[PATCH v3 0/4] clk: sunxi: mmc: Last bits of phase handling

[PATCH v3 0/4] clk: sunxi: mmc: Last bits of phase handling

[Maxime Ripard]

Hi,

These are the last patches of the serie converting the custom phase
API to the proper common clock framework API.

These patches have already been discussed in length, only the patch 1
is new and should ease the handling of our MMC clocks.

Thanks,
Maxime

Changes from v2:
  - Rebased on top of v3.19

Changes from v1:
  - Fixed memory leak when a phase clock registration fails
  - Moved the spinlock declaration
  - Updated the DT bindings docs


Maxime Ripard (4):
  clk: sunxi: Rework MMC phase clocks
  ARM: sunxi: dt: Add sample and output mmc clocks
  mmc: sunxi: Convert MMC driver to the standard clock phase API
  clk: sunxi: Remove custom phase function

 Documentation/devicetree/bindings/clock/sunxi.txt  |  13 +-
 .../devicetree/bindings/mmc/sunxi-mmc.txt          |   8 +-
 arch/arm/boot/dts/sun4i-a10.dtsi                   |  72 +++++++----
 arch/arm/boot/dts/sun5i-a10s.dtsi                  |  54 ++++++---
 arch/arm/boot/dts/sun5i-a13.dtsi                   |  44 +++++--
 arch/arm/boot/dts/sun6i-a31.dtsi                   |  72 +++++++----
 arch/arm/boot/dts/sun7i-a20.dtsi                   |  72 +++++++----
 arch/arm/boot/dts/sun8i-a23.dtsi                   |  54 ++++++---
 drivers/clk/sunxi/clk-mod0.c                       | 131 +++++++++++----------
 drivers/clk/sunxi/clk-sunxi.c                      |  37 ------
 drivers/mmc/host/sunxi-mmc.c                       |  73 ++++++++----
 include/linux/clk/sunxi.h                          |  22 ----
 12 files changed, 395 insertions(+), 257 deletions(-)
 delete mode 100644 include/linux/clk/sunxi.h

-- 
2.2.1

[PATCH v3 1/4] clk: sunxi: Rework MMC phase clocks

[Maxime Ripard]

Instead of having three different clocks for the main MMC clock and the two
phase sub-clocks, which involved having three different drivers sharing the
same register, rework it to have the same single driver registering three
different clocks.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Chen-Yu Tsai <wens@csie.org>
---
 Documentation/devicetree/bindings/clock/sunxi.txt |  13 ++-
 drivers/clk/sunxi/clk-mod0.c                      | 131 ++++++++++++----------
 2 files changed, 77 insertions(+), 67 deletions(-)

diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
index 9dc4f55a04ad..e4c42276c577 100644
--- a/Documentation/devicetree/bindings/clock/sunxi.txt
+++ b/Documentation/devicetree/bindings/clock/sunxi.txt
@@ -55,8 +55,7 @@ Required properties:
 	"allwinner,sun6i-a31-apb2-gates-clk" - for the APB2 gates on A31
 	"allwinner,sun8i-a23-apb2-gates-clk" - for the APB2 gates on A23
 	"allwinner,sun5i-a13-mbus-clk" - for the MBUS clock on A13
-	"allwinner,sun4i-a10-mmc-output-clk" - for the MMC output clock on A10
-	"allwinner,sun4i-a10-mmc-sample-clk" - for the MMC sample clock on A10
+	"allwinner,sun4i-a10-mmc-clk" - for the MMC clock
 	"allwinner,sun4i-a10-mod0-clk" - for the module 0 family of clocks
 	"allwinner,sun8i-a23-mbus-clk" - for the MBUS clock on A23
 	"allwinner,sun7i-a20-out-clk" - for the external output clocks
@@ -95,6 +94,10 @@ For "allwinner,sun6i-a31-pll6-clk", there are 2 outputs. The first output
 is the normal PLL6 output, or "pll6". The second output is rate doubled
 PLL6, or "pll6x2".
 
+The "allwinner,sun4i-a10-mmc-clk" has three different outputs: the
+main clock, with the ID 0, and the output and sample clocks, with the
+IDs 1 and 2, respectively.
+
 For example:
 
 osc24M: clk at 01c20050 {
@@ -138,11 +141,11 @@ cpu: cpu at 01c20054 {
 };
 
 mmc0_clk: clk at 01c20088 {
-	#clock-cells = <0>;
-	compatible = "allwinner,sun4i-mod0-clk";
+	#clock-cells = <1>;
+	compatible = "allwinner,sun4i-a10-mmc-clk";
 	reg = <0x01c20088 0x4>;
 	clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-	clock-output-names = "mmc0";
+	clock-output-names = "mmc0", "mmc0_output", "mmc0_sample";
 };
 
 mii_phy_tx_clk: clk at 2 {
diff --git a/drivers/clk/sunxi/clk-mod0.c b/drivers/clk/sunxi/clk-mod0.c
index bf8fcd8c940e..e37eb6fe19e8 100644
--- a/drivers/clk/sunxi/clk-mod0.c
+++ b/drivers/clk/sunxi/clk-mod0.c
@@ -152,14 +152,10 @@ static void __init sun5i_a13_mbus_setup(struct device_node *node)
 }
 CLK_OF_DECLARE(sun5i_a13_mbus, "allwinner,sun5i-a13-mbus-clk", sun5i_a13_mbus_setup);
 
-struct mmc_phase_data {
-	u8	offset;
-};
-
 struct mmc_phase {
 	struct clk_hw		hw;
+	u8			offset;
 	void __iomem		*reg;
-	struct mmc_phase_data	*data;
 	spinlock_t		*lock;
 };
 
@@ -175,7 +171,7 @@ static int mmc_get_phase(struct clk_hw *hw)
 	u8 delay;
 
 	value = readl(phase->reg);
-	delay = (value >> phase->data->offset) & 0x3;
+	delay = (value >> phase->offset) & 0x3;
 
 	if (!delay)
 		return 180;
@@ -263,8 +259,8 @@ static int mmc_set_phase(struct clk_hw *hw, int degrees)
 
 	spin_lock_irqsave(phase->lock, flags);
 	value = readl(phase->reg);
-	value &= ~GENMASK(phase->data->offset + 3, phase->data->offset);
-	value |= delay << phase->data->offset;
+	value &= ~GENMASK(phase->offset + 3, phase->offset);
+	value |= delay << phase->offset;
 	writel(value, phase->reg);
 	spin_unlock_irqrestore(phase->lock, flags);
 
