Commit | Line | Data |
---|---|---|
ed4a10b4 MH |
1 | /* |
2 | * LEDs driver for Analog Devices ADP5520/ADP5501 MFD PMICs | |
3 | * | |
4 | * Copyright 2009 Analog Devices Inc. | |
5 | * | |
6 | * Loosely derived from leds-da903x: | |
7 | * Copyright (C) 2008 Compulab, Ltd. | |
ef734162 | 8 | * Mike Rapoport <mike@compulab.co.il> |
ed4a10b4 MH |
9 | * |
10 | * Copyright (C) 2006-2008 Marvell International Ltd. | |
ef734162 | 11 | * Eric Miao <eric.miao@marvell.com> |
ed4a10b4 MH |
12 | * |
13 | * Licensed under the GPL-2 or later. | |
14 | */ | |
15 | ||
16 | #include <linux/module.h> | |
17 | #include <linux/kernel.h> | |
ed4a10b4 MH |
18 | #include <linux/platform_device.h> |
19 | #include <linux/leds.h> | |
ed4a10b4 | 20 | #include <linux/mfd/adp5520.h> |
5a0e3ad6 | 21 | #include <linux/slab.h> |
ed4a10b4 MH |
22 | |
23 | struct adp5520_led { | |
24 | struct led_classdev cdev; | |
ed4a10b4 | 25 | struct device *master; |
ed4a10b4 MH |
26 | int id; |
27 | int flags; | |
28 | }; | |
29 | ||
64d44e5a | 30 | static int adp5520_led_set(struct led_classdev *led_cdev, |
ed4a10b4 MH |
31 | enum led_brightness value) |
32 | { | |
33 | struct adp5520_led *led; | |
34 | ||
35 | led = container_of(led_cdev, struct adp5520_led, cdev); | |
64d44e5a AL |
36 | return adp5520_write(led->master, ADP5520_LED1_CURRENT + led->id - 1, |
37 | value >> 2); | |
ed4a10b4 MH |
38 | } |
39 | ||
40 | static int adp5520_led_setup(struct adp5520_led *led) | |
41 | { | |
42 | struct device *dev = led->master; | |
43 | int flags = led->flags; | |
44 | int ret = 0; | |
45 | ||
46 | switch (led->id) { | |
47 | case FLAG_ID_ADP5520_LED1_ADP5501_LED0: | |
48 | ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, | |
49 | (flags >> ADP5520_FLAG_OFFT_SHIFT) & | |
50 | ADP5520_FLAG_OFFT_MASK); | |
51 | ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, | |
52 | ADP5520_LED1_EN); | |
53 | break; | |
54 | case FLAG_ID_ADP5520_LED2_ADP5501_LED1: | |
55 | ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, | |
56 | ((flags >> ADP5520_FLAG_OFFT_SHIFT) & | |
57 | ADP5520_FLAG_OFFT_MASK) << 2); | |
58 | ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL, | |
59 | ADP5520_R3_MODE); | |
60 | ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, | |
61 | ADP5520_LED2_EN); | |
62 | break; | |
63 | case FLAG_ID_ADP5520_LED3_ADP5501_LED2: | |
64 | ret |= adp5520_set_bits(dev, ADP5520_LED_TIME, | |
65 | ((flags >> ADP5520_FLAG_OFFT_SHIFT) & | |
66 | ADP5520_FLAG_OFFT_MASK) << 4); | |
67 | ret |= adp5520_clr_bits(dev, ADP5520_LED_CONTROL, | |
68 | ADP5520_C3_MODE); | |
69 | ret |= adp5520_set_bits(dev, ADP5520_LED_CONTROL, | |
70 | ADP5520_LED3_EN); | |
71 | break; | |
72 | } | |
73 | ||
74 | return ret; | |
75 | } | |
76 | ||
98ea1ea2 | 77 | static int adp5520_led_prepare(struct platform_device *pdev) |
ed4a10b4 | 78 | { |
87aae1ea | 79 | struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev); |
ed4a10b4 MH |
80 | struct device *dev = pdev->dev.parent; |
81 | int ret = 0; | |
82 | ||
83 | ret |= adp5520_write(dev, ADP5520_LED1_CURRENT, 0); | |
84 | ret |= adp5520_write(dev, ADP5520_LED2_CURRENT, 0); | |
85 | ret |= adp5520_write(dev, ADP5520_LED3_CURRENT, 0); | |
86 | ret |= adp5520_write(dev, ADP5520_LED_TIME, pdata->led_on_time << 6); | |
87 | ret |= adp5520_write(dev, ADP5520_LED_FADE, FADE_VAL(pdata->fade_in, | |
88 | pdata->fade_out)); | |
89 | ||
90 | return ret; | |
91 | } | |
92 | ||
98ea1ea2 | 93 | static int adp5520_led_probe(struct platform_device *pdev) |
ed4a10b4 | 94 | { |
