Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 1 | /* |
| 2 | * Regulator driver for RICOH RC5T583 power management chip. |
| 3 | * |
| 4 | * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. |
| 5 | * Author: Laxman dewangan <ldewangan@nvidia.com> |
| 6 | * |
| 7 | * based on code |
| 8 | * Copyright (C) 2011 RICOH COMPANY,LTD |
| 9 | * |
| 10 | * |
| 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. |
| 14 | * |
| 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 |
| 18 | * more details. |
| 19 | * |
| 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/>. |
| 22 | * |
| 23 | */ |
| 24 | |
| 25 | #include <linux/module.h> |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 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> |
| 34 | |
| 35 | struct rc5t583_regulator_info { |
| 36 | int deepsleep_id; |
| 37 | |
| 38 | /* Regulator register address.*/ |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 39 | uint8_t reg_disc_reg; |
| 40 | uint8_t disc_bit; |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 41 | uint8_t deepsleep_reg; |
| 42 | |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 43 | /* Regulator specific turn-on delay and voltage settling time*/ |
| 44 | int enable_uv_per_us; |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 45 | |
| 46 | /* Used by regulator core */ |
| 47 | struct regulator_desc desc; |
| 48 | }; |
| 49 | |
| 50 | struct rc5t583_regulator { |
| 51 | struct rc5t583_regulator_info *reg_info; |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 52 | struct regulator_dev *rdev; |
| 53 | }; |
| 54 | |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 55 | static int rc5t583_regulator_enable_time(struct regulator_dev *rdev) |
| 56 | { |
| 57 | struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); |
Axel Lin | 15b397d7 | 2012-04-24 09:56:43 +0800 | [diff] [blame] | 58 | int vsel = regulator_get_voltage_sel_regmap(rdev); |
Axel Lin | 3209be1 | 2012-05-14 10:54:46 +0800 | [diff] [blame] | 59 | int curr_uV = regulator_list_voltage_linear(rdev, vsel); |
Axel Lin | 15b397d7 | 2012-04-24 09:56:43 +0800 | [diff] [blame] | 60 | |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 61 | return DIV_ROUND_UP(curr_uV, reg->reg_info->enable_uv_per_us); |
| 62 | } |
| 63 | |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 64 | static struct regulator_ops rc5t583_ops = { |
Axel Lin | 5bb6936 | 2012-04-17 14:11:31 +0800 | [diff] [blame] | 65 | .is_enabled = regulator_is_enabled_regmap, |
| 66 | .enable = regulator_enable_regmap, |
| 67 | .disable = regulator_disable_regmap, |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 68 | .enable_time = rc5t583_regulator_enable_time, |
Axel Lin | 15b397d7 | 2012-04-24 09:56:43 +0800 | [diff] [blame] | 69 | .get_voltage_sel = regulator_get_voltage_sel_regmap, |
Axel Lin | 70e5f64 | 2012-05-14 10:55:50 +0800 | [diff] [blame] | 70 | .set_voltage_sel = regulator_set_voltage_sel_regmap, |
Axel Lin | 3209be1 | 2012-05-14 10:54:46 +0800 | [diff] [blame] | 71 | .list_voltage = regulator_list_voltage_linear, |
Axel Lin | 70e5f64 | 2012-05-14 10:55:50 +0800 | [diff] [blame] | 72 | .map_voltage = regulator_map_voltage_linear, |
Axel Lin | 2f6ae6e | 2012-06-19 09:26:52 +0800 | [diff] [blame] | 73 | .set_voltage_time_sel = regulator_set_voltage_time_sel, |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 74 | }; |
| 75 | |
Axel Lin | 95e301b | 2012-04-06 08:01:36 +0800 | [diff] [blame] | 76 | #define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \ |
| 77 | _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \ |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 78 | { \ |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 79 | .reg_disc_reg = RC5T583_REG_##_disc_reg, \ |
| 80 | .disc_bit = _disc_bit, \ |
Axel Lin | 95e301b | 2012-04-06 08:01:36 +0800 | [diff] [blame] | 81 | .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \ |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 82 | .enable_uv_per_us = _enable_mv * 1000, \ |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 83 | .deepsleep_id = RC5T583_DS_##_id, \ |
| 84 | .desc = { \ |
| 85 | .name = "rc5t583-regulator-"#_id, \ |
| 86 | .id = RC5T583_REGULATOR_##_id, \ |
Axel Lin | e3a7384 | 2012-04-05 14:04:48 +0800 | [diff] [blame] | 87 | .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \ |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 88 | .ops = &rc5t583_ops, \ |
| 89 | .type = REGULATOR_VOLTAGE, \ |
| 90 | .owner = THIS_MODULE, \ |
Axel Lin | 15b397d7 | 2012-04-24 09:56:43 +0800 | [diff] [blame] | 91 | .vsel_reg = RC5T583_REG_##_id##DAC, \ |
| 92 | .vsel_mask = _vout_mask, \ |
Axel Lin | 5bb6936 | 2012-04-17 14:11:31 +0800 | [diff] [blame] | 93 | .enable_reg = RC5T583_REG_##_en_reg, \ |
| 94 | .enable_mask = BIT(_en_bit), \ |
Axel Lin | 3209be1 | 2012-05-14 10:54:46 +0800 | [diff] [blame] | 95 | .min_uV = _min_mv * 1000, \ |
| 96 | .uV_step = _step_uV, \ |
Axel Lin | 2f6ae6e | 2012-06-19 09:26:52 +0800 | [diff] [blame] | 97 | .ramp_delay = 40 * 1000, \ |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 98 | }, \ |
| 99 | } |
| 100 | |
| 101 | static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = { |
Axel Lin | 95e301b | 2012-04-06 08:01:36 +0800 | [diff] [blame] | 102 | RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4), |
