1452534e5SVenu Byravarasu /* 2452534e5SVenu Byravarasu * Regulator driver for tps65090 power management chip. 3452534e5SVenu Byravarasu * 4452534e5SVenu Byravarasu * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. 5452534e5SVenu Byravarasu 6452534e5SVenu Byravarasu * This program is free software; you can redistribute it and/or modify it 7452534e5SVenu Byravarasu * under the terms and conditions of the GNU General Public License, 8452534e5SVenu Byravarasu * version 2, as published by the Free Software Foundation. 9452534e5SVenu Byravarasu 10452534e5SVenu Byravarasu * This program is distributed in the hope it will be useful, but WITHOUT 11452534e5SVenu Byravarasu * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 12452534e5SVenu Byravarasu * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for 13452534e5SVenu Byravarasu * more details. 14452534e5SVenu Byravarasu 15452534e5SVenu Byravarasu * You should have received a copy of the GNU General Public License 16452534e5SVenu Byravarasu * along with this program. If not, see <http://www.gnu.org/licenses/> 17452534e5SVenu Byravarasu */ 18452534e5SVenu Byravarasu 19452534e5SVenu Byravarasu #include <linux/module.h> 20ed11f1eaSDoug Anderson #include <linux/delay.h> 21452534e5SVenu Byravarasu #include <linux/init.h> 223012e814SLinus Walleij #include <linux/of.h> 233012e814SLinus Walleij #include <linux/gpio/consumer.h> 24452534e5SVenu Byravarasu #include <linux/slab.h> 25452534e5SVenu Byravarasu #include <linux/err.h> 26452534e5SVenu Byravarasu #include <linux/platform_device.h> 27452534e5SVenu Byravarasu #include <linux/regulator/driver.h> 28452534e5SVenu Byravarasu #include <linux/regulator/machine.h> 296c7a7a0eSLaxman Dewangan #include <linux/regulator/of_regulator.h> 30452534e5SVenu Byravarasu #include <linux/mfd/tps65090.h> 31452534e5SVenu Byravarasu 32ed11f1eaSDoug Anderson #define MAX_CTRL_READ_TRIES 5 33ed11f1eaSDoug Anderson #define MAX_FET_ENABLE_TRIES 1000 34ed11f1eaSDoug Anderson 35ed11f1eaSDoug Anderson #define CTRL_EN_BIT 0 /* Regulator enable bit, active high */ 3629041449SDoug Anderson #define CTRL_WT_BIT 2 /* Regulator wait time 0 bit */ 37ed11f1eaSDoug Anderson #define CTRL_PG_BIT 4 /* Regulator power good bit, 1=good */ 38ed11f1eaSDoug Anderson #define CTRL_TO_BIT 7 /* Regulator timeout bit, 1=wait */ 3929041449SDoug Anderson 4029041449SDoug Anderson #define MAX_OVERCURRENT_WAIT 3 /* Overcurrent wait must be <= this */ 4129041449SDoug Anderson 4229041449SDoug Anderson /** 4329041449SDoug Anderson * struct tps65090_regulator - Per-regulator data for a tps65090 regulator 4429041449SDoug Anderson * 4529041449SDoug Anderson * @dev: Pointer to our device. 4629041449SDoug Anderson * @desc: The struct regulator_desc for the regulator. 4729041449SDoug Anderson * @rdev: The struct regulator_dev for the regulator. 4829041449SDoug Anderson * @overcurrent_wait_valid: True if overcurrent_wait is valid. 4929041449SDoug Anderson * @overcurrent_wait: For FETs, the value to put in the WTFET bitfield. 5029041449SDoug Anderson */ 5129041449SDoug Anderson 52452534e5SVenu Byravarasu struct tps65090_regulator { 53452534e5SVenu Byravarasu struct device *dev; 5424282a1cSLaxman Dewangan struct regulator_desc *desc; 5524282a1cSLaxman Dewangan struct regulator_dev *rdev; 5629041449SDoug Anderson bool overcurrent_wait_valid; 5729041449SDoug Anderson int overcurrent_wait; 58452534e5SVenu Byravarasu }; 59452534e5SVenu Byravarasu 60f329b175SLaxman Dewangan static struct regulator_ops tps65090_ext_control_ops = { 61f329b175SLaxman Dewangan }; 