projects / deliverable / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| fdb72fd8 AV |
1 | /* |
| 2 | * LED driver for KS8695-based boards. | |
| 3 | * | |
| 4 | * Copyright (C) Andrew Victor | |
| 5 | * | |
| 6 | * This program is free software; you can redistribute it and/or modify | |
| 7 | * it under the terms of the GNU General Public License version 2 as | |
| 8 | * published by the Free Software Foundation. | |
| 9 | */ | |
| 2f8163ba | 10 | #include <linux/gpio.h> |
| fdb72fd8 AV |
11 | #include <linux/kernel.h> |
| 12 | #include <linux/module.h> | |
| 13 | #include <linux/init.h> | |
| 386ab640 | 14 | #include <linux/gpio.h> |
| fdb72fd8 | 15 | |
| fdb72fd8 | 16 | #include <asm/leds.h> |
| a09e64fb | 17 | #include <mach/devices.h> |
| fdb72fd8 AV |
18 | |
| 19 | ||
| 20 | static inline void ks8695_led_on(unsigned int led) | |
| 21 | { | |
| 22 | gpio_set_value(led, 0); | |
| 23 | } | |
| 24 | ||
| 25 | static inline void ks8695_led_off(unsigned int led) | |
| 26 | { | |
| 27 | gpio_set_value(led, 1); | |
| 28 | } | |
| 29 | ||
| 30 | static inline void ks8695_led_toggle(unsigned int led) | |
| 31 | { | |
| 32 | unsigned long is_off = gpio_get_value(led); | |
| 33 | if (is_off) | |
| 34 | ks8695_led_on(led); | |
| 35 | else | |
| 36 | ks8695_led_off(led); | |
| 37 | } | |
| 38 | ||
| 39 | ||
| 40 | /* | |
| 41 | * Handle LED events. | |
| 42 | */ | |
| 43 | static void ks8695_leds_event(led_event_t evt) | |
| 44 | { | |
| 45 | unsigned long flags; | |
| 46 | ||
| 47 | local_irq_save(flags); | |
| 48 | ||
| 49 | switch(evt) { | |
| 50 | case led_start: /* System startup */ | |
| 51 | ks8695_led_on(ks8695_leds_cpu); | |
| 52 | break; | |
| 53 | ||
| 54 | case led_stop: /* System stop / suspend */ | |
| 55 | ks8695_led_off(ks8695_leds_cpu); | |
| 56 | break; | |
| 57 | ||
| 58 | #ifdef CONFIG_LEDS_TIMER | |
| 59 | case led_timer: /* Every 50 timer ticks */ | |
| 60 | ks8695_led_toggle(ks8695_leds_timer); | |
| 61 | break; | |
| 62 | #endif | |
| 63 | ||
| 64 | #ifdef CONFIG_LEDS_CPU | |
| 65 | case led_idle_start: /* Entering idle state */ | |
| 66 | ks8695_led_off(ks8695_leds_cpu); | |
| 67 | break; | |
| 68 | ||
| 69 | case led_idle_end: /* Exit idle state */ | |
| 70 | ks8695_led_on(ks8695_leds_cpu); | |
| 71 | break; | |
| 72 | #endif | |
| 73 | ||
| 74 | default: | |
| 75 | break; | |
| 76 | } | |
| 77 | ||
| 78 | local_irq_restore(flags); | |
| 79 | } | |
| 80 | ||
| 81 | ||
| 82 | static int __init leds_init(void) | |
| 83 | { | |
| 84 | if ((ks8695_leds_timer == -1) || (ks8695_leds_cpu == -1)) | |
| 85 | return -ENODEV; | |
| 86 | ||
| 87 | leds_event = ks8695_leds_event; | |
| 88 | ||
| 89 | leds_event(led_start); | |
| 90 | return 0; | |
| 91 | } | |
| 92 | ||
| 93 | __initcall(leds_init); |