/* * Driver for Regulator part of Palmas PMIC Chips * * Copyright 2011-2012 Texas Instruments Inc. * * Author: Graeme Gregory * * 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. * */ #include #include #include #include #include #include #include #include #include #include struct regs_info { char *name; u8 vsel_addr; u8 ctrl_addr; u8 tstep_addr; }; static const struct regs_info palmas_regs_info[] = { { .name = "SMPS12", .vsel_addr = PALMAS_SMPS12_VOLTAGE, .ctrl_addr = PALMAS_SMPS12_CTRL, .tstep_addr = PALMAS_SMPS12_TSTEP, }, { .name = "SMPS123", .vsel_addr = PALMAS_SMPS12_VOLTAGE, .ctrl_addr = PALMAS_SMPS12_CTRL, .tstep_addr = PALMAS_SMPS12_TSTEP, }, { .name = "SMPS3", .vsel_addr = PALMAS_SMPS3_VOLTAGE, .ctrl_addr = PALMAS_SMPS3_CTRL, }, { .name = "SMPS45", .vsel_addr = PALMAS_SMPS45_VOLTAGE, .ctrl_addr = PALMAS_SMPS45_CTRL, .tstep_addr = PALMAS_SMPS45_TSTEP, }, { .name = "SMPS457", .vsel_addr = PALMAS_SMPS45_VOLTAGE, .ctrl_addr = PALMAS_SMPS45_CTRL, .tstep_addr = PALMAS_SMPS45_TSTEP, }, { .name = "SMPS6", .vsel_addr = PALMAS_SMPS6_VOLTAGE, .ctrl_addr = PALMAS_SMPS6_CTRL, .tstep_addr = PALMAS_SMPS6_TSTEP, }, { .name = "SMPS7", .vsel_addr = PALMAS_SMPS7_VOLTAGE, .ctrl_addr = PALMAS_SMPS7_CTRL, }, { .name = "SMPS8", .vsel_addr = PALMAS_SMPS8_VOLTAGE, .ctrl_addr = PALMAS_SMPS8_CTRL, .tstep_addr = PALMAS_SMPS8_TSTEP, }, { .name = "SMPS9", .vsel_addr = PALMAS_SMPS9_VOLTAGE, .ctrl_addr = PALMAS_SMPS9_CTRL, }, { .name = "SMPS10", }, { .name = "LDO1", .vsel_addr = PALMAS_LDO1_VOLTAGE, .ctrl_addr = PALMAS_LDO1_CTRL, }, { .name = "LDO2", .vsel_addr = PALMAS_LDO2_VOLTAGE, .ctrl_addr = PALMAS_LDO2_CTRL, }, { .name = "LDO3", .vsel_addr = PALMAS_LDO3_VOLTAGE, .ctrl_addr = PALMAS_LDO3_CTRL, }, { .name = "LDO4", .vsel_addr = PALMAS_LDO4_VOLTAGE, .ctrl_addr = PALMAS_LDO4_CTRL, }, { .name = "LDO5", .vsel_addr = PALMAS_LDO5_VOLTAGE, .ctrl_addr = PALMAS_LDO5_CTRL, }, { .name = "LDO6", .vsel_addr = PALMAS_LDO6_VOLTAGE, .ctrl_addr = PALMAS_LDO6_CTRL, }, { .name = "LDO7", .vsel_addr = PALMAS_LDO7_VOLTAGE, .ctrl_addr = PALMAS_LDO7_CTRL, }, { .name = "LDO8", .vsel_addr = PALMAS_LDO8_VOLTAGE, .ctrl_addr = PALMAS_LDO8_CTRL, }, { .name = "LDO9", .vsel_addr = PALMAS_LDO9_VOLTAGE, .ctrl_addr = PALMAS_LDO9_CTRL, }, { .name = "LDOLN", .vsel_addr = PALMAS_LDOLN_VOLTAGE, .ctrl_addr = PALMAS_LDOLN_CTRL, }, { .name = "LDOUSB", .vsel_addr = PALMAS_LDOUSB_VOLTAGE, .ctrl_addr = PALMAS_LDOUSB_CTRL, }, }; #define SMPS_CTRL_MODE_OFF 0x00 #define SMPS_CTRL_MODE_ON 0x01 #define SMPS_CTRL_MODE_ECO 0x02 #define SMPS_CTRL_MODE_PWM 0x03 /* These values are derived from the data sheet. And are the number of steps * where there is a voltage change, the ranges at beginning and end of register * max/min values where there are no change are ommitted. * * So they are basically (maxV-minV)/stepV */ #define PALMAS_SMPS_NUM_VOLTAGES 116 #define PALMAS_SMPS10_NUM_VOLTAGES 2 #define PALMAS_LDO_NUM_VOLTAGES 50 #define SMPS10_VSEL (1<<3) #define SMPS10_BOOST_EN (1<<2) #define SMPS10_BYPASS_EN (1<<1) #define SMPS10_SWITCH_EN (1<<0) #define REGULATOR_SLAVE 0 static int palmas_smps_read(struct palmas *palmas, unsigned int reg, unsigned int *dest) { unsigned int addr; addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); } static int palmas_smps_write(struct palmas *palmas, unsigned int reg, unsigned int value) { unsigned int addr; addr = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, reg); return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); } static int palmas_ldo_read(struct palmas *palmas, unsigned int reg, unsigned int *dest) { unsigned int addr; addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); return regmap_read(palmas->regmap[REGULATOR_SLAVE], addr, dest); } static int palmas_ldo_write(struct palmas *palmas, unsigned int reg, unsigned int value) { unsigned int addr; addr = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, reg); return regmap_write(palmas->regmap[REGULATOR_SLAVE], addr, value); } static int palmas_is_enabled_smps(struct regulator_dev *dev) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg; palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; return !!(reg); } static int palmas_enable_smps(struct regulator_dev *dev) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg; palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; reg |= SMPS_CTRL_MODE_ON; palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); return 0; } static int palmas_disable_smps(struct regulator_dev *dev) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg; palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); return 0; } static int palmas_set_mode_smps(struct regulator_dev *dev, unsigned int mode) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg; palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); reg &= ~PALMAS_SMPS12_CTRL_MODE_ACTIVE_MASK; switch (mode) { case REGULATOR_MODE_NORMAL: reg |= SMPS_CTRL_MODE_ON; break; case REGULATOR_MODE_IDLE: reg |= SMPS_CTRL_MODE_ECO; break; case REGULATOR_MODE_FAST: reg |= SMPS_CTRL_MODE_PWM; break; default: return -EINVAL; } palmas_smps_write(pmic->palmas, palmas_regs_info[id].ctrl_addr, reg); return 0; } static unsigned int palmas_get_mode_smps(struct regulator_dev *dev) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg; palmas_smps_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); reg &= PALMAS_SMPS12_CTRL_STATUS_MASK; reg >>= PALMAS_SMPS12_CTRL_STATUS_SHIFT; switch (reg) { case SMPS_CTRL_MODE_ON: return REGULATOR_MODE_NORMAL; case SMPS_CTRL_MODE_ECO: return REGULATOR_MODE_IDLE; case SMPS_CTRL_MODE_PWM: return REGULATOR_MODE_FAST; } return 0; } static int palmas_list_voltage_smps(struct regulator_dev *dev, unsigned selector) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); int mult = 1; if (!selector) return 0; /* Read the multiplier set in VSEL register to return * the correct voltage. */ if (pmic->range[id]) mult = 2; /* Voltage is (0.49V + (selector * 0.01V)) * RANGE * as defined in data sheet. RANGE is either x1 or x2 */ return (490000 + (selector * 10000)) * mult; } static int palmas_get_voltage_smps_sel(struct regulator_dev *dev) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); int selector; unsigned int reg; unsigned int addr; addr = palmas_regs_info[id].vsel_addr; palmas_smps_read(pmic->palmas, addr, ®); selector = reg & PALMAS_SMPS12_VOLTAGE_VSEL_MASK; /* Adjust selector to match list_voltage ranges */ if ((selector > 0) && (selector < 6)) selector = 6; if (!selector) selector = 5; if (selector > 121) selector = 121; selector -= 5; return selector; } static int palmas_set_voltage_smps_sel(struct regulator_dev *dev, unsigned selector) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg = 0; unsigned int