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", "cpu0", },
34 	{ "ebsa285:green", "heartbeat", },
35 	{ "ebsa285:red",},
36 };
37 
38 static unsigned char hw_led_state;
39 
40 static void ebsa285_led_set(struct led_classdev *cdev,
41 		enum led_brightness b)
42 {
43 	struct ebsa285_led *led = container_of(cdev,
44 			struct ebsa285_led, cdev);
45 
46 	if (b == LED_OFF)
47 		hw_led_state |= led->mask;
48 	else
49 		hw_led_state &= ~led->mask;
50 	*XBUS_LEDS = hw_led_state;
51 }
52 
53 static enum led_brightness ebsa285_led_get(struct led_classdev *cdev)
54 {
55 	struct ebsa285_led *led = container_of(cdev,
56 			struct ebsa285_led, cdev);
57 
58 	return hw_led_state & led->mask ? LED_OFF : LED_FULL;
59 }
60 
61 static int __init ebsa285_leds_init(void)
62 {
63 	int i;
64 
65 	if (!machine_is_ebsa285())
66 		return -ENODEV;
67 
68 	/* 3 LEDS all off */
69 	hw_led_state = XBUS_LED_AMBER | XBUS_LED_GREEN | XBUS_LED_RED;
70 	*XBUS_LEDS = hw_led_state;
71 
72 	for (i = 0; i < ARRAY_SIZE(ebsa285_leds); i++) {
73 		struct ebsa285_led *led;
74 
75 		led = kzalloc(sizeof(*led), GFP_KERNEL);
76 		if (!led)
77 			break;
78 
79 		led->cdev.name = ebsa285_leds[i].name;
80 		led->cdev.brightness_set = ebsa285_led_set;
81 		led->cdev.brightness_get = ebsa285_led_get;
82 		led->cdev.default_trigger = ebsa285_leds[i].trigger;
83 		led->mask = BIT(i);
84 
85 		if (led_classdev_register(NULL, &led->cdev) < 0) {
86 			kfree(led);
87 			break;
88 		}
89 	}
90 
91 	return 0;
92 }
93 
94 /*
95  * Since we may have triggers on any subsystem, defer registration
96  * until after subsystem_init.
97  */
98 fs_initcall(ebsa285_leds_init);
99 #endif
100 
101 MACHINE_START(EBSA285, "EBSA285")
102 	/* Maintainer: Russell King */
103 	.atag_offset	= 0x100,
104 	.video_start	= 0x000a0000,
105 	.video_end	= 0x000bffff,
106 	.map_io		= footbridge_map_io,
107 	.init_irq	= footbridge_init_irq,
108 	.init_time	= footbridge_timer_init,
109 	.restart	= footbridge_restart,
110 MACHINE_END
111 
112