@@ -276,66 +272,77 @@ static const struct clk_ops mmc_clk_ops = {
 	.set_phase	= mmc_set_phase,
 };
 
-static void __init sun4i_a10_mmc_phase_setup(struct device_node *node,
-					     struct mmc_phase_data *data)
-{
-	const char *parent_names[1] = { of_clk_get_parent_name(node, 0) };
-	struct clk_init_data init = {
-		.num_parents	= 1,
-		.parent_names	= parent_names,
-		.ops		= &mmc_clk_ops,
-	};
-
-	struct mmc_phase *phase;
-	struct clk *clk;
-
-	phase = kmalloc(sizeof(*phase), GFP_KERNEL);
-	if (!phase)
-		return;
-
-	phase->hw.init = &init;
+static DEFINE_SPINLOCK(sun4i_a10_mmc_lock);
 
-	phase->reg = of_iomap(node, 0);
-	if (!phase->reg)
-		goto err_free;
+static void __init sun4i_a10_mmc_setup(struct device_node *node)
+{
+	struct clk_onecell_data *clk_data;
+	const char *parent;
+	void __iomem *reg;
+	int i;
 
-	phase->data = data;
-	phase->lock = &sun4i_a10_mod0_lock;
+	reg = of_io_request_and_map(node, 0, of_node_full_name(node));
+	if (IS_ERR(reg)) {
+		pr_err("Couldn't map the %s clock registers\n", node->name);
+		return;
+	}
 
-	if (of_property_read_string(node, "clock-output-names", &init.name))
-		init.name = node->name;
+	clk_data = kmalloc(sizeof(*clk_data), GFP_KERNEL);
+	if (!clk_data)
+		return;
 
-	clk = clk_register(NULL, &phase->hw);
-	if (IS_ERR(clk))
-		goto err_unmap;
+	clk_data->clks = kcalloc(3, sizeof(*clk_data->clks), GFP_KERNEL);
+	if (!clk_data->clks)
+		goto err_free_data;
+
+	clk_data->clk_num = 3;
+	clk_data->clks[0] = sunxi_factors_register(node,
+						   &sun4i_a10_mod0_data,
+						   &sun4i_a10_mmc_lock, reg);
+	if (!clk_data->clks[0])
+		goto err_free_clks;
+
+	parent = __clk_get_name(clk_data->clks[0]);
+
+	for (i = 1; i < 3; i++) {
+		struct clk_init_data init = {
+			.num_parents	= 1,
+			.parent_names	= &parent,
+			.ops		= &mmc_clk_ops,
+		};
+		struct mmc_phase *phase;
+
+		phase = kmalloc(sizeof(*phase), GFP_KERNEL);
+		if (!phase)
+			continue;
+
+		phase->hw.init = &init;
+		phase->reg = reg;
+		phase->lock = &sun4i_a10_mmc_lock;
+
+		if (i == 1)
+			phase->offset = 8;
+		else
+			phase->offset = 20;
+
+		if (of_property_read_string_index(node, "clock-output-names",
+						  i, &init.name))
+			init.name = node->name;
+
+		clk_data->clks[i] = clk_register(NULL, &phase->hw);
+		if (IS_ERR(clk_data->clks[i])) {
+			kfree(phase);
+			continue;
+		}
+	}
 
-	of_clk_add_provider(node, of_clk_src_simple_get, clk);
+	of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
 
 	return;
 
-err_unmap:
-	iounmap(phase->reg);
-err_free:
-	kfree(phase);
-}
-
-
-static struct mmc_phase_data mmc_output_clk = {
-	.offset	= 8,
-};
-
-static struct mmc_phase_data mmc_sample_clk = {
-	.offset	= 20,
-};
-
-static void __init sun4i_a10_mmc_output_setup(struct device_node *node)
-{
-	sun4i_a10_mmc_phase_setup(node, &mmc_output_clk);
-}
-CLK_OF_DECLARE(sun4i_a10_mmc_output, "allwinner,sun4i-a10-mmc-output-clk", sun4i_a10_mmc_output_setup);
-
-static void __init sun4i_a10_mmc_sample_setup(struct device_node *node)
-{
-	sun4i_a10_mmc_phase_setup(node, &mmc_sample_clk);
+err_free_clks:
+	kfree(clk_data->clks);
+err_free_data:
+	kfree(clk_data);
 }
-CLK_OF_DECLARE(sun4i_a10_mmc_sample, "allwinner,sun4i-a10-mmc-sample-clk", sun4i_a10_mmc_sample_setup);
+CLK_OF_DECLARE(sun4i_a10_mmc, "allwinner,sun4i-a10-mmc-clk", sun4i_a10_mmc_setup);
-- 
2.2.1

[PATCH v3 1/4] clk: sunxi: Rework MMC phase clocks

[Mike Turquette]

Quoting Maxime Ripard (2015-01-11 12:00:54)
> Instead of having three different clocks for the main MMC clock and the two
> phase sub-clocks, which involved having three different drivers sharing the
> same register, rework it to have the same single driver registering three
> different clocks.
> 
> Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
> Reviewed-by: Chen-Yu Tsai <wens@csie.org>
> Tested-by: Chen-Yu Tsai <wens@csie.org>

Looks good to me.