62f329b175SLaxman Dewangan 6329041449SDoug Anderson /** 6429041449SDoug Anderson * tps65090_reg_set_overcurrent_wait - Setup overcurrent wait 6529041449SDoug Anderson * 6629041449SDoug Anderson * This will set the overcurrent wait time based on what's in the regulator 6729041449SDoug Anderson * info. 6829041449SDoug Anderson * 6929041449SDoug Anderson * @ri: Overall regulator data 7029041449SDoug Anderson * @rdev: Regulator device 7129041449SDoug Anderson * 7229041449SDoug Anderson * Return: 0 if no error, non-zero if there was an error writing the register. 7329041449SDoug Anderson */ 7429041449SDoug Anderson static int tps65090_reg_set_overcurrent_wait(struct tps65090_regulator *ri, 7529041449SDoug Anderson struct regulator_dev *rdev) 7629041449SDoug Anderson { 7729041449SDoug Anderson int ret; 7829041449SDoug Anderson 7929041449SDoug Anderson ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 8029041449SDoug Anderson MAX_OVERCURRENT_WAIT << CTRL_WT_BIT, 8129041449SDoug Anderson ri->overcurrent_wait << CTRL_WT_BIT); 8229041449SDoug Anderson if (ret) { 8329041449SDoug Anderson dev_err(&rdev->dev, "Error updating overcurrent wait %#x\n", 8429041449SDoug Anderson rdev->desc->enable_reg); 8529041449SDoug Anderson } 8629041449SDoug Anderson 8729041449SDoug Anderson return ret; 8829041449SDoug Anderson } 8929041449SDoug Anderson 90ed11f1eaSDoug Anderson /** 91ed11f1eaSDoug Anderson * tps65090_try_enable_fet - Try to enable a FET 92ed11f1eaSDoug Anderson * 93ed11f1eaSDoug Anderson * @rdev: Regulator device 94ed11f1eaSDoug Anderson * 95ed11f1eaSDoug Anderson * Return: 0 if ok, -ENOTRECOVERABLE if the FET power good bit did not get 96ed11f1eaSDoug Anderson * set, or some other -ve value if another error occurred (e.g. i2c error) 97ed11f1eaSDoug Anderson */ 98ed11f1eaSDoug Anderson static int tps65090_try_enable_fet(struct regulator_dev *rdev) 99ed11f1eaSDoug Anderson { 100ed11f1eaSDoug Anderson unsigned int control; 101ed11f1eaSDoug Anderson int ret, i; 102ed11f1eaSDoug Anderson 103ed11f1eaSDoug Anderson ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 104ed11f1eaSDoug Anderson rdev->desc->enable_mask, 105ed11f1eaSDoug Anderson rdev->desc->enable_mask); 106ed11f1eaSDoug Anderson if (ret < 0) { 107ed11f1eaSDoug Anderson dev_err(&rdev->dev, "Error in updating reg %#x\n", 108ed11f1eaSDoug Anderson rdev->desc->enable_reg); 109ed11f1eaSDoug Anderson return ret; 110ed11f1eaSDoug Anderson } 111ed11f1eaSDoug Anderson 112ed11f1eaSDoug Anderson for (i = 0; i < MAX_CTRL_READ_TRIES; i++) { 113ed11f1eaSDoug Anderson ret = regmap_read(rdev->regmap, rdev->desc->enable_reg, 114ed11f1eaSDoug Anderson &control); 115ed11f1eaSDoug Anderson if (ret < 0) 116ed11f1eaSDoug Anderson return ret; 117ed11f1eaSDoug Anderson 118ed11f1eaSDoug Anderson if (!(control & BIT(CTRL_TO_BIT))) 119ed11f1eaSDoug Anderson break; 120ed11f1eaSDoug Anderson 121ed11f1eaSDoug Anderson usleep_range(1000, 1500); 122ed11f1eaSDoug Anderson } 123ed11f1eaSDoug Anderson if (!(control & BIT(CTRL_PG_BIT))) 124ed11f1eaSDoug Anderson return -ENOTRECOVERABLE; 125ed11f1eaSDoug Anderson 126ed11f1eaSDoug Anderson return 0; 127ed11f1eaSDoug Anderson } 128ed11f1eaSDoug Anderson 129ed11f1eaSDoug Anderson /** 130ed11f1eaSDoug Anderson * tps65090_fet_enable - Enable a FET, trying a few times if it fails 131ed11f1eaSDoug Anderson * 132ed11f1eaSDoug Anderson * Some versions of the tps65090 have issues when turning on the FETs. 133ed11f1eaSDoug Anderson * This function goes through several steps to ensure the best chance of the 134ed11f1eaSDoug Anderson * FET going on. Specifically: 135ed11f1eaSDoug Anderson * - We'll make sure that we bump the "overcurrent wait" to the maximum, which 136ed11f1eaSDoug Anderson * increases the chances that we'll turn on properly. 