2 * Regulator driver for RICOH RC5T583 power management chip.
4 * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved.
5 * Author: Laxman dewangan <ldewangan@nvidia.com>
8 * Copyright (C) 2011 RICOH COMPANY,LTD
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms and conditions of the GNU General Public License,
13 * version 2, as published by the Free Software Foundation.
15 * This program is distributed in the hope it will be useful, but WITHOUT
16 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
17 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
20 * You should have received a copy of the GNU General Public License
21 * along with this program. If not, see <http://www.gnu.org/licenses/>.
25 #include <linux/module.h>
26 #include <linux/init.h>
27 #include <linux/slab.h>
28 #include <linux/err.h>
29 #include <linux/platform_device.h>
30 #include <linux/regulator/driver.h>
31 #include <linux/regulator/machine.h>
32 #include <linux/gpio.h>
33 #include <linux/mfd/rc5t583.h>
35 struct rc5t583_regulator_info {
38 /* Regulator register address.*/
41 uint8_t deepsleep_reg;
43 /* Regulator specific turn-on delay and voltage settling time*/
46 /* Used by regulator core */
47 struct regulator_desc desc;
50 static int rc5t583_regulator_enable_time(struct regulator_dev *rdev)
52 struct rc5t583_regulator_info *reg_info = rdev_get_drvdata(rdev);
53 int vsel = regulator_get_voltage_sel_regmap(rdev);
54 int curr_uV = regulator_list_voltage_linear(rdev, vsel);
56 return DIV_ROUND_UP(curr_uV, reg_info->enable_uv_per_us);
59 static const struct regulator_ops rc5t583_ops = {
60 .is_enabled = regulator_is_enabled_regmap,
61 .enable = regulator_enable_regmap,
62 .disable = regulator_disable_regmap,
63 .enable_time = rc5t583_regulator_enable_time,
64 .get_voltage_sel = regulator_get_voltage_sel_regmap,
65 .set_voltage_sel = regulator_set_voltage_sel_regmap,
66 .list_voltage = regulator_list_voltage_linear,
67 .map_voltage = regulator_map_voltage_linear,
68 .set_voltage_time_sel = regulator_set_voltage_time_sel,
71 #define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \
72 _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \
74 .reg_disc_reg = RC5T583_REG_##_disc_reg, \
75 .disc_bit = _disc_bit, \
76 .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \
77 .enable_uv_per_us = _enable_mv * 1000, \
78 .deepsleep_id = RC5T583_DS_##_id, \
80 .name = "rc5t583-regulator-"#_id, \
81 .id = RC5T583_REGULATOR_##_id, \
82 .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \
83 .ops = &rc5t583_ops, \
84 .type = REGULATOR_VOLTAGE, \
85 .owner = THIS_MODULE, \
86 .vsel_reg = RC5T583_REG_##_id##DAC, \
87 .vsel_mask = _vout_mask, \
88 .enable_reg = RC5T583_REG_##_en_reg, \
89 .enable_mask = BIT(_en_bit), \
90 .min_uV = _min_mv * 1000, \
91 .uV_step = _step_uV, \
92 .ramp_delay = 40 * 1000, \
96 static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = {
97 RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4),
98 RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14),
99 RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14),
100 RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14),
101 RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160),
102 RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160),
103 RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160),
104 RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160),
105 RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133),
106 RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267),
107 RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133),
108 RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233),
109 RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233),
110 RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133),
113 static int rc5t583_regulator_probe(struct platform_device *pdev)
115 struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent);
116 struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev);
117 struct regulator_config config = { };
118 struct regulator_dev *rdev;
119 struct rc5t583_regulator_info *ri;
124 dev_err(&pdev->dev, "No platform data, exiting...\n");
128 for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) {
129 ri = &rc5t583_reg_info[id];
131 if (ri->deepsleep_id == RC5T583_DS_NONE)
132 goto skip_ext_pwr_config;
134 ret = rc5t583_ext_power_req_config(rc5t583->dev,
136 pdata->regulator_ext_pwr_control[id],
137 pdata->regulator_deepsleep_slot[id]);
139 * Configuring external control is not a major issue,
144 "Failed to configure ext control %d\n", id);
147 config.dev = &pdev->dev;
148 config.init_data = pdata->reg_init_data[id];
149 config.driver_data = ri;
150 config.regmap = rc5t583->regmap;
152 rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
154 dev_err(&pdev->dev, "Failed to register regulator %s\n",
156 return PTR_ERR(rdev);
162 static struct platform_driver rc5t583_regulator_driver = {
164 .name = "rc5t583-regulator",
166 .probe = rc5t583_regulator_probe,
169 static int __init rc5t583_regulator_init(void)
171 return platform_driver_register(&rc5t583_regulator_driver);
173 subsys_initcall(rc5t583_regulator_init);
175 static void __exit rc5t583_regulator_exit(void)
177 platform_driver_unregister(&rc5t583_regulator_driver);
179 module_exit(rc5t583_regulator_exit);
181 MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>");
182 MODULE_DESCRIPTION("RC5T583 regulator driver");
183 MODULE_ALIAS("platform:rc5t583-regulator");
184 MODULE_LICENSE("GPL v2");