projects / deliverable / linux.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
mm, oom: do not schedule if current has been killed
[deliverable/linux.git] / drivers / regulator / tps65217-regulator.c
CommitLineData
a493077f
AC		 1/*
2 * tps65217-regulator.c
3 *
4 * Regulator driver for TPS65217 PMIC
5 *
6 * Copyright (C) 2011 Texas Instruments Incorporated - http://www.ti.com/
7 *
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation version 2.
11 *
12 * This program is distributed "as is" WITHOUT ANY WARRANTY of any
13 * kind, whether express or implied; without even the implied warranty
14 * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 * GNU General Public License for more details.
16 */
17
18#include <linux/kernel.h>
19#include <linux/module.h>
20#include <linux/device.h>
21#include <linux/init.h>
22#include <linux/err.h>
23#include <linux/platform_device.h>
24
25#include <linux/regulator/driver.h>
26#include <linux/regulator/machine.h>
27#include <linux/mfd/tps65217.h>
28
d172f319 29#define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t) \
a493077f
AC		 30 { \
31 .name = _name, \
32 .id = _id, \
33 .ops = &_ops, \
34 .n_voltages = _n, \
35 .type = REGULATOR_VOLTAGE, \
36 .owner = THIS_MODULE, \
b4bc9ef6
AL		 37 .vsel_reg = _vr, \
38 .vsel_mask = _vm, \
39 .enable_reg = TPS65217_REG_ENABLE, \
40 .enable_mask = _em, \
d172f319 41 .volt_table = _t, \
a493077f
AC		 42 } \
43
d172f319 44#define TPS65217_INFO(_nm, _min, _max, _f1, _f2) \
a493077f
AC		 45 { \
46 .name = _nm, \
47 .min_uV = _min, \
48 .max_uV = _max, \
49 .vsel_to_uv = _f1, \
50 .uv_to_vsel = _f2, \
a493077f
AC		 51 }
52
d172f319 53static const unsigned int LDO1_VSEL_table[] = {
a493077f
AC		 54 1000000, 1100000, 1200000, 1250000,
55 1300000, 1350000, 1400000, 1500000,
56 1600000, 1800000, 2500000, 2750000,
57 2800000, 3000000, 3100000, 3300000,
58};
59
60static int tps65217_vsel_to_uv1(unsigned int vsel)
61{
62 int uV = 0;
63
64 if (vsel > 63)
65 return -EINVAL;
66
67 if (vsel <= 24)
68 uV = vsel * 25000 + 900000;
69 else if (vsel <= 52)
70 uV = (vsel - 24) * 50000 + 1500000;
71 else if (vsel < 56)
72 uV = (vsel - 52) * 100000 + 2900000;
73 else
74 uV = 3300000;
75
76 return uV;
77}
78
79static int tps65217_uv_to_vsel1(int uV, unsigned int *vsel)
80{
1a5d39d0 81 if (uV < 0 || uV > 3300000)
a493077f
AC		 82 return -EINVAL;
83
84 if (uV <= 1500000)
2fe4e025 85 *vsel = DIV_ROUND_UP(uV - 900000, 25000);
a493077f 86 else if (uV <= 2900000)
2fe4e025 87 *vsel = 24 + DIV_ROUND_UP(uV - 1500000, 50000);
a493077f 88 else if (uV < 3300000)
2fe4e025 89 *vsel = 52 + DIV_ROUND_UP(uV - 2900000, 100000);
a493077f
AC		 90 else
91 *vsel = 56;
92
93 return 0;
94}
95
96static int tps65217_vsel_to_uv2(unsigned int vsel)
97{
98 int uV = 0;
99
100 if (vsel > 31)
101 return -EINVAL;
102
103 if (vsel <= 8)
104 uV = vsel * 50000 + 1500000;
105 else if (vsel <= 13)
106 uV = (vsel - 8) * 100000 + 1900000;
107 else
108 uV = (vsel - 13) * 50000 + 2400000;
109
110 return uV;
111}
112
113static int tps65217_uv_to_vsel2(int uV, unsigned int *vsel)
114{
1a5d39d0 115 if (uV < 0 || uV > 3300000)
a493077f
AC		 116 return -EINVAL;
117
118 if (uV <= 1900000)
2fe4e025 119 *vsel = DIV_ROUND_UP(uV - 1500000, 50000);
a493077f 120 else if (uV <= 2400000)
2fe4e025 121 *vsel = 8 + DIV_ROUND_UP(uV - 1900000, 100000);
a493077f 122 else
2fe4e025 123 *vsel = 13 + DIV_ROUND_UP(uV - 2400000, 50000);
a493077f
AC		 124
125 return 0;
126}
127
128static struct tps_info tps65217_pmic_regs[] = {
129 TPS65217_INFO("DCDC1", 900000, 1800000, tps65217_vsel_to_uv1,
d172f319 130 tps65217_uv_to_vsel1),
a493077f 131 TPS65217_INFO("DCDC2", 900000, 3300000, tps65217_vsel_to_uv1,
d172f319 132 tps65217_uv_to_vsel1),
a493077f 133 TPS65217_INFO("DCDC3", 900000, 1500000, tps65217_vsel_to_uv1,
d172f319
AL		 134 tps65217_uv_to_vsel1),
135 TPS65217_INFO("LDO1", 1000000, 3300000, NULL, NULL),
a493077f 136 TPS65217_INFO("LDO2", 900000, 3300000, tps65217_vsel_to_uv1,
