[PATCH v3 00/13] MT8195 SMI support

[PATCH v3 00/13] MT8195 SMI support

[Yong Wu]

This patchset mainly adds SMI support for mt8195.

Comparing with the previous version, add two new functions:
a) add smi sub common
b) add initial setting for smi-common and smi-larb.

Change note:
v3:1) In the dt-binding:
       a. Change mediatek,smi type from phandle-array to phandle from Rob.
       b. Add a new bool property (mediatek,smi_sub_common)
          to indicate if this is smi-sub-common.
   2) Change the clock using bulk parting.
      keep the smi-common's has_gals flag. more strict.
   3) More comment about larb initial setting.
   4) Add a maintain patch
       
v2: https://lore.kernel.org/linux-mediatek/20210715121209.31024-1-yong.wu@mediatek.com/
    rebase on v5.14-rc1
    1) Adjust clk_bulk flow: use devm_clk_bulk_get for necessary clocks.
    2) Add two new little patches:
       a) use devm_platform_ioremap_resource
       b) Add error handle for smi_probe

v1: https://lore.kernel.org/linux-mediatek/20210616114346.18812-1-yong.wu@mediatek.com/

Yong Wu (13):
  dt-bindings: memory: mediatek: Add mt8195 smi binding
  dt-bindings: memory: mediatek: Add mt8195 smi sub common
  memory: mtk-smi: Use clk_bulk clock ops
  memory: mtk-smi: Rename smi_gen to smi_type
  memory: mtk-smi: Adjust some code position
  memory: mtk-smi: Add error handle for smi_probe
  memory: mtk-smi: Add device link for smi-sub-common
  memory: mtk-smi: Add clocks for smi-sub-common
  memory: mtk-smi: Use devm_platform_ioremap_resource
  memory: mtk-smi: mt8195: Add smi support
  memory: mtk-smi: mt8195: Add initial setting for smi-common
  memory: mtk-smi: mt8195: Add initial setting for smi-larb
  MAINTAINERS: Add entry for MediaTek SMI

 .../mediatek,smi-common.yaml                  |  36 +-
 .../memory-controllers/mediatek,smi-larb.yaml |   3 +
 MAINTAINERS                                   |   8 +
 drivers/memory/mtk-smi.c                      | 596 ++++++++++--------
 4 files changed, 395 insertions(+), 248 deletions(-)

-- 
2.18.0

[PATCH v3 01/13] dt-bindings: memory: mediatek: Add mt8195 smi binding

[Yong Wu]

Add mt8195 smi supporting in the bindings.

In mt8195, there are two smi-common HW, one is for vdo(video output),
the other is for vpp(video processing pipe). They connect with different
smi-larbs, then some setting(bus_sel) is different. Differentiate them
with the compatible string.

Something like this:

    IOMMU(VDO)          IOMMU(VPP)
       |                   |
 SMI_COMMON_VDO      SMI_COMMON_VPP
 ----------------     ----------------
  |      |   ...      |      |     ...
larb0 larb2  ...    larb1 larb3    ...

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
---
 .../bindings/memory-controllers/mediatek,smi-common.yaml    | 6 +++++-
 .../bindings/memory-controllers/mediatek,smi-larb.yaml      | 3 +++
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
index e87e4382807c..602592b6c3f5 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
@@ -16,7 +16,7 @@ description: |
   MediaTek SMI have two generations of HW architecture, here is the list
   which generation the SoCs use:
   generation 1: mt2701 and mt7623.
-  generation 2: mt2712, mt6779, mt8167, mt8173, mt8183 and mt8192.
+  generation 2: mt2712, mt6779, mt8167, mt8173, mt8183, mt8192 and mt8195.
 
   There's slight differences between the two SMI, for generation 2, the
   register which control the iommu port is at each larb's register base. But
@@ -36,6 +36,8 @@ properties:
           - mediatek,mt8173-smi-common
           - mediatek,mt8183-smi-common
           - mediatek,mt8192-smi-common
+          - mediatek,mt8195-smi-common-vdo
+          - mediatek,mt8195-smi-common-vpp
 
       - description: for mt7623
         items:
@@ -98,6 +100,8 @@ allOf:
             - mediatek,mt6779-smi-common
             - mediatek,mt8183-smi-common
             - mediatek,mt8192-smi-common
+            - mediatek,mt8195-smi-common-vdo
+            - mediatek,mt8195-smi-common-vpp
 
     then:
       properties:
diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
index 2353f6cf3c80..eaeff1ada7f8 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-larb.yaml
@@ -24,6 +24,7 @@ properties:
           - mediatek,mt8173-smi-larb
           - mediatek,mt8183-smi-larb
           - mediatek,mt8192-smi-larb
+          - mediatek,mt8195-smi-larb
 
       - description: for mt7623
         items:
@@ -74,6 +75,7 @@ allOf:
         compatible:
           enum:
             - mediatek,mt8183-smi-larb
+            - mediatek,mt8195-smi-larb
 
     then:
       properties:
@@ -108,6 +110,7 @@ allOf:
               - mediatek,mt6779-smi-larb
               - mediatek,mt8167-smi-larb
               - mediatek,mt8192-smi-larb
+              - mediatek,mt8195-smi-larb
 
     then:
       required:
-- 
2.18.0

[PATCH v3 02/13] dt-bindings: memory: mediatek: Add mt8195 smi sub common

[Yong Wu]

Add the binding for smi-sub-common. The SMI block diagram like this:

        IOMMU
         |  |
      smi-common
  ------------------
  |      ....      |
 larb0           larb7   <-max is 8

The smi-common connects with smi-larb and IOMMU. The maximum larbs number
that connects with a smi-common is 8. If the engines number is over 8,
sometimes we use a smi-sub-common which is nearly same with smi-common.
It supports up to 8 input and 1 output(smi-common has 2 output)

Something like:

        IOMMU
         |  |
      smi-common
  ---------------------
  |      |          ...
larb0  sub-common   ...   <-max is 8
      -----------
       |    |    ...   <-max is 8 too.
     larb2 larb5

We don't need extra SW setting for smi-sub-common, only the sub-common has
special clocks need to enable when the engines access dram.

If it is sub-common, it should have a "mediatek,smi" phandle to point to
its smi-common. meanwhile the sub-common only has one gals clock.

Additionally, add a new property "mediatek,smi_sub_common" for this
sub-common, this is needed in the IOMMU driver in which we create a device
link between smi-common and the IOMMU device. If we add the smi-sub-common
here, the IOMMU driver still need to find the smi-common device. thus,
add this bool property to indicate if it is sub-common.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
change note:
a. change mediatek, smi type from phandle-array to phandle from Rob.
b. Add a new bool property (mediatek,smi_sub_common) to indicate this is
   smi-sub-common. the reason is as above.
---
 .../mediatek,smi-common.yaml                  | 30 +++++++++++++++++++
 1 file changed, 30 insertions(+)

diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
index 602592b6c3f5..26bb9903864b 100644
--- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
+++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
@@ -38,6 +38,7 @@ properties:
           - mediatek,mt8192-smi-common
           - mediatek,mt8195-smi-common-vdo
           - mediatek,mt8195-smi-common-vpp
+          - mediatek,mt8195-smi-sub-common
 
       - description: for mt7623
         items:
@@ -67,6 +68,14 @@ properties:
     minItems: 2
     maxItems: 4
 
+  mediatek,smi:
+    $ref: /schemas/types.yaml#/definitions/phandle
+    description: a phandle to the smi-common node above. Only for sub-common.
+
+  mediatek,smi_sub_common:
+    type: boolean
+    description: Indicate if this is smi-sub-common.
+
 required:
   - compatible
   - reg
@@ -93,6 +102,27 @@ allOf:
             - const: smi
             - const: async
 
+  - if:  # only for sub common
+      properties:
+        compatible:
+          contains:
+            enum:
+              - mediatek,mt8195-smi-sub-common
+    then:
+      required:
+        - mediatek,smi
+        - mediatek,smi_sub_common
+      properties:
+        clock:
+          items:
+            minItems: 3
+            maxItems: 3
+        clock-names:
+          items:
+            - const: apb
+            - const: smi
+            - const: gals0
+
   - if:  # for gen2 HW that have gals
       properties:
         compatible:
-- 
2.18.0

[PATCH v3 03/13] memory: mtk-smi: Use clk_bulk clock ops

[Yong Wu]

Use clk_bulk interface instead of the orginal one to simplify the code.

For SMI larbs: Require apb/smi clocks while gals is optional.
For SMI common: Require apb/smi/gals0/gal1 in has_gals case. Otherwise,
                also only require apb/smi, No optional clk here.

