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Commit | Line | Data |
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7fdcef8a | 1 | /* |
a59ce658 | 2 | * LEDs driver for Freescale MC13783/MC13892/MC34708 |
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> | |
7fdcef8a PR |
20 | #include <linux/platform_device.h> |
21 | #include <linux/leds.h> | |
25c6579f | 22 | #include <linux/of.h> |
f3ca0782 | 23 | #include <linux/mfd/mc13xxx.h> |
7fdcef8a | 24 | |
9d263813 AS |
25 | struct mc13xxx_led_devtype { |
26 | int led_min; | |
27 | int led_max; | |
28 | int num_regs; | |
a59ce658 | 29 | u32 ledctrl_base; |
9d263813 AS |
30 | }; |
31 | ||
32 | struct mc13xxx_led { | |
7fdcef8a | 33 | struct led_classdev cdev; |
7fdcef8a | 34 | int id; |
a59ce658 | 35 | struct mc13xxx_leds *leds; |
7fdcef8a PR |
36 | }; |
37 | ||
9d263813 | 38 | struct mc13xxx_leds { |
a59ce658 | 39 | struct mc13xxx *master; |
9d263813 AS |
40 | struct mc13xxx_led_devtype *devtype; |
41 | int num_leds; | |
25c6579f | 42 | struct mc13xxx_led *led; |
9d263813 AS |
43 | }; |
44 | ||
677d13f2 AS |
45 | static unsigned int mc13xxx_max_brightness(int id) |
46 | { | |
47 | if (id >= MC13783_LED_MD && id <= MC13783_LED_KP) | |
48 | return 0x0f; | |
49 | else if (id >= MC13783_LED_R1 && id <= MC13783_LED_B3) | |
50 | return 0x1f; | |
51 | ||
52 | return 0x3f; | |
53 | } | |
54 | ||
4330f2f2 AL |
55 | static int mc13xxx_led_set(struct led_classdev *led_cdev, |
56 | enum led_brightness value) | |
7fdcef8a | 57 | { |
4330f2f2 AL |
58 | struct mc13xxx_led *led = |
59 | container_of(led_cdev, struct mc13xxx_led, cdev); | |
a59ce658 | 60 | struct mc13xxx_leds *leds = led->leds; |
677d13f2 | 61 | unsigned int reg, bank, off, shift; |
7fdcef8a PR |
62 | |
63 | switch (led->id) { | |
64 | case MC13783_LED_MD: | |
7fdcef8a | 65 | case MC13783_LED_AD: |
7fdcef8a | 66 | case MC13783_LED_KP: |
a59ce658 AS |
67 | reg = 2; |
68 | shift = 9 + (led->id - MC13783_LED_MD) * 4; | |
7fdcef8a PR |
69 | break; |
70 | case MC13783_LED_R1: | |
71 | case MC13783_LED_G1: | |
72 | case MC13783_LED_B1: | |
73 | case MC13783_LED_R2: | |
74 | case MC13783_LED_G2: | |
75 | case MC13783_LED_B2: | |
76 | case MC13783_LED_R3: | |
77 | case MC13783_LED_G3: | |
78 | case MC13783_LED_B3: | |
79 | off = led->id - MC13783_LED_R1; | |
9d263813 | 80 | bank = off / 3; |
a59ce658 | 81 | reg = 3 + bank; |
9d263813 | 82 | shift = (off - bank * 3) * 5 + 6; |
7fdcef8a | 83 | break; |
ae6cdb03 | 84 | case MC13892_LED_MD: |
ae6cdb03 | 85 | case MC13892_LED_AD: |
ae6cdb03 | 86 | case MC13892_LED_KP: |
cce35f35 AK |
87 | off = led->id - MC13892_LED_MD; |
88 | reg = off / 2; | |
89 | shift = 3 + (off - reg * 2) * 12; | |
ae6cdb03 AS |
90 | break; |
91 | case MC13892_LED_R: | |
92 | case MC13892_LED_G: | |
