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>
16 #include <asm/system.h>
21 #define LED_STATE_ENABLED 1
22 #define LED_STATE_CLAIMED 2
24 static unsigned int led_state
;
25 static unsigned int hw_led_state
;
27 #define LED_GREEN GPIO_GPIO23
28 #define LED_RED GPIO_GPIO22
29 #define LED_MASK (LED_RED | LED_GREEN)
31 void hackkit_leds_event(led_event_t evt
)
35 local_irq_save(flags
);
39 /* pin 22/23 are outputs */
41 hw_led_state
= LED_MASK
;
42 led_state
= LED_STATE_ENABLED
;
46 led_state
&= ~LED_STATE_ENABLED
;
50 led_state
|= LED_STATE_CLAIMED
;
51 hw_led_state
= LED_MASK
;
55 led_state
&= ~LED_STATE_CLAIMED
;
56 hw_led_state
= LED_MASK
;
59 #ifdef CONFIG_LEDS_TIMER
61 if (!(led_state
& LED_STATE_CLAIMED
))
62 hw_led_state
^= LED_GREEN
;
66 #ifdef CONFIG_LEDS_CPU
68 /* The LART people like the LED to be off when the
70 if (!(led_state
& LED_STATE_CLAIMED
))
71 hw_led_state
&= ~LED_RED
;
75 /* ... and on if the system is not idle */
76 if (!(led_state
& LED_STATE_CLAIMED
))
77 hw_led_state
|= LED_RED
;
82 if (led_state
& LED_STATE_CLAIMED
)
83 hw_led_state
&= ~LED_RED
;
87 if (led_state
& LED_STATE_CLAIMED
)
88 hw_led_state
|= LED_RED
;
92 if (led_state
& LED_STATE_CLAIMED
)
93 hw_led_state
&= ~LED_GREEN
;
97 if (led_state
& LED_STATE_CLAIMED
)
98 hw_led_state
|= LED_GREEN
;
105 /* Now set the GPIO state, or nothing will happen at all */
106 if (led_state
& LED_STATE_ENABLED
) {
108 GPCR
= hw_led_state
^ LED_MASK
;
111 local_irq_restore(flags
);
This page took 0.033805 seconds and 5 git commands to generate.