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[RFKILL]: Add support for an rfkill LED.

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This adds a LED trigger.

Signed-off-by: Michael Buesch <mb@bu3sch.de>
Acked-by: Ivo van Doorn <IvDoorn@gmail.com>
Signed-off-by: John W. Linville <linville@tuxdriver.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Michael Buesch 2007-09-27 21:33:12 +02:00 committed by David S. Miller
parent 937a049dd9
commit 135900c182
3 changed files with 69 additions and 1 deletions
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21
include/linux/rfkill.h
View file

@ -26,6 +26,7 @@
#include <linux/list.h>
#include <linux/mutex.h>
#include <linux/device.h>
#include <linux/leds.h>
/**
* enum rfkill_type - type of rfkill switch.
@ -56,6 +57,7 @@ enum rfkill_state {
* @data: Pointer to the RF button drivers private data which will be
* passed along when toggling radio state.
* @toggle_radio(): Mandatory handler to control state of the radio.
* @led_trigger: A LED trigger for this button's LED.
* @dev: Device structure integrating the switch into device tree.
* @node: Used to place switch into list of all switches known to the
* the system.
@ -74,6 +76,10 @@ struct rfkill {
void *data;
int (*toggle_radio)(void *data, enum rfkill_state state);
#ifdef CONFIG_RFKILL_LEDS
struct led_trigger led_trigger;
#endif
struct device dev;
struct list_head node;
};
@ -84,4 +90,19 @@ void rfkill_free(struct rfkill *rfkill);
int rfkill_register(struct rfkill *rfkill);
void rfkill_unregister(struct rfkill *rfkill);
/**
* rfkill_get_led_name - Get the LED trigger name for the button's LED.
* This function might return a NULL pointer if registering of the
* LED trigger failed.
* Use this as "default_trigger" for the LED.
*/
static inline char *rfkill_get_led_name(struct rfkill *rfkill)
{
#ifdef CONFIG_RFKILL_LEDS
return (char *)(rfkill->led_trigger.name);
#else
return NULL;
#endif
}
#endif /* RFKILL_H */

7
net/rfkill/Kconfig
View file

@ -22,3 +22,10 @@ config RFKILL_INPUT
To compile this driver as a module, choose M here: the
module will be called rfkill-input.
# LED trigger support
config RFKILL_LEDS
bool
depends on RFKILL && LEDS_TRIGGERS
default y

42
net/rfkill/rfkill.c
View file

@ -37,6 +37,22 @@ static DEFINE_MUTEX(rfkill_mutex);
static enum rfkill_state rfkill_states[RFKILL_TYPE_MAX];
static void rfkill_led_trigger(struct rfkill *rfkill,
enum rfkill_state state)
{
#ifdef CONFIG_RFKILL_LEDS
struct led_trigger *led = &rfkill->led_trigger;
if (!led->name)
return;
if (state == RFKILL_STATE_OFF)
led_trigger_event(led, LED_OFF);
else
led_trigger_event(led, LED_FULL);
#endif /* CONFIG_RFKILL_LEDS */
}
static int rfkill_toggle_radio(struct rfkill *rfkill,
enum rfkill_state state)
{
@ -48,8 +64,10 @@ static int rfkill_toggle_radio(struct rfkill *rfkill,
if (state != rfkill->state) {
retval = rfkill->toggle_radio(rfkill->data, state);
if (!retval)
if (!retval) {
rfkill->state = state;
rfkill_led_trigger(rfkill, state);
}
}
mutex_unlock(&rfkill->mutex);
@ -328,6 +346,26 @@ void rfkill_free(struct rfkill *rfkill)
}
EXPORT_SYMBOL(rfkill_free);
static void rfkill_led_trigger_register(struct rfkill *rfkill)
{
#ifdef CONFIG_RFKILL_LEDS
int error;
rfkill->led_trigger.name = rfkill->dev.bus_id;
error = led_trigger_register(&rfkill->led_trigger);
if (error)
rfkill->led_trigger.name = NULL;
#endif /* CONFIG_RFKILL_LEDS */
}
static void rfkill_led_trigger_unregister(struct rfkill *rfkill)
{
#ifdef CONFIG_RFKILL_LEDS
if (rfkill->led_trigger.name)
led_trigger_unregister(&rfkill->led_trigger);
#endif
}
/**
* rfkill_register - Register a rfkill structure.
* @rfkill: rfkill structure to be registered
@ -357,6 +395,7 @@ int rfkill_register(struct rfkill *rfkill)
rfkill_remove_switch(rfkill);
return error;
}
rfkill_led_trigger_register(rfkill);
return 0;
}
@ -372,6 +411,7 @@ EXPORT_SYMBOL(rfkill_register);
*/
void rfkill_unregister(struct rfkill *rfkill)
{
rfkill_led_trigger_unregister(rfkill);
device_del(&rfkill->dev);
rfkill_remove_switch(rfkill);
put_device(&rfkill->dev);