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alistair23-linux/drivers/mfd/max8997.c
Mark Brown 0848c94fb4 mfd: core: Push irqdomain mapping out into devices 
Currently the MFD core supports remapping MFD cell interrupts using an
irqdomain but only if the MFD is being instantiated using device tree
and only if the device tree bindings use the pattern of registering IPs
in the device tree with compatible properties.  This will be actively
harmful for drivers which support non-DT platforms and use this pattern
for their DT bindings as it will mean that the core will silently change
remapping behaviour and it is also limiting for drivers which don't do
DT with this particular pattern.  There is also a potential fragility if
there are interrupts not associated with MFD cells and all the cells are
omitted from the device tree for some reason.

Instead change the code to take an IRQ domain as an optional argument,
allowing drivers to take the decision about the parent domain for their
interrupts.  The one current user of this feature is ab8500-core, it has
the domain lookup pushed out into the driver.

Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
2012-09-15 23:22:04 +02:00

459 lines
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/*
* max8997.c - mfd core driver for the Maxim 8966 and 8997
*
* Copyright (C) 2011 Samsung Electronics
* MyungJoo Ham <myungjoo.ham@smasung.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; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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, write to the Free Software
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*
* This driver is based on max8998.c
*/
#include <linux/slab.h>
#include <linux/i2c.h>
#include <linux/interrupt.h>
#include <linux/pm_runtime.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/mfd/core.h>
#include <linux/mfd/max8997.h>
#include <linux/mfd/max8997-private.h>
#define I2C_ADDR_PMIC (0xCC >> 1)
#define I2C_ADDR_MUIC (0x4A >> 1)
#define I2C_ADDR_BATTERY (0x6C >> 1)
#define I2C_ADDR_RTC (0x0C >> 1)
#define I2C_ADDR_HAPTIC (0x90 >> 1)
static struct mfd_cell max8997_devs[] = {
{ .name = "max8997-pmic", },
{ .name = "max8997-rtc", },
{ .name = "max8997-battery", },
{ .name = "max8997-haptic", },
{ .name = "max8997-muic", },
{ .name = "max8997-led", .id = 1 },
{ .name = "max8997-led", .id = 2 },
};
int max8997_read_reg(struct i2c_client *i2c, u8 reg, u8 *dest)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_read_byte_data(i2c, reg);
mutex_unlock(&max8997->iolock);
if (ret < 0)
return ret;
ret &= 0xff;
*dest = ret;
return 0;
}
EXPORT_SYMBOL_GPL(max8997_read_reg);
int max8997_bulk_read(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_read_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&max8997->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL_GPL(max8997_bulk_read);