Regards,
Mike

> ---
>  Documentation/devicetree/bindings/clock/sunxi.txt |  13 ++-
>  drivers/clk/sunxi/clk-mod0.c                      | 131 ++++++++++++----------
>  2 files changed, 77 insertions(+), 67 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/clock/sunxi.txt b/Documentation/devicetree/bindings/clock/sunxi.txt
> index 9dc4f55a04ad..e4c42276c577 100644
> --- a/Documentation/devicetree/bindings/clock/sunxi.txt
> +++ b/Documentation/devicetree/bindings/clock/sunxi.txt
> @@ -55,8 +55,7 @@ Required properties:
>         "allwinner,sun6i-a31-apb2-gates-clk" - for the APB2 gates on A31
>         "allwinner,sun8i-a23-apb2-gates-clk" - for the APB2 gates on A23
>         "allwinner,sun5i-a13-mbus-clk" - for the MBUS clock on A13
> -       "allwinner,sun4i-a10-mmc-output-clk" - for the MMC output clock on A10
> -       "allwinner,sun4i-a10-mmc-sample-clk" - for the MMC sample clock on A10
> +       "allwinner,sun4i-a10-mmc-clk" - for the MMC clock
>         "allwinner,sun4i-a10-mod0-clk" - for the module 0 family of clocks
>         "allwinner,sun8i-a23-mbus-clk" - for the MBUS clock on A23
>         "allwinner,sun7i-a20-out-clk" - for the external output clocks
> @@ -95,6 +94,10 @@ For "allwinner,sun6i-a31-pll6-clk", there are 2 outputs. The first output
>  is the normal PLL6 output, or "pll6". The second output is rate doubled
>  PLL6, or "pll6x2".
>  
> +The "allwinner,sun4i-a10-mmc-clk" has three different outputs: the
> +main clock, with the ID 0, and the output and sample clocks, with the
> +IDs 1 and 2, respectively.
> +
>  For example:
>  
>  osc24M: clk at 01c20050 {
> @@ -138,11 +141,11 @@ cpu: cpu at 01c20054 {
>  };
>  
>  mmc0_clk: clk at 01c20088 {
> -       #clock-cells = <0>;
> -       compatible = "allwinner,sun4i-mod0-clk";
> +       #clock-cells = <1>;
> +       compatible = "allwinner,sun4i-a10-mmc-clk";
>         reg = <0x01c20088 0x4>;
>         clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
> -       clock-output-names = "mmc0";
> +       clock-output-names = "mmc0", "mmc0_output", "mmc0_sample";
>  };
>  
>  mii_phy_tx_clk: clk at 2 {
> diff --git a/drivers/clk/sunxi/clk-mod0.c b/drivers/clk/sunxi/clk-mod0.c
> index bf8fcd8c940e..e37eb6fe19e8 100644
> --- a/drivers/clk/sunxi/clk-mod0.c
> +++ b/drivers/clk/sunxi/clk-mod0.c
> @@ -152,14 +152,10 @@ static void __init sun5i_a13_mbus_setup(struct device_node *node)
>  }
>  CLK_OF_DECLARE(sun5i_a13_mbus, "allwinner,sun5i-a13-mbus-clk", sun5i_a13_mbus_setup);
>  
> -struct mmc_phase_data {
> -       u8      offset;
> -};
> -
>  struct mmc_phase {
>         struct clk_hw           hw;
> +       u8                      offset;
>         void __iomem            *reg;
> -       struct mmc_phase_data   *data;
>         spinlock_t              *lock;
>  };
>  
> @@ -175,7 +171,7 @@ static int mmc_get_phase(struct clk_hw *hw)
>         u8 delay;
>  
>         value = readl(phase->reg);
> -       delay = (value >> phase->data->offset) & 0x3;
> +       delay = (value >> phase->offset) & 0x3;
>  
>         if (!delay)
>                 return 180;
> @@ -263,8 +259,8 @@ static int mmc_set_phase(struct clk_hw *hw, int degrees)
>  
>         spin_lock_irqsave(phase->lock, flags);
>         value = readl(phase->reg);
> -       value &= ~GENMASK(phase->data->offset + 3, phase->data->offset);
> -       value |= delay << phase->data->offset;
> +       value &= ~GENMASK(phase->offset + 3, phase->offset);
> +       value |= delay << phase->offset;
>         writel(value, phase->reg);
>         spin_unlock_irqrestore(phase->lock, flags);
>  
> @@ -276,66 +272,77 @@ static const struct clk_ops mmc_clk_ops = {
>         .set_phase      = mmc_set_phase,
>  };
>  
> -static void __init sun4i_a10_mmc_phase_setup(struct device_node *node,
> -                                            struct mmc_phase_data *data)
> -{
> -       const char *parent_names[1] = { of_clk_get_parent_name(node, 0) };
> -       struct clk_init_data init = {
> -               .num_parents    = 1,
> -               .parent_names   = parent_names,
> -               .ops            = &mmc_clk_ops,
> -       };
> -
> -       struct mmc_phase *phase;
> -       struct clk *clk;
> -
> -       phase = kmalloc(sizeof(*phase), GFP_KERNEL);
> -       if (!phase)
> -               return;
> -
> -       phase->hw.init = &init;
> +static DEFINE_SPINLOCK(sun4i_a10_mmc_lock);
>  
> -       phase->reg = of_iomap(node, 0);
> -       if (!phase->reg)
> -               goto err_free;
> +static void __init sun4i_a10_mmc_setup(struct device_node *node)
> +{
> +       struct clk_onecell_data *clk_data;
> +       const char *parent;
> +       void __iomem *reg;
> +       int i;
>  
> -       phase->data = data;
> -       phase->lock = &sun4i_a10_mod0_lock;
> +       reg = of_io_request_and_map(node, 0, of_node_full_name(node));
> +       if (IS_ERR(reg)) {
> +               pr_err("Couldn't map the %s clock registers\n", node->name);
> +               return;
> +       }
>  
> -       if (of_property_read_string(node, "clock-output-names", &init.name))
> -               init.name = node->name;
> +       clk_data = kmalloc(sizeof(*clk_data), GFP_KERNEL);
> +       if (!clk_data)
> +               return;
>  
> -       clk = clk_register(NULL, &phase->hw);
> -       if (IS_ERR(clk))
> -               goto err_unmap;
> +       clk_data->clks = kcalloc(3, sizeof(*clk_data->clks), GFP_KERNEL);
> +       if (!clk_data->clks)
> +               goto err_free_data;
> +
> +       clk_data->clk_num = 3;
> +       clk_data->clks[0] = sunxi_factors_register(node,
> +                                                  &sun4i_a10_mod0_data,
> +                                                  &sun4i_a10_mmc_lock, reg);
> +       if (!clk_data->clks[0])
> +               goto err_free_clks;
> +
> +       parent = __clk_get_name(clk_data->clks[0]);
> +
> +       for (i = 1; i < 3; i++) {
> +               struct clk_init_data init = {
> +                       .num_parents    = 1,
> +                       .parent_names   = &parent,
> +                       .ops            = &mmc_clk_ops,
> +               };
> +               struct mmc_phase *phase;
> +
> +               phase = kmalloc(sizeof(*phase), GFP_KERNEL);
> +               if (!phase)
> +                       continue;
> +
> +               phase->hw.init = &init;
> +               phase->reg = reg;
> +               phase->lock = &sun4i_a10_mmc_lock;
> +
> +               if (i == 1)
> +                       phase->offset = 8;
> +               else
> +                       phase->offset = 20;
> +
> +               if (of_property_read_string_index(node, "clock-output-names",
> +                                                 i, &init.name))
> +                       init.name = node->name;
> +
> +               clk_data->clks[i] = clk_register(NULL, &phase->hw);
> +               if (IS_ERR(clk_data->clks[i])) {
> +                       kfree(phase);
> +                       continue;
> +               }
> +       }
>  
> -       of_clk_add_provider(node, of_clk_src_simple_get, clk);
> +       of_clk_add_provider(node, of_clk_src_onecell_get, clk_data);
>  
>         return;
>  
> -err_unmap:
> -       iounmap(phase->reg);
> -err_free:
> -       kfree(phase);
> -}
> -
> -
> -static struct mmc_phase_data mmc_output_clk = {
> -       .offset = 8,
> -};
> -
> -static struct mmc_phase_data mmc_sample_clk = {
> -       .offset = 20,
> -};
> -
> -static void __init sun4i_a10_mmc_output_setup(struct device_node *node)
> -{
> -       sun4i_a10_mmc_phase_setup(node, &mmc_output_clk);
> -}
> -CLK_OF_DECLARE(sun4i_a10_mmc_output, "allwinner,sun4i-a10-mmc-output-clk", sun4i_a10_mmc_output_setup);
> -
> -static void __init sun4i_a10_mmc_sample_setup(struct device_node *node)
> -{
> -       sun4i_a10_mmc_phase_setup(node, &mmc_sample_clk);
> +err_free_clks:
> +       kfree(clk_data->clks);
> +err_free_data:
> +       kfree(clk_data);
>  }
> -CLK_OF_DECLARE(sun4i_a10_mmc_sample, "allwinner,sun4i-a10-mmc-sample-clk", sun4i_a10_mmc_sample_setup);
> +CLK_OF_DECLARE(sun4i_a10_mmc, "allwinner,sun4i-a10-mmc-clk", sun4i_a10_mmc_setup);
> -- 
> 2.2.1
> 