93 | case MC13892_LED_B: | |
94 | off = led->id - MC13892_LED_R; | |
95 | bank = off / 2; | |
a59ce658 | 96 | reg = 2 + bank; |
ae6cdb03 | 97 | shift = (off - bank * 2) * 12 + 3; |
ae6cdb03 | 98 | break; |
a59ce658 AS |
99 | case MC34708_LED_R: |
100 | case MC34708_LED_G: | |
101 | reg = 0; | |
102 | shift = 3 + (led->id - MC34708_LED_R) * 12; | |
a59ce658 | 103 | break; |
9d263813 AS |
104 | default: |
105 | BUG(); | |
7fdcef8a PR |
106 | } |
107 | ||
4330f2f2 | 108 | return mc13xxx_reg_rmw(leds->master, leds->devtype->ledctrl_base + reg, |
677d13f2 | 109 | mc13xxx_max_brightness(led->id) << shift, |
4330f2f2 | 110 | value << shift); |
7fdcef8a PR |
111 | } |
112 | ||
25c6579f AS |
113 | #ifdef CONFIG_OF |
114 | static struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt( | |
115 | struct platform_device *pdev) | |
116 | { | |
117 | struct mc13xxx_leds *leds = platform_get_drvdata(pdev); | |
118 | struct mc13xxx_leds_platform_data *pdata; | |
119 | struct device_node *parent, *child; | |
120 | struct device *dev = &pdev->dev; | |
121 | int i = 0, ret = -ENODATA; | |
122 | ||
123 | pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); | |
124 | if (!pdata) | |
125 | return ERR_PTR(-ENOMEM); | |
126 | ||
452bc149 | 127 | parent = of_get_child_by_name(dev->parent->of_node, "leds"); |
25c6579f AS |
128 | if (!parent) |
129 | goto out_node_put; | |
130 | ||
131 | ret = of_property_read_u32_array(parent, "led-control", | |
132 | pdata->led_control, | |
133 | leds->devtype->num_regs); | |
134 | if (ret) | |
135 | goto out_node_put; | |
136 | ||
137 | pdata->num_leds = of_get_child_count(parent); | |
138 | ||
139 | pdata->led = devm_kzalloc(dev, pdata->num_leds * sizeof(*pdata->led), | |
140 | GFP_KERNEL); | |
141 | if (!pdata->led) { | |
142 | ret = -ENOMEM; | |
143 | goto out_node_put; | |
144 | } | |
145 | ||
146 | for_each_child_of_node(parent, child) { | |
147 | const char *str; | |
148 | u32 tmp; | |
149 | ||
150 | if (of_property_read_u32(child, "reg", &tmp)) | |
151 | continue; | |
152 | pdata->led[i].id = leds->devtype->led_min + tmp; | |
153 | ||
154 | if (!of_property_read_string(child, "label", &str)) | |
155 | pdata->led[i].name = str; | |
156 | if (!of_property_read_string(child, "linux,default-trigger", | |
157 | &str)) | |
158 | pdata->led[i].default_trigger = str; | |
159 | ||
160 | i++; | |
161 | } | |
162 | ||
163 | pdata->num_leds = i; | |
164 | ret = i > 0 ? 0 : -ENODATA; | |
165 | ||
166 | out_node_put: | |
167 | of_node_put(parent); | |
168 | ||
169 | return ret ? ERR_PTR(ret) : pdata; | |
170 | } | |
171 | #else | |
172 | static inline struct mc13xxx_leds_platform_data __init *mc13xxx_led_probe_dt( | |
173 | struct platform_device *pdev) | |
174 | { | |
175 | return ERR_PTR(-ENOSYS); | |
176 | } | |
