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1// SPDX-License-Identifier: GPL-2.0-only
2/*
3 * tps51632-regulator.c -- TI TPS51632
4 *
5 * Regulator driver for TPS51632 3-2-1 Phase D-Cap Step Down Driverless
6 * Controller with serial VID control and DVFS.
7 *
8 * Copyright (c) 2012, NVIDIA Corporation.
9 *
10 * Author: Laxman Dewangan <ldewangan@nvidia.com>
11 */
12
13#include <linux/err.h>
14#include <linux/i2c.h>
15#include <linux/init.h>
16#include <linux/kernel.h>
17#include <linux/module.h>
18#include <linux/of.h>
19#include <linux/of_device.h>
20#include <linux/platform_device.h>
21#include <linux/regmap.h>
22#include <linux/regulator/driver.h>
23#include <linux/regulator/machine.h>
24#include <linux/regulator/of_regulator.h>
25#include <linux/regulator/tps51632-regulator.h>
26#include <linux/slab.h>
27
28/* Register definitions */
29#define TPS51632_VOLTAGE_SELECT_REG 0x0
30#define TPS51632_VOLTAGE_BASE_REG 0x1
31#define TPS51632_OFFSET_REG 0x2
32#define TPS51632_IMON_REG 0x3
33#define TPS51632_VMAX_REG 0x4
34#define TPS51632_DVFS_CONTROL_REG 0x5
35#define TPS51632_POWER_STATE_REG 0x6
36#define TPS51632_SLEW_REGS 0x7
37#define TPS51632_FAULT_REG 0x14
38
39#define TPS51632_MAX_REG 0x15
40
41#define TPS51632_VOUT_MASK 0x7F
42#define TPS51632_VOUT_OFFSET_MASK 0x1F
43#define TPS51632_VMAX_MASK 0x7F
44#define TPS51632_VMAX_LOCK 0x80
45
46/* TPS51632_DVFS_CONTROL_REG */
47#define TPS51632_DVFS_PWMEN 0x1
48#define TPS51632_DVFS_STEP_20 0x2
49#define TPS51632_DVFS_VMAX_PG 0x4
50#define TPS51632_DVFS_PWMRST 0x8
51#define TPS51632_DVFS_OCA_EN 0x10
52#define TPS51632_DVFS_FCCM 0x20
53
54/* TPS51632_POWER_STATE_REG */
55#define TPS51632_POWER_STATE_MASK 0x03
56#define TPS51632_POWER_STATE_MULTI_PHASE_CCM 0x0
57#define TPS51632_POWER_STATE_SINGLE_PHASE_CCM 0x1
58#define TPS51632_POWER_STATE_SINGLE_PHASE_DCM 0x2
59
60#define TPS51632_MIN_VOLTAGE 500000
61#define TPS51632_MAX_VOLTAGE 1520000
62#define TPS51632_VOLTAGE_STEP_10mV 10000
63#define TPS51632_VOLTAGE_STEP_20mV 20000
64#define TPS51632_MAX_VSEL 0x7F
65#define TPS51632_MIN_VSEL 0x19
66#define TPS51632_DEFAULT_RAMP_DELAY 6000
67#define TPS51632_VOLT_VSEL(uV) \
68 (DIV_ROUND_UP(uV - TPS51632_MIN_VOLTAGE, \
69 TPS51632_VOLTAGE_STEP_10mV) + \
70 TPS51632_MIN_VSEL)
71
72/* TPS51632 chip information */
73struct tps51632_chip {
74 struct device *dev;
75 struct regulator_desc desc;
76 struct regulator_dev *rdev;
77 struct regmap *regmap;
78};
79
80static int tps51632_dcdc_set_ramp_delay(struct regulator_dev *rdev,
81 int ramp_delay)
82{
83 struct tps51632_chip *tps = rdev_get_drvdata(rdev);
84 int bit;
85 int ret;
86
87 if (ramp_delay == 0)
88 bit = 0;
89 else
90 bit = DIV_ROUND_UP(ramp_delay, 6000) - 1;
91
92 ret = regmap_write(tps->regmap, TPS51632_SLEW_REGS, BIT(bit));
93 if (ret < 0)
94 dev_err(tps->dev, "SLEW reg write failed, err %d\n", ret);
95 return ret;
96}
97
98static const struct regulator_ops tps51632_dcdc_ops = {
99 .get_voltage_sel = regulator_get_voltage_sel_regmap,
100 .set_voltage_sel = regulator_set_voltage_sel_regmap,
