/* * Driver for Regulator part of Palmas PMIC Chips * * Copyright 2011-2012 Texas Instruments Inc. * * Author: Graeme Gregory * Author: Ian Lartey * * 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 #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 117 #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; /* Read the multiplier set in VSEL register to return * the correct voltage. */ if (pmic->range[id]) mult = 2; if (selector == 0) return 0; else if (selector < 6) return 500000 * mult; else /* Voltage is linear mapping starting from selector 6, * volt = (0.49V + ((selector - 5) * 0.01V)) * RANGE * RANGE is either x1 or x2 */ return (490000 + ((selector - 5) * 10000)) * mult; } static int palmas_map_voltage_smps(struct regulator_dev *rdev, int min_uV, int max_uV) { struct palmas_pmic *pmic = rdev_get_drvdata(rdev); int id = rdev_get_id(rdev); int ret, voltage; if (min_uV == 0) return 0; if (pmic->range[id]) { /* RANGE is x2 */ if (min_uV < 1000000) min_uV = 1000000; ret = DIV_ROUND_UP(min_uV - 1000000, 20000) + 6; } else { /* RANGE is x1 */ if (min_uV < 500000) min_uV = 500000; ret = DIV_ROUND_UP(min_uV - 500000, 10000) + 6; } /* 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 = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .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 struct regulator_ops palmas_ops_ldo = { .is_enabled = palmas_is_enabled_ldo, .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, }; /* * 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_ldo_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_ldo_write(palmas, addr, reg); if (ret) return ret; return 0; } static struct of_regulator_match palmas_matches[] = { { .name = "smps12", }, { .name = "smps123", }, { .name = "smps3", }, { .name = "smps45", }, { .name = "smps457", }, { .name = "smps6", }, { .name = "smps7", }, { .name = "smps8", }, { .name = "smps9", }, { .name = "smps10", }, { .name = "ldo1", }, { .name = "ldo2", }, { .name = "ldo3", }, { .name = "ldo4", }, { .name = "ldo5", }, { .name = "ldo6", }, { .name = "ldo7", }, { .name = "ldo8", }, { .name = "ldo9", }, { .name = "ldoln", }, { .name = "ldousb", }, }; static void palmas_dt_to_pdata(struct device *dev, struct device_node *node, struct palmas_pmic_platform_data *pdata) { struct device_node *regulators; u32 prop; int idx, ret; node = of_node_get(node); regulators = of_find_node_by_name(node, "regulators"); if (!regulators) { dev_info(dev, "regulator node not found\n"); return; } ret = of_regulator_match(dev, regulators, palmas_matches, PALMAS_NUM_REGS); of_node_put(regulators); if (ret < 0) { dev_err(dev, "Error parsing regulator init data: %d\n", ret); return; } for (idx = 0; idx < PALMAS_NUM_REGS; idx++) { if (!palmas_matches[idx].init_data || !palmas_matches[idx].of_node) continue; pdata->reg_data[idx] = palmas_matches[idx].init_data; pdata->reg_init[idx] = devm_kzalloc(dev, sizeof(struct palmas_reg_init), GFP_KERNEL); ret = of_property_read_u32(palmas_matches[idx].of_node, "ti,warm_reset", &prop); if (!ret) pdata->reg_init[idx]->warm_reset = prop; ret = of_property_read_u32(palmas_matches[idx].of_node, "ti,roof_floor", &prop); if (!ret) pdata->reg_init[idx]->roof_floor = prop; ret = of_property_read_u32(palmas_matches[idx].of_node, "ti,mode_sleep", &prop); if (!ret) pdata->reg_init[idx]->mode_sleep = prop; ret = of_property_read_u32(palmas_matches[idx].of_node, "ti,tstep", &prop); if (!ret) pdata->reg_init[idx]->tstep = prop; ret = of_property_read_u32(palmas_matches[idx].of_node, "ti,vsel", &prop); if (!ret) pdata->reg_init[idx]->vsel = prop; } ret = of_property_read_u32(node, "ti,ldo6_vibrator", &prop); if (!ret) pdata->ldo6_vibrator = prop; } static 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 device_node *node = pdev->dev.of_node; 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 (node && !pdata) { pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) return -ENOMEM; palmas_dt_to_pdata(&pdev->dev, node, pdata); } 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) return ret; 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; } /* Initialise sleep/init values from platform data */ if (pdata && pdata->reg_init[id]) { reg_init = pdata->reg_init[id]; ret = palmas_smps_init(palmas, id, reg_init); if (ret) goto err_unregister_regulator; } /* 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_BASE_TO_REG(PALMAS_SMPS_BASE, PALMAS_SMPS10_CTRL); pmic->desc[id].vsel_mask = SMPS10_VSEL; pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, 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: /* * Read and store the RANGE bit for later use * This must be done before regulator is probed, * otherwise we error in probe with unsupportable ranges. */ 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; pmic->desc[id].ops = &palmas_ops_smps; pmic->desc[id].n_voltages = PALMAS_SMPS_NUM_VOLTAGES; pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_SMPS_BASE, palmas_regs_info[id].vsel_addr); pmic->desc[id].vsel_mask = PALMAS_SMPS12_VOLTAGE_VSEL_MASK; } pmic->desc[id].type = REGULATOR_VOLTAGE; pmic->desc[id].owner = THIS_MODULE; if (pdata) config.init_data = pdata->reg_data[id]; else config.init_data = NULL; config.of_node = palmas_matches[id].of_node; 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].min_uV = 900000; pmic->desc[id].uV_step = 50000; pmic->desc[id].linear_min_sel = 1; pmic->desc[id].vsel_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, palmas_regs_info[id].vsel_addr); pmic->desc[id].vsel_mask = PALMAS_LDO1_VOLTAGE_VSEL_MASK; pmic->desc[id].enable_reg = PALMAS_BASE_TO_REG(PALMAS_LDO_BASE, palmas_regs_info[id].ctrl_addr); pmic->desc[id].enable_mask = PALMAS_LDO1_CTRL_MODE_ACTIVE; if (pdata) config.init_data = pdata->reg_data[id]; else config.init_data = NULL; config.of_node = palmas_matches[id].of_node; 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 = pdata->reg_init[id]; if (reg_init) { ret = palmas_ldo_init(palmas, id, reg_init); if (ret) { regulator_unregister(pmic->rdev[id]); goto err_unregister_regulator; } } } } return 0; err_unregister_regulator: while (--id >= 0) regulator_unregister(pmic->rdev[id]); return ret; } static int 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]); return 0; } static struct of_device_id of_palmas_match_tbl[] = { { .compatible = "ti,palmas-pmic", }, { /* end */ } }; static struct platform_driver palmas_driver = { .driver = { .name = "palmas-pmic", .of_match_table = of_palmas_match_tbl, .owner = THIS_MODULE, }, .probe = palmas_probe, .remove = 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"); MODULE_DEVICE_TABLE(of, of_palmas_match_tbl);