[PATCH 0/3] Add pwm-cells on STM32 LPTimer

[PATCH 0/3] Add pwm-cells on STM32 LPTimer

[Fabrice Gasnier]

Add missing generic #pwm-cells on STM32 LPTimer to allow initialization
of channel, period and polarity.

Fabrice Gasnier (1):
  ARM: dts: stm32: update pwm-cells for LPTimer on stm32h743

Gerald Baeza (2):
  dt-bindings: pwm-stm32-lp: add #pwm-cells
  pwm: stm32: LPTimer: use 3 cells xlate

 Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt | 3 +++
 arch/arm/boot/dts/stm32h743.dtsi                       | 5 +++++
 drivers/pwm/pwm-stm32-lp.c                             | 2 ++
 3 files changed, 10 insertions(+)

-- 
1.9.1

[PATCH 1/3] dt-bindings: pwm-stm32-lp: add #pwm-cells

[Fabrice Gasnier]

From: Gerald Baeza <gerald.baeza@st.com>

STM32 Low-Power Timer supports generic 3 cells pwm to encode
PWM number, period and polarity.

Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
 Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt b/Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt
index f8338d1..bd23302 100644
--- a/Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt
+++ b/Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt
@@ -7,6 +7,8 @@ See ../mfd/stm32-lptimer.txt for details about the parent node.
 
 Required parameters:
 - compatible:		Must be "st,stm32-pwm-lp".
+- #pwm-cells:		Should be set to 3. This PWM chip uses the default 3 cells
+			bindings defined in pwm.txt.
 
 Optional properties:
 - pinctrl-names: 	Set to "default".
@@ -18,6 +20,7 @@ Example:
 		...
 		pwm {
 			compatible = "st,stm32-pwm-lp";
+			#pwm-cells = <3>;
 			pinctrl-names = "default";
 			pinctrl-0 = <&lppwm1_pins>;
 		};
-- 
1.9.1

[PATCH 2/3] pwm: stm32: LPTimer: use 3 cells xlate

[Fabrice Gasnier]

From: Gerald Baeza <gerald.baeza@st.com>

STM32 Low-Power Timer supports generic 3 cells pwm to encode
PWM number, period and polarity.

Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
 drivers/pwm/pwm-stm32-lp.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/pwm/pwm-stm32-lp.c b/drivers/pwm/pwm-stm32-lp.c
index 1ac9e43..346b7bd 100644
--- a/drivers/pwm/pwm-stm32-lp.c
+++ b/drivers/pwm/pwm-stm32-lp.c
@@ -203,6 +203,8 @@ static int stm32_pwm_lp_probe(struct platform_device *pdev)
 	priv->chip.dev = &pdev->dev;
 	priv->chip.ops = &stm32_pwm_lp_ops;
 	priv->chip.npwm = 1;
+	priv->chip.of_xlate = of_pwm_xlate_with_flags;
+	priv->chip.of_pwm_n_cells = 3;
 
 	ret = pwmchip_add(&priv->chip);
 	if (ret < 0)
-- 
1.9.1

[PATCH 3/3] ARM: dts: stm32: update pwm-cells for LPTimer on stm32h743

[Fabrice Gasnier]

LPTimer pwm cells should be updated to 3, to allow initialization of
channel, period and polarity.

Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
---
 arch/arm/boot/dts/stm32h743.dtsi | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/arch/arm/boot/dts/stm32h743.dtsi b/arch/arm/boot/dts/stm32h743.dtsi
index bbfcbac..40d7d76 100644
--- a/arch/arm/boot/dts/stm32h743.dtsi
+++ b/arch/arm/boot/dts/stm32h743.dtsi
@@ -85,6 +85,7 @@
 
 			pwm {
 				compatible = "st,stm32-pwm-lp";
+				#pwm-cells = <3>;
 				status = "disabled";
 			};
 
@@ -238,6 +239,7 @@
 
 			pwm {
 				compatible = "st,stm32-pwm-lp";
+				#pwm-cells = <3>;
 				status = "disabled";
 			};
 
@@ -264,6 +266,7 @@
 
 			pwm {
 				compatible = "st,stm32-pwm-lp";
+				#pwm-cells = <3>;
 				status = "disabled";
 			};
 
@@ -285,6 +288,7 @@
 
 			pwm {
 				compatible = "st,stm32-pwm-lp";
+				#pwm-cells = <3>;
 				status = "disabled";
 			};
 		};
@@ -300,6 +304,7 @@
 
 			pwm {
 				compatible = "st,stm32-pwm-lp";
+				#pwm-cells = <3>;
 				status = "disabled";
 			};
 		};
-- 
1.9.1

Re: [PATCH 1/3] dt-bindings: pwm-stm32-lp: add #pwm-cells

[Rob Herring]

On Thu, Feb 01, 2018 at 02:44:36PM +0100, Fabrice Gasnier wrote:
> From: Gerald Baeza <gerald.baeza@st.com>
> 
> STM32 Low-Power Timer supports generic 3 cells pwm to encode
> PWM number, period and polarity.
> 
> Signed-off-by: Gerald Baeza <gerald.baeza@st.com>
> Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com>
> ---
>  Documentation/devicetree/bindings/pwm/pwm-stm32-lp.txt | 3 +++
>  1 file changed, 3 insertions(+)

Reviewed-by: Rob Herring <robh@kernel.org>