Dear Otavio Salvador,
On Wed, Jan 30, 2013 at 1:39 PM, Marek Vasut marex@denx.de wrote:
Dear Otavio Salvador,
On Wed, Jan 30, 2013 at 12:13 PM, Marek Vasut marex@denx.de wrote:
Dear Otavio Salvador,
This allow user to know if the bootloader is running, even without a serial console.
Signed-off-by: Otavio Salvador otavio@ossystems.com.br
Uh oh, how does this know which GPIO to toggle to drive the led this time ?
The problem wasn't the code but me. I wasn't able to find the right GPIO number at that time.
This is not my question. My question is how does this toggle the GPIO for the LED?
gpio_led driver (drivers/misc/gpio_led.c) does it.
... void __led_init(led_id_t mask, int state) { gpio_request(mask, "gpio_led"); gpio_direction_output(mask, state == STATUS_LED_ON); }
void __led_set(led_id_t mask, int state) { gpio_set_value(mask, state == STATUS_LED_ON); } ...
Ok, this didn't explain much to me.
Moreover, you never set the LED GPIO as output.
The driver handles it by itself.
Oh ok.
Now that I did read through the code, I have few more questions:
Why can't STATUS_LED_BIT be the MX23_PAD_SSP1_DETECT__GPIO_2_1 now? Did you test CMD_LED, does it work when toggling the LED?
Best regards, Marek Vasut