blob: 3979428f3100ab9d274a5e3bb3afa1333399efee [file] [log] [blame]
Samu Onkalo0efba162010-11-11 14:05:22 -08001/*
2 * lp5523.c - LP5523 LED Driver
3 *
4 * Copyright (C) 2010 Nokia Corporation
Milo(Woogyom) Kima2387cb2013-02-05 19:28:00 +09005 * Copyright (C) 2012 Texas Instruments
Samu Onkalo0efba162010-11-11 14:05:22 -08006 *
7 * Contact: Samu Onkalo <samu.p.onkalo@nokia.com>
Milo(Woogyom) Kima2387cb2013-02-05 19:28:00 +09008 * Milo(Woogyom) Kim <milo.kim@ti.com>
Samu Onkalo0efba162010-11-11 14:05:22 -08009 *
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
Samu Onkalo0efba162010-11-11 14:05:22 -080025#include <linux/delay.h>
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +090026#include <linux/firmware.h>
Milo(Woogyom) Kim79bcc102013-02-05 19:26:14 +090027#include <linux/i2c.h>
28#include <linux/init.h>
29#include <linux/leds.h>
30#include <linux/module.h>
31#include <linux/mutex.h>
32#include <linux/platform_data/leds-lp55xx.h>
33#include <linux/slab.h>
Milo(Woogyom) Kim6a0c9a42013-02-05 18:03:08 +090034
35#include "leds-lp55xx-common.h"
Samu Onkalo0efba162010-11-11 14:05:22 -080036
Milo(Woogyom) Kim12f022d2013-02-05 19:25:26 +090037#define LP5523_PROGRAM_LENGTH 32
38#define LP5523_MAX_LEDS 9
39
40/* Registers */
Samu Onkalo0efba162010-11-11 14:05:22 -080041#define LP5523_REG_ENABLE 0x00
42#define LP5523_REG_OP_MODE 0x01
Samu Onkalo0efba162010-11-11 14:05:22 -080043#define LP5523_REG_ENABLE_LEDS_MSB 0x04
44#define LP5523_REG_ENABLE_LEDS_LSB 0x05
Samu Onkalo0efba162010-11-11 14:05:22 -080045#define LP5523_REG_LED_PWM_BASE 0x16
46#define LP5523_REG_LED_CURRENT_BASE 0x26
47#define LP5523_REG_CONFIG 0x36
Milo(Woogyom) Kim12f022d2013-02-05 19:25:26 +090048#define LP5523_REG_STATUS 0x3A
49#define LP5523_REG_RESET 0x3D
Samu Onkalo0efba162010-11-11 14:05:22 -080050#define LP5523_REG_LED_TEST_CTRL 0x41
51#define LP5523_REG_LED_TEST_ADC 0x42
Milo(Woogyom) Kim12f022d2013-02-05 19:25:26 +090052#define LP5523_REG_PROG_PAGE_SEL 0x4F
Samu Onkalo0efba162010-11-11 14:05:22 -080053#define LP5523_REG_PROG_MEM 0x50
54
Milo(Woogyom) Kim12f022d2013-02-05 19:25:26 +090055/* Bit description in registers */
Samu Onkalo0efba162010-11-11 14:05:22 -080056#define LP5523_ENABLE 0x40
57#define LP5523_AUTO_INC 0x40
58#define LP5523_PWR_SAVE 0x20
59#define LP5523_PWM_PWR_SAVE 0x04
Samu Onkalo0efba162010-11-11 14:05:22 -080060#define LP5523_CP_AUTO 0x18
Samu Onkalo0efba162010-11-11 14:05:22 -080061#define LP5523_AUTO_CLK 0x02
Milo(Woogyom) Kim12f022d2013-02-05 19:25:26 +090062
Samu Onkalo0efba162010-11-11 14:05:22 -080063#define LP5523_EN_LEDTEST 0x80
64#define LP5523_LEDTEST_DONE 0x80
Milo(Woogyom) Kim48068d52013-02-05 18:08:49 +090065#define LP5523_RESET 0xFF
Samu Onkalo0efba162010-11-11 14:05:22 -080066#define LP5523_ADC_SHORTCIRC_LIM 80
Samu Onkalo0efba162010-11-11 14:05:22 -080067#define LP5523_EXT_CLK_USED 0x08
68
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +090069/* Memory Page Selection */
