2 * LED driver for Atmel AT91-based boards.
4 * Copyright (C) SAN People (Pty) Ltd
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version
9 * 2 of the License, or (at your option) any later version.
12 #include <linux/config.h>
13 #include <linux/kernel.h>
14 #include <linux/module.h>
15 #include <linux/init.h>
17 #include <asm/mach-types.h>
19 #include <asm/arch/board.h>
20 #include <asm/arch/gpio.h>
23 static inline void at91_led_on(unsigned int led)
25 at91_set_gpio_value(led, 0);
28 static inline void at91_led_off(unsigned int led)
30 at91_set_gpio_value(led, 1);
33 static inline void at91_led_toggle(unsigned int led)
35 unsigned long is_off = at91_get_gpio_value(led);
46 static void at91_leds_event(led_event_t evt)
50 local_irq_save(flags);
53 case led_start: /* System startup */
54 at91_led_on(at91_leds_cpu);
57 case led_stop: /* System stop / suspend */
58 at91_led_off(at91_leds_cpu);
61 #ifdef CONFIG_LEDS_TIMER
62 case led_timer: /* Every 50 timer ticks */
63 at91_led_toggle(at91_leds_timer);
67 #ifdef CONFIG_LEDS_CPU
68 case led_idle_start: /* Entering idle state */
69 at91_led_off(at91_leds_cpu);
72 case led_idle_end: /* Exit idle state */
73 at91_led_on(at91_leds_cpu);
81 local_irq_restore(flags);
85 static int __init leds_init(void)
87 if (!at91_leds_timer || !at91_leds_cpu)
90 /* Enable PIO to access the LEDs */
91 at91_set_gpio_output(at91_leds_timer, 1);
92 at91_set_gpio_output(at91_leds_cpu, 1);
94 leds_event = at91_leds_event;
96 leds_event(led_start);
100 __initcall(leds_init);