Commit | Line | Data |
---|---|---|
500fe141 SO |
1 | /* |
2 | * LP5521 LED chip driver. | |
3 | * | |
4 | * Copyright (C) 2010 Nokia Corporation | |
a2387cb9 | 5 | * Copyright (C) 2012 Texas Instruments |
500fe141 SO |
6 | * |
7 | * Contact: Samu Onkalo <samu.p.onkalo@nokia.com> | |
a2387cb9 | 8 | * Milo(Woogyom) Kim <milo.kim@ti.com> |
500fe141 SO |
9 | * |
10 | * This program is free software; you can redistribute it and/or | |
11 | * modify it under the terms of the GNU General Public License | |
12 | * version 2 as published by the Free Software Foundation. | |
13 | * | |
14 | * This program is distributed in the hope that it will be useful, but | |
15 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
17 | * General Public License for more details. | |
18 | * | |
19 | * You should have received a copy of the GNU General Public License | |
20 | * along with this program; if not, write to the Free Software | |
21 | * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA | |
22 | * 02110-1301 USA | |
23 | */ | |
24 | ||
500fe141 | 25 | #include <linux/delay.h> |
79bcc10b MWK |
26 | #include <linux/firmware.h> |
27 | #include <linux/i2c.h> | |
28 | #include <linux/init.h> | |
500fe141 | 29 | #include <linux/leds.h> |
79bcc10b MWK |
30 | #include <linux/module.h> |
31 | #include <linux/mutex.h> | |
6a0c9a47 | 32 | #include <linux/platform_data/leds-lp55xx.h> |
79bcc10b | 33 | #include <linux/slab.h> |
7542a04b | 34 | #include <linux/of.h> |
6a0c9a47 MWK |
35 | |
36 | #include "leds-lp55xx-common.h" | |
500fe141 | 37 | |
12f022d2 MWK |
38 | #define LP5521_PROGRAM_LENGTH 32 |
39 | #define LP5521_MAX_LEDS 3 | |
40 | #define LP5521_CMD_DIRECT 0x3F | |
500fe141 SO |
41 | |
42 | /* Registers */ | |
43 | #define LP5521_REG_ENABLE 0x00 | |
44 | #define LP5521_REG_OP_MODE 0x01 | |
45 | #define LP5521_REG_R_PWM 0x02 | |
46 | #define LP5521_REG_G_PWM 0x03 | |
47 | #define LP5521_REG_B_PWM 0x04 | |
48 | #define LP5521_REG_R_CURRENT 0x05 | |
49 | #define LP5521_REG_G_CURRENT 0x06 | |
50 | #define LP5521_REG_B_CURRENT 0x07 | |
51 | #define LP5521_REG_CONFIG 0x08 | |
500fe141 SO |
52 | #define LP5521_REG_STATUS 0x0C |
53 | #define LP5521_REG_RESET 0x0D | |
500fe141 SO |
54 | #define LP5521_REG_R_PROG_MEM 0x10 |
55 | #define LP5521_REG_G_PROG_MEM 0x30 | |
56 | #define LP5521_REG_B_PROG_MEM 0x50 | |
57 | ||
500fe141 SO |
58 | /* Base register to set LED current */ |
59 | #define LP5521_REG_LED_CURRENT_BASE LP5521_REG_R_CURRENT | |
500fe141 SO |
60 | /* Base register to set the brightness */ |
61 | #define LP5521_REG_LED_PWM_BASE LP5521_REG_R_PWM | |
62 | ||
63 | /* Bits in ENABLE register */ | |
64 | #define LP5521_MASTER_ENABLE 0x40 /* Chip master enable */ | |
65 | #define LP5521_LOGARITHMIC_PWM 0x80 /* Logarithmic PWM adjustment */ | |
66 | #define LP5521_EXEC_RUN 0x2A | |
32a2f747 KM |
67 | #define LP5521_ENABLE_DEFAULT \ |