70#define LP5523_PAGE_ENG1 0
71#define LP5523_PAGE_ENG2 1
72#define LP5523_PAGE_ENG3 2
73
74/* Program Memory Operations */
75#define LP5523_MODE_ENG1_M 0x30 /* Operation Mode Register */
76#define LP5523_MODE_ENG2_M 0x0C
77#define LP5523_MODE_ENG3_M 0x03
78#define LP5523_LOAD_ENG1 0x10
79#define LP5523_LOAD_ENG2 0x04
80#define LP5523_LOAD_ENG3 0x01
81
82#define LP5523_ENG1_IS_LOADING(mode) \
83 ((mode & LP5523_MODE_ENG1_M) == LP5523_LOAD_ENG1)
84#define LP5523_ENG2_IS_LOADING(mode) \
85 ((mode & LP5523_MODE_ENG2_M) == LP5523_LOAD_ENG2)
86#define LP5523_ENG3_IS_LOADING(mode) \
87 ((mode & LP5523_MODE_ENG3_M) == LP5523_LOAD_ENG3)
88
89#define LP5523_EXEC_ENG1_M 0x30 /* Enable Register */
90#define LP5523_EXEC_ENG2_M 0x0C
91#define LP5523_EXEC_ENG3_M 0x03
92#define LP5523_EXEC_M 0x3F
93#define LP5523_RUN_ENG1 0x20
94#define LP5523_RUN_ENG2 0x08
95#define LP5523_RUN_ENG3 0x02
96
Kim, Milo27d77042012-09-04 15:06:18 +080097enum lp5523_chip_id {
98 LP5523,
99 LP55231,
100};
101
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900102static inline void lp5523_wait_opmode_done(void)
103{
104 usleep_range(1000, 2000);
105}
106
Milo(Woogyom) Kima96bfa12013-02-05 19:09:32 +0900107static void lp5523_set_led_current(struct lp55xx_led *led, u8 led_current)
108{
109 led->led_current = led_current;
110 lp55xx_write(led->chip, LP5523_REG_LED_CURRENT_BASE + led->chan_nr,
111 led_current);
112}
113
Milo(Woogyom) Kimffbdccd2013-02-05 18:57:36 +0900114static int lp5523_post_init_device(struct lp55xx_chip *chip)
Samu Onkalo0efba162010-11-11 14:05:22 -0800115{
Milo(Woogyom) Kimffbdccd2013-02-05 18:57:36 +0900116 int ret;
Samu Onkalo0efba162010-11-11 14:05:22 -0800117
Milo(Woogyom) Kimffbdccd2013-02-05 18:57:36 +0900118 ret = lp55xx_write(chip, LP5523_REG_ENABLE, LP5523_ENABLE);
Milo(Woogyom) Kim632418b2013-02-05 18:04:50 +0900119 if (ret)
120 return ret;
Samu Onkalo0efba162010-11-11 14:05:22 -0800121
Samu Onkalo2e4840e2010-11-24 12:57:04 -0800122 /* Chip startup time is 500 us, 1 - 2 ms gives some margin */
123 usleep_range(1000, 2000);
Samu Onkalo0efba162010-11-11 14:05:22 -0800124
Milo(Woogyom) Kimffbdccd2013-02-05 18:57:36 +0900125 ret = lp55xx_write(chip, LP5523_REG_CONFIG,
Samu Onkalo0efba162010-11-11 14:05:22 -0800126 LP5523_AUTO_INC | LP5523_PWR_SAVE |
127 LP5523_CP_AUTO | LP5523_AUTO_CLK |
128 LP5523_PWM_PWR_SAVE);
Milo(Woogyom) Kim632418b2013-02-05 18:04:50 +0900129 if (ret)
Jingoo Han1b21ec52012-10-28 18:45:11 -0700130 return ret;
131
Milo(Woogyom) Kim632418b2013-02-05 18:04:50 +0900132 /* turn on all leds */
Milo(Woogyom) Kimffbdccd2013-02-05 18:57:36 +0900133 ret = lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_MSB, 0x01);
Milo(Woogyom) Kim632418b2013-02-05 18:04:50 +0900134 if (ret)
135 return ret;
Samu Onkalo0efba162010-11-11 14:05:22 -0800136
Milo(Woogyom) Kimffbdccd2013-02-05 18:57:36 +0900137 return lp55xx_write(chip, LP5523_REG_ENABLE_LEDS_LSB, 0xff);
