1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
|
/*
* LEDs driver for Freescale MC13783
*
* Copyright (C) 2010 Philippe Rétornaz
*
* Based on leds-da903x:
* Copyright (C) 2008 Compulab, Ltd.
* Mike Rapoport <mike@compulab.co.il>
*
* Copyright (C) 2006-2008 Marvell International Ltd.
* Eric Miao <eric.miao@marvell.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/leds.h>
#include <linux/workqueue.h>
#include <linux/mfd/mc13xxx.h>
#include <linux/slab.h>
struct mc13783_led {
struct led_classdev cdev;
struct work_struct work;
struct mc13xxx *master;
enum led_brightness new_brightness;
int id;
};
#define MC13783_REG_LED_CONTROL_0 51
#define MC13783_LED_C0_ENABLE_BIT (1 << 0)
#define MC13783_LED_C0_TRIODE_MD_BIT (1 << 7)
#define MC13783_LED_C0_TRIODE_AD_BIT (1 << 8)
#define MC13783_LED_C0_TRIODE_KP_BIT (1 << 9)
#define MC13783_LED_C0_BOOST_BIT (1 << 10)
#define MC13783_LED_C0_ABMODE_MASK 0x7
#define MC13783_LED_C0_ABMODE 11
#define MC13783_LED_C0_ABREF_MASK 0x3
#define MC13783_LED_C0_ABREF 14
#define MC13783_REG_LED_CONTROL_1 52
#define MC13783_LED_C1_TC1HALF_BIT (1 << 18)
#define MC13783_REG_LED_CONTROL_2 53
#define MC13783_LED_C2_BL_P_MASK 0xf
#define MC13783_LED_C2_MD_P 9
#define MC13783_LED_C2_AD_P 13
#define MC13783_LED_C2_KP_P 17
#define MC13783_LED_C2_BL_C_MASK 0x7
#define MC13783_LED_C2_MD_C 0
#define MC13783_LED_C2_AD_C 3
#define MC13783_LED_C2_KP_C 6
#define MC13783_REG_LED_CONTROL_3 54
#define MC13783_LED_C3_TC_P 6
#define MC13783_LED_C3_TC_P_MASK 0x1f
#define MC13783_REG_LED_CONTROL_4 55
#define MC13783_REG_LED_CONTROL_5 56
#define MC13783_LED_Cx_PERIOD 21
#define MC13783_LED_Cx_PERIOD_MASK 0x3
#define MC13783_LED_Cx_SLEWLIM_BIT (1 << 23)
#define MC13783_LED_Cx_TRIODE_TC_BIT (1 << 23)
#define MC13783_LED_Cx_TC_C_MASK 0x3
static void mc13783_led_work(struct work_struct *work)
{
struct mc13783_led *led = container_of(work, struct mc13783_led, work);
int reg = 0;
int mask = 0;
int value = 0;
int bank, off, shift;
switch (led->id) {
case MC13783_LED_MD:
reg = MC13783_REG_LED_CONTROL_2;
mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_MD_P;
value = (led->new_brightness >> 4) << MC13783_LED_C2_MD_P;
break;
case MC13783_LED_AD:
reg = MC13783_REG_LED_CONTROL_2;
mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_AD_P;
value = (led->new_brightness >> 4) << MC13783_LED_C2_AD_P;
break;
case MC13783_LED_KP:
reg = MC13783_REG_LED_CONTROL_2;
mask = MC13783_LED_C2_BL_P_MASK << MC13783_LED_C2_KP_P;
value = (led->new_brightness >> 4) << MC13783_LED_C2_KP_P;
break;
case MC13783_LED_R1:
case MC13783_LED_G1:
case MC13783_LED_B1:
case MC13783_LED_R2:
case MC13783_LED_G2:
case MC13783_LED_B2:
case MC13783_LED_R3:
case MC13783_LED_G3:
case MC13783_LED_B3:
off = led->id - MC13783_LED_R1;
bank = off/3;
reg = MC13783_REG_LED_CONTROL_3 + off/3;
shift = (off - bank * 3) * 5 + MC13783_LED_C3_TC_P;
value = (led->new_brightness >> 3) << shift;
mask = MC13783_LED_C3_TC_P_MASK << shift;
break;
}
mc13xxx_lock(led->master);
mc13xxx_reg_rmw(led->master, reg, mask, value);
mc13xxx_unlock(led->master);
}
static void mc13783_led_set(struct led_classdev *led_cdev,
enum led_brightness value)
{
struct mc13783_led *led;
led = container_of(led_cdev, struct mc13783_led, cdev);