68 | (LP5521_MASTER_ENABLE | LP5521_LOGARITHMIC_PWM) | |
69 | #define LP5521_ENABLE_RUN_PROGRAM \ | |
70 | (LP5521_ENABLE_DEFAULT | LP5521_EXEC_RUN) | |
500fe141 | 71 | |
81f2a5b4 KM |
72 | /* CONFIG register */ |
73 | #define LP5521_PWM_HF 0x40 /* PWM: 0 = 256Hz, 1 = 558Hz */ | |
74 | #define LP5521_PWRSAVE_EN 0x20 /* 1 = Power save mode */ | |
75 | #define LP5521_CP_MODE_OFF 0 /* Charge pump (CP) off */ | |
76 | #define LP5521_CP_MODE_BYPASS 8 /* CP forced to bypass mode */ | |
77 | #define LP5521_CP_MODE_1X5 0x10 /* CP forced to 1.5x mode */ | |
78 | #define LP5521_CP_MODE_AUTO 0x18 /* Automatic mode selection */ | |
79 | #define LP5521_R_TO_BATT 0x04 /* R out: 0 = CP, 1 = Vbat */ | |
80 | #define LP5521_CLK_INT 0x01 /* Internal clock */ | |
81 | #define LP5521_DEFAULT_CFG \ | |
82 | (LP5521_PWM_HF | LP5521_PWRSAVE_EN | LP5521_CP_MODE_AUTO) | |
83 | ||
500fe141 SO |
84 | /* Status */ |
85 | #define LP5521_EXT_CLK_USED 0x08 | |
86 | ||
b3c49c05 SK |
87 | /* default R channel current register value */ |
88 | #define LP5521_REG_R_CURR_DEFAULT 0xAF | |
89 | ||
48068d5d MWK |
90 | /* Reset register value */ |
91 | #define LP5521_RESET 0xFF | |
92 | ||
9ce7cb17 MWK |
93 | /* Program Memory Operations */ |
94 | #define LP5521_MODE_R_M 0x30 /* Operation Mode Register */ | |
95 | #define LP5521_MODE_G_M 0x0C | |
96 | #define LP5521_MODE_B_M 0x03 | |
97 | #define LP5521_LOAD_R 0x10 | |
98 | #define LP5521_LOAD_G 0x04 | |
99 | #define LP5521_LOAD_B 0x01 | |
100 | ||
101 | #define LP5521_R_IS_LOADING(mode) \ | |
102 | ((mode & LP5521_MODE_R_M) == LP5521_LOAD_R) | |
103 | #define LP5521_G_IS_LOADING(mode) \ | |
104 | ((mode & LP5521_MODE_G_M) == LP5521_LOAD_G) | |
105 | #define LP5521_B_IS_LOADING(mode) \ | |
106 | ((mode & LP5521_MODE_B_M) == LP5521_LOAD_B) | |
107 | ||
108 | #define LP5521_EXEC_R_M 0x30 /* Enable Register */ | |
109 | #define LP5521_EXEC_G_M 0x0C | |
110 | #define LP5521_EXEC_B_M 0x03 | |
111 | #define LP5521_EXEC_M 0x3F | |
112 | #define LP5521_RUN_R 0x20 | |
113 | #define LP5521_RUN_G 0x08 | |
114 | #define LP5521_RUN_B 0x02 | |
500fe141 | 115 | |
9ce7cb17 MWK |
116 | static inline void lp5521_wait_opmode_done(void) |
117 | { | |
118 | /* operation mode change needs to be longer than 153 us */ | |
119 | usleep_range(200, 300); | |
120 | } | |
121 | ||
94482174 MWK |
122 | static inline void lp5521_wait_enable_done(void) |
123 | { | |
124 | /* it takes more 488 us to update ENABLE register */ | |
125 | usleep_range(500, 600); | |
126 | } | |
127 | ||
a96bfa13 MWK |
128 | static void lp5521_set_led_current(struct lp55xx_led *led, u8 led_current) |
129 | { | |
130 | led->led_current = led_current; | |
131 | lp55xx_write(led->chip, LP5521_REG_LED_CURRENT_BASE + led->chan_nr, | |
132 | led_current); | |
133 | } | |
134 | ||
9ce7cb17 | 135 | static void lp5521_load_engine(struct lp55xx_chip *chip) |
