arch/arm/mach-footbridge/ebsa285.c

   1 /*
   2  * linux/arch/arm/mach-footbridge/ebsa285.c
   3  *
   4  * EBSA285 machine fixup
   5  */
   6 #include <linux/init.h>
   7 #include <linux/spinlock.h>
   8 #include <linux/slab.h>
   9 #include <linux/leds.h>
  10
  11 #include <asm/hardware/dec21285.h>
  12 #include <asm/mach-types.h>
  13
  14 #include <asm/mach/arch.h>
  15
  16 #include "common.h"
  17
  18 /* LEDs */
  19 #if defined(CONFIG_NEW_LEDS) && defined(CONFIG_LEDS_CLASS)
  20 struct ebsa285_led {
  21         struct led_classdev     cdev;
  22         u8                      mask;
  23 };
  24
  25 /*
  26  * The triggers lines up below will only be used if the
  27  * LED triggers are compiled in.
  28  */
  29 static const struct {
  30         const char *name;
  31         const char *trigger;
  32 } ebsa285_leds[] = {
  33         { "ebsa285:amber", "heartbeat", },
  34         { "ebsa285:green", "cpu0", },
  35         { "ebsa285:red",},
  36 };
  37
  38 static void ebsa285_led_set(struct led_classdev *cdev,
  39                 enum led_brightness b)
  40 {
  41         struct ebsa285_led *led = container_of(cdev,
  42                         struct ebsa285_led, cdev);
  43
  44         if (b != LED_OFF)
  45                 *XBUS_LEDS |= led->mask;
  46         else
  47                 *XBUS_LEDS &= ~led->mask;
  48 }
  49
  50 static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
  51 {
  52         struct ebsa285_led *led = container_of(cdev,
  53                         struct ebsa285_led, cdev);
  54
  55         return (*XBUS_LEDS & led->mask) ? LED_FULL : LED_OFF;
  56 }
  57
  58 static int __init ebsa285_leds_init(void)
  59 {
  60         int i;
  61
  62         if (machine_is_ebsa285())
  63                 return -ENODEV;
  64
  65         /* 3 LEDS All ON */
  66         *XBUS_LEDS |= XBUS_LED_AMBER | XBUS_LED_GREEN | XBUS_LED_RED;
  67
  68         for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
  69                 struct ebsa285_led *led;
  70
  71                 led = kzalloc(sizeof(*led), GFP_KERNEL);
  72                 if (!led)
  73                         break;
  74
  75                 led->cdev.name = ebsa285_leds[i].name;
  76                 led->cdev.brightness_set = ebsa285_led_set;
  77                 led->cdev.brightness_get = ebsa285_led_get;
  78                 led->cdev.default_trigger = ebsa285_leds[i].trigger;
  79                 led->mask = BIT(i);
  80
  81                 if (led_classdev_register(NULL, &led->cdev) < 0) {
  82                         kfree(led);
  83                         break;
  84                 }
  85         }
  86
  87         return 0;
  88 }
  89
  90 /*
  91  * Since we may have triggers on any subsystem, defer registration
  92  * until after subsystem_init.
  93  */
  94 fs_initcall(ebsa285_leds_init);
  95 #endif
  96
  97 MACHINE_START(EBSA285, "EBSA285")
  98         /* Maintainer: Russell King */
  99         .atag_offset    = 0x100,
 100         .video_start    = 0x000a0000,
 101         .video_end      = 0x000bffff,
 102         .map_io         = footbridge_map_io,
 103         .init_irq       = footbridge_init_irq,
 104         .init_time      = footbridge_timer_init,
 105         .restart        = footbridge_restart,
 106 MACHINE_END
 107