led->new_brightness = value;
schedule_work(&led->work);
}
static int __devinit mc13783_led_setup(struct mc13783_led *led, int max_current)
{
int shift = 0;
int mask = 0;
int value = 0;
int reg = 0;
int ret, bank;
switch (led->id) {
case MC13783_LED_MD:
shift = MC13783_LED_C2_MD_C;
mask = MC13783_LED_C2_BL_C_MASK;
value = max_current & MC13783_LED_C2_BL_C_MASK;
reg = MC13783_REG_LED_CONTROL_2;
break;
case MC13783_LED_AD:
shift = MC13783_LED_C2_AD_C;
mask = MC13783_LED_C2_BL_C_MASK;
value = max_current & MC13783_LED_C2_BL_C_MASK;
reg = MC13783_REG_LED_CONTROL_2;
break;
case MC13783_LED_KP:
shift = MC13783_LED_C2_KP_C;
mask = MC13783_LED_C2_BL_C_MASK;
value = max_current & MC13783_LED_C2_BL_C_MASK;
reg = MC13783_REG_LED_CONTROL_2;
break;
case MC13783_LED_R1:
case MC13783_LED_G1:
case MC13783_LED_B1:
case MC13783_LED_R2:
case MC13783_LED_G2:
case MC13783_LED_B2:
case MC13783_LED_R3:
case MC13783_LED_G3:
case MC13783_LED_B3:
bank = (led->id - MC13783_LED_R1)/3;
reg = MC13783_REG_LED_CONTROL_3 + bank;
shift = ((led->id - MC13783_LED_R1) - bank * 3) * 2;
mask = MC13783_LED_Cx_TC_C_MASK;
value = max_current & MC13783_LED_Cx_TC_C_MASK;
break;
}
mc13xxx_lock(led->master);
ret = mc13xxx_reg_rmw(led->master, reg, mask << shift,
value << shift);
mc13xxx_unlock(led->master);
return ret;
}
static int __devinit mc13783_leds_prepare(struct platform_device *pdev)
{
struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
int ret = 0;
int reg = 0;
mc13xxx_lock(dev);
if (pdata->flags & MC13783_LED_TC1HALF)
reg |= MC13783_LED_C1_TC1HALF_BIT;
if (pdata->flags & MC13783_LED_SLEWLIMTC)
reg |= MC13783_LED_Cx_SLEWLIM_BIT;
ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, reg);
if (ret)
goto out;
reg = (pdata->bl_period & MC13783_LED_Cx_PERIOD_MASK) <<
MC13783_LED_Cx_PERIOD;
if (pdata->flags & MC13783_LED_SLEWLIMBL)
reg |= MC13783_LED_Cx_SLEWLIM_BIT;
ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, reg);
if (ret)
goto out;
reg = (pdata->tc1_period & MC13783_LED_Cx_PERIOD_MASK) <<
MC13783_LED_Cx_PERIOD;
if (pdata->flags & MC13783_LED_TRIODE_TC1)
reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, reg);
if (ret)
goto out;
reg = (pdata->tc2_period & MC13783_LED_Cx_PERIOD_MASK) <<
MC13783_LED_Cx_PERIOD;
if (pdata->flags & MC13783_LED_TRIODE_TC2)
reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, reg);
if (ret)
goto out;
reg = (pdata->tc3_period & MC13783_LED_Cx_PERIOD_MASK) <<
MC13783_LED_Cx_PERIOD;
if (pdata->flags & MC13783_LED_TRIODE_TC3)
reg |= MC13783_LED_Cx_TRIODE_TC_BIT;
ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, reg);
if (ret)
goto out;
reg = MC13783_LED_C0_ENABLE_BIT;
if (pdata->flags & MC13783_LED_TRIODE_MD)
reg |= MC13783_LED_C0_TRIODE_MD_BIT;
if (pdata->flags & MC13783_LED_TRIODE_AD)
reg |= MC13783_LED_C0_TRIODE_AD_BIT;
if (pdata->flags & MC13783_LED_TRIODE_KP)
reg |= MC13783_LED_C0_TRIODE_KP_BIT;
if (pdata->flags & MC13783_LED_BOOST_EN)
reg |= MC13783_LED_C0_BOOST_BIT;
reg |= (pdata->abmode & MC13783_LED_C0_ABMODE_MASK) <<
MC13783_LED_C0_ABMODE;
reg |= (pdata->abref & MC13783_LED_C0_ABREF_MASK) <<
MC13783_LED_C0_ABREF;
ret = mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, reg);
out:
mc13xxx_unlock(dev);
return ret;