137ed11f1eaSDoug Anderson * - We'll retry turning the FET on multiple times (turning off in between). 138ed11f1eaSDoug Anderson * 139ed11f1eaSDoug Anderson * @rdev: Regulator device 140ed11f1eaSDoug Anderson * 141ed11f1eaSDoug Anderson * Return: 0 if ok, non-zero if it fails. 142ed11f1eaSDoug Anderson */ 143ed11f1eaSDoug Anderson static int tps65090_fet_enable(struct regulator_dev *rdev) 144ed11f1eaSDoug Anderson { 145ed11f1eaSDoug Anderson int ret, tries; 146ed11f1eaSDoug Anderson 147ed11f1eaSDoug Anderson /* 148ed11f1eaSDoug Anderson * Try enabling multiple times until we succeed since sometimes the 149ed11f1eaSDoug Anderson * first try times out. 150ed11f1eaSDoug Anderson */ 151ed11f1eaSDoug Anderson tries = 0; 152ed11f1eaSDoug Anderson while (true) { 153ed11f1eaSDoug Anderson ret = tps65090_try_enable_fet(rdev); 154ed11f1eaSDoug Anderson if (!ret) 155ed11f1eaSDoug Anderson break; 156ed11f1eaSDoug Anderson if (ret != -ENOTRECOVERABLE || tries == MAX_FET_ENABLE_TRIES) 157ed11f1eaSDoug Anderson goto err; 158ed11f1eaSDoug Anderson 159ed11f1eaSDoug Anderson /* Try turning the FET off (and then on again) */ 160ed11f1eaSDoug Anderson ret = regmap_update_bits(rdev->regmap, rdev->desc->enable_reg, 161ed11f1eaSDoug Anderson rdev->desc->enable_mask, 0); 162ed11f1eaSDoug Anderson if (ret) 163ed11f1eaSDoug Anderson goto err; 164ed11f1eaSDoug Anderson 165ed11f1eaSDoug Anderson tries++; 166ed11f1eaSDoug Anderson } 167ed11f1eaSDoug Anderson 168ed11f1eaSDoug Anderson if (tries) 169ed11f1eaSDoug Anderson dev_warn(&rdev->dev, "reg %#x enable ok after %d tries\n", 170ed11f1eaSDoug Anderson rdev->desc->enable_reg, tries); 171ed11f1eaSDoug Anderson 172ed11f1eaSDoug Anderson return 0; 173ed11f1eaSDoug Anderson err: 174ed11f1eaSDoug Anderson dev_warn(&rdev->dev, "reg %#x enable failed\n", rdev->desc->enable_reg); 175ed11f1eaSDoug Anderson WARN_ON(1); 176ed11f1eaSDoug Anderson 177ed11f1eaSDoug Anderson return ret; 178ed11f1eaSDoug Anderson } 179ed11f1eaSDoug Anderson 180ed11f1eaSDoug Anderson static struct regulator_ops tps65090_reg_control_ops = { 18106c4998bSAxel Lin .enable = regulator_enable_regmap, 18206c4998bSAxel Lin .disable = regulator_disable_regmap, 18306c4998bSAxel Lin .is_enabled = regulator_is_enabled_regmap, 184452534e5SVenu Byravarasu }; 185452534e5SVenu Byravarasu 186ed11f1eaSDoug Anderson static struct regulator_ops tps65090_fet_control_ops = { 187ed11f1eaSDoug Anderson .enable = tps65090_fet_enable, 188ed11f1eaSDoug Anderson .disable = regulator_disable_regmap, 189ed11f1eaSDoug Anderson .is_enabled = regulator_is_enabled_regmap, 190ed11f1eaSDoug Anderson }; 191ed11f1eaSDoug Anderson 1923a81ef8cSLaxman Dewangan static struct regulator_ops tps65090_ldo_ops = { 1933a81ef8cSLaxman Dewangan }; 1943a81ef8cSLaxman Dewangan 1954f2352cfSJavier Martinez Canillas #define tps65090_REG_DESC(_id, _sname, _en_reg, _en_bits, _nvolt, _volt, _ops) \ 196452534e5SVenu Byravarasu { \ 19724282a1cSLaxman Dewangan .name = "TPS65090_RAILS"#_id, \ 19824282a1cSLaxman Dewangan .supply_name = _sname, \ 1998620ca9fSLaxman Dewangan .id = TPS65090_REGULATOR_##_id, \ 2004f2352cfSJavier Martinez Canillas .n_voltages = _nvolt, \ 20124282a1cSLaxman Dewangan .ops = &_ops, \ 2024f2352cfSJavier Martinez Canillas .fixed_uV = _volt, \ 20324282a1cSLaxman Dewangan .enable_reg = _en_reg, \ 204ed11f1eaSDoug Anderson .enable_val = _en_bits, \ 205ed11f1eaSDoug Anderson .enable_mask = _en_bits, \ 206452534e5SVenu Byravarasu .type = REGULATOR_VOLTAGE, \ 207452534e5SVenu Byravarasu .owner = THIS_MODULE, \ 208452534e5SVenu Byravarasu } 209452534e5SVenu Byravarasu 2104f2352cfSJavier Martinez Canillas #define tps65090_REG_FIXEDV(_id, _sname, en_reg, _en_bits, _volt, _ops) \ 2114f2352cfSJavier Martinez Canillas tps65090_REG_DESC(_id, _sname, en_reg, _en_bits, 1, _volt, _ops) 2124f2352cfSJavier Martinez Canillas 2134f2352cfSJavier Martinez Canillas #define tps65090_REG_SWITCH(_id, _sname, en_reg, _en_bits, _ops) \ 2144f2352cfSJavier Martinez Canillas tps65090_REG_DESC(_id, _sname, en_reg, _en_bits, 0, 0, _ops) 2154f2352cfSJavier Martinez Canillas 21624282a1cSLaxman Dewangan static struct regulator_desc tps65090_regulator_desc[] = { 2174f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(DCDC1, "vsys1", 0x0C, BIT(CTRL_EN_BIT), 5000000, 218ed11f1eaSDoug Anderson tps65090_reg_control_ops), 2194f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(DCDC2, "vsys2", 0x0D, BIT(CTRL_EN_BIT), 3300000, 220ed11f1eaSDoug Anderson tps65090_reg_control_ops), 2214f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(DCDC3, "vsys3", 0x0E, BIT(CTRL_EN_BIT), 222ed11f1eaSDoug Anderson tps65090_reg_control_ops), 223ed11f1eaSDoug Anderson 2244f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET1, "infet1", 0x0F, 225ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 226ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2274f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET2, "infet2", 0x10, 228ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 229ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2304f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET3, "infet3", 0x11, 231ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 232ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2334f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET4, "infet4", 0x12, 234ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 235ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2364f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET5, "infet5", 0x13, 237ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 238ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2394f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET6, "infet6", 0x14, 240ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 241ed11f1eaSDoug Anderson tps65090_fet_control_ops), 2424f2352cfSJavier Martinez Canillas tps65090_REG_SWITCH(FET7, "infet7", 0x15, 243ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 244ed11f1eaSDoug Anderson tps65090_fet_control_ops), 245ed11f1eaSDoug Anderson 2464f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(LDO1, "vsys-l1", 0, 0, 5000000, 247ed11f1eaSDoug Anderson tps65090_ldo_ops), 2484f2352cfSJavier Martinez Canillas tps65090_REG_FIXEDV(LDO2, "vsys-l2", 0, 0, 3300000, 249ed11f1eaSDoug Anderson tps65090_ldo_ops), 250452534e5SVenu Byravarasu }; 251452534e5SVenu Byravarasu 25224282a1cSLaxman Dewangan static inline bool is_dcdc(int id) 253452534e5SVenu Byravarasu { 25424282a1cSLaxman Dewangan switch (id) { 2558620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC1: 2568620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC2: 2578620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC3: 25824282a1cSLaxman Dewangan return true; 25924282a1cSLaxman Dewangan default: 26024282a1cSLaxman Dewangan return false; 261452534e5SVenu Byravarasu } 26224282a1cSLaxman Dewangan } 26324282a1cSLaxman Dewangan 