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authorG.Shark Jeong <gshark.jeong@gmail.com>2012-06-21 20:12:06 -0400
committerBryan Wu <bryan.wu@canonical.com>2012-07-23 19:52:35 -0400
commit32abb4788d3fff69fa242c7850e39ec1418df4f4 (patch)
tree26441f5ebda1a77b7f0f72fb6b487634b2e623c0
parent1522d02e275332080ec27e268edc29c79c6f5e0c (diff)
leds: Add LED driver for lm3556 chip
LM3556 : The LM3556 is a 4 MHz fixed-frequency synchronous boost converter plus 1.5A constant current driver for a high-current white LED. Datasheet: www.national.com/ds/LM/LM3556.pdf Tested on OMAP4430 (bryan.wu@canonical.com: use module_i2c_driver() rather than lm3556_init/lm3556_exit for code simplicity; fixed some typo pointed out by Rob Landley) Signed-off-by: G.Shark Jeong <gshark.jeong@gmail.com> Reviewed-by: Axel Lin <axel.lin@gmail.com> Reviewed-by: Kim, Milo <Milo.Kim@ti.com> Acked-by: Rob Landley <rob@landley.net> Signed-off-by: Bryan Wu <bryan.wu@canonical.com>
Diffstat
-rw-r--r--Documentation/leds/00-INDEX2
-rw-r--r--Documentation/leds/leds-lm3556.txt85
-rw-r--r--drivers/leds/Kconfig8
-rw-r--r--drivers/leds/Makefile1
-rw-r--r--drivers/leds/leds-lm3556.c512
-rw-r--r--include/linux/platform_data/leds-lm3556.h50
6 files changed, 658 insertions, 0 deletions
diff --git a/Documentation/leds/00-INDEX b/Documentation/leds/00-INDEX
index 29f481df32c..5fefe374892 100644
--- a/Documentation/leds/00-INDEX
+++ b/Documentation/leds/00-INDEX
@@ -6,3 +6,5 @@ leds-lp5521.txt
6 - notes on how to use the leds-lp5521 driver. 6 - notes on how to use the leds-lp5521 driver.
7leds-lp5523.txt 7leds-lp5523.txt
8 - notes on how to use the leds-lp5523 driver. 8 - notes on how to use the leds-lp5523 driver.
9leds-lm3556.txt
10 - notes on how to use the leds-lm3556 driver.
diff --git a/Documentation/leds/leds-lm3556.txt b/Documentation/leds/leds-lm3556.txt
new file mode 100644
index 00000000000..d9eb91b5191
--- /dev/null
+++ b/Documentation/leds/leds-lm3556.txt
@@ -0,0 +1,85 @@
1Kernel driver for lm3556
2========================
3
4*Texas Instrument:
5 1.5 A Synchronous Boost LED Flash Driver w/ High-Side Current Source
6* Datasheet: http://www.national.com/ds/LM/LM3556.pdf
7
8Authors:
9 Daniel Jeong
10 Contact:Daniel Jeong(daniel.jeong-at-ti.com, gshark.jeong-at-gmail.com)
11
12Description
13-----------
14There are 3 functions in LM3556, Flash, Torch and Indicator.
15
16FLASH MODE
17In Flash Mode, the LED current source(LED) provides 16 target current levels
18from 93.75 mA to 1500 mA.The Flash currents are adjusted via the CURRENT
19CONTROL REGISTER(0x09).Flash mode is activated by the ENABLE REGISTER(0x0A),
20or by pulling the STROBE pin HIGH.
21LM3556 Flash can be controlled through sys/class/leds/flash/brightness file
22* if STROBE pin is enabled, below example control brightness only, and
23ON / OFF will be controlled by STROBE pin.
24
25Flash Example:
26OFF : #echo 0 > sys/class/leds/flash/brightness
2793.75 mA: #echo 1 > sys/class/leds/flash/brightness
28... .....