int max8997_write_reg(struct i2c_client *i2c, u8 reg, u8 value)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_write_byte_data(i2c, reg, value);
mutex_unlock(&max8997->iolock);
return ret;
}
EXPORT_SYMBOL_GPL(max8997_write_reg);
int max8997_bulk_write(struct i2c_client *i2c, u8 reg, int count, u8 *buf)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_write_i2c_block_data(i2c, reg, count, buf);
mutex_unlock(&max8997->iolock);
if (ret < 0)
return ret;
return 0;
}
EXPORT_SYMBOL_GPL(max8997_bulk_write);
int max8997_update_reg(struct i2c_client *i2c, u8 reg, u8 val, u8 mask)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int ret;
mutex_lock(&max8997->iolock);
ret = i2c_smbus_read_byte_data(i2c, reg);
if (ret >= 0) {
u8 old_val = ret & 0xff;
u8 new_val = (val & mask) | (old_val & (~mask));
ret = i2c_smbus_write_byte_data(i2c, reg, new_val);
}
mutex_unlock(&max8997->iolock);
return ret;
}
EXPORT_SYMBOL_GPL(max8997_update_reg);
static int max8997_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct max8997_dev *max8997;
struct max8997_platform_data *pdata = i2c->dev.platform_data;
int ret = 0;
max8997 = kzalloc(sizeof(struct max8997_dev), GFP_KERNEL);
if (max8997 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, max8997);
max8997->dev = &i2c->dev;
max8997->i2c = i2c;
max8997->type = id->driver_data;
max8997->irq = i2c->irq;
if (!pdata)
goto err;
max8997->ono = pdata->ono;
mutex_init(&max8997->iolock);
max8997->rtc = i2c_new_dummy(i2c->adapter, I2C_ADDR_RTC);
i2c_set_clientdata(max8997->rtc, max8997);
max8997->haptic = i2c_new_dummy(i2c->adapter, I2C_ADDR_HAPTIC);
i2c_set_clientdata(max8997->haptic, max8997);
max8997->muic = i2c_new_dummy(i2c->adapter, I2C_ADDR_MUIC);
i2c_set_clientdata(max8997->muic, max8997);
pm_runtime_set_active(max8997->dev);
max8997_irq_init(max8997);
mfd_add_devices(max8997->dev, -1, max8997_devs,
ARRAY_SIZE(max8997_devs),
NULL, 0, NULL);
/*
* TODO: enable others (flash, muic, rtc, battery, ...) and
* check the return value
*/
if (ret < 0)
goto err_mfd;
/* MAX8997 has a power button input. */
device_init_wakeup(max8997->dev, pdata->wakeup);
return ret;
err_mfd:
mfd_remove_devices(max8997->dev);
i2c_unregister_device(max8997->muic);
i2c_unregister_device(max8997->haptic);
i2c_unregister_device(max8997->rtc);
err:
kfree(max8997);
return ret;
}
static int max8997_i2c_remove(struct i2c_client *i2c)
{
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
mfd_remove_devices(max8997->dev);
i2c_unregister_device(max8997->muic);
i2c_unregister_device(max8997->haptic);
i2c_unregister_device(max8997->rtc);
kfree(max8997);
return 0;
}
static const struct i2c_device_id max8997_i2c_id[] = {
{ "max8997", TYPE_MAX8997 },
{ "max8966", TYPE_MAX8966 },
{ }
};
MODULE_DEVICE_TABLE(i2c, max8998_i2c_id);
static u8 max8997_dumpaddr_pmic[] = {
MAX8997_REG_INT1MSK,
MAX8997_REG_INT2MSK,
MAX8997_REG_INT3MSK,
