On Mon, Aug 01, 2016 at 09:42:08AM +0800, Jian Yuan wrote:
> From: yuanjian <yuanjian12@xxxxxxxxxxxxx>
>
> Add pwm driver for HiSilicon BVT SOCs
>
> Reviewed-by: Jiancheng Xue <xuejiancheng@xxxxxxxxxxxxx>
> Signed-off-by: Jian Yuan <yuanjian12@xxxxxxxxxxxxx>
> ---
> .../devicetree/bindings/pwm/pwm-hibvt.txt | 18 ++
> drivers/pwm/Kconfig | 10 +
> drivers/pwm/Makefile | 1 +
> drivers/pwm/pwm-hibvt.c | 272 +++++++++++++++++++++
> 4 files changed, 301 insertions(+)
> create mode 100644 Documentation/devicetree/bindings/pwm/pwm-hibvt.txt
> create mode 100644 drivers/pwm/pwm-hibvt.c
>
> diff --git a/Documentation/devicetree/bindings/pwm/pwm-hibvt.txt b/Documentation/devicetree/bindings/pwm/pwm-hibvt.txt
> new file mode 100644
> index 0000000..4efd83e
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/pwm/pwm-hibvt.txt
> @@ -0,0 +1,18 @@
> +Hisilicon PWM controller
> +
> +Required properties:
> + - compatible: should be "hisilicon,hibvt-pwm" and one of the following:
> + "hisilicon,hi3516cv300-pwm".
I take it "hisilicon,hibvt-pwm" is the fallback entry.
It would be good to note that explicitly.
> + - reg: physical base address and length of the controller's registers.
> + - clocks: phandle and clock specifier of the PWM reference clock.
> + - resets: offset address and offset bit for reset or unreset of the controller.
> + - pwm-nums: pwm number of the controller.
This should be 'num-pwms'.
I assume this is the number of PWMs exposed by this controller. Is this
not probeable, or dicoverable based on the compatible string?
How does this vary in practice?
> +
> +Example:
> + pwm: pwm@12130000 {
> + compatible = "hisilicon,hibvt-pwm";
This is missing "hisilicon,hi3516cv300-pwm" as per the requirements of
the binding.
> + reg = <0x12130000 0x10000>;
> + clocks = <&crg_ctrl HI3516CV300_PWM_CLK>;
> + resets = <&crg_ctrl 0x38 0>;
> + pwm-nums = <4>;
> + };
Thanks,
Mark.
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