2 * linux/arch/arm/mach-sa1100/leds-hackkit.c
6 * (C) Erik Mouw (J.A.K.Mouw@its.tudelft.nl), April 21, 2000
7 * (C) Stefan Eletzhofer <stefan.eletzhofer@eletztrick.de>, 2002
9 * The HackKit has two leds (GPIO 22/23). The red led (gpio 22) is used
10 * as cpu led, the green one is used as timer led.
12 #include <linux/init.h>
14 #include <mach/hardware.h>
20 #define LED_STATE_ENABLED 1
21 #define LED_STATE_CLAIMED 2
23 static unsigned int led_state;
24 static unsigned int hw_led_state;
26 #define LED_GREEN GPIO_GPIO23
27 #define LED_RED GPIO_GPIO22
28 #define LED_MASK (LED_RED | LED_GREEN)
30 void hackkit_leds_event(led_event_t evt)
34 local_irq_save(flags);
38 /* pin 22/23 are outputs */
40 hw_led_state = LED_MASK;
41 led_state = LED_STATE_ENABLED;
45 led_state &= ~LED_STATE_ENABLED;
49 led_state |= LED_STATE_CLAIMED;
50 hw_led_state = LED_MASK;
54 led_state &= ~LED_STATE_CLAIMED;
55 hw_led_state = LED_MASK;
58 #ifdef CONFIG_LEDS_TIMER
60 if (!(led_state & LED_STATE_CLAIMED))
61 hw_led_state ^= LED_GREEN;
65 #ifdef CONFIG_LEDS_CPU
67 /* The LART people like the LED to be off when the
69 if (!(led_state & LED_STATE_CLAIMED))
70 hw_led_state &= ~LED_RED;
74 /* ... and on if the system is not idle */
75 if (!(led_state & LED_STATE_CLAIMED))
76 hw_led_state |= LED_RED;
81 if (led_state & LED_STATE_CLAIMED)
82 hw_led_state &= ~LED_RED;
86 if (led_state & LED_STATE_CLAIMED)
87 hw_led_state |= LED_RED;
91 if (led_state & LED_STATE_CLAIMED)
92 hw_led_state &= ~LED_GREEN;
96 if (led_state & LED_STATE_CLAIMED)
97 hw_led_state |= LED_GREEN;
104 /* Now set the GPIO state, or nothing will happen at all */
105 if (led_state & LED_STATE_ENABLED) {
107 GPCR = hw_led_state ^ LED_MASK;
110 local_irq_restore(flags);