[PATCH v2 0/3] Add larbid init routine for mediatek's gen1 smi larb driver

[PATCH v2 0/3] Add larbid init routine for mediatek's gen1 smi larb driver

[honghui.zhang at mediatek.com]

From: Honghui Zhang <honghui.zhang@mediatek.com>

Mediatek's gen1 smi need the hardware larbid to identify the offset for
the register which controls whether enable iommu for this larb.
In the commit 3c8f4ad85c4b ("memory/mediatek: add support for mt2701"),
the larbid was used without properly initialized. This patchset fixed
that.
This patchset was based on the v2 version of the patch:
memory: mtk-smi: Use of_device_get_match_data helper[1],
which was base on 4.13-rc1

[1] https://patchwork.kernel.org/patch/9864719

Change since v1:
 - Using mtk_smi_larb_gen to identify whether larbid was needed instead of
   checking hard code bindings.

Honghui Zhang (3):
  memory: mtk-smi: add larbid handle routine
  dt-bindings: mediatek: add descriptions for larbid
  arm: dts: mediatek: add larbid property for larb

 .../bindings/memory-controllers/mediatek,smi-larb.txt     | 15 +++++++++++++++
 arch/arm/boot/dts/mt2701.dtsi                             |  3 +++
 drivers/memory/mtk-smi.c                                  | 12 ++++++++++++
 3 files changed, 30 insertions(+)

-- 
2.6.4

[PATCH v2 1/3] memory: mtk-smi: add larbid handle routine

[honghui.zhang at mediatek.com]

From: Honghui Zhang <honghui.zhang@mediatek.com>

In the commit 3c8f4ad85c4b ("memory/mediatek: add support for mt2701"),
the larb->larbid was added but not initialized.
Mediatek's gen1 smi need this hardware larbid information to get the
register offset which controls whether enable iommu for this larb.
This patch add the initialize routine for larbid.

Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
---
 drivers/memory/mtk-smi.c | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 2b798bb4..8f75aaa 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -42,6 +42,7 @@
 #define SMI_SECUR_CON_VAL_DOMAIN(id)	(0x3 << ((((id) & 0x7) << 2) + 1))
 
 struct mtk_smi_larb_gen {
+	bool need_larbid;
 	int port_in_larb[MTK_LARB_NR_MAX + 1];
 	void (*config_port)(struct device *);
 };
@@ -214,6 +215,7 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8173 = {
 };
 
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = {
+	.need_larbid = true,
 	.port_in_larb = {
 		LARB0_PORT_OFFSET, LARB1_PORT_OFFSET,
 		LARB2_PORT_OFFSET, LARB3_PORT_OFFSET
@@ -240,6 +242,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct device_node *smi_node;
 	struct platform_device *smi_pdev;
+	int err;
 
 	if (!dev->pm_domain)
 		return -EPROBE_DEFER;
@@ -263,6 +266,15 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 		return PTR_ERR(larb->smi.clk_smi);
 	larb->smi.dev = dev;
 
+	if (larb->larb_gen->need_larbid) {
+		err = of_property_read_u32(dev->of_node, "mediatek,larbid",
+					   &larb->larbid);
+		if (err) {
+			dev_err(dev, "missing larbid property\n");
+			return err;
+		}
+	}
+
 	smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
 	if (!smi_node)
 		return -EINVAL;
-- 
2.6.4

[PATCH v2 1/3] memory: mtk-smi: add larbid handle routine

[Matthias Brugger]

On 07/28/2017 12:55 PM, honghui.zhang at mediatek.com wrote:
> From: Honghui Zhang <honghui.zhang@mediatek.com>
> 
> In the commit 3c8f4ad85c4b ("memory/mediatek: add support for mt2701"),
> the larb->larbid was added but not initialized.
> Mediatek's gen1 smi need this hardware larbid information to get the
> register offset which controls whether enable iommu for this larb.
> This patch add the initialize routine for larbid.
> 
> Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>

Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>

> ---
>   drivers/memory/mtk-smi.c | 12 ++++++++++++
>   1 file changed, 12 insertions(+)
> 
> diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
> index 2b798bb4..8f75aaa 100644
> --- a/drivers/memory/mtk-smi.c
> +++ b/drivers/memory/mtk-smi.c
> @@ -42,6 +42,7 @@
>   #define SMI_SECUR_CON_VAL_DOMAIN(id)	(0x3 << ((((id) & 0x7) << 2) + 1))
>   
>   struct mtk_smi_larb_gen {
> +	bool need_larbid;
>   	int port_in_larb[MTK_LARB_NR_MAX + 1];
>   	void (*config_port)(struct device *);
>   };
> @@ -214,6 +215,7 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8173 = {
>   };
>   
>   static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = {
> +	.need_larbid = true,
>   	.port_in_larb = {
>   		LARB0_PORT_OFFSET, LARB1_PORT_OFFSET,
>   		LARB2_PORT_OFFSET, LARB3_PORT_OFFSET
> @@ -240,6 +242,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
>   	struct device *dev = &pdev->dev;
>   	struct device_node *smi_node;
>   	struct platform_device *smi_pdev;
> +	int err;
>   
>   	if (!dev->pm_domain)
>   		return -EPROBE_DEFER;
> @@ -263,6 +266,15 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
>   		return PTR_ERR(larb->smi.clk_smi);
>   	larb->smi.dev = dev;
>   
> +	if (larb->larb_gen->need_larbid) {
> +		err = of_property_read_u32(dev->of_node, "mediatek,larbid",
> +					   &larb->larbid);
> +		if (err) {
> +			dev_err(dev, "missing larbid property\n");
> +			return err;
> +		}
> +	}
> +
>   	smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
>   	if (!smi_node)
>   		return -EINVAL;
> 

[PATCH v2 2/3] dt-bindings: mediatek: add descriptions for larbid

[honghui.zhang at mediatek.com]

From: Honghui Zhang <honghui.zhang@mediatek.com>

This patch add larbid descritptions for mediatek's gen1 smi larb hardware.

Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
---
 .../bindings/memory-controllers/mediatek,smi-larb.txt     | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
index 21277a5..d1b115c 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.txt
@@ -15,6 +15,9 @@ Required properties:
 	    the register.
   - "smi" : It's the clock for transfer data and command.
 
+Required property for mt2701:
+- mediatek,larbid :the hardware id of this larb.
+
 Example:
 	larb1: larb at 16010000 {
 		compatible = "mediatek,mt8173-smi-larb";
@@ -25,3 +28,15 @@ Example:
 			 <&vdecsys CLK_VDEC_LARB_CKEN>;
 		clock-names = "apb", "smi";
 	};
+
+Example for mt2701:
+	larb0: larb at 14010000 {
+		compatible = "mediatek,mt2701-smi-larb";
+		reg = <0 0x14010000 0 0x1000>;
+		mediatek,smi = <&smi_common>;
+		mediatek,larbid = <0>;
+		clocks = <&mmsys CLK_MM_SMI_LARB0>,
+			 <&mmsys CLK_MM_SMI_LARB0>;
+		clock-names = "apb", "smi";
+		power-domains = <&scpsys MT2701_POWER_DOMAIN_DISP>;
+	};
-- 
2.6.4

[PATCH v2 3/3] arm: dts: mediatek: add larbid property for larb

[honghui.zhang at mediatek.com]

From: Honghui Zhang <honghui.zhang@mediatek.com>

Add mediatek's hardware id information for smi larb.

Signed-off-by: Honghui Zhang <honghui.zhang@mediatek.com>
---
 arch/arm/boot/dts/mt2701.dtsi | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/arch/arm/boot/dts/mt2701.dtsi b/arch/arm/boot/dts/mt2701.dtsi
index f1efdc6..2cddbec 100644
--- a/arch/arm/boot/dts/mt2701.dtsi
+++ b/arch/arm/boot/dts/mt2701.dtsi
@@ -533,6 +533,7 @@
 		compatible = "mediatek,mt2701-smi-larb";
 		reg = <0 0x14010000 0 0x1000>;
 		mediatek,smi = <&smi_common>;
+		mediatek,larbid = <0>;
 		clocks = <&mmsys CLK_MM_SMI_LARB0>,
 			 <&mmsys CLK_MM_SMI_LARB0>;
 		clock-names = "apb", "smi";
@@ -549,6 +550,7 @@
 		compatible = "mediatek,mt2701-smi-larb";
 		reg = <0 0x15001000 0 0x1000>;
 		mediatek,smi = <&smi_common>;
+		mediatek,larbid = <2>;
 		clocks = <&imgsys CLK_IMG_SMI_COMM>,
 			 <&imgsys CLK_IMG_SMI_COMM>;
 		clock-names = "apb", "smi";
@@ -579,6 +581,7 @@
 		compatible = "mediatek,mt2701-smi-larb";
 		reg = <0 0x16010000 0 0x1000>;
 		mediatek,smi = <&smi_common>;
+		mediatek,larbid = <1>;
 		clocks = <&vdecsys CLK_VDEC_CKGEN>,
 			 <&vdecsys CLK_VDEC_LARB>;
 		clock-names = "apb", "smi";
-- 
2.6.4