291500 mA: #echo 16 > sys/class/leds/flash/brightness
30
31TORCH MODE
32In Torch Mode, the current source(LED) is programmed via the CURRENT CONTROL
33REGISTER(0x09).Torch Mode is activated by the ENABLE REGISTER(0x0A) or by the
34hardware TORCH input.
35LM3556 torch can be controlled through sys/class/leds/torch/brightness file.
36* if TORCH pin is enabled, below example control brightness only,
37and ON / OFF will be controlled by TORCH pin.
38
39Torch Example:
40OFF : #echo 0 > sys/class/leds/torch/brightness
4146.88 mA: #echo 1 > sys/class/leds/torch/brightness
42... .....
43375 mA : #echo 8 > sys/class/leds/torch/brightness
44
45INDICATOR MODE
46Indicator pattern can be set through sys/class/leds/indicator/pattern file,
47and 4 patterns are pre-defined in indicator_pattern array.
48According to N-lank, Pulse time and N Period values, different pattern wiill
49be generated.If you want new patterns for your own device, change
50indicator_pattern array with your own values and INDIC_PATTERN_SIZE.
51Please refer datasheet for more detail about N-Blank, Pulse time and N Period.
52
53Indicator pattern example:
54pattern 0: #echo 0 > sys/class/leds/indicator/pattern
55....
56pattern 3: #echo 3 > sys/class/leds/indicator/pattern
57
58Indicator brightness can be controlled through
59sys/class/leds/indicator/brightness file.
60
61Example:
62OFF : #echo 0 > sys/class/leds/indicator/brightness
635.86 mA : #echo 1 > sys/class/leds/indicator/brightness
64........
6546.875mA : #echo 8 > sys/class/leds/indicator/brightness
66
67Notes
68-----
69Driver expects it is registered using the i2c_board_info mechanism.
70To register the chip at address 0x63 on specific adapter, set the platform data
71according to include/linux/platform_data/leds-lm3556.h, set the i2c board info
72
73Example:
74 static struct i2c_board_info __initdata board_i2c_ch4[] = {
75 {
76 I2C_BOARD_INFO(LM3556_NAME, 0x63),
77 .platform_data = &lm3556_pdata,
78 },
79 };
80
81and register it in the platform init function
82
83Example:
84 board_register_i2c_bus(4, 400,
85 board_i2c_ch4, ARRAY_SIZE(board_i2c_ch4));
diff --git a/drivers/leds/Kconfig b/drivers/leds/Kconfig
index 52f1d456f3d..f028f0348e8 100644
--- a/drivers/leds/Kconfig
+++ b/drivers/leds/Kconfig
@@ -415,6 +415,14 @@ config LEDS_MAX8997
415 This option enables support for on-chip LED drivers on 415 This option enables support for on-chip LED drivers on
416 MAXIM MAX8997 PMIC. 416 MAXIM MAX8997 PMIC.
417 417
418config LEDS_LM3556
419 tristate "LED support for LM3556 Chip"
