/* * max77686.c - Regulator driver for the Maxim 77686 * * Copyright (C) 2012 Samsung Electronics * Chiwoong Byun <woong.byun@smasung.com> * Jonghwa Lee <jonghwa3.lee@samsung.com> * * 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 <linux/kernel.h> #include <linux/bug.h> #include <linux/err.h> #include <linux/gpio.h> #include <linux/slab.h> #include <linux/platform_device.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/of_regulator.h> #include <linux/mfd/max77686.h> #include <linux/mfd/max77686-private.h> #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 regulator_dev *rdev[MAX77686_REGULATORS]; unsigned int opmode[MAX77686_REGULATORS]; }; /* Some BUCKS supports Normal[ON/OFF] mode during suspend */ static int max77686_buck_set_suspend_disable(struct regulator_dev *rdev) { unsigned int val; struct max77686_data *max77686 = rdev_get_drvdata(rdev); int ret, id = rdev_get_id(rdev); if (id == MAX77686_BUCK1) val = 0x1; else val = 0x1 << MAX77686_OPMODE_BUCK234_SHIFT; ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val); if (ret) return ret; max77686->opmode[id] = val; return 0; } /* Some LDOs supports [LPM/Normal]ON mode during suspend state */ static int max77686_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode) { struct max77686_data *max77686 = rdev_get_drvdata(rdev); unsigned int val; int ret, id = rdev_get_id(rdev); /* BUCK[5-9] doesn't support this feature */ if (id >= MAX77686_BUCK5) return 0; switch (mode) { case REGULATOR_MODE_IDLE: /* ON in LP Mode */ val = 0x2 << MAX77686_OPMODE_SHIFT; break; case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ val = 0x3 << MAX77686_OPMODE_SHIFT; break; default: pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n", rdev->desc->name, mode); return -EINVAL; } ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val); if (ret) return ret; max77686->opmode[id] = val; return 0; } /* Some LDOs supports LPM-ON/OFF/Normal-ON mode during suspend state */ static int max77686_ldo_set_suspend_mode(struct regulator_dev *rdev, unsigned int mode) { unsigned int val; struct max77686_data *max77686 = rdev_get_drvdata(rdev); int ret; switch (mode) { case REGULATOR_MODE_STANDBY: /* switch off */ val = 0x1 << MAX77686_OPMODE_SHIFT; break; case REGULATOR_MODE_IDLE: /* ON in LP Mode */ val = 0x2 << MAX77686_OPMODE_SHIFT; break; case REGULATOR_MODE_NORMAL: /* ON in Normal Mode */ val = 0x3 << MAX77686_OPMODE_SHIFT; break; default: pr_warn("%s: regulator_suspend_mode : 0x%x not supported\n", rdev->desc->name, mode); return -EINVAL; } ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, val); if (ret) return ret; max77686->opmode[rdev_get_id(rdev)] = val; return 0; } static int max77686_enable(struct regulator_dev *rdev) { struct max77686_data *max77686 = rdev_get_drvdata(rdev); return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, rdev->desc->enable_mask, max77686->opmode[rdev_get_id(rdev)]); } static int max77686_set_ramp_delay(struct regulator_dev *rdev, int ramp_delay) { unsigned int ramp_value = RAMP_RATE_NO_CTRL; switch (ramp_delay) { case 1 ... 13750: ramp_value = RAMP_RATE_13P75MV; break; case 13751 ... 27500: ramp_value = RAMP_RATE_27P5MV; break; case 27501 ... 55000: ramp_value = RAMP_RATE_55MV; break; case 55001 ... 100000: break; default: pr_warn("%s: ramp_delay: %d not supported, setting 100000\n", rdev->desc->name, ramp_delay); } return regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, MAX77686_RAMP_RATE_MASK, ramp_value << 6); } 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 = max77686_enable, .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, .set_suspend_mode = max77686_set_suspend_mode, }; static struct regulator_ops max77686_ldo_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = max77686_enable, .