500fe141 | 136 | { |
9ce7cb17 MWK |
137 | enum lp55xx_engine_index idx = chip->engine_idx; |
138 | u8 mask[] = { | |
139 | [LP55XX_ENGINE_1] = LP5521_MODE_R_M, | |
140 | [LP55XX_ENGINE_2] = LP5521_MODE_G_M, | |
141 | [LP55XX_ENGINE_3] = LP5521_MODE_B_M, | |
142 | }; | |
500fe141 | 143 | |
9ce7cb17 MWK |
144 | u8 val[] = { |
145 | [LP55XX_ENGINE_1] = LP5521_LOAD_R, | |
146 | [LP55XX_ENGINE_2] = LP5521_LOAD_G, | |
147 | [LP55XX_ENGINE_3] = LP5521_LOAD_B, | |
148 | }; | |
500fe141 | 149 | |
9ce7cb17 | 150 | lp55xx_update_bits(chip, LP5521_REG_OP_MODE, mask[idx], val[idx]); |
500fe141 | 151 | |
9ce7cb17 MWK |
152 | lp5521_wait_opmode_done(); |
153 | } | |
500fe141 | 154 | |
9ce7cb17 MWK |
155 | static void lp5521_stop_engine(struct lp55xx_chip *chip) |
156 | { | |
157 | lp55xx_write(chip, LP5521_REG_OP_MODE, 0); | |
158 | lp5521_wait_opmode_done(); | |
500fe141 SO |
159 | } |
160 | ||
9ce7cb17 | 161 | static void lp5521_run_engine(struct lp55xx_chip *chip, bool start) |
500fe141 | 162 | { |
500fe141 | 163 | int ret; |
500fe141 | 164 | u8 mode; |
9ce7cb17 | 165 | u8 exec; |
500fe141 | 166 | |
9ce7cb17 MWK |
167 | /* stop engine */ |
168 | if (!start) { | |
169 | lp5521_stop_engine(chip); | |
170 | lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); | |
171 | lp5521_wait_opmode_done(); | |
172 | return; | |
173 | } | |
174 | ||
175 | /* | |
176 | * To run the engine, | |
177 | * operation mode and enable register should updated at the same time | |
178 | */ | |
179 | ||
180 | ret = lp55xx_read(chip, LP5521_REG_OP_MODE, &mode); | |
5bc9ad77 | 181 | if (ret) |
9ce7cb17 | 182 | return; |
5bc9ad77 | 183 | |
9ce7cb17 | 184 | ret = lp55xx_read(chip, LP5521_REG_ENABLE, &exec); |
5bc9ad77 | 185 | if (ret) |
9ce7cb17 MWK |
186 | return; |
187 | ||
188 | /* change operation mode to RUN only when each engine is loading */ | |
189 | if (LP5521_R_IS_LOADING(mode)) { | |
190 | mode = (mode & ~LP5521_MODE_R_M) | LP5521_RUN_R; | |
191 | exec = (exec & ~LP5521_EXEC_R_M) | LP5521_RUN_R; | |
192 | } | |
193 | ||
194 | if (LP5521_G_IS_LOADING(mode)) { | |
195 | mode = (mode & ~LP5521_MODE_G_M) | LP5521_RUN_G; | |
196 | exec = (exec & ~LP5521_EXEC_G_M) | LP5521_RUN_G; | |
197 | } | |
198 | ||
199 | if (LP5521_B_IS_LOADING(mode)) { | |
200 | mode = (mode & ~LP5521_MODE_B_M) | LP5521_RUN_B; | |
201 | exec = (exec & ~LP5521_EXEC_B_M) | LP5521_RUN_B; | |
202 | } | |
203 | ||
204 | lp55xx_write(chip, LP5521_REG_OP_MODE, mode); | |
205 | lp5521_wait_opmode_done(); | |
206 | ||
207 | lp55xx_update_bits(chip, LP5521_REG_ENABLE, LP5521_EXEC_M, exec); | |
208 | lp5521_wait_enable_done(); | |
209 | } | |
210 | ||
211 | static int lp5521_update_program_memory(struct lp55xx_chip *chip, | |
212 | const u8 *data, size_t size) | |
213 | { | |
214 | enum lp55xx_engine_index idx = chip->engine_idx; | |
