545 lines
16 KiB
C
545 lines
16 KiB
C
/*
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* Regulator driver for TI TPS6586x
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*
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* Copyright (C) 2010 Compulab Ltd.
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* Author: Mike Rapoport <mike@compulab.co.il>
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*
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* Based on da903x
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* Copyright (C) 2006-2008 Marvell International Ltd.
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* Copyright (C) 2008 Compulab Ltd.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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#include <linux/kernel.h>
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#include <linux/module.h>
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#include <linux/init.h>
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#include <linux/err.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <linux/platform_device.h>
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#include <linux/regulator/driver.h>
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#include <linux/regulator/machine.h>
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#include <linux/regulator/of_regulator.h>
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#include <linux/mfd/tps6586x.h>
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/* supply control and voltage setting */
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#define TPS6586X_SUPPLYENA 0x10
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#define TPS6586X_SUPPLYENB 0x11
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#define TPS6586X_SUPPLYENC 0x12
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#define TPS6586X_SUPPLYEND 0x13
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#define TPS6586X_SUPPLYENE 0x14
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#define TPS6586X_VCC1 0x20
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#define TPS6586X_VCC2 0x21
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#define TPS6586X_SM1V1 0x23
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#define TPS6586X_SM1V2 0x24
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#define TPS6586X_SM1SL 0x25
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#define TPS6586X_SM0V1 0x26
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#define TPS6586X_SM0V2 0x27
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#define TPS6586X_SM0SL 0x28
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#define TPS6586X_LDO2AV1 0x29
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#define TPS6586X_LDO2AV2 0x2A
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#define TPS6586X_LDO2BV1 0x2F
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#define TPS6586X_LDO2BV2 0x30
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#define TPS6586X_LDO4V1 0x32
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#define TPS6586X_LDO4V2 0x33
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/* converter settings */
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#define TPS6586X_SUPPLYV1 0x41
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#define TPS6586X_SUPPLYV2 0x42
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#define TPS6586X_SUPPLYV3 0x43
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#define TPS6586X_SUPPLYV4 0x44
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#define TPS6586X_SUPPLYV5 0x45
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#define TPS6586X_SUPPLYV6 0x46
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#define TPS6586X_SMODE1 0x47
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#define TPS6586X_SMODE2 0x48
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struct tps6586x_regulator {
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struct regulator_desc desc;
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int enable_bit[2];
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int enable_reg[2];
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};
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static struct regulator_ops tps6586x_rw_regulator_ops = {
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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};
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static struct regulator_ops tps6586x_rw_linear_regulator_ops = {
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.list_voltage = regulator_list_voltage_linear,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.set_voltage_sel = regulator_set_voltage_sel_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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};
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static struct regulator_ops tps6586x_ro_regulator_ops = {
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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.get_voltage_sel = regulator_get_voltage_sel_regmap,
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.is_enabled = regulator_is_enabled_regmap,
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.enable = regulator_enable_regmap,
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.disable = regulator_disable_regmap,
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};
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static struct regulator_ops tps6586x_sys_regulator_ops = {
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};
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static const unsigned int tps6586x_ldo0_voltages[] = {
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1200000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
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};
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static const unsigned int tps6586x_ldo_voltages[] = {
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1250000, 1500000, 1800000, 2500000, 2700000, 2850000, 3100000, 3300000,
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};
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static const unsigned int tps658640_rtc_voltages[] = {
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2500000, 2850000, 3100000, 3300000,
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};
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#define TPS6586X_REGULATOR(_id, _ops, _pin_name, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
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.desc = { \
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.supply_name = _pin_name, \
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.name = "REG-" #_id, \
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.ops = &tps6586x_## _ops ## _regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = TPS6586X_ID_##_id, \
