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pwm: add DT bindings documentation for atmel-hlcdc-pwm driver

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The HLCDC IP available in some Atmel SoCs (i.e. at91sam9x5, at91sam9n12
or sama5d3 families for instance) provides 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@free-electrons.com>
Acked-by: Thierry Reding <thierry.reding@gmail.com>
Acked-by: Nicolas Ferre <nicolas.ferre@atmel.com>
Signed-off-by: Thierry Reding <thierry.reding@gmail.com>
This commit is contained in:
Boris Brezillon 2014-10-07 15:38:15 +02:00 committed by Thierry Reding
parent 2b4984bef4
commit 2899e12fc9
1 changed files with 29 additions and 0 deletions
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Documentation/devicetree/bindings/pwm/atmel-hlcdc-pwm.txt Normal file
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Device-Tree bindings for Atmel's HLCDC (High-end 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 pwm.txt in this directory.
Example:
hlcdc: hlcdc@f0030000 {
compatible = "atmel,sama5d3-hlcdc";
reg = <0xf0030000 0x2000>;
clocks = <&lcdc_clk>, <&lcdck>, <&clk32k>;
clock-names = "periph_clk","sys_clk", "slow_clk";
hlcdc_pwm: hlcdc-pwm {
compatible = "atmel,hlcdc-pwm";
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_lcd_pwm>;
#pwm-cells = <3>;
};
};