2 * arizona-ldo1.c -- LDO1 supply for Arizona devices
4 * Copyright 2012 Wolfson Microelectronics PLC.
6 * Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
8 * This program is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by the
10 * Free Software Foundation; either version 2 of the License, or (at your
11 * option) any later version.
14 #include <linux/module.h>
15 #include <linux/moduleparam.h>
16 #include <linux/init.h>
17 #include <linux/bitops.h>
18 #include <linux/err.h>
20 #include <linux/of_gpio.h>
21 #include <linux/platform_device.h>
22 #include <linux/regulator/driver.h>
23 #include <linux/regulator/machine.h>
24 #include <linux/regulator/of_regulator.h>
25 #include <linux/gpio.h>
26 #include <linux/slab.h>
28 #include <linux/mfd/arizona/core.h>
29 #include <linux/mfd/arizona/pdata.h>
30 #include <linux/mfd/arizona/registers.h>
33 struct regulator_dev *regulator;
34 struct arizona *arizona;
36 struct regulator_consumer_supply supply;
37 struct regulator_init_data init_data;
40 static int arizona_ldo1_hc_list_voltage(struct regulator_dev *rdev,
41 unsigned int selector)
43 if (selector >= rdev->desc->n_voltages)
46 if (selector == rdev->desc->n_voltages - 1)
49 return rdev->desc->min_uV + (rdev->desc->uV_step * selector);
52 static int arizona_ldo1_hc_map_voltage(struct regulator_dev *rdev,
53 int min_uV, int max_uV)
57 sel = DIV_ROUND_UP(min_uV - rdev->desc->min_uV, rdev->desc->uV_step);
58 if (sel >= rdev->desc->n_voltages)
59 sel = rdev->desc->n_voltages - 1;
64 static int arizona_ldo1_hc_set_voltage_sel(struct regulator_dev *rdev,
67 struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
68 struct regmap *regmap = ldo->arizona->regmap;
72 if (sel == rdev->desc->n_voltages - 1)
73 val = ARIZONA_LDO1_HI_PWR;
77 ret = regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_2,
78 ARIZONA_LDO1_HI_PWR, val);
85 val = sel << ARIZONA_LDO1_VSEL_SHIFT;
87 return regmap_update_bits(regmap, ARIZONA_LDO1_CONTROL_1,
88 ARIZONA_LDO1_VSEL_MASK, val);
91 static int arizona_ldo1_hc_get_voltage_sel(struct regulator_dev *rdev)
93 struct arizona_ldo1 *ldo = rdev_get_drvdata(rdev);
94 struct regmap *regmap = ldo->arizona->regmap;
98 ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_2, &val);
102 if (val & ARIZONA_LDO1_HI_PWR)
103 return rdev->desc->n_voltages - 1;
105 ret = regmap_read(regmap, ARIZONA_LDO1_CONTROL_1, &val);
109 return (val & ARIZONA_LDO1_VSEL_MASK) >> ARIZONA_LDO1_VSEL_SHIFT;
112 static struct regulator_ops arizona_ldo1_hc_ops = {
113 .list_voltage = arizona_ldo1_hc_list_voltage,
114 .map_voltage = arizona_ldo1_hc_map_voltage,
115 .get_voltage_sel = arizona_ldo1_hc_get_voltage_sel,
116 .set_voltage_sel = arizona_ldo1_hc_set_voltage_sel,
117 .get_bypass = regulator_get_bypass_regmap,
118 .set_bypass = regulator_set_bypass_regmap,
121 static const struct regulator_desc arizona_ldo1_hc = {
123 .supply_name = "LDOVDD",
124 .type = REGULATOR_VOLTAGE,
125 .ops = &arizona_ldo1_hc_ops,
127 .bypass_reg = ARIZONA_LDO1_CONTROL_1,
128 .bypass_mask = ARIZONA_LDO1_BYPASS,
134 .owner = THIS_MODULE,
137 static struct regulator_ops arizona_ldo1_ops = {
138 .list_voltage = regulator_list_voltage_linear,
139 .map_voltage = regulator_map_voltage_linear,
140 .get_voltage_sel = regulator_get_voltage_sel_regmap,
141 .set_voltage_sel = regulator_set_voltage_sel_regmap,
144 static const struct regulator_desc arizona_ldo1 = {
146 .supply_name = "LDOVDD",
147 .type = REGULATOR_VOLTAGE,
148 .ops = &arizona_ldo1_ops,
150 .vsel_reg = ARIZONA_LDO1_CONTROL_1,
151 .vsel_mask = ARIZONA_LDO1_VSEL_MASK,
157 .owner = THIS_MODULE,
160 static const struct regulator_init_data arizona_ldo1_dvfs = {
