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1/*
2 * Driver for TWL4030/6030 Pulse Width Modulator used as LED driver
3 *
4 * Copyright (C) 2012 Texas Instruments
5 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
6 *
7 * This driver is a complete rewrite of the former pwm-twl6030.c authorded by:
8 * Hemanth V <hemanthv@ti.com>
9 *
10 * This program is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License version 2 as published by
12 * the Free Software Foundation.
13 *
14 * This program is distributed in the hope that it will be useful, but WITHOUT
15 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
16 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
17 * more details.
18 *
19 * You should have received a copy of the GNU General Public License along with
20 * this program. If not, see <http://www.gnu.org/licenses/>.
21 */
22
23#include <linux/module.h>
24#include <linux/of.h>
25#include <linux/platform_device.h>
26#include <linux/pwm.h>
27#include <linux/mfd/twl.h>
28#include <linux/slab.h>
29
30/*
31 * This driver handles the PWM driven LED terminals of TWL4030 and TWL6030.
32 * To generate the signal on TWL4030:
33 * - LEDA uses PWMA
34 * - LEDB uses PWMB
35 * TWL6030 has one LED pin with dedicated LEDPWM
36 */
37
38#define TWL4030_LED_MAX 0x7f
39#define TWL6030_LED_MAX 0xff
40
41/* Registers, bits and macro for TWL4030 */
42#define TWL4030_LEDEN_REG 0x00
43#define TWL4030_PWMA_REG 0x01
44
45#define TWL4030_LEDXON (1 << 0)
46#define TWL4030_LEDXPWM (1 << 4)
47#define TWL4030_LED_PINS (TWL4030_LEDXON | TWL4030_LEDXPWM)
48#define TWL4030_LED_TOGGLE(led, x) ((x) << (led))
49
50/* Register, bits and macro for TWL6030 */
51#define TWL6030_LED_PWM_CTRL1 0xf4
52#define TWL6030_LED_PWM_CTRL2 0xf5
53
54#define TWL6040_LED_MODE_HW 0x00
55#define TWL6040_LED_MODE_ON 0x01
56#define TWL6040_LED_MODE_OFF 0x02
57#define TWL6040_LED_MODE_MASK 0x03
58
59struct twl_pwmled_chip {
60 struct pwm_chip chip;
61 struct mutex mutex;
62};
63
64static inline struct twl_pwmled_chip *to_twl(struct pwm_chip *chip)
65{
66 return container_of(chip, struct twl_pwmled_chip, chip);
67}
68
69static int twl4030_pwmled_config(struct pwm_chip *chip, struct pwm_device *pwm,
70 int duty_ns, int period_ns)
71{
72 int duty_cycle = DIV_ROUND_UP(duty_ns * TWL4030_LED_MAX, period_ns) + 1;
73 u8 pwm_config[2] = { 1, 0 };
74 int base, ret;
75
76 /*
77 * To configure the duty period:
78 * On-cycle is set to 1 (the minimum allowed value)
79 * The off time of 0 is not configurable, so the mapping is:
80 * 0 -> off cycle = 2,
81 * 1 -> off cycle = 2,
82 * 2 -> off cycle = 3,
83 * 126 - > off cycle 127,
84 * 127 - > off cycle 1
85 * When on cycle == off cycle the PWM will be always on
86 */
87 if (duty_cycle == 1)
88 duty_cycle = 2;
89 else if (duty_cycle > TWL4030_LED_MAX)
90 duty_cycle = 1;
91
92 base = pwm->hwpwm * 2 + TWL4030_PWMA_REG;
93
94 pwm_config[1] = duty_cycle;
95
96 ret = twl_i2c_write(TWL4030_MODULE_LED, pwm_config, base, 2);
97 if (ret < 0)
98 dev_err(chip->dev, "%s: Failed to configure PWM\n", pwm->label);
99
100 return ret;
101}
102
103static int twl4030_pwmled_enable(struct pwm_chip *chip, struct pwm_device *pwm)
104{
105 struct twl_pwmled_chip *twl = to_twl(chip);
106 int ret;
107 u8 val;
108
109 mutex_lock(&twl->mutex);
110 ret = twl_i2c_read_u8(TWL4030_MODULE_LED, &val, TWL4030_LEDEN_REG);