87aae1ea | 95 | struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev); |
ed4a10b4 MH |
96 | struct adp5520_led *led, *led_dat; |
97 | struct led_info *cur_led; | |
98 | int ret, i; | |
99 | ||
100 | if (pdata == NULL) { | |
101 | dev_err(&pdev->dev, "missing platform data\n"); | |
102 | return -ENODEV; | |
103 | } | |
104 | ||
105 | if (pdata->num_leds > ADP5520_01_MAXLEDS) { | |
106 | dev_err(&pdev->dev, "can't handle more than %d LEDS\n", | |
107 | ADP5520_01_MAXLEDS); | |
108 | return -EFAULT; | |
109 | } | |
110 | ||
bcbf0162 BW |
111 | led = devm_kzalloc(&pdev->dev, sizeof(*led) * pdata->num_leds, |
112 | GFP_KERNEL); | |
0c9a03b6 | 113 | if (!led) |
ed4a10b4 | 114 | return -ENOMEM; |
ed4a10b4 MH |
115 | |
116 | ret = adp5520_led_prepare(pdev); | |
ed4a10b4 MH |
117 | if (ret) { |
118 | dev_err(&pdev->dev, "failed to write\n"); | |
bcbf0162 | 119 | return ret; |
ed4a10b4 MH |
120 | } |
121 | ||
122 | for (i = 0; i < pdata->num_leds; ++i) { | |
123 | cur_led = &pdata->leds[i]; | |
124 | led_dat = &led[i]; | |
125 | ||
126 | led_dat->cdev.name = cur_led->name; | |
127 | led_dat->cdev.default_trigger = cur_led->default_trigger; | |
64d44e5a | 128 | led_dat->cdev.brightness_set_blocking = adp5520_led_set; |
ed4a10b4 MH |
129 | led_dat->cdev.brightness = LED_OFF; |
130 | ||
131 | if (cur_led->flags & ADP5520_FLAG_LED_MASK) | |
132 | led_dat->flags = cur_led->flags; | |
133 | else | |
134 | led_dat->flags = i + 1; | |
135 | ||
136 | led_dat->id = led_dat->flags & ADP5520_FLAG_LED_MASK; | |
137 | ||
138 | led_dat->master = pdev->dev.parent; | |
ed4a10b4 MH |
139 | |
140 | ret = led_classdev_register(led_dat->master, &led_dat->cdev); | |
141 | if (ret) { | |
142 | dev_err(&pdev->dev, "failed to register LED %d\n", | |
143 | led_dat->id); | |
144 | goto err; | |
145 | } | |
146 | ||
147 | ret = adp5520_led_setup(led_dat); | |
148 | if (ret) { | |
149 | dev_err(&pdev->dev, "failed to write\n"); | |
150 | i++; | |
151 | goto err; | |
152 | } | |
153 | } | |
154 | ||
155 | platform_set_drvdata(pdev, led); | |
156 | return 0; | |
157 | ||
158 | err: | |
159 | if (i > 0) { | |
64d44e5a | 160 | for (i = i - 1; i >= 0; i--) |
ed4a10b4 | 161 | led_classdev_unregister(&led[i].cdev); |
ed4a10b4 MH |
162 | } |
163 | ||
ed4a10b4 MH |
164 | return ret; |
165 | } | |
166 | ||
678e8a6b | 167 | static int adp5520_led_remove(struct platform_device *pdev) |
ed4a10b4 | 168 | { |
87aae1ea | 169 | struct adp5520_leds_platform_data *pdata = dev_get_platdata(&pdev->dev); |
ed4a10b4 MH |
170 | struct adp5520_led *led; |
171 | int i; | |
172 | ||
173 | led = platform_get_drvdata(pdev); | |
174 | ||
175 | adp5520_clr_bits(led->master, ADP5520_LED_CONTROL, | |
176 | ADP5520_LED1_EN | ADP5520_LED2_EN | ADP5520_LED3_EN); | |
177 | ||
178 | for (i = 0; i < pdata->num_leds; i++) { | |
179 | led_classdev_unregister(&led[i].cdev); | |
ed4a10b4 MH |
180 | } |
181 | ||
ed4a10b4 MH |
182 | return 0; |
183 | } | |
184 | ||
185 | static struct platform_driver adp5520_led_driver = { | |
186 | .driver = { | |
187 | .name = "adp5520-led", | |
ed4a10b4 MH |
188 | }, |
189 | .probe = adp5520_led_probe, | |
df07cf81 | 190 | .remove = adp5520_led_remove, |
ed4a10b4 MH |
191 | }; |
192 | ||
892a8843 | 193 | module_platform_driver(adp5520_led_driver); |
ed4a10b4 MH |
194 | |
195 | MODULE_AUTHOR("Michael Hennerich <hennerich@blackfin.uclinux.org>"); | |
196 | MODULE_DESCRIPTION("LEDS ADP5520(01) Driver"); | |
197 | MODULE_LICENSE("GPL"); | |
198 | MODULE_ALIAS("platform:adp5520-led"); |