628 lines
15 KiB
C
628 lines
15 KiB
C
/*
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* tps65023-regulator.c
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*
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* Supports TPS65023 Regulator
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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/i2c.h>
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#include <linux/delay.h>
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#include <linux/slab.h>
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/* Register definitions */
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#define TPS65023_REG_VERSION 0
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#define TPS65023_REG_PGOODZ 1
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#define TPS65023_REG_MASK 2
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#define TPS65023_REG_REG_CTRL 3
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#define TPS65023_REG_CON_CTRL 4
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#define TPS65023_REG_CON_CTRL2 5
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#define TPS65023_REG_DEF_CORE 6
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#define TPS65023_REG_DEFSLEW 7
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#define TPS65023_REG_LDO_CTRL 8
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/* PGOODZ bitfields */
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#define TPS65023_PGOODZ_PWRFAILZ BIT(7)
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#define TPS65023_PGOODZ_LOWBATTZ BIT(6)
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#define TPS65023_PGOODZ_VDCDC1 BIT(5)
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#define TPS65023_PGOODZ_VDCDC2 BIT(4)
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#define TPS65023_PGOODZ_VDCDC3 BIT(3)
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#define TPS65023_PGOODZ_LDO2 BIT(2)
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#define TPS65023_PGOODZ_LDO1 BIT(1)
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/* MASK bitfields */
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#define TPS65023_MASK_PWRFAILZ BIT(7)
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#define TPS65023_MASK_LOWBATTZ BIT(6)
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#define TPS65023_MASK_VDCDC1 BIT(5)
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#define TPS65023_MASK_VDCDC2 BIT(4)
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#define TPS65023_MASK_VDCDC3 BIT(3)
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#define TPS65023_MASK_LDO2 BIT(2)
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#define TPS65023_MASK_LDO1 BIT(1)
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/* REG_CTRL bitfields */
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#define TPS65023_REG_CTRL_VDCDC1_EN BIT(5)
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#define TPS65023_REG_CTRL_VDCDC2_EN BIT(4)
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#define TPS65023_REG_CTRL_VDCDC3_EN BIT(3)
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#define TPS65023_REG_CTRL_LDO2_EN BIT(2)
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#define TPS65023_REG_CTRL_LDO1_EN BIT(1)
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/* LDO_CTRL bitfields */
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#define TPS65023_LDO_CTRL_LDOx_SHIFT(ldo_id) ((ldo_id)*4)
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#define TPS65023_LDO_CTRL_LDOx_MASK(ldo_id) (0xF0 >> ((ldo_id)*4))
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/* Number of step-down converters available */
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#define TPS65023_NUM_DCDC 3
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/* Number of LDO voltage regulators available */
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#define TPS65023_NUM_LDO 2
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/* Number of total regulators available */
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#define TPS65023_NUM_REGULATOR (TPS65023_NUM_DCDC + TPS65023_NUM_LDO)
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/* DCDCs */
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#define TPS65023_DCDC_1 0
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#define TPS65023_DCDC_2 1
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#define TPS65023_DCDC_3 2
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/* LDOs */
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#define TPS65023_LDO_1 3
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#define TPS65023_LDO_2 4
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#define TPS65023_MAX_REG_ID TPS65023_LDO_2
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/* Supported voltage values for regulators */
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static const u16 VDCDC1_VSEL_table[] = {
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800, 825, 850, 875,
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900, 925, 950, 975,
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1000, 1025, 1050, 1075,
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1100, 1125, 1150, 1175,
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1200, 1225, 1250, 1275,
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1300, 1325, 1350, 1375,
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1400, 1425, 1450, 1475,
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1500, 1525, 1550, 1600,
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};
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static const u16 LDO1_VSEL_table[] = {
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1000, 1100, 1300, 1800,
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2200, 2600, 2800, 3150,
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};
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static const u16 LDO2_VSEL_table[] = {
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1050, 1200, 1300, 1800,
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2500, 2800, 3000, 3300,
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};
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static unsigned int num_voltages[] = {ARRAY_SIZE(VDCDC1_VSEL_table),
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0, 0, ARRAY_SIZE(LDO1_VSEL_table),
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ARRAY_SIZE(LDO2_VSEL_table)};
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/* Regulator specific details */
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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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bool fixed;
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u8 table_len;
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const u16 *table;
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};
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/* PMIC details */
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struct tps_pmic {
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struct regulator_desc desc[TPS65023_NUM_REGULATOR];
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struct i2c_client *client;
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struct regulator_dev *rdev[TPS65023_NUM_REGULATOR];
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const struct tps_info *info[TPS65023_NUM_REGULATOR];