[PATCH v3 2/4] ARM: sunxi: dt: Add sample and output mmc clocks

[Maxime Ripard]

Add the sample and output clocks for the MMC phase support.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Chen-Yu Tsai <wens@csie.org>
---
 arch/arm/boot/dts/sun4i-a10.dtsi  | 72 ++++++++++++++++++++++++++++-----------
 arch/arm/boot/dts/sun5i-a10s.dtsi | 54 +++++++++++++++++++++--------
 arch/arm/boot/dts/sun5i-a13.dtsi  | 44 +++++++++++++++++-------
 arch/arm/boot/dts/sun6i-a31.dtsi  | 72 ++++++++++++++++++++++++++++-----------
 arch/arm/boot/dts/sun7i-a20.dtsi  | 72 ++++++++++++++++++++++++++++-----------
 arch/arm/boot/dts/sun8i-a23.dtsi  | 54 +++++++++++++++++++++--------
 6 files changed, 265 insertions(+), 103 deletions(-)

diff --git a/arch/arm/boot/dts/sun4i-a10.dtsi b/arch/arm/boot/dts/sun4i-a10.dtsi
index 7fb4e912f510..232030433eb7 100644
--- a/arch/arm/boot/dts/sun4i-a10.dtsi
+++ b/arch/arm/boot/dts/sun4i-a10.dtsi
@@ -242,35 +242,43 @@
 		};
 
 		mmc0_clk: clk at 01c20088 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20088 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc0";
+			clock-output-names = "mmc0",
+					     "mmc0_output",
+					     "mmc0_sample";
 		};
 
 		mmc1_clk: clk at 01c2008c {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c2008c 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc1";
+			clock-output-names = "mmc1",
+					     "mmc1_output",
+					     "mmc1_sample";
 		};
 
 		mmc2_clk: clk at 01c20090 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20090 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc2";
+			clock-output-names = "mmc2",
+					     "mmc2_output",
+					     "mmc2_sample";
 		};
 
 		mmc3_clk: clk at 01c20094 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20094 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc3";
+			clock-output-names = "mmc3",
+					     "mmc3_output",
+					     "mmc3_sample";
 		};
 
 		ts_clk: clk at 01c20098 {
@@ -416,8 +424,14 @@
 		mmc0: mmc at 01c0f000 {
 			compatible = "allwinner,sun4i-a10-mmc";
 			reg = <0x01c0f000 0x1000>;
-			clocks = <&ahb_gates 8>, <&mmc0_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 8>,
+				 <&mmc0_clk 0>,
+				 <&mmc0_clk 1>,
+				 <&mmc0_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <32>;
 			status = "disabled";
 		};
@@ -425,8 +439,14 @@
 		mmc1: mmc at 01c10000 {
 			compatible = "allwinner,sun4i-a10-mmc";
 			reg = <0x01c10000 0x1000>;
-			clocks = <&ahb_gates 9>, <&mmc1_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 9>,
+				 <&mmc1_clk 0>,
+				 <&mmc1_clk 1>,
+				 <&mmc1_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <33>;
 			status = "disabled";
 		};
@@ -434,8 +454,14 @@
 		mmc2: mmc at 01c11000 {
 			compatible = "allwinner,sun4i-a10-mmc";
 			reg = <0x01c11000 0x1000>;
-			clocks = <&ahb_gates 10>, <&mmc2_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 10>,
+				 <&mmc2_clk 0>,
+				 <&mmc2_clk 1>,
+				 <&mmc2_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <34>;
 			status = "disabled";
 		};
@@ -443,8 +469,14 @@
 		mmc3: mmc at 01c12000 {
 			compatible = "allwinner,sun4i-a10-mmc";
 			reg = <0x01c12000 0x1000>;
-			clocks = <&ahb_gates 11>, <&mmc3_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 11>,
+				 <&mmc3_clk 0>,
+				 <&mmc3_clk 1>,
+				 <&mmc3_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <35>;
 			status = "disabled";
 		};
diff --git a/arch/arm/boot/dts/sun5i-a10s.dtsi b/arch/arm/boot/dts/sun5i-a10s.dtsi
index 7ab6d32078b6..1cdc6860e66f 100644
--- a/arch/arm/boot/dts/sun5i-a10s.dtsi
+++ b/arch/arm/boot/dts/sun5i-a10s.dtsi
@@ -214,27 +214,33 @@
 		};
 
