[PATCH v2 0/5] Add mmc-support for mt7986

[PATCH v2 0/5] Add mmc-support for mt7986

[Frank Wunderlich]

From: Frank Wunderlich <frank-w@public-files.de>

I've noticed the mtk-sd binding needs a bit more work get into a more
clean state.

There are 2 properties missing that maybe need to be added later or
dropped from devicetrees:
drv-type (which is used in mt8183-kukui.dtsi and set to <2>)
and
r_smpl (used in mt7622-rfb1.dts and mt7622-bananapi-bpi-r64.dts, both
times set to <1>)

i don't know their function and boundaries and i do not find them in
driver. I guess they are added by accident, but before removing them i
want to fix the other problems.

Frank Wunderlich (2):
  arm64: dts: mediatek: mt2712e: swap last 2 clocks to match binding
  dt-bindings: mmc: mtk-sd: add mt7986

Nícolas F. R. A. Prado (1):
  dt-bindings: mmc: mtk-sd: Set clocks based on compatible

Sam Shih (2):
  dt-bindings: mmc: Add compatible for Mediatek MT7986
  mmc: mediatek: add support for MT7986 SoC

 .../devicetree/bindings/mmc/mtk-sd.yaml       | 140 ++++++++++++++----
 arch/arm64/boot/dts/mediatek/mt2712e.dtsi     |   6 +-
 drivers/mmc/host/mtk-sd.c                     |  14 ++
 3 files changed, 127 insertions(+), 33 deletions(-)

-- 
2.34.1

[PATCH v2 1/5] dt-bindings: mmc: Add compatible for Mediatek MT7986

[Frank Wunderlich]

From: Sam Shih <sam.shih@mediatek.com>

This commit adds dt-binding documentation of mmc for Mediatek MT7986 SoC
Platform.

Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
Acked-by: Rob Herring <robh@kernel.org>
---
 Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
index d8e1e2e9adf2..3cbf0208f1b4 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
@@ -23,6 +23,7 @@ properties:
           - mediatek,mt6795-mmc
           - mediatek,mt7620-mmc
           - mediatek,mt7622-mmc
+          - mediatek,mt7986-mmc
           - mediatek,mt8135-mmc
           - mediatek,mt8173-mmc
           - mediatek,mt8183-mmc
-- 
2.34.1

[PATCH v2 2/5] mmc: mediatek: add support for MT7986 SoC

[Frank Wunderlich]

From: Sam Shih <sam.shih@mediatek.com>

Adding mt7986 own characteristics and of_device_id to have support
of MT7986 SoC.

Signed-off-by: Sam Shih <sam.shih@mediatek.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
 drivers/mmc/host/mtk-sd.c | 14 ++++++++++++++
 1 file changed, 14 insertions(+)

diff --git a/drivers/mmc/host/mtk-sd.c b/drivers/mmc/host/mtk-sd.c
index df941438aef5..3f7f3a1e0df8 100644
--- a/drivers/mmc/host/mtk-sd.c
+++ b/drivers/mmc/host/mtk-sd.c
@@ -552,6 +552,19 @@ static const struct mtk_mmc_compatible mt7622_compat = {
 	.support_64g = false,
 };
 
+static const struct mtk_mmc_compatible mt7986_compat = {
+	.clk_div_bits = 12,
+	.recheck_sdio_irq = true,
+	.hs400_tune = false,
+	.pad_tune_reg = MSDC_PAD_TUNE0,
+	.async_fifo = true,
+	.data_tune = true,
+	.busy_check = true,
+	.stop_clk_fix = true,
+	.enhance_rx = true,
+	.support_64g = true,
+};
+
 static const struct mtk_mmc_compatible mt8135_compat = {
 	.clk_div_bits = 8,
 	.recheck_sdio_irq = true,
@@ -609,6 +622,7 @@ static const struct of_device_id msdc_of_ids[] = {
 	{ .compatible = "mediatek,mt6795-mmc", .data = &mt6795_compat},
 	{ .compatible = "mediatek,mt7620-mmc", .data = &mt7620_compat},
 	{ .compatible = "mediatek,mt7622-mmc", .data = &mt7622_compat},
+	{ .compatible = "mediatek,mt7986-mmc", .data = &mt7986_compat},
 	{ .compatible = "mediatek,mt8135-mmc", .data = &mt8135_compat},
 	{ .compatible = "mediatek,mt8173-mmc", .data = &mt8173_compat},
 	{ .compatible = "mediatek,mt8183-mmc", .data = &mt8183_compat},
-- 
2.34.1

[PATCH v2 3/5] dt-bindings: mmc: mtk-sd: Set clocks based on compatible

[Frank Wunderlich]

From: Nícolas F. R. A. Prado <nfraprado@collabora.com>

The binding was describing a single clock list for all platforms, but
that's not really suitable: mt2712 requires an extra 'bus_clk' on some
of its controllers, while mt8192 requires four different extra clocks.
The rest of the platforms can share the same 3 clocks, with the third
being optional as it's not present on all platforms.

