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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, _of_match, _ops, _n, _vr, _vm, _em, \
 31                            _t, _lr, _nlr,  _sr, _sm)    \
 32         {                                               \
 33                 .name           = _name,                \
 34                 .id             = _id,                  \
 35                 .of_match       = of_match_ptr(_of_match),    \
 36                 .regulators_node= of_match_ptr("regulators"), \
 37                 .ops            = &_ops,                \
 38                 .n_voltages     = _n,                   \
 39                 .type           = REGULATOR_VOLTAGE,    \
 40                 .owner          = THIS_MODULE,          \
 41                 .vsel_reg       = _vr,                  \
 42                 .vsel_mask      = _vm,                  \
 43                 .enable_reg     = TPS65217_REG_ENABLE,  \
 44                 .enable_mask    = _em,                  \
 45                 .volt_table     = _t,                   \
 46                 .linear_ranges  = _lr,                  \
 47                 .n_linear_ranges = _nlr,                \
 48                 .bypass_reg     = _sr,                  \
 49                 .bypass_mask    = _sm,                  \
 50         }                                               \
 51 
 52 static const unsigned int LDO1_VSEL_table[] = {
 53         1000000, 1100000, 1200000, 1250000,
 54         1300000, 1350000, 1400000, 1500000,
 55         1600000, 1800000, 2500000, 2750000,
 56         2800000, 3000000, 3100000, 3300000,
 57 };
 58 
 59 static const struct regulator_linear_range tps65217_uv1_ranges[] = {
 60         REGULATOR_LINEAR_RANGE(900000, 0, 24, 25000),
 61         REGULATOR_LINEAR_RANGE(1550000, 25, 30, 50000),
 62         REGULATOR_LINEAR_RANGE(1850000, 31, 52, 50000),
 63         REGULATOR_LINEAR_RANGE(3000000, 53, 55, 100000),
 64         REGULATOR_LINEAR_RANGE(3300000, 56, 62, 0),
 65 };
 66 
 67 static const struct regulator_linear_range tps65217_uv2_ranges[] = {
 68         REGULATOR_LINEAR_RANGE(1500000, 0, 8, 50000),
 69         REGULATOR_LINEAR_RANGE(2000000, 9, 13, 100000),
 70         REGULATOR_LINEAR_RANGE(2450000, 14, 31, 50000),
 71 };
 72 
 73 static int tps65217_pmic_enable(struct regulator_dev *dev)
 74 {
 75         struct tps65217 *tps = rdev_get_drvdata(dev);
 76         int rid = rdev_get_id(dev);
 77 
 78         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 79                 return -EINVAL;
 80 
 81         /* Enable the regulator and password protection is level 1 */
 82         return tps65217_set_bits(tps, TPS65217_REG_ENABLE,
 83                                  dev->desc->enable_mask, dev->desc->enable_mask,
 84                                  TPS65217_PROTECT_L1);
 85 }
 86 
 87 static int tps65217_pmic_disable(struct regulator_dev *dev)
 88 {
 89         struct tps65217 *tps = rdev_get_drvdata(dev);
 90         int rid = rdev_get_id(dev);
 91 
 92         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
 93                 return -EINVAL;
 94 
 95         /* Disable the regulator and password protection is level 1 */
 96         return tps65217_clear_bits(tps, TPS65217_REG_ENABLE,
 97                                    dev->desc->enable_mask, TPS65217_PROTECT_L1);
 98 }
 99 
100 static int tps65217_pmic_set_voltage_sel(struct regulator_dev *dev,
101                                          unsigned selector)
102 {
103         int ret;
104         struct tps65217 *tps = rdev_get_drvdata(dev);
105         unsigned int rid = rdev_get_id(dev);
106 
107         /* Set the voltage based on vsel value and write protect level is 2 */
108         ret = tps65217_set_bits(tps, dev->desc->vsel_reg, dev->desc->vsel_mask,
109                                 selector, TPS65217_PROTECT_L2);
110 
111         /* Set GO bit for DCDCx to initiate voltage transistion */
112         switch (rid) {
113         case TPS65217_DCDC_1 ... TPS65217_DCDC_3:
114                 ret = tps65217_set_bits(tps, TPS65217_REG_DEFSLEW,
