Commit 31dd6a26 authored by Todd Fischer's avatar Todd Fischer Committed by Samuel Ortiz

mfd: Add TPS6507x support

TPS6507x are multi function (PM, touchscreen) chipsets from TI.
This commit also changes the corresponding regulator driver from being
standalone to an MFD subdevice.
Signed-off-by: default avatarTodd Fischer <todd.fischer@ridgerun.com>
Acked-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: default avatarLiam Girdwood <lrg@slimlogic.co.uk>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 4ce5ba5b
......@@ -116,6 +116,18 @@ config TPS65010
This driver can also be built as a module. If so, the module
will be called tps65010.
config TPS6507X
tristate "TPS6507x Power Management / Touch Screen chips"
select MFD_CORE
depends on I2C
help
If you say yes here you get support for the TPS6507x series of
Power Management / Touch Screen chips. These include voltage
regulators, lithium ion/polymer battery charging, touch screen
and other features that are often used in portable devices.
This driver can also be built as a module. If so, the module
will be called tps6507x.
config MENELAUS
bool "Texas Instruments TWL92330/Menelaus PM chip"
depends on I2C=y && ARCH_OMAP2
......
......@@ -29,6 +29,7 @@ obj-$(CONFIG_MFD_WM8350_I2C) += wm8350-i2c.o
obj-$(CONFIG_MFD_WM8994) += wm8994-core.o wm8994-irq.o
obj-$(CONFIG_TPS65010) += tps65010.o
obj-$(CONFIG_TPS6507X) += tps6507x.o
obj-$(CONFIG_MENELAUS) += menelaus.o
obj-$(CONFIG_TWL4030_CORE) += twl-core.o twl4030-irq.o twl6030-irq.o
......
/*
* tps6507x.c -- TPS6507x chip family multi-function driver
*
* Copyright (c) 2010 RidgeRun (todd.fischer@ridgerun.com)
*
* Author: Todd Fischer
* todd.fischer@ridgerun.com
*
* Credits:
*
* Using code from wm831x-*.c, wm8400-core, Wolfson Microelectronics PLC.
*
* For licencing details see kernel-base/COPYING
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/mfd/core.h>
#include <linux/mfd/tps6507x.h>
static struct mfd_cell tps6507x_devs[] = {
{
.name = "tps6507x-pmic",
},
};
static int tps6507x_i2c_read_device(struct tps6507x_dev *tps6507x, char reg,
int bytes, void *dest)
{
struct i2c_client *i2c = tps6507x->i2c_client;
struct i2c_msg xfer[2];
int ret;
/* Write register */
xfer[0].addr = i2c->addr;
xfer[0].flags = 0;
xfer[0].len = 1;
xfer[0].buf = &reg;
/* Read data */
xfer[1].addr = i2c->addr;
xfer[1].flags = I2C_M_RD;
xfer[1].len = bytes;
xfer[1].buf = dest;
ret = i2c_transfer(i2c->adapter, xfer, 2);
if (ret == 2)
ret = 0;
else if (ret >= 0)
ret = -EIO;
return ret;
}
static int tps6507x_i2c_write_device(struct tps6507x_dev *tps6507x, char reg,
int bytes, void *src)
{
struct i2c_client *i2c = tps6507x->i2c_client;
/* we add 1 byte for device register */
u8 msg[TPS6507X_MAX_REGISTER + 1];
int ret;
if (bytes > (TPS6507X_MAX_REGISTER + 1))
return -EINVAL;
msg[0] = reg;
memcpy(&msg[1], src, bytes);
ret = i2c_master_send(i2c, msg, bytes + 1);
if (ret < 0)
return ret;
if (ret != bytes + 1)
return -EIO;
return 0;
}
static int tps6507x_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct tps6507x_dev *tps6507x;
int ret = 0;
tps6507x = kzalloc(sizeof(struct tps6507x_dev), GFP_KERNEL);
if (tps6507x == NULL) {
kfree(i2c);
return -ENOMEM;
}
i2c_set_clientdata(i2c, tps6507x);
tps6507x->dev = &i2c->dev;
tps6507x->i2c_client = i2c;
tps6507x->read_dev = tps6507x_i2c_read_device;
tps6507x->write_dev = tps6507x_i2c_write_device;
ret = mfd_add_devices(tps6507x->dev, -1,
tps6507x_devs, ARRAY_SIZE(tps6507x_devs),
NULL, 0);
if (ret < 0)
goto err;
return ret;
err:
mfd_remove_devices(tps6507x->dev);
kfree(tps6507x);
return ret;
}
static int tps6507x_i2c_remove(struct i2c_client *i2c)
{
struct tps6507x_dev *tps6507x = i2c_get_clientdata(i2c);
mfd_remove_devices(tps6507x->dev);
kfree(tps6507x);
return 0;
}
static const struct i2c_device_id tps6507x_i2c_id[] = {
{ "tps6507x", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, tps6507x_i2c_id);
static struct i2c_driver tps6507x_i2c_driver = {
.driver = {
.name = "tps6507x",
.owner = THIS_MODULE,
},
.probe = tps6507x_i2c_probe,
.remove = tps6507x_i2c_remove,
.id_table = tps6507x_i2c_id,
};
static int __init tps6507x_i2c_init(void)
{
