19952f691SThomas Gleixner // SPDX-License-Identifier: GPL-2.0-only 2452534e5SVenu Byravarasu /* 3452534e5SVenu Byravarasu * Regulator driver for tps65090 power management chip. 4452534e5SVenu Byravarasu * 5452534e5SVenu Byravarasu * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. 6452534e5SVenu Byravarasu 7452534e5SVenu Byravarasu */ 8452534e5SVenu Byravarasu 9452534e5SVenu Byravarasu #include <linux/module.h> 10ed11f1eaSDoug Anderson #include <linux/delay.h> 11452534e5SVenu Byravarasu #include <linux/init.h> 123012e814SLinus Walleij #include <linux/of.h> 133012e814SLinus Walleij #include <linux/gpio/consumer.h> 14452534e5SVenu Byravarasu #include <linux/slab.h> 15452534e5SVenu Byravarasu #include <linux/err.h> 16452534e5SVenu Byravarasu #include <linux/platform_device.h> 17452534e5SVenu Byravarasu #include <linux/regulator/driver.h> 18452534e5SVenu Byravarasu #include <linux/regulator/machine.h> 196c7a7a0eSLaxman Dewangan #include <linux/regulator/of_regulator.h> 20452534e5SVenu Byravarasu #include <linux/mfd/tps65090.h> 21452534e5SVenu Byravarasu 22ed11f1eaSDoug Anderson #define MAX_CTRL_READ_TRIES 5 23ed11f1eaSDoug Anderson #define MAX_FET_ENABLE_TRIES 1000 24ed11f1eaSDoug Anderson 25ed11f1eaSDoug Anderson #define CTRL_EN_BIT 0 /* Regulator enable bit, active high */ 2629041449SDoug Anderson #define CTRL_WT_BIT 2 /* Regulator wait time 0 bit */ 27ed11f1eaSDoug Anderson #define CTRL_PG_BIT 4 /* Regulator power good bit, 1=good */ 28ed11f1eaSDoug Anderson #define CTRL_TO_BIT 7 /* Regulator timeout bit, 1=wait */ 2929041449SDoug Anderson 3029041449SDoug Anderson #define MAX_OVERCURRENT_WAIT 3 /* Overcurrent wait must be <= this */ 3129041449SDoug Anderson 3229041449SDoug Anderson /** 3329041449SDoug Anderson * struct tps65090_regulator - Per-regulator data for a tps65090 regulator 3429041449SDoug Anderson * 3529041449SDoug Anderson * @dev: Pointer to our device. 3629041449SDoug Anderson * @desc: The struct regulator_desc for the regulator. 3729041449SDoug Anderson * @rdev: The struct regulator_dev for the regulator. 3829041449SDoug Anderson * @overcurrent_wait_valid: True if overcurrent_wait is valid. 3929041449SDoug Anderson * @overcurrent_wait: For FETs, the value to put in the WTFET bitfield. 4029041449SDoug Anderson */ 4129041449SDoug Anderson 42452534e5SVenu Byravarasu struct tps65090_regulator { 43452534e5SVenu Byravarasu struct device *dev; 4424282a1cSLaxman Dewangan struct regulator_desc *desc; 4524282a1cSLaxman Dewangan struct regulator_dev *rdev; 4629041449SDoug Anderson bool overcurrent_wait_valid; 4729041449SDoug Anderson int overcurrent_wait; 48452534e5SVenu Byravarasu }; 49452534e5SVenu Byravarasu 507d844ac3SRikard Falkeborn static const struct regulator_ops tps65090_ext_control_ops = { 51f329b175SLaxman Dewangan }; 52f329b175SLaxman Dewangan 5329041449SDoug Anderson /** 5429041449SDoug Anderson * tps65090_reg_set_overcurrent_wait - Setup overcurrent wait 5529041449SDoug Anderson * 5629041449SDoug Anderson * This will set the overcurrent wait time based on what's in the regulator 5729041449SDoug Anderson * info. 5829041449SDoug Anderson * 5929041449SDoug Anderson * @ri: Overall regulator data 6029041449SDoug Anderson * @rdev: Regulator device 6129041449SDoug Anderson * 6229041449SDoug Anderson * Return: 0 if no error, non-zero if there was an error writing the register. 