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struct mutex io_lock;
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};
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static inline int tps_65023_read(struct tps_pmic *tps, u8 reg)
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{
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return i2c_smbus_read_byte_data(tps->client, reg);
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}
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static inline int tps_65023_write(struct tps_pmic *tps, u8 reg, u8 val)
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{
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return i2c_smbus_write_byte_data(tps->client, reg, val);
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}
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static int tps_65023_set_bits(struct tps_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 = tps_65023_read(tps, reg);
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if (data < 0) {
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dev_err(&tps->client->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 = tps_65023_write(tps, reg, data);
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if (err)
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dev_err(&tps->client->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 tps_65023_clear_bits(struct tps_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 = tps_65023_read(tps, reg);
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if (data < 0) {
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dev_err(&tps->client->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 = tps_65023_write(tps, reg, data);
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if (err)
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dev_err(&tps->client->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 tps_65023_reg_read(struct tps_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 = tps_65023_read(tps, reg);
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if (data < 0)
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dev_err(&tps->client->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 tps_65023_reg_write(struct tps_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 = tps_65023_write(tps, reg, val);
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if (err < 0)
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dev_err(&tps->client->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 tps65023_dcdc_is_enabled(struct regulator_dev *dev)
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{
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struct tps_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 < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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shift = TPS65023_NUM_REGULATOR - dcdc;
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data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL);
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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 tps65023_ldo_is_enabled(struct regulator_dev *dev)
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{
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struct tps_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 < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
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data = tps_65023_reg_read(tps, TPS65023_REG_REG_CTRL);
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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 tps65023_dcdc_enable(struct regulator_dev *dev)
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{
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struct tps_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 < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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shift = TPS65023_NUM_REGULATOR - dcdc;
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return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
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}
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static int tps65023_dcdc_disable(struct regulator_dev *dev)
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{
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struct tps_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 < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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shift = TPS65023_NUM_REGULATOR - dcdc;
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return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
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}
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static int tps65023_ldo_enable(struct regulator_dev *dev)
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{
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struct tps_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 < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
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return tps_65023_set_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
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}
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static int tps65023_ldo_disable(struct regulator_dev *dev)
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{
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struct tps_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 < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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shift = (ldo == TPS65023_LDO_1 ? 1 : 2);
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return tps_65023_clear_bits(tps, TPS65023_REG_REG_CTRL, 1 << shift);
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}
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static int tps65023_dcdc_get_voltage(struct regulator_dev *dev)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int data, dcdc = rdev_get_id(dev);
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if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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if (dcdc == TPS65023_DCDC_1) {
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data = tps_65023_reg_read(tps, TPS65023_REG_DEF_CORE);
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if (data < 0)
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return data;
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data &= (tps->info[dcdc]->table_len - 1);
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return tps->info[dcdc]->table[data] * 1000;
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} else
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return tps->info[dcdc]->min_uV;
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}
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static int tps65023_dcdc_set_voltage(struct regulator_dev *dev,
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int min_uV, int max_uV)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int dcdc = rdev_get_id(dev);
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int vsel;
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if (dcdc != TPS65023_DCDC_1)
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return -EINVAL;