return i2c_add_driver(&tps6507x_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(tps6507x_i2c_init);
static void __exit tps6507x_i2c_exit(void)
{
i2c_del_driver(&tps6507x_i2c_driver);
}
module_exit(tps6507x_i2c_exit);
MODULE_DESCRIPTION("TPS6507x chip family multi-function driver");
MODULE_LICENSE("GPL");
......@@ -22,7 +22,6 @@
#include <linux/platform_device.h>
#include <linux/regulator/driver.h>
#include <linux/regulator/machine.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/slab.h>
#include <linux/mfd/tps6507x.h>
......@@ -104,22 +103,67 @@ struct tps_info {
const u16 *table;
};
static const struct tps_info tps6507x_pmic_regs[] = {
{
.name = "VDCDC1",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "VDCDC2",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "VDCDC3",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "LDO1",
.min_uV = 1000000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(LDO1_VSEL_table),
.table = LDO1_VSEL_table,
},
{
.name = "LDO2",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(LDO2_VSEL_table),
.table = LDO2_VSEL_table,
},
};
struct tps6507x_pmic {
struct regulator_desc desc[TPS6507X_NUM_REGULATOR];
struct i2c_client *client;
struct tps6507x_dev *mfd;
struct regulator_dev *rdev[TPS6507X_NUM_REGULATOR];
const struct tps_info *info[TPS6507X_NUM_REGULATOR];
struct mutex io_lock;
};
static inline int tps6507x_pmic_read(struct tps6507x_pmic *tps, u8 reg)
{
return i2c_smbus_read_byte_data(tps->client, reg);
u8 val;
int err;
err = tps->mfd->read_dev(tps->mfd, reg, 1, &val);
if (err)
return err;
return val;
}
static inline int tps6507x_pmic_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
{
return i2c_smbus_write_byte_data(tps->client, reg, val);
return tps->mfd->write_dev(tps->mfd, reg, 1, &val);
}
static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
......@@ -130,7 +174,7 @@ static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
data = tps6507x_pmic_read(tps, reg);
if (data < 0) {
dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
err = data;
goto out;
}
......@@ -138,7 +182,7 @@ static int tps6507x_pmic_set_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
data |= mask;
err = tps6507x_pmic_write(tps, reg, data);
if (err)
dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
out:
mutex_unlock(&tps->io_lock);
......@@ -153,7 +197,7 @@ static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
data = tps6507x_pmic_read(tps, reg);
if (data < 0) {
dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
err = data;
goto out;
}
......@@ -161,7 +205,7 @@ static int tps6507x_pmic_clear_bits(struct tps6507x_pmic *tps, u8 reg, u8 mask)
data &= ~mask;
err = tps6507x_pmic_write(tps, reg, data);
if (err)
dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
out:
mutex_unlock(&tps->io_lock);
......@@ -176,7 +220,7 @@ static int tps6507x_pmic_reg_read(struct tps6507x_pmic *tps, u8 reg)
data = tps6507x_pmic_read(tps, reg);
if (data < 0)
dev_err(&tps->client->dev, "Read from reg 0x%x failed\n", reg);
dev_err(tps->mfd->dev, "Read from reg 0x%x failed\n", reg);
mutex_unlock(&tps->io_lock);
return data;
......@@ -190,7 +234,7 @@ static int tps6507x_pmic_reg_write(struct tps6507x_pmic *tps, u8 reg, u8 val)
err = tps6507x_pmic_write(tps, reg, val);
if (err < 0)
dev_err(&tps->client->dev, "Write for reg 0x%x failed\n", reg);
dev_err(tps->mfd->dev, "Write for reg 0x%x failed\n", reg);
mutex_unlock(&tps->io_lock);
return err;
......@@ -483,11 +527,12 @@ static struct regulator_ops tps6507x_pmic_ldo_ops = {
.list_voltage = tps6507x_pmic_ldo_list_voltage,
};
static int __devinit tps6507x_pmic_probe(struct i2c_client *client,
const struct i2c_device_id *id)
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;
const struct tps_info *info = (void *)id->driver_data;
const struct tps_info *info = &tps6507x_pmic_regs[0];
struct regulator_init_data *init_data;
struct regulator_dev *rdev;
struct tps6507x_pmic *tps;
......@@ -495,16 +540,12 @@ static int __devinit tps6507x_pmic_probe(struct i2c_client *client,
int i;
int error;
if (!i2c_check_functionality(client->adapter,
I2C_FUNC_SMBUS_BYTE_DATA))
return -EIO;
/**
* tps_board points to pmic related constants
* coming from the board-evm file.