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, .set_suspend_mode = max77686_ldo_set_suspend_mode, }; static struct regulator_ops max77686_buck1_ops = { .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, .is_enabled = regulator_is_enabled_regmap, .enable = max77686_enable, .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, .set_suspend_disable = max77686_buck_set_suspend_disable, }; 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 = max77686_enable, .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, .set_ramp_delay = max77686_set_ramp_delay, .set_suspend_disable = max77686_buck_set_suspend_disable, }; #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_lpm_ldo(num) { \ .name = "LDO"#num, \ .id = MAX77686_LDO##num, \ .ops = &max77686_ldo_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_ldo_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_ldo1_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_buck1_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_ldo1_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_lpm_ldo(10), regulator_desc_lpm_ldo(11), regulator_desc_lpm_ldo(12), regulator_desc_ldo(13), regulator_desc_lpm_ldo(14), regulator_desc_ldo_low(15), regulator_desc_lpm_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), }; #ifdef CONFIG_OF static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev, struct max77686_platform_data *pdata) { struct max77686_dev *iodev = dev_get_drvdata(pdev->dev.parent); struct device_node *pmic_np, *regulators_np; struct max77686_regulator_data *rdata; struct of_regulator_match rmatch; unsigned int i; pmic_np = iodev->dev->of_node; regulators_np = of_find_node_by_name(pmic_np, "voltage-regulators"); if (!regulators_np) { dev_err(&pdev->dev, "could not find regulators sub-node\n"); return -EINVAL; } pdata->num_regulators = ARRAY_SIZE(regulators); rdata = devm_kzalloc(&pdev->dev, sizeof(*rdata) * pdata->num_regulators, GFP_KERNEL); if (!rdata) { dev_err(&pdev->dev, "could not allocate memory for regulator data\n"); return -ENOMEM; } for (i = 0; i < pdata->num_regulators; i++) { rmatch.name = regulators[i].name; rmatch.init_data = NULL; rmatch.of_node = NULL; of_regulator_match(&pdev->dev, regulators_np, &rmatch, 1); rdata[i].initdata = rmatch.init_data; rdata[i].of_node = rmatch.of_node; } pdata->regulators = rdata; return 0; } #else static int max77686_pmic_dt_parse_pdata(struct platform_device *pdev, struct max77686_platform_data *pdata) { return 0; } #endif /* CONFIG_OF */ static 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 max77686_data *max77686; int i, ret = 0; struct regulator_config config = { }; dev_dbg(&pdev->dev, "%s\n", __func__); if (!pdata) { dev_err(&pdev->dev, "no platform data found for regulator\n"); return -ENODEV; } if (iodev->dev->of_node) { ret = max77686_pmic_dt_parse_pdata(pdev, pdata); if (ret) return ret; } if (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; config.dev = &pdev->dev; config.regmap = iodev->regmap; config.driver_data = max77686; platform_set_drvdata(pdev, max77686); for (i = 0; i < MAX77686_REGULATORS; i++) { config.init_data = pdata->regulators[i].initdata; config.of_node = pdata->regulators[i].of_node; max77686->opmode[i] = regulators[i].enable_mask; max77686->rdev[i] = regulator_register(®ulators[i], &config); if (IS_ERR(max77686->rdev[i])) { ret = PTR_ERR(max77686->rdev[i]); dev_err(&pdev->dev, "regulator init failed for %d\n", i); max77686->rdev[i] = NULL; goto err; } } return 0; err: while (--i >= 0) regulator_unregister(max77686->rdev[i]); return ret; } static int max77686_pmic_remove(struct platform_device *pdev) { struct max77686_data *max77686 = platform_get_drvdata(pdev); int i; for (i = 0; i < MAX77686_REGULATORS; i++) regulator_unregister(max77686->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 = 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 <woong.byun@samsung.com>"); MODULE_LICENSE("GPL");