684 строки
16 KiB
C
684 строки
16 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/delay.h>
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#include <linux/slab.h>
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#include <linux/mfd/tps6507x.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 milliVolts) */
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static const u16 VDCDCx_VSEL_table[] = {
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725, 750, 775, 800,
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825, 850, 875, 900,
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925, 950, 975, 1000,
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1025, 1050, 1075, 1100,
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1125, 1150, 1175, 1200,
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1225, 1250, 1275, 1300,
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1325, 1350, 1375, 1400,
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1425, 1450, 1475, 1500,
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1550, 1600, 1650, 1700,
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1750, 1800, 1850, 1900,
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1950, 2000, 2050, 2100,
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2150, 2200, 2250, 2300,
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2350, 2400, 2450, 2500,
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2550, 2600, 2650, 2700,
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2750, 2800, 2850, 2900,
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3000, 3100, 3200, 3300,
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};
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static const u16 LDO1_VSEL_table[] = {
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1000, 1100, 1200, 1250,
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1300, 1350, 1400, 1500,
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1600, 1800, 2500, 2750,
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2800, 3000, 3100, 3300,
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};
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static const u16 LDO2_VSEL_table[] = {
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725, 750, 775, 800,
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825, 850, 875, 900,
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925, 950, 975, 1000,
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1025, 1050, 1075, 1100,
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1125, 1150, 1175, 1200,
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1225, 1250, 1275, 1300,
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1325, 1350, 1375, 1400,
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1425, 1450, 1475, 1500,
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1550, 1600, 1650, 1700,
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1750, 1800, 1850, 1900,
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1950, 2000, 2050, 2100,
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2150, 2200, 2250, 2300,
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2350, 2400, 2450, 2500,
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2550, 2600, 2650, 2700,
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2750, 2800, 2850, 2900,
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3000, 3100, 3200, 3300,
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};
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static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDCx_VSEL_table),
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ARRAY_SIZE(VDCDCx_VSEL_table),
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ARRAY_SIZE(VDCDCx_VSEL_table),
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ARRAY_SIZE(LDO1_VSEL_table),
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ARRAY_SIZE(LDO2_VSEL_table)};
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struct tps_info {
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const char *name;
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unsigned min_uV;
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unsigned max_uV;
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u8 table_len;
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const u16 *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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.min_uV = 725000,
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.max_uV = 3300000,
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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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.min_uV = 725000,
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.max_uV = 3300000,
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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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.min_uV = 725000,
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.max_uV = 3300000,
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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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.min_uV = 1000000,
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.max_uV = 3300000,
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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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.min_uV = 725000,
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.max_uV = 3300000,
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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 regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
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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_dcdc_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, dcdc = rdev_get_id(dev);
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u8 shift;
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if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - dcdc;
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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_ldo_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, ldo = rdev_get_id(dev);
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u8 shift;
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if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - ldo;
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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_dcdc_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 dcdc = rdev_get_id(dev);
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u8 shift;
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if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - dcdc;
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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_dcdc_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 dcdc = rdev_get_id(dev);
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u8 shift;
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if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - dcdc;
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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_ldo_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 ldo = rdev_get_id(dev);
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u8 shift;
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if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - ldo;
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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_ldo_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 ldo = rdev_get_id(dev);
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u8 shift;
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if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
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return -EINVAL;
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shift = TPS6507X_MAX_REG_ID - ldo;
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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_dcdc_get_voltage(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, dcdc = rdev_get_id(dev);
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u8 reg;
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switch (dcdc) {
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case TPS6507X_DCDC_1:
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reg = TPS6507X_REG_DEFDCDC1;
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break;
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case TPS6507X_DCDC_2:
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if (tps->info[dcdc]->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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break;
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case TPS6507X_DCDC_3:
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if (tps->info[dcdc]->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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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 &= TPS6507X_DEFDCDCX_DCDC_MASK;
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return tps->info[dcdc]->table[data] * 1000;
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}
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static int tps6507x_pmic_dcdc_set_voltage(struct regulator_dev *dev,
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int min_uV, int max_uV,
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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, vsel, dcdc = rdev_get_id(dev);
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u8 reg;
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switch (dcdc) {
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case TPS6507X_DCDC_1:
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reg = TPS6507X_REG_DEFDCDC1;
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break;
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case TPS6507X_DCDC_2:
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if (tps->info[dcdc]->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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break;
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case TPS6507X_DCDC_3:
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if (tps->info[dcdc]->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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break;
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default:
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return -EINVAL;
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}
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if (min_uV < tps->info[dcdc]->min_uV
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|| min_uV > tps->info[dcdc]->max_uV)
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return -EINVAL;
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if (max_uV < tps->info[dcdc]->min_uV
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|| max_uV > tps->info[dcdc]->max_uV)
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return -EINVAL;
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for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
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int mV = tps->info[dcdc]->table[vsel];
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int uV = mV * 1000;
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/* Break at the first in-range value */
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if (min_uV <= uV && uV <= max_uV)
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break;
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}
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/* write to the register in case we found a match */
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if (vsel == tps->info[dcdc]->table_len)
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return -EINVAL;
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*selector = vsel;
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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 &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
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data |= vsel;
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return tps6507x_pmic_reg_write(tps, reg, data);
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}
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static int tps6507x_pmic_ldo_get_voltage(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, ldo = rdev_get_id(dev);
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u8 reg, mask;
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if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
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return -EINVAL;
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else {
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reg = (ldo == TPS6507X_LDO_1 ?
