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[173.175.113.3]) by smtp.gmail.com with ESMTPSA id h14sm783171otl.0.2020.09.30.16.06.55 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Wed, 30 Sep 2020 16:06:56 -0700 (PDT) Subject: Re: [PATCH 1/2] dt-bindings: drm/bridge: ti-sn65dsi86: Replace #pwm-cells To: Bjorn Andersson , David Airlie , Daniel Vetter , Rob Herring , Andrzej Hajda , Neil Armstrong , Laurent Pinchart , Jonas Karlman , Jernej Skrabec , Douglas Anderson Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org References: <20200930223532.77755-1-bjorn.andersson@linaro.org> <20200930223532.77755-2-bjorn.andersson@linaro.org> From: Steev Klimaszewski Message-ID: <7ff13ed2-5fe4-01b5-d1d7-0916f0630196@kali.org> Date: Wed, 30 Sep 2020 18:06:55 -0500 User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.15; rv:68.0) Gecko/20100101 Thunderbird/68.12.0 MIME-Version: 1.0 In-Reply-To: <20200930223532.77755-2-bjorn.andersson@linaro.org> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Content-Language: en-US Precedence: bulk List-ID: X-Mailing-List: devicetree@vger.kernel.org On 9/30/20 5:35 PM, Bjorn Andersson wrote: > While the signal on GPIO4 to drive the backlight controller indeed is > pulse width modulated its purpose is specifically to control the > brightness of a backlight. > > Drop the #pwm-cells and instead expose a new property to configure the > granularity of the backlight PWM signal. > > Signed-off-by: Bjorn Andersson > --- > .../devicetree/bindings/display/bridge/ti,sn65dsi86.yaml | 9 ++++++--- > 1 file changed, 6 insertions(+), 3 deletions(-) > > diff --git a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml > index f8622bd0f61e..e380218b4646 100644 > --- a/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml > +++ b/Documentation/devicetree/bindings/display/bridge/ti,sn65dsi86.yaml > @@ -66,9 +66,12 @@ properties: > 1-based to match the datasheet. See ../../gpio/gpio.txt for more > information. > > - '#pwm-cells': > - const: 1 > - description: See ../../pwm/pwm.yaml for description of the cell formats. > + ti,backlight-scale: > + description: > + The granularity of brightness for the PWM signal provided on GPIO4, if > + this property is specified. > + minimum: 0 > + maximum: 65535 > > ports: > type: object Tested-By: Steev Klimaszewski