About the "has_gals" flag, for smi larbs, the gals clock also may be
optional even this platform support it. thus it always use
*_bulk_get_optional, then the flag has_gals is unnecessary. Remove it.
The smi_common's has_gals still keep it.

Also remove clk fail logs since bulk interface already output fail log.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
change note:
still keep smi-common's has_glas flag. it is more strict.
But it did change many code, thus I didn't keep Ikjoon's R-b.
---
 drivers/memory/mtk-smi.c | 143 +++++++++++++++------------------------
 1 file changed, 55 insertions(+), 88 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index c5fb51f73b34..f91eaf5c3ab0 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -60,6 +60,20 @@ enum mtk_smi_gen {
 	MTK_SMI_GEN2
 };
 
+#define MTK_SMI_CLK_NR_MAX			4
+
+/* larbs: Require apb/smi clocks while gals is optional. */
+static const char * const mtk_smi_larb_clks[] = {"apb", "smi", "gals"};
+#define MTK_SMI_LARB_REQ_CLK_NR		2
+#define MTK_SMI_LARB_OPT_CLK_NR		1
+
+/*
+ * common: Require these four clocks in has_gals case. Otherwise, only apb/smi are required.
+ */
+static const char * const mtk_smi_common_clks[] = {"apb", "smi", "gals0", "gals1"};
+#define MTK_SMI_COM_REQ_CLK_NR		2
+#define MTK_SMI_COM_GALS_REQ_CLK_NR	MTK_SMI_CLK_NR_MAX
+
 struct mtk_smi_common_plat {
 	enum mtk_smi_gen gen;
 	bool             has_gals;
@@ -70,13 +84,12 @@ struct mtk_smi_larb_gen {
 	int port_in_larb[MTK_LARB_NR_MAX + 1];
 	void (*config_port)(struct device *dev);
 	unsigned int			larb_direct_to_common_mask;
-	bool				has_gals;
 };
 
 struct mtk_smi {
 	struct device			*dev;
-	struct clk			*clk_apb, *clk_smi;
-	struct clk			*clk_gals0, *clk_gals1;
+	unsigned int			clk_num;
+	struct clk_bulk_data		clks[MTK_SMI_CLK_NR_MAX];
 	struct clk			*clk_async; /*only needed by mt2701*/
 	union {
 		void __iomem		*smi_ao_base; /* only for gen1 */
@@ -95,45 +108,6 @@ struct mtk_smi_larb { /* larb: local arbiter */
 	unsigned char			*bank;
 };
 
-static int mtk_smi_clk_enable(const struct mtk_smi *smi)
-{
-	int ret;
-
-	ret = clk_prepare_enable(smi->clk_apb);
-	if (ret)
-		return ret;
-
-	ret = clk_prepare_enable(smi->clk_smi);
-	if (ret)
-		goto err_disable_apb;
-
-	ret = clk_prepare_enable(smi->clk_gals0);
-	if (ret)
-		goto err_disable_smi;
-
-	ret = clk_prepare_enable(smi->clk_gals1);
-	if (ret)
-		goto err_disable_gals0;
-
-	return 0;
-
-err_disable_gals0:
-	clk_disable_unprepare(smi->clk_gals0);
-err_disable_smi:
-	clk_disable_unprepare(smi->clk_smi);
-err_disable_apb:
-	clk_disable_unprepare(smi->clk_apb);
-	return ret;
-}
-
-static void mtk_smi_clk_disable(const struct mtk_smi *smi)
-{
-	clk_disable_unprepare(smi->clk_gals1);
-	clk_disable_unprepare(smi->clk_gals0);
-	clk_disable_unprepare(smi->clk_smi);
-	clk_disable_unprepare(smi->clk_apb);
-}
-
 int mtk_smi_larb_get(struct device *larbdev)
 {
 	int ret = pm_runtime_resume_and_get(larbdev);
@@ -270,7 +244,6 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt6779 = {
 };
 
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8183 = {
-	.has_gals                   = true,
 	.config_port                = mtk_smi_larb_config_port_gen2_general,
 	.larb_direct_to_common_mask = BIT(2) | BIT(3) | BIT(7),
 				      /* IPU0 | IPU1 | CCU */
@@ -312,6 +285,27 @@ static const struct of_device_id mtk_smi_larb_of_ids[] = {
 	{}
 };
 
+static int mtk_smi_dts_clk_init(struct device *dev, struct mtk_smi *smi,
+				const char * const clks[],
+				unsigned int clk_nr_required,
+				unsigned int clk_nr_optional)
+{
+	int i, ret;
+
+	for (i = 0; i < clk_nr_required; i++)
+		smi->clks[i].id = clks[i];
+	ret = devm_clk_bulk_get(dev, clk_nr_required, smi->clks);
+	if (ret)
+		return ret;
+
+	for (i = clk_nr_required; i < clk_nr_required + clk_nr_optional; i++)
+		smi->clks[i].id = clks[i];
+	ret = devm_clk_bulk_get_optional(dev, clk_nr_optional,
+					 smi->clks + clk_nr_required);
+	smi->clk_num = clk_nr_required + clk_nr_optional;
+	return ret;
+}
+
 static int mtk_smi_larb_probe(struct platform_device *pdev)
 {
 	struct mtk_smi_larb *larb;
@@ -320,6 +314,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 	struct device_node *smi_node;
 	struct platform_device *smi_pdev;
 	struct device_link *link;
+	int ret;
 
 	larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL);
 	if (!larb)
@@ -331,24 +326,12 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 	if (IS_ERR(larb->base))
 		return PTR_ERR(larb->base);
 
-	larb->smi.clk_apb = devm_clk_get(dev, "apb");
-	if (IS_ERR(larb->smi.clk_apb))
-		return PTR_ERR(larb->smi.clk_apb);
-
-	larb->smi.clk_smi = devm_clk_get(dev, "smi");
-	if (IS_ERR(larb->smi.clk_smi))
-		return PTR_ERR(larb->smi.clk_smi);
-
-	if (larb->larb_gen->has_gals) {
-		/* The larbs may still haven't gals even if the SoC support.*/
-		larb->smi.clk_gals0 = devm_clk_get(dev, "gals");
-		if (PTR_ERR(larb->smi.clk_gals0) == -ENOENT)
-			larb->smi.clk_gals0 = NULL;
-		else if (IS_ERR(larb->smi.clk_gals0))
-			return PTR_ERR(larb->smi.clk_gals0);
-	}
-	larb->smi.dev = dev;
+	ret = mtk_smi_dts_clk_init(dev, &larb->smi, mtk_smi_larb_clks,
+				   MTK_SMI_LARB_REQ_CLK_NR, MTK_SMI_LARB_OPT_CLK_NR);
+	if (ret)
+		return ret;
 
+	larb->smi.dev = dev;
 	smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
 	if (!smi_node)
 		return -EINVAL;
@@ -391,11 +374,9 @@ static int __maybe_unused mtk_smi_larb_resume(struct device *dev)
 	const struct mtk_smi_larb_gen *larb_gen = larb->larb_gen;
 	int ret;
 
-	ret = mtk_smi_clk_enable(&larb->smi);
-	if (ret < 0) {
-		dev_err(dev, "Failed to enable clock(%d).\n", ret);
+	ret = clk_bulk_prepare_enable(larb->smi.clk_num, larb->smi.clks);
+	if (ret < 0)
 		return ret;
-	}
 
 	/* Configure the basic setting for this larb */
 	larb_gen->config_port(dev);
@@ -407,7 +388,7 @@ static int __maybe_unused mtk_smi_larb_suspend(struct device *dev)
 {
 	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
 
-	mtk_smi_clk_disable(&larb->smi);
+	clk_bulk_disable_unprepare(larb->smi.clk_num, larb->smi.clks);
 	return 0;
 }
 
@@ -493,7 +474,7 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 	struct device *dev = &pdev->dev;
 	struct mtk_smi *common;
 	struct resource *res;
-	int ret;
+	int ret, clk_required = MTK_SMI_COM_REQ_CLK_NR;
 
 	common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
 	if (!common)
@@ -501,23 +482,11 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 	common->dev = dev;
 	common->plat = of_device_get_match_data(dev);
 