264a5023574SBill Pemberton static int tps65090_config_ext_control( 26524282a1cSLaxman Dewangan struct tps65090_regulator *ri, bool enable) 26624282a1cSLaxman Dewangan { 26724282a1cSLaxman Dewangan int ret; 26824282a1cSLaxman Dewangan struct device *parent = ri->dev->parent; 26924282a1cSLaxman Dewangan unsigned int reg_en_reg = ri->desc->enable_reg; 27024282a1cSLaxman Dewangan 27124282a1cSLaxman Dewangan if (enable) 27224282a1cSLaxman Dewangan ret = tps65090_set_bits(parent, reg_en_reg, 1); 27324282a1cSLaxman Dewangan else 27424282a1cSLaxman Dewangan ret = tps65090_clr_bits(parent, reg_en_reg, 1); 27524282a1cSLaxman Dewangan if (ret < 0) 27624282a1cSLaxman Dewangan dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg); 27724282a1cSLaxman Dewangan return ret; 27824282a1cSLaxman Dewangan } 27924282a1cSLaxman Dewangan 280a5023574SBill Pemberton static int tps65090_regulator_disable_ext_control( 28124282a1cSLaxman Dewangan struct tps65090_regulator *ri, 28224282a1cSLaxman Dewangan struct tps65090_regulator_plat_data *tps_pdata) 28324282a1cSLaxman Dewangan { 28424282a1cSLaxman Dewangan int ret = 0; 28524282a1cSLaxman Dewangan struct device *parent = ri->dev->parent; 28624282a1cSLaxman Dewangan unsigned int reg_en_reg = ri->desc->enable_reg; 28724282a1cSLaxman Dewangan 28824282a1cSLaxman Dewangan /* 28924282a1cSLaxman Dewangan * First enable output for internal control if require. 29024282a1cSLaxman Dewangan * And then disable external control. 29124282a1cSLaxman Dewangan */ 29224282a1cSLaxman Dewangan if (tps_pdata->reg_init_data->constraints.always_on || 29324282a1cSLaxman Dewangan tps_pdata->reg_init_data->constraints.boot_on) { 29424282a1cSLaxman Dewangan ret = tps65090_set_bits(parent, reg_en_reg, 0); 29524282a1cSLaxman Dewangan if (ret < 0) { 29624282a1cSLaxman Dewangan dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg); 29724282a1cSLaxman Dewangan return ret; 29824282a1cSLaxman Dewangan } 29924282a1cSLaxman Dewangan } 30024282a1cSLaxman Dewangan return tps65090_config_ext_control(ri, false); 301452534e5SVenu Byravarasu } 302452534e5SVenu Byravarasu 3036c7a7a0eSLaxman Dewangan #ifdef CONFIG_OF 3046c7a7a0eSLaxman Dewangan static struct of_regulator_match tps65090_matches[] = { 3056c7a7a0eSLaxman Dewangan { .name = "dcdc1", }, 3066c7a7a0eSLaxman Dewangan { .name = "dcdc2", }, 3076c7a7a0eSLaxman Dewangan { .name = "dcdc3", }, 3086c7a7a0eSLaxman Dewangan { .name = "fet1", }, 3096c7a7a0eSLaxman Dewangan { .name = "fet2", }, 3106c7a7a0eSLaxman Dewangan { .name = "fet3", }, 3116c7a7a0eSLaxman Dewangan { .name = "fet4", }, 3126c7a7a0eSLaxman Dewangan { .name = "fet5", }, 3136c7a7a0eSLaxman Dewangan { .name = "fet6", }, 3146c7a7a0eSLaxman Dewangan { .name = "fet7", }, 3156c7a7a0eSLaxman Dewangan { .name = "ldo1", }, 3166c7a7a0eSLaxman Dewangan { .name = "ldo2", }, 3176c7a7a0eSLaxman Dewangan }; 3186c7a7a0eSLaxman Dewangan 3196c7a7a0eSLaxman Dewangan static struct tps65090_platform_data *tps65090_parse_dt_reg_data( 3206c7a7a0eSLaxman Dewangan struct platform_device *pdev, 3216c7a7a0eSLaxman Dewangan struct of_regulator_match **tps65090_reg_matches) 3226c7a7a0eSLaxman Dewangan { 3236c7a7a0eSLaxman Dewangan struct tps65090_platform_data *tps65090_pdata; 3246c7a7a0eSLaxman Dewangan struct device_node *np = pdev->dev.parent->of_node; 3256c7a7a0eSLaxman Dewangan struct device_node *regulators; 3266c7a7a0eSLaxman Dewangan int idx = 0, ret; 3276c7a7a0eSLaxman Dewangan struct tps65090_regulator_plat_data *reg_pdata; 3286c7a7a0eSLaxman Dewangan 3296c7a7a0eSLaxman Dewangan tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata), 3306c7a7a0eSLaxman Dewangan GFP_KERNEL); 3310ad91c69SSachin Kamat if (!tps65090_pdata) 3326c7a7a0eSLaxman Dewangan return ERR_PTR(-ENOMEM); 3336c7a7a0eSLaxman Dewangan 334a86854d0SKees Cook reg_pdata = devm_kcalloc(&pdev->dev, 335a86854d0SKees Cook TPS65090_REGULATOR_MAX, sizeof(*reg_pdata), 336a86854d0SKees Cook GFP_KERNEL); 3370ad91c69SSachin Kamat if (!reg_pdata) 3386c7a7a0eSLaxman Dewangan return ERR_PTR(-ENOMEM); 3396c7a7a0eSLaxman Dewangan 3404c850eadSLaxman Dewangan regulators = of_get_child_by_name(np, "regulators"); 3416c7a7a0eSLaxman Dewangan if (!regulators) { 3426c7a7a0eSLaxman Dewangan dev_err(&pdev->dev, "regulator node not found\n"); 3436c7a7a0eSLaxman Dewangan return ERR_PTR(-ENODEV); 3446c7a7a0eSLaxman Dewangan } 3456c7a7a0eSLaxman Dewangan 34609a228e7SAxel Lin ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches, 3476c7a7a0eSLaxman Dewangan ARRAY_SIZE(tps65090_matches)); 348026cdfe6SSachin Kamat of_node_put(regulators); 3496c7a7a0eSLaxman Dewangan if (ret < 0) { 3506c7a7a0eSLaxman Dewangan dev_err(&pdev->dev, 3516c7a7a0eSLaxman Dewangan "Error parsing regulator init data: %d\n", ret); 3526c7a7a0eSLaxman Dewangan return ERR_PTR(ret); 3536c7a7a0eSLaxman Dewangan } 3546c7a7a0eSLaxman Dewangan 3556c7a7a0eSLaxman Dewangan *tps65090_reg_matches = tps65090_matches; 3566c7a7a0eSLaxman Dewangan for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) { 3576c7a7a0eSLaxman Dewangan struct regulator_init_data *ri_data; 3586c7a7a0eSLaxman Dewangan struct tps65090_regulator_plat_data *rpdata; 3596c7a7a0eSLaxman Dewangan 3606c7a7a0eSLaxman Dewangan rpdata = ®_pdata[idx]; 3616c7a7a0eSLaxman Dewangan ri_data = tps65090_matches[idx].init_data; 3626c7a7a0eSLaxman Dewangan if (!ri_data || !tps65090_matches[idx].of_node) 3636c7a7a0eSLaxman Dewangan continue; 3646c7a7a0eSLaxman Dewangan 3656c7a7a0eSLaxman Dewangan rpdata->reg_init_data = ri_data; 3666c7a7a0eSLaxman Dewangan rpdata->enable_ext_control = of_property_read_bool( 3676c7a7a0eSLaxman Dewangan tps65090_matches[idx].of_node, 3686c7a7a0eSLaxman Dewangan "ti,enable-ext-control"); 3693012e814SLinus Walleij if (rpdata->enable_ext_control) { 3703012e814SLinus Walleij enum gpiod_flags gflags; 3713012e814SLinus Walleij 3723012e814SLinus Walleij if (ri_data->constraints.always_on || 3733012e814SLinus Walleij ri_data->constraints.boot_on) 3743012e814SLinus Walleij gflags = GPIOD_OUT_HIGH; 3753012e814SLinus Walleij else 3763012e814SLinus Walleij gflags = GPIOD_OUT_LOW; 37763239e4bSLinus Walleij gflags |= GPIOD_FLAGS_BIT_NONEXCLUSIVE; 3783012e814SLinus Walleij 3793012e814SLinus Walleij rpdata->gpiod = devm_gpiod_get_from_of_node(&pdev->dev, 3803012e814SLinus Walleij tps65090_matches[idx].of_node, 3813012e814SLinus Walleij "dcdc-ext-control-gpios", 0, 3823012e814SLinus Walleij gflags, 3833012e814SLinus Walleij "tps65090"); 3843012e814SLinus Walleij if (IS_ERR(rpdata->gpiod)) 3853012e814SLinus Walleij return ERR_CAST(rpdata->gpiod); 3863012e814SLinus Walleij if (!rpdata->gpiod) 3873012e814SLinus Walleij dev_err(&pdev->dev, 3883012e814SLinus Walleij "could not find DCDC external control GPIO\n"); 3893012e814SLinus Walleij } 3906c7a7a0eSLaxman Dewangan 39129041449SDoug Anderson if (of_property_read_u32(tps65090_matches[idx].of_node, 39229041449SDoug Anderson "ti,overcurrent-wait", 39329041449SDoug Anderson &rpdata->overcurrent_wait) == 0) 39429041449SDoug Anderson rpdata->overcurrent_wait_valid = true; 39529041449SDoug Anderson 3966c7a7a0eSLaxman Dewangan tps65090_pdata->reg_pdata[idx] = rpdata; 3976c7a7a0eSLaxman