| 103 | RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14), |
| 104 | RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14), |
| 105 | RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14), |
| 106 | RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160), |
| 107 | RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160), |
| 108 | RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160), |
| 109 | RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160), |
| 110 | RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133), |
| 111 | RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267), |
| 112 | RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133), |
| 113 | RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233), |
| 114 | RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233), |
| 115 | RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133), |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 116 | }; |
| 117 | |
Bill Pemberton | a502357 | 2012-11-19 13:22:22 -0500 | [diff] [blame] | 118 | static int rc5t583_regulator_probe(struct platform_device *pdev) |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 119 | { |
| 120 | struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent); |
| 121 | struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev); |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 122 | struct regulator_config config = { }; |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 123 | struct rc5t583_regulator *reg = NULL; |
| 124 | struct rc5t583_regulator *regs; |
| 125 | struct regulator_dev *rdev; |
| 126 | struct rc5t583_regulator_info *ri; |
| 127 | int ret; |
| 128 | int id; |
| 129 | |
| 130 | if (!pdata) { |
| 131 | dev_err(&pdev->dev, "No platform data, exiting...\n"); |
| 132 | return -ENODEV; |
| 133 | } |
| 134 | |
| 135 | regs = devm_kzalloc(&pdev->dev, RC5T583_REGULATOR_MAX * |
| 136 | sizeof(struct rc5t583_regulator), GFP_KERNEL); |
Sachin Kamat | 2ea2583 | 2014-02-20 14:23:10 +0530 | [diff] [blame] | 137 | if (!regs) |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 138 | return -ENOMEM; |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 139 | |
| 140 | |
| 141 | for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) { |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 142 | reg = ®s[id]; |
| 143 | ri = &rc5t583_reg_info[id]; |
| 144 | reg->reg_info = ri; |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 145 | |
| 146 | if (ri->deepsleep_id == RC5T583_DS_NONE) |
| 147 | goto skip_ext_pwr_config; |
| 148 | |
| 149 | ret = rc5t583_ext_power_req_config(rc5t583->dev, |
| 150 | ri->deepsleep_id, |
| 151 | pdata->regulator_ext_pwr_control[id], |
| 152 | pdata->regulator_deepsleep_slot[id]); |
| 153 | /* |
| 154 | * Configuring external control is not a major issue, |
| 155 | * just give warning. |
| 156 | */ |
| 157 | if (ret < 0) |
| 158 | dev_warn(&pdev->dev, |
| 159 | "Failed to configure ext control %d\n", id); |
| 160 | |
| 161 | skip_ext_pwr_config: |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 162 | config.dev = &pdev->dev; |
Axel Lin | 3f24bf7 | 2014-02-06 14:49:11 +0800 | [diff] [blame] | 163 | config.init_data = pdata->reg_init_data[id]; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 164 | config.driver_data = reg; |
Axel Lin | 5bb6936 | 2012-04-17 14:11:31 +0800 | [diff] [blame] | 165 | config.regmap = rc5t583->regmap; |
Mark Brown | c172708 | 2012-04-04 00:50:22 +0100 | [diff] [blame] | 166 | |
Sachin Kamat | 1377530 | 2013-09-04 12:01:02 +0530 | [diff] [blame] | 167 | rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config); |
Axel Lin | a69df8a | 2012-04-04 19:52:35 +0800 | [diff] [blame] | 168 | if (IS_ERR(rdev)) { |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 169 | dev_err(&pdev->dev, "Failed to register regulator %s\n", |
| 170 | ri->desc.name); |
Sachin Kamat | 1377530 | 2013-09-04 12:01:02 +0530 | [diff] [blame] | 171 | return PTR_ERR(rdev); |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 172 | } |
| 173 | reg->rdev = rdev; |
| 174 | } |
| 175 | platform_set_drvdata(pdev, regs); |
| 176 | return 0; |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 177 | } |
| 178 | |
| 179 | static struct platform_driver rc5t583_regulator_driver = { |
| 180 | .driver = { |
| 181 | .name = "rc5t583-regulator", |
| 182 | .owner = THIS_MODULE, |
| 183 | }, |
| 184 | .probe = rc5t583_regulator_probe, |
Laxman Dewangan | 6ffc327 | 2012-04-04 12:44:00 +0530 | [diff] [blame] | 185 | }; |
| 186 | |
| 187 | static int __init rc5t583_regulator_init(void) |
| 188 | { |
| 189 | return platform_driver_register(&rc5t583_regulator_driver); |
| 190 | } |
| 191 | subsys_initcall(rc5t583_regulator_init); |
| 192 | |
| 193 | static void __exit rc5t583_regulator_exit(void) |
| 194 | { |
| 195 | platform_driver_unregister(&rc5t583_regulator_driver); |
| 196 | } |
| 197 | module_exit(rc5t583_regulator_exit); |
| 198 | |
| 199 | MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); |
| 200 | MODULE_DESCRIPTION("RC5T583 regulator driver"); |
| 201 | MODULE_ALIAS("platform:rc5t583-regulator"); |
Laxman Dewangan | 4eb0645 | 2012-04-06 10:58:33 +0530 | [diff] [blame] | 202 | MODULE_LICENSE("GPL v2"); |