[PATCH v5 0/5] Mediatek MT8195 SCP support

[PATCH v5 0/5] Mediatek MT8195 SCP support

[Tinghan Shen]

Changes since v4:
- Move clock acquirement to mtk_scp_of_data
- Add new vendor-prefix for Mediatek SCP
- Refine mtk,scp.yaml
  - Remove '|' in 'description'
  - Add 'items' to replace 'description' in reg-names property
  - Add 'const' to replace 'description' in clock-names property
  - Add optional required property for mt8183 and mt8192
  - Rewrite 'patternProperties' by 'additionalProperties'
  - Rewrite example with 1 address and size-cell.
  - Drop dts label from example 

Changes since v3:
- Add missing patch version in mail subject
- No change to patches.

Changes since v2:
- Add compatible for mt8192
- Convert mtk,scp.txt to mtk,scp.yaml 
- Refine clock checking method

Changes since v1:
- Fix missing 'compatible' line in binding document

Tinghan Shen (5):
  dt-bindings: remoteproc: mediatek: Add binding for mt8195 scp
  dt-bindings: remoteproc: mediatek: Add binding for mt8192 scp
  dt-bindings: vendor-prefixes: Add another prefix for Mediatek Co.
  dt-bindings: remoteproc: mediatek: Convert mtk,scp to json-schema
  remoteproc: mediatek: Support mt8195 scp

 .../bindings/remoteproc/mtk,scp.txt           | 36 --------
 .../bindings/remoteproc/mtk,scp.yaml          | 92 +++++++++++++++++++
 .../devicetree/bindings/vendor-prefixes.yaml  |  2 +
 drivers/remoteproc/mtk_common.h               |  1 +
 drivers/remoteproc/mtk_scp.c                  | 48 +++++++++-
 5 files changed, 138 insertions(+), 41 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
 create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml

-- 
2.18.0

[PATCH v5 1/5] dt-bindings: remoteproc: mediatek: Add binding for mt8195 scp

[Tinghan Shen]

Add mt8195 compatible to binding document. The description of required
properties are also modified to reflect the hardware change between
mt8183 and mt8195. The mt8195 doesn't have to control the scp clock on
kernel side.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
---
 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
index 3f5f78764b60..d64466eefbe3 100644
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
@@ -5,13 +5,15 @@ This binding provides support for ARM Cortex M4 Co-processor found on some
 Mediatek SoCs.
 
 Required properties:
-- compatible		Should be "mediatek,mt8183-scp"
+- compatible		Should be one of:
+				"mediatek,mt8183-scp"
+				"mediatek,mt8195-scp"
 - reg			Should contain the address ranges for memory regions:
 			SRAM, CFG, and L1TCM.
 - reg-names		Contains the corresponding names for the memory regions:
 			"sram", "cfg", and "l1tcm".
-- clocks		Clock for co-processor (See: ../clock/clock-bindings.txt)
-- clock-names		Contains the corresponding name for the clock. This
+- clocks		Required by mt8183. Clock for co-processor (See: ../clock/clock-bindings.txt)
+- clock-names		Required by mt8183. Contains the corresponding name for the clock. This
 			should be named "main".
 
 Subnodes
-- 
2.18.0

[PATCH v5 2/5] dt-bindings: remoteproc: mediatek: Add binding for mt8192 scp

[Tinghan Shen]

Add mt8192 compatible to binding document.

Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
---
 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
index d64466eefbe3..88f37dee7bca 100644
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
@@ -7,14 +7,17 @@ Mediatek SoCs.
 Required properties:
 - compatible		Should be one of:
 				"mediatek,mt8183-scp"
+				"mediatek,mt8192-scp"
 				"mediatek,mt8195-scp"
 - reg			Should contain the address ranges for memory regions:
 			SRAM, CFG, and L1TCM.
 - reg-names		Contains the corresponding names for the memory regions:
 			"sram", "cfg", and "l1tcm".
-- clocks		Required by mt8183. Clock for co-processor (See: ../clock/clock-bindings.txt)
-- clock-names		Required by mt8183. Contains the corresponding name for the clock. This
-			should be named "main".
+- clocks		Required by mt8183 and mt8192. Clock for co-processor
+			(See: ../clock/clock-bindings.txt)
+- clock-names		Required by mt8183 and mt8192. Contains the
+			corresponding name for the clock. This should be
+			named "main".
 
