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> 22f329b175SLaxman Dewangan #include <linux/gpio.h> 236c7a7a0eSLaxman Dewangan #include <linux/of_gpio.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 195ed11f1eaSDoug Anderson #define tps65090_REG_DESC(_id, _sname, _en_reg, _en_bits, _ops) \ 196452534e5SVenu Byravarasu { \ 19724282a1cSLaxman Dewangan .name = "TPS65090_RAILS"#_id, \ 19824282a1cSLaxman Dewangan .supply_name = _sname, \ 1998620ca9fSLaxman Dewangan .id = TPS65090_REGULATOR_##_id, \ 20024282a1cSLaxman Dewangan .ops = &_ops, \ 20124282a1cSLaxman Dewangan .enable_reg = _en_reg, \ 202ed11f1eaSDoug Anderson .enable_val = _en_bits, \ 203ed11f1eaSDoug Anderson .enable_mask = _en_bits, \ 204452534e5SVenu Byravarasu .type = REGULATOR_VOLTAGE, \ 205452534e5SVenu Byravarasu .owner = THIS_MODULE, \ 206452534e5SVenu Byravarasu } 207452534e5SVenu Byravarasu 20824282a1cSLaxman Dewangan static struct regulator_desc tps65090_regulator_desc[] = { 209ed11f1eaSDoug Anderson tps65090_REG_DESC(DCDC1, "vsys1", 0x0C, BIT(CTRL_EN_BIT), 210ed11f1eaSDoug Anderson tps65090_reg_control_ops), 211ed11f1eaSDoug Anderson tps65090_REG_DESC(DCDC2, "vsys2", 0x0D, BIT(CTRL_EN_BIT), 212ed11f1eaSDoug Anderson tps65090_reg_control_ops), 213ed11f1eaSDoug Anderson tps65090_REG_DESC(DCDC3, "vsys3", 0x0E, BIT(CTRL_EN_BIT), 214ed11f1eaSDoug Anderson tps65090_reg_control_ops), 215ed11f1eaSDoug Anderson 216ed11f1eaSDoug Anderson tps65090_REG_DESC(FET1, "infet1", 0x0F, 217ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 218ed11f1eaSDoug Anderson tps65090_fet_control_ops), 219ed11f1eaSDoug Anderson tps65090_REG_DESC(FET2, "infet2", 0x10, 220ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 221ed11f1eaSDoug Anderson tps65090_fet_control_ops), 222ed11f1eaSDoug Anderson tps65090_REG_DESC(FET3, "infet3", 0x11, 223ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 224ed11f1eaSDoug Anderson tps65090_fet_control_ops), 225ed11f1eaSDoug Anderson tps65090_REG_DESC(FET4, "infet4", 0x12, 226ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 227ed11f1eaSDoug Anderson tps65090_fet_control_ops), 228ed11f1eaSDoug Anderson tps65090_REG_DESC(FET5, "infet5", 0x13, 229ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 230ed11f1eaSDoug Anderson tps65090_fet_control_ops), 231ed11f1eaSDoug Anderson tps65090_REG_DESC(FET6, "infet6", 0x14, 232ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 233ed11f1eaSDoug Anderson tps65090_fet_control_ops), 234ed11f1eaSDoug Anderson tps65090_REG_DESC(FET7, "infet7", 0x15, 235ed11f1eaSDoug Anderson BIT(CTRL_EN_BIT) | BIT(CTRL_PG_BIT), 236ed11f1eaSDoug Anderson tps65090_fet_control_ops), 237ed11f1eaSDoug Anderson 238ed11f1eaSDoug Anderson tps65090_REG_DESC(LDO1, "vsys-l1", 0, 0, 239ed11f1eaSDoug Anderson tps65090_ldo_ops), 240ed11f1eaSDoug Anderson tps65090_REG_DESC(LDO2, "vsys-l2", 0, 0, 241ed11f1eaSDoug Anderson tps65090_ldo_ops), 242452534e5SVenu Byravarasu }; 243452534e5SVenu Byravarasu 24424282a1cSLaxman