_CMD_REG_0;
> > +       else
> > +               return -EINVAL;
> > +
> > +       /* Wait for Software Interface FSM state to be IDLE. */
> > +       inf_reg = &arb->chan;
> > +       ret = readl_poll_timeout_atomic(arb->base + arb->data->regs[inf_reg->ch_sta],
> > +                                       data, GET_SWINF(data) == SWINF_IDLE,
> > +                                       PMIF_DELAY_US, PMIF_TIMEOUT_US);
> > +       if (ret < 0) {
> > +               /* set channel ready if the data has transferred */
> > +               if (pmif_is_fsm_vldclr(arb))
> > +                       pmif_writel(arb, 1, inf_reg->ch_rdy);
> > +               dev_err(&ctrl->dev, "failed to wait for SWINF_IDLE\n");
> > +               goto out;
> > +       }
> > +
> > +       /* Set the write data. */
> > +       memcpy(&data, buf, len);
> > +       pmif_writel(arb, data, inf_reg->wdata);
> > +
> > +       /* Send the command. */
> > +       cmd = (opc << 30) | BIT(29) | (sid << 24) | ((len - 1) << 16) | addr;
> > +       pmif_writel(arb, cmd, inf_reg->ch_send);
> > +
> > +out:
> > +       if (ret < 0)
> > +               return ret;
> > +
> > +       return 0;
> 
> Simplify to 
> 
> 	out:
> 		return ret;
> 

Thanks, I will update it in the next patch.

> > +}
> > +
> > +static const struct pmif_data mt6873_pmif_arb = {
> > +       .regs = mt6873_regs,
> > +       .spmimst_regs = mt6873_spmi_regs,
> > +       .soc_chan = 2,
> > +};
> > +
> > +static int mtk_spmi_probe(struct platform_device *pdev)
> > +{
> > +       struct pmif *arb;
> > +       struct spmi_controller *ctrl;
> > +       int err, i;
> > +       u32 chan_offset;
> > +
> > +       ctrl = spmi_controller_alloc(&pdev->dev, sizeof(*arb));
> > +       if (!ctrl)
> > +               return -ENOMEM;
> > +
> > +       arb = spmi_controller_get_drvdata(ctrl);
> > +       arb->data = of_device_get_match_data(&pdev->dev);
> 
> Use device_get_match_data() instead please.
> 

Thanks, I will change to use device_get_match_data in the next patch.

> > +       if (!arb->data) {
> > +               err = -EINVAL;
> > +               dev_err(&pdev->dev, "Cannot get drv_data\n");
> > +               goto err_put_ctrl;
> > +       }
> > +
> > +       arb->base = devm_platform_ioremap_resource_byname(pdev, "pmif");
> > +       if (IS_ERR(arb->base)) {
> > +               err = PTR_ERR(arb->base);
> > +               dev_err(&pdev->dev, "pmif failed to get the remappped memory\n");
> 
> Please drop print as the API already prints errors for every problem.
> 

Thanks, I will update it in the next patch.

> > +               goto err_put_ctrl;
> > +       }
> > +
> > +       arb->spmimst_base = devm_platform_ioremap_resource_byname(pdev, "spmimst");
> > +       if (IS_ERR(arb->spmimst_base)) {
> > +               err = PTR_ERR(arb->spmimst_base);
> > +               dev_err(&pdev->dev, "spmimst failed to get the remappped memory\n");
> 
> Please drop print as the API already prints errors for every problem.
> 

Thanks, I will update it in the next patch.

> > +               goto err_put_ctrl;
> > +       }
> > +
> > +       arb->nclks = ARRAY_SIZE(pmif_clock_names);
> > +       if (arb->nclks > PMIF_MAX_CLKS) {
> > +               err = -EINVAL;
> > +               dev_err(&pdev->dev, "exceed the max clock numbers\n");
> 
> Do we really care? The dt schema should be checking this instead of the
> driver.
> 

Thanks, I will remove the check in the next patch.

> > +               goto err_put_ctrl;
> > +       }
> > +
> > +       for (i = 0; i < arb->nclks; i++)
> > +               arb->clks[i].id = pmif_clock_names[i];
> > +

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