Samu Onkalo0efba162010-11-11 14:05:22 -0800138}
139
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900140static void lp5523_load_engine(struct lp55xx_chip *chip)
Samu Onkalo0efba162010-11-11 14:05:22 -0800141{
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900142 enum lp55xx_engine_index idx = chip->engine_idx;
143 u8 mask[] = {
144 [LP55XX_ENGINE_1] = LP5523_MODE_ENG1_M,
145 [LP55XX_ENGINE_2] = LP5523_MODE_ENG2_M,
146 [LP55XX_ENGINE_3] = LP5523_MODE_ENG3_M,
147 };
Samu Onkalo0efba162010-11-11 14:05:22 -0800148
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900149 u8 val[] = {
150 [LP55XX_ENGINE_1] = LP5523_LOAD_ENG1,
151 [LP55XX_ENGINE_2] = LP5523_LOAD_ENG2,
152 [LP55XX_ENGINE_3] = LP5523_LOAD_ENG3,
153 };
Samu Onkalo0efba162010-11-11 14:05:22 -0800154
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900155 u8 page_sel[] = {
156 [LP55XX_ENGINE_1] = LP5523_PAGE_ENG1,
157 [LP55XX_ENGINE_2] = LP5523_PAGE_ENG2,
158 [LP55XX_ENGINE_3] = LP5523_PAGE_ENG3,
159 };
Samu Onkalo0efba162010-11-11 14:05:22 -0800160
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900161 lp55xx_update_bits(chip, LP5523_REG_OP_MODE, mask[idx], val[idx]);
Samu Onkalo0efba162010-11-11 14:05:22 -0800162
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900163 lp5523_wait_opmode_done();
Samu Onkalo0efba162010-11-11 14:05:22 -0800164
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900165 lp55xx_write(chip, LP5523_REG_PROG_PAGE_SEL, page_sel[idx]);
Samu Onkalo0efba162010-11-11 14:05:22 -0800166}
167
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900168static void lp5523_stop_engine(struct lp55xx_chip *chip)
Samu Onkalo0efba162010-11-11 14:05:22 -0800169{
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900170 lp55xx_write(chip, LP5523_REG_OP_MODE, 0);
171 lp5523_wait_opmode_done();
Samu Onkalo0efba162010-11-11 14:05:22 -0800172}
173
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900174static void lp5523_turn_off_channels(struct lp55xx_chip *chip)
Samu Onkalo0efba162010-11-11 14:05:22 -0800175{
176 int i;
Kim, Milo469eba02012-08-21 17:04:02 +0800177
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900178 for (i = 0; i < LP5523_MAX_LEDS; i++)
179 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0);
180}
181
182static void lp5523_run_engine(struct lp55xx_chip *chip, bool start)
183{
184 int ret;
185 u8 mode;
186 u8 exec;
187
188 /* stop engine */
189 if (!start) {
190 lp5523_stop_engine(chip);
191 lp5523_turn_off_channels(chip);
192 return;
Samu Onkalo0efba162010-11-11 14:05:22 -0800193 }
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900194
195 /*
196 * To run the engine,
197 * operation mode and enable register should updated at the same time
198 */
199
200 ret = lp55xx_read(chip, LP5523_REG_OP_MODE, &mode);
201 if (ret)
202 return;
203
204 ret = lp55xx_read(chip, LP5523_REG_ENABLE, &exec);
205 if (ret)
206 return;
207
208 /* change operation mode to RUN only when each engine is loading */
