// SPDX-License-Identifier: GPL-2.0 // // Device driver for regulators in Hi6421 IC // // Copyright (c) <2011-2014> HiSilicon Technologies Co., Ltd. // http://www.hisilicon.com // Copyright (c) <2013-2014> Linaro Ltd. // https://www.linaro.org // // Author: Guodong Xu <[email protected]> #include <linux/slab.h> #include <linux/device.h> #include <linux/module.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/of.h> #include <linux/regmap.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/of_regulator.h> #include <linux/mfd/hi6421-pmic.h> /* * struct hi6421_regulator_pdata - Hi6421 regulator data of platform device * @lock: mutex to serialize regulator enable */ struct hi6421_regulator_pdata { … }; /* * struct hi6421_regulator_info - hi6421 regulator information * @desc: regulator description * @mode_mask: ECO mode bitmask of LDOs; for BUCKs, this masks sleep * @eco_microamp: eco mode load upper limit (in uA), valid for LDOs only */ struct hi6421_regulator_info { … }; /* HI6421 regulators */ enum hi6421_regulator_id { … }; /* LDO 0, 4~7, 9~14, 16~20 have same voltage table. */ static const unsigned int ldo_0_voltages[] = …; /* LDO 8, 15 have same voltage table. */ static const unsigned int ldo_8_voltages[] = …; /* Ranges are sorted in ascending order. */ static const struct linear_range ldo_audio_volt_range[] = …; static const unsigned int buck_3_voltages[] = …; static const unsigned int buck_4_voltages[] = …; static const unsigned int buck_5_voltages[] = …; static const struct regulator_ops hi6421_ldo_ops; static const struct regulator_ops hi6421_ldo_linear_ops; static const struct regulator_ops hi6421_ldo_linear_range_ops; static const struct regulator_ops hi6421_buck012_ops; static const struct regulator_ops hi6421_buck345_ops; #define HI6421_LDO_ENABLE_TIME … /* * _id - LDO id name string * _match - of match name string * v_table - voltage table * vreg - voltage select register * vmask - voltage select mask * ereg - enable register * emask - enable mask * odelay - off/on delay time in uS * ecomask - eco mode mask * ecoamp - eco mode load uppler limit in uA */ #define HI6421_LDO(_id, _match, v_table, vreg, vmask, ereg, emask, \ odelay, ecomask, ecoamp) … /* HI6421 LDO1~3 are linear voltage regulators at fixed uV_step * * _id - LDO id name string * _match - of match name string * _min_uV - minimum voltage supported in uV * n_volt - number of votages available * vstep - voltage increase in each linear step in uV * vreg - voltage select register * vmask - voltage select mask * ereg - enable register * emask - enable mask * odelay - off/on delay time in uS * ecomask - eco mode mask * ecoamp - eco mode load uppler limit in uA */ #define HI6421_LDO_LINEAR(_id, _match, _min_uV, n_volt, vstep, vreg, vmask,\ ereg, emask, odelay, ecomask, ecoamp) … /* HI6421 LDOAUDIO is a linear voltage regulator with two 4-step ranges * * _id - LDO id name string * _match - of match name string * n_volt - number of votages available * volt_ranges - array of linear_range * vstep - voltage increase in each linear step in uV * vreg - voltage select register * vmask - voltage select mask * ereg - enable register * emask - enable mask * odelay - off/on delay time in uS * ecomask - eco mode mask * ecoamp - eco mode load uppler limit in uA */ #define HI6421_LDO_LINEAR_RANGE(_id, _match, n_volt, volt_ranges, vreg, vmask,\ ereg, emask, odelay, ecomask, ecoamp) … /* HI6421 BUCK0/1/2 are linear voltage regulators at fixed uV_step * * _id - BUCK0/1/2 id name string * _match - of match name string * vreg - voltage select register * vmask - voltage select mask * ereg - enable register * emask - enable mask * sleepmask - mask of sleep mode * etime - enable time * odelay - off/on delay time in uS */ #define HI6421_BUCK012(_id, _match, vreg, vmask, ereg, emask, sleepmask,\ etime, odelay) … /* HI6421 BUCK3/4/5 share similar configurations as LDOs, with exception * that it supports SLEEP mode, so has different .ops. * * _id - LDO id name string * _match - of match name string * v_table - voltage table * vreg - voltage select register * vmask - voltage select mask * ereg - enable register * emask - enable mask * odelay - off/on delay time in uS * sleepmask - mask of sleep mode */ #define HI6421_BUCK345(_id, _match, v_table, vreg, vmask, ereg, emask, \ odelay, sleepmask) … /* HI6421 regulator information */ static struct hi6421_regulator_info hi6421_regulator_info[HI6421_NUM_REGULATORS] = …; static int hi6421_regulator_enable(struct regulator_dev *rdev) { … } static unsigned int hi6421_regulator_ldo_get_mode(struct regulator_dev *rdev) { … } static unsigned int hi6421_regulator_buck_get_mode(struct regulator_dev *rdev) { … } static int hi6421_regulator_ldo_set_mode(struct regulator_dev *rdev, unsigned int mode) { … } static int hi6421_regulator_buck_set_mode(struct regulator_dev *rdev, unsigned int mode) { … } static unsigned int hi6421_regulator_ldo_get_optimum_mode(struct regulator_dev *rdev, int input_uV, int output_uV, int load_uA) { … } static const struct regulator_ops hi6421_ldo_ops = …; static const struct regulator_ops hi6421_ldo_linear_ops = …; static const struct regulator_ops hi6421_ldo_linear_range_ops = …; static const struct regulator_ops hi6421_buck012_ops = …; static const struct regulator_ops hi6421_buck345_ops = …; static int hi6421_regulator_probe(struct platform_device *pdev) { … } static const struct platform_device_id hi6421_regulator_table[] = …; MODULE_DEVICE_TABLE(platform, hi6421_regulator_table); static struct platform_driver hi6421_regulator_driver = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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