215 | u8 pattern[LP5521_PROGRAM_LENGTH] = {0}; | |
216 | u8 addr[] = { | |
217 | [LP55XX_ENGINE_1] = LP5521_REG_R_PROG_MEM, | |
218 | [LP55XX_ENGINE_2] = LP5521_REG_G_PROG_MEM, | |
219 | [LP55XX_ENGINE_3] = LP5521_REG_B_PROG_MEM, | |
220 | }; | |
221 | unsigned cmd; | |
222 | char c[3]; | |
9ce7cb17 | 223 | int nrchars; |
9ce7cb17 | 224 | int ret; |
1eca0b3a MK |
225 | int offset = 0; |
226 | int i = 0; | |
9ce7cb17 | 227 | |
9ce7cb17 MWK |
228 | while ((offset < size - 1) && (i < LP5521_PROGRAM_LENGTH)) { |
229 | /* separate sscanfs because length is working only for %s */ | |
230 | ret = sscanf(data + offset, "%2s%n ", c, &nrchars); | |
231 | if (ret != 1) | |
232 | goto err; | |
233 | ||
234 | ret = sscanf(c, "%2x", &cmd); | |
235 | if (ret != 1) | |
236 | goto err; | |
237 | ||
238 | pattern[i] = (u8)cmd; | |
239 | offset += nrchars; | |
240 | i++; | |
241 | } | |
242 | ||
243 | /* Each instruction is 16bit long. Check that length is even */ | |
244 | if (i % 2) | |
245 | goto err; | |
246 | ||
1eca0b3a | 247 | for (i = 0; i < LP5521_PROGRAM_LENGTH; i++) { |
c0e5e9b5 | 248 | ret = lp55xx_write(chip, addr[idx] + i, pattern[i]); |
e70988d1 | 249 | if (ret) |
c0e5e9b5 | 250 | return -EINVAL; |
c0e5e9b5 MK |
251 | } |
252 | ||
c0e5e9b5 | 253 | return size; |
9ce7cb17 MWK |
254 | |
255 | err: | |
256 | dev_err(&chip->cl->dev, "wrong pattern format\n"); | |
257 | return -EINVAL; | |
258 | } | |
259 | ||
260 | static void lp5521_firmware_loaded(struct lp55xx_chip *chip) | |
261 | { | |
262 | const struct firmware *fw = chip->fw; | |
263 | ||
264 | if (fw->size > LP5521_PROGRAM_LENGTH) { | |
265 | dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n", | |
266 | fw->size); | |
267 | return; | |
268 | } | |
500fe141 | 269 | |
9ce7cb17 MWK |
270 | /* |
271 | * Program momery sequence | |
272 | * 1) set engine mode to "LOAD" | |
273 | * 2) write firmware data into program memory | |
274 | */ | |
275 | ||
276 | lp5521_load_engine(chip); | |
277 | lp5521_update_program_memory(chip, fw->data, fw->size); | |
500fe141 SO |
278 | } |
279 | ||
ffbdccdb | 280 | static int lp5521_post_init_device(struct lp55xx_chip *chip) |
500fe141 | 281 | { |
500fe141 | 282 | int ret; |
94482174 | 283 | u8 val; |
500fe141 | 284 | |
94482174 MWK |
285 | /* |
286 | * Make sure that the chip is reset by reading back the r channel | |
287 | * current reg. This is dummy read is required on some platforms - | |
288 | * otherwise further access to the R G B channels in the | |
289 | * LP5521_REG_ENABLE register will not have any effect - strange! | |
290 | */ | |
ffbdccdb | 291 | ret = lp55xx_read(chip, LP5521_REG_R_CURRENT, &val); |
94482174 | 292 | if (ret) { |
ffbdccdb | 293 | dev_err(&chip->cl->dev, "error in resetting chip\n"); |
94482174 MWK |
294 | return ret; |
295 | } | |
296 | if (val != LP5521_REG_R_CURR_DEFAULT) { | |
