arch/arm/mach-omap1/leds.c

   1 /*
   2  * linux/arch/arm/mach-omap1/leds.c
   3  *
   4  * OMAP LEDs dispatcher
   5  */
   6 #include <linux/gpio.h>
   7 #include <linux/kernel.h>
   8 #include <linux/init.h>
   9
  10 #include <asm/leds.h>
  11 #include <asm/mach-types.h>
  12
  13 #include <plat/mux.h>
  14
  15 #include "leds.h"
  16
  17 static int __init
  18 omap_leds_init(void)
  19 {
  20         if (!cpu_class_is_omap1())
  21                 return -ENODEV;
  22
  23         if (machine_is_omap_innovator())
  24                 leds_event = innovator_leds_event;
  25
  26         else if (machine_is_omap_h2()
  27                         || machine_is_omap_h3()
  28                         || machine_is_omap_perseus2())
  29                 leds_event = h2p2_dbg_leds_event;
  30
  31         else if (machine_is_omap_osk())
  32                 leds_event = osk_leds_event;
  33
  34         else
  35                 return -1;
  36
  37         if (machine_is_omap_h2()
  38                         || machine_is_omap_h3()
  39 #ifdef  CONFIG_OMAP_OSK_MISTRAL
  40                         || machine_is_omap_osk()
  41 #endif
  42                         ) {
  43
  44                 /* LED1/LED2 pins can be used as GPIO (as done here), or by
  45                  * the LPG (works even in deep sleep!), to drive a bicolor
  46                  * LED on the H2 sample board, and another on the H2/P2
  47                  * "surfer" expansion board.
  48                  *
  49                  * The same pins drive a LED on the OSK Mistral board, but
  50                  * that's a different kind of LED (just one color at a time).
  51                  */
  52                 omap_cfg_reg(P18_1610_GPIO3);
  53                 if (gpio_request(3, "LED red") == 0)
  54                         gpio_direction_output(3, 1);
  55                 else
  56                         printk(KERN_WARNING "LED: can't get GPIO3/red?\n");
  57
  58                 omap_cfg_reg(MPUIO4);
  59                 if (gpio_request(OMAP_MPUIO(4), "LED green") == 0)
  60                         gpio_direction_output(OMAP_MPUIO(4), 1);
  61                 else
  62                         printk(KERN_WARNING "LED: can't get MPUIO4/green?\n");
  63         }
  64
  65         leds_event(led_start);
  66         return 0;
  67 }
  68
  69 __initcall(omap_leds_init);