// SPDX-License-Identifier: GPL-2.0-only /* * Regulator driver for tps65090 power management chip. * * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved. */ #include <linux/module.h> #include <linux/delay.h> #include <linux/init.h> #include <linux/of.h> #include <linux/gpio/consumer.h> #include <linux/slab.h> #include <linux/err.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/tps65090.h> #define MAX_CTRL_READ_TRIES … #define MAX_FET_ENABLE_TRIES … #define CTRL_EN_BIT … #define CTRL_WT_BIT … #define CTRL_PG_BIT … #define CTRL_TO_BIT … #define MAX_OVERCURRENT_WAIT … /** * struct tps65090_regulator - Per-regulator data for a tps65090 regulator * * @dev: Pointer to our device. * @desc: The struct regulator_desc for the regulator. * @rdev: The struct regulator_dev for the regulator. * @overcurrent_wait_valid: True if overcurrent_wait is valid. * @overcurrent_wait: For FETs, the value to put in the WTFET bitfield. */ struct tps65090_regulator { … }; static const struct regulator_ops tps65090_ext_control_ops = …; /** * tps65090_reg_set_overcurrent_wait - Setup overcurrent wait * * This will set the overcurrent wait time based on what's in the regulator * info. * * @ri: Overall regulator data * @rdev: Regulator device * * Return: 0 if no error, non-zero if there was an error writing the register. */ static int tps65090_reg_set_overcurrent_wait(struct tps65090_regulator *ri, struct regulator_dev *rdev) { … } /** * tps65090_try_enable_fet - Try to enable a FET * * @rdev: Regulator device * * Return: 0 if ok, -ENOTRECOVERABLE if the FET power good bit did not get * set, or some other -ve value if another error occurred (e.g. i2c error) */ static int tps65090_try_enable_fet(struct regulator_dev *rdev) { … } /** * tps65090_fet_enable - Enable a FET, trying a few times if it fails * * Some versions of the tps65090 have issues when turning on the FETs. * This function goes through several steps to ensure the best chance of the * FET going on. Specifically: * - We'll make sure that we bump the "overcurrent wait" to the maximum, which * increases the chances that we'll turn on properly. * - We'll retry turning the FET on multiple times (turning off in between). * * @rdev: Regulator device * * Return: 0 if ok, non-zero if it fails. */ static int tps65090_fet_enable(struct regulator_dev *rdev) { … } static const struct regulator_ops tps65090_reg_control_ops = …; static const struct regulator_ops tps65090_fet_control_ops = …; static const struct regulator_ops tps65090_ldo_ops = …; #define tps65090_REG_DESC(_id, _sname, _en_reg, _en_bits, _nvolt, _volt, _ops) … #define tps65090_REG_FIXEDV(_id, _sname, en_reg, _en_bits, _volt, _ops) … #define tps65090_REG_SWITCH(_id, _sname, en_reg, _en_bits, _ops) … static struct regulator_desc tps65090_regulator_desc[] = …; static inline bool is_dcdc(int id) { … } static int tps65090_config_ext_control( struct tps65090_regulator *ri, bool enable) { … } static int tps65090_regulator_disable_ext_control( struct tps65090_regulator *ri, struct tps65090_regulator_plat_data *tps_pdata) { … } #ifdef CONFIG_OF static struct of_regulator_match tps65090_matches[] = …; static struct tps65090_platform_data *tps65090_parse_dt_reg_data( struct platform_device *pdev, struct of_regulator_match **tps65090_reg_matches) { … } #else static inline struct tps65090_platform_data *tps65090_parse_dt_reg_data( struct platform_device *pdev, struct of_regulator_match **tps65090_reg_matches) { *tps65090_reg_matches = NULL; return NULL; } #endif static int tps65090_regulator_probe(struct platform_device *pdev) { … } static struct platform_driver tps65090_regulator_driver = …; static int __init tps65090_regulator_init(void) { … } subsys_initcall(tps65090_regulator_init); static void __exit tps65090_regulator_exit(void) { … } module_exit(tps65090_regulator_exit); MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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