6329041449SDoug Anderson */ 6429041449SDoug Anderson static int tps65090_reg_set_overcurrent_wait(struct tps65090_regulator *ri, 6529041449SDoug Anderson struct regulator_dev *rdev) 6629041449SDoug Anderson { 6729041449SDoug Anderson int ret; 6829041449SDoug Anderson 6929041449SDoug Anderson ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 7029041449SDoug Anderson MAX_OVERCURRENT_WAIT << CTRL_WT_BIT, 7129041449SDoug Anderson ri->overcurrent_wait << CTRL_WT_BIT); 7229041449SDoug Anderson if (ret) { 7329041449SDoug Anderson dev_err(&rdev->dev, "Error updating overcurrent wait %#x\n", 7429041449SDoug Anderson rdev->desc->enable_reg); 7529041449SDoug Anderson } 7629041449SDoug Anderson 7729041449SDoug Anderson return ret; 7829041449SDoug Anderson } 7929041449SDoug Anderson 80ed11f1eaSDoug Anderson /** 81ed11f1eaSDoug Anderson * tps65090_try_enable_fet - Try to enable a FET 82ed11f1eaSDoug Anderson * 83ed11f1eaSDoug Anderson * @rdev: Regulator device 84ed11f1eaSDoug Anderson * 85ed11f1eaSDoug Anderson * Return: 0 if ok, -ENOTRECOVERABLE if the FET power good bit did not get 86ed11f1eaSDoug Anderson * set, or some other -ve value if another error occurred (e.g. i2c error) 87ed11f1eaSDoug Anderson */ 88ed11f1eaSDoug Anderson static int tps65090_try_enable_fet(struct regulator_dev *rdev) 89ed11f1eaSDoug Anderson { 90ed11f1eaSDoug Anderson unsigned int control; 91ed11f1eaSDoug Anderson int ret, i; 92ed11f1eaSDoug Anderson 93ed11f1eaSDoug Anderson ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 94ed11f1eaSDoug Anderson rdev->desc->enable_mask, 95ed11f1eaSDoug Anderson rdev->desc->enable_mask); 96ed11f1eaSDoug Anderson if (ret < 0) { 97ed11f1eaSDoug Anderson dev_err(&rdev->dev, "Error in updating reg %#x\n", 98ed11f1eaSDoug Anderson rdev->desc->enable_reg); 99ed11f1eaSDoug Anderson return ret; 100ed11f1eaSDoug Anderson } 101ed11f1eaSDoug Anderson 102ed11f1eaSDoug Anderson for (i = 0; i < MAX_CTRL_READ_TRIES; i++) { 103ed11f1eaSDoug Anderson ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, 104ed11f1eaSDoug Anderson &control); 105ed11f1eaSDoug Anderson if (ret < 0) 106ed11f1eaSDoug Anderson return ret; 107ed11f1eaSDoug Anderson 108ed11f1eaSDoug Anderson if (!(control & BIT(CTRL_TO_BIT))) 109ed11f1eaSDoug Anderson break; 110ed11f1eaSDoug Anderson 111ed11f1eaSDoug Anderson usleep_range(1000, 1500); 112ed11f1eaSDoug Anderson } 113ed11f1eaSDoug Anderson if (!(control & BIT(CTRL_PG_BIT))) 114ed11f1eaSDoug Anderson return -ENOTRECOVERABLE; 115ed11f1eaSDoug Anderson 116ed11f1eaSDoug Anderson return 0; 117ed11f1eaSDoug Anderson } 118ed11f1eaSDoug Anderson 119ed11f1eaSDoug Anderson /** 120ed11f1eaSDoug Anderson * tps65090_fet_enable - Enable a FET, trying a few times if it fails 121ed11f1eaSDoug Anderson * 122ed11f1eaSDoug Anderson * Some versions of the tps65090 have issues when turning on the FETs. 123ed11f1eaSDoug Anderson * This function goes through several steps to ensure the best chance of the 124ed11f1eaSDoug Anderson * FET going on. Specifically: 125ed11f1eaSDoug Anderson * - We'll make sure that we bump the "overcurrent wait" to the maximum, which 126ed11f1eaSDoug Anderson * increases the chances that we'll turn on properly. 127ed11f1eaSDoug Anderson * - We'll retry turning the FET on multiple times (turning off in between). 128ed11f1eaSDoug Anderson * 129ed11f1eaSDoug Anderson * @rdev: Regulator device 130ed11f1eaSDoug Anderson * 131ed11f1eaSDoug Anderson * Return: 0 if ok, non-zero if it fails. 