101 .list_voltage = regulator_list_voltage_linear,
102 .set_voltage_time_sel = regulator_set_voltage_time_sel,
103 .set_ramp_delay = tps51632_dcdc_set_ramp_delay,
104};
105
106static int tps51632_init_dcdc(struct tps51632_chip *tps,
107 struct tps51632_regulator_platform_data *pdata)
108{
109 int ret;
110 uint8_t control = 0;
111 int vsel;
112
113 if (!pdata->enable_pwm_dvfs)
114 goto skip_pwm_config;
115
116 control |= TPS51632_DVFS_PWMEN;
117 vsel = TPS51632_VOLT_VSEL(pdata->base_voltage_uV);
118 ret = regmap_write(tps->regmap, TPS51632_VOLTAGE_BASE_REG, vsel);
119 if (ret < 0) {
120 dev_err(tps->dev, "BASE reg write failed, err %d\n", ret);
121 return ret;
122 }
123
124 if (pdata->dvfs_step_20mV)
125 control |= TPS51632_DVFS_STEP_20;
126
127 if (pdata->max_voltage_uV) {
128 unsigned int vmax;
129 /**
130 * TPS51632 hw behavior: VMAX register can be write only
131 * once as it get locked after first write. The lock get
132 * reset only when device is power-reset.
133 * Write register only when lock bit is not enabled.
134 */
135 ret = regmap_read(tps->regmap, TPS51632_VMAX_REG, &vmax);
136 if (ret < 0) {
137 dev_err(tps->dev, "VMAX read failed, err %d\n", ret);
138 return ret;
139 }
140 if (!(vmax & TPS51632_VMAX_LOCK)) {
141 vsel = TPS51632_VOLT_VSEL(pdata->max_voltage_uV);
142 ret = regmap_write(tps->regmap, TPS51632_VMAX_REG,
143 vsel);
144 if (ret < 0) {
145 dev_err(tps->dev,
146 "VMAX write failed, err %d\n", ret);
147 return ret;
148 }
149 }
150 }
151
152skip_pwm_config:
153 ret = regmap_write(tps->regmap, TPS51632_DVFS_CONTROL_REG, control);
154 if (ret < 0)
155 dev_err(tps->dev, "DVFS reg write failed, err %d\n", ret);
156 return ret;
157}
158
159static bool is_volatile_reg(struct device *dev, unsigned int reg)
160{
161 switch (reg) {
162 case TPS51632_OFFSET_REG:
163 case TPS51632_FAULT_REG:
164 case TPS51632_IMON_REG:
165 return true;
166 default:
167 return false;
168 }
169}
170
171static bool is_read_reg(struct device *dev, unsigned int reg)
172{
173 switch (reg) {
174 case 0x08 ... 0x0F:
175 return false;
176 default:
177 return true;
178 }
179}
180
181static bool is_write_reg(struct device *dev, unsigned int reg)
182{
183 switch (reg) {
184 case TPS51632_VOLTAGE_SELECT_REG:
185 case TPS51632_VOLTAGE_BASE_REG:
186 case TPS51632_VMAX_REG:
187 case TPS51632_DVFS_CONTROL_REG:
188 case TPS51632_POWER_STATE_REG:
189 case TPS51632_SLEW_REGS:
190 return true;
191 default:
192 return false;
193 }
194}
195
196static const struct regmap_config tps51632_regmap_config = {
197 .reg_bits = 8,
198 .val_bits = 8,
199 .writeable_reg = is_write_reg,
200 .readable_reg = is_read_reg,
201 .volatile_reg = is_volatile_reg,
202 .max_register = TPS51632_MAX_REG - 1,
203 .cache_type = REGCACHE_RBTREE,
204};
205
206#if defined(CONFIG_OF)
207static const struct of_device_id tps51632_of_match[] = {
208 { .compatible = "ti,tps51632",},
209 {},
210};
211MODULE_DEVICE_TABLE(of, tps51632_of_match);
212
213static struct tps51632_regulator_platform_data *