209 if (LP5523_ENG1_IS_LOADING(mode)) {
210 mode = (mode & ~LP5523_MODE_ENG1_M) | LP5523_RUN_ENG1;
211 exec = (exec & ~LP5523_EXEC_ENG1_M) | LP5523_RUN_ENG1;
212 }
213
214 if (LP5523_ENG2_IS_LOADING(mode)) {
215 mode = (mode & ~LP5523_MODE_ENG2_M) | LP5523_RUN_ENG2;
216 exec = (exec & ~LP5523_EXEC_ENG2_M) | LP5523_RUN_ENG2;
217 }
218
219 if (LP5523_ENG3_IS_LOADING(mode)) {
220 mode = (mode & ~LP5523_MODE_ENG3_M) | LP5523_RUN_ENG3;
221 exec = (exec & ~LP5523_EXEC_ENG3_M) | LP5523_RUN_ENG3;
222 }
223
224 lp55xx_write(chip, LP5523_REG_OP_MODE, mode);
225 lp5523_wait_opmode_done();
226
227 lp55xx_update_bits(chip, LP5523_REG_ENABLE, LP5523_EXEC_M, exec);
228}
229
230static int lp5523_update_program_memory(struct lp55xx_chip *chip,
231 const u8 *data, size_t size)
232{
233 u8 pattern[LP5523_PROGRAM_LENGTH] = {0};
234 unsigned cmd;
235 char c[3];
236 int update_size;
237 int nrchars;
238 int offset = 0;
239 int ret;
240 int i;
241
242 /* clear program memory before updating */
243 for (i = 0; i < LP5523_PROGRAM_LENGTH; i++)
244 lp55xx_write(chip, LP5523_REG_PROG_MEM + i, 0);
245
246 i = 0;
247 while ((offset < size - 1) && (i < LP5523_PROGRAM_LENGTH)) {
248 /* separate sscanfs because length is working only for %s */
249 ret = sscanf(data + offset, "%2s%n ", c, &nrchars);
250 if (ret != 1)
251 goto err;
252
253 ret = sscanf(c, "%2x", &cmd);
254 if (ret != 1)
255 goto err;
256
257 pattern[i] = (u8)cmd;
258 offset += nrchars;
259 i++;
260 }
261
262 /* Each instruction is 16bit long. Check that length is even */
263 if (i % 2)
264 goto err;
265
266 update_size = i;
267 for (i = 0; i < update_size; i++)
268 lp55xx_write(chip, LP5523_REG_PROG_MEM + i, pattern[i]);
Samu Onkalo0efba162010-11-11 14:05:22 -0800269
270 return 0;
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900271
272err:
273 dev_err(&chip->cl->dev, "wrong pattern format\n");
274 return -EINVAL;
Samu Onkalo0efba162010-11-11 14:05:22 -0800275}
276
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900277static void lp5523_firmware_loaded(struct lp55xx_chip *chip)
Samu Onkalo0efba162010-11-11 14:05:22 -0800278{
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900279 const struct firmware *fw = chip->fw;
Samu Onkalo0efba162010-11-11 14:05:22 -0800280
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900281 if (fw->size > LP5523_PROGRAM_LENGTH) {
282 dev_err(&chip->cl->dev, "firmware data size overflow: %zu\n",
283 fw->size);
284 return;
285 }
286
287 /*
288 * Program momery sequence
289 * 1) set engine mode to "LOAD"
290 * 2) write firmware data into program memory
291 */
292
293 lp5523_load_engine(chip);
294 lp5523_update_program_memory(chip, fw->data, fw->size);
Samu Onkalo0efba162010-11-11 14:05:22 -0800295}
296
Samu Onkalo0efba162010-11-11 14:05:22 -0800297static ssize_t lp5523_selftest(struct device *dev,
298 struct device_attribute *attr,
299 char *buf)
300{