 		mmc0_clk: clk at 01c20088 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20088 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc0";
+			clock-output-names = "mmc0",
+					     "mmc0_output",
+					     "mmc0_sample";
 		};
 
 		mmc1_clk: clk at 01c2008c {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c2008c 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc1";
+			clock-output-names = "mmc1",
+					     "mmc1_output",
+					     "mmc1_sample";
 		};
 
 		mmc2_clk: clk at 01c20090 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20090 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc2";
+			clock-output-names = "mmc2",
+					     "mmc2_output",
+					     "mmc2_sample";
 		};
 
 		ts_clk: clk at 01c20098 {
@@ -364,8 +370,14 @@
 		mmc0: mmc at 01c0f000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c0f000 0x1000>;
-			clocks = <&ahb_gates 8>, <&mmc0_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 8>,
+				 <&mmc0_clk 0>,
+				 <&mmc0_clk 1>,
+				 <&mmc0_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <32>;
 			status = "disabled";
 		};
@@ -373,8 +385,14 @@
 		mmc1: mmc at 01c10000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c10000 0x1000>;
-			clocks = <&ahb_gates 9>, <&mmc1_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 9>,
+				 <&mmc1_clk 0>,
+				 <&mmc1_clk 1>,
+				 <&mmc1_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <33>;
 			status = "disabled";
 		};
@@ -382,8 +400,14 @@
 		mmc2: mmc at 01c11000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c11000 0x1000>;
-			clocks = <&ahb_gates 10>, <&mmc2_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 10>,
+				 <&mmc2_clk 0>,
+				 <&mmc2_clk 1>,
+				 <&mmc2_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <34>;
 			status = "disabled";
 		};
diff --git a/arch/arm/boot/dts/sun5i-a13.dtsi b/arch/arm/boot/dts/sun5i-a13.dtsi
index dee2aa5bc9ed..dbf1cdd976d4 100644
--- a/arch/arm/boot/dts/sun5i-a13.dtsi
+++ b/arch/arm/boot/dts/sun5i-a13.dtsi
@@ -214,27 +214,33 @@
 		};
 
 		mmc0_clk: clk at 01c20088 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20088 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc0";
+			clock-output-names = "mmc0",
+					     "mmc0_output",
+					     "mmc0_sample";
 		};
 
 		mmc1_clk: clk at 01c2008c {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c2008c 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc1";
+			clock-output-names = "mmc1",
+					     "mmc1_output",
+					     "mmc1_sample";
 		};
 
 		mmc2_clk: clk at 01c20090 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20090 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc2";
+			clock-output-names = "mmc2",
+					     "mmc2_output",
+					     "mmc2_sample";
 		};
 
 		ts_clk: clk at 01c20098 {
@@ -348,8 +354,14 @@
 		mmc0: mmc at 01c0f000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c0f000 0x1000>;
-			clocks = <&ahb_gates 8>, <&mmc0_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 8>,
+				 <&mmc0_clk 0>,
+				 <&mmc0_clk 1>,
+				 <&mmc0_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <32>;
 			status = "disabled";
 		};
@@ -357,8 +369,14 @@
 		mmc2: mmc at 01c11000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c11000 0x1000>;
-			clocks = <&ahb_gates 10>, <&mmc2_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 10>,
+				 <&mmc2_clk 0>,
+				 <&mmc2_clk 1>,
+				 <&mmc2_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <34>;
 			status = "disabled";
 		};
diff --git a/arch/arm/boot/dts/sun6i-a31.dtsi b/arch/arm/boot/dts/sun6i-a31.dtsi
index 69e5401df662..a51652258965 100644
--- a/arch/arm/boot/dts/sun6i-a31.dtsi
+++ b/arch/arm/boot/dts/sun6i-a31.dtsi
@@ -245,35 +245,43 @@
 		};
 
 		mmc0_clk: clk at 01c20088 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20088 0x4>;
 			clocks = <&osc24M>, <&pll6 0>;
-			clock-output-names = "mmc0";
+			clock-output-names = "mmc0",
+					     "mmc0_output",
+					     "mmc0_sample";
 		};
 
 		mmc1_clk: clk at 01c2008c {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c2008c 0x4>;
 			clocks = <&osc24M>, <&pll6 0>;
-			clock-output-names = "mmc1";
+			clock-output-names = "mmc1",
+					     "mmc1_output",
+					     "mmc1_sample";
 		};
 
 		mmc2_clk: clk at 01c20090 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20090 0x4>;
 			clocks = <&osc24M>, <&pll6 0>;
-			clock-output-names = "mmc2";
+			clock-output-names = "mmc2",
+					     "mmc2_output",
+					     "mmc2_sample";
 		};
 
 		mmc3_clk: clk at 01c20094 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20094 0x4>;
 			clocks = <&osc24M>, <&pll6 0>;
-			clock-output-names = "mmc3";
+			clock-output-names = "mmc3",
+					     "mmc3_output",
+					     "mmc3_sample";
 		};
 