 Subnodes
 --------
-- 
2.18.0

[PATCH v5 3/5] dt-bindings: vendor-prefixes: Add another prefix for Mediatek Co.

[Tinghan Shen]

Add document binding for mediatek.

Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
---
 Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
index 07fb0d25fc15..c4252cd570b0 100644
--- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
+++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
@@ -760,6 +760,8 @@ patternProperties:
     description: MStar Semiconductor, Inc. (acquired by MediaTek Inc.)
   "^mti,.*":
     description: Imagination Technologies Ltd. (formerly MIPS Technologies Inc.)
+  "^mtk,.*":
+    description: MediaTek Inc.
   "^multi-inno,.*":
     description: Multi-Inno Technology Co.,Ltd
   "^mundoreader,.*":
-- 
2.18.0

[PATCH v5 4/5] dt-bindings: remoteproc: mediatek: Convert mtk,scp to json-schema

[Tinghan Shen]

Convert the mtk,scp binding to DT schema format using json-schema.

Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
---
 .../bindings/remoteproc/mtk,scp.txt           | 41 ---------
 .../bindings/remoteproc/mtk,scp.yaml          | 92 +++++++++++++++++++
 2 files changed, 92 insertions(+), 41 deletions(-)
 delete mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
 create mode 100644 Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml

diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt b/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
deleted file mode 100644
index 88f37dee7bca..000000000000
--- a/Documentation/devicetree/bindings/remoteproc/mtk,scp.txt
+++ /dev/null
@@ -1,41 +0,0 @@
-Mediatek SCP Bindings
-----------------------------------------
-
-This binding provides support for ARM Cortex M4 Co-processor found on some
-Mediatek SoCs.
-
-Required properties:
-- compatible		Should be one of:
-				"mediatek,mt8183-scp"
-				"mediatek,mt8192-scp"
-				"mediatek,mt8195-scp"
-- reg			Should contain the address ranges for memory regions:
-			SRAM, CFG, and L1TCM.
-- reg-names		Contains the corresponding names for the memory regions:
-			"sram", "cfg", and "l1tcm".
-- clocks		Required by mt8183 and mt8192. Clock for co-processor
-			(See: ../clock/clock-bindings.txt)
-- clock-names		Required by mt8183 and mt8192. Contains the
-			corresponding name for the clock. This should be
-			named "main".
-
-Subnodes
---------
-
-Subnodes of the SCP represent rpmsg devices. The names of the devices are not
-important. The properties of these nodes are defined by the individual bindings
-for the rpmsg devices - but must contain the following property:
-
-- mtk,rpmsg-name	Contains the name for the rpmsg device. Used to match
-			the subnode to rpmsg device announced by SCP.
-
-Example:
-
-	scp: scp@10500000 {
-		compatible = "mediatek,mt8183-scp";
-		reg = <0 0x10500000 0 0x80000>,
-		      <0 0x105c0000 0 0x5000>;
-		reg-names = "sram", "cfg";
-		clocks = <&infracfg CLK_INFRA_SCPSYS>;
-		clock-names = "main";
-	};
diff --git a/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
new file mode 100644
index 000000000000..f57f1518fe13
--- /dev/null
+++ b/Documentation/devicetree/bindings/remoteproc/mtk,scp.yaml
@@ -0,0 +1,92 @@
+# SPDX-License-Identifier: (GPL-2.0 OR BSD-2-Clause)
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/remoteproc/mtk,scp.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: Mediatek SCP Bindings
+
+maintainers:
+  - Tinghan Shen <tinghan.shen@mediatek.com>
+
+description:
+  This binding provides support for ARM Cortex M4 Co-processor found on some
+  Mediatek SoCs.
+
+properties:
+  compatible:
+    enum:
+      - mediatek,mt8183-scp
+      - mediatek,mt8192-scp
+      - mediatek,mt8195-scp
+
+  reg:
+    description:
+      Should contain the address ranges for memory regions SRAM, CFG, and
+      L1TCM.
+    maxItems: 3
+
+  reg-names:
+    items:
+      - const: sram
+      - const: cfg
+      - const: l1tcm
+
+  clocks:
+    description:
+      Clock for co-processor (see ../clock/clock-bindings.txt).
+      Required by mt8183 and mt8192.
+    maxItems: 1
+
+  clock-names:
+    const: main
+
+required:
+  - compatible
+  - reg
+  - reg-names
+
+if:
+  properties:
+    compatible:
+      enum:
+        - mediatek,mt8183-scp
+        - mediatek,mt8192-scp
+then:
+  required:
+    - clocks
+    - clock-names
+
+additionalProperties:
+  type: object
+  description:
+    Subnodes of the SCP represent rpmsg devices. The names of the devices
+    are not important. The properties of these nodes are defined by the
+    individual bindings for the rpmsg devices.
+  properties:
+    mtk,rpmsg-name:
+      $ref: /schemas/types.yaml#/definitions/string-array
+      description:
+        Contains the name for the rpmsg device. Used to match
+        the subnode to rpmsg device announced by SCP.
+
+  required:
+    - mtk,rpmsg-name
+
+examples:
+  - |
+    #include <dt-bindings/clock/mt8183-clk.h>
+
+    scp@10500000 {
+        compatible = "mediatek,mt8183-scp";
+        reg = <0x10500000 0x80000>,
+              <0x10700000 0x8000>,
+              <0x10720000 0xe0000>;
+        reg-names = "sram", "cfg", "l1tcm";
+        clocks = <&infracfg CLK_INFRA_SCPSYS>;
+        clock-names = "main";
+
+        cros_ec {
+            mtk,rpmsg-name = "cros-ec-rpmsg";
+        };
+    };
-- 
2.18.0