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900301 struct lp55xx_led *led = i2c_get_clientdata(to_i2c_client(dev));
302 struct lp55xx_chip *chip = led->chip;
303 struct lp55xx_platform_data *pdata = chip->pdata;
Samu Onkalo0efba162010-11-11 14:05:22 -0800304 int i, ret, pos = 0;
Samu Onkalo0efba162010-11-11 14:05:22 -0800305 u8 status, adc, vdd;
306
307 mutex_lock(&chip->lock);
308
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900309 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
Samu Onkalo0efba162010-11-11 14:05:22 -0800310 if (ret < 0)
311 goto fail;
312
313 /* Check that ext clock is really in use if requested */
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900314 if (pdata->clock_mode == LP55XX_CLOCK_EXT) {
Samu Onkalo0efba162010-11-11 14:05:22 -0800315 if ((status & LP5523_EXT_CLK_USED) == 0)
316 goto fail;
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900317 }
Samu Onkalo0efba162010-11-11 14:05:22 -0800318
319 /* Measure VDD (i.e. VBAT) first (channel 16 corresponds to VDD) */
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900320 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL, LP5523_EN_LEDTEST | 16);
Samu Onkalo2e4840e2010-11-24 12:57:04 -0800321 usleep_range(3000, 6000); /* ADC conversion time is typically 2.7 ms */
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900322 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
Jingoo Han1b21ec52012-10-28 18:45:11 -0700323 if (ret < 0)
324 goto fail;
325
Samu Onkalo0efba162010-11-11 14:05:22 -0800326 if (!(status & LP5523_LEDTEST_DONE))
Samu Onkalo2e4840e2010-11-24 12:57:04 -0800327 usleep_range(3000, 6000); /* Was not ready. Wait little bit */
Samu Onkalo0efba162010-11-11 14:05:22 -0800328
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900329 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &vdd);
Jingoo Han1b21ec52012-10-28 18:45:11 -0700330 if (ret < 0)
331 goto fail;
332
Samu Onkalo0efba162010-11-11 14:05:22 -0800333 vdd--; /* There may be some fluctuation in measurement */
334
Milo(Woogyom) Kim0e202342013-02-05 19:07:34 +0900335 for (i = 0; i < LP5523_MAX_LEDS; i++) {
Samu Onkalo0efba162010-11-11 14:05:22 -0800336 /* Skip non-existing channels */
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900337 if (pdata->led_config[i].led_current == 0)
Samu Onkalo0efba162010-11-11 14:05:22 -0800338 continue;
339
340 /* Set default current */
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900341 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
342 pdata->led_config[i].led_current);
Samu Onkalo0efba162010-11-11 14:05:22 -0800343
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900344 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0xff);
Samu Onkalo2e4840e2010-11-24 12:57:04 -0800345 /* let current stabilize 2 - 4ms before measurements start */
346 usleep_range(2000, 4000);
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900347 lp55xx_write(chip, LP5523_REG_LED_TEST_CTRL,
