/* * Regulator driver for TI TPS6586x * * Copyright (C) 2010 Compulab Ltd. * Author: Mike Rapoport <mike@compulab.co.il> * * Based on da903x * Copyright (C) 2006-2008 Marvell International Ltd. * Copyright (C) 2008 Compulab Ltd. * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License version 2 as * published by the Free Software Foundation. */ #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/of.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/tps6586x.h> /* supply control and voltage setting */ #define TPS6586X_SUPPLYENA 0x10 #define TPS6586X_SUPPLYENB 0x11 #define TPS6586X_SUPPLYENC 0x12 #define TPS6586X_SUPPLYEND 0x13 #define TPS6586X_SUPPLYENE 0x14 #define TPS6586X_VCC1 0x20 #define TPS6586X_VCC2 0x21 #define TPS6586X_SM1V1 0x23 #define TPS6586X_SM1V2 0x24 #define TPS6586X_SM1SL 0x25 #define TPS6586X_SM0V1 0x26 #define TPS6586X_SM0V2 0x27 #define TPS6586X_SM0SL 0x28 #define TPS6586X_LDO2AV1 0x29 #define TPS6586X_LDO2AV2 0x2A #define TPS6586X_LDO2BV1 0x2F #define TPS6586X_LDO2BV2 0x30 #define TPS6586X_LDO4V1 0x32 #define TPS6586X_LDO4V2 0x33 /* converter settings */ #define TPS6586X_SUPPLYV1 0x41 #define TPS6586X_SUPPLYV2 0x42 #define TPS6586X_SUPPLYV3 0x43 #define TPS6586X_SUPPLYV4 0x44 #define TPS6586X_SUPPLYV5 0x45 #define TPS6586X_SUPPLYV6 0x46 #define TPS6586X_SMODE1 0x47 #define TPS6586X_SMODE2 0x48 struct tps6586x_regulator { struct regulator_desc desc; int enable_bit[2]; int enable_reg[2]; }; static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev) { return rdev_get_dev(rdev)->parent; } static struct regulator_ops tps6586x_regulator_ops = { .list_voltage = regulator_list_voltage_table, .map_voltage = regulator_map_voltage_ascend, .get_voltage_sel = regulator_get_voltage_sel_regmap, .set_voltage_sel = regulator_set_voltage_sel_regmap, .is_enabled = regulator_is_enabled_regmap, .enable = regulator_enable_regmap, .disable = regulator_disable_regmap, }; static struct regulator_ops tps6586x_sys_regulator_ops = { }; static const unsigned int tps6586x_ldo0_voltages[] = { 1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, }; static const unsigned int tps6586x_ldo4_voltages[] = { 1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000, 1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000, 2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000, 2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000, }; static const unsigned int tps6586x_ldo_voltages[] = { 1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000, }; static const unsigned int tps6586x_sm2_voltages[] = { 3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000, 3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000, 3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000, 4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000, }; static const unsigned int tps6586x_dvm_voltages[] = { 725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000, 925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000, 1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000, 1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000, }; #define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \ ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ .desc = { \ .supply_name = _pin_name, \ .name = "REG-" #_id, \ .ops = &tps6586x_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = TPS6586X_ID_##_id, \ .n_voltages = ARRAY_SIZE(tps6586x_##vdata##_voltages), \ .volt_table = tps6586x_##vdata##_voltages, \ .owner = THIS_MODULE, \ .enable_reg = TPS6586X_SUPPLY##ereg0, \ .enable_mask = 1 << (ebit0), \ .vsel_reg = TPS6586X_##vreg, \ .vsel_mask = ((1 << (nbits)) - 1) << (shift), \ .apply_reg = (goreg), \ .apply_bit = (gobit), \ }, \ .enable_reg[0] = TPS6586X_SUPPLY##ereg0, \ .enable_bit[0] = (ebit0), \ .enable_reg[1] = TPS6586X_SUPPLY##ereg1, \ .enable_bit[1] = (ebit1), #define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \ ereg0, ebit0, ereg1, ebit1) \ { \ TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ ereg0, ebit0, ereg1, ebit1, 0, 0) \ } #define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \ ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ { \ TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \ ereg0, ebit0, ereg1, ebit1, goreg, gobit) \ } #define TPS6586X_SYS_REGULATOR() \ { \ .desc = { \ .supply_name = "sys", \ .name = "REG-SYS", \ .ops = &tps6586x_sys_regulator_ops, \ .type = REGULATOR_VOLTAGE, \ .id = TPS6586X_ID_SYS, \ .owner = THIS_MODULE, \ }, \ } static struct tps6586x_regulator tps6586x_regulator[] = { TPS6586X_SYS_REGULATOR(), TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0), TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2), TPS6586X_LDO(LDO_5, "REG-SYS", ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6), TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4), TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5), TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6), TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7), TPS6586X_LDO(LDO_RTC, "REG-SYS", ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7), TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1), TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7), TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3, ENB, 3, TPS6586X_VCC2, BIT(6)), TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3, END, 3, TPS6586X_VCC1, BIT(6)), TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1, ENB, 1, TPS6586X_VCC1, BIT(2)), TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0, ENB, 0, TPS6586X_VCC1, BIT(0)), }; /* * TPS6586X has 2 enable bits that are OR'ed to determine the actual * regulator state. Clearing one of this bits allows switching * regulator on and of with single register write. */ static inline int tps6586x_regulator_preinit(struct device *parent, struct tps6586x_regulator *ri) { uint8_t val1, val2; int ret; if (ri->enable_reg[0] == ri->enable_reg[1] && ri->enable_bit[0] == ri->enable_bit[1]) return 0; ret = tps6586x_read(parent, ri->enable_reg[0], &val1); if (ret) return ret; ret = tps6586x_read(parent, ri->enable_reg[1], &val2); if (ret) return ret; if (!(val2 & (1 << ri->enable_bit[1]))) return 0; /* * The regulator is on, but it's enabled with the bit we don't * want to use, so we switch the enable bits */ if (!(val1 & (1 << ri->enable_bit[0]))) { ret = tps6586x_set_bits(parent, ri->enable_reg[0], 1 << ri->enable_bit[0]); if (ret) return ret; } return tps6586x_clr_bits(parent, ri->enable_reg[1], 1 << ri->enable_bit[1]); } static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev, int id, struct regulator_init_data *p) { struct device *parent = pdev->dev.parent; struct tps6586x_settings *setting = p->driver_data; uint8_t reg; if (setting == NULL) return 0; if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET)) return 0; /* only SM0 and SM1 can have the slew rate settings */ switch (id) { case TPS6586X_ID_SM_0: reg = TPS6586X_SM0SL; break; case TPS6586X_ID_SM_1: reg = TPS6586X_SM1SL; break; default: dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n"); return -EINVAL; } return tps6586x_write(parent, reg, setting->slew_rate & TPS6586X_SLEW_RATE_MASK); } static inline struct tps6586x_regulator *find_regulator_info(int id) { struct tps6586x_regulator *ri; int i; for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) { ri = &tps6586x_regulator[i]; if (ri->desc.id == id) return ri; } return NULL; } #ifdef CONFIG_OF static struct of_regulator_match tps6586x_matches[] = { { .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS }, { .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 }, { .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 }, { .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 }, { .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 }, { .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 }, { .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 }, { .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 }, { .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 }, { .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 }, { .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 }, { .