diff options
author | David Brown <davidb@codeaurora.org> | 2011-03-17 01:13:16 -0400 |
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committer | David Brown <davidb@codeaurora.org> | 2011-03-17 01:13:16 -0400 |
commit | 92c260f755c42337c550d8ac1f8ccd1b32bffb20 (patch) | |
tree | 6d04fefc1adeecabfb2b00c201e0db78fa2b5529 /Documentation/devicetree/bindings/gpio/led.txt | |
parent | 8e76a80960bf06c245160a484d5a363ca6b520bb (diff) | |
parent | 05e34754518b6a90d5c392790c032575fab12d66 (diff) |
Merge remote branch 'rmk/for-linus' into for-linus
* rmk/for-linus: (1557 commits)
ARM: 6806/1: irq: introduce entry and exit functions for chained handlers
ARM: 6781/1: Thumb-2: Work around buggy Thumb-2 short branch relocations in gas
ARM: 6747/1: P2V: Thumb2 support
ARM: 6798/1: aout-core: zero thread debug registers in a.out core dump
ARM: 6796/1: Footbridge: Fix I/O mappings for NOMMU mode
ARM: 6784/1: errata: no automatic Store Buffer drain on Cortex-A9
ARM: 6772/1: errata: possible fault MMU translations following an ASID switch
ARM: 6776/1: mach-ux500: activate fix for errata 753970
ARM: 6794/1: SPEAr: Append UL to device address macros.
ARM: 6793/1: SPEAr: Remove unused *_SIZE macros from spear*.h files
ARM: 6792/1: SPEAr: Replace SIZE macro's with SZ_4K macros
ARM: 6791/1: SPEAr3xx: Declare device structures after shirq code
ARM: 6790/1: SPEAr: Clock Framework: Rename usbd clock and align apb_clk entry
ARM: 6789/1: SPEAr3xx: Rename sdio to sdhci
ARM: 6788/1: SPEAr: Include mach/hardware.h instead of mach/spear.h
ARM: 6787/1: SPEAr: Reorder #includes in .h & .c files.
ARM: 6681/1: SPEAr: add debugfs support to clk API
ARM: 6703/1: SPEAr: update clk API support
ARM: 6679/1: SPEAr: make clk API functions more generic
ARM: 6737/1: SPEAr: formalized timer support
...
Conflicts:
arch/arm/mach-msm/board-msm7x27.c
arch/arm/mach-msm/board-msm7x30.c
arch/arm/mach-msm/board-qsd8x50.c
arch/arm/mach-msm/board-sapphire.c
arch/arm/mach-msm/include/mach/memory.h
Diffstat (limited to 'Documentation/devicetree/bindings/gpio/led.txt')
-rw-r--r-- | Documentation/devicetree/bindings/gpio/led.txt | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/gpio/led.txt b/Documentation/devicetree/bindings/gpio/led.txt new file mode 100644 index 000000000000..064db928c3c1 --- /dev/null +++ b/Documentation/devicetree/bindings/gpio/led.txt | |||
@@ -0,0 +1,58 @@ | |||
1 | LEDs connected to GPIO lines | ||
2 | |||
3 | Required properties: | ||
4 | - compatible : should be "gpio-leds". | ||
5 | |||
6 | Each LED is represented as a sub-node of the gpio-leds device. Each | ||
7 | node's name represents the name of the corresponding LED. | ||
8 | |||
9 | LED sub-node properties: | ||
10 | - gpios : Should specify the LED's GPIO, see "Specifying GPIO information | ||
11 | for devices" in Documentation/powerpc/booting-without-of.txt. Active | ||
12 | low LEDs should be indicated using flags in the GPIO specifier. | ||
13 | - label : (optional) The label for this LED. If omitted, the label is | ||
14 | taken from the node name (excluding the unit address). | ||
15 | - linux,default-trigger : (optional) This parameter, if present, is a | ||
16 | string defining the trigger assigned to the LED. Current triggers are: | ||
17 | "backlight" - LED will act as a back-light, controlled by the framebuffer | ||
18 | system | ||
19 | "default-on" - LED will turn on, but see "default-state" below | ||
20 | "heartbeat" - LED "double" flashes at a load average based rate | ||
21 | "ide-disk" - LED indicates disk activity | ||
22 | "timer" - LED flashes at a fixed, configurable rate | ||
23 | - default-state: (optional) The initial state of the LED. Valid | ||
24 | values are "on", "off", and "keep". If the LED is already on or off | ||
25 | and the default-state property is set the to same value, then no | ||
26 | glitch should be produced where the LED momentarily turns off (or | ||
27 | on). The "keep" setting will keep the LED at whatever its current | ||
28 | state is, without producing a glitch. The default is off if this | ||
29 | property is not present. | ||
30 | |||
31 | Examples: | ||
32 | |||
33 | leds { | ||
34 | compatible = "gpio-leds"; | ||
35 | hdd { | ||
36 | label = "IDE Activity"; | ||
37 | gpios = <&mcu_pio 0 1>; /* Active low */ | ||
38 | linux,default-trigger = "ide-disk"; | ||
39 | }; | ||
40 | |||
41 | fault { | ||
42 | gpios = <&mcu_pio 1 0>; | ||
43 | /* Keep LED on if BIOS detected hardware fault */ | ||
44 | default-state = "keep"; | ||
45 | }; | ||
46 | }; | ||
47 | |||
48 | run-control { | ||
49 | compatible = "gpio-leds"; | ||
50 | red { | ||
51 | gpios = <&mpc8572 6 0>; | ||
52 | default-state = "off"; | ||
53 | }; | ||
54 | green { | ||
55 | gpios = <&mpc8572 7 0>; | ||
56 | default-state = "on"; | ||
57 | }; | ||
58 | } | ||