/* * Regulator driver for RICOH RC5T583 power management chip. * * Copyright (c) 2011-2012, NVIDIA CORPORATION. All rights reserved. * Author: Laxman dewangan * * 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 . * */ #include #include #include #include #include #include #include #include #include #include struct rc5t583_regulator_info { int deepsleep_id; /* Regulator register address.*/ uint8_t reg_disc_reg; uint8_t disc_bit; uint8_t vout_reg; uint8_t vout_mask; uint8_t deepsleep_reg; /* Chip constraints on regulator behavior */ int min_uV; int max_uV; int step_uV; /* Regulator specific turn-on delay and voltage settling time*/ int enable_uv_per_us; int change_uv_per_us; /* Used by regulator core */ struct regulator_desc desc; }; struct rc5t583_regulator { struct rc5t583_regulator_info *reg_info; /* Devices */ struct device *dev; struct rc5t583 *mfd; struct regulator_dev *rdev; }; static int rc5t583_list_voltage(struct regulator_dev *rdev, unsigned selector) { struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); struct rc5t583_regulator_info *ri = reg->reg_info; return ri->min_uV + (ri->step_uV * selector); } static int rc5t583_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); struct rc5t583_regulator_info *ri = reg->reg_info; int sel, ret; if (min_uV < ri->min_uV) min_uV = ri->min_uV; sel = DIV_ROUND_UP(min_uV - ri->min_uV, ri->step_uV); if (sel >= rdev->desc->n_voltages) { dev_err(&rdev->dev, "Invalid selector 0x%02x\n", sel); return -EINVAL; } *selector = sel; ret = rc5t583_update(reg->mfd->dev, ri->vout_reg, sel, ri->vout_mask); if (ret < 0) dev_err(&rdev->dev, "Error in update voltage register 0x%02x\n", ri->vout_reg); return ret; } static int rc5t583_get_voltage_sel(struct regulator_dev *rdev) { struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); struct rc5t583_regulator_info *ri = reg->reg_info; uint8_t vsel; int ret; ret = rc5t583_read(reg->mfd->dev, ri->vout_reg, &vsel); if (ret < 0) { dev_err(&rdev->dev, "Error in reading voltage register 0x%02x\n", ri->vout_reg); return ret; } return vsel & ri->vout_mask; } static int rc5t583_regulator_enable_time(struct regulator_dev *rdev) { struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); int vsel = rc5t583_get_voltage_sel(rdev); int curr_uV = rc5t583_list_voltage(rdev, vsel); return DIV_ROUND_UP(curr_uV, reg->reg_info->enable_uv_per_us); } static int rc5t583_set_voltage_time_sel(struct regulator_dev *rdev, unsigned int old_selector, unsigned int new_selector) { struct rc5t583_regulator *reg = rdev_get_drvdata(rdev); int old_uV, new_uV; old_uV = rc5t583_list_voltage(rdev, old_selector); if (old_uV < 0) return old_uV; new_uV = rc5t583_list_voltage(rdev, new_selector); if (new_uV < 0) return new_uV; return DIV_ROUND_UP(abs(old_uV - new_uV), reg->reg_info->change_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 = rc5t583_get_voltage_sel, .set_voltage = rc5t583_set_voltage, .list_voltage = rc5t583_list_voltage, .set_voltage_time_sel = rc5t583_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, \ .vout_reg = RC5T583_REG_##_id##DAC, \ .vout_mask = _vout_mask, \ .deepsleep_reg = RC5T583_REG_##_id##DAC_DS, \ .min_uV = _min_mv * 1000, \ .max_uV = _max_mv * 1000, \ .step_uV = _step_uV, \ .enable_uv_per_us = _enable_mv * 1000, \ .change_uv_per_us = 40 * 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, \ .enable_reg = RC5T583_REG_##_en_reg, \ .enable_mask = BIT(_en_bit), \ }, \ } 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 __devinit 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_init_data *reg_data; 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) { dev_err(&pdev->dev, "Memory allocation failed exiting..\n"); return -ENOMEM; } for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) { reg_data = pdata->reg_init_data[id]; /* No need to register if there is no regulator data */ if (!reg_data) continue; reg = ®s[id]; ri = &rc5t583_reg_info[id]; reg->reg_info = ri; reg->mfd = rc5t583; reg->dev = &pdev->dev; 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 = reg_data; config.driver_data = reg; config.regmap = rc5t583->regmap; rdev = regulator_register(&ri->desc, &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "Failed to register regulator %s\n", ri->desc.name); ret = PTR_ERR(rdev); goto clean_exit; } reg->rdev = rdev; } platform_set_drvdata(pdev, regs); return 0; clean_exit: while (--id >= 0) regulator_unregister(regs[id].rdev); return ret; } static int __devexit rc5t583_regulator_remove(struct platform_device *pdev) { struct rc5t583_regulator *regs = platform_get_drvdata(pdev); int id; for (id = 0; id < RC5T583_REGULATOR_MAX; ++id) regulator_unregister(regs[id].rdev); return 0; } static struct platform_driver rc5t583_regulator_driver = { .driver = { .name = "rc5t583-regulator", .owner = THIS_MODULE, }, .probe = rc5t583_regulator_probe, .remove = __devexit_p(rc5t583_regulator_remove), }; 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 "); MODULE_DESCRIPTION("RC5T583 regulator driver"); MODULE_ALIAS("platform:rc5t583-regulator"); MODULE_LICENSE("GPL v2");