[PATCH v5 5/5] remoteproc: mediatek: Support mt8195 scp

[Tinghan Shen]

The SCP clock design is changed on mt8195 that doesn't need to control
SCP clock on kernel side.

Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
---
 drivers/remoteproc/mtk_common.h |  1 +
 drivers/remoteproc/mtk_scp.c    | 48 +++++++++++++++++++++++++++++----
 2 files changed, 44 insertions(+), 5 deletions(-)

diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
index 61901f5efa05..5ff3867c72f3 100644
--- a/drivers/remoteproc/mtk_common.h
+++ b/drivers/remoteproc/mtk_common.h
@@ -72,6 +72,7 @@ struct scp_ipi_desc {
 struct mtk_scp;
 
 struct mtk_scp_of_data {
+	int (*scp_clk_get)(struct mtk_scp *scp);
 	int (*scp_before_load)(struct mtk_scp *scp);
 	void (*scp_irq_handler)(struct mtk_scp *scp);
 	void (*scp_reset_assert)(struct mtk_scp *scp);
diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
index 9679cc26895e..36e48cf58ed6 100644
--- a/drivers/remoteproc/mtk_scp.c
+++ b/drivers/remoteproc/mtk_scp.c
@@ -312,6 +312,32 @@ static int scp_elf_read_ipi_buf_addr(struct mtk_scp *scp,
 	return -ENOENT;
 }
 
+static int mt8183_scp_clk_get(struct mtk_scp *scp)
+{
+	struct device *dev = scp->dev;
+	int ret = 0;
+
+	scp->clk = devm_clk_get(dev, "main");
+	if (IS_ERR(scp->clk)) {
+		dev_err(dev, "Failed to get clock\n");
+		ret = PTR_ERR(scp->clk);
+	}
+
+	return ret;
+}
+
+static int mt8192_scp_clk_get(struct mtk_scp *scp)
+{
+	return mt8183_scp_clk_get(scp);
+}
+
+static int mt8195_scp_clk_get(struct mtk_scp *scp)
+{
+	scp->clk = NULL;
+
+	return 0;
+}
+
 static int mt8183_scp_before_load(struct mtk_scp *scp)
 {
 	/* Clear SCP to host interrupt */
@@ -785,12 +811,9 @@ static int scp_probe(struct platform_device *pdev)
 	if (ret)
 		goto destroy_mutex;
 
-	scp->clk = devm_clk_get(dev, "main");
-	if (IS_ERR(scp->clk)) {
-		dev_err(dev, "Failed to get clock\n");
-		ret = PTR_ERR(scp->clk);
+	ret = scp->data->scp_clk_get(scp);
+	if (ret)
 		goto release_dev_mem;
-	}
 