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.n_voltages = ARRAY_SIZE(vdata##_voltages), \
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.volt_table = vdata##_voltages, \
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.owner = THIS_MODULE, \
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.enable_reg = TPS6586X_SUPPLY##ereg0, \
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.enable_mask = 1 << (ebit0), \
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.vsel_reg = TPS6586X_##vreg, \
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.vsel_mask = ((1 << (nbits)) - 1) << (shift), \
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.apply_reg = (goreg), \
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.apply_bit = (gobit), \
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}, \
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.enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
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.enable_bit[0] = (ebit0), \
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.enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
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.enable_bit[1] = (ebit1),
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#define TPS6586X_REGULATOR_LINEAR(_id, _ops, _pin_name, n_volt, min_uv, \
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uv_step, vreg, shift, nbits, ereg0, \
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ebit0, ereg1, ebit1, goreg, gobit) \
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.desc = { \
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.supply_name = _pin_name, \
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.name = "REG-" #_id, \
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.ops = &tps6586x_## _ops ## _regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = TPS6586X_ID_##_id, \
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.n_voltages = n_volt, \
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.min_uV = min_uv, \
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.uV_step = uv_step, \
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.owner = THIS_MODULE, \
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.enable_reg = TPS6586X_SUPPLY##ereg0, \
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.enable_mask = 1 << (ebit0), \
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.vsel_reg = TPS6586X_##vreg, \
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.vsel_mask = ((1 << (nbits)) - 1) << (shift), \
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.apply_reg = (goreg), \
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.apply_bit = (gobit), \
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}, \
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.enable_reg[0] = TPS6586X_SUPPLY##ereg0, \
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.enable_bit[0] = (ebit0), \
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.enable_reg[1] = TPS6586X_SUPPLY##ereg1, \
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.enable_bit[1] = (ebit1),
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#define TPS6586X_LDO(_id, _pname, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1) \
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{ \
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TPS6586X_REGULATOR(_id, rw, _pname, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1, 0, 0) \
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}
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#define TPS6586X_LDO_LINEAR(_id, _pname, n_volt, min_uv, uv_step, vreg, \
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shift, nbits, ereg0, ebit0, ereg1, ebit1) \
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{ \
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TPS6586X_REGULATOR_LINEAR(_id, rw_linear, _pname, n_volt, \
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min_uv, uv_step, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1, 0, 0) \
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}
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#define TPS6586X_FIXED_LDO(_id, _pname, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1) \
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{ \
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TPS6586X_REGULATOR(_id, ro, _pname, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1, 0, 0) \
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}
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#define TPS6586X_DVM(_id, _pname, n_volt, min_uv, uv_step, vreg, shift, \
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nbits, ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
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{ \
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TPS6586X_REGULATOR_LINEAR(_id, rw_linear, _pname, n_volt, \
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min_uv, uv_step, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1, goreg, \
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gobit) \
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}
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#define TPS6586X_SYS_REGULATOR() \
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{ \
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.desc = { \
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.supply_name = "sys", \
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.name = "REG-SYS", \
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.ops = &tps6586x_sys_regulator_ops, \
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.type = REGULATOR_VOLTAGE, \
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.id = TPS6586X_ID_SYS, \
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.owner = THIS_MODULE, \
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}, \
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}
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static struct tps6586x_regulator tps6586x_regulator[] = {
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TPS6586X_SYS_REGULATOR(),
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TPS6586X_LDO(LDO_0, "vinldo01", tps6586x_ldo0, SUPPLYV1, 5, 3, ENC, 0,
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END, 0),
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TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo, SUPPLYV4, 0, 3, ENC, 2,
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END, 2),
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TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo, SUPPLYV6, 0, 3, ENE, 6,
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ENE, 6),
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TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo, SUPPLYV3, 0, 3, ENC, 4,
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END, 4),
