469 lines
11 KiB
C
469 lines
11 KiB
C
/*
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* tps6507x-regulator.c
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*
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* Regulator driver for TPS65073 PMIC
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*
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* Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation version 2.
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*
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* This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
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* whether express or implied; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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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/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/tps6507x.h>
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#include <linux/of.h>
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#include <linux/slab.h>
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#include <linux/mfd/tps6507x.h>
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#include <linux/regulator/of_regulator.h>
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/* DCDC's */
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#define TPS6507X_DCDC_1 0
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#define TPS6507X_DCDC_2 1
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#define TPS6507X_DCDC_3 2
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/* LDOs */
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#define TPS6507X_LDO_1 3
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#define TPS6507X_LDO_2 4
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#define TPS6507X_MAX_REG_ID TPS6507X_LDO_2
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/* Number of step-down converters available */
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#define TPS6507X_NUM_DCDC 3
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/* Number of LDO voltage regulators available */
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#define TPS6507X_NUM_LDO 2
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/* Number of total regulators available */
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#define TPS6507X_NUM_REGULATOR (TPS6507X_NUM_DCDC + TPS6507X_NUM_LDO)
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/* Supported voltage values for regulators (in microVolts) */
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static const unsigned int VDCDCx_VSEL_table[] = {
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725000, 750000, 775000, 800000,
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825000, 850000, 875000, 900000,
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925000, 950000, 975000, 1000000,
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1025000, 1050000, 1075000, 1100000,
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1125000, 1150000, 1175000, 1200000,
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1225000, 1250000, 1275000, 1300000,
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1325000, 1350000, 1375000, 1400000,
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1425000, 1450000, 1475000, 1500000,
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1550000, 1600000, 1650000, 1700000,
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1750000, 1800000, 1850000, 1900000,
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1950000, 2000000, 2050000, 2100000,
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2150000, 2200000, 2250000, 2300000,
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2350000, 2400000, 2450000, 2500000,
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2550000, 2600000, 2650000, 2700000,
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2750000, 2800000, 2850000, 2900000,
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3000000, 3100000, 3200000, 3300000,
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};
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static const unsigned int LDO1_VSEL_table[] = {
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1000000, 1100000, 1200000, 1250000,
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1300000, 1350000, 1400000, 1500000,
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1600000, 1800000, 2500000, 2750000,
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2800000, 3000000, 3100000, 3300000,
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};
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/* The voltage mapping table for LDO2 is the same as VDCDCx */
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#define LDO2_VSEL_table VDCDCx_VSEL_table
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struct tps_info {
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const char *name;
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u8 table_len;
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const unsigned int *table;
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/* Does DCDC high or the low register defines output voltage? */
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bool defdcdc_default;
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};
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static struct tps_info tps6507x_pmic_regs[] = {
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{
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.name = "VDCDC1",
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.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
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.table = VDCDCx_VSEL_table,
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},
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{
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.name = "VDCDC2",
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.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
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.table = VDCDCx_VSEL_table,
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},
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{
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.name = "VDCDC3",
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.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
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.table = VDCDCx_VSEL_table,
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},
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{
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.name = "LDO1",
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.table_len = ARRAY_SIZE(LDO1_VSEL_table),
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.table = LDO1_VSEL_table,
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},
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{
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.name = "LDO2",
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.table_len = ARRAY_SIZE(LDO2_VSEL_table),
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.table = LDO2_VSEL_table,
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},
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};
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struct tps6507x_pmic {
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struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
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struct tps6507x_dev *mfd;
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struct tps_info *info[TPS6507X_NUM_REGULATOR];
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struct mutex io_lock;
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};
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static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
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{
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u8 val;
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int err;
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err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
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if (err)
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return err;
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return val;
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}
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static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
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{
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return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
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}
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static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
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{
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int err, data;
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mutex_lock(&tps->io_lock);
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data = tps6507x_pmic_read(tps, reg);
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if (data < 0) {
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dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
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err = data;
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goto out;
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}
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data |= mask;
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err = tps6507x_pmic_write(tps, reg, data);
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if (err)
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dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
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out:
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mutex_unlock(&tps->io_lock);
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return err;
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}
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static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
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{
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int err, data;
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mutex_lock(&tps->io_lock);
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data = tps6507x_pmic_read(tps, reg);
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if (data < 0) {
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dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
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err = data;
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goto out;
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}
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data &= ~mask;
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err = tps6507x_pmic_write(tps, reg, data);
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if (err)
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dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
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out:
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mutex_unlock(&tps->io_lock);
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return err;
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}
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static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
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{
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int data;
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mutex_lock(&tps->io_lock);
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data = tps6507x_pmic_read(tps, reg);
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if (data < 0)
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dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
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mutex_unlock(&tps->io_lock);
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return data;
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}
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static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
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{
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int err;
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mutex_lock(&tps->io_lock);
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err = tps6507x_pmic_write(tps, reg, val);
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if (err < 0)
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dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
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mutex_unlock(&tps->io_lock);
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return err;
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}
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static int tps6507x_pmic_is_enabled(struct regulator_dev *dev)
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{
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struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
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int data, rid = rdev_get_id(dev);
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u8 shift;
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if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - rid;
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data = tps6507x_pmic_reg_read(tps, TPS6507X_REG_CON_CTRL1);
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if (data < 0)
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return data;
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else
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return (data & 1<<shift) ? 1 : 0;
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}
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static int tps6507x_pmic_enable(struct regulator_dev *dev)
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{
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struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
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int rid = rdev_get_id(dev);
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u8 shift;
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if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - rid;
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return tps6507x_pmic_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
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}
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static int tps6507x_pmic_disable(struct regulator_dev *dev)
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{
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struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
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int rid = rdev_get_id(dev);
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u8 shift;
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if (rid < TPS6507X_DCDC_1 || rid > TPS6507X_LDO_2)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - rid;
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return tps6507x_pmic_clear_bits(tps, TPS6507X_REG_CON_CTRL1,
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1 << shift);
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}
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static int tps6507x_pmic_get_voltage_sel(struct regulator_dev *dev)
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{
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struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
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int data, rid = rdev_get_id(dev);
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u8 reg, mask;
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switch (rid) {
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case TPS6507X_DCDC_1:
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reg = TPS6507X_REG_DEFDCDC1;
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mask = TPS6507X_DEFDCDCX_DCDC_MASK;
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break;
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case TPS6507X_DCDC_2:
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if (tps->info[rid]->defdcdc_default)
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reg = TPS6507X_REG_DEFDCDC2_HIGH;
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else
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reg = TPS6507X_REG_DEFDCDC2_LOW;
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mask = TPS6507X_DEFDCDCX_DCDC_MASK;
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break;
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case TPS6507X_DCDC_3:
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if (tps->info[rid]->defdcdc_default)
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reg = TPS6507X_REG_DEFDCDC3_HIGH;
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else
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reg = TPS6507X_REG_DEFDCDC3_LOW;
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mask = TPS6507X_DEFDCDCX_DCDC_MASK;
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break;
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case TPS6507X_LDO_1:
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reg = TPS6507X_REG_LDO_CTRL1;
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mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
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break;
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case TPS6507X_LDO_2:
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reg = TPS6507X_REG_DEFLDO2;
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mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
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break;
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default:
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return -EINVAL;
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}
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data = tps6507x_pmic_reg_read(tps, reg);
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if (data < 0)
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return data;
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data &= mask;
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return data;
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}
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static int tps6507x_pmic_set_voltage_sel(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
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int data, rid = rdev_get_id(dev);
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u8 reg, mask;
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switch (rid) {
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case TPS6507X_DCDC_1:
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reg = TPS6507X_REG_DEFDCDC1;
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mask = TPS6507X_DEFDCDCX_DCDC_MASK;
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break;
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case TPS6507X_DCDC_2:
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if (tps->info[rid]->defdcdc_default)
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reg = TPS6507X_REG_DEFDCDC2_HIGH;
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else
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reg = TPS6507X_REG_DEFDCDC2_LOW;
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mask = TPS6507X_DEFDCDCX_DCDC_MASK;
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break;