Move the clock definitions inside if blocks that match on the
compatibles. In practice this gets rid of dtbs_check warnings on mt8192,
since the 'bus_clk' clock from mt2712 is no longer expected on this
platform.

Fixes: 59a23395d8aa ("dt-bindings: mmc: Add support for MT8192 SoC")
Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
 .../devicetree/bindings/mmc/mtk-sd.yaml       | 111 +++++++++++++-----
 1 file changed, 81 insertions(+), 30 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
index 3cbf0208f1b4..c7bcf0c3dd5d 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
@@ -10,9 +10,6 @@ maintainers:
   - Chaotian Jing <chaotian.jing@mediatek.com>
   - Wenbin Mei <wenbin.mei@mediatek.com>
 
-allOf:
-  - $ref: mmc-controller.yaml#
-
 properties:
   compatible:
     oneOf:
@@ -49,27 +46,11 @@ properties:
     description:
       Should contain phandle for the clock feeding the MMC controller.
     minItems: 2
-    items:
-      - description: source clock (required).
-      - description: HCLK which used for host (required).
-      - description: independent source clock gate (required for MT2712).
-      - description: bus clock used for internal register access (required for MT2712 MSDC0/3).
-      - description: msdc subsys clock gate (required for MT8192).
-      - description: peripheral bus clock gate (required for MT8192).
-      - description: AXI bus clock gate (required for MT8192).
-      - description: AHB bus clock gate (required for MT8192).
+    maxItems: 7
 
   clock-names:
     minItems: 2
-    items:
-      - const: source
-      - const: hclk
-      - const: source_cg
-      - const: bus_clk
-      - const: sys_cg
-      - const: pclk_cg
-      - const: axi_cg
-      - const: ahb_cg
+    maxItems: 7
 
   interrupts:
     description:
@@ -191,15 +172,85 @@ required:
   - vmmc-supply
   - vqmmc-supply
 
-if:
-  properties:
-    compatible:
-      contains:
-        const: mediatek,mt8183-mmc
-then:
-  properties:
-    reg:
-      minItems: 2
+allOf:
+  - $ref: mmc-controller.yaml#
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8183-mmc
+    then:
+      properties:
+        reg:
+          minItems: 2
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt8192-mmc
+    then:
+      properties:
+        clocks:
+          items:
+            - description: source clock
+            - description: HCLK which used for host
+            - description: independent source clock gate
+            - description: msdc subsys clock gate
+            - description: peripheral bus clock gate
+            - description: AXI bus clock gate
+            - description: AHB bus clock gate
+        clock-names:
+          items:
+            - const: source
+            - const: hclk
+            - const: source_cg
+            - const: sys_cg
+            - const: pclk_cg
+            - const: axi_cg
+            - const: ahb_cg
+  - if:
+      properties:
+        compatible:
+          contains:
+            const: mediatek,mt2712-mmc
+    then:
+      properties:
+        clocks:
+          minItems: 3
+          items:
+            - description: source clock
+            - description: HCLK which used for host
+            - description: independent source clock gate
+            - description: bus clock used for internal register access (required for MSDC0/3).
+        clock-names:
+          minItems: 3
+          items:
+            - const: source
+            - const: hclk
+            - const: source_cg
+            - const: bus_clk
+  - if:
+      not:
+        properties:
+          compatible:
+            contains:
+              enum:
+                - mediatek,mt2712-mmc
+                - mediatek,mt8192-mmc
+    then:
+      properties:
+        clocks:
+          minItems: 2
+          items:
+            - description: source clock
+            - description: HCLK which used for host
+            - description: independent source clock gate
+        clock-names:
+          minItems: 2
+          items:
+            - const: source
+            - const: hclk
+            - const: source_cg
 
 unevaluatedProperties: false
 
-- 
2.34.1

Re: [PATCH v2 3/5] dt-bindings: mmc: mtk-sd: Set clocks based on compatible

[Krzysztof Kozlowski]

On 22/10/2022 05:05, Frank Wunderlich wrote:
> From: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> 
> The binding was describing a single clock list for all platforms, but
> that's not really suitable: mt2712 requires an extra 'bus_clk' on some
> of its controllers, while mt8192 requires four different extra clocks.
> The rest of the platforms can share the same 3 clocks, with the third
> being optional as it's not present on all platforms.