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TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo, SUPPLYV3, 3, 3, ENC, 5,
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END, 5),
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TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo, SUPPLYV2, 5, 3, ENC, 6,
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END, 6),
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TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo, SUPPLYV6, 3, 3, ENE, 7,
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ENE, 7),
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TPS6586X_LDO(LDO_RTC, "REG-SYS", tps6586x_ldo, SUPPLYV4, 3, 3, V4, 7,
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V4, 7),
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TPS6586X_LDO_LINEAR(LDO_1, "vinldo01", 32, 725000, 25000, SUPPLYV1,
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0, 5, ENC, 1, END, 1),
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TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 3000000, 50000, SUPPLYV2,
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0, 5, ENC, 7, END, 7),
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TPS6586X_DVM(LDO_2, "vinldo23", 32, 725000, 25000, LDO2BV1, 0, 5,
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ENA, 3, ENB, 3, TPS6586X_VCC2, BIT(6)),
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TPS6586X_DVM(LDO_4, "vinldo4", 32, 1700000, 25000, LDO4V1, 0, 5,
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ENC, 3, END, 3, TPS6586X_VCC1, BIT(6)),
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TPS6586X_DVM(SM_0, "vin-sm0", 32, 725000, 25000, SM0V1, 0, 5,
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ENA, 1, ENB, 1, TPS6586X_VCC1, BIT(2)),
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TPS6586X_DVM(SM_1, "vin-sm1", 32, 725000, 25000, SM1V1, 0, 5,
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ENA, 0, ENB, 0, TPS6586X_VCC1, BIT(0)),
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};
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static struct tps6586x_regulator tps658623_regulator[] = {
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TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 1700000, 25000, SUPPLYV2,
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0, 5, ENC, 7, END, 7),
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};
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static struct tps6586x_regulator tps658640_regulator[] = {
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TPS6586X_LDO(LDO_3, "vinldo23", tps6586x_ldo0, SUPPLYV4, 0, 3,
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ENC, 2, END, 2),
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TPS6586X_LDO(LDO_5, "REG-SYS", tps6586x_ldo0, SUPPLYV6, 0, 3,
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ENE, 6, ENE, 6),
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TPS6586X_LDO(LDO_6, "vinldo678", tps6586x_ldo0, SUPPLYV3, 0, 3,
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ENC, 4, END, 4),
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TPS6586X_LDO(LDO_7, "vinldo678", tps6586x_ldo0, SUPPLYV3, 3, 3,
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ENC, 5, END, 5),
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TPS6586X_LDO(LDO_8, "vinldo678", tps6586x_ldo0, SUPPLYV2, 5, 3,
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ENC, 6, END, 6),
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TPS6586X_LDO(LDO_9, "vinldo9", tps6586x_ldo0, SUPPLYV6, 3, 3,
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ENE, 7, ENE, 7),
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TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 2150000, 50000, SUPPLYV2,
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0, 5, ENC, 7, END, 7),
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TPS6586X_FIXED_LDO(LDO_RTC, "REG-SYS", tps658640_rtc, SUPPLYV4, 3, 2,
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V4, 7, V4, 7),
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};
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static struct tps6586x_regulator tps658643_regulator[] = {
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TPS6586X_LDO_LINEAR(SM_2, "vin-sm2", 32, 1025000, 25000, SUPPLYV2,
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0, 5, ENC, 7, END, 7),
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};
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/*
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* TPS6586X has 2 enable bits that are OR'ed to determine the actual
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* regulator state. Clearing one of this bits allows switching
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* regulator on and of with single register write.
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*/
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static inline int tps6586x_regulator_preinit(struct device *parent,
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struct tps6586x_regulator *ri)
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{
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uint8_t val1, val2;
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int ret;
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if (ri->enable_reg[0] == ri->enable_reg[1] &&
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ri->enable_bit[0] == ri->enable_bit[1])
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return 0;
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ret = tps6586x_read(parent, ri->enable_reg[0], &val1);
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if (ret)
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return ret;
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ret = tps6586x_read(parent, ri->enable_reg[1], &val2);
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if (ret)
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return ret;
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if (!(val2 & (1 << ri->enable_bit[1])))
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return 0;
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/*
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* The regulator is on, but it's enabled with the bit we don't
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* want to use, so we switch the enable bits
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*/
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if (!(val1 & (1 << ri->enable_bit[0]))) {
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ret = tps6586x_set_bits(parent, ri->enable_reg[0],
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1 << ri->enable_bit[0]);
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if (ret)
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return ret;