d172f319 137 tps65217_uv_to_vsel1),
a493077f 138 TPS65217_INFO("LDO3", 1800000, 3300000, tps65217_vsel_to_uv2,
d172f319 139 tps65217_uv_to_vsel2),
a493077f 140 TPS65217_INFO("LDO4", 1800000, 3300000, tps65217_vsel_to_uv2,
d172f319 141 tps65217_uv_to_vsel2),
a493077f
AC		 142};
143
fc56911b 144static int tps65217_pmic_enable(struct regulator_dev *dev)
a493077f 145{
a493077f 146 struct tps65217 *tps = rdev_get_drvdata(dev);
fc56911b 147 unsigned int rid = rdev_get_id(dev);
a493077f 148
fc56911b 149 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
a493077f
AC		 150 return -EINVAL;
151
152 /* Enable the regulator and password protection is level 1 */
153 return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
b4bc9ef6
AL		 154 dev->desc->enable_mask, dev->desc->enable_mask,
155 TPS65217_PROTECT_L1);
a493077f
AC		 156}
157
fc56911b 158static int tps65217_pmic_disable(struct regulator_dev *dev)
a493077f
AC		 159{
160 struct tps65217 *tps = rdev_get_drvdata(dev);
fc56911b 161 unsigned int rid = rdev_get_id(dev);
a493077f 162
fc56911b 163 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
a493077f
AC		 164 return -EINVAL;
165
166 /* Disable the regulator and password protection is level 1 */
167 return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
b4bc9ef6 168 dev->desc->enable_mask, TPS65217_PROTECT_L1);
a493077f
AC		 169}
170
8b22285f
AL		 171static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
172 unsigned selector)
a493077f 173{
8b22285f 174 int ret;
a493077f 175 struct tps65217 *tps = rdev_get_drvdata(dev);
8b22285f 176 unsigned int rid = rdev_get_id(dev);
a493077f 177
8b22285f 178 /* Set the voltage based on vsel value and write protect level is 2 */
b4bc9ef6 179 ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
8b22285f 180 selector, TPS65217_PROTECT_L2);
a493077f 181
8b22285f
AL		 182 /* Set GO bit for DCDCx to initiate voltage transistion */
183 switch (rid) {
184 case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
185 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
186 TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
187 TPS65217_PROTECT_L2);
188 break;
189 }
a493077f 190
8b22285f 191 return ret;
a493077f
AC		 192}
193
8b22285f
AL		 194static int tps65217_pmic_map_voltage(struct regulator_dev *dev,
195 int min_uV, int max_uV)
a493077f 196{
8b22285f 197
a493077f 198 struct tps65217 *tps = rdev_get_drvdata(dev);
8b22285f
AL		 199 unsigned int sel, rid = rdev_get_id(dev);
200 int ret;
a493077f 201
8b22285f 202 /* LDO1 uses regulator_map_voltage_iterate() */
fc56911b 203 if (rid == TPS65217_LDO_1)
a493077f
AC		 204 return -EINVAL;
205
fc56911b 206 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
a493077f
AC		 207 return -EINVAL;
208
844e6901
AL		 209 if (min_uV < tps->info[rid]->min_uV)
210 min_uV = tps->info[rid]->min_uV;
a493077f 211
844e6901 212 if (max_uV < tps->info[rid]->min_uV || min_uV > tps->info[rid]->max_uV)
fc56911b
AL		 213 return -EINVAL;
214
8b22285f 215 ret = tps->info[rid]->uv_to_vsel(min_uV, &sel);
a493077f
AC		 216 if (ret)
217 return ret;
218
8b22285f 219 return sel;
a493077f
AC		 220}
221
fc56911b 222static int tps65217_pmic_list_voltage(struct regulator_dev *dev,
a493077f
AC		 223 unsigned selector)
224{
225 struct tps65217 *tps = rdev_get_drvdata(dev);
fc56911b 226 unsigned int rid = rdev_get_id(dev);
a493077f 227
fc56911b 228 if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
a493077f
AC		 229 return -EINVAL;
230
d172f319 231 if (selector >= dev->desc->n_voltages)
a493077f
AC		 232 return -EINVAL;
233
fc56911b 234 return tps->info[rid]->vsel_to_uv(selector);
a493077f
AC		 235}
236
fc56911b
AL		 237/* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
238static struct regulator_ops tps65217_pmic_ops = {
b4bc9ef6 239 .is_enabled = regulator_is_enabled_regmap,
fc56911b
AL		 240 .enable = tps65217_pmic_enable,
241 .disable = tps65217_pmic_disable,
b4bc9ef6 242 .get_voltage_sel = regulator_get_voltage_sel_regmap,