-	common->clk_apb = devm_clk_get(dev, "apb");
-	if (IS_ERR(common->clk_apb))
-		return PTR_ERR(common->clk_apb);
-
-	common->clk_smi = devm_clk_get(dev, "smi");
-	if (IS_ERR(common->clk_smi))
-		return PTR_ERR(common->clk_smi);
-
-	if (common->plat->has_gals) {
-		common->clk_gals0 = devm_clk_get(dev, "gals0");
-		if (IS_ERR(common->clk_gals0))
-			return PTR_ERR(common->clk_gals0);
-
-		common->clk_gals1 = devm_clk_get(dev, "gals1");
-		if (IS_ERR(common->clk_gals1))
-			return PTR_ERR(common->clk_gals1);
-	}
+	if (common->plat->has_gals)
+		clk_required = MTK_SMI_COM_GALS_REQ_CLK_NR;
+	ret = mtk_smi_dts_clk_init(dev, common, mtk_smi_common_clks, clk_required, 0);
+	if (ret)
+		return ret;
 
 	/*
 	 * for mtk smi gen 1, we need to get the ao(always on) base to config
@@ -561,11 +530,9 @@ static int __maybe_unused mtk_smi_common_resume(struct device *dev)
 	u32 bus_sel = common->plat->bus_sel;
 	int ret;
 
-	ret = mtk_smi_clk_enable(common);
-	if (ret) {
-		dev_err(common->dev, "Failed to enable clock(%d).\n", ret);
+	ret = clk_bulk_prepare_enable(common->clk_num, common->clks);
+	if (ret)
 		return ret;
-	}
 
 	if (common->plat->gen == MTK_SMI_GEN2 && bus_sel)
 		writel(bus_sel, common->base + SMI_BUS_SEL);
@@ -576,7 +543,7 @@ static int __maybe_unused mtk_smi_common_suspend(struct device *dev)
 {
 	struct mtk_smi *common = dev_get_drvdata(dev);
 
-	mtk_smi_clk_disable(common);
+	clk_bulk_disable_unprepare(common->clk_num, common->clks);
 	return 0;
 }
 
-- 
2.18.0

[PATCH v3 04/13] memory: mtk-smi: Rename smi_gen to smi_type

[Yong Wu]

Prepare for adding smi sub common. Only rename from smi_gen to smi_type.
No functional change.

About the current "smi_gen", we have gen1/gen2 that stand for the
generation number for HW. I plan to add a new type(sub_common), then the
name "gen" is not proper.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
---
 drivers/memory/mtk-smi.c | 28 ++++++++++++++--------------
 1 file changed, 14 insertions(+), 14 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index f91eaf5c3ab0..02a584dfb9b1 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -55,7 +55,7 @@
 /* All are MMU0 defaultly. Only specialize mmu1 here. */
 #define F_MMU1_LARB(larbid)		(0x1 << SMI_BUS_LARB_SHIFT(larbid))
 
-enum mtk_smi_gen {
+enum mtk_smi_type {
 	MTK_SMI_GEN1,
 	MTK_SMI_GEN2
 };
@@ -75,9 +75,9 @@ static const char * const mtk_smi_common_clks[] = {"apb", "smi", "gals0", "gals1
 #define MTK_SMI_COM_GALS_REQ_CLK_NR	MTK_SMI_CLK_NR_MAX
 
 struct mtk_smi_common_plat {
-	enum mtk_smi_gen gen;
-	bool             has_gals;
-	u32              bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */
+	enum mtk_smi_type	type;
+	bool			has_gals;
+	u32			bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */
 };
 
 struct mtk_smi_larb_gen {
@@ -409,29 +409,29 @@ static struct platform_driver mtk_smi_larb_driver = {
 };
 
 static const struct mtk_smi_common_plat mtk_smi_common_gen1 = {
-	.gen = MTK_SMI_GEN1,
+	.type     = MTK_SMI_GEN1,
 };
 
 static const struct mtk_smi_common_plat mtk_smi_common_gen2 = {
-	.gen = MTK_SMI_GEN2,
+	.type	  = MTK_SMI_GEN2,
 };
 
 static const struct mtk_smi_common_plat mtk_smi_common_mt6779 = {
-	.gen		= MTK_SMI_GEN2,
-	.has_gals	= true,
-	.bus_sel	= F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(4) |
-			  F_MMU1_LARB(5) | F_MMU1_LARB(6) | F_MMU1_LARB(7),
+	.type	  = MTK_SMI_GEN2,
+	.has_gals = true,
+	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(4) |
+		    F_MMU1_LARB(5) | F_MMU1_LARB(6) | F_MMU1_LARB(7),
 };
 
 static const struct mtk_smi_common_plat mtk_smi_common_mt8183 = {
-	.gen      = MTK_SMI_GEN2,
+	.type     = MTK_SMI_GEN2,
 	.has_gals = true,
 	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
 		    F_MMU1_LARB(7),
 };
 
 static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = {
-	.gen      = MTK_SMI_GEN2,
+	.type     = MTK_SMI_GEN2,
 	.has_gals = true,
 	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(5) |
 		    F_MMU1_LARB(6),
@@ -494,7 +494,7 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 	 * clock into emi clock domain, but for mtk smi gen2, there's no smi ao
 	 * base.
 	 */
-	if (common->plat->gen == MTK_SMI_GEN1) {
+	if (common->plat->type == MTK_SMI_GEN1) {
 		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 		common->smi_ao_base = devm_ioremap_resource(dev, res);
 		if (IS_ERR(common->smi_ao_base))
@@ -534,7 +534,7 @@ static int __maybe_unused mtk_smi_common_resume(struct device *dev)
 	if (ret)
 		return ret;
 
-	if (common->plat->gen == MTK_SMI_GEN2 && bus_sel)
+	if (common->plat->type == MTK_SMI_GEN2 && bus_sel)
 		writel(bus_sel, common->base + SMI_BUS_SEL);
 	return 0;
 }
-- 
2.18.0

[PATCH v3 05/13] memory: mtk-smi: Adjust some code position

[Yong Wu]

No functional change. Only move the code position to make the code more
readable.
1. Put the register smi-common above smi-larb. Prepare to add some others
   register setting.
2. Put mtk_smi_larb_unbind around larb_bind.
3. Sort the SoC data alphabetically. and put them in one line as the
   current kernel allow it.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
---
 drivers/memory/mtk-smi.c | 188 ++++++++++++++++-----------------------
 1 file changed, 75 insertions(+), 113 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 02a584dfb9b1..33b6c5efe102 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -17,13 +17,16 @@
 #include <dt-bindings/memory/mt2701-larb-port.h>
 #include <dt-bindings/memory/mtk-memory-port.h>
 
-/* mt8173 */
-#define SMI_LARB_MMU_EN		0xf00
+/* SMI COMMON */
+#define SMI_BUS_SEL			0x220
+#define SMI_BUS_LARB_SHIFT(larbid)	((larbid) << 1)
+/* All are MMU0 defaultly. Only specialize mmu1 here. */
+#define F_MMU1_LARB(larbid)		(0x1 << SMI_BUS_LARB_SHIFT(larbid))
 
-/* mt8167 */
-#define MT8167_SMI_LARB_MMU_EN	0xfc0
+/* SMI LARB */
 
-/* mt2701 */
+/* Below are about mmu enable registers, they are different in SoCs */
+/* gen1: mt2701 */
 #define REG_SMI_SECUR_CON_BASE		0x5c0
 
 /* every register control 8 port, register offset 0x4 */
@@ -41,20 +44,21 @@
 /* mt2701 domain should be set to 3 */
 #define SMI_SECUR_CON_VAL_DOMAIN(id)	(0x3 << ((((id) & 0x7) << 2) + 1))
 
-/* mt2712 */
-#define SMI_LARB_NONSEC_CON(id)	(0x380 + ((id) * 4))
-#define F_MMU_EN		BIT(0)
-#define BANK_SEL(id)		({			\
+/* gen2: */
+/* mt8167 */
+#define MT8167_SMI_LARB_MMU_EN		0xfc0
+
+/* mt8173 */
+#define MT8173_SMI_LARB_MMU_EN		0xf00
+
+/* general */
+#define SMI_LARB_NONSEC_CON(id)		(0x380 + ((id) * 4))
+#define F_MMU_EN			BIT(0)
+#define BANK_SEL(id)			({		\
 	u32 _id = (id) & 0x3;				\
 	(_id << 8 | _id << 10 | _id << 12 | _id << 14);	\
 })
 
-/* SMI COMMON */
-#define SMI_BUS_SEL			0x220
-#define SMI_BUS_LARB_SHIFT(larbid)	((larbid) << 1)
-/* All are MMU0 defaultly. Only specialize mmu1 here. */
-#define F_MMU1_LARB(larbid)		(0x1 << SMI_BUS_LARB_SHIFT(larbid))
-
 enum mtk_smi_type {
 	MTK_SMI_GEN1,
 	MTK_SMI_GEN2
@@ -140,36 +144,16 @@ mtk_smi_larb_bind(struct device *dev, struct device *master, void *data)
 	return -ENODEV;
 }
 
