From: Bjorn Andersson <bjorn.andersson@linaro.org>
To: David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Rob Herring <robh+dt@kernel.org>,
Andrzej Hajda <a.hajda@samsung.com>,
Neil Armstrong <narmstrong@baylibre.com>,
Laurent Pinchart <Laurent.pinchart@ideasonboard.com>,
Jonas Karlman <jonas@kwiboo.se>,
Jernej Skrabec <jernej.skrabec@siol.net>,
Douglas Anderson <dianders@chromium.org>
Cc: dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, linux-arm-msm@vger.kernel.org
Subject: [PATCH 1/2] dt-bindings: drm/bridge: ti-sn65dsi86: Replace #pwm-cells
Date: Wed, 30 Sep 2020 17:35:31 -0500 [thread overview]
Message-ID: <20200930223532.77755-2-bjorn.andersson@linaro.org> (raw)
In-Reply-To: <20200930223532.77755-1-bjorn.andersson@linaro.org>
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 <bjorn.andersson@linaro.org>
---
.../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
--
2.28.0
next prev parent reply other threads:[~2020-09-30 22:40 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-30 22:35 [PATCH 0/2] drm/bridge: ti-sn65dsi86: Support backlight controls Bjorn Andersson
2020-09-30 22:35 ` Bjorn Andersson [this message]
2020-09-30 23:06 ` [PATCH 1/2] dt-bindings: drm/bridge: ti-sn65dsi86: Replace #pwm-cells Steev Klimaszewski
2020-10-02 20:42 ` Doug Anderson
2020-11-02 17:08 ` Bjorn Andersson
2020-11-11 0:48 ` Doug Anderson
2020-10-05 13:50 ` Rob Herring
2020-09-30 22:35 ` [PATCH 2/2] drm/bridge: ti-sn65dsi86: Expose backlight controls Bjorn Andersson
2020-09-30 23:07 ` Steev Klimaszewski
2020-10-02 20:42 ` Doug Anderson
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