164 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
165 REGULATOR_CHANGE_VOLTAGE,
167 .num_consumer_supplies = 1,
170 static const struct regulator_init_data arizona_ldo1_default = {
172 .valid_ops_mask = REGULATOR_CHANGE_STATUS,
174 .num_consumer_supplies = 1,
177 static const struct regulator_init_data arizona_ldo1_wm5110 = {
181 .valid_ops_mask = REGULATOR_CHANGE_STATUS |
182 REGULATOR_CHANGE_VOLTAGE,
184 .num_consumer_supplies = 1,
187 static int arizona_ldo1_of_get_pdata(struct arizona *arizona,
188 struct regulator_config *config,
189 const struct regulator_desc *desc)
191 struct arizona_pdata *pdata = &arizona->pdata;
192 struct arizona_ldo1 *ldo1 = config->driver_data;
193 struct device_node *np = arizona->dev->of_node;
194 struct device_node *init_node, *dcvdd_node;
195 struct regulator_init_data *init_data;
197 pdata->ldoena = of_get_named_gpio(np, "wlf,ldoena", 0);
198 if (pdata->ldoena < 0) {
199 dev_warn(arizona->dev,
200 "LDOENA GPIO property missing/malformed: %d\n",
204 config->ena_gpio_initialized = true;
207 init_node = of_get_child_by_name(np, "ldo1");
208 dcvdd_node = of_parse_phandle(np, "DCVDD-supply", 0);
211 config->of_node = init_node;
213 init_data = of_get_regulator_init_data(arizona->dev, init_node,
217 init_data->consumer_supplies = &ldo1->supply;
218 init_data->num_consumer_supplies = 1;
220 if (dcvdd_node && dcvdd_node != init_node)
221 arizona->external_dcvdd = true;
223 pdata->ldo1 = init_data;
225 } else if (dcvdd_node) {
226 arizona->external_dcvdd = true;
229 of_node_put(dcvdd_node);
234 static int arizona_ldo1_probe(struct platform_device *pdev)
236 struct arizona *arizona = dev_get_drvdata(pdev->dev.parent);
237 const struct regulator_desc *desc;
238 struct regulator_config config = { };
239 struct arizona_ldo1 *ldo1;
242 arizona->external_dcvdd = false;
244 ldo1 = devm_kzalloc(&pdev->dev, sizeof(*ldo1), GFP_KERNEL);
248 ldo1->arizona = arizona;
251 * Since the chip usually supplies itself we provide some
252 * default init_data for it. This will be overridden with
253 * platform data if provided.
255 switch (arizona->type) {
260 desc = &arizona_ldo1_hc;
261 ldo1->init_data = arizona_ldo1_dvfs;
265 desc = &arizona_ldo1;
266 ldo1->init_data = arizona_ldo1_wm5110;
269 desc = &arizona_ldo1;
270 ldo1->init_data = arizona_ldo1_default;
274 ldo1->init_data.consumer_supplies = &ldo1->supply;
275 ldo1->supply.supply = "DCVDD";
276 ldo1->supply.dev_name = dev_name(arizona->dev);
278 config.dev = arizona->dev;
279 config.driver_data = ldo1;
280 config.regmap = arizona->regmap;
282 if (IS_ENABLED(CONFIG_OF)) {
283 if (!dev_get_platdata(arizona->dev)) {
284 ret = arizona_ldo1_of_get_pdata(arizona, &config, desc);
290 config.ena_gpio = arizona->pdata.ldoena;
292 if (arizona->pdata.ldo1)
293 config.init_data = arizona->pdata.ldo1;
295 config.init_data = &ldo1->init_data;
298 * LDO1 can only be used to supply DCVDD so if it has no
299 * consumers then DCVDD is supplied externally.
301 if (config.init_data->num_consumer_supplies == 0)
302 arizona->external_dcvdd = true;
304 ldo1->regulator = devm_regulator_register(&pdev->dev, desc, &config);
306 of_node_put(config.of_node);
308 if (IS_ERR(ldo1->regulator)) {
309 ret = PTR_ERR(ldo1->regulator);
310 dev_err(arizona->dev, "Failed to register LDO1 supply: %d\n",
315 platform_set_drvdata(pdev, ldo1);
320 static struct platform_driver arizona_ldo1_driver = {
321 .probe = arizona_ldo1_probe,
323 .name = "arizona-ldo1",
327 module_platform_driver(arizona_ldo1_driver);
329 /* Module information */
330 MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
331 MODULE_DESCRIPTION("Arizona LDO1 driver");
332 MODULE_LICENSE("GPL");
333 MODULE_ALIAS("platform:arizona-ldo1");