-static void mtk_smi_larb_config_port_gen2_general(struct device *dev)
-{
-	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
-	u32 reg;
-	int i;
-
-	if (BIT(larb->larbid) & larb->larb_gen->larb_direct_to_common_mask)
-		return;
-
-	for_each_set_bit(i, (unsigned long *)larb->mmu, 32) {
-		reg = readl_relaxed(larb->base + SMI_LARB_NONSEC_CON(i));
-		reg |= F_MMU_EN;
-		reg |= BANK_SEL(larb->bank[i]);
-		writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
-	}
-}
-
-static void mtk_smi_larb_config_port_mt8173(struct device *dev)
+static void
+mtk_smi_larb_unbind(struct device *dev, struct device *master, void *data)
 {
-	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
-
-	writel(*larb->mmu, larb->base + SMI_LARB_MMU_EN);
+	/* Do nothing as the iommu is always enabled. */
 }
 
-static void mtk_smi_larb_config_port_mt8167(struct device *dev)
-{
-	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
-
-	writel(*larb->mmu, larb->base + MT8167_SMI_LARB_MMU_EN);
-}
+static const struct component_ops mtk_smi_larb_component_ops = {
+	.bind = mtk_smi_larb_bind,
+	.unbind = mtk_smi_larb_unbind,
+};
 
 static void mtk_smi_larb_config_port_gen1(struct device *dev)
 {
@@ -202,26 +186,36 @@ static void mtk_smi_larb_config_port_gen1(struct device *dev)
 	}
 }
 
-static void
-mtk_smi_larb_unbind(struct device *dev, struct device *master, void *data)
+static void mtk_smi_larb_config_port_mt8167(struct device *dev)
 {
-	/* Do nothing as the iommu is always enabled. */
+	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
+
+	writel(*larb->mmu, larb->base + MT8167_SMI_LARB_MMU_EN);
 }
 
-static const struct component_ops mtk_smi_larb_component_ops = {
-	.bind = mtk_smi_larb_bind,
-	.unbind = mtk_smi_larb_unbind,
-};
+static void mtk_smi_larb_config_port_mt8173(struct device *dev)
+{
+	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
 
-static const struct mtk_smi_larb_gen mtk_smi_larb_mt8173 = {
-	/* mt8173 do not need the port in larb */
-	.config_port = mtk_smi_larb_config_port_mt8173,
-};
+	writel(*larb->mmu, larb->base + MT8173_SMI_LARB_MMU_EN);
+}
 
-static const struct mtk_smi_larb_gen mtk_smi_larb_mt8167 = {
-	/* mt8167 do not need the port in larb */
-	.config_port = mtk_smi_larb_config_port_mt8167,
-};
+static void mtk_smi_larb_config_port_gen2_general(struct device *dev)
+{
+	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
+	u32 reg;
+	int i;
+
+	if (BIT(larb->larbid) & larb->larb_gen->larb_direct_to_common_mask)
+		return;
+
+	for_each_set_bit(i, (unsigned long *)larb->mmu, 32) {
+		reg = readl_relaxed(larb->base + SMI_LARB_NONSEC_CON(i));
+		reg |= F_MMU_EN;
+		reg |= BANK_SEL(larb->bank[i]);
+		writel(reg, larb->base + SMI_LARB_NONSEC_CON(i));
+	}
+}
 
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = {
 	.port_in_larb = {
@@ -243,6 +237,16 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt6779 = {
 		/* DUMMY | IPU0 | IPU1 | CCU | MDLA */
 };
 
+static const struct mtk_smi_larb_gen mtk_smi_larb_mt8167 = {
+	/* mt8167 do not need the port in larb */
+	.config_port = mtk_smi_larb_config_port_mt8167,
+};
+
+static const struct mtk_smi_larb_gen mtk_smi_larb_mt8173 = {
+	/* mt8173 do not need the port in larb */
+	.config_port = mtk_smi_larb_config_port_mt8173,
+};
+
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8183 = {
 	.config_port                = mtk_smi_larb_config_port_gen2_general,
 	.larb_direct_to_common_mask = BIT(2) | BIT(3) | BIT(7),
@@ -254,34 +258,13 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = {
 };
 
 static const struct of_device_id mtk_smi_larb_of_ids[] = {
-	{
-		.compatible = "mediatek,mt8167-smi-larb",
-		.data = &mtk_smi_larb_mt8167
-	},
-	{
-		.compatible = "mediatek,mt8173-smi-larb",
-		.data = &mtk_smi_larb_mt8173
-	},
-	{
-		.compatible = "mediatek,mt2701-smi-larb",
-		.data = &mtk_smi_larb_mt2701
-	},
-	{
-		.compatible = "mediatek,mt2712-smi-larb",
-		.data = &mtk_smi_larb_mt2712
-	},
-	{
-		.compatible = "mediatek,mt6779-smi-larb",
-		.data = &mtk_smi_larb_mt6779
-	},
-	{
-		.compatible = "mediatek,mt8183-smi-larb",
-		.data = &mtk_smi_larb_mt8183
-	},
-	{
-		.compatible = "mediatek,mt8192-smi-larb",
-		.data = &mtk_smi_larb_mt8192
-	},
+	{.compatible = "mediatek,mt2701-smi-larb", .data = &mtk_smi_larb_mt2701},
+	{.compatible = "mediatek,mt2712-smi-larb", .data = &mtk_smi_larb_mt2712},
+	{.compatible = "mediatek,mt6779-smi-larb", .data = &mtk_smi_larb_mt6779},
+	{.compatible = "mediatek,mt8167-smi-larb", .data = &mtk_smi_larb_mt8167},
+	{.compatible = "mediatek,mt8173-smi-larb", .data = &mtk_smi_larb_mt8173},
+	{.compatible = "mediatek,mt8183-smi-larb", .data = &mtk_smi_larb_mt8183},
+	{.compatible = "mediatek,mt8192-smi-larb", .data = &mtk_smi_larb_mt8192},
 	{}
 };
 
@@ -438,34 +421,13 @@ static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = {
 };
 
 static const struct of_device_id mtk_smi_common_of_ids[] = {
-	{
-		.compatible = "mediatek,mt8173-smi-common",
-		.data = &mtk_smi_common_gen2,
-	},
-	{
-		.compatible = "mediatek,mt8167-smi-common",
-		.data = &mtk_smi_common_gen2,
-	},
-	{
-		.compatible = "mediatek,mt2701-smi-common",
-		.data = &mtk_smi_common_gen1,
-	},
-	{
-		.compatible = "mediatek,mt2712-smi-common",
-		.data = &mtk_smi_common_gen2,
-	},
-	{
-		.compatible = "mediatek,mt6779-smi-common",
-		.data = &mtk_smi_common_mt6779,
-	},
-	{
-		.compatible = "mediatek,mt8183-smi-common",
-		.data = &mtk_smi_common_mt8183,
-	},
-	{
-		.compatible = "mediatek,mt8192-smi-common",
-		.data = &mtk_smi_common_mt8192,
-	},
+	{.compatible = "mediatek,mt2701-smi-common", .data = &mtk_smi_common_gen1},
+	{.compatible = "mediatek,mt2712-smi-common", .data = &mtk_smi_common_gen2},
+	{.compatible = "mediatek,mt6779-smi-common", .data = &mtk_smi_common_mt6779},
+	{.compatible = "mediatek,mt8167-smi-common", .data = &mtk_smi_common_gen2},
+	{.compatible = "mediatek,mt8173-smi-common", .data = &mtk_smi_common_gen2},
+	{.compatible = "mediatek,mt8183-smi-common", .data = &mtk_smi_common_mt8183},
+	{.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192},
 	{}
 };
 
-- 
2.18.0

[PATCH v3 06/13] memory: mtk-smi: Add error handle for smi_probe

[Yong Wu]

Add error handle while component_add fail.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
---
 drivers/memory/mtk-smi.c | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 33b6c5efe102..b362d528944e 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -338,7 +338,15 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 
 	pm_runtime_enable(dev);
 	platform_set_drvdata(pdev, larb);
-	return component_add(dev, &mtk_smi_larb_component_ops);
+	ret = component_add(dev, &mtk_smi_larb_component_ops);
+	if (ret)
+		goto err_pm_disable;
+	return 0;
+
+err_pm_disable:
+	pm_runtime_disable(dev);
+	device_link_remove(dev, larb->smi_common_dev);
+	return ret;
 }
 
 static int mtk_smi_larb_remove(struct platform_device *pdev)
-- 
2.18.0

[PATCH v3 07/13] memory: mtk-smi: Add device link for smi-sub-common

[Yong Wu]

In mt8195, there are some larbs connect with the smi-sub-common, then
connect with smi-common.