*/
tps_board = dev_get_platdata(&client->dev);
tps_board = dev_get_platdata(tps6507x_dev->dev);
if (!tps_board)
return -EINVAL;
......@@ -523,7 +564,7 @@ static int __devinit tps6507x_pmic_probe(struct i2c_client *client,
mutex_init(&tps->io_lock);
/* common for all regulators */
tps->client = client;
tps->mfd = tps6507x_dev;
for (i = 0; i < TPS6507X_NUM_REGULATOR; i++, info++, init_data++) {
/* Register the regulators */
......@@ -537,10 +578,11 @@ static int __devinit tps6507x_pmic_probe(struct i2c_client *client,
tps->desc[i].owner = THIS_MODULE;
rdev = regulator_register(&tps->desc[i],
&client->dev, init_data, tps);
tps6507x_dev->dev, init_data, tps);
if (IS_ERR(rdev)) {
dev_err(&client->dev, "failed to register %s\n",
id->name);
dev_err(tps6507x_dev->dev,
"failed to register %s regulator\n",
pdev->name);
error = PTR_ERR(rdev);
goto fail;
}
......@@ -549,7 +591,7 @@ static int __devinit tps6507x_pmic_probe(struct i2c_client *client,
tps->rdev[i] = rdev;
}
i2c_set_clientdata(client, tps);
tps6507x_dev->pmic = tps;
return 0;
......@@ -567,14 +609,12 @@ static int __devinit tps6507x_pmic_probe(struct i2c_client *client,
*
* Unregister TPS driver as an i2c client device driver
*/
static int __devexit tps6507x_pmic_remove(struct i2c_client *client)
static int __devexit tps6507x_pmic_remove(struct platform_device *pdev)
{
struct tps6507x_pmic *tps = i2c_get_clientdata(client);
struct tps6507x_dev *tps6507x_dev = platform_get_drvdata(pdev);
struct tps6507x_pmic *tps = tps6507x_dev->pmic;
int i;
/* clear the client data in i2c */
i2c_set_clientdata(client, NULL);
for (i = 0; i < TPS6507X_NUM_REGULATOR; i++)
regulator_unregister(tps->rdev[i]);
......@@ -583,59 +623,13 @@ static int __devexit tps6507x_pmic_remove(struct i2c_client *client)
return 0;
}
static const struct tps_info tps6507x_pmic_regs[] = {
{
.name = "VDCDC1",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "VDCDC2",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "VDCDC3",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(VDCDCx_VSEL_table),
.table = VDCDCx_VSEL_table,
},
{
.name = "LDO1",
.min_uV = 1000000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(LDO1_VSEL_table),
.table = LDO1_VSEL_table,
},
{
.name = "LDO2",
.min_uV = 725000,
.max_uV = 3300000,
.table_len = ARRAY_SIZE(LDO2_VSEL_table),
.table = LDO2_VSEL_table,
},
};
static const struct i2c_device_id tps6507x_pmic_id[] = {
{.name = "tps6507x",
.driver_data = (unsigned long) tps6507x_pmic_regs,},
{ },
};
MODULE_DEVICE_TABLE(i2c, tps6507x_pmic_id);
static struct i2c_driver tps6507x_i2c_driver = {
static struct platform_driver tps6507x_pmic_driver = {
.driver = {
.name = "tps6507x",
.name = "tps6507x-pmic",
.owner = THIS_MODULE,
},
.probe = tps6507x_pmic_probe,
.remove = __devexit_p(tps6507x_pmic_remove),
.id_table = tps6507x_pmic_id,
};
/**
......@@ -645,7 +639,7 @@ static struct i2c_driver tps6507x_i2c_driver = {
*/
static int __init tps6507x_pmic_init(void)
{
return i2c_add_driver(&tps6507x_i2c_driver);
return platform_driver_register(&tps6507x_pmic_driver);
}
subsys_initcall(tps6507x_pmic_init);
......@@ -656,10 +650,11 @@ subsys_initcall(tps6507x_pmic_init);
*/
static void __exit tps6507x_pmic_cleanup(void)
{
i2c_del_driver(&tps6507x_i2c_driver);
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");
......@@ -131,6 +131,8 @@
/* VDCDC MASK */
#define TPS6507X_DEFDCDCX_DCDC_MASK 0X3F
#define TPS6507X_MAX_REGISTER 0X19
/**
* struct tps6507x_board - packages regulator and touchscreen init data
* @tps6507x_regulator_data: regulator initialization values
......@@ -142,4 +144,24 @@ struct tps6507x_board {
struct regulator_init_data *tps6507x_pmic_init_data;
};
/**
* struct tps6507x_dev - tps6507x sub-driver chip access routines
* @read_dev() - I2C register read function
* @write_dev() - I2C register write function
*
* Device data may be used to access the TPS6507x chip
*/
struct tps6507x_dev {
struct device *dev;
struct i2c_client *i2c_client;
int (*read_dev)(struct tps6507x_dev *tps6507x, char reg, int size,
void *dest);
int (*write_dev)(struct tps6507x_dev *tps6507x, char reg, int size,
void *src);
/* Client devices */
struct tps6507x_pmic *pmic;
};
#endif /* __LINUX_MFD_TPS6507X_H */
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