214 of_get_tps51632_platform_data(struct device *dev,
215 const struct regulator_desc *desc)
216{
217 struct tps51632_regulator_platform_data *pdata;
218 struct device_node *np = dev->of_node;
219
220 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
221 if (!pdata)
222 return NULL;
223
224 pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node,
225 desc);
226 if (!pdata->reg_init_data) {
227 dev_err(dev, "Not able to get OF regulator init data\n");
228 return NULL;
229 }
230
231 pdata->enable_pwm_dvfs =
232 of_property_read_bool(np, "ti,enable-pwm-dvfs");
233 pdata->dvfs_step_20mV = of_property_read_bool(np, "ti,dvfs-step-20mV");
234
235 pdata->base_voltage_uV = pdata->reg_init_data->constraints.min_uV ? :
236 TPS51632_MIN_VOLTAGE;
237 pdata->max_voltage_uV = pdata->reg_init_data->constraints.max_uV ? :
238 TPS51632_MAX_VOLTAGE;
239 return pdata;
240}
241#else
242static struct tps51632_regulator_platform_data *
243 of_get_tps51632_platform_data(struct device *dev,
244 const struct regulator_desc *desc)
245{
246 return NULL;
247}
248#endif
249
250static int tps51632_probe(struct i2c_client *client)
251{
252 struct tps51632_regulator_platform_data *pdata;
253 struct regulator_dev *rdev;
254 struct tps51632_chip *tps;
255 int ret;
256 struct regulator_config config = { };
257
258 if (client->dev.of_node) {
259 const struct of_device_id *match;
260 match = of_match_device(of_match_ptr(tps51632_of_match),
261 &client->dev);
262 if (!match) {
263 dev_err(&client->dev, "Error: No device match found\n");
264 return -ENODEV;
265 }
266 }
267
268 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
269 if (!tps)
270 return -ENOMEM;
271
272 tps->dev = &client->dev;
273 tps->desc.name = client->name;
274 tps->desc.id = 0;
275 tps->desc.ramp_delay = TPS51632_DEFAULT_RAMP_DELAY;
276 tps->desc.min_uV = TPS51632_MIN_VOLTAGE;
277 tps->desc.uV_step = TPS51632_VOLTAGE_STEP_10mV;
278 tps->desc.linear_min_sel = TPS51632_MIN_VSEL;
279 tps->desc.n_voltages = TPS51632_MAX_VSEL + 1;
280 tps->desc.ops = &tps51632_dcdc_ops;
281 tps->desc.type = REGULATOR_VOLTAGE;
282 tps->desc.owner = THIS_MODULE;
283
284 pdata = dev_get_platdata(&client->dev);
285 if (!pdata && client->dev.of_node)
286 pdata = of_get_tps51632_platform_data(&client->dev, &tps->desc);
287 if (!pdata) {
288 dev_err(&client->dev, "No Platform data\n");
289 return -EINVAL;
290 }
291
292 if (pdata->enable_pwm_dvfs) {
293 if ((pdata->base_voltage_uV < TPS51632_MIN_VOLTAGE) ||
294 (pdata->base_voltage_uV > TPS51632_MAX_VOLTAGE)) {
295 dev_err(&client->dev, "Invalid base_voltage_uV setting\n");
296 return -EINVAL;
297 }
298
299 if ((pdata->max_voltage_uV) &&
300 ((pdata->max_voltage_uV < TPS51632_MIN_VOLTAGE) ||
301 (pdata->max_voltage_uV > TPS51632_MAX_VOLTAGE))) {
302 dev_err(&client->dev, "Invalid max_voltage_uV setting\n");
303 return -EINVAL;
304 }
305 }
306
307 if (pdata->enable_pwm_dvfs)
308 tps->desc.vsel_reg = TPS51632_VOLTAGE_BASE_REG;
309 else
310 tps->desc.vsel_reg = TPS51632_VOLTAGE_SELECT_REG;
311 tps->desc.vsel_mask = TPS51632_VOUT_MASK;