132ed11f1eaSDoug Anderson */ 133ed11f1eaSDoug Anderson static int tps65090_fet_enable(struct regulator_dev *rdev) 134ed11f1eaSDoug Anderson { 135ed11f1eaSDoug Anderson int ret, tries; 136ed11f1eaSDoug Anderson 137ed11f1eaSDoug Anderson /* 138ed11f1eaSDoug Anderson * Try enabling multiple times until we succeed since sometimes the 139ed11f1eaSDoug Anderson * first try times out. 140ed11f1eaSDoug Anderson */ 141ed11f1eaSDoug Anderson tries = 0; 142ed11f1eaSDoug Anderson while (true) { 143ed11f1eaSDoug Anderson ret = tps65090_try_enable_fet(rdev); 144ed11f1eaSDoug Anderson if (!ret) 145ed11f1eaSDoug Anderson break; 146ed11f1eaSDoug Anderson if (ret != -ENOTRECOVERABLE || tries == MAX_FET_ENABLE_TRIES) 147ed11f1eaSDoug Anderson goto err; 148ed11f1eaSDoug Anderson 149ed11f1eaSDoug Anderson /* Try turning the FET off (and then on again) */ 150ed11f1eaSDoug Anderson ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 151ed11f1eaSDoug Anderson rdev->desc->enable_mask, 0); 152ed11f1eaSDoug Anderson if (ret) 153ed11f1eaSDoug Anderson goto err; 154ed11f1eaSDoug Anderson 155ed11f1eaSDoug Anderson tries++; 156ed11f1eaSDoug Anderson } 157ed11f1eaSDoug Anderson 158ed11f1eaSDoug Anderson if (tries) 159ed11f1eaSDoug Anderson dev_warn(&rdev->dev, "reg %#x enable ok after %d tries\n", 160ed11f1eaSDoug Anderson rdev->desc->enable_reg, tries); 161ed11f1eaSDoug Anderson 162ed11f1eaSDoug Anderson return 0; 163ed11f1eaSDoug Anderson err: 164ed11f1eaSDoug Anderson dev_warn(&rdev->dev, "reg %#x enable failed\n", rdev->desc->enable_reg); 165ed11f1eaSDoug Anderson WARN_ON(1); 166ed11f1eaSDoug Anderson 167ed11f1eaSDoug Anderson return ret; 168ed11f1eaSDoug Anderson } 169ed11f1eaSDoug Anderson 1707d844ac3SRikard Falkeborn static const struct regulator_ops tps65090_reg_control_ops = { 17106c4998bSAxel Lin .enable = regulator_enable_regmap, 17206c4998bSAxel Lin .disable = regulator_disable_regmap, 17306c4998bSAxel Lin .is_enabled = regulator_is_enabled_regmap, 174452534e5SVenu Byravarasu }; 175452534e5SVenu Byravarasu 1767d844ac3SRikard Falkeborn static const struct regulator_ops tps65090_fet_control_ops = { 177ed11f1eaSDoug Anderson .enable = tps65090_fet_enable, 178ed11f1eaSDoug Anderson .disable = regulator_disable_regmap, 179ed11f1eaSDoug Anderson .is_enabled = regulator_is_enabled_regmap, 180ed11f1eaSDoug Anderson }; 181ed11f1eaSDoug Anderson 1827d844ac3SRikard Falkeborn static const struct regulator_ops tps65090_ldo_ops = { 1833a81ef8cSLaxman Dewangan }; 1843a81ef8cSLaxman Dewangan 1854f2352cfSJavier Martinez Canillas #define tps65090_REG_DESC(_id, _sname, _en_reg, _en_bits, _nvolt, _volt, _ops) \ 186452534e5SVenu Byravarasu { \ 18724282a1cSLaxman Dewangan .name = "TPS65090_RAILS"#_id, \ 18824282a1cSLaxman Dewangan .supply_name = _sname, \ 1898620ca9fSLaxman Dewangan .id = TPS65090_REGULATOR_##_id, \ 1904f2352cfSJavier Martinez Canillas .n_voltages = _nvolt, \ 19124282a1cSLaxman Dewangan .ops = &_ops, \ 1924f2352cfSJavier Martinez Canillas .fixed_uV = _volt, \ 19324282a1cSLaxman Dewangan .enable_reg = _en_reg, \ 194ed11f1eaSDoug Anderson .enable_val = _en_bits, \ 195ed11f1eaSDoug Anderson .enable_mask = _en_bits, \ 196452534e5SVenu Byravarasu .type = REGULATOR_VOLTAGE, \ 197452534e5SVenu Byravarasu .owner = THIS_MODULE, \ 198452534e5SVenu Byravarasu } 199452534e5SVenu Byravarasu 2004f2352cfSJavier Martinez Canillas #define tps65090_REG_FIXEDV(_id, _sname, en_reg, _en_bits, _volt, _ops) \ 2014f2352cfSJavier Martinez Canillas tps65090_REG_DESC(_id, _sname, en_reg, _en_bits, 1, _volt, _ops) 2024f2352cfSJavier Martinez Canillas 2034f2352cfSJavier Martinez Canillas #define tps65090_REG_SWITCH(_id, _sname, en_reg, _en_bits, _ops) \ 2044f2352cfSJavier Martinez Canillas tps65090_REG_DESC(_id, _sname, en_reg, _en_bits, 