Commit | Line | Data |
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7fdcef8a | 1 | /* |
ae6cdb03 | 2 | * LEDs driver for Freescale MC13783/MC13892 |
7fdcef8a PR |
3 | * |
4 | * Copyright (C) 2010 Philippe Rétornaz | |
5 | * | |
6 | * Based on leds-da903x: | |
7 | * Copyright (C) 2008 Compulab, Ltd. | |
8 | * Mike Rapoport <mike@compulab.co.il> | |
9 | * | |
10 | * Copyright (C) 2006-2008 Marvell International Ltd. | |
11 | * Eric Miao <eric.miao@marvell.com> | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License version 2 as | |
15 | * published by the Free Software Foundation. | |
16 | */ | |
17 | ||
18 | #include <linux/module.h> | |
19 | #include <linux/kernel.h> | |
20 | #include <linux/init.h> | |
21 | #include <linux/platform_device.h> | |
22 | #include <linux/leds.h> | |
23 | #include <linux/workqueue.h> | |
f3ca0782 | 24 | #include <linux/mfd/mc13xxx.h> |
7fdcef8a | 25 | |
9d263813 AS |
26 | #define MC13XXX_REG_LED_CONTROL(x) (51 + (x)) |
27 | ||
28 | struct mc13xxx_led_devtype { | |
29 | int led_min; | |
30 | int led_max; | |
31 | int num_regs; | |
32 | }; | |
33 | ||
34 | struct mc13xxx_led { | |
7fdcef8a PR |
35 | struct led_classdev cdev; |
36 | struct work_struct work; | |
f3ca0782 | 37 | struct mc13xxx *master; |
7fdcef8a PR |
38 | enum led_brightness new_brightness; |
39 | int id; | |
40 | }; | |
41 | ||
9d263813 AS |
42 | struct mc13xxx_leds { |
43 | struct mc13xxx_led_devtype *devtype; | |
44 | int num_leds; | |
45 | struct mc13xxx_led led[0]; | |
46 | }; | |
47 | ||
48 | static void mc13xxx_led_work(struct work_struct *work) | |
7fdcef8a | 49 | { |
9d263813 AS |
50 | struct mc13xxx_led *led = container_of(work, struct mc13xxx_led, work); |
51 | int reg, mask, value, bank, off, shift; | |
7fdcef8a PR |
52 | |
53 | switch (led->id) { | |
54 | case MC13783_LED_MD: | |
9d263813 AS |
55 | reg = MC13XXX_REG_LED_CONTROL(2); |
56 | shift = 9; | |
57 | mask = 0x0f; | |
58 | value = led->new_brightness >> 4; | |
7fdcef8a PR |
59 | break; |
60 | case MC13783_LED_AD: | |
9d263813 AS |
61 | reg = MC13XXX_REG_LED_CONTROL(2); |
62 | shift = 13; | |
63 | mask = 0x0f; | |
64 | value = led->new_brightness >> 4; | |
7fdcef8a PR |
65 | break; |
66 | case MC13783_LED_KP: | |
9d263813 AS |
67 | reg = MC13XXX_REG_LED_CONTROL(2); |
68 | shift = 17; | |
69 | mask = 0x0f; | |
70 | value = led->new_brightness >> 4; | |
7fdcef8a PR |
71 | break; |
72 | case MC13783_LED_R1: | |
73 | case MC13783_LED_G1: | |
74 | case MC13783_LED_B1: | |
75 | case MC13783_LED_R2: | |
76 | case MC13783_LED_G2: | |
77 | case MC13783_LED_B2: | |
78 | case MC13783_LED_R3: | |
79 | case MC13783_LED_G3: | |
80 | case MC13783_LED_B3: | |
81 | off = led->id - MC13783_LED_R1; | |
9d263813 AS |
82 | bank = off / 3; |
83 | reg = MC13XXX_REG_LED_CONTROL(3) + bank; | |
84 | shift = (off - bank * 3) * 5 + 6; | |
85 | value = led->new_brightness >> 3; | |
86 | mask = 0x1f; | |
7fdcef8a | 87 | break; |
ae6cdb03 AS |
88 | case MC13892_LED_MD: |
89 | reg = MC13XXX_REG_LED_CONTROL(0); | |
90 | shift = 3; | |
91 | mask = 0x3f; | |
92 | value = led->new_brightness >> 2; | |
93 | break; | |
94 | case MC13892_LED_AD: | |
95 | reg = MC13XXX_REG_LED_CONTROL(0); | |
96 | shift = 15; | |
