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/kernel.h>
13 #include <linux/module.h>
14 #include <linux/init.h>
16 #include <asm/mach-types.h>
18 #include <asm/arch/board.h>
19 #include <asm/arch/gpio.h>
22 static inline void at91_led_on(unsigned int led)
24 at91_set_gpio_value(led, 0);
27 static inline void at91_led_off(unsigned int led)
29 at91_set_gpio_value(led, 1);
32 static inline void at91_led_toggle(unsigned int led)
34 unsigned long is_off = at91_get_gpio_value(led);
45 static void at91_leds_event(led_event_t evt)
49 local_irq_save(flags);
52 case led_start: /* System startup */
53 at91_led_on(at91_leds_cpu);
56 case led_stop: /* System stop / suspend */
57 at91_led_off(at91_leds_cpu);
60 #ifdef CONFIG_LEDS_TIMER
61 case led_timer: /* Every 50 timer ticks */
62 at91_led_toggle(at91_leds_timer);
66 #ifdef CONFIG_LEDS_CPU
67 case led_idle_start: /* Entering idle state */
68 at91_led_off(at91_leds_cpu);
71 case led_idle_end: /* Exit idle state */
72 at91_led_on(at91_leds_cpu);
80 local_irq_restore(flags);
84 static int __init leds_init(void)
86 if (!at91_leds_timer || !at91_leds_cpu)
89 /* Enable PIO to access the LEDs */
90 at91_set_gpio_output(at91_leds_timer, 1);
91 at91_set_gpio_output(at91_leds_cpu, 1);
93 leds_event = at91_leds_event;
95 leds_event(led_start);
99 __initcall(leds_init);