Samu Onkalo0efba162010-11-11 14:05:22 -0800348 LP5523_EN_LEDTEST | i);
Samu Onkalo2e4840e2010-11-24 12:57:04 -0800349 /* ADC conversion time is 2.7 ms typically */
350 usleep_range(3000, 6000);
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900351 ret = lp55xx_read(chip, LP5523_REG_STATUS, &status);
Jingoo Han1b21ec52012-10-28 18:45:11 -0700352 if (ret < 0)
353 goto fail;
354
Samu Onkalo0efba162010-11-11 14:05:22 -0800355 if (!(status & LP5523_LEDTEST_DONE))
Samu Onkalo2e4840e2010-11-24 12:57:04 -0800356 usleep_range(3000, 6000);/* Was not ready. Wait. */
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900357
358 ret = lp55xx_read(chip, LP5523_REG_LED_TEST_ADC, &adc);
Jingoo Han1b21ec52012-10-28 18:45:11 -0700359 if (ret < 0)
360 goto fail;
Samu Onkalo0efba162010-11-11 14:05:22 -0800361
362 if (adc >= vdd || adc < LP5523_ADC_SHORTCIRC_LIM)
363 pos += sprintf(buf + pos, "LED %d FAIL\n", i);
364
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900365 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + i, 0x00);
Samu Onkalo0efba162010-11-11 14:05:22 -0800366
367 /* Restore current */
Milo(Woogyom) Kim9ca3bd82013-02-05 19:21:43 +0900368 lp55xx_write(chip, LP5523_REG_LED_CURRENT_BASE + i,
369 led->led_current);
Samu Onkalo0efba162010-11-11 14:05:22 -0800370 led++;
371 }
372 if (pos == 0)
373 pos = sprintf(buf, "OK\n");
374 goto release_lock;
375fail:
376 pos = sprintf(buf, "FAIL\n");
377
378release_lock:
379 mutex_unlock(&chip->lock);
380
381 return pos;
382}
383
Samu Onkalo0efba162010-11-11 14:05:22 -0800384static void lp5523_led_brightness_work(struct work_struct *work)
385{
Milo(Woogyom) Kima6e46792013-02-05 19:08:40 +0900386 struct lp55xx_led *led = container_of(work, struct lp55xx_led,
Samu Onkalo0efba162010-11-11 14:05:22 -0800387 brightness_work);
Milo(Woogyom) Kima6e46792013-02-05 19:08:40 +0900388 struct lp55xx_chip *chip = led->chip;
Samu Onkalo0efba162010-11-11 14:05:22 -0800389
390 mutex_lock(&chip->lock);
Milo(Woogyom) Kima6e46792013-02-05 19:08:40 +0900391 lp55xx_write(chip, LP5523_REG_LED_PWM_BASE + led->chan_nr,
Samu Onkalo0efba162010-11-11 14:05:22 -0800392 led->brightness);
Samu Onkalo0efba162010-11-11 14:05:22 -0800393 mutex_unlock(&chip->lock);
394}
395
Samu Onkalo0efba162010-11-11 14:05:22 -0800396static DEVICE_ATTR(selftest, S_IRUGO, lp5523_selftest, NULL);
397
398static struct attribute *lp5523_attributes[] = {
Samu Onkalo0efba162010-11-11 14:05:22 -0800399 &dev_attr_selftest.attr,
Kim, Milof1625842012-09-12 20:16:03 +0800400 NULL,
Samu Onkalo0efba162010-11-11 14:05:22 -0800401};
402
403static const struct attribute_group lp5523_group = {
404 .attrs = lp5523_attributes,
405};
406
Milo(Woogyom) Kim48068d52013-02-05 18:08:49 +0900407/* Chip specific configurations */
408static struct lp55xx_device_config lp5523_cfg = {
409 .reset = {
410 .addr = LP5523_REG_RESET,
411 .val = LP5523_RESET,
412 },
