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    Subject[PATCH v3] regulator: Add TPS65090 regulator driver
    Date
    Add TPS65090 regulator driver

    TPS65090 PMIC from TI consists of 3 step down converters,
    2 always on LDOs and 7 current limited load switches. The
    output voltages are ON/OFF controllable and are meant to
    supply power to the components on target board.

    Signed-off-by: Venu Byravarasu <vbyravarasu@nvidia.com>
    ---
    Fixed compilation error in previous patch, by adding fifth
    parameter to regulator_register().

    drivers/regulator/Kconfig | 7 +
    drivers/regulator/Makefile | 1 +
    drivers/regulator/tps65090-regulator.c | 197 ++++++++++++++++++++++++++
    include/linux/regulator/tps65090-regulator.h | 50 +++++++
    4 files changed, 255 insertions(+), 0 deletions(-)
    create mode 100644 drivers/regulator/tps65090-regulator.c
    create mode 100644 include/linux/regulator/tps65090-regulator.h

    diff --git a/drivers/regulator/Kconfig b/drivers/regulator/Kconfig
    index 36db5a4..ed37125 100644
    --- a/drivers/regulator/Kconfig
    +++ b/drivers/regulator/Kconfig
    @@ -294,6 +294,13 @@ config REGULATOR_TPS6507X
    three step-down converters and two general-purpose LDO voltage regulators.
    It supports TI's software based Class-2 SmartReflex implementation.

