From: Enric Balletbo i Serra <enric.balletbo@collabora.com>
To: Daniel Thompson <daniel.thompson@linaro.org>,
Doug Anderson <dianders@google.com>, Pavel Machek <pavel@ucw.cz>,
Rob Herring <robh+dt@kernel.org>
Cc: Jingoo Han <jingoohan1@gmail.com>,
Richard Purdie <rpurdie@rpsys.net>,
Jacek Anaszewski <jacek.anaszewski@gmail.com>,
Brian Norris <briannorris@google.com>,
Guenter Roeck <groeck@google.com>,
Lee Jones <lee.jones@linaro.org>,
Alexandru Stan <amstan@google.com>,
linux-leds@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, kernel@collabora.com
Subject: [PATCH v3 4/4] dt-bindings: pwm-backlight: move brightness-levels to optional.
Date: Thu, 8 Feb 2018 12:30:32 +0100 [thread overview]
Message-ID: <20180208113032.27810-5-enric.balletbo@collabora.com> (raw)
In-Reply-To: <20180208113032.27810-1-enric.balletbo@collabora.com>
The patch 'backlight: pwm_bl: compute brightness of LED linearly to
human eye' introduced a default brightness-levels table that is used
when brightness-levels is not available in the dts. So move
brightness-levels and default-brightness-level to be optional.
Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
Reviewed-by: Rob Herring <robh@kernel.org>
Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
---
Changes since v2:
- Add Acked-by: Daniel Thompson <daniel.thompson@linaro.org>
Changes since v1:
- Fix a couple of typos as requested by Rob.
- s/availablel/available/
- s/move move/move/
- "so move..." should be a new sentence.
- Add Reviewed-by: Rob Herring <robh@kernel.org>
.../devicetree/bindings/leds/backlight/pwm-backlight.txt | 15 ++++++++-------
1 file changed, 8 insertions(+), 7 deletions(-)
diff --git a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt
index ce9b5746b774..64fa2fbd98c9 100644
--- a/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt
+++ b/Documentation/devicetree/bindings/leds/backlight/pwm-backlight.txt
@@ -3,13 +3,6 @@ pwm-backlight bindings
Required properties:
- compatible: "pwm-backlight"
- pwms: OF device-tree PWM specification (see PWM binding[0])
- - brightness-levels: Array of distinct brightness levels. Typically these
- are in the range from 0 to 255, but any range starting at 0 will do.
- The actual brightness level (PWM duty cycle) will be interpolated
- from these values. 0 means a 0% duty cycle (darkest/off), while the
- last value in the array represents a 100% duty cycle (brightest).
- - default-brightness-level: the default brightness level (index into the
- array defined by the "brightness-levels" property)
- power-supply: regulator for supply voltage
Optional properties:
@@ -21,6 +14,14 @@ Optional properties:
and enabling the backlight using GPIO.
- pwm-off-delay-ms: Delay in ms between disabling the backlight using GPIO
and setting PWM value to 0.
+ - brightness-levels: Array of distinct brightness levels. Typically these
+ are in the range from 0 to 255, but any range starting at
+ 0 will do. The actual brightness level (PWM duty cycle)
+ will be interpolated from these values. 0 means a 0% duty
+ cycle (darkest/off), while the last value in the array
+ represents a 100% duty cycle (brightest).
+ - default-brightness-level: The default brightness level (index into the
+ array defined by the "brightness-levels" property).
- num-interpolated-steps: Number of interpolated steps between each value
of brightness-levels table. This way a high
resolution pwm duty cycle can be used without
--
2.15.1
next prev parent reply other threads:[~2018-02-08 11:30 UTC|newest]
Thread overview: 30+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-02-08 11:30 [PATCH v3 0/4] backlight: pwm_bl: support linear interpolation and brightness to human eye Enric Balletbo i Serra
2018-02-08 11:30 ` [PATCH v3 1/4] backlight: pwm_bl: linear interpolation between brightness-levels Enric Balletbo i Serra
2018-04-06 15:46 ` Daniel Thompson
2018-02-08 11:30 ` [PATCH v3 2/4] dt-bindings: pwm-backlight: add a num-interpolation-steps property Enric Balletbo i Serra
2018-02-18 22:49 ` Rob Herring
2018-02-08 11:30 ` [PATCH v3 3/4] backlight: pwm_bl: compute brightness of LED linearly to human eye Enric Balletbo i Serra
2018-04-06 15:51 ` Daniel Thompson
2019-06-07 22:19 ` Matthias Kaehlcke
2019-06-08 21:02 ` Pavel Machek
2019-06-10 10:00 ` Enric Balletbo i Serra
2019-06-10 20:39 ` Matthias Kaehlcke
2019-06-10 21:02 ` Enric Balletbo i Serra
2019-06-10 21:54 ` Matthias Kaehlcke
2019-06-10 20:52 ` Matthias Kaehlcke
2019-06-11 10:49 ` Daniel Thompson
2019-06-11 16:55 ` Brian Norris
2019-06-11 22:30 ` Matthias Kaehlcke
2019-06-12 9:54 ` Pavel Machek
2019-06-12 11:03 ` Daniel Thompson
2019-06-12 19:26 ` Matthias Kaehlcke
2019-06-12 19:47 ` Daniel Thompson
2019-06-12 21:59 ` Matthias Kaehlcke
2019-06-17 13:01 ` Pavel Machek
2019-06-17 20:03 ` Matthias Kaehlcke
2018-02-08 11:30 ` Enric Balletbo i Serra [this message]
2018-03-19 16:04 ` [PATCH v3 0/4] backlight: pwm_bl: support linear interpolation and brightness " Enric Balletbo Serra
2018-03-20 11:22 ` Daniel Thompson
2018-03-20 12:13 ` Enric Balletbo Serra
2018-04-06 15:54 ` Daniel Thompson
2018-04-09 8:17 ` Lee Jones
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