420 depends on LEDS_CLASS && I2C
421 select REGMAP_I2C
422 help
423 This option enables support for LEDs connected to LM3556.
424 LM3556 includes Torch, Flash and Indicator functions.
425
418config LEDS_OT200 426config LEDS_OT200
419 tristate "LED support for the Bachmann OT200" 427 tristate "LED support for the Bachmann OT200"
420 depends on LEDS_CLASS && HAS_IOMEM 428 depends on LEDS_CLASS && HAS_IOMEM
diff --git a/drivers/leds/Makefile b/drivers/leds/Makefile
index 9112d518f9d..5eebd7bce4b 100644
--- a/drivers/leds/Makefile
+++ b/drivers/leds/Makefile
@@ -47,6 +47,7 @@ obj-$(CONFIG_LEDS_NETXBIG) += leds-netxbig.o
47obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o 47obj-$(CONFIG_LEDS_ASIC3) += leds-asic3.o
48obj-$(CONFIG_LEDS_RENESAS_TPU) += leds-renesas-tpu.o 48obj-$(CONFIG_LEDS_RENESAS_TPU) += leds-renesas-tpu.o
49obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o 49obj-$(CONFIG_LEDS_MAX8997) += leds-max8997.o
50obj-$(CONFIG_LEDS_LM3556) += leds-lm3556.o
50 51
51# LED SPI Drivers 52# LED SPI Drivers
52obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o 53obj-$(CONFIG_LEDS_DAC124S085) += leds-dac124s085.o
diff --git a/drivers/leds/leds-lm3556.c b/drivers/leds/leds-lm3556.c
new file mode 100644
index 00000000000..3062abd9a53
--- /dev/null
+++ b/drivers/leds/leds-lm3556.c
@@ -0,0 +1,512 @@
1/*
2 * Simple driver for Texas Instruments LM3556 LED Flash driver chip (Rev0x03)
3 * Copyright (C) 2012 Texas Instruments
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 * Please refer Documentation/leds/leds-lm3556.txt file.
10 */
11#include <linux/module.h>
12#include <linux/delay.h>
13#include <linux/i2c.h>
14#include <linux/leds.h>
15#include <linux/slab.h>
16#include <linux/platform_device.h>
17#include <linux/fs.h>
18#include <linux/regmap.h>
19#include <linux/platform_data/leds-lm3556.h>
20
21#define REG_FILT_TIME (0x0)
22#define REG_IVFM_MODE (0x1)
23#define REG_NTC (0x2)
24#define REG_INDIC_TIME (0x3)
25#define REG_INDIC_BLINK (0x4)
26#define REG_INDIC_PERIOD (0x5)
27#define REG_TORCH_TIME (0x6)
28#define REG_CONF (0x7)
29#define REG_FLASH (0x8)
30#define REG_I_CTRL (0x9)
31#define REG_ENABLE (0xA)
32#define REG_FLAG (0xB)
33#define REG_MAX (0xB)
34
35#define IVFM_FILTER_TIME_SHIFT (3)
36#define UVLO_EN_SHIFT (7)
37#define HYSTERSIS_SHIFT (5)
38#define IVM_D_TH_SHIFT (2)
39#define IVFM_ADJ_MODE_SHIFT (0)
40#define NTC_EVENT_LVL_SHIFT (5)
41#define NTC_TRIP_TH_SHIFT (2)
42#define NTC_BIAS_I_LVL_SHIFT (0)
43#define INDIC_RAMP_UP_TIME_SHIFT (3)
44#define INDIC_RAMP_DN_TIME_SHIFT (0)
45#define INDIC_N_BLANK_SHIFT (4)
46#define INDIC_PULSE_TIME_SHIFT (0)
47#define INDIC_N_PERIOD_SHIFT (0)
48#define TORCH_RAMP_UP_TIME_SHIFT (3)
49#define TORCH_RAMP_DN_TIME_SHIFT (0)
50#define STROBE_USUAGE_SHIFT (7)
51#define STROBE_PIN_POLARITY_SHIFT (6)
52#define TORCH_PIN_POLARITY_SHIFT (5)
53#define TX_PIN_POLARITY_SHIFT (4)