 		spi0_clk: clk at 01c200a0 {
@@ -370,8 +378,14 @@
 		mmc0: mmc at 01c0f000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c0f000 0x1000>;
-			clocks = <&ahb1_gates 8>, <&mmc0_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb1_gates 8>,
+				 <&mmc0_clk 0>,
+				 <&mmc0_clk 1>,
+				 <&mmc0_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			resets = <&ahb1_rst 8>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
@@ -381,8 +395,14 @@
 		mmc1: mmc at 01c10000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c10000 0x1000>;
-			clocks = <&ahb1_gates 9>, <&mmc1_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb1_gates 9>,
+				 <&mmc1_clk 0>,
+				 <&mmc1_clk 1>,
+				 <&mmc1_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			resets = <&ahb1_rst 9>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
@@ -392,8 +412,14 @@
 		mmc2: mmc at 01c11000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c11000 0x1000>;
-			clocks = <&ahb1_gates 10>, <&mmc2_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb1_gates 10>,
+				 <&mmc2_clk 0>,
+				 <&mmc2_clk 1>,
+				 <&mmc2_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			resets = <&ahb1_rst 10>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
@@ -403,8 +429,14 @@
 		mmc3: mmc at 01c12000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c12000 0x1000>;
-			clocks = <&ahb1_gates 11>, <&mmc3_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb1_gates 11>,
+				 <&mmc3_clk 0>,
+				 <&mmc3_clk 1>,
+				 <&mmc3_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			resets = <&ahb1_rst 11>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 63 IRQ_TYPE_LEVEL_HIGH>;
diff --git a/arch/arm/boot/dts/sun7i-a20.dtsi b/arch/arm/boot/dts/sun7i-a20.dtsi
index c2e964939991..edab255d2137 100644
--- a/arch/arm/boot/dts/sun7i-a20.dtsi
+++ b/arch/arm/boot/dts/sun7i-a20.dtsi
@@ -295,35 +295,43 @@
 		};
 
 		mmc0_clk: clk at 01c20088 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20088 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc0";
+			clock-output-names = "mmc0",
+					     "mmc0_output",
+					     "mmc0_sample";
 		};
 
 		mmc1_clk: clk at 01c2008c {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c2008c 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc1";
+			clock-output-names = "mmc1",
+					     "mmc1_output",
+					     "mmc1_sample";
 		};
 
 		mmc2_clk: clk at 01c20090 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20090 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc2";
+			clock-output-names = "mmc2",
+					     "mmc2_output",
+					     "mmc2_sample";
 		};
 
 		mmc3_clk: clk at 01c20094 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20094 0x4>;
 			clocks = <&osc24M>, <&pll6 1>, <&pll5 1>;
-			clock-output-names = "mmc3";
+			clock-output-names = "mmc3",
+					     "mmc3_output",
+					     "mmc3_sample";
 		};
 
 		ts_clk: clk at 01c20098 {
@@ -541,8 +549,14 @@
 		mmc0: mmc at 01c0f000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c0f000 0x1000>;
-			clocks = <&ahb_gates 8>, <&mmc0_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 8>,
+				 <&mmc0_clk 0>,
+				 <&mmc0_clk 1>,
+				 <&mmc0_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <GIC_SPI 32 IRQ_TYPE_LEVEL_HIGH>;
 			status = "disabled";
 		};
@@ -550,8 +564,14 @@
 		mmc1: mmc at 01c10000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c10000 0x1000>;
-			clocks = <&ahb_gates 9>, <&mmc1_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 9>,
+				 <&mmc1_clk 0>,
+				 <&mmc1_clk 1>,
+				 <&mmc1_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <GIC_SPI 33 IRQ_TYPE_LEVEL_HIGH>;
 			status = "disabled";
 		};
@@ -559,8 +579,14 @@
 		mmc2: mmc at 01c11000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c11000 0x1000>;
-			clocks = <&ahb_gates 10>, <&mmc2_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 10>,
+				 <&mmc2_clk 0>,
+				 <&mmc2_clk 1>,
+				 <&mmc2_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <GIC_SPI 34 IRQ_TYPE_LEVEL_HIGH>;
 			status = "disabled";
 		};
@@ -568,8 +594,14 @@
 		mmc3: mmc at 01c12000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c12000 0x1000>;
-			clocks = <&ahb_gates 11>, <&mmc3_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb_gates 11>,
+				 <&mmc3_clk 0>,
+				 <&mmc3_clk 1>,
+				 <&mmc3_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			interrupts = <GIC_SPI 35 IRQ_TYPE_LEVEL_HIGH>;
 			status = "disabled";
 		};
diff --git a/arch/arm/boot/dts/sun8i-a23.dtsi b/arch/arm/boot/dts/sun8i-a23.dtsi
index e470dd5dbc70..f4cb33823b5b 100644
--- a/arch/arm/boot/dts/sun8i-a23.dtsi
+++ b/arch/arm/boot/dts/sun8i-a23.dtsi
@@ -213,27 +213,33 @@
 		};
 
 		mmc0_clk: clk at 01c20088 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20088 0x4>;
 			clocks = <&osc24M>, <&pll6 0>;
-			clock-output-names = "mmc0";
+			clock-output-names = "mmc0",
+					     "mmc0_output",
+					     "mmc0_sample";
 		};
 
 		mmc1_clk: clk at 01c2008c {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c2008c 0x4>;
 			clocks = <&osc24M>, <&pll6 0>;
-			clock-output-names = "mmc1";
+			clock-output-names = "mmc1",
+					     "mmc1_output",
+					     "mmc1_sample";
 		};
 
 		mmc2_clk: clk at 01c20090 {
-			#clock-cells = <0>;
-			compatible = "allwinner,sun4i-a10-mod0-clk";
+			#clock-cells = <1>;
+			compatible = "allwinner,sun4i-a10-mmc-clk";
 			reg = <0x01c20090 0x4>;
 			clocks = <&osc24M>, <&pll6 0>;
-			clock-output-names = "mmc2";
+			clock-output-names = "mmc2",
+					     "mmc2_output",
+					     "mmc2_sample";
 		};
 
