/* * max77686.c - Regulator driver for the Maxim 77686 * * Copyright (C) 2012 Samsung Electronics * Chiwoong Byun * Jonghwa Lee * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that 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, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA * * This driver is based on max8997.c */ #include #include #include #include #include #include #include #include #include #include #include #define MAX77686_LDO_MINUV 800000 #define MAX77686_LDO_UVSTEP 50000 #define MAX77686_LDO_LOW_MINUV 800000 #define MAX77686_LDO_LOW_UVSTEP 25000 #define MAX77686_BUCK_MINUV 750000 #define MAX77686_BUCK_UVSTEP 50000 #define MAX77686_RAMP_DELAY 100000 /* uV/us */ #define MAX77686_DVS_RAMP_DELAY 27500 /* uV/us */ #define MAX77686_DVS_MINUV 600000 #define MAX77686_DVS_UVSTEP 12500 #define MAX77686_OPMODE_SHIFT 6 #define MAX77686_OPMODE_BUCK234_SHIFT 4 #define MAX77686_OPMODE_MASK 0x3 #define MAX77686_VSEL_MASK 0x3F #define MAX77686_DVS_VSEL_MASK 0xFF #define MAX77686_RAMP_RATE_MASK 0xC0 #define MAX77686_REGULATORS MAX77686_REG_MAX #define MAX77686_LDOS 26 enum max77686_ramp_rate { RAMP_RATE_13P75MV, RAMP_RATE_27P5MV, RAMP_RATE_55MV, RAMP_RATE_NO_CTRL, /* 100mV/us */ }; struct max77686_data { struct device *dev; struct max77686_dev *iodev; struct regulator_dev **rdev; }; static struct regulator_ops max77686_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, }; static struct regulator_ops max77686_buck_dvs_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .set_voltage_time_sel = regulator_set_voltage_time_sel, }; #define regulator_desc_ldo(num) { \ .name = "LDO"#num, \ .id = MAX77686_LDO##num, \ .ops = &max77686_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = MAX77686_LDO_MINUV, \ .uV_step = MAX77686_LDO_UVSTEP, \ .ramp_delay = MAX77686_RAMP_DELAY, \ .n_voltages = MAX77686_VSEL_MASK + 1, \ .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \ .vsel_mask = MAX77686_VSEL_MASK, \ .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \ .enable_mask = MAX77686_OPMODE_MASK \ << MAX77686_OPMODE_SHIFT, \ } #define regulator_desc_ldo_low(num) { \ .name = "LDO"#num, \ .id = MAX77686_LDO##num, \ .ops = &max77686_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = MAX77686_LDO_LOW_MINUV, \ .uV_step = MAX77686_LDO_LOW_UVSTEP, \ .ramp_delay = MAX77686_RAMP_DELAY, \ .n_voltages = MAX77686_VSEL_MASK + 1, \ .vsel_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \ .vsel_mask = MAX77686_VSEL_MASK, \ .enable_reg = MAX77686_REG_LDO1CTRL1 + num - 1, \ .enable_mask = MAX77686_OPMODE_MASK \ << MAX77686_OPMODE_SHIFT, \ } #define regulator_desc_buck(num) { \ .name = "BUCK"#num, \ .id = MAX77686_BUCK##num, \ .ops = &max77686_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = MAX77686_BUCK_MINUV, \ .uV_step = MAX77686_BUCK_UVSTEP, \ .ramp_delay = MAX77686_RAMP_DELAY, \ .n_voltages = MAX77686_VSEL_MASK + 1, \ .vsel_reg = MAX77686_REG_BUCK5OUT + (num - 5) * 2, \ .vsel_mask = MAX77686_VSEL_MASK, \ .enable_reg = MAX77686_REG_BUCK5CTRL + (num - 5) * 2, \ .enable_mask = MAX77686_OPMODE_MASK, \ } #define regulator_desc_buck1(num) { \ .name = "BUCK"#num, \ .id = MAX77686_BUCK##num, \ .ops = &max77686_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = MAX77686_BUCK_MINUV, \ .uV_step = MAX77686_BUCK_UVSTEP, \ .ramp_delay = MAX77686_RAMP_DELAY, \ .n_voltages = MAX77686_VSEL_MASK + 1, \ .vsel_reg = MAX77686_REG_BUCK1OUT, \ .vsel_mask = MAX77686_VSEL_MASK, \ .enable_reg = MAX77686_REG_BUCK1CTRL, \ .enable_mask = MAX77686_OPMODE_MASK, \ } #define regulator_desc_buck_dvs(num) { \ .name = "BUCK"#num, \ .id = MAX77686_BUCK##num, \ .ops = &max77686_buck_dvs_ops, \ .type = REGULATOR_VOLTAGE, \ .owner = THIS_MODULE, \ .min_uV = MAX77686_DVS_MINUV, \ .uV_step = MAX77686_DVS_UVSTEP, \ .ramp_delay = MAX77686_DVS_RAMP_DELAY, \ .n_voltages = MAX77686_DVS_VSEL_MASK + 1, \ .vsel_reg = MAX77686_REG_BUCK2DVS1 + (num - 2) * 10, \ .vsel_mask = MAX77686_DVS_VSEL_MASK, \ .enable_reg = MAX77686_REG_BUCK2CTRL1 + (num - 2) * 10, \ .enable_mask = MAX77686_OPMODE_MASK \ << MAX77686_OPMODE_BUCK234_SHIFT, \ } static struct regulator_desc regulators[] = { regulator_desc_ldo_low(1), regulator_desc_ldo_low(2), regulator_desc_ldo(3), regulator_desc_ldo(4), regulator_desc_ldo(5), regulator_desc_ldo_low(6), regulator_desc_ldo_low(7), regulator_desc_ldo_low(8), regulator_desc_ldo(9), regulator_desc_ldo(10), regulator_desc_ldo(11), regulator_desc_ldo(12), regulator_desc_ldo(13), regulator_desc_ldo(14), regulator_desc_ldo_low(15), regulator_desc_ldo(16), regulator_desc_ldo(17), regulator_desc_ldo(18), regulator_desc_ldo(19), regulator_desc_ldo(20), regulator_desc_ldo(21), regulator_desc_ldo(22), regulator_desc_ldo(23), regulator_desc_ldo(24), regulator_desc_ldo(25), regulator_desc_ldo(26), regulator_desc_buck1(1), regulator_desc_buck_dvs(2), regulator_desc_buck_dvs(3), regulator_desc_buck_dvs(4), regulator_desc_buck(5), regulator_desc_buck(6), regulator_desc_buck(7), regulator_desc_buck(8), regulator_desc_buck(9), }; static __devinit int max77686_pmic_probe(struct platform_device *pdev) { struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); struct max77686_platform_data *pdata = dev_get_platdata(iodev->dev); struct regulator_dev **rdev; struct max77686_data *max77686; int i, size; int ret = 0; struct regulator_config config = { }; dev_dbg(&pdev->dev, "%s\n", __func__); if (!pdata || pdata->num_regulators != MAX77686_REGULATORS) { dev_err(&pdev->dev, "Invalid initial data for regulator's initialiation\n"); return -EINVAL; } max77686 = devm_kzalloc(&pdev->dev, sizeof(struct max77686_data), GFP_KERNEL); if (!max77686) return -ENOMEM; size = sizeof(struct regulator_dev *) * MAX77686_REGULATORS; max77686->rdev = devm_kzalloc(&pdev->dev, size, GFP_KERNEL); if (!max77686->rdev) return -ENOMEM; rdev = max77686->rdev; max77686->dev = &pdev->dev; max77686->iodev = iodev; platform_set_drvdata(pdev, max77686); for (i = 0; i < MAX77686_REGULATORS; i++) { config.dev = max77686->dev; config.regmap = iodev->regmap; config.driver_data = max77686; config.init_data = pdata->regulators[i].initdata; rdev[i] = regulator_register(®ulators[i], &config); if (IS_ERR(rdev[i])) { ret = PTR_ERR(rdev[i]); dev_err(max77686->dev, "regulator init failed for %d\n", i); rdev[i] = NULL; goto err; } } return 0; err: while (--i >= 0) regulator_unregister(rdev[i]); return ret; } static int __devexit max77686_pmic_remove(struct platform_device *pdev) { struct max77686_data *max77686 = platform_get_drvdata(pdev); struct regulator_dev **rdev = max77686->rdev; int i; for (i = 0; i < MAX77686_REGULATORS; i++) if (rdev[i]) regulator_unregister(rdev[i]); return 0; } static const struct platform_device_id max77686_pmic_id[] = { {"max77686-pmic", 0}, { }, }; MODULE_DEVICE_TABLE(platform, max77686_pmic_id); static struct platform_driver max77686_pmic_driver = { .driver = { .name = "max77686-pmic", .owner = THIS_MODULE, }, .probe = max77686_pmic_probe, .remove = __devexit_p(max77686_pmic_remove), .id_table = max77686_pmic_id, }; static int __init max77686_pmic_init(void) { return platform_driver_register(&max77686_pmic_driver); } subsys_initcall(max77686_pmic_init); static void __exit max77686_pmic_cleanup(void) { platform_driver_unregister(&max77686_pmic_driver); } module_exit(max77686_pmic_cleanup); MODULE_DESCRIPTION("MAXIM 77686 Regulator Driver"); MODULE_AUTHOR("Chiwoong Byun "); MODULE_LICENSE("GPL");