54#define TX_EVENT_LVL_SHIFT (3)
55#define IVFM_EN_SHIFT (2)
56#define NTC_MODE_SHIFT (1)
57#define INDIC_MODE_SHIFT (0)
58#define INDUCTOR_I_LIMIT_SHIFT (6)
59#define FLASH_RAMP_TIME_SHIFT (3)
60#define FLASH_TOUT_TIME_SHIFT (0)
61#define TORCH_I_SHIFT (4)
62#define FLASH_I_SHIFT (0)
63#define NTC_EN_SHIFT (7)
64#define TX_PIN_EN_SHIFT (6)
65#define STROBE_PIN_EN_SHIFT (5)
66#define TORCH_PIN_EN_SHIFT (4)
67#define PRECHG_MODE_EN_SHIFT (3)
68#define PASS_MODE_ONLY_EN_SHIFT (2)
69#define MODE_BITS_SHIFT (0)
70
71#define IVFM_FILTER_TIME_MASK (0x3)
72#define UVLO_EN_MASK (0x1)
73#define HYSTERSIS_MASK (0x3)
74#define IVM_D_TH_MASK (0x7)
75#define IVFM_ADJ_MODE_MASK (0x3)
76#define NTC_EVENT_LVL_MASK (0x1)
77#define NTC_TRIP_TH_MASK (0x7)
78#define NTC_BIAS_I_LVL_MASK (0x3)
79#define INDIC_RAMP_UP_TIME_MASK (0x7)
80#define INDIC_RAMP_DN_TIME_MASK (0x7)
81#define INDIC_N_BLANK_MASK (0x7)
82#define INDIC_PULSE_TIME_MASK (0x7)
83#define INDIC_N_PERIOD_MASK (0x7)
84#define TORCH_RAMP_UP_TIME_MASK (0x7)
85#define TORCH_RAMP_DN_TIME_MASK (0x7)
86#define STROBE_USUAGE_MASK (0x1)
87#define STROBE_PIN_POLARITY_MASK (0x1)
88#define TORCH_PIN_POLARITY_MASK (0x1)
89#define TX_PIN_POLARITY_MASK (0x1)
90#define TX_EVENT_LVL_MASK (0x1)
91#define IVFM_EN_MASK (0x1)
92#define NTC_MODE_MASK (0x1)
93#define INDIC_MODE_MASK (0x1)
94#define INDUCTOR_I_LIMIT_MASK (0x3)
95#define FLASH_RAMP_TIME_MASK (0x7)
96#define FLASH_TOUT_TIME_MASK (0x7)
97#define TORCH_I_MASK (0x7)
98#define FLASH_I_MASK (0xF)
99#define NTC_EN_MASK (0x1)
100#define TX_PIN_EN_MASK (0x1)
101#define STROBE_PIN_EN_MASK (0x1)
102#define TORCH_PIN_EN_MASK (0x1)
103#define PRECHG_MODE_EN_MASK (0x1)
104#define PASS_MODE_ONLY_EN_MASK (0x1)
105#define MODE_BITS_MASK (0x13)
106#define EX_PIN_CONTROL_MASK (0xF1)
107#define EX_PIN_ENABLE_MASK (0x70)
108
109enum lm3556_indic_pulse_time {
110 PULSE_TIME_0_MS = 0,
111 PULSE_TIME_32_MS,
112 PULSE_TIME_64_MS,
113 PULSE_TIME_92_MS,
114 PULSE_TIME_128_MS,
115 PULSE_TIME_160_MS,
116 PULSE_TIME_196_MS,
117 PULSE_TIME_224_MS,
118 PULSE_TIME_256_MS,
119 PULSE_TIME_288_MS,
120 PULSE_TIME_320_MS,
121 PULSE_TIME_352_MS,
122 PULSE_TIME_384_MS,
123 PULSE_TIME_416_MS,
124 PULSE_TIME_448_MS,
125 PULSE_TIME_480_MS,
126};
127
128enum lm3556_indic_n_blank {
129 INDIC_N_BLANK_0 = 0,
130 INDIC_N_BLANK_1,
131 INDIC_N_BLANK_2,
132 INDIC_N_BLANK_3,
133 INDIC_N_BLANK_4,
134 INDIC_N_BLANK_5,
135 INDIC_N_BLANK_6,
136 INDIC_N_BLANK_7,
137 INDIC_N_BLANK_8,
138 INDIC_N_BLANK_9,
139 INDIC_N_BLANK_10,
140 INDIC_N_BLANK_11,
141 INDIC_N_BLANK_12,
142 INDIC_N_BLANK_13,
143 INDIC_N_BLANK_14,
144 INDIC_N_BLANK_15,
145};
146
147enum lm3556_indic_period {
148 INDIC_PERIOD_0 = 0,
149 INDIC_PERIOD_1,
150 INDIC_PERIOD_2,
151 INDIC_PERIOD_3,
152 INDIC_PERIOD_4,
153 INDIC_PERIOD_5,
154 INDIC_PERIOD_6,
155 INDIC_PERIOD_7,
156};
157
158enum lm3556_mode {
159 MODES_STASNDBY = 0,
