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led: Remove state-saving of led for toggle functionality and add toggle option to led command

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* Read the led output state from GPIO instead saving state in memory when it is [re]set
* Added a toggle option to the led command

Previous discussion:
http://lists.denx.de/pipermail/u-boot/2011-May/093068.html

Changes since v1:
Fixed checkpatch errors

Signed-off-by: Joel A Fernandes <agnel.joel@gmail.com>
Signed-off-by: Jason Kridner <jkridner@beagleboard.org>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
This commit is contained in:
Joel A Fernandes
2011-08-11 23:16:53 -05:00
committed by Albert ARIBAUD
parent d604cda34a
commit b8bc8973a1
2 changed files with 52 additions and 40 deletions
Download Patch File Download Diff File Expand all files Collapse all files

28
board/ti/beagle/led.c
View File

@@ -24,8 +24,6 @@
#include <asm/arch/sys_proto.h>
#include <asm/arch/gpio.h>
static unsigned int saved_state[2] = {STATUS_LED_OFF, STATUS_LED_OFF};
/* GPIO pins for the LEDs */
#define BEAGLE_LED_USR0 150
#define BEAGLE_LED_USR1 149
@@ -49,22 +47,22 @@ void __led_init (led_id_t mask, int state)
void __led_toggle (led_id_t mask)
{
int state, toggle_gpio = 0;
#ifdef STATUS_LED_BIT
if (STATUS_LED_BIT & mask) {
if (STATUS_LED_ON == saved_state[0])
__led_set(STATUS_LED_BIT, 0);
else
__led_set(STATUS_LED_BIT, 1);
}
if (!toggle_gpio && STATUS_LED_BIT & mask)
toggle_gpio = BEAGLE_LED_USR0;
#endif
#ifdef STATUS_LED_BIT1
if (STATUS_LED_BIT1 & mask) {
if (STATUS_LED_ON == saved_state[1])
__led_set(STATUS_LED_BIT1, 0);
else
__led_set(STATUS_LED_BIT1, 1);
}
if (!toggle_gpio && STATUS_LED_BIT1 & mask)
toggle_gpio = BEAGLE_LED_USR1;
#endif
if (toggle_gpio) {
if (!omap_request_gpio(toggle_gpio)) {
omap_set_gpio_direction(toggle_gpio, 0);
state = omap_get_gpio_dataout(toggle_gpio);
omap_set_gpio_dataout(toggle_gpio, !state);
}
}
}
void __led_set (led_id_t mask, int state)
@@ -75,7 +73,6 @@ void __led_set (led_id_t mask, int state)
omap_set_gpio_direction(BEAGLE_LED_USR0, 0);
omap_set_gpio_dataout(BEAGLE_LED_USR0, state);
}
saved_state[0] = state;
}
#endif
#ifdef STATUS_LED_BIT1
@@ -84,7 +81,6 @@ void __led_set (led_id_t mask, int state)
omap_set_gpio_direction(BEAGLE_LED_USR1, 0);
omap_set_gpio_dataout(BEAGLE_LED_USR1, state);
}
saved_state[1] = state;
}
#endif
}