ffbdccdb | 297 | dev_err(&chip->cl->dev, |
94482174 MWK |
298 | "unexpected data in register (expected 0x%x got 0x%x)\n", |
299 | LP5521_REG_R_CURR_DEFAULT, val); | |
300 | ret = -EINVAL; | |
301 | return ret; | |
302 | } | |
303 | usleep_range(10000, 20000); | |
500fe141 | 304 | |
500fe141 | 305 | /* Set all PWMs to direct control mode */ |
ffbdccdb | 306 | ret = lp55xx_write(chip, LP5521_REG_OP_MODE, LP5521_CMD_DIRECT); |
500fe141 | 307 | |
81f2a5b4 KM |
308 | /* Update configuration for the clock setting */ |
309 | val = LP5521_DEFAULT_CFG; | |
310 | if (!lp55xx_is_extclk_used(chip)) | |
311 | val |= LP5521_CLK_INT; | |
312 | ||
ffbdccdb | 313 | ret = lp55xx_write(chip, LP5521_REG_CONFIG, val); |
94482174 MWK |
314 | if (ret) |
315 | return ret; | |
500fe141 SO |
316 | |
317 | /* Initialize all channels PWM to zero -> leds off */ | |
ffbdccdb MWK |
318 | lp55xx_write(chip, LP5521_REG_R_PWM, 0); |
319 | lp55xx_write(chip, LP5521_REG_G_PWM, 0); | |
320 | lp55xx_write(chip, LP5521_REG_B_PWM, 0); | |
500fe141 SO |
321 | |
322 | /* Set engines are set to run state when OP_MODE enables engines */ | |
ffbdccdb | 323 | ret = lp55xx_write(chip, LP5521_REG_ENABLE, LP5521_ENABLE_RUN_PROGRAM); |
94482174 MWK |
324 | if (ret) |
325 | return ret; | |
500fe141 | 326 | |
94482174 MWK |
327 | lp5521_wait_enable_done(); |
328 | ||
329 | return 0; | |
500fe141 SO |
330 | } |
331 | ||
9ca3bd80 | 332 | static int lp5521_run_selftest(struct lp55xx_chip *chip, char *buf) |
500fe141 | 333 | { |
9ca3bd80 | 334 | struct lp55xx_platform_data *pdata = chip->pdata; |
500fe141 SO |
335 | int ret; |
336 | u8 status; | |
337 | ||
9ca3bd80 | 338 | ret = lp55xx_read(chip, LP5521_REG_STATUS, &status); |
500fe141 SO |
339 | if (ret < 0) |
340 | return ret; | |
341 | ||
9ca3bd80 MWK |
342 | if (pdata->clock_mode != LP55XX_CLOCK_EXT) |
343 | return 0; | |
344 | ||
500fe141 | 345 | /* Check that ext clock is really in use if requested */ |
9ca3bd80 MWK |
346 | if ((status & LP5521_EXT_CLK_USED) == 0) |
347 | return -EIO; | |
348 | ||
500fe141 SO |
349 | return 0; |
350 | } | |
351 | ||
500fe141 SO |
352 | static void lp5521_led_brightness_work(struct work_struct *work) |
353 | { | |
a6e4679a | 354 | struct lp55xx_led *led = container_of(work, struct lp55xx_led, |
500fe141 | 355 | brightness_work); |
a6e4679a | 356 | struct lp55xx_chip *chip = led->chip; |
500fe141 SO |
357 | |
358 | mutex_lock(&chip->lock); | |
a6e4679a | 359 | lp55xx_write(chip, LP5521_REG_LED_PWM_BASE + led->chan_nr, |
500fe141 SO |
360 | led->brightness); |
361 | mutex_unlock(&chip->lock); | |
362 | } | |
363 | ||
c0e5e9b5 MK |
364 | static ssize_t show_engine_mode(struct device *dev, |
365 | struct device_attribute *attr, | |
366 | char *buf, int nr) | |
367 | { | |
368 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
369 | struct lp55xx_chip *chip = led->chip; | |
