diff options
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/gpio/gpio-fan.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/gpio/gpio-fan.txt')
-rw-r--r-- | kernel/Documentation/devicetree/bindings/gpio/gpio-fan.txt | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/kernel/Documentation/devicetree/bindings/gpio/gpio-fan.txt b/kernel/Documentation/devicetree/bindings/gpio/gpio-fan.txt new file mode 100644 index 000000000..439a7430f --- /dev/null +++ b/kernel/Documentation/devicetree/bindings/gpio/gpio-fan.txt @@ -0,0 +1,40 @@ +Bindings for fan connected to GPIO lines + +Required properties: +- compatible : "gpio-fan" + +Optional properties: +- gpios: Specifies the pins that map to bits in the control value, + ordered MSB-->LSB. +- gpio-fan,speed-map: A mapping of possible fan RPM speeds and the + control value that should be set to achieve them. This array + must have the RPM values in ascending order. +- alarm-gpios: This pin going active indicates something is wrong with + the fan, and a udev event will be fired. +- cooling-cells: If used as a cooling device, must be <2> + Also see: Documentation/devicetree/bindings/thermal/thermal.txt + min and max states are derived from the speed-map of the fan. + +Note: At least one the "gpios" or "alarm-gpios" properties must be set. + +Examples: + + gpio_fan { + compatible = "gpio-fan"; + gpios = <&gpio1 14 1 + &gpio1 13 1>; + gpio-fan,speed-map = <0 0 + 3000 1 + 6000 2>; + alarm-gpios = <&gpio1 15 1>; + }; + gpio_fan_cool: gpio_fan { + compatible = "gpio-fan"; + gpios = <&gpio2 14 1 + &gpio2 13 1>; + gpio-fan,speed-map = <0 0>, + <3000 1>, + <6000 2>; + alarm-gpios = <&gpio2 15 1>; + #cooling-cells = <2>; /* min followed by max */ + }; |