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}
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return tps6586x_clr_bits(parent, ri->enable_reg[1],
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1 << ri->enable_bit[1]);
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}
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static int tps6586x_regulator_set_slew_rate(struct platform_device *pdev,
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int id, struct regulator_init_data *p)
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{
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struct device *parent = pdev->dev.parent;
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struct tps6586x_settings *setting = p->driver_data;
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uint8_t reg;
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if (setting == NULL)
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return 0;
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if (!(setting->slew_rate & TPS6586X_SLEW_RATE_SET))
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return 0;
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/* only SM0 and SM1 can have the slew rate settings */
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switch (id) {
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case TPS6586X_ID_SM_0:
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reg = TPS6586X_SM0SL;
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break;
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case TPS6586X_ID_SM_1:
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reg = TPS6586X_SM1SL;
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break;
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default:
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dev_err(&pdev->dev, "Only SM0/SM1 can set slew rate\n");
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return -EINVAL;
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}
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return tps6586x_write(parent, reg,
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setting->slew_rate & TPS6586X_SLEW_RATE_MASK);
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}
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static struct tps6586x_regulator *find_regulator_info(int id, int version)
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{
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struct tps6586x_regulator *ri;
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struct tps6586x_regulator *table = NULL;
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int num;
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int i;
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switch (version) {
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case TPS658623:
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table = tps658623_regulator;
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num = ARRAY_SIZE(tps658623_regulator);
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break;
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case TPS658640:
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case TPS658640v2:
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table = tps658640_regulator;
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num = ARRAY_SIZE(tps658640_regulator);
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break;
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case TPS658643:
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table = tps658643_regulator;
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num = ARRAY_SIZE(tps658643_regulator);
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break;
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}
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/* Search version specific table first */
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if (table) {
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for (i = 0; i < num; i++) {
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ri = &table[i];
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if (ri->desc.id == id)
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return ri;
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}
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}
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for (i = 0; i < ARRAY_SIZE(tps6586x_regulator); i++) {
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ri = &tps6586x_regulator[i];
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if (ri->desc.id == id)
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return ri;
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}
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return NULL;
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}
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#ifdef CONFIG_OF
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static struct of_regulator_match tps6586x_matches[] = {
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{ .name = "sys", .driver_data = (void *)TPS6586X_ID_SYS },
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{ .name = "sm0", .driver_data = (void *)TPS6586X_ID_SM_0 },
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{ .name = "sm1", .driver_data = (void *)TPS6586X_ID_SM_1 },
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{ .name = "sm2", .driver_data = (void *)TPS6586X_ID_SM_2 },
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{ .name = "ldo0", .driver_data = (void *)TPS6586X_ID_LDO_0 },
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{ .name = "ldo1", .driver_data = (void *)TPS6586X_ID_LDO_1 },
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{ .name = "ldo2", .driver_data = (void *)TPS6586X_ID_LDO_2 },
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{ .name = "ldo3", .driver_data = (void *)TPS6586X_ID_LDO_3 },
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{ .name = "ldo4", .driver_data = (void *)TPS6586X_ID_LDO_4 },
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{ .name = "ldo5", .driver_data = (void *)TPS6586X_ID_LDO_5 },
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{ .name = "ldo6", .driver_data = (void *)TPS6586X_ID_LDO_6 },
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{ .name = "ldo7", .driver_data = (void *)TPS6586X_ID_LDO_7 },
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{ .name = "ldo8", .driver_data = (void *)TPS6586X_ID_LDO_8 },
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{ .name = "ldo9", .driver_data = (void *)TPS6586X_ID_LDO_9 },
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{ .name = "ldo_rtc", .driver_data = (void *)TPS6586X_ID_LDO_RTC },
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};
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static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
