mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-18 16:06:44 +07:00
7f852e0584
As per datasheet, the vin pin for the regulator is named as vin_sm0, vin_sm1, vin_sm2 for sm0, sm1 and sm2 respectively. Correcting the names in driver and documentation to match with datasheet. Signed-off-by: Laxman Dewangan <ldewangan@nvidia.com> Reported-by: Stephen Warren <swarren@nvidia.com> Acked-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
409 lines
11 KiB
C
409 lines
11 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/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/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 volt_reg;
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int volt_shift;
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int volt_nbits;
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int enable_bit[2];
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int enable_reg[2];
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/* for DVM regulators */
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int go_reg;
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int go_bit;
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};
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static inline struct device *to_tps6586x_dev(struct regulator_dev *rdev)
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{
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return rdev_get_dev(rdev)->parent;
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}
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static int tps6586x_set_voltage_sel(struct regulator_dev *rdev,
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unsigned selector)
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{
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struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
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struct device *parent = to_tps6586x_dev(rdev);
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int ret, val, rid = rdev_get_id(rdev);
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uint8_t mask;
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val = selector << ri->volt_shift;
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mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
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ret = tps6586x_update(parent, ri->volt_reg, val, mask);
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if (ret)
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return ret;
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/* Update go bit for DVM regulators */
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switch (rid) {
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case TPS6586X_ID_LDO_2:
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case TPS6586X_ID_LDO_4:
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case TPS6586X_ID_SM_0:
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case TPS6586X_ID_SM_1:
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ret = tps6586x_set_bits(parent, ri->go_reg, 1 << ri->go_bit);
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break;
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}
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return ret;
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}
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static int tps6586x_get_voltage_sel(struct regulator_dev *rdev)
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{
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struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
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struct device *parent = to_tps6586x_dev(rdev);
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uint8_t val, mask;
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int ret;
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ret = tps6586x_read(parent, ri->volt_reg, &val);
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if (ret)
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return ret;
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mask = ((1 << ri->volt_nbits) - 1) << ri->volt_shift;
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val = (val & mask) >> ri->volt_shift;
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if (val >= ri->desc.n_voltages)
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BUG();
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return val;
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}
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static int tps6586x_regulator_enable(struct regulator_dev *rdev)
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{
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struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
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struct device *parent = to_tps6586x_dev(rdev);
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return tps6586x_set_bits(parent, ri->enable_reg[0],
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1 << ri->enable_bit[0]);
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}
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static int tps6586x_regulator_disable(struct regulator_dev *rdev)
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{
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struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
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struct device *parent = to_tps6586x_dev(rdev);
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return tps6586x_clr_bits(parent, ri->enable_reg[0],
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1 << ri->enable_bit[0]);
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}
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static int tps6586x_regulator_is_enabled(struct regulator_dev *rdev)
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{
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struct tps6586x_regulator *ri = rdev_get_drvdata(rdev);
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struct device *parent = to_tps6586x_dev(rdev);
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uint8_t reg_val;
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int ret;
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ret = tps6586x_read(parent, ri->enable_reg[0], ®_val);
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if (ret)
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return ret;
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return !!(reg_val & (1 << ri->enable_bit[0]));
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}
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static struct regulator_ops tps6586x_regulator_ops = {
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.list_voltage = regulator_list_voltage_table,
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.get_voltage_sel = tps6586x_get_voltage_sel,
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.set_voltage_sel = tps6586x_set_voltage_sel,
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.is_enabled = tps6586x_regulator_is_enabled,
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.enable = tps6586x_regulator_enable,
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.disable = tps6586x_regulator_disable,
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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_ldo4_voltages[] = {
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1700000, 1725000, 1750000, 1775000, 1800000, 1825000, 1850000, 1875000,
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1900000, 1925000, 1950000, 1975000, 2000000, 2025000, 2050000, 2075000,
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2100000, 2125000, 2150000, 2175000, 2200000, 2225000, 2250000, 2275000,
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2300000, 2325000, 2350000, 2375000, 2400000, 2425000, 2450000, 2475000,
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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 tps6586x_sm2_voltages[] = {
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3000000, 3050000, 3100000, 3150000, 3200000, 3250000, 3300000, 3350000,
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3400000, 3450000, 3500000, 3550000, 3600000, 3650000, 3700000, 3750000,
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3800000, 3850000, 3900000, 3950000, 4000000, 4050000, 4100000, 4150000,
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4200000, 4250000, 4300000, 4350000, 4400000, 4450000, 4500000, 4550000,
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};
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static const unsigned int tps6586x_dvm_voltages[] = {
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725000, 750000, 775000, 800000, 825000, 850000, 875000, 900000,
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925000, 950000, 975000, 1000000, 1025000, 1050000, 1075000, 1100000,
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1125000, 1150000, 1175000, 1200000, 1225000, 1250000, 1275000, 1300000,
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1325000, 1350000, 1375000, 1400000, 1425000, 1450000, 1475000, 1500000,
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};
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#define TPS6586X_REGULATOR(_id, _pin_name, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1) \