160 MODES_INDIC,
161 MODES_TORCH,
162 MODES_FLASH
163};
164
165#define INDIC_PATTERN_SIZE 4
166
167struct indicator {
168 u8 blinking;
169 u8 period_cnt;
170};
171
172struct lm3556_chip_data {
173 struct device *dev;
174
175 struct led_classdev cdev_flash;
176 struct led_classdev cdev_torch;
177 struct led_classdev cdev_indicator;
178
179 struct lm3556_platform_data *pdata;
180 struct regmap *regmap;
181 struct mutex lock;
182
183 unsigned int last_flag;
184};
185
186/* indicator pattern */
187static struct indicator indicator_pattern[INDIC_PATTERN_SIZE] = {
188 [0] = {(INDIC_N_BLANK_1 << INDIC_N_BLANK_SHIFT)
189 | PULSE_TIME_32_MS, INDIC_PERIOD_1},
190 [1] = {(INDIC_N_BLANK_15 << INDIC_N_BLANK_SHIFT)
191 | PULSE_TIME_32_MS, INDIC_PERIOD_2},
192 [2] = {(INDIC_N_BLANK_10 << INDIC_N_BLANK_SHIFT)
193 | PULSE_TIME_32_MS, INDIC_PERIOD_4},
194 [3] = {(INDIC_N_BLANK_5 << INDIC_N_BLANK_SHIFT)
195 | PULSE_TIME_32_MS, INDIC_PERIOD_7},
196};
197
198/* chip initialize */
199static int __devinit lm3556_chip_init(struct lm3556_chip_data *chip)
200{
201 unsigned int reg_val;
202 int ret;
203 struct lm3556_platform_data *pdata = chip->pdata;
204
205 /* set config register */
206 ret = regmap_read(chip->regmap, REG_CONF, &reg_val);
207 if (ret < 0) {
208 dev_err(chip->dev, "Failed to read REG_CONF Register\n");
209 goto out;
210 }
211
212 reg_val &= (~EX_PIN_CONTROL_MASK);
213 reg_val |= ((pdata->torch_pin_polarity & 0x01)
214 << TORCH_PIN_POLARITY_SHIFT);
215 reg_val |= ((pdata->strobe_usuage & 0x01) << STROBE_USUAGE_SHIFT);
216 reg_val |= ((pdata->strobe_pin_polarity & 0x01)
217 << STROBE_PIN_POLARITY_SHIFT);
218 reg_val |= ((pdata->tx_pin_polarity & 0x01) << TX_PIN_POLARITY_SHIFT);
219 reg_val |= ((pdata->indicator_mode & 0x01) << INDIC_MODE_SHIFT);
220
221 ret = regmap_write(chip->regmap, REG_CONF, reg_val);
222 if (ret < 0) {
223 dev_err(chip->dev, "Failed to write REG_CONF Regisgter\n");
224 goto out;
225 }
226
227 /* set enable register */
228 ret = regmap_read(chip->regmap, REG_ENABLE, &reg_val);
229 if (ret < 0) {
230 dev_err(chip->dev, "Failed to read REG_ENABLE Register\n");
231 goto out;
232 }
233
234 reg_val &= (~EX_PIN_ENABLE_MASK);
235 reg_val |= ((pdata->torch_pin_en & 0x01) << TORCH_PIN_EN_SHIFT);
236 reg_val |= ((pdata->strobe_pin_en & 0x01) << STROBE_PIN_EN_SHIFT);
237 reg_val |= ((pdata->tx_pin_en & 0x01) << TX_PIN_EN_SHIFT);
238
239 ret = regmap_write(chip->regmap, REG_ENABLE, reg_val);
240 if (ret < 0) {
241 dev_err(chip->dev, "Failed to write REG_ENABLE Regisgter\n");
242 goto out;
243 }
244
245out:
246 return ret;
247}
248
249/* chip control */
250static int lm3556_control(struct lm3556_chip_data *chip,
251 u8 brightness, enum lm3556_mode opmode)
252{
253 int ret;
254 struct lm3556_platform_data *pdata = chip->pdata;
255
256 ret = regmap_read(chip->regmap, REG_FLAG, &chip->last_flag);
257 if (ret < 0) {