115                                        TPS65217_DEFSLEW_GO, TPS65217_DEFSLEW_GO,
116                                        TPS65217_PROTECT_L2);
117                 break;
118         }
119 
120         return ret;
121 }
122 
123 static int tps65217_pmic_set_suspend_enable(struct regulator_dev *dev)
124 {
125         struct tps65217 *tps = rdev_get_drvdata(dev);
126         unsigned int rid = rdev_get_id(dev);
127 
128         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
129                 return -EINVAL;
130 
131         return tps65217_clear_bits(tps, dev->desc->bypass_reg,
132                                    dev->desc->bypass_mask,
133                                    TPS65217_PROTECT_L1);
134 }
135 
136 static int tps65217_pmic_set_suspend_disable(struct regulator_dev *dev)
137 {
138         struct tps65217 *tps = rdev_get_drvdata(dev);
139         unsigned int rid = rdev_get_id(dev);
140 
141         if (rid < TPS65217_DCDC_1 || rid > TPS65217_LDO_4)
142                 return -EINVAL;
143 
144         if (!tps->strobes[rid])
145                 return -EINVAL;
146 
147         return tps65217_set_bits(tps, dev->desc->bypass_reg,
148                                  dev->desc->bypass_mask,
149                                  tps->strobes[rid], TPS65217_PROTECT_L1);
150 }
151 
152 /* Operations permitted on DCDCx, LDO2, LDO3 and LDO4 */
153 static struct regulator_ops tps65217_pmic_ops = {
154         .is_enabled             = regulator_is_enabled_regmap,
155         .enable                 = tps65217_pmic_enable,
156         .disable                = tps65217_pmic_disable,
157         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
158         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
159         .list_voltage           = regulator_list_voltage_linear_range,
160         .map_voltage            = regulator_map_voltage_linear_range,
161         .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
162         .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
163 };
164 
165 /* Operations permitted on LDO1 */
166 static struct regulator_ops tps65217_pmic_ldo1_ops = {
167         .is_enabled             = regulator_is_enabled_regmap,
168         .enable                 = tps65217_pmic_enable,
169         .disable                = tps65217_pmic_disable,
170         .get_voltage_sel        = regulator_get_voltage_sel_regmap,
171         .set_voltage_sel        = tps65217_pmic_set_voltage_sel,
172         .list_voltage           = regulator_list_voltage_table,
173         .map_voltage            = regulator_map_voltage_ascend,
174         .set_suspend_enable     = tps65217_pmic_set_suspend_enable,
175         .set_suspend_disable    = tps65217_pmic_set_suspend_disable,
176 };
177 
178 static const struct regulator_desc regulators[] = {
179         TPS65217_REGULATOR("DCDC1", TPS65217_DCDC_1, "dcdc1",
180                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC1,
181                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC1_EN,
182                            NULL, tps65217_uv1_ranges, 2, TPS65217_REG_SEQ1,
183                            TPS65217_SEQ1_DC1_SEQ_MASK),
184         TPS65217_REGULATOR("DCDC2", TPS65217_DCDC_2, "dcdc2",
185                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC2,
186                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC2_EN,
187                            NULL, tps65217_uv1_ranges,
188                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ1,
189                            TPS65217_SEQ1_DC2_SEQ_MASK),
190         TPS65217_REGULATOR("DCDC3", TPS65217_DCDC_3, "dcdc3",
191                            tps65217_pmic_ops, 64, TPS65217_REG_DEFDCDC3,
192                            TPS65217_DEFDCDCX_DCDC_MASK, TPS65217_ENABLE_DC3_EN,
193                            NULL, tps65217_uv1_ranges, 1, TPS65217_REG_SEQ2,
194                            TPS65217_SEQ2_DC3_SEQ_MASK),
195         TPS65217_REGULATOR("LDO1", TPS65217_LDO_1, "ldo1",
196                            tps65217_pmic_ldo1_ops, 16, TPS65217_REG_DEFLDO1,