Dewangan } 3986c7a7a0eSLaxman Dewangan return tps65090_pdata; 3996c7a7a0eSLaxman Dewangan } 4006c7a7a0eSLaxman Dewangan #else 4016c7a7a0eSLaxman Dewangan static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data( 4026c7a7a0eSLaxman Dewangan struct platform_device *pdev, 4036c7a7a0eSLaxman Dewangan struct of_regulator_match **tps65090_reg_matches) 4046c7a7a0eSLaxman Dewangan { 4056c7a7a0eSLaxman Dewangan *tps65090_reg_matches = NULL; 4066c7a7a0eSLaxman Dewangan return NULL; 4076c7a7a0eSLaxman Dewangan } 4086c7a7a0eSLaxman Dewangan #endif 4096c7a7a0eSLaxman Dewangan 410a5023574SBill Pemberton static int tps65090_regulator_probe(struct platform_device *pdev) 411452534e5SVenu Byravarasu { 41206c4998bSAxel Lin struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent); 413452534e5SVenu Byravarasu struct tps65090_regulator *ri = NULL; 414c172708dSMark Brown struct regulator_config config = { }; 415452534e5SVenu Byravarasu struct regulator_dev *rdev; 41624282a1cSLaxman Dewangan struct tps65090_regulator_plat_data *tps_pdata; 41724282a1cSLaxman Dewangan struct tps65090_regulator *pmic; 41824282a1cSLaxman Dewangan struct tps65090_platform_data *tps65090_pdata; 4196c7a7a0eSLaxman Dewangan struct of_regulator_match *tps65090_reg_matches = NULL; 42024282a1cSLaxman Dewangan int num; 42124282a1cSLaxman Dewangan int ret; 422452534e5SVenu Byravarasu 42324282a1cSLaxman Dewangan dev_dbg(&pdev->dev, "Probing regulator\n"); 424452534e5SVenu Byravarasu 42524282a1cSLaxman Dewangan tps65090_pdata = dev_get_platdata(pdev->dev.parent); 4266c7a7a0eSLaxman Dewangan if (!tps65090_pdata && tps65090_mfd->dev->of_node) 4276c7a7a0eSLaxman Dewangan tps65090_pdata = tps65090_parse_dt_reg_data(pdev, 4286c7a7a0eSLaxman Dewangan &tps65090_reg_matches); 4296c7a7a0eSLaxman Dewangan if (IS_ERR_OR_NULL(tps65090_pdata)) { 43024282a1cSLaxman Dewangan dev_err(&pdev->dev, "Platform data missing\n"); 4316c7a7a0eSLaxman Dewangan return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL; 432452534e5SVenu Byravarasu } 433452534e5SVenu Byravarasu 434a86854d0SKees Cook pmic = devm_kcalloc(&pdev->dev, 435a86854d0SKees Cook TPS65090_REGULATOR_MAX, sizeof(*pmic), 43624282a1cSLaxman Dewangan GFP_KERNEL); 4370ad91c69SSachin Kamat if (!pmic) 43824282a1cSLaxman Dewangan return -ENOMEM; 439452534e5SVenu Byravarasu 4408620ca9fSLaxman Dewangan for (num = 0; num < TPS65090_REGULATOR_MAX; num++) { 44124282a1cSLaxman Dewangan tps_pdata = tps65090_pdata->reg_pdata[num]; 44224282a1cSLaxman Dewangan 44324282a1cSLaxman Dewangan ri = &pmic[num]; 44424282a1cSLaxman Dewangan ri->dev = &pdev->dev; 44524282a1cSLaxman Dewangan ri->desc = &tps65090_regulator_desc[num]; 446c122c5b6SDoug Anderson if (tps_pdata) { 447c122c5b6SDoug Anderson ri->overcurrent_wait_valid = 448c122c5b6SDoug Anderson tps_pdata->overcurrent_wait_valid; 44929041449SDoug Anderson ri->overcurrent_wait = tps_pdata->overcurrent_wait; 450c122c5b6SDoug Anderson } 45124282a1cSLaxman Dewangan 45224282a1cSLaxman Dewangan /* 45324282a1cSLaxman Dewangan * TPS5090 DCDC support the control from external digital input. 