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Message-ID: <20090807202700.GE9780@nokia.com>
Date: Fri, 7 Aug 2009 23:27:00 +0300
From: Felipe Balbi <felipe.balbi@...ia.com>
To: ext Anuj Aggarwal <anuj.aggarwal@...com>
Cc: "broonie@...ena.org.uk" <broonie@...ena.org.uk>,
"lrg@...mlogic.co.uk" <lrg@...mlogic.co.uk>,
"linux-omap@...r.kernel.org" <linux-omap@...r.kernel.org>,
"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
linux-i2c@...r.kernel.org
Subject: Re: [PATCH 3/8] Regulator: Add TPS6507x regulator driver
On Fri, Aug 07, 2009 at 05:26:06PM +0200, ext Anuj Aggarwal wrote:
> Adding support for TI TPS6507x regulator driver
>
> Signed-off-by: Anuj Aggarwal <anuj.aggarwal@...com>
> ---
> drivers/regulator/tps6507x-regulator.c | 563 ++++++++++++++++++++++++++++++++
> 1 files changed, 563 insertions(+), 0 deletions(-)
> create mode 100644 drivers/regulator/tps6507x-regulator.c
>
> diff --git a/drivers/regulator/tps6507x-regulator.c b/drivers/regulator/tps6507x-regulator.c
> new file mode 100644
> index 0000000..c5e319c
> --- /dev/null
> +++ b/drivers/regulator/tps6507x-regulator.c
> @@ -0,0 +1,563 @@
> +/*
> + * tps6507x-regulator.c
> + *
> + * Regulator driver for TPS65073 PMIC
> + *
> + * Copyright (C) 2009 Texas Instrument Incorporated - http://www.ti.com/
> + *
> + * This program is free software; you can redistribute it and/or
> + * modify it under the terms of the GNU General Public License as
> + * published by the Free Software Foundation version 2.
> + *
> + * This program is distributed "as is" WITHOUT ANY WARRANTY of any kind,
> + * whether express or implied; without even the implied warranty of
> + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
> + * General Public License for more details.
> + */
> +
> +#include <linux/kernel.h>
> +#include <linux/module.h>
> +#include <linux/init.h>
> +#include <linux/err.h>
> +#include <linux/platform_device.h>
> +#include <linux/regulator/driver.h>
> +#include <linux/regulator/machine.h>
> +#include <linux/mfd/tps6507x.h>
> +#include <linux/i2c.h>
> +#include <linux/delay.h>
> +
> +struct tps_info {
> + const char *name;
> + unsigned min_uV;
> + unsigned max_uV;
> + bool fixed;
> + u8 table_len;
> + const u16 *table;
> +};
> +
> +struct tps_pmic {
> + struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
> + struct i2c_client *client;
> + struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
> + struct tps_info *info[TPS6507X_NUM_REGULATOR];
> +};
> +
> +static inline int tps_6507x_read_reg(struct tps_pmic *tps, u8 reg, u8 *val)
> +{
> + int status;
> +
> + status = i2c_smbus_read_byte_data(tps->client, reg);
> + *val = status;
> + if (status < 0)
> + return status;
> + return 0;
same comments as previous patch.
> +}
> +
> +static inline int tps_6507x_write_reg(struct tps_pmic *tps, u8 reg, u8 val)
> +{
> + return i2c_smbus_write_byte_data(tps->client, reg, val);
> +}
> +
> +static int tps_6507x_set_bits(struct tps_pmic *tps, u8 reg, u8 mask)
> +{
> + u8 data;
> + int err;
> +
> + err = tps_6507x_read_reg(tps, reg, &data);
> + if (err) {
> + pr_err("Read from reg 0x%x failed\n", reg);
> + return err;
> + }
> +
> + data |= mask;
> +
> + return tps_6507x_write_reg(tps, reg, data);
> +}
> +
> +static int tps_6507x_clear_bits(struct tps_pmic *tps, u8 reg, u8 mask)
> +{
> + u8 data;
> + int err;
> +
> + err = tps_6507x_read_reg(tps, reg, &data);
> + if (err) {
> + pr_err("Read from reg 0x%x failed\n", reg);
> + return err;
> + }
> +
> + data &= ~mask;
> +
> + return tps_6507x_write_reg(tps, reg, data);
> +}
> +
> +static int tps6507x_dcdc_is_enabled(struct regulator_dev *dev)
> +{
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int dcdc = rdev_get_id(dev);
> + int ret;
> + u8 shift;
> + unsigned char reg_ctrl;
> +
> + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
> + return -EINVAL;
> +
> + shift = TPS6507X_MAX_REG_ID - dcdc;
> + ret = tps_6507x_read_reg(tps, TPS6507X_REG_CON_CTRL1, ®_ctrl);
> +
> + if (ret == 0) {
> + reg_ctrl &= (1 << shift);
> + return reg_ctrl ? 1 : 0;
> + } else
> + return ret;
> +}
> +
> +static int tps6507x_ldo_is_enabled(struct regulator_dev *dev)