177 | #endif | |
178 | ||
9d263813 | 179 | static int __init mc13xxx_led_probe(struct platform_device *pdev) |
7fdcef8a | 180 | { |
a59ce658 AS |
181 | struct device *dev = &pdev->dev; |
182 | struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(dev); | |
183 | struct mc13xxx *mcdev = dev_get_drvdata(dev->parent); | |
9d263813 AS |
184 | struct mc13xxx_led_devtype *devtype = |
185 | (struct mc13xxx_led_devtype *)pdev->id_entry->driver_data; | |
186 | struct mc13xxx_leds *leds; | |
25c6579f | 187 | int i, id, ret = -ENODATA; |
a59ce658 | 188 | u32 init_led = 0; |
9d263813 | 189 | |
25c6579f | 190 | leds = devm_kzalloc(dev, sizeof(*leds), GFP_KERNEL); |
9d263813 | 191 | if (!leds) |
7fdcef8a | 192 | return -ENOMEM; |
9d263813 AS |
193 | |
194 | leds->devtype = devtype; | |
a59ce658 | 195 | leds->master = mcdev; |
9d263813 AS |
196 | platform_set_drvdata(pdev, leds); |
197 | ||
25c6579f AS |
198 | if (dev->parent->of_node) { |
199 | pdata = mc13xxx_led_probe_dt(pdev); | |
200 | if (IS_ERR(pdata)) | |
201 | return PTR_ERR(pdata); | |
202 | } else if (!pdata) | |
203 | return -ENODATA; | |
204 | ||
205 | leds->num_leds = pdata->num_leds; | |
206 | ||
207 | if ((leds->num_leds < 1) || | |
208 | (leds->num_leds > (devtype->led_max - devtype->led_min + 1))) { | |
209 | dev_err(dev, "Invalid LED count %d\n", leds->num_leds); | |
210 | return -EINVAL; | |
211 | } | |
212 | ||
213 | leds->led = devm_kzalloc(dev, leds->num_leds * sizeof(*leds->led), | |
214 | GFP_KERNEL); | |
215 | if (!leds->led) | |
216 | return -ENOMEM; | |
217 | ||
9d263813 | 218 | for (i = 0; i < devtype->num_regs; i++) { |
a59ce658 AS |
219 | ret = mc13xxx_reg_write(mcdev, leds->devtype->ledctrl_base + i, |
220 | pdata->led_control[i]); | |
9d263813 | 221 | if (ret) |
3df22c06 | 222 | return ret; |
7fdcef8a PR |
223 | } |
224 | ||
25c6579f | 225 | for (i = 0; i < leds->num_leds; i++) { |
9d263813 | 226 | const char *name, *trig; |
7fdcef8a | 227 | |
9d263813 AS |
228 | ret = -EINVAL; |
229 | ||
230 | id = pdata->led[i].id; | |
231 | name = pdata->led[i].name; | |
232 | trig = pdata->led[i].default_trigger; | |
9d263813 AS |
233 | |
234 | if ((id > devtype->led_max) || (id < devtype->led_min)) { | |
a59ce658 | 235 | dev_err(dev, "Invalid ID %i\n", id); |
9d263813 | 236 | break; |
7fdcef8a PR |
237 | } |
238 | ||
9d263813 | 239 | if (init_led & (1 << id)) { |
a59ce658 | 240 | dev_warn(dev, "LED %i already initialized\n", id); |
9d263813 | 241 | break; |
7fdcef8a PR |
242 | } |
243 | ||
9d263813 AS |
244 | init_led |= 1 << id; |
245 | leds->led[i].id = id; | |
a59ce658 | 246 | leds->led[i].leds = leds; |
9d263813 AS |
247 | leds->led[i].cdev.name = name; |
248 | leds->led[i].cdev.default_trigger = trig; | |
02e9e11e | 249 | leds->led[i].cdev.flags = LED_CORE_SUSPENDRESUME; |