addr; addr = palmas_regs_info[id].vsel_addr; /* Make sure we don't change the value of RANGE */ if (pmic->range[id]) reg |= PALMAS_SMPS12_VOLTAGE_RANGE; /* Adjust the linux selector into range used in VSEL register */ if (selector) reg |= selector + 5; palmas_smps_write(pmic->palmas, addr, reg); return 0; } static int palmas_map_voltage_smps(struct regulator_dev *rdev, int min_uV, int max_uV) { int ret, voltage; ret = ((min_uV - 500000) / 10000) + 1; if (ret < 0) return ret; /* Map back into a voltage to verify we're still in bounds */ voltage = palmas_list_voltage_smps(rdev, ret); if (voltage < min_uV || voltage > max_uV) return -EINVAL; return ret; } static struct regulator_ops palmas_ops_smps = { .is_enabled = palmas_is_enabled_smps, .enable = palmas_enable_smps, .disable = palmas_disable_smps, .set_mode = palmas_set_mode_smps, .get_mode = palmas_get_mode_smps, .get_voltage_sel = palmas_get_voltage_smps_sel, .set_voltage_sel = palmas_set_voltage_smps_sel, .list_voltage = palmas_list_voltage_smps, .map_voltage = palmas_map_voltage_smps, }; static struct regulator_ops palmas_ops_smps10 = { .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, .list_voltage = regulator_list_voltage_linear, .map_voltage = regulator_map_voltage_linear, }; static int palmas_is_enabled_ldo(struct regulator_dev *dev) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg; palmas_ldo_read(pmic->palmas, palmas_regs_info[id].ctrl_addr, ®); reg &= PALMAS_LDO1_CTRL_STATUS; return !!(reg); } static int palmas_list_voltage_ldo(struct regulator_dev *dev, unsigned selector) { if (!selector) return 0; /* voltage is 0.85V + (selector * 0.05v) */ return 850000 + (selector * 50000); } static int palmas_get_voltage_ldo_sel(struct regulator_dev *dev) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); int selector; unsigned int reg; unsigned int addr; addr = palmas_regs_info[id].vsel_addr; palmas_ldo_read(pmic->palmas, addr, ®); selector = reg & PALMAS_LDO1_VOLTAGE_VSEL_MASK; /* Adjust selector to match list_voltage ranges */ if (selector > 49) selector = 49; return selector; } static int palmas_set_voltage_ldo_sel(struct regulator_dev *dev, unsigned selector) { struct palmas_pmic *pmic = rdev_get_drvdata(dev); int id = rdev_get_id(dev); unsigned int reg = 0; unsigned int addr; addr = palmas_regs_info[id].vsel_addr; reg = selector; palmas_ldo_write(pmic->palmas, addr, reg); return 0; } static int palmas_map_voltage_ldo(struct regulator_dev *rdev, int min_uV, int max_uV) { int ret, voltage; ret = ((min_uV - 900000) / 50000) + 1; if (ret < 0) return ret; /* Map back into a voltage to verify we're still in bounds */ voltage = palmas_list_voltage_ldo(rdev, ret); if (voltage < min_uV || voltage > max_uV) return -EINVAL; return ret; } static struct regulator_ops palmas_ops_ldo = { .is_enabled = palmas_is_enabled_ldo, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, .get_voltage_sel = palmas_get_voltage_ldo_sel, .set_voltage_sel = palmas_set_voltage_ldo_sel, .list_voltage = palmas_list_voltage_ldo, .map_voltage = palmas_map_voltage_ldo, }; /* * setup the hardware based sleep configuration of the SMPS/LDO regulators * from the platform data. This is different to the software based control * supported by the regulator framework as it is controlled by toggling * pins on the PMIC such as PREQ, SYSEN, ... */ static int