111 if (ret < 0) {
112 dev_err(chip->dev, "%s: Failed to read LEDEN\n", pwm->label);
113 goto out;
114 }
115
116 val |= TWL4030_LED_TOGGLE(pwm->hwpwm, TWL4030_LED_PINS);
117
118 ret = twl_i2c_write_u8(TWL4030_MODULE_LED, val, TWL4030_LEDEN_REG);
119 if (ret < 0)
120 dev_err(chip->dev, "%s: Failed to enable PWM\n", pwm->label);
121
122out:
123 mutex_unlock(&twl->mutex);
124 return ret;
125}
126
127static void twl4030_pwmled_disable(struct pwm_chip *chip,
128 struct pwm_device *pwm)
129{
130 struct twl_pwmled_chip *twl = to_twl(chip);
131 int ret;
132 u8 val;
133
134 mutex_lock(&twl->mutex);
135 ret = twl_i2c_read_u8(TWL4030_MODULE_LED, &val, TWL4030_LEDEN_REG);
136 if (ret < 0) {
137 dev_err(chip->dev, "%s: Failed to read LEDEN\n", pwm->label);
138 goto out;
139 }
140
141 val &= ~TWL4030_LED_TOGGLE(pwm->hwpwm, TWL4030_LED_PINS);
142
143 ret = twl_i2c_write_u8(TWL4030_MODULE_LED, val, TWL4030_LEDEN_REG);
144 if (ret < 0)
145 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label);
146
147out:
148 mutex_unlock(&twl->mutex);
149}
150
151static int twl6030_pwmled_config(struct pwm_chip *chip, struct pwm_device *pwm,
152 int duty_ns, int period_ns)
153{
154 int duty_cycle = (duty_ns * TWL6030_LED_MAX) / period_ns;
155 u8 on_time;
156 int ret;
157
158 on_time = duty_cycle & 0xff;
159
160 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, on_time,
161 TWL6030_LED_PWM_CTRL1);
162 if (ret < 0)
163 dev_err(chip->dev, "%s: Failed to configure PWM\n", pwm->label);
164
165 return ret;
166}
167
168static int twl6030_pwmled_enable(struct pwm_chip *chip, struct pwm_device *pwm)
169{
170 struct twl_pwmled_chip *twl = to_twl(chip);
171 int ret;
172 u8 val;
173
174 mutex_lock(&twl->mutex);
175 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
176 if (ret < 0) {
177 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
178 pwm->label);
179 goto out;
180 }
181
182 val &= ~TWL6040_LED_MODE_MASK;
183 val |= TWL6040_LED_MODE_ON;
184
185 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
186 if (ret < 0)
187 dev_err(chip->dev, "%s: Failed to enable PWM\n", pwm->label);
188
189out:
190 mutex_unlock(&twl->mutex);
191 return ret;
192}
193
194static void twl6030_pwmled_disable(struct pwm_chip *chip,
195 struct pwm_device *pwm)
196{
197 struct twl_pwmled_chip *twl = to_twl(chip);
198 int ret;
199 u8 val;
200
201 mutex_lock(&twl->mutex);
202 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
203 if (ret < 0) {
204 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
205 pwm->label);
206 goto out;
207 }
208
209 val &= ~TWL6040_LED_MODE_MASK;
210 val |= TWL6040_LED_MODE_OFF;
211
212 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
213 if (ret < 0)
214 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label);
215
216out:
217 mutex_unlock(&twl->mutex);
218}
219
220static int twl6030_pwmled_request(struct pwm_chip *chip, struct pwm_device *pwm)
221{
222 struct twl_pwmled_chip *twl = to_twl(chip);
223 int ret;
224 u8 val;
225
226 mutex_lock(&twl->mutex);
227 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
228 if (ret < 0) {
229 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
230 pwm->label);
231 goto out;
232 }
233
234 val &= ~TWL6040_LED_MODE_MASK;
235 val |= TWL6040_LED_MODE_OFF;
236
237 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
238 if (ret < 0)