Dewangan static inline bool is_dcdc(int id) 245452534e5SVenu Byravarasu { 24624282a1cSLaxman Dewangan switch (id) { 2478620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC1: 2488620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC2: 2498620ca9fSLaxman Dewangan case TPS65090_REGULATOR_DCDC3: 25024282a1cSLaxman Dewangan return true; 25124282a1cSLaxman Dewangan default: 25224282a1cSLaxman Dewangan return false; 253452534e5SVenu Byravarasu } 25424282a1cSLaxman Dewangan } 25524282a1cSLaxman Dewangan 256a5023574SBill Pemberton static int tps65090_config_ext_control( 25724282a1cSLaxman Dewangan struct tps65090_regulator *ri, bool enable) 25824282a1cSLaxman Dewangan { 25924282a1cSLaxman Dewangan int ret; 26024282a1cSLaxman Dewangan struct device *parent = ri->dev->parent; 26124282a1cSLaxman Dewangan unsigned int reg_en_reg = ri->desc->enable_reg; 26224282a1cSLaxman Dewangan 26324282a1cSLaxman Dewangan if (enable) 26424282a1cSLaxman Dewangan ret = tps65090_set_bits(parent, reg_en_reg, 1); 26524282a1cSLaxman Dewangan else 26624282a1cSLaxman Dewangan ret = tps65090_clr_bits(parent, reg_en_reg, 1); 26724282a1cSLaxman Dewangan if (ret < 0) 26824282a1cSLaxman Dewangan dev_err(ri->dev, "Error in updating reg 0x%x\n", reg_en_reg); 26924282a1cSLaxman Dewangan return ret; 27024282a1cSLaxman Dewangan } 27124282a1cSLaxman Dewangan 272a5023574SBill Pemberton static int tps65090_regulator_disable_ext_control( 27324282a1cSLaxman Dewangan struct tps65090_regulator *ri, 27424282a1cSLaxman Dewangan struct tps65090_regulator_plat_data *tps_pdata) 27524282a1cSLaxman Dewangan { 27624282a1cSLaxman Dewangan int ret = 0; 27724282a1cSLaxman Dewangan struct device *parent = ri->dev->parent; 27824282a1cSLaxman Dewangan unsigned int reg_en_reg = ri->desc->enable_reg; 27924282a1cSLaxman Dewangan 28024282a1cSLaxman Dewangan /* 28124282a1cSLaxman Dewangan * First enable output for internal control if require. 28224282a1cSLaxman Dewangan * And then disable external control. 28324282a1cSLaxman Dewangan */ 28424282a1cSLaxman Dewangan if (tps_pdata->reg_init_data->constraints.always_on || 28524282a1cSLaxman Dewangan tps_pdata->reg_init_data->constraints.boot_on) { 28624282a1cSLaxman Dewangan ret = tps65090_set_bits(parent, reg_en_reg, 0); 28724282a1cSLaxman Dewangan if (ret < 0) { 28824282a1cSLaxman Dewangan dev_err(ri->dev, "Error in set reg 0x%x\n", reg_en_reg); 28924282a1cSLaxman Dewangan return ret; 29024282a1cSLaxman Dewangan } 29124282a1cSLaxman Dewangan } 29224282a1cSLaxman Dewangan return tps65090_config_ext_control(ri, false); 293452534e5SVenu Byravarasu } 294452534e5SVenu Byravarasu 295a5023574SBill Pemberton static void tps65090_configure_regulator_config( 296f329b175SLaxman Dewangan struct tps65090_regulator_plat_data *tps_pdata, 297f329b175SLaxman Dewangan struct regulator_config *config) 298f329b175SLaxman Dewangan { 299f329b175SLaxman Dewangan if (gpio_is_valid(tps_pdata->gpio)) { 300f329b175SLaxman Dewangan int gpio_flag = GPIOF_OUT_INIT_LOW; 301f329b175SLaxman Dewangan 302f329b175SLaxman Dewangan if (tps_pdata->reg_init_data->constraints.always_on || 303f329b175SLaxman Dewangan tps_pdata->reg_init_data->constraints.boot_on) 304f329b175SLaxman Dewangan gpio_flag = GPIOF_OUT_INIT_HIGH; 305f329b175SLaxman Dewangan 306f329b175SLaxman Dewangan config->ena_gpio = tps_pdata->gpio; 307f329b175SLaxman Dewangan config->ena_gpio_flags = gpio_flag; 308f329b175SLaxman Dewangan } 309f329b175SLaxman Dewangan } 310f329b175SLaxman Dewangan 3116c7a7a0eSLaxman Dewangan #ifdef CONFIG_OF 3126c7a7a0eSLaxman Dewangan static struct of_regulator_match tps65090_matches[] = { 3136c7a7a0eSLaxman Dewangan { .name = "dcdc1", }, 3146c7a7a0eSLaxman Dewangan { .name = "dcdc2", }, 3156c7a7a0eSLaxman Dewangan { .name = "dcdc3", }, 3166c7a7a0eSLaxman Dewangan { .name = "fet1", }, 3176c7a7a0eSLaxman Dewangan { .name = "fet2", }, 3186c7a7a0eSLaxman Dewangan { .name = "fet3", }, 3196c7a7a0eSLaxman Dewangan { .name = "fet4", }, 3206c7a7a0eSLaxman Dewangan { .name = "fet5", }, 3216c7a7a0eSLaxman Dewangan { .name = "fet6", }, 3226c7a7a0eSLaxman Dewangan { .name = "fet7", }, 3236c7a7a0eSLaxman Dewangan { .name = "ldo1", }, 3246c7a7a0eSLaxman Dewangan { .name = "ldo2", }, 3256c7a7a0eSLaxman Dewangan }; 3266c7a7a0eSLaxman Dewangan 3276c7a7a0eSLaxman Dewangan static struct tps65090_platform_data *tps65090_parse_dt_reg_data( 3286c7a7a0eSLaxman Dewangan struct platform_device *pdev, 3296c7a7a0eSLaxman Dewangan struct of_regulator_match **tps65090_reg_matches) 3306c7a7a0eSLaxman Dewangan { 3316c7a7a0eSLaxman Dewangan struct tps65090_platform_data *tps65090_pdata; 3326c7a7a0eSLaxman Dewangan struct device_node *np = pdev->dev.parent->of_node; 3336c7a7a0eSLaxman Dewangan struct device_node *regulators; 3346c7a7a0eSLaxman Dewangan int idx = 0, ret; 3356c7a7a0eSLaxman Dewangan struct tps65090_regulator_plat_data *reg_pdata; 3366c7a7a0eSLaxman Dewangan 3376c7a7a0eSLaxman Dewangan tps65090_pdata = devm_kzalloc(&pdev->dev, sizeof(*tps65090_pdata), 3386c7a7a0eSLaxman Dewangan GFP_KERNEL); 3390ad91c69SSachin Kamat if (!tps65090_pdata) 3406c7a7a0eSLaxman Dewangan return ERR_PTR(-ENOMEM); 3416c7a7a0eSLaxman Dewangan 3426c7a7a0eSLaxman Dewangan reg_pdata = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * 3436c7a7a0eSLaxman Dewangan sizeof(*reg_pdata), GFP_KERNEL); 3440ad91c69SSachin Kamat if (!reg_pdata) 3456c7a7a0eSLaxman Dewangan return ERR_PTR(-ENOMEM); 3466c7a7a0eSLaxman Dewangan 3474c850eadSLaxman Dewangan regulators = of_get_child_by_name(np, "regulators"); 3486c7a7a0eSLaxman Dewangan if (!regulators) { 3496c7a7a0eSLaxman Dewangan dev_err(&pdev->dev, "regulator node not found\n"); 3506c7a7a0eSLaxman Dewangan return ERR_PTR(-ENODEV); 3516c7a7a0eSLaxman Dewangan } 3526c7a7a0eSLaxman Dewangan 35309a228e7SAxel Lin ret = of_regulator_match(&pdev->dev, regulators, tps65090_matches, 3546c7a7a0eSLaxman Dewangan ARRAY_SIZE(tps65090_matches)); 355026cdfe6SSachin Kamat of_node_put(regulators); 