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author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt')
-rw-r--r-- | kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt b/kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt new file mode 100644 index 000000000..7bd9d3b12 --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/pwm/pwm-lp3943.txt @@ -0,0 +1,58 @@ +TI/National Semiconductor LP3943 PWM controller + +Required properties: + - compatible: "ti,lp3943-pwm" + - #pwm-cells: Should be 2. See pwm.txt in this directory for a + description of the cells format. + Note that this hardware limits the period length to the + range 6250~1600000. + - ti,pwm0 or ti,pwm1: Output pin number(s) for PWM channel 0 or 1. + 0 = output 0 + 1 = output 1 + . + . + 15 = output 15 + +Example: +PWM 0 is for RGB LED brightness control +PWM 1 is for brightness control of LP8557 backlight device + +&i2c3 { + lp3943@60 { + compatible = "ti,lp3943"; + reg = <0x60>; + + /* + * PWM 0 : output 8, 9 and 10 + * PWM 1 : output 15 + */ + pwm3943: pwm { + compatible = "ti,lp3943-pwm"; + #pwm-cells = <2>; + ti,pwm0 = <8 9 10>; + ti,pwm1 = <15>; + }; + }; + +}; + +/* LEDs control with PWM 0 of LP3943 */ +pwmleds { + compatible = "pwm-leds"; + rgb { + label = "indi::rgb"; + pwms = <&pwm3943 0 10000>; + max-brightness = <255>; + }; +}; + +&i2c4 { + /* Backlight control with PWM 1 of LP3943 */ + backlight@2c { + compatible = "ti,lp8557"; + reg = <0x2c>; + + pwms = <&pwm3943 1 10000>; + pwm-names = "lp8557"; + }; +}; |