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1 | /* |
2 | * drivers/leds/leds-h1940.c |
3 | * Copyright (c) Arnaud Patard <arnaud.patard@rtp-net.org> |
4 | * |
5 | * This file is subject to the terms and conditions of the GNU General Public |
6 | * License. See the file COPYING in the main directory of this archive for |
7 | * more details. |
8 | * |
9 | * H1940 leds driver |
10 | * |
11 | */ |
12 | |
13 | #include <linux/module.h> |
14 | #include <linux/platform_device.h> |
15 | #include <linux/delay.h> |
16 | #include <linux/string.h> |
17 | #include <linux/ctype.h> |
18 | #include <linux/leds.h> |
19 | #include <linux/gpio.h> |
20 | |
21 | #include <mach/regs-gpio.h> |
22 | #include <mach/hardware.h> |
23 | #include <mach/h1940-latch.h> |
24 | |
25 | /* |
26 | * Green led. |
27 | */ |
28 | static void h1940_greenled_set(struct led_classdev *led_dev, |
29 | enum led_brightness value) |
30 | { |
31 | switch (value) { |
32 | case LED_HALF: |
33 | h1940_latch_control(0, H1940_LATCH_LED_FLASH); |
34 | s3c2410_gpio_setpin(S3C2410_GPA7, 1); |
35 | break; |
36 | case LED_FULL: |
37 | h1940_latch_control(0, H1940_LATCH_LED_GREEN); |
38 | s3c2410_gpio_setpin(S3C2410_GPA7, 1); |
39 | break; |
40 | default: |
41 | case LED_OFF: |
42 | h1940_latch_control(H1940_LATCH_LED_FLASH, 0); |
43 | h1940_latch_control(H1940_LATCH_LED_GREEN, 0); |
44 | s3c2410_gpio_setpin(S3C2410_GPA7, 0); |
45 | break; |
46 | } |
47 | } |
48 | |
49 | static struct led_classdev h1940_greenled = { |
50 | .name = "h1940:green", |
51 | .brightness_set = h1940_greenled_set, |
52 | .default_trigger = "h1940-charger", |
53 | }; |
54 | |
55 | /* |
56 | * Red led. |
57 | */ |
58 | static void h1940_redled_set(struct led_classdev *led_dev, |
59 | enum led_brightness value) |
60 | { |
61 | switch (value) { |
62 | case LED_HALF: |
63 | h1940_latch_control(0, H1940_LATCH_LED_FLASH); |
64 | s3c2410_gpio_setpin(S3C2410_GPA1, 1); |
65 | break; |
66 | case LED_FULL: |
67 | h1940_latch_control(0, H1940_LATCH_LED_RED); |
68 | s3c2410_gpio_setpin(S3C2410_GPA1, 1); |
69 | break; |
70 | default: |
71 | case LED_OFF: |
72 | h1940_latch_control(H1940_LATCH_LED_FLASH, 0); |
73 | h1940_latch_control(H1940_LATCH_LED_RED, 0); |
74 | s3c2410_gpio_setpin(S3C2410_GPA1, 0); |
75 | break; |
76 | } |
77 | } |
78 | |
79 | static struct led_classdev h1940_redled = { |
80 | .name = "h1940:red", |
81 | .brightness_set = h1940_redled_set, |
82 | .default_trigger = "h1940-charger", |
83 | }; |
84 | |
85 | /* |
86 | * Blue led. |
87 | * (it can only be blue flashing led) |
88 | */ |
89 | static void h1940_blueled_set(struct led_classdev *led_dev, |
90 | enum led_brightness value) |
91 | { |
92 | if (value) { |
93 | /* flashing Blue */ |
94 | h1940_latch_control(0, H1940_LATCH_LED_FLASH); |
95 | s3c2410_gpio_setpin(S3C2410_GPA3, 1); |
96 | } else { |
97 | h1940_latch_control(H1940_LATCH_LED_FLASH, 0); |
98 | s3c2410_gpio_setpin(S3C2410_GPA3, 0); |
99 | } |
100 | |
101 | } |
102 | |
103 | static struct led_classdev h1940_blueled = { |
104 | .name = "h1940:blue", |
105 | .brightness_set = h1940_blueled_set, |
106 | .default_trigger = "h1940-bluetooth", |
107 | }; |
108 | |
109 | static int __devinit h1940leds_probe(struct platform_device *pdev) |
110 | { |
111 | int ret; |
112 | |
113 | ret = led_classdev_register(&pdev->dev, &h1940_greenled); |
114 | if (ret) |
115 | goto err_green; |
116 | |
117 | ret = led_classdev_register(&pdev->dev, &h1940_redled); |
118 | if (ret) |
119 | goto err_red; |
120 | |
121 | ret = led_classdev_register(&pdev->dev, &h1940_blueled); |
122 | if (ret) |
123 | goto err_blue; |
124 | |
125 | return 0; |
126 | |
127 | err_blue: |
128 | led_classdev_unregister(&h1940_redled); |
129 | err_red: |
130 | led_classdev_unregister(&h1940_greenled); |
131 | err_green: |
132 | return ret; |
133 | } |
134 | |
135 | static int h1940leds_remove(struct platform_device *pdev) |
136 | { |
137 | led_classdev_unregister(&h1940_greenled); |
138 | led_classdev_unregister(&h1940_redled); |
139 | led_classdev_unregister(&h1940_blueled); |
140 | return 0; |
141 | } |
142 | |
143 | |
144 | static struct platform_driver h1940leds_driver = { |
145 | .driver = { |
146 | .name = "h1940-leds", |
147 | .owner = THIS_MODULE, |
148 | }, |
149 | .probe = h1940leds_probe, |
150 | .remove = h1940leds_remove, |
151 | }; |
152 | |
153 | |
154 | static int __init h1940leds_init(void) |
155 | { |
156 | return platform_driver_register(&h1940leds_driver); |
157 | } |
158 | |
159 | static void __exit h1940leds_exit(void) |
160 | { |
161 | platform_driver_unregister(&h1940leds_driver); |
162 | } |
163 | |
164 | module_init(h1940leds_init); |
165 | module_exit(h1940leds_exit); |
166 | |
167 | MODULE_AUTHOR("Arnaud Patard <arnaud.patard@rtp-net.org>"); |
168 | MODULE_DESCRIPTION("LED driver for the iPAQ H1940"); |
169 | MODULE_LICENSE("GPL"); |
170 | MODULE_ALIAS("platform:h1940-leds"); |
171 |
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