8b22285f 243 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
fc56911b 244 .list_voltage = tps65217_pmic_list_voltage,
8b22285f 245 .map_voltage = tps65217_pmic_map_voltage,
a493077f
AC		 246};
247
248/* Operations permitted on LDO1 */
249static struct regulator_ops tps65217_pmic_ldo1_ops = {
b4bc9ef6 250 .is_enabled = regulator_is_enabled_regmap,
fc56911b
AL		 251 .enable = tps65217_pmic_enable,
252 .disable = tps65217_pmic_disable,
b4bc9ef6 253 .get_voltage_sel = regulator_get_voltage_sel_regmap,
8b22285f 254 .set_voltage_sel = tps65217_pmic_set_voltage_sel,
d172f319 255 .list_voltage = regulator_list_voltage_table,
a493077f
AC		 256};
257
78637a3d 258static const struct regulator_desc regulators[] = {
b4bc9ef6
AL		 259 TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
260 TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
d172f319 261 TPS65217_ENABLE_DC1_EN, NULL),
b4bc9ef6
AL		 262 TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
263 TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
d172f319 264 TPS65217_ENABLE_DC2_EN, NULL),
b4bc9ef6
AL		 265 TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
266 TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
d172f319 267 TPS65217_ENABLE_DC3_EN, NULL),
b4bc9ef6
AL		 268 TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
269 TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
d172f319 270 TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table),
b4bc9ef6
AL		 271 TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
272 TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
d172f319 273 TPS65217_ENABLE_LDO2_EN, NULL),
b4bc9ef6
AL		 274 TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
275 TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
d172f319
AL		 276 TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
277 NULL),
b4bc9ef6
AL		 278 TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
279 TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
d172f319
AL		 280 TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
281 NULL),
a493077f
AC		 282};
283
284static int __devinit tps65217_regulator_probe(struct platform_device *pdev)
285{
286 struct regulator_dev *rdev;
287 struct tps65217 *tps;
288 struct tps_info *info = &tps65217_pmic_regs[pdev->id];
c172708d 289 struct regulator_config config = { };
a493077f
AC		 290
291 /* Already set by core driver */
292 tps = dev_to_tps65217(pdev->dev.parent);
293 tps->info[pdev->id] = info;
294
c172708d 295 config.dev = &pdev->dev;
a7f1b63e 296 config.of_node = pdev->dev.of_node;
c172708d
MB		 297 config.init_data = pdev->dev.platform_data;
298 config.driver_data = tps;
299
300 rdev = regulator_register(&regulators[pdev->id], &config);
a493077f
AC		 301 if (IS_ERR(rdev))
302 return PTR_ERR(rdev);
303
304 platform_set_drvdata(pdev, rdev);
305
306 return 0;
307}
308
309static int __devexit tps65217_regulator_remove(struct platform_device *pdev)
310{
311 struct regulator_dev *rdev = platform_get_drvdata(pdev);
312
313 platform_set_drvdata(pdev, NULL);
314 regulator_unregister(rdev);
315
316 return 0;
317}
318
319static struct platform_driver tps65217_regulator_driver = {
320 .driver = {
321 .name = "tps65217-pmic",
322 },
323 .probe = tps65217_regulator_probe,
324 .remove = __devexit_p(tps65217_regulator_remove),
325};
326
327static int __init tps65217_regulator_init(void)
328{
329 return platform_driver_register(&tps65217_regulator_driver);
330}
331subsys_initcall(tps65217_regulator_init);
332
333static void __exit tps65217_regulator_exit(void)
334{
335 platform_driver_unregister(&tps65217_regulator_driver);
336}
337module_exit(tps65217_regulator_exit);
338
a493077f
AC		 339MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
340MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
341MODULE_ALIAS("platform:tps65217-pmic");
342MODULE_LICENSE("GPL v2");
Linux kernel - Deliverables
This page took 0.064972 seconds and 5 git commands to generate.