From: Boris BREZILLON <boris.brezillon@xxxxxxxxxxxxxxxxxx>
The HLCDC IP available in some Atmel SoCs (i.e. sam9x5i.e. at91sam9n12,
at91sam9x5 family or sama5d3 family) provide a PWM device.
The DT bindings used for this PWM device is following the default 3 cells
bindings described in Documentation/devicetree/bindings/pwm/pwm.txt.
Signed-off-by: Boris Brezillon <boris.brezillon@xxxxxxxxxxxxxxxxxx>
---
.../devicetree/bindings/pwm/atmel-hlcdc-pwm.txt | 55 ++++++++++++++++++++++
1 file changed, 55 insertions(+)
create mode 100644 Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt
diff --git a/Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt b/Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt
new file mode 100644
index 0000000..86ad3e2
--- /dev/null
+++ b/Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt
@@ -0,0 +1,55 @@
+Device-Tree bindings for Atmel's HLCDC (High LCD Controller) PWM driver
+
+The Atmel HLCDC PWM is subdevice of the HLCDC MFD device.
+See ../mfd/atmel-hlcdc.txt for more details.
+
+Required properties:
+ - compatible: value should be one of the following:
+ "atmel,hlcdc-pwm"
+ - pinctr-names: the pin control state names. Should contain "default".
+ - pinctrl-0: should contain the pinctrl states described by pinctrl
+ default.
+ - #pwm-cells: should be set to 3. This PWM chip use the default 3 cells
+ bindings defined in Documentation/devicetree/bindings/pwm/pwm.txt.
+ The first cell encodes the PWM id (0 is the only acceptable value here,
+ because the chip only provide one PWM).
+ The second cell encodes the PWM period in nanoseconds.
+ The third cell encodes the PWM flags (the only supported flag is
+ PWM_POLARITY_INVERTED)
+
+Example:
+
+ hlcdc: hlcdc@f0030000 {
+ compatible = "atmel,sama5d3-hlcdc";
+ reg = <0xf0030000 0x2000>;
+ clocks = <&lcdc_clk>, <&lcdck>, <&clk32k>;
+ clock-names = "periph_clk","sys_clk", "slow_clk";
+ status = "disabled";
+
+ hlcdc-display-controller {
+ compatible = "atmel,hlcdc-display-controller";
+ interrupts = <36 IRQ_TYPE_LEVEL_HIGH 0>;
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_lcd_base &pinctrl_lcd_rgb888>;
+ #address-cells = <1>;
+ #size-cells = <0>;
+
+ port@0 {
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0>;
+
+ hlcdc_panel_output: endpoint@0 {
+ reg = <0>;
+ remote-endpoint = <&panel_input>;
+ };
+ };
+ };
+
+ hlcdc_pwm: hlcdc-pwm {
+ compatible = "atmel,hlcdc-pwm";
+ pinctrl-names = "default";
+ pinctrl-0 = <&pinctrl_lcd_pwm>;
+ #pwm-cells = <3>;
+ };
+ };
--
1.9.1
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