312
313 tps->regmap = devm_regmap_init_i2c(client, &tps51632_regmap_config);
314 if (IS_ERR(tps->regmap)) {
315 ret = PTR_ERR(tps->regmap);
316 dev_err(&client->dev, "regmap init failed, err %d\n", ret);
317 return ret;
318 }
319 i2c_set_clientdata(client, tps);
320
321 ret = tps51632_init_dcdc(tps, pdata);
322 if (ret < 0) {
323 dev_err(tps->dev, "Init failed, err = %d\n", ret);
324 return ret;
325 }
326
327 /* Register the regulators */
328 config.dev = &client->dev;
329 config.init_data = pdata->reg_init_data;
330 config.driver_data = tps;
331 config.regmap = tps->regmap;
332 config.of_node = client->dev.of_node;
333
334 rdev = devm_regulator_register(&client->dev, &tps->desc, &config);
335 if (IS_ERR(rdev)) {
336 dev_err(tps->dev, "regulator register failed\n");
337 return PTR_ERR(rdev);
338 }
339
340 tps->rdev = rdev;
341 return 0;
342}
343
344static const struct i2c_device_id tps51632_id[] = {
345 {.name = "tps51632",},
346 {},
347};
348
349MODULE_DEVICE_TABLE(i2c, tps51632_id);
350
351static struct i2c_driver tps51632_i2c_driver = {
352 .driver = {
353 .name = "tps51632",
354 .of_match_table = of_match_ptr(tps51632_of_match),
355 },
356 .probe_new = tps51632_probe,
357 .id_table = tps51632_id,
358};
359
360static int __init tps51632_init(void)
361{
362 return i2c_add_driver(&tps51632_i2c_driver);
363}
364subsys_initcall(tps51632_init);
365
366static void __exit tps51632_cleanup(void)
367{
368 i2c_del_driver(&tps51632_i2c_driver);
369}
370module_exit(tps51632_cleanup);
371
372MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
373MODULE_DESCRIPTION("TPS51632 voltage regulator driver");
374MODULE_LICENSE("GPL v2");
1/*
2 * tps51632-regulator.c -- TI TPS51632
3 *
4 * Regulator driver for TPS51632 3-2-1 Phase D-Cap Step Down Driverless
5 * Controller with serial VID control and DVFS.
6 *
7 * Copyright (c) 2012, NVIDIA Corporation.
8 *
9 * Author: Laxman Dewangan <ldewangan@nvidia.com>
10 *
11 * This program is free software; you can redistribute it and/or
12 * modify it under the terms of the GNU General Public License as
13 * published by the Free Software Foundation version 2.
14 *
15 * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
16 * whether express or implied; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
18 * General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
23 * 02111-1307, USA
24 */
25
26#include <linux/err.h>
27#include <linux/i2c.h>
28#include <linux/init.h>
29#include <linux/kernel.h>
30#include <linux/module.h>
31#include <linux/of.h>
32#include <linux/of_device.h>
33#include <linux/platform_device.h>
34#include <linux/regmap.h>
35#include <linux/regulator/driver.h>
36#include <linux/regulator/machine.h>
37#include <linux/regulator/of_regulator.h>
38#include <linux/regulator/tps51632-regulator.h>
39#include <linux/slab.h>
40
41/* Register definitions */
42#define TPS51632_VOLTAGE_SELECT_REG 0x0
43#define TPS51632_VOLTAGE_BASE_REG 0x1
44#define TPS51632_OFFSET_REG 0x2
45#define TPS51632_IMON_REG 0x3