Before we create device link between smi-larb with smi-common. If we have
sub-common, we should use device link the smi-larb and smi-sub-common,
then use device link between the smi-sub-common with smi-common. This is
for enabling clock/power automatically.

Move the device link code to a new interface for reusing.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
---
 drivers/memory/mtk-smi.c | 75 +++++++++++++++++++++++++++-------------
 1 file changed, 51 insertions(+), 24 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index b362d528944e..5c2bd5795cfd 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -61,7 +61,8 @@
 
 enum mtk_smi_type {
 	MTK_SMI_GEN1,
-	MTK_SMI_GEN2
+	MTK_SMI_GEN2,		/* gen2 smi common */
+	MTK_SMI_GEN2_SUB_COMM,	/* gen2 smi sub common */
 };
 
 #define MTK_SMI_CLK_NR_MAX			4
@@ -99,13 +100,14 @@ struct mtk_smi {
 		void __iomem		*smi_ao_base; /* only for gen1 */
 		void __iomem		*base;	      /* only for gen2 */
 	};
+	struct device			*smi_common_dev; /* for sub common */
 	const struct mtk_smi_common_plat *plat;
 };
 
 struct mtk_smi_larb { /* larb: local arbiter */
 	struct mtk_smi			smi;
 	void __iomem			*base;
-	struct device			*smi_common_dev;
+	struct device			*smi_common_dev; /* common or sub-common dev */
 	const struct mtk_smi_larb_gen	*larb_gen;
 	int				larbid;
 	u32				*mmu;
@@ -268,6 +270,38 @@ static const struct of_device_id mtk_smi_larb_of_ids[] = {
 	{}
 };
 
+static int mtk_smi_device_link_common(struct device *dev, struct device **com_dev)
+{
+	struct platform_device *smi_com_pdev;
+	struct device_node *smi_com_node;
+	struct device *smi_com_dev;
+	struct device_link *link;
+
+	smi_com_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
+	if (!smi_com_node)
+		return -EINVAL;
+
+	smi_com_pdev = of_find_device_by_node(smi_com_node);
+	of_node_put(smi_com_node);
+	if (smi_com_pdev) {
+		/* smi common is the supplier, Make sure it is ready before */
+		if (!platform_get_drvdata(smi_com_pdev))
+			return -EPROBE_DEFER;
+		smi_com_dev = &smi_com_pdev->dev;
+		link = device_link_add(dev, smi_com_dev,
+				       DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
+		if (!link) {
+			dev_err(dev, "Unable to link smi-common dev\n");
+			return -ENODEV;
+		}
+		*com_dev = smi_com_dev;
+	} else {
+		dev_err(dev, "Failed to get the smi_common device\n");
+		return -EINVAL;
+	}
+	return 0;
+}
+
 static int mtk_smi_dts_clk_init(struct device *dev, struct mtk_smi *smi,
 				const char * const clks[],
 				unsigned int clk_nr_required,
@@ -294,9 +328,6 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 	struct mtk_smi_larb *larb;
 	struct resource *res;
 	struct device *dev = &pdev->dev;
-	struct device_node *smi_node;
-	struct platform_device *smi_pdev;
-	struct device_link *link;
 	int ret;
 
 	larb = devm_kzalloc(dev, sizeof(*larb), GFP_KERNEL);
@@ -315,26 +346,10 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 		return ret;
 
 	larb->smi.dev = dev;
-	smi_node = of_parse_phandle(dev->of_node, "mediatek,smi", 0);
-	if (!smi_node)
-		return -EINVAL;
 
-	smi_pdev = of_find_device_by_node(smi_node);
-	of_node_put(smi_node);
-	if (smi_pdev) {
-		if (!platform_get_drvdata(smi_pdev))
-			return -EPROBE_DEFER;
-		larb->smi_common_dev = &smi_pdev->dev;
-		link = device_link_add(dev, larb->smi_common_dev,
-				       DL_FLAG_PM_RUNTIME | DL_FLAG_STATELESS);
-		if (!link) {
-			dev_err(dev, "Unable to link smi-common dev\n");
-			return -ENODEV;
-		}
-	} else {
-		dev_err(dev, "Failed to get the smi_common device\n");
-		return -EINVAL;
-	}
+	ret = mtk_smi_device_link_common(dev, &larb->smi_common_dev);
+	if (ret < 0)
+		return ret;
 
 	pm_runtime_enable(dev);
 	platform_set_drvdata(pdev, larb);
@@ -483,6 +498,14 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 		if (IS_ERR(common->base))
 			return PTR_ERR(common->base);
 	}
+
+	/* link its smi-common if this is smi-sub-common */
+	if (common->plat->type == MTK_SMI_GEN2_SUB_COMM) {
+		ret = mtk_smi_device_link_common(dev, &common->smi_common_dev);
+		if (ret < 0)
+			return ret;
+	}
+
 	pm_runtime_enable(dev);
 	platform_set_drvdata(pdev, common);
 	return 0;
@@ -490,6 +513,10 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 
 static int mtk_smi_common_remove(struct platform_device *pdev)
 {
+	struct mtk_smi *common = dev_get_drvdata(&pdev->dev);
+
+	if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
+		device_link_remove(&pdev->dev, common->smi_common_dev);
 	pm_runtime_disable(&pdev->dev);
 	return 0;
 }
-- 
2.18.0

[PATCH v3 08/13] memory: mtk-smi: Add clocks for smi-sub-common

[Yong Wu]

SMI sub common only have one output port. thus it has only one gals
clocks(gals0). then, smi-sub-common require the three clocks(apb/smi/gals0)
in has_gals case.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/memory/mtk-smi.c | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 5c2bd5795cfd..58d9f7667490 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -74,10 +74,12 @@ static const char * const mtk_smi_larb_clks[] = {"apb", "smi", "gals"};
 
 /*
  * common: Require these four clocks in has_gals case. Otherwise, only apb/smi are required.
+ * sub common: Require apb/smi/gals0 clocks in has_gals case. Otherwise, only apb/smi are required.
  */
 static const char * const mtk_smi_common_clks[] = {"apb", "smi", "gals0", "gals1"};
 #define MTK_SMI_COM_REQ_CLK_NR		2
 #define MTK_SMI_COM_GALS_REQ_CLK_NR	MTK_SMI_CLK_NR_MAX
+#define MTK_SMI_SUB_COM_GALS_REQ_CLK_NR 3
 
 struct mtk_smi_common_plat {
 	enum mtk_smi_type	type;
@@ -467,8 +469,12 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 	common->dev = dev;
 	common->plat = of_device_get_match_data(dev);
 
-	if (common->plat->has_gals)
-		clk_required = MTK_SMI_COM_GALS_REQ_CLK_NR;
+	if (common->plat->has_gals) {
+		if (common->plat->type == MTK_SMI_GEN2)
+			clk_required = MTK_SMI_COM_GALS_REQ_CLK_NR;
+		else if (common->plat->type == MTK_SMI_GEN2_SUB_COMM)
+			clk_required = MTK_SMI_SUB_COM_GALS_REQ_CLK_NR;
+	}
 	ret = mtk_smi_dts_clk_init(dev, common, mtk_smi_common_clks, clk_required, 0);
 	if (ret)
 		return ret;
-- 
2.18.0

[PATCH v3 09/13] memory: mtk-smi: Use devm_platform_ioremap_resource

[Yong Wu]

No functional change. Simplify probing code.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
---
 drivers/memory/mtk-smi.c | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 58d9f7667490..a001e41f5074 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -328,7 +328,6 @@ static int mtk_smi_dts_clk_init(struct device *dev, struct mtk_smi *smi,
 static int mtk_smi_larb_probe(struct platform_device *pdev)
 {
 	struct mtk_smi_larb *larb;
-	struct resource *res;
 	struct device *dev = &pdev->dev;
 	int ret;
 
@@ -337,8 +336,7 @@ static int mtk_smi_larb_probe(struct platform_device *pdev)
 		return -ENOMEM;
 
 	larb->larb_gen = of_device_get_match_data(dev);
-	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-	larb->base = devm_ioremap_resource(dev, res);
+	larb->base = devm_platform_ioremap_resource(pdev, 0);
 	if (IS_ERR(larb->base))
 		return PTR_ERR(larb->base);
 