97 | mask = 0x3f; | |
98 | value = led->new_brightness >> 2; | |
99 | break; | |
100 | case MC13892_LED_KP: | |
101 | reg = MC13XXX_REG_LED_CONTROL(1); | |
102 | shift = 3; | |
103 | mask = 0x3f; | |
104 | value = led->new_brightness >> 2; | |
105 | break; | |
106 | case MC13892_LED_R: | |
107 | case MC13892_LED_G: | |
108 | case MC13892_LED_B: | |
109 | off = led->id - MC13892_LED_R; | |
110 | bank = off / 2; | |
111 | reg = MC13XXX_REG_LED_CONTROL(2) + bank; | |
112 | shift = (off - bank * 2) * 12 + 3; | |
113 | value = led->new_brightness >> 2; | |
114 | mask = 0x3f; | |
115 | break; | |
9d263813 AS |
116 | default: |
117 | BUG(); | |
7fdcef8a PR |
118 | } |
119 | ||
9d263813 | 120 | mc13xxx_reg_rmw(led->master, reg, mask << shift, value << shift); |
7fdcef8a PR |
121 | } |
122 | ||
9d263813 AS |
123 | static void mc13xxx_led_set(struct led_classdev *led_cdev, |
124 | enum led_brightness value) | |
7fdcef8a | 125 | { |
9d263813 AS |
126 | struct mc13xxx_led *led = |
127 | container_of(led_cdev, struct mc13xxx_led, cdev); | |
7fdcef8a | 128 | |
7fdcef8a PR |
129 | led->new_brightness = value; |
130 | schedule_work(&led->work); | |
131 | } | |
132 | ||
9d263813 | 133 | static int __init mc13xxx_led_probe(struct platform_device *pdev) |
7fdcef8a | 134 | { |
52b7ad3a | 135 | struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev); |
9d263813 AS |
136 | struct mc13xxx *mcdev = dev_get_drvdata(pdev->dev.parent); |
137 | struct mc13xxx_led_devtype *devtype = | |
138 | (struct mc13xxx_led_devtype *)pdev->id_entry->driver_data; | |
139 | struct mc13xxx_leds *leds; | |
cf3b1c2b | 140 | int i, id, num_leds, ret = -ENODATA; |
9d263813 AS |
141 | u32 reg, init_led = 0; |
142 | ||
143 | if (!pdata) { | |
144 | dev_err(&pdev->dev, "Missing platform data\n"); | |
7fdcef8a PR |
145 | return -ENODEV; |
146 | } | |
147 | ||
9d263813 AS |
148 | num_leds = pdata->num_leds; |
149 | ||
150 | if ((num_leds < 1) || | |
151 | (num_leds > (devtype->led_max - devtype->led_min + 1))) { | |
152 | dev_err(&pdev->dev, "Invalid LED count %d\n", num_leds); | |
7fdcef8a PR |
153 | return -EINVAL; |
154 | } | |
155 | ||
9d263813 AS |
156 | leds = devm_kzalloc(&pdev->dev, num_leds * sizeof(struct mc13xxx_led) + |
157 | sizeof(struct mc13xxx_leds), GFP_KERNEL); | |
158 | if (!leds) | |
7fdcef8a | 159 | return -ENOMEM; |
9d263813 AS |
160 | |
161 | leds->devtype = devtype; | |
162 | leds->num_leds = num_leds; | |
163 | platform_set_drvdata(pdev, leds); | |
164 | ||
9d263813 AS |
165 | for (i = 0; i < devtype->num_regs; i++) { |
166 | reg = pdata->led_control[i]; | |
167 | WARN_ON(reg >= (1 << 24)); | |
168 | ret = mc13xxx_reg_write(mcdev, MC13XXX_REG_LED_CONTROL(i), reg); | |
169 | if (ret) | |
3df22c06 | 170 | return ret; |
7fdcef8a PR |
171 | } |
172 | ||
9d263813 AS |
173 | for (i = 0; i < num_leds; i++) { |
174 | const char *name, *trig; | |
7fdcef8a | 175 | |
9d263813 AS |
176 | ret = -EINVAL; |
177 | ||
178 | id = pdata->led[i].id; | |
179 | name = pdata->led[i].name; | |
180 | trig = pdata->led[i].default_trigger; | |
9d263813 AS |
181 | |
182 | if ((id > devtype->led_max) || (id < devtype->led_min)) { | |
183 | dev_err(&pdev->dev, "Invalid ID %i\n", id); | |
184 | break; | |
