From: Patrick Bruenn p.bruenn@beckhoff.com

Add support for the device tree property "default-state". This feature might be useful for LEDs indicating "power on" or similar states.

Note: Even with this commit gpio-leds remain in reset state. That's because the led_gpio is not probed until DM_FLAG_ACTIVATED is set.

Signed-off-by: Patrick Bruenn p.bruenn@beckhoff.com

---

drivers/led/led_gpio.c | 16 +++++++++++++++- 1 file changed, 15 insertions(+), 1 deletion(-)

diff --git a/drivers/led/led_gpio.c b/drivers/led/led_gpio.c index 9976635887..e68d8d3864 100644 --- a/drivers/led/led_gpio.c +++ b/drivers/led/led_gpio.c @@ -60,11 +60,25 @@ 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 */ if (!uc_plat->label) return 0; - return gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT); + + ret = gpio_request_by_name(dev, "gpios", 0, &priv->gpio, GPIOD_IS_OUT); + 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; }

static int led_gpio_remove(struct udevice *dev)

From: Patrick Bruenn p.bruenn@beckhoff.com

To avoid board specificy LED activation code, automatically activate gpio-leds with "default-state" property during bind().

Signed-off-by: Patrick Bruenn p.bruenn@beckhoff.com ---

drivers/led/led_gpio.c | 9 +++++++++ 1 file changed, 9 insertions(+)

diff --git a/drivers/led/led_gpio.c b/drivers/led/led_gpio.c index e68d8d3864..d2fe3d5ad5 100644 --- a/drivers/led/led_gpio.c +++ b/drivers/led/led_gpio.c @@ -11,6 +11,7 @@ #include <led.h> #include <asm/gpio.h> #include <dm/lists.h> +#include <dm/uclass-internal.h>

DECLARE_GLOBAL_DATA_PTR;

@@ -120,6 +121,14 @@ static int led_gpio_bind(struct udevice *parent) return ret; uc_plat = dev_get_uclass_platdata(dev); uc_plat->label = label; + + if (ofnode_read_string(node, "default-state")) { + struct udevice *devp; + + ret = uclass_get_device_tail(dev, 0, &devp); + if (ret) + return ret; + } }

return 0;