370 | enum lp55xx_engine_mode mode = chip->engines[nr - 1].mode; | |
371 | ||
372 | switch (mode) { | |
373 | case LP55XX_ENGINE_RUN: | |
374 | return sprintf(buf, "run\n"); | |
375 | case LP55XX_ENGINE_LOAD: | |
376 | return sprintf(buf, "load\n"); | |
377 | case LP55XX_ENGINE_DISABLED: | |
378 | default: | |
379 | return sprintf(buf, "disabled\n"); | |
380 | } | |
381 | } | |
382 | show_mode(1) | |
383 | show_mode(2) | |
384 | show_mode(3) | |
385 | ||
386 | static ssize_t store_engine_mode(struct device *dev, | |
387 | struct device_attribute *attr, | |
388 | const char *buf, size_t len, int nr) | |
389 | { | |
390 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
391 | struct lp55xx_chip *chip = led->chip; | |
392 | struct lp55xx_engine *engine = &chip->engines[nr - 1]; | |
393 | ||
394 | mutex_lock(&chip->lock); | |
395 | ||
396 | chip->engine_idx = nr; | |
397 | ||
398 | if (!strncmp(buf, "run", 3)) { | |
399 | lp5521_run_engine(chip, true); | |
400 | engine->mode = LP55XX_ENGINE_RUN; | |
401 | } else if (!strncmp(buf, "load", 4)) { | |
402 | lp5521_stop_engine(chip); | |
403 | lp5521_load_engine(chip); | |
404 | engine->mode = LP55XX_ENGINE_LOAD; | |
405 | } else if (!strncmp(buf, "disabled", 8)) { | |
406 | lp5521_stop_engine(chip); | |
407 | engine->mode = LP55XX_ENGINE_DISABLED; | |
408 | } | |
409 | ||
410 | mutex_unlock(&chip->lock); | |
411 | ||
412 | return len; | |
413 | } | |
414 | store_mode(1) | |
415 | store_mode(2) | |
416 | store_mode(3) | |
417 | ||
418 | static ssize_t store_engine_load(struct device *dev, | |
419 | struct device_attribute *attr, | |
420 | const char *buf, size_t len, int nr) | |
421 | { | |
422 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); | |
423 | struct lp55xx_chip *chip = led->chip; | |
e70988d1 | 424 | int ret; |
c0e5e9b5 MK |
425 | |
426 | mutex_lock(&chip->lock); | |
427 | ||
428 | chip->engine_idx = nr; | |
429 | lp5521_load_engine(chip); | |
e70988d1 | 430 | ret = lp5521_update_program_memory(chip, buf, len); |
c0e5e9b5 MK |
431 | |
432 | mutex_unlock(&chip->lock); | |
433 | ||
e70988d1 | 434 | return ret; |
c0e5e9b5 MK |
435 | } |
436 | store_load(1) | |
437 | store_load(2) | |
438 | store_load(3) | |
439 | ||
500fe141 SO |
440 | static ssize_t lp5521_selftest(struct device *dev, |
441 | struct device_attribute *attr, | |
442 | char *buf) | |
443 | { | |
9ca3bd80 MWK |
444 | struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev)); |
445 | struct lp55xx_chip *chip = led->chip; | |
500fe141 SO |
446 | int ret; |
447 | ||
448 | mutex_lock(&chip->lock); | |
449 | ret = lp5521_run_selftest(chip, buf); | |
450 | mutex_unlock(&chip->lock); | |
24d32128 KM |
451 | |
452 | return scnprintf(buf, PAGE_SIZE, "%s\n", ret ? "FAIL" : "OK"); | |
500fe141 SO |
453 | } |
454 | ||
500fe141 | 455 | /* device attributes */ |
c0e5e9b5 MK |
