// SPDX-License-Identifier: GPL-2.0-or-later /* * twl-regulator.c -- support regulators in twl4030/twl6030 family chips * * Copyright (C) 2008 David Brownell */ #include <linux/module.h> #include <linux/string.h> #include <linux/slab.h> #include <linux/init.h> #include <linux/err.h> #include <linux/platform_device.h> #include <linux/of.h> #include <linux/regulator/driver.h> #include <linux/regulator/machine.h> #include <linux/regulator/of_regulator.h> #include <linux/mfd/twl.h> #include <linux/delay.h> /* * The TWL4030/TW5030/TPS659x0 family chips include power management, a * USB OTG transceiver, an RTC, ADC, PWM, and lots more. Some versions * include an audio codec, battery charger, and more voltage regulators. * These chips are often used in OMAP-based systems. * * This driver implements software-based resource control for various * voltage regulators. This is usually augmented with state machine * based control. */ struct twlreg_info { … }; /* LDO control registers ... offset is from the base of its register bank. * The first three registers of all power resource banks help hardware to * manage the various resource groups. */ /* Common offset in TWL4030/6030 */ #define VREG_GRP … /* TWL4030 register offsets */ #define VREG_TYPE … #define VREG_REMAP … #define VREG_DEDICATED … #define VREG_VOLTAGE_SMPS_4030 … /* TWL6030 register offsets */ #define VREG_TRANS … #define VREG_STATE … #define VREG_VOLTAGE … #define VREG_VOLTAGE_SMPS … static inline int twlreg_read(struct twlreg_info *info, unsigned slave_subgp, unsigned offset) { … } static inline int twlreg_write(struct twlreg_info *info, unsigned slave_subgp, unsigned offset, u8 value) { … } /*----------------------------------------------------------------------*/ /* generic power resource operations, which work on all regulators */ static int twlreg_grp(struct regulator_dev *rdev) { … } /* * Enable/disable regulators by joining/leaving the P1 (processor) group. * We assume nobody else is updating the DEV_GRP registers. */ /* definition for 4030 family */ #define P3_GRP_4030 … #define P2_GRP_4030 … #define P1_GRP_4030 … /* definition for 6030 family */ #define P3_GRP_6030 … #define P2_GRP_6030 … #define P1_GRP_6030 … static int twl4030reg_is_enabled(struct regulator_dev *rdev) { … } #define PB_I2C_BUSY … #define PB_I2C_BWEN … /* Wait until buffer empty/ready to send a word on power bus. */ static int twl4030_wait_pb_ready(void) { … } /* Send a word over the powerbus */ static int twl4030_send_pb_msg(unsigned msg) { … } static int twl4030reg_enable(struct regulator_dev *rdev) { … } static int twl4030reg_disable(struct regulator_dev *rdev) { … } static int twl4030reg_get_status(struct regulator_dev *rdev) { … } static int twl4030reg_set_mode(struct regulator_dev *rdev, unsigned mode) { … } static inline unsigned int twl4030reg_map_mode(unsigned int mode) { … } /*----------------------------------------------------------------------*/ /* * Support for adjustable-voltage LDOs uses a four bit (or less) voltage * select field in its control register. We use tables indexed by VSEL * to record voltages in milliVolts. (Accuracy is about three percent.) * * Note that VSEL values for VAUX2 changed in twl5030 and newer silicon; * currently handled by listing two slightly different VAUX2 regulators, * only one of which will be configured. * * VSEL values documented as "TI cannot support these values" are flagged * in these tables as UNSUP() values; we normally won't assign them. * * VAUX3 at 3V is incorrectly listed in some TI manuals as unsupported. * TI are revising the twl5030/tps659x0 specs to support that 3.0V setting. */ #define UNSUP_MASK … #define UNSUP(x) … #define IS_UNSUP(info, x) … #define LDO_MV(x) … static const u16 VAUX1_VSEL_table[] = …; static const u16 VAUX2_4030_VSEL_table[] = …; static const u16 VAUX2_VSEL_table[] = …; static const u16 VAUX3_VSEL_table[] = …; static const u16 VAUX4_VSEL_table[] = …; static const u16 VMMC1_VSEL_table[] = …; static const u16 VMMC2_VSEL_table[] = …; static const u16 VPLL1_VSEL_table[] = …; static const u16 VPLL2_VSEL_table[] = …; static const u16 VSIM_VSEL_table[] = …; static const u16 VDAC_VSEL_table[] = …; static const u16 VIO_VSEL_table[] = …; static const u16 VINTANA2_VSEL_table[] = …; /* 600mV to 1450mV in 12.5 mV steps */ static const struct linear_range VDD1_ranges[] = …; /* 600mV to 1450mV in 12.5 mV steps, everything above = 1500mV */ static const struct linear_range VDD2_ranges[] = …; static int twl4030ldo_list_voltage(struct regulator_dev *rdev, unsigned index) { … } static int twl4030ldo_set_voltage_sel(struct regulator_dev *rdev, unsigned selector) { … } static int twl4030ldo_get_voltage_sel(struct regulator_dev *rdev) { … } static const struct regulator_ops twl4030ldo_ops = …; static int twl4030smps_set_voltage(struct regulator_dev *rdev, int min_uV, int max_uV, unsigned *selector) { … } static int twl4030smps_get_voltage(struct regulator_dev *rdev) { … } static const struct regulator_ops twl4030smps_ops = …; /*----------------------------------------------------------------------*/ static const struct regulator_ops twl4030fixed_ops = …; /*----------------------------------------------------------------------*/ #define TWL4030_ADJUSTABLE_LDO(label, offset, num, turnon_delay, remap_conf) … #define TWL4030_ADJUSTABLE_SMPS(label, offset, num, turnon_delay, remap_conf, \ n_volt) … #define TWL4030_FIXED_LDO(label, offset, mVolts, num, turnon_delay, \ remap_conf) … /* * We list regulators here if systems need some level of * software control over them after boot. */ TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_LDO(…); TWL4030_ADJUSTABLE_SMPS(…); TWL4030_ADJUSTABLE_SMPS(…); /* VUSBCP is managed *only* by the USB subchip */ TWL4030_FIXED_LDO(…); TWL4030_FIXED_LDO(…); TWL4030_FIXED_LDO(…); TWL4030_FIXED_LDO(…); TWL4030_FIXED_LDO(…); #define TWL_OF_MATCH(comp, family, label) … #define TWL4030_OF_MATCH(comp, label) … #define TWL6030_OF_MATCH(comp, label) … #define TWL6032_OF_MATCH(comp, label) … #define TWLFIXED_OF_MATCH(comp, label) … #define TWLSMPS_OF_MATCH(comp, label) … static const struct of_device_id twl_of_match[] = …; MODULE_DEVICE_TABLE(of, twl_of_match); static int twlreg_probe(struct platform_device *pdev) { … } MODULE_ALIAS(…) …; static struct platform_driver twlreg_driver = …; static int __init twlreg_init(void) { … } subsys_initcall(twlreg_init); static void __exit twlreg_exit(void) { … } module_exit(…) MODULE_DESCRIPTION(…) …; MODULE_LICENSE(…) …;
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