MAX8997_REG_INT4MSK,
MAX8997_REG_MAINCON1,
MAX8997_REG_MAINCON2,
MAX8997_REG_BUCKRAMP,
MAX8997_REG_BUCK1CTRL,
MAX8997_REG_BUCK1DVS1,
MAX8997_REG_BUCK1DVS2,
MAX8997_REG_BUCK1DVS3,
MAX8997_REG_BUCK1DVS4,
MAX8997_REG_BUCK1DVS5,
MAX8997_REG_BUCK1DVS6,
MAX8997_REG_BUCK1DVS7,
MAX8997_REG_BUCK1DVS8,
MAX8997_REG_BUCK2CTRL,
MAX8997_REG_BUCK2DVS1,
MAX8997_REG_BUCK2DVS2,
MAX8997_REG_BUCK2DVS3,
MAX8997_REG_BUCK2DVS4,
MAX8997_REG_BUCK2DVS5,
MAX8997_REG_BUCK2DVS6,
MAX8997_REG_BUCK2DVS7,
MAX8997_REG_BUCK2DVS8,
MAX8997_REG_BUCK3CTRL,
MAX8997_REG_BUCK3DVS,
MAX8997_REG_BUCK4CTRL,
MAX8997_REG_BUCK4DVS,
MAX8997_REG_BUCK5CTRL,
MAX8997_REG_BUCK5DVS1,
MAX8997_REG_BUCK5DVS2,
MAX8997_REG_BUCK5DVS3,
MAX8997_REG_BUCK5DVS4,
MAX8997_REG_BUCK5DVS5,
MAX8997_REG_BUCK5DVS6,
MAX8997_REG_BUCK5DVS7,
MAX8997_REG_BUCK5DVS8,
MAX8997_REG_BUCK6CTRL,
MAX8997_REG_BUCK6BPSKIPCTRL,
MAX8997_REG_BUCK7CTRL,
MAX8997_REG_BUCK7DVS,
MAX8997_REG_LDO1CTRL,
MAX8997_REG_LDO2CTRL,
MAX8997_REG_LDO3CTRL,
MAX8997_REG_LDO4CTRL,
MAX8997_REG_LDO5CTRL,
MAX8997_REG_LDO6CTRL,
MAX8997_REG_LDO7CTRL,
MAX8997_REG_LDO8CTRL,
MAX8997_REG_LDO9CTRL,
MAX8997_REG_LDO10CTRL,
MAX8997_REG_LDO11CTRL,
MAX8997_REG_LDO12CTRL,
MAX8997_REG_LDO13CTRL,
MAX8997_REG_LDO14CTRL,
MAX8997_REG_LDO15CTRL,
MAX8997_REG_LDO16CTRL,
MAX8997_REG_LDO17CTRL,
MAX8997_REG_LDO18CTRL,
MAX8997_REG_LDO21CTRL,
MAX8997_REG_MBCCTRL1,
MAX8997_REG_MBCCTRL2,
MAX8997_REG_MBCCTRL3,
MAX8997_REG_MBCCTRL4,
MAX8997_REG_MBCCTRL5,
MAX8997_REG_MBCCTRL6,
MAX8997_REG_OTPCGHCVS,
MAX8997_REG_SAFEOUTCTRL,
MAX8997_REG_LBCNFG1,
MAX8997_REG_LBCNFG2,
MAX8997_REG_BBCCTRL,
MAX8997_REG_FLASH1_CUR,
MAX8997_REG_FLASH2_CUR,
MAX8997_REG_MOVIE_CUR,
MAX8997_REG_GSMB_CUR,
MAX8997_REG_BOOST_CNTL,
MAX8997_REG_LEN_CNTL,
MAX8997_REG_FLASH_CNTL,
MAX8997_REG_WDT_CNTL,
MAX8997_REG_MAXFLASH1,
MAX8997_REG_MAXFLASH2,
MAX8997_REG_FLASHSTATUSMASK,
MAX8997_REG_GPIOCNTL1,
MAX8997_REG_GPIOCNTL2,
MAX8997_REG_GPIOCNTL3,
MAX8997_REG_GPIOCNTL4,
MAX8997_REG_GPIOCNTL5,
MAX8997_REG_GPIOCNTL6,
MAX8997_REG_GPIOCNTL7,
MAX8997_REG_GPIOCNTL8,
MAX8997_REG_GPIOCNTL9,
MAX8997_REG_GPIOCNTL10,
MAX8997_REG_GPIOCNTL11,
MAX8997_REG_GPIOCNTL12,
MAX8997_REG_LDO1CONFIG,
MAX8997_REG_LDO2CONFIG,
MAX8997_REG_LDO3CONFIG,
MAX8997_REG_LDO4CONFIG,
MAX8997_REG_LDO5CONFIG,
MAX8997_REG_LDO6CONFIG,
MAX8997_REG_LDO7CONFIG,
MAX8997_REG_LDO8CONFIG,
MAX8997_REG_LDO9CONFIG,
MAX8997_REG_LDO10CONFIG,
MAX8997_REG_LDO11CONFIG,
MAX8997_REG_LDO12CONFIG,
MAX8997_REG_LDO13CONFIG,
MAX8997_REG_LDO14CONFIG,
MAX8997_REG_LDO15CONFIG,
MAX8997_REG_LDO16CONFIG,
MAX8997_REG_LDO17CONFIG,
MAX8997_REG_LDO18CONFIG,
MAX8997_REG_LDO21CONFIG,
MAX8997_REG_DVSOKTIMER1,
MAX8997_REG_DVSOKTIMER2,
MAX8997_REG_DVSOKTIMER4,
MAX8997_REG_DVSOKTIMER5,
};
static u8 max8997_dumpaddr_muic[] = {
MAX8997_MUIC_REG_INTMASK1,
MAX8997_MUIC_REG_INTMASK2,
MAX8997_MUIC_REG_INTMASK3,
MAX8997_MUIC_REG_CDETCTRL,
MAX8997_MUIC_REG_CONTROL1,
MAX8997_MUIC_REG_CONTROL2,