    +config REGULATOR_TPS65090
    + tristate "TI TPS65090 Power regulator"
    + depends on MFD_TPS65090
    + help
    + This driver provides support for the voltage regulators on the
    + TI TPS65090 PMIC.
    +
    config REGULATOR_TPS65217
    tristate "TI TPS65217 Power regulators"
    depends on MFD_TPS65217
    diff --git a/drivers/regulator/Makefile b/drivers/regulator/Makefile
    index 94b5274..2cc91d1 100644
    --- a/drivers/regulator/Makefile
    +++ b/drivers/regulator/Makefile
    @@ -40,6 +40,7 @@ obj-$(CONFIG_REGULATOR_TPS6105X) += tps6105x-regulator.o
    obj-$(CONFIG_REGULATOR_TPS62360) += tps62360-regulator.o
    obj-$(CONFIG_REGULATOR_TPS65023) += tps65023-regulator.o
    obj-$(CONFIG_REGULATOR_TPS6507X) += tps6507x-regulator.o
    +obj-$(CONFIG_REGULATOR_TPS65090) += tps65090-regulator.o
    obj-$(CONFIG_REGULATOR_TPS65217) += tps65217-regulator.o
    obj-$(CONFIG_REGULATOR_TPS6524X) += tps6524x-regulator.o
    obj-$(CONFIG_REGULATOR_TPS6586X) += tps6586x-regulator.o
    diff --git a/drivers/regulator/tps65090-regulator.c b/drivers/regulator/tps65090-regulator.c
    new file mode 100644
    index 0000000..6c28e3a
    --- /dev/null
    +++ b/drivers/regulator/tps65090-regulator.c
    @@ -0,0 +1,197 @@
    +/*
    + * Regulator driver for tps65090 power management chip.
    + *
    + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
    +
    + * This program is free software; you can redistribute it and/or modify it
    + * under the terms and conditions of the GNU General Public License,
    + * version 2, as published by the Free Software Foundation.
    +
    + * This program is distributed in the hope it will be useful, but WITHOUT
    + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    + * more details.
    +
    + * You should have received a copy of the GNU General Public License
    + * along with this program. If not, see <http://www.gnu.org/licenses/>
    + */
    +
    +#include <linux/module.h>
    +#include <linux/delay.h>
    +#include <linux/init.h>
    +#include <linux/slab.h>
    +#include <linux/err.h>
    +#include <linux/platform_device.h>
    +#include <linux/regulator/driver.h>
    +#include <linux/regulator/machine.h>
    +#include <linux/mfd/tps65090.h>
    +#include <linux/regulator/tps65090-regulator.h>
    +
    +struct tps65090_regulator {
    + int id;
    + /* Regulator register address.*/
    + u8 reg_en_reg;
    + u8 en_bit;
    +
    + /* used by regulator core */
    + struct regulator_desc desc;
    +
    + /* Device */
    + struct device *dev;
    +};
    +
    +static inline struct device *to_tps65090_dev(struct regulator_dev *rdev)
    +{
    + return rdev_get_dev(rdev)->parent->parent;
    +}
    +
    +static int tps65090_reg_is_enabled(struct regulator_dev *rdev)
    +{
    + struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
    + struct device *parent = to_tps65090_dev(rdev);
    + uint8_t control;
    + int ret;
    +
    + ret = tps65090_read(parent, ri->reg_en_reg, &control);
    + if (ret < 0) {
    + dev_err(&rdev->dev, "Error in reading reg 0x%x\n",
    + ri->reg_en_reg);
    + return ret;
    + }
    + return (((control >> ri->en_bit) & 1) == 1);
    +}
    +
    +static int tps65090_reg_enable(struct regulator_dev *rdev)
    +{
    + struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
    + struct device *parent = to_tps65090_dev(rdev);
    + int ret;
    +
    + ret = tps65090_set_bits(parent, ri->reg_en_reg, ri->en_bit);
    + if (ret < 0)
    + dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
    + ri->reg_en_reg);
    + return ret;
    +}
    +
    +static int tps65090_reg_disable(struct regulator_dev *rdev)
    +{
    + struct tps65090_regulator *ri = rdev_get_drvdata(rdev);
    + struct device *parent = to_tps65090_dev(rdev);
    + int ret;
    +
    + ret = tps65090_clr_bits(parent, ri->reg_en_reg, ri->en_bit);
    + if (ret < 0)
    + dev_err(&rdev->dev, "Error in updating reg 0x%x\n",
    + ri->reg_en_reg);
    +
    + return ret;
    +}
    +
    +static struct regulator_ops tps65090_ops = {
    + .enable = tps65090_reg_enable,
    + .disable = tps65090_reg_disable,
    + .is_enabled = tps65090_reg_is_enabled,
    +};
    +
    +#define tps65090_REG(_id, _en_reg, _en_bit, _ops) \
    +{ \
    + .reg_en_reg = _en_reg, \
    + .en_bit = _en_bit, \
    + .id = TPS65090_ID_##_id, \
    + .desc = { \
    + .name = tps65090_rails(_id), \
    + .id = TPS65090_ID_##_id, \
    + .ops = &_ops, \
    + .type = REGULATOR_VOLTAGE, \
    + .owner = THIS_MODULE, \
    + }, \
    +}
    +
    +static struct tps65090_regulator TPS65090_regulator[] = {
