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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 };
138 
139 static const struct regulator_desc regulators[] = {
140         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, tps65217_pmic_ops, 64,
141                            TPS65217_REG_DEFDCDC1, TPS65217_DEFDCDCX_DCDC_MASK,
142                            TPS65217_ENABLE_DC1_EN, NULL, tps65217_uv1_ranges,
143                            2),  /* DCDC1 voltage range: 900000 ~ 1800000 */
144         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, tps65217_pmic_ops, 64,
145                            TPS65217_REG_DEFDCDC2, TPS65217_DEFDCDCX_DCDC_MASK,
146                            TPS65217_ENABLE_DC2_EN, NULL, tps65217_uv1_ranges,
147                            ARRAY_SIZE(tps65217_uv1_ranges)),
148         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, tps65217_pmic_ops, 64,
149                            TPS65217_REG_DEFDCDC3, TPS65217_DEFDCDCX_DCDC_MASK,
150                            TPS65217_ENABLE_DC3_EN, NULL, tps65217_uv1_ranges,
151                            1),  /* DCDC3 voltage range: 900000 ~ 1500000 */
152         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, tps65217_pmic_ldo1_ops, 16,
153                            TPS65217_REG_DEFLDO1, TPS65217_DEFLDO1_LDO1_MASK,
154                            TPS65217_ENABLE_LDO1_EN, LDO1_VSEL_table, NULL, 0),
155         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, tps65217_pmic_ops, 64,
156                            TPS65217_REG_DEFLDO2, TPS65217_DEFLDO2_LDO2_MASK,
157                            TPS65217_ENABLE_LDO2_EN, NULL, tps65217_uv1_ranges,
158                            ARRAY_SIZE(tps65217_uv1_ranges)),
159         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, tps65217_pmic_ops, 32,
160                            TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
161                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
162                            NULL, tps65217_uv2_ranges,
163                            ARRAY_SIZE(tps65217_uv2_ranges)),
164         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, tps65217_pmic_ops, 32,
165                            TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
166                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
167                            NULL, tps65217_uv2_ranges,
168                            ARRAY_SIZE(tps65217_uv2_ranges)),
169 };
170 
171 #ifdef CONFIG_OF
172 static struct of_regulator_match reg_matches[] = {
173         { .name = "dcdc1", .driver_data = (void *)TPS65217_DCDC_1 },
174         { .name = "dcdc2", .driver_data = (void *)TPS65217_DCDC_2 },
175         { .name = "dcdc3", .driver_data = (void *)TPS65217_DCDC_3 },
176         { .name = "ldo1", .driver_data = (void *)TPS65217_LDO_1 },
177         { .name = "ldo2", .driver_data = (void *)TPS65217_LDO_2 },
178         { .name = "ldo3", .driver_data = (void *)TPS65217_LDO_3 },
179         { .name = "ldo4", .driver_data = (void *)TPS65217_LDO_4 },
180 };
181 
182 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
183 {
184         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
185         struct device_node *node = tps->dev->of_node;
186         struct tps65217_board *pdata;
187         struct device_node *regs;
188         int i, count;
189 
190         regs = of_get_child_by_name(node, "regulators");
191         if (!regs)
192                 return NULL;
193 
194         count = of_regulator_match(&pdev->dev, regs, reg_matches,
195                                    TPS65217_NUM_REGULATOR);
196         of_node_put(regs);
197         if ((count < 0) || (count > TPS65217_NUM_REGULATOR))
198                 return NULL;
199 
200         pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
201         if (!pdata)
202                 return NULL;
203 
204         for (i = 0; i < count; i++) {
205                 if (!reg_matches[i].of_node)
206                         continue;
207 
208                 pdata->tps65217_init_data[i] = reg_matches[i].init_data;
209                 pdata->of_node[i] = reg_matches[i].of_node;
210         }
211 
212         return pdata;
213 }
214 #else
215 static struct tps65217_board *tps65217_parse_dt(struct platform_device *pdev)
216 {
217         return NULL;
218 }
219 #endif
220 
221 static int tps65217_regulator_probe(struct platform_device *pdev)
222 {
223         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
224         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
225         struct regulator_dev *rdev;
226         struct regulator_config config = { };
227         int i;
228 
229         if (tps->dev->of_node)
230                 pdata = tps65217_parse_dt(pdev);
231 
232         if (!pdata) {
233                 dev_err(&pdev->dev, "Platform data not found\n");
234                 return -EINVAL;
235         }
236 
237         if (tps65217_chip_id(tps) != TPS65217) {
238                 dev_err(&pdev->dev, "Invalid tps chip version\n");
239                 return -ENODEV;
240         }
241 
242         platform_set_drvdata(pdev, tps);
243 
244         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
245                 /* Register the regulators */
246                 config.dev = tps->dev;
247                 config.init_data = pdata->tps65217_init_data[i];
248                 config.driver_data = tps;
249                 config.regmap = tps->regmap;
250                 if (tps->dev->of_node)
251                         config.of_node = pdata->of_node[i];
252 
253                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
254                                                &config);
255                 if (IS_ERR(rdev)) {
256                         dev_err(tps->dev, "failed to register %s regulator\n",
257                                 pdev->name);
258                         return PTR_ERR(rdev);
259                 }
260 
261                 /* Save regulator for cleanup */
262                 tps->rdev[i] = rdev;
263         }
264         return 0;
265 }
266 
267 static struct platform_driver tps65217_regulator_driver = {
268         .driver = {
269                 .name = "tps65217-pmic",
270         },
271         .probe = tps65217_regulator_probe,
272 };
273 
274 static int __init tps65217_regulator_init(void)
275 {
276         return platform_driver_register(&tps65217_regulator_driver);
277 }
278 subsys_initcall(tps65217_regulator_init);
279 
280 static void __exit tps65217_regulator_exit(void)
281 {
282         platform_driver_unregister(&tps65217_regulator_driver);
283 }
284 module_exit(tps65217_regulator_exit);
285 
286 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
287 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
288 MODULE_ALIAS("platform:tps65217-pmic");
289 MODULE_LICENSE("GPL v2");
290 

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