Milo(Woogyom) Kime3a700d2013-02-05 18:09:56 +0900413 .enable = {
414 .addr = LP5523_REG_ENABLE,
415 .val = LP5523_ENABLE,
416 },
Milo(Woogyom) Kim0e202342013-02-05 19:07:34 +0900417 .max_channel = LP5523_MAX_LEDS,
Milo(Woogyom) Kimffbdccd2013-02-05 18:57:36 +0900418 .post_init_device = lp5523_post_init_device,
Milo(Woogyom) Kima6e46792013-02-05 19:08:40 +0900419 .brightness_work_fn = lp5523_led_brightness_work,
Milo(Woogyom) Kima96bfa12013-02-05 19:09:32 +0900420 .set_led_current = lp5523_set_led_current,
Milo(Woogyom) Kimdb6eaf82013-02-05 19:18:51 +0900421 .firmware_cb = lp5523_firmware_loaded,
422 .run_engine = lp5523_run_engine,
Milo(Woogyom) Kime73c0ce2013-02-05 19:20:45 +0900423 .dev_attr_group = &lp5523_group,
Milo(Woogyom) Kim48068d52013-02-05 18:08:49 +0900424};
425
Bill Pemberton98ea1ea2012-11-19 13:23:02 -0500426static int lp5523_probe(struct i2c_client *client,
Samu Onkalo0efba162010-11-11 14:05:22 -0800427 const struct i2c_device_id *id)
428{
Milo(Woogyom) Kim22ebeb42013-02-05 18:58:35 +0900429 int ret;
Milo(Woogyom) Kim6a0c9a42013-02-05 18:03:08 +0900430 struct lp55xx_chip *chip;
431 struct lp55xx_led *led;
Linus Walleij7542a04b2013-04-23 04:52:59 -0700432 struct lp55xx_platform_data *pdata;
433 struct device_node *np = client->dev.of_node;
Samu Onkalo0efba162010-11-11 14:05:22 -0800434
Linus Walleij7542a04b2013-04-23 04:52:59 -0700435 if (!client->dev.platform_data) {
436 if (np) {
437 ret = lp55xx_of_populate_pdata(&client->dev, np);
438 if (ret < 0)
439 return ret;
440 } else {
441 dev_err(&client->dev, "no platform data\n");
442 return -EINVAL;
443 }
Samu Onkalo0efba162010-11-11 14:05:22 -0800444 }
Linus Walleij7542a04b2013-04-23 04:52:59 -0700445 pdata = client->dev.platform_data;
Samu Onkalo0efba162010-11-11 14:05:22 -0800446
Milo(Woogyom) Kim6a0c9a42013-02-05 18:03:08 +0900447 chip = devm_kzalloc(&client->dev, sizeof(*chip), GFP_KERNEL);
448 if (!chip)
449 return -ENOMEM;
Samu Onkalo0efba162010-11-11 14:05:22 -0800450
Milo(Woogyom) Kim6a0c9a42013-02-05 18:03:08 +0900451 led = devm_kzalloc(&client->dev,
452 sizeof(*led) * pdata->num_channels, GFP_KERNEL);
453 if (!led)
454 return -ENOMEM;
455
456 chip->cl = client;
457 chip->pdata = pdata;
Milo(Woogyom) Kim48068d52013-02-05 18:08:49 +0900458 chip->cfg = &lp5523_cfg;
Milo(Woogyom) Kim6a0c9a42013-02-05 18:03:08 +0900459
460 mutex_init(&chip->lock);
461
462 i2c_set_clientdata(client, led);
Samu Onkalo0efba162010-11-11 14:05:22 -0800463
Milo(Woogyom) Kim22ebeb42013-02-05 18:58:35 +0900464 ret = lp55xx_init_device(chip);
Samu Onkalo0efba162010-11-11 14:05:22 -0800465 if (ret)
Milo(Woogyom) Kimf6c64c62013-02-05 17:58:01 +0900466 goto err_init;
Samu Onkalo0efba162010-11-11 14:05:22 -0800467
Kim, Milo56a1e9a2012-09-04 15:06:26 +0800468 dev_info(&client->dev, "%s Programmable led chip found\n", id->name);
Samu Onkalo0efba162010-11-11 14:05:22 -0800469
Milo(Woogyom) Kim9e9b3db2013-02-05 19:06:27 +0900470 ret = lp55xx_register_leds(led, chip);
