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authorBryan Wu <bryan.wu@canonical.com>2011-06-25 06:33:50 -0400
committerBryan Wu <bryan.wu@canonical.com>2012-07-31 09:23:31 -0400
commit8f88731d052d2b14f332249a9332690ac1b365ac (patch)
treeaf9704aab65f98b0942a2c61cd857b35dbf86457 /include/linux/leds.h
parent28a33cbc24e4256c143dce96c7d93bf423229f92 (diff)
led-triggers: create a trigger for CPU activity
Attempting to consolidate the ARM LED code, this removes the custom RealView LED trigger code to turn LEDs on and off in response to CPU activity and replace it with a standard trigger. (bryan.wu@canonical.com: It introduces several syscore stubs into this trigger. It also provides ledtrig_cpu trigger event stub in <linux/leds.h>. Although it was inspired by ARM work, it can be used in other arch.) Cc: Richard Purdie <rpurdie@rpsys.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Signed-off-by: Bryan Wu <bryan.wu@canonical.com> Reviewed-by: Jamie Iles <jamie@jamieiles.com> Tested-by: Jochen Friedrich <jochen@scram.de>
Diffstat (limited to 'include/linux/leds.h')
-rw-r--r--include/linux/leds.h16
1 files changed, 16 insertions, 0 deletions
diff --git a/include/linux/leds.h b/include/linux/leds.h
index 39eee41d8c6f..cd545580e069 100644
--- a/include/linux/leds.h
+++ b/include/linux/leds.h
@@ -212,4 +212,20 @@ struct gpio_led_platform_data {
212struct platform_device *gpio_led_register_device( 212struct platform_device *gpio_led_register_device(
213 int id, const struct gpio_led_platform_data *pdata); 213 int id, const struct gpio_led_platform_data *pdata);
214 214
215enum cpu_led_event {
216 CPU_LED_IDLE_START, /* CPU enters idle */
217 CPU_LED_IDLE_END, /* CPU idle ends */
218 CPU_LED_START, /* Machine starts, especially resume */
219 CPU_LED_STOP, /* Machine stops, especially suspend */
220 CPU_LED_HALTED, /* Machine shutdown */
221};
222#ifdef CONFIG_LEDS_TRIGGER_CPU
223extern void ledtrig_cpu(enum cpu_led_event evt);
224#else
225static inline void ledtrig_cpu(enum cpu_led_event evt)
226{
227 return;
228}
229#endif
230
215#endif /* __LINUX_LEDS_H_INCLUDED */ 231#endif /* __LINUX_LEDS_H_INCLUDED */