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 	.timer		= &footbridge_timer,
105 	.restart	= footbridge_restart,
106 MACHINE_END
107 
108