456 | static LP55XX_DEV_ATTR_RW(engine1_mode, show_engine1_mode, store_engine1_mode); |
457 | static LP55XX_DEV_ATTR_RW(engine2_mode, show_engine2_mode, store_engine2_mode); | |
458 | static LP55XX_DEV_ATTR_RW(engine3_mode, show_engine3_mode, store_engine3_mode); | |
459 | static LP55XX_DEV_ATTR_WO(engine1_load, store_engine1_load); | |
460 | static LP55XX_DEV_ATTR_WO(engine2_load, store_engine2_load); | |
461 | static LP55XX_DEV_ATTR_WO(engine3_load, store_engine3_load); | |
462 | static LP55XX_DEV_ATTR_RO(selftest, lp5521_selftest); | |
500fe141 SO |
463 | |
464 | static struct attribute *lp5521_attributes[] = { | |
c0e5e9b5 MK |
465 | &dev_attr_engine1_mode.attr, |
466 | &dev_attr_engine2_mode.attr, | |
467 | &dev_attr_engine3_mode.attr, | |
468 | &dev_attr_engine1_load.attr, | |
469 | &dev_attr_engine2_load.attr, | |
470 | &dev_attr_engine3_load.attr, | |
500fe141 | 471 | &dev_attr_selftest.attr, |
500fe141 SO |
472 | NULL |
473 | }; | |
474 | ||
475 | static const struct attribute_group lp5521_group = { | |
476 | .attrs = lp5521_attributes, | |
477 | }; | |
478 | ||
48068d5d MWK |
479 | /* Chip specific configurations */ |
480 | static struct lp55xx_device_config lp5521_cfg = { | |
481 | .reset = { | |
482 | .addr = LP5521_REG_RESET, | |
483 | .val = LP5521_RESET, | |
484 | }, | |
e3a700d8 MWK |
485 | .enable = { |
486 | .addr = LP5521_REG_ENABLE, | |
487 | .val = LP5521_ENABLE_DEFAULT, | |
488 | }, | |
0e202346 | 489 | .max_channel = LP5521_MAX_LEDS, |
ffbdccdb | 490 | .post_init_device = lp5521_post_init_device, |
a6e4679a | 491 | .brightness_work_fn = lp5521_led_brightness_work, |
a96bfa13 | 492 | .set_led_current = lp5521_set_led_current, |
9ce7cb17 MWK |
493 | .firmware_cb = lp5521_firmware_loaded, |
494 | .run_engine = lp5521_run_engine, | |
e73c0ce6 | 495 | .dev_attr_group = &lp5521_group, |
48068d5d MWK |
496 | }; |
497 | ||
98ea1ea2 | 498 | static int lp5521_probe(struct i2c_client *client, |
500fe141 SO |
499 | const struct i2c_device_id *id) |
500 | { | |
1904f83d | 501 | int ret; |
6a0c9a47 MWK |
502 | struct lp55xx_chip *chip; |
503 | struct lp55xx_led *led; | |
7542a04b LW |
504 | struct lp55xx_platform_data *pdata; |
505 | struct device_node *np = client->dev.of_node; | |
506 | ||
87aae1ea | 507 | if (!dev_get_platdata(&client->dev)) { |
7542a04b LW |
508 | if (np) { |
509 | ret = lp55xx_of_populate_pdata(&client->dev, np); | |
510 | if (ret < 0) | |
511 | return ret; | |
512 | } else { | |
513 | dev_err(&client->dev, "no platform data\n"); | |
514 | return -EINVAL; | |
515 | } | |
500fe141 | 516 | } |
87aae1ea | 517 | pdata = dev_get_platdata(&client->dev); |
500fe141 | 518 | |
6a0c9a47 MWK |
519 | chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL); |
520 | if (!chip) | |
521 | return -ENOMEM; | |
522 | ||
523 | led = devm_kzalloc(&client->dev, | |
524 | sizeof(*led) * pdata->num_channels, GFP_KERNEL); | |
