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dm: led: move default state support in led uclass

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This patch save common LED property "default-state" value
in post bind of LED uclass.
The configuration for this default state is only performed when
led_default_state() is called;
It can be called in your board_init()
or it could added in init_sequence_r[] in future.

Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
This commit is contained in:
Patrick Delaunay 2018-07-27 16:37:07 +02:00 committed by Tom Rini
parent 1f6d81fe33
commit d7a435a2ce
3 changed files with 39 additions and 8 deletions
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30
drivers/led/led-uclass.c
View File

@ -8,6 +8,7 @@
#include <dm.h>
#include <errno.h>
#include <led.h>
#include <dm/device-internal.h>
#include <dm/root.h>
#include <dm/uclass-internal.h>
@ -63,6 +64,35 @@ int led_set_period(struct udevice *dev, int period_ms)
}
#endif
int led_default_state(void)
{
struct udevice *dev;
struct uclass *uc;
const char *default_state;
int ret;
ret = uclass_get(UCLASS_LED, &uc);
if (ret)
return ret;
for (uclass_find_first_device(UCLASS_LED, &dev);
dev;
uclass_find_next_device(&dev)) {
default_state = dev_read_string(dev, "default-state");
if (!default_state)
continue;
ret = device_probe(dev);
if (ret)
return ret;
if (!strncmp(default_state, "on", 2))
led_set_state(dev, LEDST_ON);
else if (!strncmp(default_state, "off", 3))
led_set_state(dev, LEDST_OFF);
/* default-state = "keep" : device is only probed */
}
return ret;
}
UCLASS_DRIVER(led) = {
.id = UCLASS_LED,
.name = "led",

8
drivers/led/led_gpio.c
View File

@ -57,7 +57,6 @@ static int led_gpio_probe(struct udevice *dev)
{
struct led_uc_plat *uc_plat = dev_get_uclass_platdata(dev);
struct led_gpio_priv *priv = dev_get_priv(dev);
const char *default_state;
int ret;
/* Ignore the top-level LED node */
@ -68,13 +67,6 @@ static int led_gpio_probe(struct udevice *dev)
if (ret)
return ret;
default_state = dev_read_string(dev, "default-state");
if (default_state) {
if (!strncmp(default_state, "on", 2))
gpio_led_set_state(dev, LEDST_ON);
else if (!strncmp(default_state, "off", 3))
gpio_led_set_state(dev, LEDST_OFF);
}
return 0;
}

9
include/led.h
View File

@ -106,4 +106,13 @@ enum led_state_t led_get_state(struct udevice *dev);
*/
int led_set_period(struct udevice *dev, int period_ms);
/**
* led_default_state() - set the default state for all the LED
*
* This enables all leds which have default state.
* see Documentation/devicetree/bindings/leds/common.txt
*
*/
int led_default_state(void);
#endif