> +{
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int ldo = rdev_get_id(dev);
> + int ret;
> + u8 shift;
> + unsigned char reg_ctrl;
> +
> + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
> + return -EINVAL;
> +
> + shift = TPS6507X_MAX_REG_ID - ldo;
> + ret = tps_6507x_read_reg(tps, TPS6507X_REG_CON_CTRL1, ®_ctrl);
> +
> + if (ret == 0) {
> + reg_ctrl &= (1 << shift);
> + return reg_ctrl ? 1 : 0;
> + } else
> + return ret;
> +}
> +
> +static int tps6507x_dcdc_enable(struct regulator_dev *dev)
> +{
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int dcdc = rdev_get_id(dev);
> + u8 shift;
> +
> + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
> + return -EINVAL;
> +
> + shift = TPS6507X_MAX_REG_ID - dcdc;
> + return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
> +}
> +
> +static int tps6507x_dcdc_disable(struct regulator_dev *dev)
> +{
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int dcdc = rdev_get_id(dev);
> + u8 shift;
> +
> + if (dcdc < TPS6507X_DCDC_1 || dcdc > TPS6507X_DCDC_3)
> + return -EINVAL;
> +
> + shift = TPS6507X_MAX_REG_ID - dcdc;
> + return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
> +}
> +
> +static int tps6507x_ldo_enable(struct regulator_dev *dev)
> +{
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int ldo = rdev_get_id(dev);
> + u8 shift;
> +
> + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
> + return -EINVAL;
> +
> + shift = TPS6507X_MAX_REG_ID - ldo;
> + return tps_6507x_set_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
> +}
> +
> +static int tps6507x_ldo_disable(struct regulator_dev *dev)
> +{
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int ldo = rdev_get_id(dev);
> + u8 shift;
> +
> + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
> + return -EINVAL;
> +
> + shift = TPS6507X_MAX_REG_ID - ldo;
> + return tps_6507x_clear_bits(tps, TPS6507X_REG_CON_CTRL1, 1 << shift);
> +}
> +
> +static int tps6507x_dcdc_get_voltage(struct regulator_dev *dev)
> +{
> + unsigned char reg_ctrl;
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int dcdc = rdev_get_id(dev);
> + u8 reg;
> + int ret;
> +
> + switch (dcdc) {
> + case TPS6507X_DCDC_1:
> + reg = TPS6507X_REG_DEFDCDC1;
> + break;
> + case TPS6507X_DCDC_2:
> + reg = TPS6507X_REG_DEFDCDC2_LOW;
> + break;
> + case TPS6507X_DCDC_3:
> + reg = TPS6507X_REG_DEFDCDC3_LOW;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + ret = tps_6507x_read_reg(tps, reg, ®_ctrl);
> + if (ret < 0)
> + return ret;
> +
> + reg_ctrl &= TPS6507X_DEFDCDCX_DCDC_MASK;
> + return tps->info[dcdc]->table[reg_ctrl] * 1000;
> +}
> +
> +static int tps6507x_dcdc_set_voltage(struct regulator_dev *dev,
> + int min_uV, int max_uV)
> +{
> + unsigned char reg_ctrl;
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int dcdc = rdev_get_id(dev);
> + u8 reg;
> + int vsel, ret;
> +
> + switch (dcdc) {
> + case TPS6507X_DCDC_1:
> + reg = TPS6507X_REG_DEFDCDC1;
> + break;
> + case TPS6507X_DCDC_2:
> + reg = TPS6507X_REG_DEFDCDC2_LOW;
> + break;
> + case TPS6507X_DCDC_3:
> + reg = TPS6507X_REG_DEFDCDC3_LOW;
> + break;
> + default:
> + return -EINVAL;
> + }
> +
> + if (min_uV < tps->info[dcdc]->min_uV
> + || min_uV > tps->info[dcdc]->max_uV)
> + return -EINVAL;
> + if (max_uV < tps->info[dcdc]->min_uV
> + || max_uV > tps->info[dcdc]->max_uV)
> + return -EINVAL;
> +
> + for (vsel = 0; vsel < tps->info[dcdc]->table_len; vsel++) {
> + int mV = tps->info[dcdc]->table[vsel];
> + int uV = mV * 1000;
> +
> + /* Break at the first in-range value */
> + if (min_uV <= uV && uV <= max_uV)
> + break;
> + }
> +
> + ret = tps_6507x_read_reg(tps, reg, ®_ctrl);
> + if (ret < 0)
> + return ret;
> +
> + reg_ctrl &= ~TPS6507X_DEFDCDCX_DCDC_MASK;
> + reg_ctrl |= vsel;
> +
> + return tps_6507x_write_reg(tps, reg, reg_ctrl);
> +}
> +
> +static int tps6507x_ldo_get_voltage(struct regulator_dev *dev)
> +{
> + unsigned char reg_ctrl;
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int ldo = rdev_get_id(dev);
> + u8 reg, mask;
> + int ret;
> +
> + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
> + return -EINVAL;
> + else {
> + reg = (ldo == TPS6507X_LDO_1 ?
> + TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
> + mask = (ldo == TPS6507X_LDO_1 ?
> + TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
> + TPS6507X_REG_DEFLDO2_LDO2_MASK);
> + }
> +
> + ret = tps_6507x_read_reg(tps, reg, ®_ctrl);
> + if (ret < 0)
> + return ret;
> +
> + reg_ctrl &= mask;
> + return tps->info[ldo]->table[reg_ctrl] * 1000;
> +}
> +
> +static int tps6507x_ldo_set_voltage(struct regulator_dev *dev,
> + int min_uV, int max_uV)
> +{
> + unsigned char reg_ctrl;
> + struct tps_pmic *tps = rdev_get_drvdata(dev);
> + int ldo = rdev_get_id(dev);
> + u8 reg, mask;
> + int vsel, ret;
> +
> + if (ldo < TPS6507X_LDO_1 || ldo > TPS6507X_LDO_2)
> + return -EINVAL;
> + else {
> + reg = (ldo == TPS6507X_LDO_1 ?
> + TPS6507X_REG_LDO_CTRL1 : TPS6507X_REG_DEFLDO2);
> + mask = (ldo == TPS6507X_LDO_1 ?
> + TPS6507X_REG_LDO_CTRL1_LDO1_MASK :
> + TPS6507X_REG_DEFLDO2_LDO2_MASK);
> + }
> +
> + if (min_uV < tps->info[ldo]->min_uV || min_uV > tps->info[ldo]->max_uV)
> + return -EINVAL;
> + 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;
> + }
> +
> + ret = tps_6507x_read_reg(tps, reg, ®_ctrl);
> + if (ret < 0)
> + return ret;
> +
> + reg_ctrl &= ~mask;
> + reg_ctrl |= vsel;
> +
> + return tps_6507x_write_reg(tps, reg, reg_ctrl);
> +}
> +
> +/* Operations permitted on VDCDCx */
> +static struct regulator_ops tps6507x_dcdc_ops = {
> + .is_enabled = tps6507x_dcdc_is_enabled,
> + .enable = tps6507x_dcdc_enable,
> + .disable = tps6507x_dcdc_disable,
> + .get_voltage = tps6507x_dcdc_get_voltage,
> + .set_voltage = tps6507x_dcdc_set_voltage,
> +};
> +
> +/* Operations permitted on LDOx */
> +static struct regulator_ops tps6507x_ldo_ops = {
> + .is_enabled = tps6507x_ldo_is_enabled,
> + .enable = tps6507x_ldo_enable,
> + .disable = tps6507x_ldo_disable,
> + .get_voltage = tps6507x_ldo_get_voltage,
> + .set_voltage = tps6507x_ldo_set_voltage,
> +};
> +
> +static
> +int tps_6507x_probe(struct i2c_client *client, const struct i2c_device_id *id)
> +{
> + static int desc_id;
> + const struct tps_info *info = (void *)id->driver_data;
> + struct regulator_init_data *init_data;
> + struct regulator_dev *rdev;
> + struct tps_pmic *tps;
> + int i;
> +
> + 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;
> +
> + /* common for all regulators */
> + tps->client = client;
> +
> + for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
> + /* Register the regulators */
> + tps->info[i] = info;
> + tps->desc[i].name = info->name;
> + tps->desc[i].id = desc_id++;
> + tps->desc[i].ops = (i > TPS6507X_DCDC_3 ?