46#define TPS51632_VMAX_REG 0x4
47#define TPS51632_DVFS_CONTROL_REG 0x5
48#define TPS51632_POWER_STATE_REG 0x6
49#define TPS51632_SLEW_REGS 0x7
50#define TPS51632_FAULT_REG 0x14
51
52#define TPS51632_MAX_REG 0x15
53
54#define TPS51632_VOUT_MASK 0x7F
55#define TPS51632_VOUT_OFFSET_MASK 0x1F
56#define TPS51632_VMAX_MASK 0x7F
57#define TPS51632_VMAX_LOCK 0x80
58
59/* TPS51632_DVFS_CONTROL_REG */
60#define TPS51632_DVFS_PWMEN 0x1
61#define TPS51632_DVFS_STEP_20 0x2
62#define TPS51632_DVFS_VMAX_PG 0x4
63#define TPS51632_DVFS_PWMRST 0x8
64#define TPS51632_DVFS_OCA_EN 0x10
65#define TPS51632_DVFS_FCCM 0x20
66
67/* TPS51632_POWER_STATE_REG */
68#define TPS51632_POWER_STATE_MASK 0x03
69#define TPS51632_POWER_STATE_MULTI_PHASE_CCM 0x0
70#define TPS51632_POWER_STATE_SINGLE_PHASE_CCM 0x1
71#define TPS51632_POWER_STATE_SINGLE_PHASE_DCM 0x2
72
73#define TPS51632_MIN_VOLTAGE 500000
74#define TPS51632_MAX_VOLTAGE 1520000
75#define TPS51632_VOLTAGE_STEP_10mV 10000
76#define TPS51632_VOLTAGE_STEP_20mV 20000
77#define TPS51632_MAX_VSEL 0x7F
78#define TPS51632_MIN_VSEL 0x19
79#define TPS51632_DEFAULT_RAMP_DELAY 6000
80#define TPS51632_VOLT_VSEL(uV) \
81 (DIV_ROUND_UP(uV - TPS51632_MIN_VOLTAGE, \
82 TPS51632_VOLTAGE_STEP_10mV) + \
83 TPS51632_MIN_VSEL)
84
85/* TPS51632 chip information */
86struct tps51632_chip {
87 struct device *dev;
88 struct regulator_desc desc;
89 struct regulator_dev *rdev;
90 struct regmap *regmap;
91};
92
93static int tps51632_dcdc_set_ramp_delay(struct regulator_dev *rdev,
94 int ramp_delay)
95{
96 struct tps51632_chip *tps = rdev_get_drvdata(rdev);
97 int bit = ramp_delay/6000;
98 int ret;
99
100 if (bit)
101 bit--;
102 ret = regmap_write(tps->regmap, TPS51632_SLEW_REGS, BIT(bit));
103 if (ret < 0)
104 dev_err(tps->dev, "SLEW reg write failed, err %d\n", ret);
105 return ret;
106}
107
108static struct regulator_ops tps51632_dcdc_ops = {
109 .get_voltage_sel = regulator_get_voltage_sel_regmap,
110 .set_voltage_sel = regulator_set_voltage_sel_regmap,
111 .list_voltage = regulator_list_voltage_linear,
112 .set_voltage_time_sel = regulator_set_voltage_time_sel,
113 .set_ramp_delay = tps51632_dcdc_set_ramp_delay,
114};
115
116static int tps51632_init_dcdc(struct tps51632_chip *tps,
117 struct tps51632_regulator_platform_data *pdata)
118{
119 int ret;
120 uint8_t control = 0;
121 int vsel;
122
123 if (!pdata->enable_pwm_dvfs)
124 goto skip_pwm_config;
125
126 control |= TPS51632_DVFS_PWMEN;
127 vsel = TPS51632_VOLT_VSEL(pdata->base_voltage_uV);
128 ret = regmap_write(tps->regmap, TPS51632_VOLTAGE_BASE_REG, vsel);
129 if (ret < 0) {
130 dev_err(tps->dev, "BASE reg write failed, err %d\n", ret);
131 return ret;
132 }
133
134 if (pdata->dvfs_step_20mV)
135 control |= TPS51632_DVFS_STEP_20;
136
137 if (pdata->max_voltage_uV) {
138 unsigned int vmax;
139 /**
140 * TPS51632 hw behavior: VMAX register can be write only
141 * once as it get locked after first write. The lock get
142 * reset only when device is power-reset.
143 * Write register only when lock bit is not enabled.
