[1/2] dt-bindings: pwm: Add MediaTek PWM bindings

Submitted by John Crispin on Jan. 23, 2017, 6:34 p.m.

Details

Message ID 1485196477-669-1-git-send-email-john@phrozen.org
State Accepted
Headers show

Commit Message

John Crispin Jan. 23, 2017, 6:34 p.m.
Document the device-tree binding of MediaTek PWM. The PWM has 5 channels.
This has been tested on MT7623 only but should work on all the other MTK
SoCs that contain this core.

Signed-off-by: John Crispin <john@phrozen.org>
---
 .../devicetree/bindings/pwm/pwm-mediatek.txt       |   34 ++++++++++++++++++++
 1 file changed, 34 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/pwm/pwm-mediatek.txt

Comments

Rob Herring Jan. 27, 2017, 8:59 p.m.
On Mon, Jan 23, 2017 at 07:34:36PM +0100, John Crispin wrote:
> Document the device-tree binding of MediaTek PWM. The PWM has 5 channels.
> This has been tested on MT7623 only but should work on all the other MTK
> SoCs that contain this core.
> 
> Signed-off-by: John Crispin <john@phrozen.org>
> ---
>  .../devicetree/bindings/pwm/pwm-mediatek.txt       |   34 ++++++++++++++++++++
>  1 file changed, 34 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pwm/pwm-mediatek.txt

Acked-by: Rob Herring <robh@kernel.org>
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diff --git a/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
new file mode 100644
index 0000000..54c59b0
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/pwm-mediatek.txt
@@ -0,0 +1,34 @@ 
+MediaTek PWM controller
+
+Required properties:
+ - compatible: should be "mediatek,<name>-pwm":
+   - "mediatek,mt7623-pwm": found on mt7623 SoC.
+ - reg: physical base address and length of the controller's registers.
+ - #pwm-cells: must be 2. See pwm.txt in this directory for a description of
+   the cell format.
+ - clocks: phandle and clock specifier of the PWM reference clock.
+ - clock-names: must contain the following:
+   - "top": the top clock generator
+   - "main": clock used by the PWM core
+   - "pwm1-5": the five per PWM clocks
+ - pinctrl-names: Must contain a "default" entry.
+ - pinctrl-0: One property must exist for each entry in pinctrl-names.
+   See pinctrl/pinctrl-bindings.txt for details of the property values.
+
+Example:
+	pwm0: pwm@11006000 {
+		compatible = "mediatek,mt7623-pwm";
+		reg = <0 0x11006000 0 0x1000>;
+		#pwm-cells = <2>;
+		clocks = <&topckgen CLK_TOP_PWM_SEL>,
+			 <&pericfg CLK_PERI_PWM>,
+			 <&pericfg CLK_PERI_PWM1>,
+			 <&pericfg CLK_PERI_PWM2>,
+			 <&pericfg CLK_PERI_PWM3>,
+			 <&pericfg CLK_PERI_PWM4>,
+			 <&pericfg CLK_PERI_PWM5>;
+		clock-names = "top", "main", "pwm1", "pwm2",
+			      "pwm3", "pwm4", "pwm5";
+		pinctrl-names = "default";
+		pinctrl-0 = <&pwm0_pins>;
+	};