 	/* register SCP initialization IPI */
 	ret = scp_ipi_register(scp, SCP_IPI_INIT, scp_init_ipi_handler, scp);
@@ -852,6 +875,7 @@ static int scp_remove(struct platform_device *pdev)
 }
 
 static const struct mtk_scp_of_data mt8183_of_data = {
+	.scp_clk_get = mt8183_scp_clk_get,
 	.scp_before_load = mt8183_scp_before_load,
 	.scp_irq_handler = mt8183_scp_irq_handler,
 	.scp_reset_assert = mt8183_scp_reset_assert,
@@ -864,6 +888,19 @@ static const struct mtk_scp_of_data mt8183_of_data = {
 };
 
 static const struct mtk_scp_of_data mt8192_of_data = {
+	.scp_clk_get = mt8192_scp_clk_get,
+	.scp_before_load = mt8192_scp_before_load,
+	.scp_irq_handler = mt8192_scp_irq_handler,
+	.scp_reset_assert = mt8192_scp_reset_assert,
+	.scp_reset_deassert = mt8192_scp_reset_deassert,
+	.scp_stop = mt8192_scp_stop,
+	.scp_da_to_va = mt8192_scp_da_to_va,
+	.host_to_scp_reg = MT8192_GIPC_IN_SET,
+	.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
+};
+
+static const struct mtk_scp_of_data mt8195_of_data = {
+	.scp_clk_get = mt8195_scp_clk_get,
 	.scp_before_load = mt8192_scp_before_load,
 	.scp_irq_handler = mt8192_scp_irq_handler,
 	.scp_reset_assert = mt8192_scp_reset_assert,
@@ -877,6 +914,7 @@ static const struct mtk_scp_of_data mt8192_of_data = {
 static const struct of_device_id mtk_scp_of_match[] = {
 	{ .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data },
 	{ .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data },
+	{ .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data },
 	{},
 };
 MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
-- 
2.18.0

Re: [PATCH v5 3/5] dt-bindings: vendor-prefixes: Add another prefix for Mediatek Co.

[Krzysztof Kozlowski]

On 03/08/2021 09:59, Tinghan Shen wrote:
> Add document binding for mediatek.
> 
> Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
> ---
>  Documentation/devicetree/bindings/vendor-prefixes.yaml | 2 ++
>  1 file changed, 2 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/vendor-prefixes.yaml b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> index 07fb0d25fc15..c4252cd570b0 100644
> --- a/Documentation/devicetree/bindings/vendor-prefixes.yaml
> +++ b/Documentation/devicetree/bindings/vendor-prefixes.yaml
> @@ -760,6 +760,8 @@ patternProperties:
>      description: MStar Semiconductor, Inc. (acquired by MediaTek Inc.)
>    "^mti,.*":
>      description: Imagination Technologies Ltd. (formerly MIPS Technologies Inc.)
> +  "^mtk,.*":
> +    description: MediaTek Inc.

NAK, you already have one MediaTek Inc. I doubt these are different
companies...


Best regards,
Krzysztof

Re: [PATCH v5 5/5] remoteproc: mediatek: Support mt8195 scp

[Mathieu Poirier]

On Tue, Aug 03, 2021 at 03:59:22PM +0800, Tinghan Shen wrote:
> The SCP clock design is changed on mt8195 that doesn't need to control
> SCP clock on kernel side.
> 
> Signed-off-by: Tinghan Shen <tinghan.shen@mediatek.com>
> ---
>  drivers/remoteproc/mtk_common.h |  1 +
>  drivers/remoteproc/mtk_scp.c    | 48 +++++++++++++++++++++++++++++----
>  2 files changed, 44 insertions(+), 5 deletions(-)
>

