// SPDX-License-Identifier: GPL-2.0-only // // Copyright 2014 Embest Technology Co. Ltd. Inc. // bd71815-regulator.c ROHM BD71815 regulator driver // // Author: Tony Luo <[email protected]> // // Partially rewritten at 2021 by // Matti Vaittinen <[email protected]> #include <linux/kernel.h> #include <linux/module.h> #include <linux/init.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/of.h> #include <linux/gpio/consumer.h> #include <linux/regulator/driver.h> #include <linux/delay.h> #include <linux/slab.h> #include <linux/mfd/rohm-generic.h> #include <linux/mfd/rohm-bd71815.h> #include <linux/regulator/of_regulator.h> struct bd71815_regulator { … }; static const int bd7181x_wled_currents[] = …; static const struct rohm_dvs_config buck1_dvs = …; static const struct rohm_dvs_config buck2_dvs = …; static const struct rohm_dvs_config buck3_dvs = …; static const struct rohm_dvs_config buck4_dvs = …; static const struct rohm_dvs_config ldo1_dvs = …; static const struct rohm_dvs_config ldo2_dvs = …; static const struct rohm_dvs_config ldo3_dvs = …; static const struct rohm_dvs_config ldo4_dvs = …; static const struct rohm_dvs_config ldo5_dvs = …; static const struct rohm_dvs_config dvref_dvs = …; static const struct rohm_dvs_config ldolpsr_dvs = …; static const struct rohm_dvs_config buck5_dvs = …; static int set_hw_dvs_levels(struct device_node *np, const struct regulator_desc *desc, struct regulator_config *cfg) { … } /* * Bucks 1 and 2 have two voltage selection registers where selected * voltage can be set. Which of the registers is used can be either controlled * by a control bit in register - or by HW state. If HW state specific voltages * are given - then we assume HW state based control should be used. * * If volatge value is updated to currently selected register - then output * voltage is immediately changed no matter what is set as ramp rate. Thus we * default changing voltage by writing new value to inactive register and * then updating the 'register selection' bit. This naturally only works when * HW state machine is not used to select the voltage. */ static int buck12_set_hw_dvs_levels(struct device_node *np, const struct regulator_desc *desc, struct regulator_config *cfg) { … } /* * BUCK1/2 * BUCK1RAMPRATE[1:0] BUCK1 DVS ramp rate setting * 00: 10.00mV/usec 10mV 1uS * 01: 5.00mV/usec 10mV 2uS * 10: 2.50mV/usec 10mV 4uS * 11: 1.25mV/usec 10mV 8uS */ static const unsigned int bd7181x_ramp_table[] = …; static int bd7181x_led_set_current_limit(struct regulator_dev *rdev, int min_uA, int max_uA) { … } static int bd7181x_buck12_get_voltage_sel(struct regulator_dev *rdev) { … } /* * For Buck 1/2. */ static int bd7181x_buck12_set_voltage_sel(struct regulator_dev *rdev, unsigned int sel) { … } static const struct regulator_ops bd7181x_ldo_regulator_ops = …; static const struct regulator_ops bd7181x_fixed_regulator_ops = …; static const struct regulator_ops bd7181x_buck_regulator_ops = …; static const struct regulator_ops bd7181x_buck12_regulator_ops = …; static const struct regulator_ops bd7181x_led_regulator_ops = …; #define BD71815_FIXED_REG(_name, _id, ereg, emsk, voltage, _dvs) … #define BD71815_BUCK_REG(_name, _id, vsel, ereg, min, max, step, _dvs) … #define BD71815_BUCK12_REG(_name, _id, vsel, ereg, min, max, step, \ _dvs) … #define BD71815_LED_REG(_name, _id, csel, mask, ereg, emsk, currents) … #define BD71815_LDO_REG(_name, _id, vsel, ereg, emsk, min, max, step, \ _dvs) … static const struct bd71815_regulator bd71815_regulators[] = …; static int bd7181x_probe(struct platform_device *pdev) { … } static const struct platform_device_id bd7181x_pmic_id[] = …; MODULE_DEVICE_TABLE(platform, bd7181x_pmic_id); static struct platform_driver bd7181x_regulator = …; module_platform_driver(…) …; MODULE_AUTHOR(…) …; MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …; MODULE_ALIAS(…) …;
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