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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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else
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return tps_65023_reg_write(tps, TPS65023_REG_DEF_CORE, vsel);
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}
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static int tps65023_ldo_get_voltage(struct regulator_dev *dev)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int data, ldo = rdev_get_id(dev);
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if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL);
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if (data < 0)
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return data;
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data >>= (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1));
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data &= (tps->info[ldo]->table_len - 1);
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return tps->info[ldo]->table[data] * 1000;
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}
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static int tps65023_ldo_set_voltage(struct regulator_dev *dev,
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int min_uV, int max_uV)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int data, vsel, ldo = rdev_get_id(dev);
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if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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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)
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return -EINVAL;
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for (vsel = 0; vsel < tps->info[ldo]->table_len; vsel++) {
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int mV = tps->info[ldo]->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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if (vsel == tps->info[ldo]->table_len)
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return -EINVAL;
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data = tps_65023_reg_read(tps, TPS65023_REG_LDO_CTRL);
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if (data < 0)
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return data;
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data &= TPS65023_LDO_CTRL_LDOx_MASK(ldo - TPS65023_LDO_1);
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data |= (vsel << (TPS65023_LDO_CTRL_LDOx_SHIFT(ldo - TPS65023_LDO_1)));
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return tps_65023_reg_write(tps, TPS65023_REG_LDO_CTRL, data);
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}
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static int tps65023_dcdc_list_voltage(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int dcdc = rdev_get_id(dev);
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if (dcdc < TPS65023_DCDC_1 || dcdc > TPS65023_DCDC_3)
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return -EINVAL;
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if (dcdc == TPS65023_DCDC_1) {
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if (selector >= tps->info[dcdc]->table_len)
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return -EINVAL;
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else
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return tps->info[dcdc]->table[selector] * 1000;
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} else
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return tps->info[dcdc]->min_uV;
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}
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static int tps65023_ldo_list_voltage(struct regulator_dev *dev,
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unsigned selector)
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{
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struct tps_pmic *tps = rdev_get_drvdata(dev);
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int ldo = rdev_get_id(dev);
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if (ldo < TPS65023_LDO_1 || ldo > TPS65023_LDO_2)
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return -EINVAL;
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if (selector >= tps->info[ldo]->table_len)
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return -EINVAL;
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else
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return tps->info[ldo]->table[selector] * 1000;
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}
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/* Operations permitted on VDCDCx */
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static struct regulator_ops tps65023_dcdc_ops = {
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.is_enabled = tps65023_dcdc_is_enabled,
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.enable = tps65023_dcdc_enable,
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.disable = tps65023_dcdc_disable,
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.get_voltage = tps65023_dcdc_get_voltage,
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.set_voltage = tps65023_dcdc_set_voltage,
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.list_voltage = tps65023_dcdc_list_voltage,
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};
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/* Operations permitted on LDOx */
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static struct regulator_ops tps65023_ldo_ops = {
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.is_enabled = tps65023_ldo_is_enabled,
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.enable = tps65023_ldo_enable,
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.disable = tps65023_ldo_disable,
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.get_voltage = tps65023_ldo_get_voltage,
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.set_voltage = tps65023_ldo_set_voltage,
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.list_voltage = tps65023_ldo_list_voltage,
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};
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static int __devinit tps_65023_probe(struct i2c_client *client,
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const struct i2c_device_id *id)
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{
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static int desc_id;
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const struct tps_info *info = (void *)id->driver_data;
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struct regulator_init_data *init_data;
|
|
struct regulator_dev *rdev;
|
|
struct tps_pmic *tps;
|
|
int i;
|
|
int error;
|
|
|
|
if (!i2c_check_functionality(client->adapter, I2C_FUNC_SMBUS_BYTE_DATA))
|
|
return -EIO;
|
|
|
|
/**
|
|
* init_data points to array of regulator_init structures
|
|
* coming from the board-evm file.
|
|
*/
|
|
init_data = client->dev.platform_data;
|
|
if (!init_data)
|
|
return -EIO;
|
|
|
|
tps = kzalloc(sizeof(*tps), GFP_KERNEL);
|
|
if (!tps)
|
|
return -ENOMEM;
|
|
|
|
mutex_init(&tps->io_lock);
|
|
|
|
/* common for all regulators */
|
|
tps->client = client;
|
|
|
|
for (i = 0; i < TPS65023_NUM_REGULATOR; i++, info++, init_data++) {
|
|
/* Store regulator specific information */
|
|
tps->info[i] = info;
|
|
|
|
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 > TPS65023_DCDC_3 ?
