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leds: pca9532: Extend pca9532 device tree support

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This patch extends the device tree support for the pca9532 by adding
the leds 'default-state' property.

Signed-off-by: Felix Brack <fb@ltec.ch>
Signed-off-by: Jacek Anaszewski <jacek.anaszewski@gmail.com>
This commit is contained in:
Felix Brack
2017-04-13 09:51:38 +02:00
committed by Jacek Anaszewski
parent cd3b0b0532
commit 28c5fe9901
3 changed files with 38 additions and 3 deletions
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27
drivers/leds/leds-pca9532.c
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@@ -254,6 +254,21 @@ static void pca9532_input_work(struct work_struct *work)
mutex_unlock(&data->update_lock);
}
static enum pca9532_state pca9532_getled(struct pca9532_led *led)
{
struct i2c_client *client = led->client;
struct pca9532_data *data = i2c_get_clientdata(client);
u8 maxleds = data->chip_info->num_leds;
char reg;
enum pca9532_state ret;
mutex_lock(&data->update_lock);
reg = i2c_smbus_read_byte_data(client, LED_REG(maxleds, led->id));
ret = reg >> LED_NUM(led->id)/2;
mutex_unlock(&data->update_lock);
return ret;
}
#ifdef CONFIG_LEDS_PCA9532_GPIO
static int pca9532_gpio_request_pin(struct gpio_chip *gc, unsigned offset)
{
@@ -366,7 +381,10 @@ static int pca9532_configure(struct i2c_client *client,
gpios++;
break;
case PCA9532_TYPE_LED:
led->state = pled->state;
if (pled->state == PCA9532_KEEP)
led->state = pca9532_getled(led);
else
led->state = pled->state;
led->name = pled->name;
led->ldev.name = led->name;
led->ldev.default_trigger = pled->default_trigger;
@@ -456,6 +474,7 @@ pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
const struct of_device_id *match;
int devid, maxleds;
int i = 0;
const char *state;
match = of_match_device(of_pca9532_leds_match, dev);
if (!match)
@@ -475,6 +494,12 @@ pca9532_of_populate_pdata(struct device *dev, struct device_node *np)
of_property_read_u32(child, "type", &pdata->leds[i].type);
of_property_read_string(child, "linux,default-trigger",
&pdata->leds[i].default_trigger);
if (!of_property_read_string(child, "default-state", &state)) {
if (!strcmp(state, "on"))
pdata->leds[i].state = PCA9532_ON;
else if (!strcmp(state, "keep"))
pdata->leds[i].state = PCA9532_KEEP;
}
if (++i >= maxleds) {
of_node_put(child);
break;