239 dev_err(chip->dev, "%s: Failed to request PWM\n", pwm->label);
240
241out:
242 mutex_unlock(&twl->mutex);
243 return ret;
244}
245
246static void twl6030_pwmled_free(struct pwm_chip *chip, struct pwm_device *pwm)
247{
248 struct twl_pwmled_chip *twl = to_twl(chip);
249 int ret;
250 u8 val;
251
252 mutex_lock(&twl->mutex);
253 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
254 if (ret < 0) {
255 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
256 pwm->label);
257 goto out;
258 }
259
260 val &= ~TWL6040_LED_MODE_MASK;
261 val |= TWL6040_LED_MODE_HW;
262
263 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
264 if (ret < 0)
265 dev_err(chip->dev, "%s: Failed to free PWM\n", pwm->label);
266
267out:
268 mutex_unlock(&twl->mutex);
269}
270
271static const struct pwm_ops twl4030_pwmled_ops = {
272 .enable = twl4030_pwmled_enable,
273 .disable = twl4030_pwmled_disable,
274 .config = twl4030_pwmled_config,
275 .owner = THIS_MODULE,
276};
277
278static const struct pwm_ops twl6030_pwmled_ops = {
279 .enable = twl6030_pwmled_enable,
280 .disable = twl6030_pwmled_disable,
281 .config = twl6030_pwmled_config,
282 .request = twl6030_pwmled_request,
283 .free = twl6030_pwmled_free,
284 .owner = THIS_MODULE,
285};
286
287static int twl_pwmled_probe(struct platform_device *pdev)
288{
289 struct twl_pwmled_chip *twl;
290 int ret;
291
292 twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL);
293 if (!twl)
294 return -ENOMEM;
295
296 if (twl_class_is_4030()) {
297 twl->chip.ops = &twl4030_pwmled_ops;
298 twl->chip.npwm = 2;
299 } else {
300 twl->chip.ops = &twl6030_pwmled_ops;
301 twl->chip.npwm = 1;
302 }
303
304 twl->chip.dev = &pdev->dev;
305 twl->chip.base = -1;
306
307 mutex_init(&twl->mutex);
308
309 ret = pwmchip_add(&twl->chip);
310 if (ret < 0)
311 return ret;
312
313 platform_set_drvdata(pdev, twl);
314
315 return 0;
316}
317
318static int twl_pwmled_remove(struct platform_device *pdev)
319{
320 struct twl_pwmled_chip *twl = platform_get_drvdata(pdev);
321
322 return pwmchip_remove(&twl->chip);
323}
324
325#ifdef CONFIG_OF
326static const struct of_device_id twl_pwmled_of_match[] = {
327 { .compatible = "ti,twl4030-pwmled" },
328 { .compatible = "ti,twl6030-pwmled" },
329 { },
330};
331MODULE_DEVICE_TABLE(of, twl_pwmled_of_match);
332#endif
333
334static struct platform_driver twl_pwmled_driver = {
335 .driver = {
336 .name = "twl-pwmled",
337 .of_match_table = of_match_ptr(twl_pwmled_of_match),
338 },
339 .probe = twl_pwmled_probe,
340 .remove = twl_pwmled_remove,
341};
342module_platform_driver(twl_pwmled_driver);
343
344MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
345MODULE_DESCRIPTION("PWM driver for TWL4030 and TWL6030 LED outputs");
346MODULE_ALIAS("platform:twl-pwmled");
347MODULE_LICENSE("GPL");
1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * Driver for TWL4030/6030 Pulse Width Modulator used as LED driver
4 *
5 * Copyright (C) 2012 Texas Instruments
6 * Author: Peter Ujfalusi <peter.ujfalusi@ti.com>
7 *
8 * This driver is a complete rewrite of the former pwm-twl6030.c authorded by:
9 * Hemanth V <hemanthv@ti.com>
10 */
11
12#include <linux/module.h>
13#include <linux/of.h>
14#include <linux/platform_device.h>
15#include <linux/pwm.h>
16#include <linux/mfd/twl.h>
17#include <linux/slab.h>
18
19/*
20 * This driver handles the PWM driven LED terminals of TWL4030 and TWL6030.