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case TPS6507X_DCDC_3:
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if (tps->info[rid]->defdcdc_default)
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reg = TPS6507X_REG_DEFDCDC3_HIGH;
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else
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reg = TPS6507X_REG_DEFDCDC3_LOW;
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mask = TPS6507X_DEFDCDCX_DCDC_MASK;
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break;
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case TPS6507X_LDO_1:
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reg = TPS6507X_REG_LDO_CTRL1;
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mask = TPS6507X_REG_LDO_CTRL1_LDO1_MASK;
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break;
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case TPS6507X_LDO_2:
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reg = TPS6507X_REG_DEFLDO2;
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mask = TPS6507X_REG_DEFLDO2_LDO2_MASK;
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break;
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default:
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return -EINVAL;
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}
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data = tps6507x_pmic_reg_read(tps, reg);
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if (data < 0)
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return data;
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data &= ~mask;
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data |= selector;
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return tps6507x_pmic_reg_write(tps, reg, data);
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}
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static const struct regulator_ops tps6507x_pmic_ops = {
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.is_enabled = tps6507x_pmic_is_enabled,
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.enable = tps6507x_pmic_enable,
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.disable = tps6507x_pmic_disable,
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.get_voltage_sel = tps6507x_pmic_get_voltage_sel,
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.set_voltage_sel = tps6507x_pmic_set_voltage_sel,
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.list_voltage = regulator_list_voltage_table,
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.map_voltage = regulator_map_voltage_ascend,
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};
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static int tps6507x_pmic_of_parse_cb(struct device_node *np,
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const struct regulator_desc *desc,
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struct regulator_config *config)
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{
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struct tps6507x_pmic *tps = config->driver_data;
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struct tps_info *info = tps->info[desc->id];
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u32 prop;
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int ret;
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ret = of_property_read_u32(np, "ti,defdcdc_default", &prop);
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if (!ret)
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info->defdcdc_default = prop;
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return 0;
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}
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static int tps6507x_pmic_probe(struct platform_device *pdev)
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{
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struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
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struct tps_info *info = &tps6507x_pmic_regs[0];
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struct regulator_config config = { };
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struct regulator_init_data *init_data = NULL;
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struct regulator_dev *rdev;
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struct tps6507x_pmic *tps;
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struct tps6507x_board *tps_board;
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int i;
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/**
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* tps_board points to pmic related constants
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* coming from the board-evm file.
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*/
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tps_board = dev_get_platdata(tps6507x_dev->dev);
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if (tps_board)
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init_data = tps_board->tps6507x_pmic_init_data;
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tps = devm_kzalloc(&pdev->dev, sizeof(*tps), GFP_KERNEL);
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if (!tps)
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return -ENOMEM;
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mutex_init(&tps->io_lock);
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/* common for all regulators */
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tps->mfd = tps6507x_dev;
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for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++) {
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/* Register the regulators */
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tps->info[i] = info;
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if (init_data && init_data[i].driver_data) {
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struct tps6507x_reg_platform_data *data =
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init_data[i].driver_data;
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info->defdcdc_default = data->defdcdc_default;
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}
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tps->desc[i].name = info->name;
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tps->desc[i].of_match = of_match_ptr(info->name);
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tps->desc[i].regulators_node = of_match_ptr("regulators");
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tps->desc[i].of_parse_cb = tps6507x_pmic_of_parse_cb;
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tps->desc[i].id = i;
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tps->desc[i].n_voltages = info->table_len;
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tps->desc[i].volt_table = info->table;
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tps->desc[i].ops = &tps6507x_pmic_ops;
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tps->desc[i].type = REGULATOR_VOLTAGE;
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tps->desc[i].owner = THIS_MODULE;
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config.dev = tps6507x_dev->dev;
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config.init_data = init_data;
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config.driver_data = tps;
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rdev = devm_regulator_register(&pdev->dev, &tps->desc[i],
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&config);
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if (IS_ERR(rdev)) {
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dev_err(tps6507x_dev->dev,
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"failed to register %s regulator\n",
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pdev->name);
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return PTR_ERR(rdev);
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}
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}
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tps6507x_dev->pmic = tps;
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platform_set_drvdata(pdev, tps6507x_dev);
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return 0;
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}
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static struct platform_driver tps6507x_pmic_driver = {
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.driver = {
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.name = "tps6507x-pmic",
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},
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.probe = tps6507x_pmic_probe,
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};
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static int __init tps6507x_pmic_init(void)
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{
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return platform_driver_register(&tps6507x_pmic_driver);
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}
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subsys_initcall(tps6507x_pmic_init);
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static void __exit tps6507x_pmic_cleanup(void)
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{
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platform_driver_unregister(&tps6507x_pmic_driver);
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}
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module_exit(tps6507x_pmic_cleanup);
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MODULE_AUTHOR("Texas Instruments");
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MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:tps6507x-pmic");
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