Reviewed-by: Mathieu Poirier <mathieu.poirier@linaro.org>

> diff --git a/drivers/remoteproc/mtk_common.h b/drivers/remoteproc/mtk_common.h
> index 61901f5efa05..5ff3867c72f3 100644
> --- a/drivers/remoteproc/mtk_common.h
> +++ b/drivers/remoteproc/mtk_common.h
> @@ -72,6 +72,7 @@ struct scp_ipi_desc {
>  struct mtk_scp;
>  
>  struct mtk_scp_of_data {
> +	int (*scp_clk_get)(struct mtk_scp *scp);
>  	int (*scp_before_load)(struct mtk_scp *scp);
>  	void (*scp_irq_handler)(struct mtk_scp *scp);
>  	void (*scp_reset_assert)(struct mtk_scp *scp);
> diff --git a/drivers/remoteproc/mtk_scp.c b/drivers/remoteproc/mtk_scp.c
> index 9679cc26895e..36e48cf58ed6 100644
> --- a/drivers/remoteproc/mtk_scp.c
> +++ b/drivers/remoteproc/mtk_scp.c
> @@ -312,6 +312,32 @@ static int scp_elf_read_ipi_buf_addr(struct mtk_scp *scp,
>  	return -ENOENT;
>  }
>  
> +static int mt8183_scp_clk_get(struct mtk_scp *scp)
> +{
> +	struct device *dev = scp->dev;
> +	int ret = 0;
> +
> +	scp->clk = devm_clk_get(dev, "main");
> +	if (IS_ERR(scp->clk)) {
> +		dev_err(dev, "Failed to get clock\n");
> +		ret = PTR_ERR(scp->clk);
> +	}
> +
> +	return ret;
> +}
> +
> +static int mt8192_scp_clk_get(struct mtk_scp *scp)
> +{
> +	return mt8183_scp_clk_get(scp);
> +}
> +
> +static int mt8195_scp_clk_get(struct mtk_scp *scp)
> +{
> +	scp->clk = NULL;
> +
> +	return 0;
> +}
> +
>  static int mt8183_scp_before_load(struct mtk_scp *scp)
>  {
>  	/* Clear SCP to host interrupt */
> @@ -785,12 +811,9 @@ static int scp_probe(struct platform_device *pdev)
>  	if (ret)
>  		goto destroy_mutex;
>  
> -	scp->clk = devm_clk_get(dev, "main");
> -	if (IS_ERR(scp->clk)) {
> -		dev_err(dev, "Failed to get clock\n");
> -		ret = PTR_ERR(scp->clk);
> +	ret = scp->data->scp_clk_get(scp);
> +	if (ret)
>  		goto release_dev_mem;
> -	}
>  
>  	/* register SCP initialization IPI */
>  	ret = scp_ipi_register(scp, SCP_IPI_INIT, scp_init_ipi_handler, scp);
> @@ -852,6 +875,7 @@ static int scp_remove(struct platform_device *pdev)
>  }
>  
>  static const struct mtk_scp_of_data mt8183_of_data = {
> +	.scp_clk_get = mt8183_scp_clk_get,
>  	.scp_before_load = mt8183_scp_before_load,
>  	.scp_irq_handler = mt8183_scp_irq_handler,
>  	.scp_reset_assert = mt8183_scp_reset_assert,
> @@ -864,6 +888,19 @@ static const struct mtk_scp_of_data mt8183_of_data = {
>  };
>  
>  static const struct mtk_scp_of_data mt8192_of_data = {
> +	.scp_clk_get = mt8192_scp_clk_get,
> +	.scp_before_load = mt8192_scp_before_load,
> +	.scp_irq_handler = mt8192_scp_irq_handler,
> +	.scp_reset_assert = mt8192_scp_reset_assert,
> +	.scp_reset_deassert = mt8192_scp_reset_deassert,
> +	.scp_stop = mt8192_scp_stop,
> +	.scp_da_to_va = mt8192_scp_da_to_va,
> +	.host_to_scp_reg = MT8192_GIPC_IN_SET,
> +	.host_to_scp_int_bit = MT8192_HOST_IPC_INT_BIT,
> +};
> +
> +static const struct mtk_scp_of_data mt8195_of_data = {
> +	.scp_clk_get = mt8195_scp_clk_get,
>  	.scp_before_load = mt8192_scp_before_load,
>  	.scp_irq_handler = mt8192_scp_irq_handler,
>  	.scp_reset_assert = mt8192_scp_reset_assert,
> @@ -877,6 +914,7 @@ static const struct mtk_scp_of_data mt8192_of_data = {
>  static const struct of_device_id mtk_scp_of_match[] = {
>  	{ .compatible = "mediatek,mt8183-scp", .data = &mt8183_of_data },
>  	{ .compatible = "mediatek,mt8192-scp", .data = &mt8192_of_data },
> +	{ .compatible = "mediatek,mt8195-scp", .data = &mt8195_of_data },
>  	{},
>  };
>  MODULE_DEVICE_TABLE(of, mtk_scp_of_match);
> -- 
> 2.18.0
>