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kestrel/leds/trigger: implement led trigger driver for group pwm #23

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kestrel/leds/trigger: implement led trigger driver for group pwm #23

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11 changes: 11 additions & 0 deletions drivers/leds/leds-pca963x.c
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Original file line number Diff line number Diff line change
Expand Up @@ -32,6 +32,7 @@
#include <linux/property.h>
#include <linux/slab.h>
#include <linux/of.h>
#include <linux/i2c-pca963x.h>

/* LED select registers determine the source that drives LED outputs */
#define PCA963X_LED_OFF 0x0 /* LED driver off */
Expand Down Expand Up @@ -371,6 +372,14 @@ static const struct of_device_id of_pca963x_match[] = {
};
MODULE_DEVICE_TABLE(of, of_pca963x_match);

static struct i2c_client *g_client;

struct i2c_client *i2c_get_pca963x_device(void)
{
return g_client;
}
EXPORT_SYMBOL_GPL(i2c_get_pca963x_device);

static int pca963x_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
Expand Down Expand Up @@ -398,6 +407,8 @@ static int pca963x_probe(struct i2c_client *client,
chip->chipdef = chipdef;
chip->client = client;

g_client = client;

/* Turn off LEDs by default*/
for (i = 0; i < chipdef->n_leds / 4; i++)
i2c_smbus_write_byte_data(client, chipdef->ledout_base + i, 0x00);
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8 changes: 8 additions & 0 deletions drivers/leds/trigger/Kconfig
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Expand Up @@ -19,6 +19,14 @@ config LEDS_TRIGGER_TIMER

If unsure, say Y.

config LEDS_TRIGGER_GRPPWM
tristate "LED Group PWM trigger"
help
This allows LEDs to be controlled by group pwm feature,
supported by pca9633 i2c driver

if unsure, say Y.

config LEDS_TRIGGER_ONESHOT
tristate "LED One-shot Trigger"
help
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1 change: 1 addition & 0 deletions drivers/leds/trigger/Makefile
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Expand Up @@ -16,3 +16,4 @@ obj-$(CONFIG_LEDS_TRIGGER_NETDEV) += ledtrig-netdev.o
obj-$(CONFIG_LEDS_TRIGGER_PATTERN) += ledtrig-pattern.o
obj-$(CONFIG_LEDS_TRIGGER_AUDIO) += ledtrig-audio.o
obj-$(CONFIG_LEDS_TRIGGER_TTY) += ledtrig-tty.o
obj-$(CONFIG_LEDS_TRIGGER_GRPPWM) += ledtrig-grppwm.o
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