|
|
&tps65023_ldo_ops : &tps65023_dcdc_ops);
|
|
tps->desc[i].type = REGULATOR_VOLTAGE;
|
|
tps->desc[i].owner = THIS_MODULE;
|
|
|
|
/* Register the regulators */
|
|
rdev = regulator_register(&tps->desc[i], &client->dev,
|
|
init_data, tps);
|
|
if (IS_ERR(rdev)) {
|
|
dev_err(&client->dev, "failed to register %s\n",
|
|
id->name);
|
|
error = PTR_ERR(rdev);
|
|
goto fail;
|
|
}
|
|
|
|
/* Save regulator for cleanup */
|
|
tps->rdev[i] = rdev;
|
|
}
|
|
|
|
i2c_set_clientdata(client, tps);
|
|
|
|
return 0;
|
|
|
|
fail:
|
|
while (--i >= 0)
|
|
regulator_unregister(tps->rdev[i]);
|
|
|
|
kfree(tps);
|
|
return error;
|
|
}
|
|
|
|
/**
|
|
* tps_65023_remove - TPS65023 driver i2c remove handler
|
|
* @client: i2c driver client device structure
|
|
*
|
|
* Unregister TPS driver as an i2c client device driver
|
|
*/
|
|
static int __devexit tps_65023_remove(struct i2c_client *client)
|
|
{
|
|
struct tps_pmic *tps = i2c_get_clientdata(client);
|
|
int i;
|
|
|
|
for (i = 0; i < TPS65023_NUM_REGULATOR; i++)
|
|
regulator_unregister(tps->rdev[i]);
|
|
|
|
kfree(tps);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct tps_info tps65023_regs[] = {
|
|
{
|
|
.name = "VDCDC1",
|
|
.min_uV = 800000,
|
|
.max_uV = 1600000,
|
|
.table_len = ARRAY_SIZE(VDCDC1_VSEL_table),
|
|
.table = VDCDC1_VSEL_table,
|
|
},
|
|
{
|
|
.name = "VDCDC2",
|
|
.min_uV = 3300000,
|
|
.max_uV = 3300000,
|
|
.fixed = 1,
|
|
},
|
|
{
|
|
.name = "VDCDC3",
|
|
.min_uV = 1800000,
|
|
.max_uV = 1800000,
|
|
.fixed = 1,
|
|
},
|
|
{
|
|
.name = "LDO1",
|
|
.min_uV = 1000000,
|
|
.max_uV = 3150000,
|
|
.table_len = ARRAY_SIZE(LDO1_VSEL_table),
|
|
.table = LDO1_VSEL_table,
|
|
},
|
|
{
|
|
.name = "LDO2",
|
|
.min_uV = 1050000,
|
|
.max_uV = 3300000,
|
|
.table_len = ARRAY_SIZE(LDO2_VSEL_table),
|
|
.table = LDO2_VSEL_table,
|
|
},
|
|
};
|
|
|
|
static const struct i2c_device_id tps_65023_id[] = {
|
|
{.name = "tps65023",
|
|
.driver_data = (unsigned long) tps65023_regs,},
|
|
{ },
|
|
};
|
|
|
|
MODULE_DEVICE_TABLE(i2c, tps_65023_id);
|
|
|
|
static struct i2c_driver tps_65023_i2c_driver = {
|
|
.driver = {
|
|
.name = "tps65023",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = tps_65023_probe,
|
|
.remove = __devexit_p(tps_65023_remove),
|
|
.id_table = tps_65023_id,
|
|
};
|
|
|
|
/**
|
|
* tps_65023_init
|
|
*
|
|
* Module init function
|
|
*/
|
|
static int __init tps_65023_init(void)
|
|
{
|
|
return i2c_add_driver(&tps_65023_i2c_driver);
|
|
}
|
|
subsys_initcall(tps_65023_init);
|
|
|
|
/**
|
|
* tps_65023_cleanup
|
|
*
|
|
* Module exit function
|
|
*/
|
|
static void __exit tps_65023_cleanup(void)
|
|
{
|
|
i2c_del_driver(&tps_65023_i2c_driver);
|
|
}
|
|
module_exit(tps_65023_cleanup);
|
|
|
|
MODULE_AUTHOR("Texas Instruments");
|
|
MODULE_DESCRIPTION("TPS65023 voltage regulator driver");
|
|
MODULE_LICENSE("GPL v2");
|