258 dev_err(chip->dev, "Failed to read REG_FLAG Register\n");
259 goto out;
260 }
261
262 if (chip->last_flag)
263 dev_info(chip->dev, "Last FLAG is 0x%x\n", chip->last_flag);
264
265 /* brightness 0 means off-state */
266 if (!brightness)
267 opmode = MODES_STASNDBY;
268
269 switch (opmode) {
270 case MODES_TORCH:
271 ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
272 TORCH_I_MASK << TORCH_I_SHIFT,
273 (brightness - 1) << TORCH_I_SHIFT);
274
275 if (pdata->torch_pin_en)
276 opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
277 break;
278
279 case MODES_FLASH:
280 ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
281 FLASH_I_MASK << FLASH_I_SHIFT,
282 (brightness - 1) << FLASH_I_SHIFT);
283 break;
284
285 case MODES_INDIC:
286 ret = regmap_update_bits(chip->regmap, REG_I_CTRL,
287 TORCH_I_MASK << TORCH_I_SHIFT,
288 (brightness - 1) << TORCH_I_SHIFT);
289 break;
290
291 case MODES_STASNDBY:
292 if (pdata->torch_pin_en)
293 opmode |= (TORCH_PIN_EN_MASK << TORCH_PIN_EN_SHIFT);
294 break;
295
296 default:
297 return ret;
298 }
299 if (ret < 0) {
300 dev_err(chip->dev, "Failed to write REG_I_CTRL Register\n");
301 goto out;
302 }
303 ret = regmap_update_bits(chip->regmap, REG_ENABLE,
304 MODE_BITS_MASK << MODE_BITS_SHIFT,
305 opmode << MODE_BITS_SHIFT);
306
307out:
308 return ret;
309}
310
311/* torch */
312static void lm3556_torch_brightness_set(struct led_classdev *cdev,
313 enum led_brightness brightness)
314{
315 struct lm3556_chip_data *chip =
316 container_of(cdev, struct lm3556_chip_data, cdev_torch);
317
318 mutex_lock(&chip->lock);
319 lm3556_control(chip, brightness, MODES_TORCH);
320 mutex_unlock(&chip->lock);
321}
322
323/* flash */
324static void lm3556_strobe_brightness_set(struct led_classdev *cdev,
325 enum led_brightness brightness)
326{
327 struct lm3556_chip_data *chip =
328 container_of(cdev, struct lm3556_chip_data, cdev_flash);
329
330 mutex_lock(&chip->lock);
331 lm3556_control(chip, brightness, MODES_FLASH);
332 mutex_unlock(&chip->lock);
333}
334
335/* indicator */
336static void lm3556_indicator_brightness_set(struct led_classdev *cdev,
337 enum led_brightness brightness)
338{
339 struct lm3556_chip_data *chip =
340 container_of(cdev, struct lm3556_chip_data, cdev_indicator);
341
342 mutex_lock(&chip->lock);
343 lm3556_control(chip, brightness, MODES_INDIC);
344 mutex_unlock(&chip->lock);
345}
346
347/* indicator pattern */
348static ssize_t lm3556_indicator_pattern_store(struct device *dev,
349 struct device_attribute *devAttr,
350 const char *buf, size_t size)
351{
352 ssize_t ret;
353 struct led_classdev *led_cdev = dev_get_drvdata(dev);
354 struct lm3556_chip_data *chip =
355 container_of(led_cdev, struct lm3556_chip_data, cdev_indicator);
356 unsigned int state;
357
358 ret = kstrtouint(buf, 10, &state);
359 if (ret)
360 goto out;
361 if (state > INDIC_PATTERN_SIZE - 1)