144 */
145 ret = regmap_read(tps->regmap, TPS51632_VMAX_REG, &vmax);
146 if (ret < 0) {
147 dev_err(tps->dev, "VMAX read failed, err %d\n", ret);
148 return ret;
149 }
150 if (!(vmax & TPS51632_VMAX_LOCK)) {
151 vsel = TPS51632_VOLT_VSEL(pdata->max_voltage_uV);
152 ret = regmap_write(tps->regmap, TPS51632_VMAX_REG,
153 vsel);
154 if (ret < 0) {
155 dev_err(tps->dev,
156 "VMAX write failed, err %d\n", ret);
157 return ret;
158 }
159 }
160 }
161
162skip_pwm_config:
163 ret = regmap_write(tps->regmap, TPS51632_DVFS_CONTROL_REG, control);
164 if (ret < 0)
165 dev_err(tps->dev, "DVFS reg write failed, err %d\n", ret);
166 return ret;
167}
168
169static bool is_volatile_reg(struct device *dev, unsigned int reg)
170{
171 switch (reg) {
172 case TPS51632_OFFSET_REG:
173 case TPS51632_FAULT_REG:
174 case TPS51632_IMON_REG:
175 return true;
176 default:
177 return false;
178 }
179}
180
181static bool is_read_reg(struct device *dev, unsigned int reg)
182{
183 switch (reg) {
184 case 0x08 ... 0x0F:
185 return false;
186 default:
187 return true;
188 }
189}
190
191static bool is_write_reg(struct device *dev, unsigned int reg)
192{
193 switch (reg) {
194 case TPS51632_VOLTAGE_SELECT_REG:
195 case TPS51632_VOLTAGE_BASE_REG:
196 case TPS51632_VMAX_REG:
197 case TPS51632_DVFS_CONTROL_REG:
198 case TPS51632_POWER_STATE_REG:
199 case TPS51632_SLEW_REGS:
200 return true;
201 default:
202 return false;
203 }
204}
205
206static const struct regmap_config tps51632_regmap_config = {
207 .reg_bits = 8,
208 .val_bits = 8,
209 .writeable_reg = is_write_reg,
210 .readable_reg = is_read_reg,
211 .volatile_reg = is_volatile_reg,
212 .max_register = TPS51632_MAX_REG - 1,
213 .cache_type = REGCACHE_RBTREE,
214};
215
216#if defined(CONFIG_OF)
217static const struct of_device_id tps51632_of_match[] = {
218 { .compatible = "ti,tps51632",},
219 {},
220};
221MODULE_DEVICE_TABLE(of, tps51632_of_match);
222
223static struct tps51632_regulator_platform_data *
224 of_get_tps51632_platform_data(struct device *dev,
225 const struct regulator_desc *desc)
226{
227 struct tps51632_regulator_platform_data *pdata;
228 struct device_node *np = dev->of_node;
229
230 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
231 if (!pdata)
232 return NULL;
233
234 pdata->reg_init_data = of_get_regulator_init_data(dev, dev->of_node,
235 desc);
236 if (!pdata->reg_init_data) {
237 dev_err(dev, "Not able to get OF regulator init data\n");
238 return NULL;
239 }
240
241 pdata->enable_pwm_dvfs =
242 of_property_read_bool(np, "ti,enable-pwm-dvfs");
243 pdata->dvfs_step_20mV = of_property_read_bool(np, "ti,dvfs-step-20mV");
244
245 pdata->base_voltage_uV = pdata->reg_init_data->constraints.min_uV ? :
246 TPS51632_MIN_VOLTAGE;
247 pdata->max_voltage_uV = pdata->reg_init_data->constraints.max_uV ? :
248 TPS51632_MAX_VOLTAGE;
249 return pdata;
250}
251#else
252static struct tps51632_regulator_platform_data *
253 of_get_tps51632_platform_data(struct device *dev,
254 const struct regulator_desc *desc)
255{
256 return NULL;
257}
258#endif
259
260static int tps51632_probe(struct i2c_client *client,
261 const struct i2c_device_id *id)
262{
263 struct tps51632_regulator_platform_data *pdata;
264 struct regulator_dev *rdev;
265 struct tps51632_chip *tps;
266 int ret;
267 struct regulator_config config = { };
268
269 if (client->dev.of_node) {