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 }, { .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 }, { .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 }, { .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC }, }; static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( struct platform_device *pdev, struct of_regulator_match **tps6586x_reg_matches) { const unsigned int num = ARRAY_SIZE(tps6586x_matches); struct device_node *np = pdev->dev.parent->of_node; struct device_node *regs; const char *sys_rail = NULL; unsigned int i; struct tps6586x_platform_data *pdata; int err; regs = of_get_child_by_name(np, "regulators"); if (!regs) { dev_err(&pdev->dev, "regulator node not found\n"); return NULL; } err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num); of_node_put(regs); if (err < 0) { dev_err(&pdev->dev, "Regulator match failed, e %d\n", err); return NULL; } pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); if (!pdata) { dev_err(&pdev->dev, "Memory alloction failed\n"); return NULL; } for (i = 0; i < num; i++) { int id; if (!tps6586x_matches[i].init_data) continue; pdata->reg_init_data[i] = tps6586x_matches[i].init_data; id = (int)tps6586x_matches[i].driver_data; if (id == TPS6586X_ID_SYS) sys_rail = pdata->reg_init_data[i]->constraints.name; if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC)) pdata->reg_init_data[i]->supply_regulator = sys_rail; } *tps6586x_reg_matches = tps6586x_matches; return pdata; } #else static struct tps6586x_platform_data *tps6586x_parse_regulator_dt( struct platform_device *pdev, struct of_regulator_match **tps6586x_reg_matches) { *tps6586x_reg_matches = NULL; return NULL; } #endif static int tps6586x_regulator_probe(struct platform_device *pdev) { struct tps6586x_regulator *ri = NULL; struct regulator_config config = { }; struct regulator_dev **rdev; struct regulator_init_data *reg_data; struct tps6586x_platform_data *pdata; struct of_regulator_match *tps6586x_reg_matches = NULL; int id; int err; dev_dbg(&pdev->dev, "Probing regulator\n"); pdata = dev_get_platdata(pdev->dev.parent); if ((!pdata) && (pdev->dev.parent->of_node)) pdata = tps6586x_parse_regulator_dt(pdev, &tps6586x_reg_matches); if (!pdata) { dev_err(&pdev->dev, "Platform data not available, exiting\n"); return -ENODEV; } rdev = devm_kzalloc(&pdev->dev, TPS6586X_ID_MAX_REGULATOR * sizeof(*rdev), GFP_KERNEL); if (!rdev) { dev_err(&pdev->dev, "Mmemory alloc failed\n"); return -ENOMEM; } for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) { reg_data = pdata->reg_init_data[id]; ri = find_regulator_info(id); if (!ri) { dev_err(&pdev->dev, "invalid regulator ID specified\n"); return -EINVAL; } err = tps6586x_regulator_preinit(pdev->dev.parent, ri); if (err) { dev_err(&pdev->dev, "regulator %d preinit failed, e %d\n", id, err); return err; } config.dev = pdev->dev.parent; config.init_data = reg_data; config.driver_data = ri; if (tps6586x_reg_matches) config.of_node = tps6586x_reg_matches[id].of_node; rdev[id] = devm_regulator_register(&pdev->dev, &ri->desc, &config); if (IS_ERR(rdev[id])) { dev_err(&pdev->dev, "failed to register regulator %s\n", ri->desc.name); return PTR_ERR(rdev[id]); } if (reg_data) { err = tps6586x_regulator_set_slew_rate(pdev, id, reg_data); if (err < 0) { dev_err(&pdev->dev, "Slew rate config failed, e %d\n", err); return err; } } } platform_set_drvdata(pdev, rdev); return 0; } static struct platform_driver tps6586x_regulator_driver = { .driver = { .name = "tps6586x-regulator", .owner = THIS_MODULE, }, .probe = tps6586x_regulator_probe, }; static int __init tps6586x_regulator_init(void) { return platform_driver_register(&tps6586x_regulator_driver); } subsys_initcall(tps6586x_regulator_init); static void __exit tps6586x_regulator_exit(void) { platform_driver_unregister(&tps6586x_regulator_driver); } module_exit(tps6586x_regulator_exit); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>"); MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC"); MODULE_ALIAS("platform:tps6586x-regulator");