0, 0, _ops) 2054f2352cfSJavier Martinez Canillas 20624282a1cSLaxman Dewangan static struct regulator_desc tps65090_regulator_desc[] = { 2074f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(DCDC1, "vsys1", 0x0C, BIT(CTRL_EN_BIT), 5000000, 208ed11f1eaSDoug Anderson tps65090_reg_control_ops), 2094f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(DCDC2, "vsys2", 0x0D, BIT(CTRL_EN_BIT), 3300000, 210ed11f1eaSDoug Anderson tps65090_reg_control_ops), 2114f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(DCDC3, "vsys3", 0x0E, BIT(CTRL_EN_BIT), 212ed11f1eaSDoug Anderson tps65090_reg_control_ops), 213ed11f1eaSDoug Anderson 2144f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET1, "infet1", 0x0F, 215ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 216ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2174f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET2, "infet2", 0x10, 218ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 219ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2204f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET3, "infet3", 0x11, 221ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 222ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2234f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET4, "infet4", 0x12, 224ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 225ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2264f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET5, "infet5", 0x13, 227ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 228ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2294f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET6, "infet6", 0x14, 230ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 231ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2324f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET7, "infet7", 0x15, 233ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 234ed11f1eaSDoug Anderson tps65090_fet_control_ops), 235ed11f1eaSDoug Anderson 2364f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(LDO1, "vsys-l1", 0, 0, 5000000, 237ed11f1eaSDoug Anderson tps65090_ldo_ops), 2384f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(LDO2, "vsys-l2", 0, 0, 3300000, 239ed11f1eaSDoug Anderson tps65090_ldo_ops), 240452534e5SVenu Byravarasu }; 241452534e5SVenu Byravarasu 24224282a1cSLaxman Dewangan static inline bool is_dcdc(int id) 243452534e5SVenu Byravarasu { 24424282a1cSLaxman Dewangan switch (id) { 2458620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC1: 2468620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC2: 2478620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC3: 24824282a1cSLaxman Dewangan return true; 24924282a1cSLaxman Dewangan default: 25024282a1cSLaxman Dewangan return false; 251452534e5SVenu Byravarasu } 25224282a1cSLaxman Dewangan } 25324282a1cSLaxman Dewangan 254a5023574SBill Pemberton static int tps65090_config_ext_control( 25524282a1cSLaxman Dewangan struct tps65090_regulator *ri, bool enable) 25624282a1cSLaxman Dewangan { 25724282a1cSLaxman Dewangan int ret; 25824282a1cSLaxman Dewangan struct device *parent = ri->dev->parent; 25924282a1cSLaxman Dewangan unsigned int reg_en_reg = ri->desc->enable_reg; 26024282a1cSLaxman Dewangan 26124282a1cSLaxman Dewangan if (enable) 26224282a1cSLaxman Dewangan ret = tps65090_set_bits(parent, reg_en_reg, 1); 26324282a1cSLaxman Dewangan else 26424282a1cSLaxman Dewangan ret = tps65090_clr_bits(parent, reg_en_reg, 1); 26524282a1cSLaxman Dewangan