MAX8997_MUIC_REG_CONTROL3,
};
static u8 max8997_dumpaddr_haptic[] = {
MAX8997_HAPTIC_REG_CONF1,
MAX8997_HAPTIC_REG_CONF2,
MAX8997_HAPTIC_REG_DRVCONF,
MAX8997_HAPTIC_REG_CYCLECONF1,
MAX8997_HAPTIC_REG_CYCLECONF2,
MAX8997_HAPTIC_REG_SIGCONF1,
MAX8997_HAPTIC_REG_SIGCONF2,
MAX8997_HAPTIC_REG_SIGCONF3,
MAX8997_HAPTIC_REG_SIGCONF4,
MAX8997_HAPTIC_REG_SIGDC1,
MAX8997_HAPTIC_REG_SIGDC2,
MAX8997_HAPTIC_REG_SIGPWMDC1,
MAX8997_HAPTIC_REG_SIGPWMDC2,
MAX8997_HAPTIC_REG_SIGPWMDC3,
MAX8997_HAPTIC_REG_SIGPWMDC4,
};
static int max8997_freeze(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int i;
for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
max8997_read_reg(i2c, max8997_dumpaddr_pmic[i],
&max8997->reg_dump[i]);
for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
max8997_read_reg(i2c, max8997_dumpaddr_muic[i],
&max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
max8997_read_reg(i2c, max8997_dumpaddr_haptic[i],
&max8997->reg_dump[i + MAX8997_REG_PMIC_END +
MAX8997_MUIC_REG_END]);
return 0;
}
static int max8997_restore(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
int i;
for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_pmic); i++)
max8997_write_reg(i2c, max8997_dumpaddr_pmic[i],
max8997->reg_dump[i]);
for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_muic); i++)
max8997_write_reg(i2c, max8997_dumpaddr_muic[i],
max8997->reg_dump[i + MAX8997_REG_PMIC_END]);
for (i = 0; i < ARRAY_SIZE(max8997_dumpaddr_haptic); i++)
max8997_write_reg(i2c, max8997_dumpaddr_haptic[i],
max8997->reg_dump[i + MAX8997_REG_PMIC_END +
MAX8997_MUIC_REG_END]);
return 0;
}
static int max8997_suspend(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
irq_set_irq_wake(max8997->irq, 1);
return 0;
}
static int max8997_resume(struct device *dev)
{
struct i2c_client *i2c = container_of(dev, struct i2c_client, dev);
struct max8997_dev *max8997 = i2c_get_clientdata(i2c);
if (device_may_wakeup(dev))
irq_set_irq_wake(max8997->irq, 0);
return max8997_irq_resume(max8997);
}
static const struct dev_pm_ops max8997_pm = {
.suspend = max8997_suspend,
.resume = max8997_resume,
.freeze = max8997_freeze,
.restore = max8997_restore,
};
static struct i2c_driver max8997_i2c_driver = {
.driver = {
.name = "max8997",
.owner = THIS_MODULE,
.pm = &max8997_pm,
},
.probe = max8997_i2c_probe,
.remove = max8997_i2c_remove,
.id_table = max8997_i2c_id,
};
static int __init max8997_i2c_init(void)
{
return i2c_add_driver(&max8997_i2c_driver);
}
/* init early so consumer devices can complete system boot */
subsys_initcall(max8997_i2c_init);
static void __exit max8997_i2c_exit(void)
{
i2c_del_driver(&max8997_i2c_driver);
}
module_exit(max8997_i2c_exit);
MODULE_DESCRIPTION("MAXIM 8997 multi-function core driver");
MODULE_AUTHOR("MyungJoo Ham <myungjoo.ham@samsung.com>");
MODULE_LICENSE("GPL");
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