It was also wrong...

> 
> Move the clock definitions inside if blocks that match on the
> compatibles. In practice this gets rid of dtbs_check warnings on mt8192,
> since the 'bus_clk' clock from mt2712 is no longer expected on this
> platform.
> 
> Fixes: 59a23395d8aa ("dt-bindings: mmc: Add support for MT8192 SoC")
> Signed-off-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
>  .../devicetree/bindings/mmc/mtk-sd.yaml       | 111 +++++++++++++-----
>  1 file changed, 81 insertions(+), 30 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> index 3cbf0208f1b4..c7bcf0c3dd5d 100644
> --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> @@ -10,9 +10,6 @@ maintainers:
>    - Chaotian Jing <chaotian.jing@mediatek.com>
>    - Wenbin Mei <wenbin.mei@mediatek.com>
>  
> -allOf:
> -  - $ref: mmc-controller.yaml#
> -
>  properties:
>    compatible:
>      oneOf:
> @@ -49,27 +46,11 @@ properties:
>      description:
>        Should contain phandle for the clock feeding the MMC controller.
>      minItems: 2
> -    items:
> -      - description: source clock (required).
> -      - description: HCLK which used for host (required).
> -      - description: independent source clock gate (required for MT2712).
> -      - description: bus clock used for internal register access (required for MT2712 MSDC0/3).
> -      - description: msdc subsys clock gate (required for MT8192).
> -      - description: peripheral bus clock gate (required for MT8192).
> -      - description: AXI bus clock gate (required for MT8192).
> -      - description: AHB bus clock gate (required for MT8192).
> +    maxItems: 7

Confusing to see 8 clocks replaced by 7, but I guess this is problem of
old bindings.
>  
>    clock-names:
>      minItems: 2
> -    items:
> -      - const: source
> -      - const: hclk
> -      - const: source_cg
> -      - const: bus_clk
> -      - const: sys_cg
> -      - const: pclk_cg
> -      - const: axi_cg
> -      - const: ahb_cg
> +    maxItems: 7
>  
>    interrupts:
>      description:
> @@ -191,15 +172,85 @@ required:
>    - vmmc-supply
>    - vqmmc-supply
>  
> -if:
> -  properties:
> -    compatible:
> -      contains:
> -        const: mediatek,mt8183-mmc
> -then:
> -  properties:
> -    reg:
> -      minItems: 2
> +allOf:
> +  - $ref: mmc-controller.yaml#
> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: mediatek,mt8183-mmc
> +    then:
> +      properties:
> +        reg:
> +          minItems: 2

Blank line

> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: mediatek,mt8192-mmc
> +    then:
> +      properties:
> +        clocks:
> +          items:
> +            - description: source clock
> +            - description: HCLK which used for host
> +            - description: independent source clock gate
> +            - description: msdc subsys clock gate
> +            - description: peripheral bus clock gate
> +            - description: AXI bus clock gate
> +            - description: AHB bus clock gate
> +        clock-names:
> +          items:
> +            - const: source
> +            - const: hclk
> +            - const: source_cg
> +            - const: sys_cg
> +            - const: pclk_cg
> +            - const: axi_cg
> +            - const: ahb_cg

Blank line

> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            const: mediatek,mt2712-mmc
> +    then:
> +      properties:
> +        clocks:
> +          minItems: 3
> +          items:
> +            - description: source clock
> +            - description: HCLK which used for host
> +            - description: independent source clock gate
> +            - description: bus clock used for internal register access (required for MSDC0/3).
> +        clock-names:
> +          minItems: 3
> +          items:
> +            - const: source
> +            - const: hclk
> +            - const: source_cg
> +            - const: bus_clk

Blank line

> +  - if:
> +      not:

Can you not use negation, but list applicable compatibles? It would be
easier to read, I think