if (ret < 0) 26624282a1cSLaxman Dewangan dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg); 26724282a1cSLaxman Dewangan return ret; 26824282a1cSLaxman Dewangan } 26924282a1cSLaxman Dewangan 270a5023574SBill Pemberton static int tps65090_regulator_disable_ext_control( 27124282a1cSLaxman Dewangan struct tps65090_regulator *ri, 27224282a1cSLaxman Dewangan struct tps65090_regulator_plat_data *tps_pdata) 27324282a1cSLaxman Dewangan { 27424282a1cSLaxman Dewangan int ret = 0; 27524282a1cSLaxman Dewangan struct device *parent = ri->dev->parent; 27624282a1cSLaxman Dewangan unsigned int reg_en_reg = ri->desc->enable_reg; 27724282a1cSLaxman Dewangan 27824282a1cSLaxman Dewangan /* 27924282a1cSLaxman Dewangan * First enable output for internal control if require. 28024282a1cSLaxman Dewangan * And then disable external control. 28124282a1cSLaxman Dewangan */ 28224282a1cSLaxman Dewangan if (tps_pdata->reg_init_data->constraints.always_on || 28324282a1cSLaxman Dewangan tps_pdata->reg_init_data->constraints.boot_on) { 28424282a1cSLaxman Dewangan ret = tps65090_set_bits(parent, reg_en_reg, 0); 28524282a1cSLaxman Dewangan if (ret < 0) { 28624282a1cSLaxman Dewangan dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg); 28724282a1cSLaxman Dewangan return ret; 28824282a1cSLaxman Dewangan } 28924282a1cSLaxman Dewangan } 29024282a1cSLaxman Dewangan return tps65090_config_ext_control(ri, false); 291452534e5SVenu Byravarasu } 292452534e5SVenu Byravarasu 2936c7a7a0eSLaxman Dewangan #ifdef CONFIG_OF 2946c7a7a0eSLaxman Dewangan static struct of_regulator_match tps65090_matches[] = { 2956c7a7a0eSLaxman Dewangan { .name = "dcdc1", }, 2966c7a7a0eSLaxman Dewangan { .name = "dcdc2", }, 2976c7a7a0eSLaxman Dewangan { .name = "dcdc3", }, 2986c7a7a0eSLaxman Dewangan { .name = "fet1", }, 2996c7a7a0eSLaxman Dewangan { .name = "fet2", }, 3006c7a7a0eSLaxman Dewangan { .name = "fet3", }, 3016c7a7a0eSLaxman Dewangan { .name = "fet4", }, 3026c7a7a0eSLaxman Dewangan { .name = "fet5", }, 3036c7a7a0eSLaxman Dewangan { .name = "fet6", }, 3046c7a7a0eSLaxman Dewangan { .name = "fet7", }, 3056c7a7a0eSLaxman Dewangan { .name = "ldo1", }, 3066c7a7a0eSLaxman Dewangan { .name = "ldo2", }, 3076c7a7a0eSLaxman Dewangan }; 3086c7a7a0eSLaxman Dewangan 3096c7a7a0eSLaxman Dewangan static struct tps65090_platform_data *tps65090_parse_dt_reg_data( 3106c7a7a0eSLaxman Dewangan struct platform_device *pdev, 3116c7a7a0eSLaxman Dewangan struct of_regulator_match **tps65090_reg_matches) 3126c7a7a0eSLaxman Dewangan { 3136c7a7a0eSLaxman Dewangan struct tps65090_platform_data *tps65090_pdata; 3146c7a7a0eSLaxman Dewangan struct device_node *np = pdev->dev.parent->of_node; 3156c7a7a0eSLaxman Dewangan struct device_node *regulators; 3166c7a7a0eSLaxman Dewangan int idx = 0, ret; 3176c7a7a0eSLaxman Dewangan struct tps65090_regulator_plat_data *reg_pdata; 3186c7a7a0eSLaxman Dewangan 3196c7a7a0eSLaxman Dewangan tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata), 3206c7a7a0eSLaxman Dewangan GFP_KERNEL); 3210ad91c69SSachin Kamat if (!tps65090_pdata) 3226c7a7a0eSLaxman Dewangan return ERR_PTR(-ENOMEM); 3236c7a7a0eSLaxman Dewangan 324a86854d0SKees Cook reg_pdata = devm_kcalloc(&pdev->dev, 325a86854d0SKees Cook TPS65090_REGULATOR_MAX, sizeof(*reg_pdata), 326a86854d0SKees Cook GFP_KERNEL); 3270ad91c69SSachin Kamat if (!reg_pdata) 3286c7a7a0eSLaxman Dewangan return ERR_PTR(-ENOMEM); 3296c7a7a0eSLaxman Dewangan 3304c850eadSLaxman Dewangan regulators = of_get_child_by_name(np, "regulators"); 3316c7a7a0eSLaxman Dewangan if (!regulators) { 3326c7a7a0eSLaxman Dewangan dev_err(&pdev->dev, "regulator node not found\n"); 3336c7a7a0eSLaxman Dewangan return ERR_PTR(-ENODEV); 3346c7a7a0eSLaxman Dewangan } 3356c7a7a0eSLaxman Dewangan 33609a228e7SAxel Lin ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches, 3376c7a7a0eSLaxman Dewangan ARRAY_SIZE(tps65090_matches)); 338026cdfe6SSachin Kamat of_node_put(regulators); 3396c7a7a0eSLaxman Dewangan if (ret < 0) { 3406c7a7a0eSLaxman Dewangan dev_err(&pdev->dev, 3416c7a7a0eSLaxman Dewangan "Error parsing regulator init data: %d\n", ret); 3426c7a7a0eSLaxman Dewangan return ERR_PTR(ret); 3436c7a7a0eSLaxman Dewangan } 3446c7a7a0eSLaxman Dewangan 3456c7a7a0eSLaxman Dewangan *tps65090_reg_matches = tps65090_matches; 3466c7a7a0eSLaxman Dewangan for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) { 3476c7a7a0eSLaxman Dewangan struct regulator_init_data *ri_data; 3486c7a7a0eSLaxman Dewangan struct tps65090_regulator_plat_data *rpdata; 34951d98ff8SDmitry Torokhov struct device_node *np; 3506c7a7a0eSLaxman Dewangan 3516c7a7a0eSLaxman Dewangan rpdata = ®_pdata[idx]; 3526c7a7a0eSLaxman Dewangan ri_data = tps65090_matches[idx].init_data; 35351d98ff8SDmitry Torokhov if (!ri_data) 35451d98ff8SDmitry Torokhov continue; 35551d98ff8SDmitry Torokhov 35651d98ff8SDmitry Torokhov np = tps65090_matches[idx].of_node; 35751d98ff8SDmitry Torokhov if (!np) 3586c7a7a0eSLaxman Dewangan continue; 3596c7a7a0eSLaxman Dewangan 3606c7a7a0eSLaxman Dewangan rpdata->reg_init_data = ri_data; 36151d98ff8SDmitry Torokhov rpdata->enable_ext_control = of_property_read_bool(np, 3626c7a7a0eSLaxman Dewangan "ti,enable-ext-control"); 3633012e814SLinus Walleij if (rpdata->enable_ext_control) { 3643012e814SLinus Walleij enum gpiod_flags gflags; 3653012e814SLinus Walleij 3663012e814SLinus Walleij if (ri_data->constraints.always_on || 3673012e814SLinus Walleij ri_data->constraints.boot_on) 3683012e814SLinus Walleij gflags = GPIOD_OUT_HIGH; 3693012e814SLinus Walleij else 3703012e814SLinus Walleij gflags = GPIOD_OUT_LOW; 37163239e4bSLinus Walleij gflags |= GPIOD_FLAGS_BIT_NONEXCLUSIVE; 3723012e814SLinus Walleij 37351d98ff8SDmitry Torokhov rpdata->gpiod = devm_fwnode_gpiod_get( 37451d98ff8SDmitry Torokhov &pdev->dev, 37551d98ff8SDmitry Torokhov of_fwnode_handle(np), 37651d98ff8SDmitry Torokhov "dcdc-ext-control", 3773012e814SLinus Walleij gflags, 3783012e814SLinus Walleij "tps65090"); 379025bf377SWaibel Georg if (PTR_ERR(rpdata->gpiod) == -ENOENT) { 3803012e814SLinus Walleij dev_err(&pdev->dev, 3813012e814SLinus Walleij "could not find DCDC external control GPIO\n"); 382025bf377SWaibel Georg rpdata->gpiod = NULL; 383025bf377SWaibel Georg } else if (IS_ERR(rpdata->gpiod)) 384025bf377SWaibel Georg return ERR_CAST(rpdata->gpiod); 3853012e814SLinus Walleij } 3866c7a7a0eSLaxman Dewangan 38751d98ff8SDmitry Torokhov if (of_property_read_u32(np, "ti,overcurrent-wait", 38829041449SDoug Anderson &rpdata->overcurrent_wait) == 0) 38929041449SDoug Anderson rpdata->overcurrent_wait_valid = true; 39029041449SDoug Anderson 3916c7a7a0eSLaxman Dewangan tps65090_pdata->reg_pdata[idx] = rpdata; 3926c7a7a0eSLaxman Dewangan } 3936c7a7a0eSLaxman Dewangan return tps65090_pdata; 3946c7a7a0eSLaxman Dewangan } 3956c7a7a0eSLaxman Dewangan #else 3966c7a7a0eSLaxman Dewangan static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data( 3976c7a7a0eSLaxman Dewangan struct platform_device *pdev, 3986c7a7a0eSLaxman Dewangan struct of_regulator_match **tps65090_reg_matches) 3996c7a7a0eSLaxman Dewangan { 4006c7a7a0eSLaxman