21 * To generate the signal on TWL4030:
22 * - LEDA uses PWMA
23 * - LEDB uses PWMB
24 * TWL6030 has one LED pin with dedicated LEDPWM
25 */
26
27#define TWL4030_LED_MAX 0x7f
28#define TWL6030_LED_MAX 0xff
29
30/* Registers, bits and macro for TWL4030 */
31#define TWL4030_LEDEN_REG 0x00
32#define TWL4030_PWMA_REG 0x01
33
34#define TWL4030_LEDXON (1 << 0)
35#define TWL4030_LEDXPWM (1 << 4)
36#define TWL4030_LED_PINS (TWL4030_LEDXON | TWL4030_LEDXPWM)
37#define TWL4030_LED_TOGGLE(led, x) ((x) << (led))
38
39/* Register, bits and macro for TWL6030 */
40#define TWL6030_LED_PWM_CTRL1 0xf4
41#define TWL6030_LED_PWM_CTRL2 0xf5
42
43#define TWL6040_LED_MODE_HW 0x00
44#define TWL6040_LED_MODE_ON 0x01
45#define TWL6040_LED_MODE_OFF 0x02
46#define TWL6040_LED_MODE_MASK 0x03
47
48struct twl_pwmled_chip {
49 struct pwm_chip chip;
50 struct mutex mutex;
51};
52
53static inline struct twl_pwmled_chip *to_twl(struct pwm_chip *chip)
54{
55 return container_of(chip, struct twl_pwmled_chip, chip);
56}
57
58static int twl4030_pwmled_config(struct pwm_chip *chip, struct pwm_device *pwm,
59 int duty_ns, int period_ns)
60{
61 int duty_cycle = DIV_ROUND_UP(duty_ns * TWL4030_LED_MAX, period_ns) + 1;
62 u8 pwm_config[2] = { 1, 0 };
63 int base, ret;
64
65 /*
66 * To configure the duty period:
67 * On-cycle is set to 1 (the minimum allowed value)
68 * The off time of 0 is not configurable, so the mapping is:
69 * 0 -> off cycle = 2,
70 * 1 -> off cycle = 2,
71 * 2 -> off cycle = 3,
72 * 126 - > off cycle 127,
73 * 127 - > off cycle 1
74 * When on cycle == off cycle the PWM will be always on
75 */
76 if (duty_cycle == 1)
77 duty_cycle = 2;
78 else if (duty_cycle > TWL4030_LED_MAX)
79 duty_cycle = 1;
80
81 base = pwm->hwpwm * 2 + TWL4030_PWMA_REG;
82
83 pwm_config[1] = duty_cycle;
84
85 ret = twl_i2c_write(TWL4030_MODULE_LED, pwm_config, base, 2);
86 if (ret < 0)
87 dev_err(chip->dev, "%s: Failed to configure PWM\n", pwm->label);
88
89 return ret;
90}
91
92static int twl4030_pwmled_enable(struct pwm_chip *chip, struct pwm_device *pwm)
93{
94 struct twl_pwmled_chip *twl = to_twl(chip);
95 int ret;
96 u8 val;
97
98 mutex_lock(&twl->mutex);
99 ret = twl_i2c_read_u8(TWL4030_MODULE_LED, &val, TWL4030_LEDEN_REG);
100 if (ret < 0) {
101 dev_err(chip->dev, "%s: Failed to read LEDEN\n", pwm->label);
102 goto out;
103 }
104
105 val |= TWL4030_LED_TOGGLE(pwm->hwpwm, TWL4030_LED_PINS);
106
107 ret = twl_i2c_write_u8(TWL4030_MODULE_LED, val, TWL4030_LEDEN_REG);
108 if (ret < 0)
109 dev_err(chip->dev, "%s: Failed to enable PWM\n", pwm->label);
110
111out:
112 mutex_unlock(&twl->mutex);
113 return ret;
114}
115
116static void twl4030_pwmled_disable(struct pwm_chip *chip,
117 struct pwm_device *pwm)
118{
119 struct twl_pwmled_chip *twl = to_twl(chip);
120 int ret;
121 u8 val;
122
