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Linux/drivers/regulator/tps65217-regulator.c

  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/of_regulator.h>
 26 #include <linux/regulator/driver.h>
 27 #include <linux/regulator/machine.h>
 28 #include <linux/mfd/tps65217.h>
 29 
 30 #define TPS65217_REGULATOR(_name, _id, _ops, _n, _vr, _vm, _em, _t, _lr, _nlr) \
 31         {                                               \
 32                 .name           = _name,                \
 33                 .id             = _id,                  \
 34                 .ops            = &_ops,                \
 35                 .n_voltages     = _n,                   \
 36                 .type           = REGULATOR_VOLTAGE,    \
 37                 .owner          = THIS_MODULE,          \
 38                 .vsel_reg       = _vr,                  \
 39                 .vsel_mask      = _vm,                  \
 40                 .enable_reg     = TPS65217_REG_ENABLE,  \
 41                 .enable_mask    = _em,                  \
 42                 .volt_table     = _t,                   \
 43                 .linear_ranges  = _lr,                  \
 44                 .n_linear_ranges = _nlr,                \
 45         }                                               \
 46 
 47 static const unsigned int LDO1_VSEL_table[] = {
 48         1000000, 1100000, 1200000, 1250000,
 49         1300000, 1350000, 1400000, 1500000,
 50         1600000, 1800000, 2500000, 2750000,
 51         2800000, 3000000, 3100000, 3300000,
 52 };
 53 
 54 static const struct regulator_linear_range tps65217_uv1_ranges[] = {
 55         REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
 56         REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
 57         REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
 58         REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
 59         REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
 60 };
 61 
 62 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
 63         REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
 64         REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
 65         REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
 66 };
 67 
 68 static int tps65217_pmic_enable(struct regulator_dev *dev)
 69 {
 70         struct tps65217 *tps = rdev_get_drvdata(dev);
 71         unsigned int rid = rdev_get_id(dev);
 72 
 73         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 74                 return -EINVAL;
 75 
 76         /* Enable the regulator and password protection is level 1 */
 77         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
 78                                  dev->desc->enable_mask, dev->desc->enable_mask,
 79                                  TPS65217_PROTECT_L1);
 80 }
 81 
 82 static int tps65217_pmic_disable(struct regulator_dev *dev)
 83 {
 84         struct tps65217 *tps = rdev_get_drvdata(dev);
 85         unsigned int rid = rdev_get_id(dev);
 86 
 87         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 88                 return -EINVAL;
 89 
 90         /* Disable the regulator and password protection is level 1 */
 91         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
 92                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
 93 }
 94 
 95 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
 96                                          unsigned selector)
 97 {
 98         int ret;
 99         struct tps65217 *tps = rdev_get_drvdata(dev);
100         unsigned int rid = rdev_get_id(dev);
101 
102         /* Set the voltage based on vsel value and write protect level is 2 */
103         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
104                                 selector, TPS65217_PROTECT_L2);
105 
106         /* Set GO bit for DCDCx to initiate voltage transistion */
107         switch (rid) {
108         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
109                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
110                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
111                                        TPS65217_PROTECT_L2);
112                 break;
113         }
114 
115         return ret;
116 }
117 
118 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
119 static struct regulator_ops tps65217_pmic_ops = {
120         .is_enabled             = regulator_is_enabled_regmap,
121         .enable                 = tps65217_pmic_enable,
122         .disable                = tps65217_pmic_disable,
123         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
124         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
125         .list_voltage           = regulator_list_voltage_linear_range,
126         .map_voltage            = regulator_map_voltage_linear_range,
127 };
128 
129 /* Operations permitted on LDO1 */
130 static struct regulator_ops tps65217_pmic_ldo1_ops = {
131         .is_enabled             = regulator_is_enabled_regmap,
132         .enable                 = tps65217_pmic_enable,
133         .disable                = tps65217_pmic_disable,
134         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
135         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
136         .list_voltage           = regulator_list_voltage_table,
137         .map_voltage            = regulator_map_voltage_ascend,
138 };
139 
140 static const struct regulator_desc regulators[] = {
141         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
142                            TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
143                            TPS65217_ENABLE_DC1_EN, NULL, tps65217_uv1_ranges,
144                            2),  /* DCDC1 voltage range: 900000 ~ 1800000 */
145         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
146                            TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