> + &tps6507x_ldo_ops : &tps6507x_dcdc_ops);
> + tps->desc[i].type = REGULATOR_VOLTAGE;
> + tps->desc[i].owner = THIS_MODULE;
> +
> + 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);
> + kfree(tps);
> + return PTR_ERR(rdev);
> + }
> +
> + /* Save regulator for cleanup */
> + tps->rdev[i] = rdev;
> + }
> +
> + i2c_set_clientdata(client, tps);
> +
> + return 0;
> +}
> +
> +/**
> + * tps_6507x_remove - TPS6507x driver i2c remove handler
> + * @client: i2c driver client device structure
> + *
> + * Unregister TPS driver as an i2c client device driver
> + */
> +static int __devexit tps_6507x_remove(struct i2c_client *client)
> +{
> + struct tps_pmic *tps = i2c_get_clientdata(client);
> + int i;
> +
> + for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
> + regulator_unregister(tps->rdev[i]);
> +
> + tps->client = NULL;
> +
> + /* clear the client data in i2c */
> + i2c_set_clientdata(client, NULL);
> + kfree(tps);
> +
> + return 0;
> +}
> +
> +/* Supported voltage values for regulators (in milliVolts) */
> +static const u16 VDCDCx_VSEL_table[] = {
> + 725, 750, 775, 800,
> + 825, 850, 875, 900,
> + 925, 950, 975, 1000,
> + 1025, 1050, 1075, 1100,
> + 1125, 1150, 1175, 1200,
> + 1225, 1250, 1275, 1300,
> + 1325, 1350, 1375, 1400,
> + 1425, 1450, 1475, 1500,
> + 1550, 1600, 1650, 1700,
> + 1750, 1800, 1850, 1900,
> + 1950, 2000, 2050, 2100,
> + 2150, 2200, 2250, 2300,
> + 2350, 2400, 2450, 2500,
> + 2550, 2600, 2650, 2700,
> + 2750, 2800, 2850, 2900,
> + 3000, 3100, 3200, 3300,
> +};
> +
> +static const u16 LDO1_VSEL_table[] = {
> + 1000, 1100, 1200, 1250,
> + 1300, 1350, 1400, 1500,
> + 1600, 1800, 2500, 2750,
> + 2800, 3000, 3100, 3300,
> +};
> +
> +static const u16 LDO2_VSEL_table[] = {
> + 725, 750, 775, 800,
> + 825, 850, 875, 900,
> + 925, 950, 975, 1000,
> + 1025, 1050, 1075, 1100,
> + 1125, 1150, 1175, 1200,
> + 1225, 1250, 1275, 1300,
> + 1325, 1350, 1375, 1400,
> + 1425, 1450, 1475, 1500,
> + 1550, 1600, 1650, 1700,
> + 1750, 1800, 1850, 1900,
> + 1950, 2000, 2050, 2100,
> + 2150, 2200, 2250, 2300,
> + 2350, 2400, 2450, 2500,
> + 2550, 2600, 2650, 2700,
> + 2750, 2800, 2850, 2900,
> + 3000, 3100, 3200, 3300,
> +};
> +
> +static const struct tps_info tps6507x_regs[] = {
> + {
> + .name = "VDCDC1",
> + .min_uV = 725000,
> + .max_uV = 3300000,
> + .fixed = 0,
> + .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
> + .table = VDCDCx_VSEL_table,
> + },
> + {
> + .name = "VDCDC2",
> + .min_uV = 725000,
> + .max_uV = 3300000,
> + .fixed = 0,
> + .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
> + .table = VDCDCx_VSEL_table,
> + },
> + {
> + .name = "VDCDC3",
> + .min_uV = 725000,
> + .max_uV = 3300000,
> + .fixed = 0,
> + .table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
> + .table = VDCDCx_VSEL_table,
> + },
> + {
> + .name = "LDO1",
> + .min_uV = 1000000,
> + .max_uV = 3300000,
> + .fixed = 0,
> + .table_len = ARRAY_SIZE(LDO1_VSEL_table),
> + .table = LDO1_VSEL_table,
> + },
> + {
> + .name = "LDO2",
> + .min_uV = 725000,
> + .max_uV = 3300000,
> + .fixed = 0,
> + .table_len = ARRAY_SIZE(LDO2_VSEL_table),
> + .table = LDO2_VSEL_table,
> + },
> +};
> +
> +static const struct i2c_device_id tps_6507x_id = {
> + .name = "tps6507x",
> + .driver_data = (unsigned long) &tps6507x_regs[0],
> +};
> +MODULE_DEVICE_TABLE(i2c, tps_6507x_id);
> +
> +static struct i2c_driver tps_6507x_i2c_driver = {
> + .driver = {
> + .name = "tps_6507x_pwr",
> + .owner = THIS_MODULE,
> + },
> + .probe = tps_6507x_probe,
> + .remove = __devexit_p(tps_6507x_remove),
> + .id_table = &tps_6507x_id,
> +};
> +
> +/**
> + * tps_6507x_init
> + *
> + * Module init function
> + */
> +static int __init tps_6507x_init(void)
> +{
> + return i2c_add_driver(&tps_6507x_i2c_driver);
> +}
> +subsys_initcall(tps_6507x_init);
> +
> +/**
> + * tps_6507x_cleanup
> + *
> + * Module exit function
> + */
> +static void __exit tps_6507x_cleanup(void)
> +{
> + i2c_del_driver(&tps_6507x_i2c_driver);
> +}
> +module_exit(tps_6507x_cleanup);
> +
> +MODULE_AUTHOR("Texas Instruments");
> +MODULE_DESCRIPTION("TPS6507x voltage regulator driver");
> +MODULE_LICENSE("GPLv2");
> --
> 1.6.2.4
>
> --
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balbi
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