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struct platform_device *pdev,
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struct of_regulator_match **tps6586x_reg_matches)
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{
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const unsigned int num = ARRAY_SIZE(tps6586x_matches);
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struct device_node *np = pdev->dev.parent->of_node;
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struct device_node *regs;
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const char *sys_rail = NULL;
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unsigned int i;
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struct tps6586x_platform_data *pdata;
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int err;
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|
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regs = of_get_child_by_name(np, "regulators");
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if (!regs) {
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dev_err(&pdev->dev, "regulator node not found\n");
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return NULL;
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}
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|
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err = of_regulator_match(&pdev->dev, regs, tps6586x_matches, num);
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of_node_put(regs);
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if (err < 0) {
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dev_err(&pdev->dev, "Regulator match failed, e %d\n", err);
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return NULL;
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}
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pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL);
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if (!pdata)
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return NULL;
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|
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for (i = 0; i < num; i++) {
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int id;
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if (!tps6586x_matches[i].init_data)
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continue;
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|
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pdata->reg_init_data[i] = tps6586x_matches[i].init_data;
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id = (int)tps6586x_matches[i].driver_data;
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if (id == TPS6586X_ID_SYS)
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sys_rail = pdata->reg_init_data[i]->constraints.name;
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|
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if ((id == TPS6586X_ID_LDO_5) || (id == TPS6586X_ID_LDO_RTC))
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pdata->reg_init_data[i]->supply_regulator = sys_rail;
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}
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*tps6586x_reg_matches = tps6586x_matches;
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return pdata;
|
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}
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#else
|
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static struct tps6586x_platform_data *tps6586x_parse_regulator_dt(
|
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struct platform_device *pdev,
|
|
struct of_regulator_match **tps6586x_reg_matches)
|
|
{
|
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*tps6586x_reg_matches = NULL;
|
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return NULL;
|
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}
|
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#endif
|
|
|
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static int tps6586x_regulator_probe(struct platform_device *pdev)
|
|
{
|
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struct tps6586x_regulator *ri = NULL;
|
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struct regulator_config config = { };
|
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struct regulator_dev *rdev;
|
|
struct regulator_init_data *reg_data;
|
|
struct tps6586x_platform_data *pdata;
|
|
struct of_regulator_match *tps6586x_reg_matches = NULL;
|
|
int version;
|
|
int id;
|
|
int err;
|
|
|
|
dev_dbg(&pdev->dev, "Probing regulator\n");
|
|
|
|
pdata = dev_get_platdata(pdev->dev.parent);
|
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if ((!pdata) && (pdev->dev.parent->of_node))
|
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pdata = tps6586x_parse_regulator_dt(pdev,
|
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&tps6586x_reg_matches);
|
|
|
|
if (!pdata) {
|
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dev_err(&pdev->dev, "Platform data not available, exiting\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
version = tps6586x_get_version(pdev->dev.parent);
|
|
|
|
for (id = 0; id < TPS6586X_ID_MAX_REGULATOR; ++id) {
|
|
reg_data = pdata->reg_init_data[id];
|
|
|
|
ri = find_regulator_info(id, version);
|
|
|
|
if (!ri) {
|
|
dev_err(&pdev->dev, "invalid regulator ID specified\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
|
|
if (err) {
|
|
dev_err(&pdev->dev,
|
|
"regulator %d preinit failed, e %d\n", id, err);
|
|
return err;
|
|
}
|
|
|
|
config.dev = pdev->dev.parent;
|
|
config.init_data = reg_data;
|
|
config.driver_data = ri;
|
|
|
|
if (tps6586x_reg_matches)
|
|
config.of_node = tps6586x_reg_matches[id].of_node;
|
|
|
|
rdev = devm_regulator_register(&pdev->dev, &ri->desc, &config);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&pdev->dev, "failed to register regulator %s\n",
|
|
ri->desc.name);
|
|
return PTR_ERR(rdev);
|
|
}
|
|
|
|
if (reg_data) {
|
|
err = tps6586x_regulator_set_slew_rate(pdev, id,
|
|
reg_data);
|
|
if (err < 0) {
|
|
dev_err(&pdev->dev,
|
|
"Slew rate config failed, e %d\n", err);
|
|
return err;
|
|
}
|
|
}
|
|
}
|
|
|
|
platform_set_drvdata(pdev, rdev);
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tps6586x_regulator_driver = {
|
|
.driver = {
|
|
.name = "tps6586x-regulator",
|
|
},
|
|
.probe = tps6586x_regulator_probe,
|
|
};
|
|
|
|
static int __init tps6586x_regulator_init(void)
|
|
{
|
|
return platform_driver_register(&tps6586x_regulator_driver);
|
|
}
|
|
subsys_initcall(tps6586x_regulator_init);
|
|
|
|
static void __exit tps6586x_regulator_exit(void)
|
|
{
|
|
platform_driver_unregister(&tps6586x_regulator_driver);
|
|
}
|
|
module_exit(tps6586x_regulator_exit);
|
|
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
|
|
MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
|
|
MODULE_ALIAS("platform:tps6586x-regulator");
|