362 state = INDIC_PATTERN_SIZE - 1;
363
364 ret = regmap_write(chip->regmap, REG_INDIC_BLINK,
365 indicator_pattern[state].blinking);
366 if (ret < 0) {
367 dev_err(chip->dev, "Failed to write REG_ENABLE Regisgter\n");
368 goto out;
369 }
370
371 ret = regmap_write(chip->regmap, REG_INDIC_PERIOD,
372 indicator_pattern[state].period_cnt);
373 if (ret < 0) {
374 dev_err(chip->dev, "Failed to write REG_ENABLE Regisgter\n");
375 goto out;
376 }
377
378 return size;
379out:
380 dev_err(chip->dev, "Indicator pattern doesn't saved\n");
381 return size;
382}
383
384static DEVICE_ATTR(pattern, 0666, NULL, lm3556_indicator_pattern_store);
385
386static const struct regmap_config lm3556_regmap = {
387 .reg_bits = 8,
388 .val_bits = 8,
389 .max_register = REG_MAX,
390};
391
392/* module initialize */
393static int __devinit lm3556_probe(struct i2c_client *client,
394 const struct i2c_device_id *id)
395{
396 struct lm3556_platform_data *pdata = client->dev.platform_data;
397 struct lm3556_chip_data *chip;
398
399 int err;
400
401 if (!i2c_check_functionality(client->adapter, I2C_FUNC_I2C)) {
402 dev_err(&client->dev, "i2c functionality check fail.\n");
403 return -EOPNOTSUPP;
404 }
405
406 if (pdata == NULL) {
407 dev_err(&client->dev, "Needs Platform Data.\n");
408 return -ENODATA;
409 }
410
411 chip =
412 devm_kzalloc(&client->dev, sizeof(struct lm3556_chip_data),
413 GFP_KERNEL);
414 if (!chip)
415 return -ENOMEM;
416
417 chip->dev = &client->dev;
418 chip->pdata = pdata;
419
420 chip->regmap = devm_regmap_init_i2c(client, &lm3556_regmap);
421 if (IS_ERR(chip->regmap)) {
422 err = PTR_ERR(chip->regmap);
423 dev_err(&client->dev, "Failed to allocate register map: %d\n",
424 err);
425 return err;
426 }
427
428 mutex_init(&chip->lock);
429 i2c_set_clientdata(client, chip);
430
431 err = lm3556_chip_init(chip);
432 if (err < 0)
433 goto err_out;
434
435 /* flash */
436 chip->cdev_flash.name = "flash";
437 chip->cdev_flash.max_brightness = 16;
438 chip->cdev_flash.brightness_set = lm3556_strobe_brightness_set;
439 err = led_classdev_register((struct device *)
440 &client->dev, &chip->cdev_flash);
441 if (err < 0)
442 goto err_out;
443 /* torch */
444 chip->cdev_torch.name = "torch";
445 chip->cdev_torch.max_brightness = 8;
446 chip->cdev_torch.brightness_set = lm3556_torch_brightness_set;
447 err = led_classdev_register((struct device *)
448 &client->dev, &chip->cdev_torch);
449 if (err < 0)
450 goto err_create_torch_file;
451 /* indicator */
452 chip->cdev_indicator.name = "indicator";
453 chip->cdev_indicator.max_brightness = 8;
454 chip->cdev_indicator.brightness_set = lm3556_indicator_brightness_set;
455 err = led_classdev_register((struct device *)
456 &client->dev, &chip->cdev_indicator);
457 if (err < 0)
458 goto err_create_indicator_file;
459
460 err = device_create_file(chip->cdev_indicator.dev, &dev_attr_pattern);