palmas_smps_init(struct palmas *palmas, int id, struct palmas_reg_init *reg_init) { unsigned int reg; unsigned int addr; int ret; addr = palmas_regs_info[id].ctrl_addr; ret = palmas_smps_read(palmas, addr, ®); if (ret) return ret; switch (id) { case PALMAS_REG_SMPS10: if (reg_init->mode_sleep) { reg &= ~PALMAS_SMPS10_CTRL_MODE_SLEEP_MASK; reg |= reg_init->mode_sleep << PALMAS_SMPS10_CTRL_MODE_SLEEP_SHIFT; } break; default: if (reg_init->warm_reset) reg |= PALMAS_SMPS12_CTRL_WR_S; if (reg_init->roof_floor) reg |= PALMAS_SMPS12_CTRL_ROOF_FLOOR_EN; if (reg_init->mode_sleep) { reg &= ~PALMAS_SMPS12_CTRL_MODE_SLEEP_MASK; reg |= reg_init->mode_sleep << PALMAS_SMPS12_CTRL_MODE_SLEEP_SHIFT; } } ret = palmas_smps_write(palmas, addr, reg); if (ret) return ret; if (palmas_regs_info[id].tstep_addr && reg_init->tstep) { addr = palmas_regs_info[id].tstep_addr; reg = reg_init->tstep & PALMAS_SMPS12_TSTEP_TSTEP_MASK; ret = palmas_smps_write(palmas, addr, reg); if (ret) return ret; } if (palmas_regs_info[id].vsel_addr && reg_init->vsel) { addr = palmas_regs_info[id].vsel_addr; reg = reg_init->vsel; ret = palmas_smps_write(palmas, addr, reg); if (ret) return ret; } return 0; } static int palmas_ldo_init(struct palmas *palmas, int id, struct palmas_reg_init *reg_init) { unsigned int reg; unsigned int addr; int ret; addr = palmas_regs_info[id].ctrl_addr; ret = palmas_smps_read(palmas, addr, ®); if (ret) return ret; if (reg_init->warm_reset) reg |= PALMAS_LDO1_CTRL_WR_S; if (reg_init->mode_sleep) reg |= PALMAS_LDO1_CTRL_MODE_SLEEP; ret = palmas_smps_write(palmas, addr, reg); if (ret) return ret; return 0; } static __devinit int palmas_probe(struct platform_device *pdev) { struct palmas *palmas = dev_get_drvdata(pdev->dev.parent); struct palmas_pmic_platform_data *pdata = pdev->dev.platform_data; struct regulator_dev *rdev; struct regulator_config config = { }; struct palmas_pmic *pmic; struct palmas_reg_init *reg_init; int id = 0, ret; unsigned int addr, reg; if (!pdata) return -EINVAL; if (!pdata->reg_data) return -EINVAL; pmic = devm_kzalloc(&pdev->dev, sizeof(*pmic), GFP_KERNEL); if (!pmic) return -ENOMEM; pmic->dev = &pdev->dev; pmic->palmas = palmas; palmas->pmic = pmic; platform_set_drvdata(pdev, pmic); ret = palmas_smps_read(palmas, PALMAS_SMPS_CTRL, ®); if (ret) goto err_unregister_regulator; if (reg & PALMAS_SMPS_CTRL_SMPS12_SMPS123_EN) pmic->smps123 = 1; if (reg & PALMAS_SMPS_CTRL_SMPS45_SMPS457_EN) pmic->smps457 = 1; config.regmap = palmas->regmap[REGULATOR_SLAVE]; config.dev = &pdev->dev; config.driver_data = pmic; for (id = 0; id < PALMAS_REG_LDO1; id++) { /* * Miss out regulators which are not available due * to slaving configurations. */ switch (id) { case PALMAS_REG_SMPS12: case PALMAS_REG_SMPS3: if (pmic->smps123) continue; break; case PALMAS_REG_SMPS123: if (!pmic->smps123) continue; break; case PALMAS_REG_SMPS45: case PALMAS_REG_SMPS7: if (pmic->smps457) continue; break; case PALMAS_REG_SMPS457: if (!pmic->smps457) continue; } /* Register the regulators */ pmic->desc[id].name = palmas_regs_info[id].name; pmic->desc[id].id = id; switch (id) { case PALMAS_REG_SMPS10: pmic->desc[id].n_voltages = PALMAS_SMPS10_NUM_VOLTAGES; pmic->desc[id].ops = &palmas_ops_smps10; pmic->desc[id].vsel_reg = PALMAS_SMPS10_CTRL; pmic->desc[id].vsel_mask = SMPS10_VSEL; pmic->desc[id].enable_reg = PALMAS_SMPS10_STATUS; pmic->desc[id].enable_mask = SMPS10_BOOST_EN; pmic->desc[id].min_uV = 3750000; pmic->desc[id].uV_step = 1250000; break; default: pmic->desc[id].ops = &palmas_ops_smps; pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES; } pmic->desc[id].type = REGULATOR_VOLTAGE; pmic->desc[id].owner = THIS_MODULE; /* Initialise sleep/init values from platform data */ if (pdata && pdata->reg_init) { reg_init = pdata->reg_init[id]; if (reg_init) { ret = palmas_smps_init(palmas, id, reg_init); if (ret) goto err_unregister_regulator; } } /* * read and store the RANGE bit for later use * This must be done before regulator is probed otherwise * we error in probe with unsuportable ranges. */ if (id != PALMAS_REG_SMPS10) { addr = palmas_regs_info[id].vsel_addr; ret = palmas_smps_read(pmic->palmas, addr, ®); if (ret) goto err_unregister_regulator; if (reg & PALMAS_SMPS12_VOLTAGE_RANGE) pmic->range[id] = 1; } if (pdata && pdata->reg_data) config.init_data = pdata->reg_data[id]; else config.init_data = NULL; rdev = regulator_register(&pmic->desc[id], &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s regulator\n", pdev->name); ret = PTR_ERR(rdev); goto err_unregister_regulator; } /* Save regulator for cleanup */ pmic->rdev[id] = rdev; } /* Start this loop from the id left from previous loop */ for (; id < PALMAS_NUM_REGS; id++) { /* Miss out regulators which are not available due * to alternate functions. */ /* Register the regulators */ pmic->desc[id].name = palmas_regs_info[id].name; pmic->desc[id].id = id; pmic->desc[id].n_voltages = PALMAS_LDO_NUM_VOLTAGES; pmic->desc[id].ops = &palmas_ops_ldo; pmic->desc[id].type = REGULATOR_VOLTAGE; pmic->desc[id].owner = THIS_MODULE; pmic->desc[id].enable_reg = palmas_regs_info[id].ctrl_addr; pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE; if (pdata && pdata->reg_data) config.init_data = pdata->reg_data[id]; else config.init_data = NULL; rdev = regulator_register(&pmic->desc[id], &config); if (IS_ERR(rdev)) { dev_err(&pdev->dev, "failed to register %s regulator\n", pdev->name); ret = PTR_ERR(rdev); goto err_unregister_regulator; } /* Save regulator for cleanup */ pmic->rdev[id] = rdev; /* Initialise sleep/init values from platform data */ if (pdata->reg_init) { reg_init = pdata->reg_init[id]; if (reg_init) { ret = palmas_ldo_init(palmas, id, reg_init); if (ret) goto err_unregister_regulator; } } } return 0; err_unregister_regulator: while (--id >= 0) regulator_unregister(pmic->rdev[id]); kfree(pmic->rdev); kfree(pmic->desc); kfree(pmic); return ret; } static int __devexit palmas_remove(struct platform_device *pdev) { struct palmas_pmic *pmic = platform_get_drvdata(pdev); int id; for (id = 0; id < PALMAS_NUM_REGS; id++) regulator_unregister(pmic->rdev[id]); kfree(pmic->rdev); kfree(pmic->desc); kfree(pmic); return 0; } static struct platform_driver palmas_driver = { .driver = { .name = "palmas-pmic", .owner = THIS_MODULE, }, .probe = palmas_probe, .remove = __devexit_p(palmas_remove), }; static int __init palmas_init(void) { return platform_driver_register(&palmas_driver); } subsys_initcall(palmas_init); static void __exit palmas_exit(void) { platform_driver_unregister(&palmas_driver); } module_exit(palmas_exit); MODULE_AUTHOR("Graeme Gregory "); MODULE_DESCRIPTION("Palmas voltage regulator driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:palmas-pmic");