Dewangan *tps65090_reg_matches = NULL; 4016c7a7a0eSLaxman Dewangan return NULL; 4026c7a7a0eSLaxman Dewangan } 4036c7a7a0eSLaxman Dewangan #endif 4046c7a7a0eSLaxman Dewangan 405a5023574SBill Pemberton static int tps65090_regulator_probe(struct platform_device *pdev) 406452534e5SVenu Byravarasu { 40706c4998bSAxel Lin struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent); 408452534e5SVenu Byravarasu struct tps65090_regulator *ri = NULL; 409c172708dSMark Brown struct regulator_config config = { }; 410452534e5SVenu Byravarasu struct regulator_dev *rdev; 41124282a1cSLaxman Dewangan struct tps65090_regulator_plat_data *tps_pdata; 41224282a1cSLaxman Dewangan struct tps65090_regulator *pmic; 41324282a1cSLaxman Dewangan struct tps65090_platform_data *tps65090_pdata; 4146c7a7a0eSLaxman Dewangan struct of_regulator_match *tps65090_reg_matches = NULL; 41524282a1cSLaxman Dewangan int num; 41624282a1cSLaxman Dewangan int ret; 417452534e5SVenu Byravarasu 41824282a1cSLaxman Dewangan dev_dbg(&pdev->dev, "Probing regulator\n"); 419452534e5SVenu Byravarasu 42024282a1cSLaxman Dewangan tps65090_pdata = dev_get_platdata(pdev->dev.parent); 4216c7a7a0eSLaxman Dewangan if (!tps65090_pdata && tps65090_mfd->dev->of_node) 4226c7a7a0eSLaxman Dewangan tps65090_pdata = tps65090_parse_dt_reg_data(pdev, 4236c7a7a0eSLaxman Dewangan &tps65090_reg_matches); 4246c7a7a0eSLaxman Dewangan if (IS_ERR_OR_NULL(tps65090_pdata)) { 42524282a1cSLaxman Dewangan dev_err(&pdev->dev, "Platform data missing\n"); 4266c7a7a0eSLaxman Dewangan return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL; 427452534e5SVenu Byravarasu } 428452534e5SVenu Byravarasu 429a86854d0SKees Cook pmic = devm_kcalloc(&pdev->dev, 430a86854d0SKees Cook TPS65090_REGULATOR_MAX, sizeof(*pmic), 43124282a1cSLaxman Dewangan GFP_KERNEL); 4320ad91c69SSachin Kamat if (!pmic) 43324282a1cSLaxman Dewangan return -ENOMEM; 434452534e5SVenu Byravarasu 4358620ca9fSLaxman Dewangan for (num = 0; num < TPS65090_REGULATOR_MAX; num++) { 43624282a1cSLaxman Dewangan tps_pdata = tps65090_pdata->reg_pdata[num]; 43724282a1cSLaxman Dewangan 43824282a1cSLaxman Dewangan ri = &pmic[num]; 43924282a1cSLaxman Dewangan ri->dev = &pdev->dev; 44024282a1cSLaxman Dewangan ri->desc = &tps65090_regulator_desc[num]; 441c122c5b6SDoug Anderson if (tps_pdata) { 442c122c5b6SDoug Anderson ri->overcurrent_wait_valid = 443c122c5b6SDoug Anderson tps_pdata->overcurrent_wait_valid; 44429041449SDoug Anderson ri->overcurrent_wait = tps_pdata->overcurrent_wait; 445c122c5b6SDoug Anderson } 44624282a1cSLaxman Dewangan 44724282a1cSLaxman Dewangan /* 44824282a1cSLaxman Dewangan * TPS5090 DCDC support the control from external digital input. 449f329b175SLaxman Dewangan * Configure it as per platform data. 45024282a1cSLaxman Dewangan */ 45124282a1cSLaxman Dewangan if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) { 452f329b175SLaxman Dewangan if (tps_pdata->enable_ext_control) { 4533012e814SLinus Walleij config.ena_gpiod = tps_pdata->gpiod; 454f329b175SLaxman Dewangan ri->desc->ops = &tps65090_ext_control_ops; 455f329b175SLaxman Dewangan } else { 45624282a1cSLaxman Dewangan ret = tps65090_regulator_disable_ext_control( 45724282a1cSLaxman Dewangan ri, tps_pdata); 45824282a1cSLaxman Dewangan if (ret < 0) { 45924282a1cSLaxman Dewangan dev_err(&pdev->dev, 46024282a1cSLaxman Dewangan "failed disable ext control\n"); 4619738efaeSSachin Kamat return ret; 46224282a1cSLaxman Dewangan } 46324282a1cSLaxman Dewangan } 464f329b175SLaxman Dewangan } 465f329b175SLaxman Dewangan 