461 if (err < 0)
462 goto err_create_pattern_file;
463
464 dev_info(&client->dev, "LM3556 is initialized\n");
465 return 0;
466
467err_create_pattern_file:
468 led_classdev_unregister(&chip->cdev_indicator);
469err_create_indicator_file:
470 led_classdev_unregister(&chip->cdev_torch);
471err_create_torch_file:
472 led_classdev_unregister(&chip->cdev_flash);
473err_out:
474 return err;
475}
476
477static int __devexit lm3556_remove(struct i2c_client *client)
478{
479 struct lm3556_chip_data *chip = i2c_get_clientdata(client);
480
481 device_remove_file(chip->cdev_indicator.dev, &dev_attr_pattern);
482 led_classdev_unregister(&chip->cdev_indicator);
483 led_classdev_unregister(&chip->cdev_torch);
484 led_classdev_unregister(&chip->cdev_flash);
485 regmap_write(chip->regmap, REG_ENABLE, 0);
486 return 0;
487}
488
489static const struct i2c_device_id lm3556_id[] = {
490 {LM3556_NAME, 0},
491 {}
492};
493
494MODULE_DEVICE_TABLE(i2c, lm3556_id);
495
496static struct i2c_driver lm3556_i2c_driver = {
497 .driver = {
498 .name = LM3556_NAME,
499 .owner = THIS_MODULE,
500 .pm = NULL,
501 },
502 .probe = lm3556_probe,
503 .remove = __devexit_p(lm3556_remove),
504 .id_table = lm3556_id,
505};
506
507module_i2c_driver(lm3556_i2c_driver);
508
509MODULE_DESCRIPTION("Texas Instruments Flash Lighting driver for LM3556");
510MODULE_AUTHOR("Daniel Jeong <daniel.jeong@ti.com>");
511MODULE_AUTHOR("G.Shark Jeong <gshark.jeong@gmail.com>");
512MODULE_LICENSE("GPL v2");
diff --git a/include/linux/platform_data/leds-lm3556.h b/include/linux/platform_data/leds-lm3556.h
new file mode 100644
index 00000000000..4b4e7d6b052
--- /dev/null
+++ b/include/linux/platform_data/leds-lm3556.h
@@ -0,0 +1,50 @@
1/*
2 * Simple driver for Texas Instruments LM3556 LED Flash driver chip (Rev0x03)
3 * Copyright (C) 2012 Texas Instruments
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License version 2 as
7 * published by the Free Software Foundation.
8 *
9 */
10
11#ifndef __LINUX_LM3556_H
12#define __LINUX_LM3556_H
13
14#define LM3556_NAME "leds-lm3556"
15
16enum lm3556_pin_polarity {
17 PIN_LOW_ACTIVE = 0,
18 PIN_HIGH_ACTIVE,
19};
20
21enum lm3556_pin_enable {
22 PIN_DISABLED = 0,
23 PIN_ENABLED,
24};
25
26enum lm3556_strobe_usuage {
27 STROBE_EDGE_DETECT = 0,
28 STROBE_LEVEL_DETECT,
29};
30
31enum lm3556_indic_mode {
32 INDIC_MODE_INTERNAL = 0,
33 INDIC_MODE_EXTERNAL,
34};
35
36struct lm3556_platform_data {
37 enum lm3556_pin_enable torch_pin_en;
38 enum lm3556_pin_polarity torch_pin_polarity;
39
40 enum lm3556_strobe_usuage strobe_usuage;
41 enum lm3556_pin_enable strobe_pin_en;
42 enum lm3556_pin_polarity strobe_pin_polarity;
43
44 enum lm3556_pin_enable tx_pin_en;
45 enum lm3556_pin_polarity tx_pin_polarity;
46
47 enum lm3556_indic_mode indicator_mode;
48};
49
50#endif /* __LINUX_LM3556_H */
generated by cgit v1.2.2 (git 2.25.0) at 2025-08-31 09:02:43 -0400