@@ -460,7 +458,6 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 {
 	struct device *dev = &pdev->dev;
 	struct mtk_smi *common;
-	struct resource *res;
 	int ret, clk_required = MTK_SMI_COM_REQ_CLK_NR;
 
 	common = devm_kzalloc(dev, sizeof(*common), GFP_KERNEL);
@@ -486,8 +483,7 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 	 * base.
 	 */
 	if (common->plat->type == MTK_SMI_GEN1) {
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-		common->smi_ao_base = devm_ioremap_resource(dev, res);
+		common->smi_ao_base = devm_platform_ioremap_resource(pdev, 0);
 		if (IS_ERR(common->smi_ao_base))
 			return PTR_ERR(common->smi_ao_base);
 
@@ -499,8 +495,7 @@ static int mtk_smi_common_probe(struct platform_device *pdev)
 		if (ret)
 			return ret;
 	} else {
-		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
-		common->base = devm_ioremap_resource(dev, res);
+		common->base = devm_platform_ioremap_resource(pdev, 0);
 		if (IS_ERR(common->base))
 			return PTR_ERR(common->base);
 	}
-- 
2.18.0

[PATCH v3 10/13] memory: mtk-smi: mt8195: Add smi support

[Yong Wu]

MT8195 has two smi-common, their IP are the same. Only the larbs that
connect with the smi-common are different. thus the bus_sel are different
for the two smi-common.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
Reviewed-by: Ikjoon Jang <ikjn@chromium.org>
---
 drivers/memory/mtk-smi.c | 26 ++++++++++++++++++++++++++
 1 file changed, 26 insertions(+)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index a001e41f5074..35853ba980c9 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -261,6 +261,10 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = {
 	.config_port                = mtk_smi_larb_config_port_gen2_general,
 };
 
+static const struct mtk_smi_larb_gen mtk_smi_larb_mt8195 = {
+	.config_port                = mtk_smi_larb_config_port_gen2_general,
+};
+
 static const struct of_device_id mtk_smi_larb_of_ids[] = {
 	{.compatible = "mediatek,mt2701-smi-larb", .data = &mtk_smi_larb_mt2701},
 	{.compatible = "mediatek,mt2712-smi-larb", .data = &mtk_smi_larb_mt2712},
@@ -269,6 +273,7 @@ static const struct of_device_id mtk_smi_larb_of_ids[] = {
 	{.compatible = "mediatek,mt8173-smi-larb", .data = &mtk_smi_larb_mt8173},
 	{.compatible = "mediatek,mt8183-smi-larb", .data = &mtk_smi_larb_mt8183},
 	{.compatible = "mediatek,mt8192-smi-larb", .data = &mtk_smi_larb_mt8192},
+	{.compatible = "mediatek,mt8195-smi-larb", .data = &mtk_smi_larb_mt8195},
 	{}
 };
 
@@ -443,6 +448,24 @@ static const struct mtk_smi_common_plat mtk_smi_common_mt8192 = {
 		    F_MMU1_LARB(6),
 };
 
+static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vdo = {
+	.type     = MTK_SMI_GEN2,
+	.has_gals = true,
+	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(3) | F_MMU1_LARB(5) |
+		    F_MMU1_LARB(7),
+};
+
+static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vpp = {
+	.type     = MTK_SMI_GEN2,
+	.has_gals = true,
+	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(7),
+};
+
+static const struct mtk_smi_common_plat mtk_smi_sub_common_mt8195 = {
+	.type     = MTK_SMI_GEN2_SUB_COMM,
+	.has_gals = true,
+};
+
 static const struct of_device_id mtk_smi_common_of_ids[] = {
 	{.compatible = "mediatek,mt2701-smi-common", .data = &mtk_smi_common_gen1},
 	{.compatible = "mediatek,mt2712-smi-common", .data = &mtk_smi_common_gen2},
@@ -451,6 +474,9 @@ static const struct of_device_id mtk_smi_common_of_ids[] = {
 	{.compatible = "mediatek,mt8173-smi-common", .data = &mtk_smi_common_gen2},
 	{.compatible = "mediatek,mt8183-smi-common", .data = &mtk_smi_common_mt8183},
 	{.compatible = "mediatek,mt8192-smi-common", .data = &mtk_smi_common_mt8192},
+	{.compatible = "mediatek,mt8195-smi-common-vdo", .data = &mtk_smi_common_mt8195_vdo},
+	{.compatible = "mediatek,mt8195-smi-common-vpp", .data = &mtk_smi_common_mt8195_vpp},
+	{.compatible = "mediatek,mt8195-smi-sub-common", .data = &mtk_smi_sub_common_mt8195},
 	{}
 };
 
-- 
2.18.0

[PATCH v3 11/13] memory: mtk-smi: mt8195: Add initial setting for smi-common

[Yong Wu]

To improve the performance, add initial setting for smi-common.
some register use some fix setting(suggested from DE).

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/memory/mtk-smi.c | 42 ++++++++++++++++++++++++++++++++++++----
 1 file changed, 38 insertions(+), 4 deletions(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 35853ba980c9..689a45b39a65 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -18,11 +18,19 @@
 #include <dt-bindings/memory/mtk-memory-port.h>
 
 /* SMI COMMON */
+#define SMI_L1LEN			0x100
+
 #define SMI_BUS_SEL			0x220
 #define SMI_BUS_LARB_SHIFT(larbid)	((larbid) << 1)
 /* All are MMU0 defaultly. Only specialize mmu1 here. */
 #define F_MMU1_LARB(larbid)		(0x1 << SMI_BUS_LARB_SHIFT(larbid))
 
+#define SMI_M4U_TH			0x234
+#define SMI_FIFO_TH1			0x238
+#define SMI_FIFO_TH2			0x23c
+#define SMI_DCM				0x300
+#define SMI_DUMMY			0x444
+
 /* SMI LARB */
 
 /* Below are about mmu enable registers, they are different in SoCs */
@@ -59,6 +67,13 @@
 	(_id << 8 | _id << 10 | _id << 12 | _id << 14);	\
 })
 
+#define SMI_COMMON_INIT_REGS_NR		6
+
+struct mtk_smi_reg_pair {
+	unsigned int		offset;
+	u32			value;
+};
+
 enum mtk_smi_type {
 	MTK_SMI_GEN1,
 	MTK_SMI_GEN2,		/* gen2 smi common */
@@ -85,6 +100,8 @@ struct mtk_smi_common_plat {
 	enum mtk_smi_type	type;
 	bool			has_gals;
 	u32			bus_sel; /* Balance some larbs to enter mmu0 or mmu1 */
+
+	const struct mtk_smi_reg_pair	*init;
 };
 
 struct mtk_smi_larb_gen {
@@ -419,6 +436,15 @@ static struct platform_driver mtk_smi_larb_driver = {
 	}
 };
 
+static const struct mtk_smi_reg_pair mtk_smi_common_mt8195_init[SMI_COMMON_INIT_REGS_NR] = {
+	{SMI_L1LEN, 0xb},
+	{SMI_M4U_TH, 0xe100e10},
+	{SMI_FIFO_TH1, 0x506090a},
+	{SMI_FIFO_TH2, 0x506090a},
+	{SMI_DCM, 0x4f1},
+	{SMI_DUMMY, 0x1},
+};
+
 static const struct mtk_smi_common_plat mtk_smi_common_gen1 = {
 	.type     = MTK_SMI_GEN1,
 };
@@ -453,12 +479,14 @@ static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vdo = {
 	.has_gals = true,
 	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(3) | F_MMU1_LARB(5) |
 		    F_MMU1_LARB(7),
+	.init     = mtk_smi_common_mt8195_init,
 };
 
 static const struct mtk_smi_common_plat mtk_smi_common_mt8195_vpp = {
 	.type     = MTK_SMI_GEN2,
 	.has_gals = true,
 	.bus_sel  = F_MMU1_LARB(1) | F_MMU1_LARB(2) | F_MMU1_LARB(7),
+	.init     = mtk_smi_common_mt8195_init,
 };
 
 static const struct mtk_smi_common_plat mtk_smi_sub_common_mt8195 = {
@@ -551,15 +579,21 @@ static int mtk_smi_common_remove(struct platform_device *pdev)
 static int __maybe_unused mtk_smi_common_resume(struct device *dev)
 {
 	struct mtk_smi *common = dev_get_drvdata(dev);
-	u32 bus_sel = common->plat->bus_sel;
-	int ret;
+	const struct mtk_smi_reg_pair *init = common->plat->init;
+	u32 bus_sel = common->plat->bus_sel; /* default is 0 */
+	int ret, i;
 
 	ret = clk_bulk_prepare_enable(common->clk_num, common->clks);
 	if (ret)
 		return ret;
 