270 const struct of_device_id *match;
271 match = of_match_device(of_match_ptr(tps51632_of_match),
272 &client->dev);
273 if (!match) {
274 dev_err(&client->dev, "Error: No device match found\n");
275 return -ENODEV;
276 }
277 }
278
279 tps = devm_kzalloc(&client->dev, sizeof(*tps), GFP_KERNEL);
280 if (!tps)
281 return -ENOMEM;
282
283 tps->dev = &client->dev;
284 tps->desc.name = client->name;
285 tps->desc.id = 0;
286 tps->desc.ramp_delay = TPS51632_DEFAULT_RAMP_DELAY;
287 tps->desc.min_uV = TPS51632_MIN_VOLTAGE;
288 tps->desc.uV_step = TPS51632_VOLTAGE_STEP_10mV;
289 tps->desc.linear_min_sel = TPS51632_MIN_VSEL;
290 tps->desc.n_voltages = TPS51632_MAX_VSEL + 1;
291 tps->desc.ops = &tps51632_dcdc_ops;
292 tps->desc.type = REGULATOR_VOLTAGE;
293 tps->desc.owner = THIS_MODULE;
294
295 pdata = dev_get_platdata(&client->dev);
296 if (!pdata && client->dev.of_node)
297 pdata = of_get_tps51632_platform_data(&client->dev, &tps->desc);
298 if (!pdata) {
299 dev_err(&client->dev, "No Platform data\n");
300 return -EINVAL;
301 }
302
303 if (pdata->enable_pwm_dvfs) {
304 if ((pdata->base_voltage_uV < TPS51632_MIN_VOLTAGE) ||
305 (pdata->base_voltage_uV > TPS51632_MAX_VOLTAGE)) {
306 dev_err(&client->dev, "Invalid base_voltage_uV setting\n");
307 return -EINVAL;
308 }
309
310 if ((pdata->max_voltage_uV) &&
311 ((pdata->max_voltage_uV < TPS51632_MIN_VOLTAGE) ||
312 (pdata->max_voltage_uV > TPS51632_MAX_VOLTAGE))) {
313 dev_err(&client->dev, "Invalid max_voltage_uV setting\n");
314 return -EINVAL;
315 }
316 }
317
318 if (pdata->enable_pwm_dvfs)
319 tps->desc.vsel_reg = TPS51632_VOLTAGE_BASE_REG;
320 else
321 tps->desc.vsel_reg = TPS51632_VOLTAGE_SELECT_REG;
322 tps->desc.vsel_mask = TPS51632_VOUT_MASK;
323
324 tps->regmap = devm_regmap_init_i2c(client, &tps51632_regmap_config);
325 if (IS_ERR(tps->regmap)) {
326 ret = PTR_ERR(tps->regmap);
327 dev_err(&client->dev, "regmap init failed, err %d\n", ret);
328 return ret;
329 }
330 i2c_set_clientdata(client, tps);
331
332 ret = tps51632_init_dcdc(tps, pdata);
333 if (ret < 0) {
334 dev_err(tps->dev, "Init failed, err = %d\n", ret);
335 return ret;
336 }
337
338 /* Register the regulators */
339 config.dev = &client->dev;
340 config.init_data = pdata->reg_init_data;
341 config.driver_data = tps;
342 config.regmap = tps->regmap;
343 config.of_node = client->dev.of_node;
344
345 rdev = devm_regulator_register(&client->dev, &tps->desc, &config);
346 if (IS_ERR(rdev)) {
347 dev_err(tps->dev, "regulator register failed\n");
348 return PTR_ERR(rdev);
349 }
350
351 tps->rdev = rdev;
352 return 0;
353}
354
355static const struct i2c_device_id tps51632_id[] = {
356 {.name = "tps51632",},
357 {},
358};
359
360MODULE_DEVICE_TABLE(i2c, tps51632_id);
361
362static struct i2c_driver tps51632_i2c_driver = {
363 .driver = {
364 .name = "tps51632",
365 .of_match_table = of_match_ptr(tps51632_of_match),
366 },
367 .probe = tps51632_probe,
368 .id_table = tps51632_id,
369};
370
371static int __init tps51632_init(void)
372{
373 return i2c_add_driver(&tps51632_i2c_driver);
374}
375subsys_initcall(tps51632_init);
376
377static void __exit tps51632_cleanup(void)
378{
379 i2c_del_driver(&tps51632_i2c_driver);
380}
381module_exit(tps51632_cleanup);
382
383MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
384MODULE_DESCRIPTION("TPS51632 voltage regulator driver");
385MODULE_LICENSE("GPL v2");