3566c7a7a0eSLaxman Dewangan if (ret < 0) { 3576c7a7a0eSLaxman Dewangan dev_err(&pdev->dev, 3586c7a7a0eSLaxman Dewangan "Error parsing regulator init data: %d\n", ret); 3596c7a7a0eSLaxman Dewangan return ERR_PTR(ret); 3606c7a7a0eSLaxman Dewangan } 3616c7a7a0eSLaxman Dewangan 3626c7a7a0eSLaxman Dewangan *tps65090_reg_matches = tps65090_matches; 3636c7a7a0eSLaxman Dewangan for (idx = 0; idx < ARRAY_SIZE(tps65090_matches); idx++) { 3646c7a7a0eSLaxman Dewangan struct regulator_init_data *ri_data; 3656c7a7a0eSLaxman Dewangan struct tps65090_regulator_plat_data *rpdata; 3666c7a7a0eSLaxman Dewangan 3676c7a7a0eSLaxman Dewangan rpdata = ®_pdata[idx]; 3686c7a7a0eSLaxman Dewangan ri_data = tps65090_matches[idx].init_data; 3696c7a7a0eSLaxman Dewangan if (!ri_data || !tps65090_matches[idx].of_node) 3706c7a7a0eSLaxman Dewangan continue; 3716c7a7a0eSLaxman Dewangan 3726c7a7a0eSLaxman Dewangan rpdata->reg_init_data = ri_data; 3736c7a7a0eSLaxman Dewangan rpdata->enable_ext_control = of_property_read_bool( 3746c7a7a0eSLaxman Dewangan tps65090_matches[idx].of_node, 3756c7a7a0eSLaxman Dewangan "ti,enable-ext-control"); 3766c7a7a0eSLaxman Dewangan if (rpdata->enable_ext_control) 3776c7a7a0eSLaxman Dewangan rpdata->gpio = of_get_named_gpio(np, 3786c7a7a0eSLaxman Dewangan "dcdc-ext-control-gpios", 0); 3796c7a7a0eSLaxman Dewangan 38029041449SDoug Anderson if (of_property_read_u32(tps65090_matches[idx].of_node, 38129041449SDoug Anderson "ti,overcurrent-wait", 38229041449SDoug Anderson &rpdata->overcurrent_wait) == 0) 38329041449SDoug Anderson rpdata->overcurrent_wait_valid = true; 38429041449SDoug Anderson 3856c7a7a0eSLaxman Dewangan tps65090_pdata->reg_pdata[idx] = rpdata; 3866c7a7a0eSLaxman Dewangan } 3876c7a7a0eSLaxman Dewangan return tps65090_pdata; 3886c7a7a0eSLaxman Dewangan } 3896c7a7a0eSLaxman Dewangan #else 3906c7a7a0eSLaxman Dewangan static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data( 3916c7a7a0eSLaxman Dewangan struct platform_device *pdev, 3926c7a7a0eSLaxman Dewangan struct of_regulator_match **tps65090_reg_matches) 3936c7a7a0eSLaxman Dewangan { 3946c7a7a0eSLaxman Dewangan *tps65090_reg_matches = NULL; 3956c7a7a0eSLaxman Dewangan return NULL; 3966c7a7a0eSLaxman Dewangan } 3976c7a7a0eSLaxman Dewangan #endif 3986c7a7a0eSLaxman Dewangan 399a5023574SBill Pemberton static int tps65090_regulator_probe(struct platform_device *pdev) 400452534e5SVenu Byravarasu { 40106c4998bSAxel Lin struct tps65090 *tps65090_mfd = dev_get_drvdata(pdev->dev.parent); 402452534e5SVenu Byravarasu struct tps65090_regulator *ri = NULL; 403c172708dSMark Brown struct regulator_config config = { }; 404452534e5SVenu Byravarasu struct regulator_dev *rdev; 40524282a1cSLaxman Dewangan struct tps65090_regulator_plat_data *tps_pdata; 40624282a1cSLaxman Dewangan struct tps65090_regulator *pmic; 40724282a1cSLaxman Dewangan struct tps65090_platform_data *tps65090_pdata; 4086c7a7a0eSLaxman Dewangan struct of_regulator_match *tps65090_reg_matches = NULL; 40924282a1cSLaxman Dewangan int num; 41024282a1cSLaxman Dewangan int ret; 411452534e5SVenu Byravarasu 41224282a1cSLaxman Dewangan dev_dbg(&pdev->dev, "Probing regulator\n"); 413452534e5SVenu Byravarasu 41424282a1cSLaxman Dewangan tps65090_pdata = dev_get_platdata(pdev->dev.parent); 4156c7a7a0eSLaxman Dewangan if (!tps65090_pdata && tps65090_mfd->dev->of_node) 4166c7a7a0eSLaxman Dewangan tps65090_pdata = tps65090_parse_dt_reg_data(pdev, 4176c7a7a0eSLaxman Dewangan &tps65090_reg_matches); 4186c7a7a0eSLaxman Dewangan if (IS_ERR_OR_NULL(tps65090_pdata)) { 41924282a1cSLaxman Dewangan dev_err(&pdev->dev, "Platform data missing\n"); 4206c7a7a0eSLaxman Dewangan return tps65090_pdata ? PTR_ERR(tps65090_pdata) : -EINVAL; 421452534e5SVenu Byravarasu } 422452534e5SVenu Byravarasu 4238620ca9fSLaxman Dewangan pmic = devm_kzalloc(&pdev->dev, TPS65090_REGULATOR_MAX * sizeof(*pmic), 42424282a1cSLaxman Dewangan GFP_KERNEL); 4250ad91c69SSachin Kamat if (!pmic) 42624282a1cSLaxman Dewangan return -ENOMEM; 427452534e5SVenu Byravarasu 4288620ca9fSLaxman Dewangan for (num = 0; num < TPS65090_REGULATOR_MAX; num++) { 42924282a1cSLaxman Dewangan tps_pdata = tps65090_pdata->reg_pdata[num]; 43024282a1cSLaxman Dewangan 43124282a1cSLaxman Dewangan ri = &pmic[num]; 43224282a1cSLaxman Dewangan ri->dev = &pdev->dev; 43324282a1cSLaxman Dewangan ri->desc = &tps65090_regulator_desc[num]; 434c122c5b6SDoug Anderson if (tps_pdata) { 435c122c5b6SDoug Anderson ri->overcurrent_wait_valid = 436c122c5b6SDoug Anderson tps_pdata->overcurrent_wait_valid; 43729041449SDoug Anderson ri->overcurrent_wait = tps_pdata->overcurrent_wait; 438c122c5b6SDoug Anderson } 43924282a1cSLaxman Dewangan 44024282a1cSLaxman Dewangan /* 44124282a1cSLaxman Dewangan * TPS5090 DCDC support the control from external digital input. 442f329b175SLaxman Dewangan * Configure it as per platform data. 44324282a1cSLaxman Dewangan */ 44424282a1cSLaxman Dewangan if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data) { 445f329b175SLaxman Dewangan if (tps_pdata->enable_ext_control) { 446f329b175SLaxman Dewangan tps65090_configure_regulator_config( 447f329b175SLaxman Dewangan tps_pdata, &config); 448f329b175SLaxman Dewangan ri->desc->ops = &tps65090_ext_control_ops; 449f329b175SLaxman Dewangan } else { 45024282a1cSLaxman Dewangan ret = tps65090_regulator_disable_ext_control( 45124282a1cSLaxman Dewangan ri, tps_pdata); 45224282a1cSLaxman Dewangan if (ret < 0) { 45324282a1cSLaxman Dewangan dev_err(&pdev->dev, 45424282a1cSLaxman Dewangan "failed disable ext control\n"); 4559738efaeSSachin Kamat return ret; 45624282a1cSLaxman Dewangan } 45724282a1cSLaxman Dewangan } 458f329b175SLaxman Dewangan } 459f329b175SLaxman Dewangan 4606c7a7a0eSLaxman Dewangan config.dev = pdev->dev.parent; 46124282a1cSLaxman Dewangan config.driver_data = ri; 46224282a1cSLaxman Dewangan config.regmap = tps65090_mfd->rmap; 46324282a1cSLaxman Dewangan if (tps_pdata) 46424282a1cSLaxman Dewangan config.init_data = tps_pdata->reg_init_data; 46524282a1cSLaxman Dewangan else 46624282a1cSLaxman Dewangan config.init_data = NULL; 4676c7a7a0eSLaxman Dewangan if (tps65090_reg_matches) 4686c7a7a0eSLaxman Dewangan config.of_node = tps65090_reg_matches[num].of_node; 4696c7a7a0eSLaxman Dewangan else 4706c7a7a0eSLaxman Dewangan config.of_node = NULL; 47124282a1cSLaxman Dewangan 4729738efaeSSachin Kamat rdev = devm_regulator_register(&pdev->dev, ri->desc, &config); 47324282a1cSLaxman Dewangan if (IS_ERR(rdev)) { 47424282a1cSLaxman Dewangan dev_err(&pdev->dev, "failed to register regulator %s\n", 47524282a1cSLaxman Dewangan ri->desc->name); 4769738efaeSSachin Kamat return PTR_ERR(rdev); 47724282a1cSLaxman Dewangan } 47824282a1cSLaxman Dewangan ri->rdev = rdev; 479f329b175SLaxman Dewangan 48029041449SDoug Anderson if (ri->overcurrent_wait_valid) { 48129041449SDoug Anderson ret = tps65090_reg_set_overcurrent_wait(ri, rdev); 48229041449SDoug Anderson if (ret < 0) 48329041449SDoug Anderson return ret; 48429041449SDoug Anderson } 48529041449SDoug Anderson 486f329b175SLaxman Dewangan /* Enable external control if it is require */ 487f329b175SLaxman Dewangan if (tps_pdata && is_dcdc(num) && tps_pdata->reg_init_data && 488f329b175SLaxman Dewangan tps_pdata->enable_ext_control) { 489f329b175SLaxman Dewangan ret = tps65090_config_ext_control(ri, true); 4909738efaeSSachin Kamat if (ret < 0) 4919738efaeSSachin Kamat return ret; 492f329b175SLaxman Dewangan } 49324282a1cSLaxman Dewangan } 49424282a1cSLaxman Dewangan 49524282a1cSLaxman Dewangan platform_set_drvdata(pdev, pmic); 496452534e5SVenu Byravarasu return 0; 497452534e5SVenu Byravarasu } 498452534e5SVenu Byravarasu 499452534e5SVenu Byravarasu static struct platform_driver tps65090_regulator_driver = { 500452534e5SVenu Byravarasu .driver = { 5018620ca9fSLaxman Dewangan .name = "tps65090-pmic", 502452534e5SVenu Byravarasu .owner = THIS_MODULE, 503452534e5SVenu Byravarasu }, 504452534e5SVenu Byravarasu .probe = tps65090_regulator_probe, 505452534e5SVenu Byravarasu }; 506452534e5SVenu Byravarasu 507452534e5SVenu Byravarasu static int __init tps65090_regulator_init(void) 508452534e5SVenu Byravarasu { 509452534e5SVenu Byravarasu return platform_driver_register(&tps65090_regulator_driver); 510452534e5SVenu Byravarasu } 511452534e5SVenu Byravarasu subsys_initcall(tps65090_regulator_init); 512452534e5SVenu Byravarasu 513452534e5SVenu Byravarasu static void __exit tps65090_regulator_exit(void) 514452534e5SVenu Byravarasu { 515452534e5SVenu Byravarasu platform_driver_unregister(&tps65090_regulator_driver); 516452534e5SVenu Byravarasu } 517452534e5SVenu Byravarasu module_exit(tps65090_regulator_exit); 518452534e5SVenu Byravarasu 519452534e5SVenu Byravarasu MODULE_DESCRIPTION("tps65090 regulator driver"); 520452534e5SVenu Byravarasu MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>"); 521452534e5SVenu Byravarasu MODULE_LICENSE("GPL v2"); 522d95420b8SAxel Lin MODULE_ALIAS("platform:tps65090-pmic"); 523