-	if (common->plat->type == MTK_SMI_GEN2 && bus_sel)
-		writel(bus_sel, common->base + SMI_BUS_SEL);
+	if (common->plat->type != MTK_SMI_GEN2)
+		return 0;
+
+	for (i = 0; i < SMI_COMMON_INIT_REGS_NR && init && init[i].offset; i++)
+		writel_relaxed(init[i].value, common->base + init[i].offset);
+
+	writel(bus_sel, common->base + SMI_BUS_SEL);
 	return 0;
 }
 
-- 
2.18.0

[PATCH v3 12/13] memory: mtk-smi: mt8195: Add initial setting for smi-larb

[Yong Wu]

To improve the performance, We add some initial setting for smi larbs.
there are two part:
1), Each port has the special ostd(outstanding) value in each larb.
2), Two general settings for each larb.
   a. THRT_UPDATE: the value in bits[7:4] of 0x24 is not so good.
   The HW default is 4, and we expect it is 5, thus, add a flag to update
   it. This is only a DE recommendatory value, not a actual issue.
   The register name(THRT_CON) means: throttling control, and the field
   RD_NU_LMT means: Read Non-ultra commands limit.
   This change means update the Read non-ultra command from 4 to 5 here.

   b. SW_FLAG: Set 1 to the FLAG register. this is only for helping
   debug. We could confirm if the larb is reset from this value is 1 or 0.

In some SoC, this setting maybe changed dynamically for some special case
like 4K, and this initial setting is enough in mt8195.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 drivers/memory/mtk-smi.c | 79 +++++++++++++++++++++++++++++++++++++++-
 1 file changed, 78 insertions(+), 1 deletion(-)

diff --git a/drivers/memory/mtk-smi.c b/drivers/memory/mtk-smi.c
index 689a45b39a65..b883dcc0bbfa 100644
--- a/drivers/memory/mtk-smi.c
+++ b/drivers/memory/mtk-smi.c
@@ -32,6 +32,15 @@
 #define SMI_DUMMY			0x444
 
 /* SMI LARB */
+#define SMI_LARB_CMD_THRT_CON		0x24
+#define SMI_LARB_THRT_RD_NU_LMT_MSK	GENMASK(7, 4)
+#define SMI_LARB_THRT_RD_NU_LMT		(5 << 4)
+
+#define SMI_LARB_SW_FLAG		0x40
+#define SMI_LARB_SW_FLAG_1		0x1
+
+#define SMI_LARB_OSTDL_PORT		0x200
+#define SMI_LARB_OSTDL_PORTx(id)	(SMI_LARB_OSTDL_PORT + (((id) & 0x1f) << 2))
 
 /* Below are about mmu enable registers, they are different in SoCs */
 /* gen1: mt2701 */
@@ -68,6 +77,11 @@
 })
 
 #define SMI_COMMON_INIT_REGS_NR		6
+#define SMI_LARB_PORT_NR_MAX		32
+
+#define MTK_SMI_FLAG_THRT_UPDATE	BIT(0)
+#define MTK_SMI_FLAG_SW_FLAG		BIT(1)
+#define MTK_SMI_CAPS(flags, _x)		(!!((flags) & (_x)))
 
 struct mtk_smi_reg_pair {
 	unsigned int		offset;
@@ -108,6 +122,8 @@ struct mtk_smi_larb_gen {
 	int port_in_larb[MTK_LARB_NR_MAX + 1];
 	void (*config_port)(struct device *dev);
 	unsigned int			larb_direct_to_common_mask;
+	unsigned int			flags_general;
+	const u8			(*ostd)[SMI_LARB_PORT_NR_MAX];
 };
 
 struct mtk_smi {
@@ -224,12 +240,26 @@ static void mtk_smi_larb_config_port_mt8173(struct device *dev)
 static void mtk_smi_larb_config_port_gen2_general(struct device *dev)
 {
 	struct mtk_smi_larb *larb = dev_get_drvdata(dev);
-	u32 reg;
+	u32 reg, flags_general = larb->larb_gen->flags_general;
+	const u8 *larbostd = larb->larb_gen->ostd[larb->larbid];
 	int i;
 
 	if (BIT(larb->larbid) & larb->larb_gen->larb_direct_to_common_mask)
 		return;
 
+	if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_THRT_UPDATE)) {
+		reg = readl_relaxed(larb->base + SMI_LARB_CMD_THRT_CON);
+		reg &= ~SMI_LARB_THRT_RD_NU_LMT_MSK;
+		reg |= SMI_LARB_THRT_RD_NU_LMT;
+		writel_relaxed(reg, larb->base + SMI_LARB_CMD_THRT_CON);
+	}
+
+	if (MTK_SMI_CAPS(flags_general, MTK_SMI_FLAG_SW_FLAG))
+		writel_relaxed(SMI_LARB_SW_FLAG_1, larb->base + SMI_LARB_SW_FLAG);
+
+	for (i = 0; i < SMI_LARB_PORT_NR_MAX && larbostd && !!larbostd[i]; i++)
+		writel_relaxed(larbostd[i], larb->base + SMI_LARB_OSTDL_PORTx(i));
+
 	for_each_set_bit(i, (unsigned long *)larb->mmu, 32) {
 		reg = readl_relaxed(larb->base + SMI_LARB_NONSEC_CON(i));
 		reg |= F_MMU_EN;
@@ -238,6 +268,51 @@ static void mtk_smi_larb_config_port_gen2_general(struct device *dev)
 	}
 }
 
+static const u8 mtk_smi_larb_mt8195_ostd[][SMI_LARB_PORT_NR_MAX] = {
+	[0] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb0 */
+	[1] = {0x0a, 0xc, 0x22, 0x22, 0x01, 0x0a,}, /* larb1 */
+	[2] = {0x12, 0x12, 0x12, 0x12, 0x0a,},      /* ... */
+	[3] = {0x12, 0x12, 0x12, 0x12, 0x28, 0x28, 0x0a,},
+	[4] = {0x06, 0x01, 0x17, 0x06, 0x0a,},
+	[5] = {0x06, 0x01, 0x17, 0x06, 0x06, 0x01, 0x06, 0x0a,},
+	[6] = {0x06, 0x01, 0x06, 0x0a,},
+	[7] = {0x0c, 0x0c, 0x12,},
+	[8] = {0x0c, 0x0c, 0x12,},
+	[9] = {0x0a, 0x08, 0x04, 0x06, 0x01, 0x01, 0x10, 0x18, 0x11, 0x0a,
+		0x08, 0x04, 0x11, 0x06, 0x02, 0x06, 0x01, 0x11, 0x11, 0x06,},
+	[10] = {0x18, 0x08, 0x01, 0x01, 0x20, 0x12, 0x18, 0x06, 0x05, 0x10,
+		0x08, 0x08, 0x10, 0x08, 0x08, 0x18, 0x0c, 0x09, 0x0b, 0x0d,
+		0x0d, 0x06, 0x10, 0x10,},
+	[11] = {0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x0e, 0x01, 0x01, 0x01, 0x01,},
+	[12] = {0x09, 0x09, 0x05, 0x05, 0x0c, 0x18, 0x02, 0x02, 0x04, 0x02,},
+	[13] = {0x02, 0x02, 0x12, 0x12, 0x02, 0x02, 0x02, 0x02, 0x08, 0x01,},
+	[14] = {0x12, 0x12, 0x02, 0x02, 0x02, 0x02, 0x16, 0x01, 0x16, 0x01,
+		0x01, 0x02, 0x02, 0x08, 0x02,},
+	[15] = {},
+	[16] = {0x28, 0x02, 0x02, 0x12, 0x02, 0x12, 0x10, 0x02, 0x02, 0x0a,
+		0x12, 0x02, 0x0a, 0x16, 0x02, 0x04,},
+	[17] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
+	[18] = {0x12, 0x06, 0x12, 0x06,},
+	[19] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
+		0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
+		0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
+	[20] = {0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x04, 0x01,
+		0x01, 0x01, 0x04, 0x0a, 0x06, 0x01, 0x01, 0x01, 0x0a, 0x06,
+		0x01, 0x01, 0x05, 0x03, 0x03, 0x04, 0x01,},
+	[21] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,},
+	[22] = {0x28, 0x19, 0x0c, 0x01, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04,},
+	[23] = {0x18, 0x01,},
+	[24] = {0x01, 0x01, 0x04, 0x01, 0x01, 0x01, 0x01, 0x01, 0x04, 0x01,
+		0x01, 0x01,},
+	[25] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
+		0x02, 0x01,},
+	[26] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
+		0x02, 0x01,},
+	[27] = {0x02, 0x02, 0x02, 0x28, 0x16, 0x02, 0x02, 0x02, 0x12, 0x16,
+		0x02, 0x01,},
+	[28] = {0x1a, 0x0e, 0x0a, 0x0a, 0x0c, 0x0e, 0x10,},
+};
+
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt2701 = {
 	.port_in_larb = {
 		LARB0_PORT_OFFSET, LARB1_PORT_OFFSET,
@@ -280,6 +355,8 @@ static const struct mtk_smi_larb_gen mtk_smi_larb_mt8192 = {
 
 static const struct mtk_smi_larb_gen mtk_smi_larb_mt8195 = {
 	.config_port                = mtk_smi_larb_config_port_gen2_general,
+	.flags_general	            = MTK_SMI_FLAG_THRT_UPDATE | MTK_SMI_FLAG_SW_FLAG,
+	.ostd		            = mtk_smi_larb_mt8195_ostd,
 };
 
 static const struct of_device_id mtk_smi_larb_of_ids[] = {
-- 
2.18.0

[PATCH v3 13/13] MAINTAINERS: Add entry for MediaTek SMI

[Yong Wu]

I am the author of MediaTek SMI driver, and will to maintain
and develop it further.
Add myself to cover these items.