 		mbus_clk: clk at 01c2015c {
@@ -263,8 +269,14 @@
 		mmc0: mmc at 01c0f000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c0f000 0x1000>;
-			clocks = <&ahb1_gates 8>, <&mmc0_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb1_gates 8>,
+				 <&mmc0_clk 0>,
+				 <&mmc0_clk 1>,
+				 <&mmc0_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			resets = <&ahb1_rst 8>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 60 IRQ_TYPE_LEVEL_HIGH>;
@@ -274,8 +286,14 @@
 		mmc1: mmc at 01c10000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c10000 0x1000>;
-			clocks = <&ahb1_gates 9>, <&mmc1_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb1_gates 9>,
+				 <&mmc1_clk 0>,
+				 <&mmc1_clk 1>,
+				 <&mmc1_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			resets = <&ahb1_rst 9>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 61 IRQ_TYPE_LEVEL_HIGH>;
@@ -285,8 +303,14 @@
 		mmc2: mmc at 01c11000 {
 			compatible = "allwinner,sun5i-a13-mmc";
 			reg = <0x01c11000 0x1000>;
-			clocks = <&ahb1_gates 10>, <&mmc2_clk>;
-			clock-names = "ahb", "mmc";
+			clocks = <&ahb1_gates 10>,
+				 <&mmc2_clk 0>,
+				 <&mmc2_clk 1>,
+				 <&mmc2_clk 2>;
+			clock-names = "ahb",
+				      "mmc",
+				      "output",
+				      "sample";
 			resets = <&ahb1_rst 10>;
 			reset-names = "ahb";
 			interrupts = <GIC_SPI 62 IRQ_TYPE_LEVEL_HIGH>;
-- 
2.2.1

[PATCH v3 3/4] mmc: sunxi: Convert MMC driver to the standard clock phase API

[Maxime Ripard]

Now that we have proper support to use the generic phase API in our clock
driver, switch the MMC driver to use it.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Acked-by: David Lanzend?rfer <david.lanzendoerfer@o2s.ch>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Chen-Yu Tsai <wens@csie.org>
---
 .../devicetree/bindings/mmc/sunxi-mmc.txt          |  8 +--
 drivers/mmc/host/sunxi-mmc.c                       | 73 +++++++++++++++-------
 2 files changed, 53 insertions(+), 28 deletions(-)

diff --git a/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt b/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt
index 91b3a3467150..4bf41d833804 100644
--- a/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt
+++ b/Documentation/devicetree/bindings/mmc/sunxi-mmc.txt
@@ -10,8 +10,8 @@ Absolute maximum transfer rate is 200MB/s
 Required properties:
  - compatible : "allwinner,sun4i-a10-mmc" or "allwinner,sun5i-a13-mmc"
  - reg : mmc controller base registers
- - clocks : a list with 2 phandle + clock specifier pairs
- - clock-names : must contain "ahb" and "mmc"
+ - clocks : a list with 4 phandle + clock specifier pairs
+ - clock-names : must contain "ahb", "mmc", "output" and "sample"
  - interrupts : mmc controller interrupt
 
 Optional properties:
@@ -25,8 +25,8 @@ Examples:
 	mmc0: mmc at 01c0f000 {
 		compatible = "allwinner,sun5i-a13-mmc";
 		reg = <0x01c0f000 0x1000>;
-		clocks = <&ahb_gates 8>, <&mmc0_clk>;
-		clock-names = "ahb", "mod";
+		clocks = <&ahb_gates 8>, <&mmc0_clk>, <&mmc0_output_clk>, <&mmc0_sample_clk>;
+		clock-names = "ahb", "mod", "output", "sample";
 		interrupts = <0 32 4>;
 		status = "disabled";
 	};
diff --git a/drivers/mmc/host/sunxi-mmc.c b/drivers/mmc/host/sunxi-mmc.c
index 15cb8b7ffc34..c9a6fc0eaa35 100644
--- a/drivers/mmc/host/sunxi-mmc.c
+++ b/drivers/mmc/host/sunxi-mmc.c
@@ -21,8 +21,6 @@
 #include <linux/err.h>
 
 #include <linux/clk.h>
-#include <linux/clk/sunxi.h>
-
 #include <linux/gpio.h>
 #include <linux/platform_device.h>
 #include <linux/spinlock.h>
@@ -229,6 +227,8 @@ struct sunxi_mmc_host {
 	/* clock management */
 	struct clk	*clk_ahb;
 	struct clk	*clk_mmc;
+	struct clk	*clk_sample;
+	struct clk	*clk_output;
 
 	/* irq */
 	spinlock_t	lock;
@@ -616,7 +616,7 @@ static int sunxi_mmc_oclk_onoff(struct sunxi_mmc_host *host, u32 oclk_en)
 static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host,
 				  struct mmc_ios *ios)
 {
-	u32 rate, oclk_dly, rval, sclk_dly, src_clk;
+	u32 rate, oclk_dly, rval, sclk_dly;
 	int ret;
 
 	rate = clk_round_rate(host->clk_mmc, ios->clock);
@@ -642,34 +642,31 @@ static int sunxi_mmc_clk_set_rate(struct sunxi_mmc_host *host,
 
 	/* determine delays */
 	if (rate <= 400000) {
-		oclk_dly = 0;
-		sclk_dly = 7;
+		oclk_dly = 180;
+		sclk_dly = 42;
 	} else if (rate <= 25000000) {
-		oclk_dly = 0;
-		sclk_dly = 5;
+		oclk_dly = 180;
+		sclk_dly = 75;
 	} else if (rate <= 50000000) {
 		if (ios->timing == MMC_TIMING_UHS_DDR50) {
-			oclk_dly = 2;
-			sclk_dly = 4;
+			oclk_dly = 60;
+			sclk_dly = 120;
 		} else {
-			oclk_dly = 3;
-			sclk_dly = 5;
+			oclk_dly = 90;
+			sclk_dly = 150;
 		}
+	} else if (rate <= 100000000) {
+		oclk_dly = 6;
+		sclk_dly = 24;
+	} else if (rate <= 200000000) {
+		oclk_dly = 3;
+		sclk_dly = 12;
 	} else {
-		/* rate > 50000000 */
-		oclk_dly = 2;
-		sclk_dly = 4;
-	}
-
-	src_clk = clk_get_rate(clk_get_parent(host->clk_mmc));
-	if (src_clk >= 300000000 && src_clk <= 400000000) {
-		if (oclk_dly)
-			oclk_dly--;
-		if (sclk_dly)
-			sclk_dly--;
+		return -EINVAL;
 	}
 