}
static int __devinit mc13783_led_probe(struct platform_device *pdev)
{
struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct mc13xxx_led_platform_data *led_cur;
struct mc13783_led *led, *led_dat;
int ret, i;
int init_led = 0;
if (pdata == NULL) {
dev_err(&pdev->dev, "missing platform data\n");
return -ENODEV;
}
if (pdata->num_leds < 1 || pdata->num_leds > (MC13783_LED_MAX + 1)) {
dev_err(&pdev->dev, "Invalid led count %d\n", pdata->num_leds);
return -EINVAL;
}
led = kcalloc(pdata->num_leds, sizeof(*led), GFP_KERNEL);
if (led == NULL) {
dev_err(&pdev->dev, "failed to alloc memory\n");
return -ENOMEM;
}
ret = mc13783_leds_prepare(pdev);
if (ret) {
dev_err(&pdev->dev, "unable to init led driver\n");
goto err_free;
}
for (i = 0; i < pdata->num_leds; i++) {
led_dat = &led[i];
led_cur = &pdata->led[i];
if (led_cur->id > MC13783_LED_MAX || led_cur->id < 0) {
dev_err(&pdev->dev, "invalid id %d\n", led_cur->id);
ret = -EINVAL;
goto err_register;
}
if (init_led & (1 << led_cur->id)) {
dev_err(&pdev->dev, "led %d already initialized\n",
led_cur->id);
ret = -EINVAL;
goto err_register;
}
init_led |= 1 << led_cur->id;
led_dat->cdev.name = led_cur->name;
led_dat->cdev.default_trigger = led_cur->default_trigger;
led_dat->cdev.brightness_set = mc13783_led_set;
led_dat->cdev.brightness = LED_OFF;
led_dat->id = led_cur->id;
led_dat->master = dev_get_drvdata(pdev->dev.parent);
INIT_WORK(&led_dat->work, mc13783_led_work);
ret = led_classdev_register(pdev->dev.parent, &led_dat->cdev);
if (ret) {
dev_err(&pdev->dev, "failed to register led %d\n",
led_dat->id);
goto err_register;
}
ret = mc13783_led_setup(led_dat, led_cur->max_current);
if (ret) {
dev_err(&pdev->dev, "unable to init led %d\n",
led_dat->id);
i++;
goto err_register;
}
}
platform_set_drvdata(pdev, led);
return 0;
err_register:
for (i = i - 1; i >= 0; i--) {
led_classdev_unregister(&led[i].cdev);
cancel_work_sync(&led[i].work);
}
err_free:
kfree(led);
return ret;
}
static int __devexit mc13783_led_remove(struct platform_device *pdev)
{
struct mc13xxx_leds_platform_data *pdata = dev_get_platdata(&pdev->dev);
struct mc13783_led *led = platform_get_drvdata(pdev);
struct mc13xxx *dev = dev_get_drvdata(pdev->dev.parent);
int i;
for (i = 0; i < pdata->num_leds; i++) {
led_classdev_unregister(&led[i].cdev);
cancel_work_sync(&led[i].work);
}
mc13xxx_lock(dev);
mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_0, 0);
mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_1, 0);
mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_2, 0);
mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_3, 0);
mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_4, 0);
mc13xxx_reg_write(dev, MC13783_REG_LED_CONTROL_5, 0);
mc13xxx_unlock(dev);
platform_set_drvdata(pdev, NULL);
kfree(led);
return 0;
}
static struct platform_driver mc13783_led_driver = {
.driver = {
.name = "mc13783-led",
.owner = THIS_MODULE,
},
.probe = mc13783_led_probe,
.remove = __devexit_p(mc13783_led_remove),
};
module_platform_driver(mc13783_led_driver);
MODULE_DESCRIPTION("LEDs driver for Freescale MC13783 PMIC");
MODULE_AUTHOR("Philippe Retornaz <philippe.retornaz@epfl.ch>");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mc13783-led");
|