197                            TPS65217_DEFLDO1_LDO1_MASK, TPS65217_ENABLE_LDO1_EN,
198                            LDO1_VSEL_table, NULL, 0, TPS65217_REG_SEQ2,
199                            TPS65217_SEQ2_LDO1_SEQ_MASK),
200         TPS65217_REGULATOR("LDO2", TPS65217_LDO_2, "ldo2", tps65217_pmic_ops,
201                            64, TPS65217_REG_DEFLDO2,
202                            TPS65217_DEFLDO2_LDO2_MASK, TPS65217_ENABLE_LDO2_EN,
203                            NULL, tps65217_uv1_ranges,
204                            ARRAY_SIZE(tps65217_uv1_ranges), TPS65217_REG_SEQ3,
205                            TPS65217_SEQ3_LDO2_SEQ_MASK),
206         TPS65217_REGULATOR("LDO3", TPS65217_LDO_3, "ldo3", tps65217_pmic_ops,
207                            32, TPS65217_REG_DEFLS1, TPS65217_DEFLDO3_LDO3_MASK,
208                            TPS65217_ENABLE_LS1_EN | TPS65217_DEFLDO3_LDO3_EN,
209                            NULL, tps65217_uv2_ranges,
210                            ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ3,
211                            TPS65217_SEQ3_LDO3_SEQ_MASK),
212         TPS65217_REGULATOR("LDO4", TPS65217_LDO_4, "ldo4", tps65217_pmic_ops,
213                            32, TPS65217_REG_DEFLS2, TPS65217_DEFLDO4_LDO4_MASK,
214                            TPS65217_ENABLE_LS2_EN | TPS65217_DEFLDO4_LDO4_EN,
215                            NULL, tps65217_uv2_ranges,
216                            ARRAY_SIZE(tps65217_uv2_ranges), TPS65217_REG_SEQ4,
217                            TPS65217_SEQ4_LDO4_SEQ_MASK),
218 };
219 
220 static int tps65217_regulator_probe(struct platform_device *pdev)
221 {
222         struct tps65217 *tps = dev_get_drvdata(pdev->dev.parent);
223         struct tps65217_board *pdata = dev_get_platdata(tps->dev);
224         struct regulator_dev *rdev;
225         struct regulator_config config = { };
226         int i, ret;
227         unsigned int val;
228 
229         if (tps65217_chip_id(tps) != TPS65217) {
230                 dev_err(&pdev->dev, "Invalid tps chip version\n");
231                 return -ENODEV;
232         }
233 
234         /* Allocate memory for strobes */
235         tps->strobes = devm_kzalloc(&pdev->dev, sizeof(u8) *
236                                     TPS65217_NUM_REGULATOR, GFP_KERNEL);
237 
238         platform_set_drvdata(pdev, tps);
239 
240         for (i = 0; i < TPS65217_NUM_REGULATOR; i++) {
241                 /* Register the regulators */
242                 config.dev = tps->dev;
243                 if (pdata)
244                         config.init_data = pdata->tps65217_init_data[i];
245                 config.driver_data = tps;
246                 config.regmap = tps->regmap;
247 
248                 rdev = devm_regulator_register(&pdev->dev, &regulators[i],
249                                                &config);
250                 if (IS_ERR(rdev)) {
251                         dev_err(tps->dev, "failed to register %s regulator\n",
252                                 pdev->name);
253                         return PTR_ERR(rdev);
254                 }
255 
256                 /* Store default strobe info */
257                 ret = tps65217_reg_read(tps, regulators[i].bypass_reg, &val);
258                 tps->strobes[i] = val & regulators[i].bypass_mask;
259         }
260 
261         return 0;
262 }
263 
264 static struct platform_driver tps65217_regulator_driver = {
265         .driver = {
266                 .name = "tps65217-pmic",
267         },
268         .probe = tps65217_regulator_probe,
269 };
270 
271 static int __init tps65217_regulator_init(void)
272 {
273         return platform_driver_register(&tps65217_regulator_driver);
274 }
275 subsys_initcall(tps65217_regulator_init);
276 
277 static void __exit tps65217_regulator_exit(void)
278 {
279         platform_driver_unregister(&tps65217_regulator_driver);
280 }
281 module_exit(tps65217_regulator_exit);
282 
283 MODULE_AUTHOR("AnilKumar Ch <anilkumar@ti.com>");
284 MODULE_DESCRIPTION("TPS65217 voltage regulator driver");
285 MODULE_ALIAS("platform:tps65217-pmic");
286 MODULE_LICENSE("GPL v2");
287 

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