linux-kernel - Re: [PATCH v3 1/2] dt-bindings: pwm: add MediaTek display PWM bindings

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Date:	Thu, 2 Jul 2015 16:15:07 +0800
From:	Daniel Kurtz <djkurtz@...omium.org>
To:	YH Huang <yh.huang@...iatek.com>
Cc:	Matthias Brugger <matthias.bgg@...il.com>,
	Mark Rutland <mark.rutland@....com>,
	Thierry Reding <thierry.reding@...il.com>,
	Rob Herring <robh+dt@...nel.org>,
	Pawel Moll <pawel.moll@....com>, linux-pwm@...r.kernel.org,
	"open list:OPEN FIRMWARE AND..." <devicetree@...r.kernel.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	"linux-arm-kernel@...ts.infradead.org" 
	<linux-arm-kernel@...ts.infradead.org>,
	srv_heupstream <srv_heupstream@...iatek.com>,
	linux-mediatek@...ts.infradead.org,
	Sascha Hauer <kernel@...gutronix.de>,
	Yingjoe Chen <yingjoe.chen@...iatek.com>
Subject: Re: [PATCH v3 1/2] dt-bindings: pwm: add MediaTek display PWM bindings

On Mon, Jun 29, 2015 at 11:24 PM, YH Huang <yh.huang@...iatek.com> wrote:
> I am sorry for forgetting to remove Change-Id in [PATCH v3 1/2] and
> [PATCH v3 1/2].
>
> Regards,
> YH Huang
>
> On Mon, 2015-06-29 at 23:03 +0800, YH Huang wrote:
>> Document the device-tree binding of MediatTek display PWM.
>> The clock "main" and "mm" are used to generate PWM signals.
>> The PWM has one channel to control the backlight brightness for display.
>> It supports MT8173 and MT6595.
>>
>> Change-Id: I194ca88b4e4cd01a28b8701e07e86ea6941e5292
>> Signed-off-by: YH Huang <yh.huang@...iatek.com>
>> ---
>>  .../devicetree/bindings/pwm/pwm-mtk-disp.txt       | 24 ++++++++++++++++++++++
>>  1 file changed, 24 insertions(+)
>>  create mode 100644 Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt
>>
>> diff --git a/Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt b/Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt
>> new file mode 100644
>> index 0000000..355b755
>> --- /dev/null
>> +++ b/Documentation/devicetree/bindings/pwm/pwm-mtk-disp.txt
>> @@ -0,0 +1,24 @@
>> +MediaTek display PWM controller
>> +
>> +Required properties:
>> + - compatible: should be "mediatek,<name>-disp-pwm"
>> +   - "mediatek,mt8173-disp-pwm": found on mt8173 SoC
>> +   - "mediatek,mt6595-disp-pwm": found on mt6595 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
>> +   - "main": clock used to generate PWM signals
>> +   - "mm": sync signals from the modules of mmsys
>> +
>> +Example:
>> +     pwm0: pwm@...1e000 {
>> +             compatible = "mediatek,mt8173-disp-pwm",
>> +                          "mediatek,mt6595-disp-pwm";
>> +             reg = <0 0x1401e000 0 0x1000>;
>> +             #pwm-cells = <2>;
>> +             clocks = <&mmsys MM_DISP_PWM026M>,
>> +                      <&mmsys MM_DISP_PWM0MM>;

These should be CLK_MM_DISP...

Thanks!
-Dan

>> +             clock-names = "main", "mm";
>> +     };
>
>
> --
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