454f329b175SLaxman Dewangan * Configure it as per platform data. 45524282a1cSLaxman Dewangan */ 45624282a1cSLaxman Dewangan if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) { 457f329b175SLaxman Dewangan if (tps_pdata->enable_ext_control) { 4583012e814SLinus Walleij config.ena_gpiod = tps_pdata->gpiod; 459f329b175SLaxman Dewangan ri->desc->ops = &tps65090_ext_control_ops; 460f329b175SLaxman Dewangan } else { 46124282a1cSLaxman Dewangan ret = tps65090_regulator_disable_ext_control( 46224282a1cSLaxman Dewangan ri, tps_pdata); 46324282a1cSLaxman Dewangan if (ret < 0) { 46424282a1cSLaxman Dewangan dev_err(&pdev->dev, 46524282a1cSLaxman Dewangan "failed disable ext control\n"); 4669738efaeSSachin Kamat return ret; 46724282a1cSLaxman Dewangan } 46824282a1cSLaxman Dewangan } 469f329b175SLaxman Dewangan } 470f329b175SLaxman Dewangan 4716c7a7a0eSLaxman Dewangan config.dev = pdev->dev.parent; 47224282a1cSLaxman Dewangan config.driver_data = ri; 47324282a1cSLaxman Dewangan config.regmap = tps65090_mfd->rmap; 47424282a1cSLaxman Dewangan if (tps_pdata) 47524282a1cSLaxman Dewangan config.init_data = tps_pdata->reg_init_data; 47624282a1cSLaxman Dewangan else 47724282a1cSLaxman Dewangan config.init_data = NULL; 4786c7a7a0eSLaxman Dewangan if (tps65090_reg_matches) 4796c7a7a0eSLaxman Dewangan config.of_node = tps65090_reg_matches[num].of_node; 4806c7a7a0eSLaxman Dewangan else 4816c7a7a0eSLaxman Dewangan config.of_node = NULL; 48224282a1cSLaxman Dewangan 4839738efaeSSachin Kamat rdev = devm_regulator_register(&pdev->dev, ri->desc, &config); 48424282a1cSLaxman Dewangan if (IS_ERR(rdev)) { 48524282a1cSLaxman Dewangan dev_err(&pdev->dev, "failed to register regulator %s\n", 48624282a1cSLaxman Dewangan ri->desc->name); 4879738efaeSSachin Kamat return PTR_ERR(rdev); 48824282a1cSLaxman Dewangan } 48924282a1cSLaxman Dewangan ri->rdev = rdev; 490f329b175SLaxman Dewangan 49129041449SDoug Anderson if (ri->overcurrent_wait_valid) { 49229041449SDoug Anderson ret = tps65090_reg_set_overcurrent_wait(ri, rdev); 49329041449SDoug Anderson if (ret < 0) 49429041449SDoug Anderson return ret; 49529041449SDoug Anderson } 49629041449SDoug Anderson 497f329b175SLaxman Dewangan /* Enable external control if it is require */ 498f329b175SLaxman Dewangan if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data && 499f329b175SLaxman Dewangan tps_pdata->enable_ext_control) { 500f329b175SLaxman Dewangan ret = tps65090_config_ext_control(ri, true); 5019738efaeSSachin Kamat if (ret < 0) 5029738efaeSSachin Kamat return ret; 503f329b175SLaxman Dewangan } 50424282a1cSLaxman Dewangan } 50524282a1cSLaxman Dewangan 50624282a1cSLaxman Dewangan platform_set_drvdata(pdev, pmic); 507452534e5SVenu Byravarasu return 0; 508452534e5SVenu Byravarasu } 509452534e5SVenu Byravarasu 510452534e5SVenu Byravarasu static struct platform_driver tps65090_regulator_driver = { 511452534e5SVenu Byravarasu .driver = { 5128620ca9fSLaxman Dewangan .name = "tps65090-pmic", 513452534e5SVenu Byravarasu }, 514452534e5SVenu Byravarasu .probe = tps65090_regulator_probe, 515452534e5SVenu Byravarasu }; 516452534e5SVenu Byravarasu 517452534e5SVenu Byravarasu static int __init tps65090_regulator_init(void) 518452534e5SVenu Byravarasu { 519452534e5SVenu Byravarasu return platform_driver_register(&tps65090_regulator_driver); 520452534e5SVenu Byravarasu } 521452534e5SVenu Byravarasu subsys_initcall(tps65090_regulator_init); 522452534e5SVenu Byravarasu 523452534e5SVenu Byravarasu static void __exit tps65090_regulator_exit(void) 524452534e5SVenu Byravarasu { 525452534e5SVenu Byravarasu platform_driver_unregister(&tps65090_regulator_driver); 526452534e5SVenu Byravarasu } 527452534e5SVenu Byravarasu module_exit(tps65090_regulator_exit); 528452534e5SVenu Byravarasu 529452534e5SVenu Byravarasu MODULE_DESCRIPTION("tps65090 regulator driver"); 530452534e5SVenu Byravarasu MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); 531452534e5SVenu Byravarasu MODULE_LICENSE("GPL v2"); 532d95420b8SAxel Lin MODULE_ALIAS("platform:tps65090-pmic"); 533