> +        properties:
> +          compatible:
> +            contains:
> +              enum:
> +                - mediatek,mt2712-mmc
> +                - mediatek,mt8192-mmc
Best regards,
Krzysztof

[PATCH v2 4/5] arm64: dts: mediatek: mt2712e: swap last 2 clocks to match binding

[Frank Wunderlich]

From: Frank Wunderlich <frank-w@public-files.de>

First 3 clocks for mt2712 need to be "source", "hclk", "source_cg"
so swap last 2 of mmc0 to match the binding.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
 arch/arm64/boot/dts/mediatek/mt2712e.dtsi | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
index e6d7453e56e0..9dc0794fcd2e 100644
--- a/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
+++ b/arch/arm64/boot/dts/mediatek/mt2712e.dtsi
@@ -766,9 +766,9 @@ mmc0: mmc@11230000 {
 		interrupts = <GIC_SPI 79 IRQ_TYPE_LEVEL_LOW>;
 		clocks = <&pericfg CLK_PERI_MSDC30_0>,
 			 <&pericfg CLK_PERI_MSDC50_0_HCLK_EN>,
-			 <&pericfg CLK_PERI_MSDC30_0_QTR_EN>,
-			 <&pericfg CLK_PERI_MSDC50_0_EN>;
-		clock-names = "source", "hclk", "bus_clk", "source_cg";
+			 <&pericfg CLK_PERI_MSDC50_0_EN>,
+			 <&pericfg CLK_PERI_MSDC30_0_QTR_EN>;
+		clock-names = "source", "hclk", "source_cg", "bus_clk";
 		status = "disabled";
 	};
 
-- 
2.34.1

[PATCH v2 5/5] dt-bindings: mmc: mtk-sd: add mt7986

[Frank Wunderlich]

From: Frank Wunderlich <frank-w@public-files.de>

Add SoC specific section for defining clock configuration.

Add compatible in "not" section to avoid override the settings again.

Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
---
 .../devicetree/bindings/mmc/mtk-sd.yaml       | 28 +++++++++++++++++++
 1 file changed, 28 insertions(+)

diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
index c7bcf0c3dd5d..9df63c461f1f 100644
--- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
+++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
@@ -229,6 +229,33 @@ allOf:
             - const: hclk
             - const: source_cg
             - const: bus_clk
+  - if:
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt7986-mmc
+    then:
+      properties:
+        assigned-clock-parents:
+          maxItems: 2
+        assigned-clocks:
+          maxItems: 2
+        clocks:
+          minItems: 3
+          items:
+            - description: source clock
+            - description: HCLK which used for host
+            - description: independent source clock gate
+            - description: bus clock used for internal register access
+            - description: msdc subsys clock gate
+        clock-names:
+          minItems: 3
+          items:
+            - const: source
+            - const: hclk
+            - const: axi_cg
+            - const: ahb_cg
   - if:
       not:
         properties:
@@ -237,6 +264,7 @@ allOf:
               enum:
                 - mediatek,mt2712-mmc
                 - mediatek,mt8192-mmc
+                - mediatek,mt7986-mmc
     then:
       properties:
         clocks:
-- 
2.34.1

Re: [PATCH v2 5/5] dt-bindings: mmc: mtk-sd: add mt7986

[Krzysztof Kozlowski]

On 22/10/2022 05:05, Frank Wunderlich wrote:
> From: Frank Wunderlich <frank-w@public-files.de>
> 
> Add SoC specific section for defining clock configuration.
> 
> Add compatible in "not" section to avoid override the settings again.
> 
> Signed-off-by: Frank Wunderlich <frank-w@public-files.de>
> ---
>  .../devicetree/bindings/mmc/mtk-sd.yaml       | 28 +++++++++++++++++++
>  1 file changed, 28 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> index c7bcf0c3dd5d..9df63c461f1f 100644
> --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml
> @@ -229,6 +229,33 @@ allOf:
>              - const: hclk
>              - const: source_cg
>              - const: bus_clk

Blank line

> +  - if:
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt7986-mmc
> +    then:
> +      properties:
> +        assigned-clock-parents:
> +          maxItems: 2
> +        assigned-clocks:
> +          maxItems: 2

Define these two only if they are required for the hardware to operate
and only such setup (two assigned parents) is allowed. Otherwise you put
some constraints on board design.

> +        clocks:
> +          minItems: 3

Best regards,
Krzysztof