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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_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(tps6586x_##vdata##_voltages), \
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.volt_table = tps6586x_##vdata##_voltages, \
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.owner = THIS_MODULE, \
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}, \
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.volt_reg = TPS6586X_##vreg, \
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.volt_shift = (shift), \
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.volt_nbits = (nbits), \
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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_DVM_GOREG(goreg, gobit) \
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.go_reg = TPS6586X_##goreg, \
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.go_bit = (gobit),
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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, _pname, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1) \
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}
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#define TPS6586X_DVM(_id, _pname, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1, goreg, gobit) \
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{ \
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TPS6586X_REGULATOR(_id, _pname, vdata, vreg, shift, nbits, \
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ereg0, ebit0, ereg1, ebit1) \
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TPS6586X_REGULATOR_DVM_GOREG(goreg, gobit) \
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}
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static struct tps6586x_regulator tps6586x_regulator[] = {
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TPS6586X_LDO(LDO_0, "vinldo01", ldo0, SUPPLYV1, 5, 3, ENC, 0, END, 0),
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TPS6586X_LDO(LDO_3, "vinldo23", ldo, SUPPLYV4, 0, 3, ENC, 2, END, 2),
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TPS6586X_LDO(LDO_5, NULL, ldo, SUPPLYV6, 0, 3, ENE, 6, ENE, 6),
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TPS6586X_LDO(LDO_6, "vinldo678", ldo, SUPPLYV3, 0, 3, ENC, 4, END, 4),
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TPS6586X_LDO(LDO_7, "vinldo678", ldo, SUPPLYV3, 3, 3, ENC, 5, END, 5),
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TPS6586X_LDO(LDO_8, "vinldo678", ldo, SUPPLYV2, 5, 3, ENC, 6, END, 6),
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TPS6586X_LDO(LDO_9, "vinldo9", ldo, SUPPLYV6, 3, 3, ENE, 7, ENE, 7),
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TPS6586X_LDO(LDO_RTC, NULL, ldo, SUPPLYV4, 3, 3, V4, 7, V4, 7),
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TPS6586X_LDO(LDO_1, "vinldo01", dvm, SUPPLYV1, 0, 5, ENC, 1, END, 1),
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TPS6586X_LDO(SM_2, "vin-sm2", sm2, SUPPLYV2, 0, 5, ENC, 7, END, 7),
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TPS6586X_DVM(LDO_2, "vinldo23", dvm, LDO2BV1, 0, 5, ENA, 3,
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ENB, 3, VCC2, 6),
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TPS6586X_DVM(LDO_4, "vinldo4", ldo4, LDO4V1, 0, 5, ENC, 3,
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END, 3, VCC1, 6),
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TPS6586X_DVM(SM_0, "vin-sm0", dvm, SM0V1, 0, 5, ENA, 1,
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ENB, 1, VCC1, 2),
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TPS6586X_DVM(SM_1, "vin-sm1", dvm, SM1V1, 0, 5, ENA, 0,
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ENB, 0, VCC1, 0),
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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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{
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struct device *parent = pdev->dev.parent;
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struct regulator_init_data *p = pdev->dev.platform_data;
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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 (pdev->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_warn(&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 inline struct tps6586x_regulator *find_regulator_info(int id)
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{
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struct tps6586x_regulator *ri;
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int i;
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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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static int __devinit tps6586x_regulator_probe(struct platform_device *pdev)
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{
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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;
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int id = pdev->id;
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int err;
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dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
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ri = find_regulator_info(id);
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if (ri == NULL) {
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dev_err(&pdev->dev, "invalid regulator ID specified\n");
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return -EINVAL;
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}
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err = tps6586x_regulator_preinit(pdev->dev.parent, ri);
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if (err)
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return err;
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config.dev = pdev->dev.parent;
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config.of_node = pdev->dev.of_node;
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config.init_data = pdev->dev.platform_data;
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config.driver_data = ri;
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rdev = regulator_register(&ri->desc, &config);
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if (IS_ERR(rdev)) {
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dev_err(&pdev->dev, "failed to register regulator %s\n",
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ri->desc.name);
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return PTR_ERR(rdev);
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}
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platform_set_drvdata(pdev, rdev);
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return tps6586x_regulator_set_slew_rate(pdev);
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}
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static int __devexit tps6586x_regulator_remove(struct platform_device *pdev)
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{
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struct regulator_dev *rdev = platform_get_drvdata(pdev);
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regulator_unregister(rdev);
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return 0;
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}
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static struct platform_driver tps6586x_regulator_driver = {
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.driver = {
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.name = "tps6586x-regulator",
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.owner = THIS_MODULE,
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},
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.probe = tps6586x_regulator_probe,
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.remove = __devexit_p(tps6586x_regulator_remove),
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};
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static int __init tps6586x_regulator_init(void)
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{
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return platform_driver_register(&tps6586x_regulator_driver);
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}
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subsys_initcall(tps6586x_regulator_init);
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static void __exit tps6586x_regulator_exit(void)
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{
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platform_driver_unregister(&tps6586x_regulator_driver);
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}
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module_exit(tps6586x_regulator_exit);
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MODULE_LICENSE("GPL");
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MODULE_AUTHOR("Mike Rapoport <mike@compulab.co.il>");
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MODULE_DESCRIPTION("Regulator Driver for TI TPS6586X PMIC");
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MODULE_ALIAS("platform:tps6586x-regulator");
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