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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 | /* * Regulator driver for RICOH RC5T583 power management chip. * * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. * Author: Laxman dewangan <ldewangan@nvidia.com> * * based on code * Copyright (C) 2011 RICOH COMPANY,LTD * * * This program is free software; you can redistribute it and/or modify it * under the terms and conditions of the GNU General Public License, * version 2, as published by the Free Software Foundation. * * This program is distributed in the hope it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for * more details. * * You should have received a copy of the GNU General Public License * along with this program. If not, see <http://www.gnu.org/licenses/>. * */ #include <linux/module.h> #include <linux/init.h> #include <linux/slab.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/gpio.h> #include <linux/mfd/rc5t583.h> struct rc5t583_regulator_info { int deepsleep_id; /* Regulator register address.*/ uint8_t reg_disc_reg; uint8_t disc_bit; uint8_t deepsleep_reg; /* Regulator specific turn-on delay and voltage settling time*/ int enable_uv_per_us; /* Used by regulator core */ struct regulator_desc desc; }; struct rc5t583_regulator { struct rc5t583_regulator_info *reg_info; struct regulator_dev *rdev; }; static int rc5t583_regulator_enable_time(struct regulator_dev *rdev) { struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); int vsel = regulator_get_voltage_sel_regmap(rdev); int curr_uV = regulator_list_voltage_linear(rdev, vsel); return DIV_ROUND_UP(curr_uV, reg->reg_info->enable_uv_per_us); } static struct regulator_ops rc5t583_ops = { .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .enable_time = rc5t583_regulator_enable_time, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .set_voltage_time_sel = regulator_set_voltage_time_sel, }; #define RC5T583_REG(_id, _en_reg, _en_bit, _disc_reg, _disc_bit, \ _vout_mask, _min_mv, _max_mv, _step_uV, _enable_mv) \ { \ .reg_disc_reg = RC5T583_REG_##_disc_reg, \ .disc_bit = _disc_bit, \ .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \ .enable_uv_per_us = _enable_mv * 1000, \ .deepsleep_id = RC5T583_DS_##_id, \ .desc = { \ .name = "rc5t583-regulator-"#_id, \ .id = RC5T583_REGULATOR_##_id, \ .n_voltages = (_max_mv - _min_mv) * 1000 / _step_uV + 1, \ .ops = &rc5t583_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .vsel_reg = RC5T583_REG_##_id##DAC, \ .vsel_mask = _vout_mask, \ .enable_reg = RC5T583_REG_##_en_reg, \ .enable_mask = BIT(_en_bit), \ .min_uV = _min_mv * 1000, \ .uV_step = _step_uV, \ .ramp_delay = 40 * 1000, \ }, \ } static struct rc5t583_regulator_info rc5t583_reg_info[RC5T583_REGULATOR_MAX] = { RC5T583_REG(DC0, DC0CTL, 0, DC0CTL, 1, 0x7F, 700, 1500, 12500, 4), RC5T583_REG(DC1, DC1CTL, 0, DC1CTL, 1, 0x7F, 700, 1500, 12500, 14), RC5T583_REG(DC2, DC2CTL, 0, DC2CTL, 1, 0x7F, 900, 2400, 12500, 14), RC5T583_REG(DC3, DC3CTL, 0, DC3CTL, 1, 0x7F, 900, 2400, 12500, 14), RC5T583_REG(LDO0, LDOEN2, 0, LDODIS2, 0, 0x7F, 900, 3400, 25000, 160), RC5T583_REG(LDO1, LDOEN2, 1, LDODIS2, 1, 0x7F, 900, 3400, 25000, 160), RC5T583_REG(LDO2, LDOEN2, 2, LDODIS2, 2, 0x7F, 900, 3400, 25000, 160), RC5T583_REG(LDO3, LDOEN2, 3, LDODIS2, 3, 0x7F, 900, 3400, 25000, 160), RC5T583_REG(LDO4, LDOEN2, 4, LDODIS2, 4, 0x3F, 750, 1500, 12500, 133), RC5T583_REG(LDO5, LDOEN2, 5, LDODIS2, 5, 0x7F, 900, 3400, 25000, 267), RC5T583_REG(LDO6, LDOEN2, 6, LDODIS2, 6, 0x7F, 900, 3400, 25000, 133), RC5T583_REG(LDO7, LDOEN2, 7, LDODIS2, 7, 0x7F, 900, 3400, 25000, 233), RC5T583_REG(LDO8, LDOEN1, 0, LDODIS1, 0, 0x7F, 900, 3400, 25000, 233), RC5T583_REG(LDO9, LDOEN1, 1, LDODIS1, 1, 0x7F, 900, 3400, 25000, 133), }; static int rc5t583_regulator_probe(struct platform_device *pdev) { struct rc5t583 *rc5t583 = dev_get_drvdata(pdev->dev.parent); struct rc5t583_platform_data *pdata = dev_get_platdata(rc5t583->dev); struct regulator_config config = { }; struct rc5t583_regulator *reg = NULL; struct rc5t583_regulator *regs; struct regulator_dev *rdev; struct rc5t583_regulator_info *ri; int ret; int id; if (!pdata) { dev_err(&pdev->dev, "No platform data, exiting...\n"); return -ENODEV; } regs = devm_kzalloc(&pdev->dev, RC5T583_REGULATOR_MAX * sizeof(struct rc5t583_regulator), GFP_KERNEL); if (!regs) return -ENOMEM; for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) { reg = ®s[id]; ri = &rc5t583_reg_info[id]; reg->reg_info = ri; if (ri->deepsleep_id == RC5T583_DS_NONE) goto skip_ext_pwr_config; ret = rc5t583_ext_power_req_config(rc5t583->dev, ri->deepsleep_id, pdata->regulator_ext_pwr_control[id], pdata->regulator_deepsleep_slot[id]); /* * Configuring external control is not a major issue, * just give warning. */ if (ret < 0) dev_warn(&pdev->dev, "Failed to configure ext control %d\n", id); skip_ext_pwr_config: config.dev = &pdev->dev; config.init_data = pdata->reg_init_data[id]; config.driver_data = reg; config.regmap = rc5t583->regmap; rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "Failed to register regulator %s\n", ri->desc.name); return PTR_ERR(rdev); } reg->rdev = rdev; } platform_set_drvdata(pdev, regs); return 0; } static struct platform_driver rc5t583_regulator_driver = { .driver = { .name = "rc5t583-regulator", .owner = THIS_MODULE, }, .probe = rc5t583_regulator_probe, }; static int __init rc5t583_regulator_init(void) { return platform_driver_register(&rc5t583_regulator_driver); } subsys_initcall(rc5t583_regulator_init); static void __exit rc5t583_regulator_exit(void) { platform_driver_unregister(&rc5t583_regulator_driver); } module_exit(rc5t583_regulator_exit); MODULE_AUTHOR("Laxman Dewangan <ldewangan@nvidia.com>"); MODULE_DESCRIPTION("RC5T583 regulator driver"); MODULE_ALIAS("platform:rc5t583-regulator"); MODULE_LICENSE("GPL v2"); |