123 mutex_lock(&twl->mutex);
124 ret = twl_i2c_read_u8(TWL4030_MODULE_LED, &val, TWL4030_LEDEN_REG);
125 if (ret < 0) {
126 dev_err(chip->dev, "%s: Failed to read LEDEN\n", pwm->label);
127 goto out;
128 }
129
130 val &= ~TWL4030_LED_TOGGLE(pwm->hwpwm, TWL4030_LED_PINS);
131
132 ret = twl_i2c_write_u8(TWL4030_MODULE_LED, val, TWL4030_LEDEN_REG);
133 if (ret < 0)
134 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label);
135
136out:
137 mutex_unlock(&twl->mutex);
138}
139
140static int twl6030_pwmled_config(struct pwm_chip *chip, struct pwm_device *pwm,
141 int duty_ns, int period_ns)
142{
143 int duty_cycle = (duty_ns * TWL6030_LED_MAX) / period_ns;
144 u8 on_time;
145 int ret;
146
147 on_time = duty_cycle & 0xff;
148
149 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, on_time,
150 TWL6030_LED_PWM_CTRL1);
151 if (ret < 0)
152 dev_err(chip->dev, "%s: Failed to configure PWM\n", pwm->label);
153
154 return ret;
155}
156
157static int twl6030_pwmled_enable(struct pwm_chip *chip, struct pwm_device *pwm)
158{
159 struct twl_pwmled_chip *twl = to_twl(chip);
160 int ret;
161 u8 val;
162
163 mutex_lock(&twl->mutex);
164 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
165 if (ret < 0) {
166 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
167 pwm->label);
168 goto out;
169 }
170
171 val &= ~TWL6040_LED_MODE_MASK;
172 val |= TWL6040_LED_MODE_ON;
173
174 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
175 if (ret < 0)
176 dev_err(chip->dev, "%s: Failed to enable PWM\n", pwm->label);
177
178out:
179 mutex_unlock(&twl->mutex);
180 return ret;
181}
182
183static void twl6030_pwmled_disable(struct pwm_chip *chip,
184 struct pwm_device *pwm)
185{
186 struct twl_pwmled_chip *twl = to_twl(chip);
187 int ret;
188 u8 val;
189
190 mutex_lock(&twl->mutex);
191 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
192 if (ret < 0) {
193 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
194 pwm->label);
195 goto out;
196 }
197
198 val &= ~TWL6040_LED_MODE_MASK;
199 val |= TWL6040_LED_MODE_OFF;
200
201 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
202 if (ret < 0)
203 dev_err(chip->dev, "%s: Failed to disable PWM\n", pwm->label);
204
205out:
206 mutex_unlock(&twl->mutex);
207}
208
209static int twl6030_pwmled_request(struct pwm_chip *chip, struct pwm_device *pwm)
210{
211 struct twl_pwmled_chip *twl = to_twl(chip);
212 int ret;
213 u8 val;
214
215 mutex_lock(&twl->mutex);
216 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
217 if (ret < 0) {
218 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
219 pwm->label);
220 goto out;
221 }
222
223 val &= ~TWL6040_LED_MODE_MASK;
224 val |= TWL6040_LED_MODE_OFF;
225
226 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
227 if (ret < 0)