147                            TPS65217_ENABLE_DC2_EN, NULL, tps65217_uv1_ranges,
148                            ARRAY_SIZE(tps65217_uv1_ranges)),
149         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
150                            TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
151                            TPS65217_ENABLE_DC3_EN, NULL, tps65217_uv1_ranges,
152                            1),  /* DCDC3 voltage range: 900000 ~ 1500000 */
153         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
154                            TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
155                            TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table, NULL, 0),
156         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
157                            TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
158                            TPS65217_ENABLE_LDO2_EN, NULL, tps65217_uv1_ranges,
159                            ARRAY_SIZE(tps65217_uv1_ranges)),
160         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
161                            TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
162                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
163                            NULL, tps65217_uv2_ranges,
164                            ARRAY_SIZE(tps65217_uv2_ranges)),
165         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
166                            TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
167                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
168                            NULL, tps65217_uv2_ranges,
169                            ARRAY_SIZE(tps65217_uv2_ranges)),
170 };
171 
172 #ifdef CONFIG_OF
173 static struct of_regulator_match reg_matches[] = {
174         { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },
175         { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },
176         { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },
177         { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },
178         { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },
179         { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },
180         { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },
181 };
182 
183 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
184 {
185         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
186         struct device_node *node = tps->dev->of_node;
187         struct tps65217_board *pdata;
188         struct device_node *regs;
189         int i, count;
190 
191         regs = of_get_child_by_name(node, "regulators");
192         if (!regs)
193                 return NULL;
194 
195         count = of_regulator_match(&pdev->dev, regs, reg_matches,
196                                    TPS65217_NUM_REGULATOR);
197         of_node_put(regs);
198         if ((count < 0) || (count > TPS65217_NUM_REGULATOR))
199                 return NULL;
200 
201         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
202         if (!pdata)
203                 return NULL;
204 
205         for (i = 0; i < count; i++) {
206                 if (!reg_matches[i].of_node)
207                         continue;
208 
209                 pdata->tps65217_init_data[i] = reg_matches[i].init_data;
210                 pdata->of_node[i] = reg_matches[i].of_node;
211         }
212 
213         return pdata;
214 }
215 #else
216 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
217 {
218         return NULL;
219 }
220 #endif
221 
222 static int tps65217_regulator_probe(struct platform_device *pdev)
223 {
224         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
225         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
226         struct regulator_dev *rdev;
227         struct regulator_config config = { };
228         int i;
229 
230         if (tps->dev->of_node)
231                 pdata = tps65217_parse_dt(pdev);
232 
233         if (!pdata) {
234                 dev_err(&pdev->dev, "Platform data not found\n");
235                 return -EINVAL;
236         }
237 
238         if (tps65217_chip_id(tps) != TPS65217) {
239                 dev_err(&pdev->dev, "Invalid tps chip version\n");
240                 return -ENODEV;
241         }
242 
243         platform_set_drvdata(pdev, tps);
244 
245         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
246                 /* Register the regulators */
247                 config.dev = tps->dev;
248                 config.init_data = pdata->tps65217_init_data[i];
249                 config.driver_data = tps;
250                 config.regmap = tps->regmap;
251                 if (tps->dev->of_node)
252                         config.of_node = pdata->of_node[i];
253 
254                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
255                                                &config);
256                 if (IS_ERR(rdev)) {
257                         dev_err(tps->dev, "failed to register %s regulator\n",
258                                 pdev->name);
259                         return PTR_ERR(rdev);
260                 }
261         }
262         return 0;
263 }
264 
265 static struct platform_driver tps65217_regulator_driver = {
266         .driver = {
267                 .name = "tps65217-pmic",
268         },
269         .probe = tps65217_regulator_probe,
270 };
271 
272 static int __init tps65217_regulator_init(void)
273 {
274         return platform_driver_register(&tps65217_regulator_driver);
275 }
276 subsys_initcall(tps65217_regulator_init);
277 
278 static void __exit tps65217_regulator_exit(void)
279 {
280         platform_driver_unregister(&tps65217_regulator_driver);
281 }
282 module_exit(tps65217_regulator_exit);
283 
284 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
285 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
286 MODULE_ALIAS("platform:tps65217-pmic");
287 MODULE_LICENSE("GPL v2");
288 

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