4330f2f2 | 250 | leds->led[i].cdev.brightness_set_blocking = mc13xxx_led_set; |
677d13f2 | 251 | leds->led[i].cdev.max_brightness = mc13xxx_max_brightness(id); |
7fdcef8a | 252 | |
a59ce658 | 253 | ret = led_classdev_register(dev->parent, &leds->led[i].cdev); |
7fdcef8a | 254 | if (ret) { |
a59ce658 | 255 | dev_err(dev, "Failed to register LED %i\n", id); |
9d263813 | 256 | break; |
7fdcef8a PR |
257 | } |
258 | } | |
259 | ||
9d263813 | 260 | if (ret) |
4330f2f2 | 261 | while (--i >= 0) |
9d263813 | 262 | led_classdev_unregister(&leds->led[i].cdev); |
7fdcef8a | 263 | |
7fdcef8a PR |
264 | return ret; |
265 | } | |
266 | ||
9d263813 | 267 | static int mc13xxx_led_remove(struct platform_device *pdev) |
7fdcef8a | 268 | { |
9d263813 | 269 | struct mc13xxx_leds *leds = platform_get_drvdata(pdev); |
7fdcef8a PR |
270 | int i; |
271 | ||
4330f2f2 | 272 | for (i = 0; i < leds->num_leds; i++) |
9d263813 | 273 | led_classdev_unregister(&leds->led[i].cdev); |
7fdcef8a | 274 | |
7fdcef8a PR |
275 | return 0; |
276 | } | |
277 | ||
9d263813 AS |
278 | static const struct mc13xxx_led_devtype mc13783_led_devtype = { |
279 | .led_min = MC13783_LED_MD, | |
280 | .led_max = MC13783_LED_B3, | |
281 | .num_regs = 6, | |
a59ce658 | 282 | .ledctrl_base = 51, |
9d263813 AS |
283 | }; |
284 | ||
ae6cdb03 AS |
285 | static const struct mc13xxx_led_devtype mc13892_led_devtype = { |
286 | .led_min = MC13892_LED_MD, | |
287 | .led_max = MC13892_LED_B, | |
288 | .num_regs = 4, | |
a59ce658 AS |
289 | .ledctrl_base = 51, |
290 | }; | |
291 | ||
292 | static const struct mc13xxx_led_devtype mc34708_led_devtype = { | |
293 | .led_min = MC34708_LED_R, | |
294 | .led_max = MC34708_LED_G, | |
295 | .num_regs = 1, | |
296 | .ledctrl_base = 54, | |
ae6cdb03 AS |
297 | }; |
298 | ||
9d263813 AS |
299 | static const struct platform_device_id mc13xxx_led_id_table[] = { |
300 | { "mc13783-led", (kernel_ulong_t)&mc13783_led_devtype, }, | |
ae6cdb03 | 301 | { "mc13892-led", (kernel_ulong_t)&mc13892_led_devtype, }, |
a59ce658 | 302 | { "mc34708-led", (kernel_ulong_t)&mc34708_led_devtype, }, |
9d263813 AS |
303 | { } |
304 | }; | |
305 | MODULE_DEVICE_TABLE(platform, mc13xxx_led_id_table); | |
306 | ||
307 | static struct platform_driver mc13xxx_led_driver = { | |
7fdcef8a | 308 | .driver = { |
9d263813 | 309 | .name = "mc13xxx-led", |
7fdcef8a | 310 | }, |
9d263813 AS |
311 | .remove = mc13xxx_led_remove, |
312 | .id_table = mc13xxx_led_id_table, | |
7fdcef8a | 313 | }; |
9d263813 | 314 | module_platform_driver_probe(mc13xxx_led_driver, mc13xxx_led_probe); |
7fdcef8a | 315 | |
9d263813 | 316 | MODULE_DESCRIPTION("LEDs driver for Freescale MC13XXX PMIC"); |
7fdcef8a PR |
317 | MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>"); |
318 | MODULE_LICENSE("GPL"); |