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allow LED initialization without STATUS_LED_BOOT 

For current U-Boot to initialize status LEDs via status_led_init(), it
is required to have both CONFIG_STATUS_LED and STATUS_LED_BOOT defined.
This may be a particular concern with GPIO LEDs, where __led_init() is
required to correctly set up the GPIO (gpio_request and
gpio_direction_output). Without STATUS_LED_BOOT the initialization isn't
called, which could leave the user with a non-functional "led" command -
due to the fact that the LED routines in gpio_led.c use gpio_set_value()
just fine, but the GPIO never got set up properly in the first place.

I think having CONFIG_STATUS_LED is sufficient to justify a
corresponding call to status_led_init(), even with no STATUS_LED_BOOT
defined. To do so, common/board_r.c needs call that routine, so it now
is exposed via status_led.h.

Signed-off-by: Bernhard Nortmann <bernhard.nortmann@web.de>
[trini: Add dummy __led_init to pca9551_led.c]
Signed-off-by: Tom Rini <trini@konsulko.com>
This commit is contained in:
Bernhard Nortmann 2015-08-21 15:13:21 +02:00 committed by Tom Rini
parent d375ebbcb6
commit 13cfbe5135
4 changed files with 13 additions and 5 deletions
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9
common/board_r.c
View File

@ -544,11 +544,14 @@ static int initr_kgdb(void)
}
#endif
#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
#if defined(CONFIG_STATUS_LED)
static int initr_status_led(void)
{
#if defined(STATUS_LED_BOOT)
status_led_set(STATUS_LED_BOOT, STATUS_LED_BLINKING);
#else
status_led_init();
#endif
return 0;
}
#endif
@ -835,7 +838,7 @@ init_fnc_t init_sequence_r[] = {
|| defined(CONFIG_M68K)
timer_init, /* initialize timer */
#endif
#if defined(CONFIG_STATUS_LED) && defined(STATUS_LED_BOOT)
#if defined(CONFIG_STATUS_LED)
initr_status_led,
#endif
/* PPC has a udelay(20) here dating from 2002. Why? */

6
drivers/misc/pca9551_led.c
View File

@ -116,8 +116,12 @@ static int pca9551_led_set_blink_rate(int idx, struct pca9551_blink_rate rate)
}
/*
* Functions referenced by cmd_led.c
* Functions referenced by cmd_led.c or status_led.c
*/
void __led_init(led_id_t id, int state)
{
}
void __led_set(led_id_t mask, int state)
{
if (state == STATUS_LED_OFF)

2
drivers/misc/status_led.c
View File

@ -73,7 +73,7 @@ led_dev_t led_dev[] = {
static int status_led_init_done = 0;
static void status_led_init (void)
void status_led_init(void)
{
led_dev_t *ld;
int i;

1
include/status_led.h
View File

@ -23,6 +23,7 @@
#define STATUS_LED_BLINKING 1
#define STATUS_LED_ON 2
void status_led_init(void);
void status_led_tick (unsigned long timestamp);
void status_led_set (int led, int state);