Signed-off-by: Yong Wu <yong.wu@mediatek.com>
---
 MAINTAINERS | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index a61f4f3b78a9..91af55b45e80 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -11754,6 +11754,14 @@ M:	Sean Wang <sean.wang@mediatek.com>
 S:	Maintained
 F:	drivers/char/hw_random/mtk-rng.c
 
+MEDIATEK SMI DRIVER
+M:	Yong Wu <yong.wu@mediatek.com>
+L:	linux-mediatek@lists.infradead.org (moderated for non-subscribers)
+S:	Supported
+F:	Documentation/devicetree/bindings/memory-controllers/mediatek,smi*
+F:	drivers/memory/mtk-smi.c
+F:	include/soc/mediatek/smi.h
+
 MEDIATEK SWITCH DRIVER
 M:	Sean Wang <sean.wang@mediatek.com>
 M:	Landen Chao <Landen.Chao@mediatek.com>
-- 
2.18.0

Re: [PATCH v3 02/13] dt-bindings: memory: mediatek: Add mt8195 smi sub common

[Rob Herring]

On Tue, Aug 10, 2021 at 04:08:48PM +0800, Yong Wu wrote:
> Add the binding for smi-sub-common. The SMI block diagram like this:
> 
>         IOMMU
>          |  |
>       smi-common
>   ------------------
>   |      ....      |
>  larb0           larb7   <-max is 8
> 
> The smi-common connects with smi-larb and IOMMU. The maximum larbs number
> that connects with a smi-common is 8. If the engines number is over 8,
> sometimes we use a smi-sub-common which is nearly same with smi-common.
> It supports up to 8 input and 1 output(smi-common has 2 output)
> 
> Something like:
> 
>         IOMMU
>          |  |
>       smi-common
>   ---------------------
>   |      |          ...
> larb0  sub-common   ...   <-max is 8
>       -----------
>        |    |    ...   <-max is 8 too.
>      larb2 larb5
> 
> We don't need extra SW setting for smi-sub-common, only the sub-common has
> special clocks need to enable when the engines access dram.
> 
> If it is sub-common, it should have a "mediatek,smi" phandle to point to
> its smi-common. meanwhile the sub-common only has one gals clock.
> 
> Additionally, add a new property "mediatek,smi_sub_common" for this
> sub-common, this is needed in the IOMMU driver in which we create a device
> link between smi-common and the IOMMU device. If we add the smi-sub-common
> here, the IOMMU driver still need to find the smi-common device. thus,
> add this bool property to indicate if it is sub-common.
> 
> Signed-off-by: Yong Wu <yong.wu@mediatek.com>
> ---
> change note:
> a. change mediatek, smi type from phandle-array to phandle from Rob.
> b. Add a new bool property (mediatek,smi_sub_common) to indicate this is
>    smi-sub-common. the reason is as above.
> ---
>  .../mediatek,smi-common.yaml                  | 30 +++++++++++++++++++
>  1 file changed, 30 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> index 602592b6c3f5..26bb9903864b 100644
> --- a/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> +++ b/Documentation/devicetree/bindings/memory-controllers/mediatek,smi-common.yaml
> @@ -38,6 +38,7 @@ properties:
>            - mediatek,mt8192-smi-common
>            - mediatek,mt8195-smi-common-vdo
>            - mediatek,mt8195-smi-common-vpp
> +          - mediatek,mt8195-smi-sub-common
>  
>        - description: for mt7623
>          items:
> @@ -67,6 +68,14 @@ properties:
>      minItems: 2
>      maxItems: 4
>  
> +  mediatek,smi:
> +    $ref: /schemas/types.yaml#/definitions/phandle
> +    description: a phandle to the smi-common node above. Only for sub-common.
> +
> +  mediatek,smi_sub_common:

s/_/-/

> +    type: boolean
> +    description: Indicate if this is smi-sub-common.
> +
>  required:
>    - compatible
>    - reg
> @@ -93,6 +102,27 @@ allOf:
>              - const: smi
>              - const: async
>  
> +  - if:  # only for sub common
> +      properties:
> +        compatible:
> +          contains:
> +            enum:
> +              - mediatek,mt8195-smi-sub-common
> +    then:
> +      required:
> +        - mediatek,smi
> +        - mediatek,smi_sub_common
> +      properties:
> +        clock:
> +          items:
> +            minItems: 3
> +            maxItems: 3
> +        clock-names:
> +          items:
> +            - const: apb
> +            - const: smi
> +            - const: gals0

If not allowed for other compatibles, you need:

else:
  properties:
    mediatek,sni: false
    mediatek,smi_sub_common: false


> +
>    - if:  # for gen2 HW that have gals
>        properties:
>          compatible:
> -- 
> 2.18.0
> 
> 

Re: [PATCH v3 00/13] MT8195 SMI support

[Krzysztof Kozlowski]

On 10/08/2021 10:08, Yong Wu wrote:
> This patchset mainly adds SMI support for mt8195.
> 
> Comparing with the previous version, add two new functions:
> a) add smi sub common
> b) add initial setting for smi-common and smi-larb.
> 
> Change note:
> v3:1) In the dt-binding:
>        a. Change mediatek,smi type from phandle-array to phandle from Rob.
>        b. Add a new bool property (mediatek,smi_sub_common)
>           to indicate if this is smi-sub-common.
>    2) Change the clock using bulk parting.
>       keep the smi-common's has_gals flag. more strict.
>    3) More comment about larb initial setting.
>    4) Add a maintain patch

The patchset looks good to me but I saw now comments from Rob, so I
expect a resend. Therefore there is also time for additional review -
maybe continued by Ikjoon Jang?

If you sent a v4 with fixes rather soon and get ack from Rob, I could
still try to get it into next merge window. After this weekend I won't
be taking patches for this cycle and it will wait for the merge window
to finish.


Best regards,
Krzysztof

Re: [PATCH v3 00/13] MT8195 SMI support

[Yong Wu (吴勇)]

On Wed, 2021-08-18 at 22:41 +0200, Krzysztof Kozlowski wrote:
> On 10/08/2021 10:08, Yong Wu wrote:
> > This patchset mainly adds SMI support for mt8195.
> > 
> > Comparing with the previous version, add two new functions:
> > a) add smi sub common
> > b) add initial setting for smi-common and smi-larb.
> > 
> > Change note:
> > v3:1) In the dt-binding:
> >        a. Change mediatek,smi type from phandle-array to phandle
> > from Rob.
> >        b. Add a new bool property (mediatek,smi_sub_common)
> >           to indicate if this is smi-sub-common.
> >    2) Change the clock using bulk parting.
> >       keep the smi-common's has_gals flag. more strict.
> >    3) More comment about larb initial setting.
> >    4) Add a maintain patch
> 
> The patchset looks good to me but I saw now comments from Rob, so I
> expect a resend. Therefore there is also time for additional review -
> maybe continued by Ikjoon Jang?
> 
> If you sent a v4 with fixes rather soon and get ack from Rob, I could
> still try to get it into next merge window. After this weekend I
> won't
> be taking patches for this cycle and it will wait for the merge
> window
> to finish.

Hi Krzysztof,

Thanks very much for your information.

It looks the time is too short to get Rob's ack in this weekend. I will
wait for one or two weeks to see if there is other comments, then
resend.

> 
> 
> Best regards,
> Krzysztof