525 | if (!led) | |
526 | return -ENOMEM; | |
527 | ||
528 | chip->cl = client; | |
529 | chip->pdata = pdata; | |
48068d5d | 530 | chip->cfg = &lp5521_cfg; |
6a0c9a47 MWK |
531 | |
532 | mutex_init(&chip->lock); | |
500fe141 | 533 | |
6a0c9a47 | 534 | i2c_set_clientdata(client, led); |
500fe141 | 535 | |
22ebeb48 | 536 | ret = lp55xx_init_device(chip); |
944f7b1d | 537 | if (ret) |
f6c64c6f | 538 | goto err_init; |
500fe141 SO |
539 | |
540 | dev_info(&client->dev, "%s programmable led chip found\n", id->name); | |
541 | ||
9e9b3db1 | 542 | ret = lp55xx_register_leds(led, chip); |
f6524808 | 543 | if (ret) |
9e9b3db1 | 544 | goto err_register_leds; |
500fe141 | 545 | |
e73c0ce6 | 546 | ret = lp55xx_register_sysfs(chip); |
500fe141 SO |
547 | if (ret) { |
548 | dev_err(&client->dev, "registering sysfs failed\n"); | |
e73c0ce6 | 549 | goto err_register_sysfs; |
500fe141 | 550 | } |
e73c0ce6 MWK |
551 | |
552 | return 0; | |
553 | ||
554 | err_register_sysfs: | |
c3a68ebf | 555 | lp55xx_unregister_leds(led, chip); |
9e9b3db1 | 556 | err_register_leds: |
6ce61762 | 557 | lp55xx_deinit_device(chip); |
f6c64c6f | 558 | err_init: |
500fe141 SO |
559 | return ret; |
560 | } | |
561 | ||
678e8a6b | 562 | static int lp5521_remove(struct i2c_client *client) |
500fe141 | 563 | { |
6ce61762 MWK |
564 | struct lp55xx_led *led = i2c_get_clientdata(client); |
565 | struct lp55xx_chip *chip = led->chip; | |
500fe141 | 566 | |
87cc4bde MWK |
567 | lp5521_stop_engine(chip); |
568 | lp55xx_unregister_sysfs(chip); | |
c3a68ebf | 569 | lp55xx_unregister_leds(led, chip); |
6ce61762 | 570 | lp55xx_deinit_device(chip); |
500fe141 | 571 | |
500fe141 SO |
572 | return 0; |
573 | } | |
574 | ||
575 | static const struct i2c_device_id lp5521_id[] = { | |
576 | { "lp5521", 0 }, /* Three channel chip */ | |
577 | { } | |
578 | }; | |
579 | MODULE_DEVICE_TABLE(i2c, lp5521_id); | |
580 | ||
b548a34b AL |
581 | #ifdef CONFIG_OF |
582 | static const struct of_device_id of_lp5521_leds_match[] = { | |
583 | { .compatible = "national,lp5521", }, | |
584 | {}, | |
585 | }; | |
586 | ||
587 | MODULE_DEVICE_TABLE(of, of_lp5521_leds_match); | |
588 | #endif | |
500fe141 SO |
589 | static struct i2c_driver lp5521_driver = { |
590 | .driver = { | |
591 | .name = "lp5521", | |
b548a34b | 592 | .of_match_table = of_match_ptr(of_lp5521_leds_match), |
500fe141 SO |
593 | }, |
594 | .probe = lp5521_probe, | |
df07cf81 | 595 | .remove = lp5521_remove, |
500fe141 SO |
596 | .id_table = lp5521_id, |
597 | }; | |
598 | ||
09a0d183 | 599 | module_i2c_driver(lp5521_driver); |
500fe141 SO |
600 | |
601 | MODULE_AUTHOR("Mathias Nyman, Yuri Zaporozhets, Samu Onkalo"); | |
a2387cb9 | 602 | MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>"); |
500fe141 SO |
603 | MODULE_DESCRIPTION("LP5521 LED engine"); |
604 | MODULE_LICENSE("GPL v2"); |