7fdcef8a PR |
185 | } |
186 | ||
9d263813 AS |
187 | if (init_led & (1 << id)) { |
188 | dev_warn(&pdev->dev, | |
189 | "LED %i already initialized\n", id); | |
190 | break; | |
7fdcef8a PR |
191 | } |
192 | ||
9d263813 AS |
193 | init_led |= 1 << id; |
194 | leds->led[i].id = id; | |
195 | leds->led[i].master = mcdev; | |
196 | leds->led[i].cdev.name = name; | |
197 | leds->led[i].cdev.default_trigger = trig; | |
198 | leds->led[i].cdev.brightness_set = mc13xxx_led_set; | |
199 | leds->led[i].cdev.brightness = LED_OFF; | |
7fdcef8a | 200 | |
9d263813 | 201 | INIT_WORK(&leds->led[i].work, mc13xxx_led_work); |
7fdcef8a | 202 | |
9d263813 AS |
203 | ret = led_classdev_register(pdev->dev.parent, |
204 | &leds->led[i].cdev); | |
7fdcef8a | 205 | if (ret) { |
9d263813 AS |
206 | dev_err(&pdev->dev, "Failed to register LED %i\n", id); |
207 | break; | |
7fdcef8a PR |
208 | } |
209 | } | |
210 | ||
9d263813 AS |
211 | if (ret) |
212 | while (--i >= 0) { | |
213 | led_classdev_unregister(&leds->led[i].cdev); | |
214 | cancel_work_sync(&leds->led[i].work); | |
215 | } | |
7fdcef8a | 216 | |
7fdcef8a PR |
217 | return ret; |
218 | } | |
219 | ||
9d263813 | 220 | static int mc13xxx_led_remove(struct platform_device *pdev) |
7fdcef8a | 221 | { |
9d263813 AS |
222 | struct mc13xxx *mcdev = dev_get_drvdata(pdev->dev.parent); |
223 | struct mc13xxx_leds *leds = platform_get_drvdata(pdev); | |
7fdcef8a PR |
224 | int i; |
225 | ||
9d263813 AS |
226 | for (i = 0; i < leds->num_leds; i++) { |
227 | led_classdev_unregister(&leds->led[i].cdev); | |
228 | cancel_work_sync(&leds->led[i].work); | |
7fdcef8a PR |
229 | } |
230 | ||
9d263813 AS |
231 | for (i = 0; i < leds->devtype->num_regs; i++) |
232 | mc13xxx_reg_write(mcdev, MC13XXX_REG_LED_CONTROL(i), 0); | |
7fdcef8a | 233 | |
7fdcef8a PR |
234 | return 0; |
235 | } | |
236 | ||
9d263813 AS |
237 | static const struct mc13xxx_led_devtype mc13783_led_devtype = { |
238 | .led_min = MC13783_LED_MD, | |
239 | .led_max = MC13783_LED_B3, | |
240 | .num_regs = 6, | |
241 | }; | |
242 | ||
ae6cdb03 AS |
243 | static const struct mc13xxx_led_devtype mc13892_led_devtype = { |
244 | .led_min = MC13892_LED_MD, | |
245 | .led_max = MC13892_LED_B, | |
246 | .num_regs = 4, | |
247 | }; | |
248 | ||
9d263813 AS |
249 | static const struct platform_device_id mc13xxx_led_id_table[] = { |
250 | { "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, }, | |
ae6cdb03 | 251 | { "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, }, |
9d263813 AS |
252 | { } |
253 | }; | |
254 | MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table); | |
255 | ||
256 | static struct platform_driver mc13xxx_led_driver = { | |
7fdcef8a | 257 | .driver = { |
9d263813 | 258 | .name = "mc13xxx-led", |
7fdcef8a PR |
259 | .owner = THIS_MODULE, |
260 | }, | |
9d263813 AS |
261 | .remove = mc13xxx_led_remove, |
262 | .id_table = mc13xxx_led_id_table, | |
7fdcef8a | 263 | }; |
9d263813 | 264 | module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe); |
7fdcef8a | 265 | |
9d263813 | 266 | MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC"); |
7fdcef8a PR |
267 | MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>"); |
268 | MODULE_LICENSE("GPL"); |