Milo(Woogyom) Kimf6524802013-02-05 17:53:40 +0900471 if (ret)
Milo(Woogyom) Kim9e9b3db2013-02-05 19:06:27 +0900472 goto err_register_leds;
Samu Onkalo0efba162010-11-11 14:05:22 -0800473
Milo(Woogyom) Kime73c0ce2013-02-05 19:20:45 +0900474 ret = lp55xx_register_sysfs(chip);
Samu Onkalo0efba162010-11-11 14:05:22 -0800475 if (ret) {
476 dev_err(&client->dev, "registering sysfs failed\n");
Milo(Woogyom) Kime73c0ce2013-02-05 19:20:45 +0900477 goto err_register_sysfs;
Samu Onkalo0efba162010-11-11 14:05:22 -0800478 }
Milo(Woogyom) Kime73c0ce2013-02-05 19:20:45 +0900479
480 return 0;
481
482err_register_sysfs:
Milo(Woogyom) Kimc3a68eb2013-02-05 19:11:18 +0900483 lp55xx_unregister_leds(led, chip);
Milo(Woogyom) Kim9e9b3db2013-02-05 19:06:27 +0900484err_register_leds:
Milo(Woogyom) Kim6ce61762013-02-05 19:03:02 +0900485 lp55xx_deinit_device(chip);
Milo(Woogyom) Kimf6c64c62013-02-05 17:58:01 +0900486err_init:
Samu Onkalo0efba162010-11-11 14:05:22 -0800487 return ret;
488}
489
490static int lp5523_remove(struct i2c_client *client)
491{
Milo(Woogyom) Kim6ce61762013-02-05 19:03:02 +0900492 struct lp55xx_led *led = i2c_get_clientdata(client);
493 struct lp55xx_chip *chip = led->chip;
Samu Onkalo0efba162010-11-11 14:05:22 -0800494
Milo(Woogyom) Kim87cc4bd2013-02-05 19:23:51 +0900495 lp5523_stop_engine(chip);
496 lp55xx_unregister_sysfs(chip);
Milo(Woogyom) Kimc3a68eb2013-02-05 19:11:18 +0900497 lp55xx_unregister_leds(led, chip);
Milo(Woogyom) Kim6ce61762013-02-05 19:03:02 +0900498 lp55xx_deinit_device(chip);
Samu Onkalo0efba162010-11-11 14:05:22 -0800499
Samu Onkalo0efba162010-11-11 14:05:22 -0800500 return 0;
501}
502
503static const struct i2c_device_id lp5523_id[] = {
Kim, Milo27d77042012-09-04 15:06:18 +0800504 { "lp5523", LP5523 },
505 { "lp55231", LP55231 },
Samu Onkalo0efba162010-11-11 14:05:22 -0800506 { }
507};
508
509MODULE_DEVICE_TABLE(i2c, lp5523_id);
510
Axel Lin33c88b62013-05-08 21:48:57 -0700511#ifdef CONFIG_OF
512static const struct of_device_id of_lp5523_leds_match[] = {
513 { .compatible = "national,lp5523", },
514 {},
515};
516
517MODULE_DEVICE_TABLE(of, of_lp5523_leds_match);
518#endif
519
Samu Onkalo0efba162010-11-11 14:05:22 -0800520static struct i2c_driver lp5523_driver = {
521 .driver = {
Kim, Milo27d77042012-09-04 15:06:18 +0800522 .name = "lp5523x",
Axel Lin33c88b62013-05-08 21:48:57 -0700523 .of_match_table = of_match_ptr(of_lp5523_leds_match),
Samu Onkalo0efba162010-11-11 14:05:22 -0800524 },
525 .probe = lp5523_probe,
526 .remove = lp5523_remove,
527 .id_table = lp5523_id,
528};
529
Axel Lin09a0d182012-01-10 15:09:27 -0800530module_i2c_driver(lp5523_driver);
Samu Onkalo0efba162010-11-11 14:05:22 -0800531
532MODULE_AUTHOR("Mathias Nyman <mathias.nyman@nokia.com>");
Milo(Woogyom) Kima2387cb2013-02-05 19:28:00 +0900533MODULE_AUTHOR("Milo Kim <milo.kim@ti.com>");
Samu Onkalo0efba162010-11-11 14:05:22 -0800534MODULE_DESCRIPTION("LP5523 LED engine");
535MODULE_LICENSE("GPL");