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TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
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mask = (ldo == TPS6507X_LDO_1 ?
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TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
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TPS6507X_REG_DEFLDO2_LDO2_MASK);
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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 tps->info[ldo]->table[data] * 1000;
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}
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static int tps6507x_pmic_ldo_set_voltage(struct regulator_dev *dev,
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int min_uV, int max_uV,
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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, vsel, ldo = rdev_get_id(dev);
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u8 reg, mask;
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if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
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return -EINVAL;
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else {
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reg = (ldo == TPS6507X_LDO_1 ?
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TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
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mask = (ldo == TPS6507X_LDO_1 ?
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TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
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TPS6507X_REG_DEFLDO2_LDO2_MASK);
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}
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if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
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return -EINVAL;
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if (max_uV < tps->info[ldo]->min_uV || max_uV > tps->info[ldo]->max_uV)
|
|
return -EINVAL;
|
|
|
|
for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
|
|
int mV = tps->info[ldo]->table[vsel];
|
|
int uV = mV * 1000;
|
|
|
|
/* Break at the first in-range value */
|
|
if (min_uV <= uV && uV <= max_uV)
|
|
break;
|
|
}
|
|
|
|
if (vsel == tps->info[ldo]->table_len)
|
|
return -EINVAL;
|
|
|
|
*selector = vsel;
|
|
|
|
data = tps6507x_pmic_reg_read(tps, reg);
|
|
if (data < 0)
|
|
return data;
|
|
|
|
data &= ~mask;
|
|
data |= vsel;
|
|
|
|
return tps6507x_pmic_reg_write(tps, reg, data);
|
|
}
|
|
|
|
static int tps6507x_pmic_dcdc_list_voltage(struct regulator_dev *dev,
|
|
unsigned selector)
|
|
{
|
|
struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
|
|
int dcdc = rdev_get_id(dev);
|
|
|
|
if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
|
|
return -EINVAL;
|
|
|
|
if (selector >= tps->info[dcdc]->table_len)
|
|
return -EINVAL;
|
|
else
|
|
return tps->info[dcdc]->table[selector] * 1000;
|
|
}
|
|
|
|
static int tps6507x_pmic_ldo_list_voltage(struct regulator_dev *dev,
|
|
unsigned selector)
|
|
{
|
|
struct tps6507x_pmic *tps = rdev_get_drvdata(dev);
|
|
int ldo = rdev_get_id(dev);
|
|
|
|
if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
|
|
return -EINVAL;
|
|
|
|
if (selector >= tps->info[ldo]->table_len)
|
|
return -EINVAL;
|
|
else
|
|
return tps->info[ldo]->table[selector] * 1000;
|
|
}
|
|
|
|
/* Operations permitted on VDCDCx */
|
|
static struct regulator_ops tps6507x_pmic_dcdc_ops = {
|
|
.is_enabled = tps6507x_pmic_dcdc_is_enabled,
|
|
.enable = tps6507x_pmic_dcdc_enable,
|
|
.disable = tps6507x_pmic_dcdc_disable,
|
|
.get_voltage = tps6507x_pmic_dcdc_get_voltage,
|
|
.set_voltage = tps6507x_pmic_dcdc_set_voltage,
|
|
.list_voltage = tps6507x_pmic_dcdc_list_voltage,
|
|
};
|
|
|
|
/* Operations permitted on LDOx */
|
|
static struct regulator_ops tps6507x_pmic_ldo_ops = {
|
|
.is_enabled = tps6507x_pmic_ldo_is_enabled,
|
|
.enable = tps6507x_pmic_ldo_enable,
|
|
.disable = tps6507x_pmic_ldo_disable,
|
|
.get_voltage = tps6507x_pmic_ldo_get_voltage,
|
|
.set_voltage = tps6507x_pmic_ldo_set_voltage,
|
|
.list_voltage = tps6507x_pmic_ldo_list_voltage,
|
|
};
|
|
|
|
static __devinit
|
|
int tps6507x_pmic_probe(struct platform_device *pdev)
|
|
{
|
|
struct tps6507x_dev *tps6507x_dev = dev_get_drvdata(pdev->dev.parent);
|
|
static int desc_id;
|
|
struct tps_info *info = &tps6507x_pmic_regs[0];
|
|
struct regulator_init_data *init_data;
|
|
struct regulator_dev *rdev;
|
|
struct tps6507x_pmic *tps;
|
|
struct tps6507x_board *tps_board;
|
|
int i;
|
|
int error;
|
|
|
|
/**
|
|
* tps_board points to pmic related constants
|
|
* coming from the board-evm file.