    + tps65090_REG(DCDC1, 12, 0, tps65090_ops),
    + tps65090_REG(DCDC2, 13, 0, tps65090_ops),
    + tps65090_REG(DCDC3, 14, 0, tps65090_ops),
    + tps65090_REG(FET1, 15, 0, tps65090_ops),
    + tps65090_REG(FET2, 16, 0, tps65090_ops),
    + tps65090_REG(FET3, 17, 0, tps65090_ops),
    + tps65090_REG(FET4, 18, 0, tps65090_ops),
    + tps65090_REG(FET5, 19, 0, tps65090_ops),
    + tps65090_REG(FET6, 20, 0, tps65090_ops),
    + tps65090_REG(FET7, 21, 0, tps65090_ops),
    +};
    +
    +static inline struct tps65090_regulator *find_regulator_info(int id)
    +{
    + struct tps65090_regulator *ri;
    + int i;
    +
    + for (i = 0; i < ARRAY_SIZE(TPS65090_regulator); i++) {
    + ri = &TPS65090_regulator[i];
    + if (ri->desc.id == id)
    + return ri;
    + }
    + return NULL;
    +}
    +
    +static int __devinit tps65090_regulator_probe(struct platform_device *pdev)
    +{
    + struct tps65090_regulator *ri = NULL;
    + struct regulator_dev *rdev;
    + struct tps65090_regulator_platform_data *tps_pdata;
    + int id = pdev->id;
    +
    + dev_dbg(&pdev->dev, "Probing regulator %d\n", id);
    +
    + ri = find_regulator_info(id);
    + if (ri == NULL) {
    + dev_err(&pdev->dev, "invalid regulator ID specified\n");
    + return -EINVAL;
    + }
    + tps_pdata = pdev->dev.platform_data;
    + ri->dev = &pdev->dev;
    +
    + rdev = regulator_register(&ri->desc, &pdev->dev,
    + &tps_pdata->regulator, ri, NULL);
    + if (IS_ERR_OR_NULL(rdev)) {
    + dev_err(&pdev->dev, "failed to register regulator %s\n",
    + ri->desc.name);
    + return PTR_ERR(rdev);
    + }
    +
    + platform_set_drvdata(pdev, rdev);
    + return 0;
    +}
    +
    +static int __devexit tps65090_regulator_remove(struct platform_device *pdev)
    +{
    + struct regulator_dev *rdev = platform_get_drvdata(pdev);
    +
    + regulator_unregister(rdev);
    + return 0;
    +}
    +
    +static struct platform_driver tps65090_regulator_driver = {
    + .driver = {
    + .name = "tps65090-regulator",
    + .owner = THIS_MODULE,
    + },
    + .probe = tps65090_regulator_probe,
    + .remove = __devexit_p(tps65090_regulator_remove),
    +};
    +
    +static int __init tps65090_regulator_init(void)
    +{
    + return platform_driver_register(&tps65090_regulator_driver);
    +}
    +subsys_initcall(tps65090_regulator_init);
    +
    +static void __exit tps65090_regulator_exit(void)
    +{
    + platform_driver_unregister(&tps65090_regulator_driver);
    +}
    +module_exit(tps65090_regulator_exit);
    +
    +MODULE_DESCRIPTION("tps65090 regulator driver");
    +MODULE_AUTHOR("Venu Byravarasu <vbyravarasu@nvidia.com>");
    +MODULE_LICENSE("GPL v2");
    diff --git a/include/linux/regulator/tps65090-regulator.h b/include/linux/regulator/tps65090-regulator.h
    new file mode 100644
    index 0000000..0fa04b6
    --- /dev/null
    +++ b/include/linux/regulator/tps65090-regulator.h
    @@ -0,0 +1,50 @@
    +/*
    + * Regulator driver interface for TI TPS65090 PMIC family
    + *
    + * Copyright (c) 2012, NVIDIA CORPORATION. All rights reserved.
    +
    + * This program is free software; you can redistribute it and/or modify it
    + * under the terms and conditions of the GNU General Public License,
    + * version 2, as published by the Free Software Foundation.
    +
    + * This program is distributed in the hope it will be useful, but WITHOUT
    + * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
    + * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
    + * more details.
    +
    + * You should have received a copy of the GNU General Public License
    + * along with this program. If not, see <http://www.gnu.org/licenses/>.
    + */
    +
    +#ifndef __REGULATOR_TPS65090_H
    +#define __REGULATOR_TPS65090_H
    +
    +#include <linux/regulator/machine.h>
    +
    +#define tps65090_rails(_name) "tps65090_"#_name
    +
    +enum {
    + TPS65090_ID_DCDC1,
    + TPS65090_ID_DCDC2,
    + TPS65090_ID_DCDC3,
    + TPS65090_ID_FET1,
    + TPS65090_ID_FET2,
    + TPS65090_ID_FET3,
    + TPS65090_ID_FET4,
    + TPS65090_ID_FET5,
    + TPS65090_ID_FET6,
    + TPS65090_ID_FET7,
    +};
    +
    +/*
    + * struct tps65090_regulator_platform_data
    + *
    + * @regulator: The regulator init data.
    + * @slew_rate_uV_per_us: Slew rate microvolt per microsec.
    + */
    +
    +struct tps65090_regulator_platform_data {
    + struct regulator_init_data regulator;
    +};
    +
    +#endif /* __REGULATOR_TPS65090_H */
    --
    1.7.1.1


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