-	clk_sunxi_mmc_phase_control(host->clk_mmc, sclk_dly, oclk_dly);
+	clk_set_phase(host->clk_sample, sclk_dly);
+	clk_set_phase(host->clk_output, oclk_dly);
 
 	return sunxi_mmc_oclk_onoff(host, 1);
 }
@@ -908,6 +905,18 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
 		return PTR_ERR(host->clk_mmc);
 	}
 
+	host->clk_output = devm_clk_get(&pdev->dev, "output");
+	if (IS_ERR(host->clk_output)) {
+		dev_err(&pdev->dev, "Could not get output clock\n");
+		return PTR_ERR(host->clk_output);
+	}
+
+	host->clk_sample = devm_clk_get(&pdev->dev, "sample");
+	if (IS_ERR(host->clk_sample)) {
+		dev_err(&pdev->dev, "Could not get sample clock\n");
+		return PTR_ERR(host->clk_sample);
+	}
+
 	host->reset = devm_reset_control_get(&pdev->dev, "ahb");
 
 	ret = clk_prepare_enable(host->clk_ahb);
@@ -922,11 +931,23 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
 		goto error_disable_clk_ahb;
 	}
 
+	ret = clk_prepare_enable(host->clk_output);
+	if (ret) {
+		dev_err(&pdev->dev, "Enable output clk err %d\n", ret);
+		goto error_disable_clk_mmc;
+	}
+
+	ret = clk_prepare_enable(host->clk_sample);
+	if (ret) {
+		dev_err(&pdev->dev, "Enable sample clk err %d\n", ret);
+		goto error_disable_clk_output;
+	}
+
 	if (!IS_ERR(host->reset)) {
 		ret = reset_control_deassert(host->reset);
 		if (ret) {
 			dev_err(&pdev->dev, "reset err %d\n", ret);
-			goto error_disable_clk_mmc;
+			goto error_disable_clk_sample;
 		}
 	}
 
@@ -945,6 +966,10 @@ static int sunxi_mmc_resource_request(struct sunxi_mmc_host *host,
 error_assert_reset:
 	if (!IS_ERR(host->reset))
 		reset_control_assert(host->reset);
+error_disable_clk_sample:
+	clk_disable_unprepare(host->clk_sample);
+error_disable_clk_output:
+	clk_disable_unprepare(host->clk_output);
 error_disable_clk_mmc:
 	clk_disable_unprepare(host->clk_mmc);
 error_disable_clk_ahb:
-- 
2.2.1

[PATCH v3 4/4] clk: sunxi: Remove custom phase function

[Maxime Ripard]

Now that we don't have any user left for our custom phase function, we can
safely remove this hack from the code.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Chen-Yu Tsai <wens@csie.org>
---
 drivers/clk/sunxi/clk-sunxi.c | 37 -------------------------------------
 include/linux/clk/sunxi.h     | 22 ----------------------
 2 files changed, 59 deletions(-)
 delete mode 100644 include/linux/clk/sunxi.h

diff --git a/drivers/clk/sunxi/clk-sunxi.c b/drivers/clk/sunxi/clk-sunxi.c
index df18a2af33ad..24c7cc12e9e1 100644
--- a/drivers/clk/sunxi/clk-sunxi.c
+++ b/drivers/clk/sunxi/clk-sunxi.c
@@ -563,43 +563,6 @@ static void sun7i_a20_get_out_factors(u32 *freq, u32 parent_rate,
 }
 
 /**
- * clk_sunxi_mmc_phase_control() - configures MMC clock phase control
- */
-
-void clk_sunxi_mmc_phase_control(struct clk *clk, u8 sample, u8 output)
-{
-	#define to_clk_composite(_hw) container_of(_hw, struct clk_composite, hw)
-	#define to_clk_factors(_hw) container_of(_hw, struct clk_factors, hw)
-
-	struct clk_hw *hw = __clk_get_hw(clk);
-	struct clk_composite *composite = to_clk_composite(hw);
-	struct clk_hw *rate_hw = composite->rate_hw;
-	struct clk_factors *factors = to_clk_factors(rate_hw);
-	unsigned long flags = 0;
-	u32 reg;
-
-	if (factors->lock)
-		spin_lock_irqsave(factors->lock, flags);
-
-	reg = readl(factors->reg);
-
-	/* set sample clock phase control */
-	reg &= ~(0x7 << 20);
-	reg |= ((sample & 0x7) << 20);
-
-	/* set output clock phase control */
-	reg &= ~(0x7 << 8);
-	reg |= ((output & 0x7) << 8);
-
-	writel(reg, factors->reg);
-
-	if (factors->lock)
-		spin_unlock_irqrestore(factors->lock, flags);
-}
-EXPORT_SYMBOL(clk_sunxi_mmc_phase_control);
-
-
-/**
  * sunxi_factors_clk_setup() - Setup function for factor clocks
  */
 
diff --git a/include/linux/clk/sunxi.h b/include/linux/clk/sunxi.h
deleted file mode 100644
index aed28c4451d9..000000000000
--- a/include/linux/clk/sunxi.h
+++ /dev/null
@@ -1,22 +0,0 @@
-/*
- * Copyright 2013 - Hans de Goede <hdegoede@redhat.com>
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- */
-
-#ifndef __LINUX_CLK_SUNXI_H_
-#define __LINUX_CLK_SUNXI_H_
-
-#include <linux/clk.h>
-
-void clk_sunxi_mmc_phase_control(struct clk *clk, u8 sample, u8 output);
-
-#endif
-- 
2.2.1

[PATCH v3 0/4] clk: sunxi: mmc: Last bits of phase handling

[Maxime Ripard]

On Sun, Jan 11, 2015 at 09:00:53PM +0100, Maxime Ripard wrote:
> Hi,
> 
> These are the last patches of the serie converting the custom phase
> API to the proper common clock framework API.
> 
> These patches have already been discussed in length, only the patch 1
> is new and should ease the handling of our MMC clocks.
> 
> Thanks,
> Maxime

Merged the 4 patches with Mike's Acked-by on the first one.

Thanks!
Maxime

-- 
Maxime Ripard, Free Electrons
Embedded Linux, Kernel and Android engineering
http://free-electrons.com
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