4666c7a7a0eSLaxman Dewangan config.dev = pdev->dev.parent; 46724282a1cSLaxman Dewangan config.driver_data = ri; 46824282a1cSLaxman Dewangan config.regmap = tps65090_mfd->rmap; 46924282a1cSLaxman Dewangan if (tps_pdata) 47024282a1cSLaxman Dewangan config.init_data = tps_pdata->reg_init_data; 47124282a1cSLaxman Dewangan else 47224282a1cSLaxman Dewangan config.init_data = NULL; 4736c7a7a0eSLaxman Dewangan if (tps65090_reg_matches) 4746c7a7a0eSLaxman Dewangan config.of_node = tps65090_reg_matches[num].of_node; 4756c7a7a0eSLaxman Dewangan else 4766c7a7a0eSLaxman Dewangan config.of_node = NULL; 47724282a1cSLaxman Dewangan 478870311e5SLinus Walleij /* 479870311e5SLinus Walleij * Hand the GPIO descriptor management over to the regulator 480870311e5SLinus Walleij * core, remove it from devres management. 481870311e5SLinus Walleij */ 482870311e5SLinus Walleij if (config.ena_gpiod) 483870311e5SLinus Walleij devm_gpiod_unhinge(&pdev->dev, config.ena_gpiod); 4849738efaeSSachin Kamat rdev = devm_regulator_register(&pdev->dev, ri->desc, &config); 48524282a1cSLaxman Dewangan if (IS_ERR(rdev)) { 48624282a1cSLaxman Dewangan dev_err(&pdev->dev, "failed to register regulator %s\n", 48724282a1cSLaxman Dewangan ri->desc->name); 4889738efaeSSachin Kamat return PTR_ERR(rdev); 48924282a1cSLaxman Dewangan } 49024282a1cSLaxman Dewangan ri->rdev = rdev; 491f329b175SLaxman Dewangan 49229041449SDoug Anderson if (ri->overcurrent_wait_valid) { 49329041449SDoug Anderson ret = tps65090_reg_set_overcurrent_wait(ri, rdev); 49429041449SDoug Anderson if (ret < 0) 49529041449SDoug Anderson return ret; 49629041449SDoug Anderson } 49729041449SDoug Anderson 498f329b175SLaxman Dewangan /* Enable external control if it is require */ 499f329b175SLaxman Dewangan if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data && 500f329b175SLaxman Dewangan tps_pdata->enable_ext_control) { 501f329b175SLaxman Dewangan ret = tps65090_config_ext_control(ri, true); 5029738efaeSSachin Kamat if (ret < 0) 5039738efaeSSachin Kamat return ret; 504f329b175SLaxman Dewangan } 50524282a1cSLaxman Dewangan } 50624282a1cSLaxman Dewangan 50724282a1cSLaxman Dewangan platform_set_drvdata(pdev, pmic); 508452534e5SVenu Byravarasu return 0; 509452534e5SVenu Byravarasu } 510452534e5SVenu Byravarasu 511452534e5SVenu Byravarasu static struct platform_driver tps65090_regulator_driver = { 512452534e5SVenu Byravarasu .driver = { 5138620ca9fSLaxman Dewangan .name = "tps65090-pmic", 514452534e5SVenu Byravarasu }, 515452534e5SVenu Byravarasu .probe = tps65090_regulator_probe, 516452534e5SVenu Byravarasu }; 517452534e5SVenu Byravarasu 518452534e5SVenu Byravarasu static int __init tps65090_regulator_init(void) 519452534e5SVenu Byravarasu { 520452534e5SVenu Byravarasu return platform_driver_register(&tps65090_regulator_driver); 521452534e5SVenu Byravarasu } 522452534e5SVenu Byravarasu subsys_initcall(tps65090_regulator_init); 523452534e5SVenu Byravarasu 524452534e5SVenu Byravarasu static void __exit tps65090_regulator_exit(void) 525452534e5SVenu Byravarasu { 526452534e5SVenu Byravarasu platform_driver_unregister(&tps65090_regulator_driver); 527452534e5SVenu Byravarasu } 528452534e5SVenu Byravarasu module_exit(tps65090_regulator_exit); 529452534e5SVenu Byravarasu 530452534e5SVenu Byravarasu MODULE_DESCRIPTION("tps65090 regulator driver"); 531452534e5SVenu Byravarasu MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); 532452534e5SVenu Byravarasu MODULE_LICENSE("GPL v2"); 533d95420b8SAxel Lin MODULE_ALIAS("platform:tps65090-pmic"); 534