228 dev_err(chip->dev, "%s: Failed to request PWM\n", pwm->label);
229
230out:
231 mutex_unlock(&twl->mutex);
232 return ret;
233}
234
235static void twl6030_pwmled_free(struct pwm_chip *chip, struct pwm_device *pwm)
236{
237 struct twl_pwmled_chip *twl = to_twl(chip);
238 int ret;
239 u8 val;
240
241 mutex_lock(&twl->mutex);
242 ret = twl_i2c_read_u8(TWL6030_MODULE_ID1, &val, TWL6030_LED_PWM_CTRL2);
243 if (ret < 0) {
244 dev_err(chip->dev, "%s: Failed to read PWM_CTRL2\n",
245 pwm->label);
246 goto out;
247 }
248
249 val &= ~TWL6040_LED_MODE_MASK;
250 val |= TWL6040_LED_MODE_HW;
251
252 ret = twl_i2c_write_u8(TWL6030_MODULE_ID1, val, TWL6030_LED_PWM_CTRL2);
253 if (ret < 0)
254 dev_err(chip->dev, "%s: Failed to free PWM\n", pwm->label);
255
256out:
257 mutex_unlock(&twl->mutex);
258}
259
260static const struct pwm_ops twl4030_pwmled_ops = {
261 .enable = twl4030_pwmled_enable,
262 .disable = twl4030_pwmled_disable,
263 .config = twl4030_pwmled_config,
264 .owner = THIS_MODULE,
265};
266
267static const struct pwm_ops twl6030_pwmled_ops = {
268 .enable = twl6030_pwmled_enable,
269 .disable = twl6030_pwmled_disable,
270 .config = twl6030_pwmled_config,
271 .request = twl6030_pwmled_request,
272 .free = twl6030_pwmled_free,
273 .owner = THIS_MODULE,
274};
275
276static int twl_pwmled_probe(struct platform_device *pdev)
277{
278 struct twl_pwmled_chip *twl;
279 int ret;
280
281 twl = devm_kzalloc(&pdev->dev, sizeof(*twl), GFP_KERNEL);
282 if (!twl)
283 return -ENOMEM;
284
285 if (twl_class_is_4030()) {
286 twl->chip.ops = &twl4030_pwmled_ops;
287 twl->chip.npwm = 2;
288 } else {
289 twl->chip.ops = &twl6030_pwmled_ops;
290 twl->chip.npwm = 1;
291 }
292
293 twl->chip.dev = &pdev->dev;
294 twl->chip.base = -1;
295
296 mutex_init(&twl->mutex);
297
298 ret = pwmchip_add(&twl->chip);
299 if (ret < 0)
300 return ret;
301
302 platform_set_drvdata(pdev, twl);
303
304 return 0;
305}
306
307static int twl_pwmled_remove(struct platform_device *pdev)
308{
309 struct twl_pwmled_chip *twl = platform_get_drvdata(pdev);
310
311 return pwmchip_remove(&twl->chip);
312}
313
314#ifdef CONFIG_OF
315static const struct of_device_id twl_pwmled_of_match[] = {
316 { .compatible = "ti,twl4030-pwmled" },
317 { .compatible = "ti,twl6030-pwmled" },
318 { },
319};
320MODULE_DEVICE_TABLE(of, twl_pwmled_of_match);
321#endif
322
323static struct platform_driver twl_pwmled_driver = {
324 .driver = {
325 .name = "twl-pwmled",
326 .of_match_table = of_match_ptr(twl_pwmled_of_match),
327 },
328 .probe = twl_pwmled_probe,
329 .remove = twl_pwmled_remove,
330};
331module_platform_driver(twl_pwmled_driver);
332
333MODULE_AUTHOR("Peter Ujfalusi <peter.ujfalusi@ti.com>");
334MODULE_DESCRIPTION("PWM driver for TWL4030 and TWL6030 LED outputs");
335MODULE_ALIAS("platform:twl-pwmled");
336MODULE_LICENSE("GPL");