|
|
*/
|
|
|
|
tps_board = dev_get_platdata(tps6507x_dev->dev);
|
|
if (!tps_board)
|
|
return -EINVAL;
|
|
|
|
/**
|
|
* init_data points to array of regulator_init structures
|
|
* coming from the board-evm file.
|
|
*/
|
|
init_data = tps_board->tps6507x_pmic_init_data;
|
|
if (!init_data)
|
|
return -EINVAL;
|
|
|
|
tps = kzalloc(sizeof(*tps), GFP_KERNEL);
|
|
if (!tps)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&tps->io_lock);
|
|
|
|
/* common for all regulators */
|
|
tps->mfd = tps6507x_dev;
|
|
|
|
for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
|
|
/* Register the regulators */
|
|
tps->info[i] = info;
|
|
if (init_data->driver_data) {
|
|
struct tps6507x_reg_platform_data *data =
|
|
init_data->driver_data;
|
|
tps->info[i]->defdcdc_default = data->defdcdc_default;
|
|
}
|
|
|
|
tps->desc[i].name = info->name;
|
|
tps->desc[i].id = desc_id++;
|
|
tps->desc[i].n_voltages = num_voltages[i];
|
|
tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
|
|
&tps6507x_pmic_ldo_ops : &tps6507x_pmic_dcdc_ops);
|
|
tps->desc[i].type = REGULATOR_VOLTAGE;
|
|
tps->desc[i].owner = THIS_MODULE;
|
|
|
|
rdev = regulator_register(&tps->desc[i],
|
|
tps6507x_dev->dev, init_data, tps);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(tps6507x_dev->dev,
|
|
"failed to register %s regulator\n",
|
|
pdev->name);
|
|
error = PTR_ERR(rdev);
|
|
goto fail;
|
|
}
|
|
|
|
/* Save regulator for cleanup */
|
|
tps->rdev[i] = rdev;
|
|
}
|
|
|
|
tps6507x_dev->pmic = tps;
|
|
platform_set_drvdata(pdev, tps6507x_dev);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
while (--i >= 0)
|
|
regulator_unregister(tps->rdev[i]);
|
|
|
|
kfree(tps);
|
|
return error;
|
|
}
|
|
|
|
static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
|
|
{
|
|
struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
|
|
struct tps6507x_pmic *tps = tps6507x_dev->pmic;
|
|
int i;
|
|
|
|
for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
|
|
regulator_unregister(tps->rdev[i]);
|
|
|
|
kfree(tps);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct platform_driver tps6507x_pmic_driver = {
|
|
.driver = {
|
|
.name = "tps6507x-pmic",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tps6507x_pmic_probe,
|
|
.remove = __devexit_p(tps6507x_pmic_remove),
|
|
};
|
|
|
|
/**
|
|
* tps6507x_pmic_init
|
|
*
|
|
* Module init function
|
|
*/
|
|
static int __init tps6507x_pmic_init(void)
|
|
{
|
|
return platform_driver_register(&tps6507x_pmic_driver);
|
|
}
|
|
subsys_initcall(tps6507x_pmic_init);
|
|
|
|
/**
|
|
* tps6507x_pmic_cleanup
|
|
*
|
|
* Module exit function
|
|
*/
|
|
static void __exit tps6507x_pmic_cleanup(void)
|
|
{
|
|
platform_driver_unregister(&tps6507x_pmic_driver);
|
|
}
|
|
module_exit(tps6507x_pmic_cleanup);
|
|
|
|
MODULE_AUTHOR("Texas Instruments");
|
|
MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|
|
MODULE_ALIAS("platform:tps6507x-pmic");
|