On 2016/11/17 7:55, Vladimir Zapolskiy wrote:
> On 11/16/2016 11:50 AM, Jian Yuan wrote:
>> From: yuanjian <yuanjian12@xxxxxxxxxxxxx>
>>
>> Add PWM driver for the PWM controller found on HiSilicon BVT SOCs, like Hi3519V100, Hi3516CV300, etc.
>> The PWM controller is primarily in charge of controlling P-Iris lens.
>>
>> Reviewed-by: Jiancheng Xue <xuejiancheng@xxxxxxxxxxxxx>
>> Signed-off-by: Jian Yuan <yuanjian12@xxxxxxxxxxxxx>
>> ---
>> Change Log:
>> v5:
>> remove the generic compatible string "hisilicon, hibvt-pwm".
>> v4:
>> Add #pwm-cells in the bindings document.
>> v3:
>> fixed issues pointed by thierry.
>> Add PWM compatible string for Hi3519V100.
>> Implement .apply() function which support atomic, instead of .enable()/.disable()/.config().
>> v2:
>> The number of PWMs is change to be probeable based on the compatible string.
>>
>> .../devicetree/bindings/pwm/pwm-hibvt.txt | 22 ++
>> drivers/pwm/Kconfig | 9 +
>> drivers/pwm/Makefile | 1 +
>> drivers/pwm/pwm-hibvt.c | 269 +++++++++++++++++++++
>> 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..fe63950
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pwm/pwm-hibvt.txt
>> @@ -0,0 +1,22 @@
>> +Hisilicon PWM controller
>> +
>> +Required properties:
>> +-compatible: should contain one SoC specific compatible string
>> + The SoC specific strings supported including:
>> + "hisilicon,hi3516cv300-pwm"
>> + "hisilicon,hi3519v100-pwm"
>> +- reg: physical base address and length of the controller's registers.
>> +- clocks: phandle and clock specifier of the PWM reference clock.
>> +- resets: phandle and reset specifier for the PWM controller reset.
>> +- #pwm-cells: Should be 2. See pwm.txt in this directory for a description of
>
> Since the controller has separate polarity control register, and
> the driver handles polarity settings, please test/change #pwm-cells
> set to 3. It is better to do it right now before someone wants
> to change number of cells in future and support polarity specified
> in DTB.
>
Goog advice. I would add it in next patch v6.
>> + the cells format.
>> +
>> +Example:
>> + pwm: pwm@12130000 {
>> +
>
> Remove empty line above.
>
Ok.
>> + compatible = "hisilicon,hi3516cv300-pwm";
>> + reg = <0x12130000 0x10000>;
>> + clocks = <&crg_ctrl HI3516CV300_PWM_CLK>;
>> + resets = <&crg_ctrl 0x38 0>;
>> + #pwm-cells = <2>;
>
> After tesing #pwm-cells = <3> don't forget to updated this line.
>
Got it.
Thanks,
Jian Yuan
>> + };
>
> --
> With best wishes,
> Vladimir
>
> .
>
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