MFD: DA9052/53 MFD core module add SPI support v2

This patch add SPI support for DA9052/53 MFD core module.

This patch is functionally tested on Samsung SMDKV6410.

Signed-off-by: David Dajun Chen <dchen@diasemi.com>
Signed-off-by: Ashish Jangam <ashish.jangam@kpitcummins.com>
Acked-by: Samuel Ortiz <sameo@linux.intel.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Ashish Jangam 2011-12-12 20:37:41 +05:30 committed by Mark Brown
parent 84c99db879
commit cfe04478fa
3 changed files with 128 additions and 0 deletions

View file

@ -332,6 +332,18 @@ config PMIC_DA9052
bool
select MFD_CORE
config MFD_DA9052_SPI
bool "Support Dialog Semiconductor DA9052/53 PMIC variants with SPI"
select REGMAP_SPI
select REGMAP_IRQ
select PMIC_DA9052
depends on SPI_MASTER=y
help
Support for the Dialog Semiconductor DA9052 PMIC
when controlled using SPI. This driver provides common support
for accessing the device, additional drivers must be enabled in
order to use the functionality of the device.
config MFD_DA9052_I2C
bool "Support Dialog Semiconductor DA9052/53 PMIC variants with I2C"
select REGMAP_I2C

View file

@ -69,6 +69,7 @@ obj-$(CONFIG_UCB1400_CORE) += ucb1400_core.o
obj-$(CONFIG_PMIC_DA903X) += da903x.o
obj-$(CONFIG_PMIC_DA9052) += da9052-core.o
obj-$(CONFIG_MFD_DA9052_SPI) += da9052-spi.o
obj-$(CONFIG_MFD_DA9052_I2C) += da9052-i2c.o
max8925-objs := max8925-core.o max8925-i2c.o

115
drivers/mfd/da9052-spi.c Normal file
View file

@ -0,0 +1,115 @@
/*
* SPI access for Dialog DA9052 PMICs.
*
* Copyright(c) 2011 Dialog Semiconductor Ltd.
*
* Author: David Dajun Chen <dchen@diasemi.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.
*
*/
#include <linux/device.h>
#include <linux/module.h>
#include <linux/input.h>
#include <linux/mfd/core.h>
#include <linux/spi/spi.h>
#include <linux/err.h>
#include <linux/mfd/da9052/da9052.h>
static int da9052_spi_probe(struct spi_device *spi)
{
int ret;
const struct spi_device_id *id = spi_get_device_id(spi);
struct da9052 *da9052 = kzalloc(sizeof(struct da9052), GFP_KERNEL);
if (!da9052)
return -ENOMEM;
spi->mode = SPI_MODE_0 | SPI_CPOL;
spi->bits_per_word = 8;
spi_setup(spi);
da9052->dev = &spi->dev;
da9052->chip_irq = spi->irq;
dev_set_drvdata(&spi->dev, da9052);
da9052_regmap_config.read_flag_mask = 1;
da9052_regmap_config.write_flag_mask = 0;
da9052->regmap = regmap_init_spi(spi, &da9052_regmap_config);
if (IS_ERR(da9052->regmap)) {
ret = PTR_ERR(da9052->regmap);
dev_err(&spi->dev, "Failed to allocate register map: %d\n",
ret);
goto err;
}
ret = da9052_device_init(da9052, id->driver_data);
if (ret != 0)
goto err;
return 0;
err:
kfree(da9052);
return ret;
}
static int da9052_spi_remove(struct spi_device *spi)
{
struct da9052 *da9052 = dev_get_drvdata(&spi->dev);
da9052_device_exit(da9052);
kfree(da9052);
return 0;
}
static struct spi_device_id da9052_spi_id[] = {
{"da9052", DA9052},
{"da9053-aa", DA9053_AA},
{"da9053-ba", DA9053_BA},
{"da9053-bb", DA9053_BB},
{}
};
static struct spi_driver da9052_spi_driver = {
.probe = da9052_spi_probe,
.remove = __devexit_p(da9052_spi_remove),
.id_table = da9052_spi_id,
.driver = {
.name = "da9052",
.bus = &spi_bus_type,
.owner = THIS_MODULE,
},
};
static int __init da9052_spi_init(void)
{
int ret;
ret = spi_register_driver(&da9052_spi_driver);
if (ret != 0) {
pr_err("Failed to register DA9052 SPI driver, %d\n", ret);
return ret;
}
return 0;
}
subsys_initcall(da9052_spi_init);
static void __exit da9052_spi_exit(void)
{
spi_unregister_driver(&da9052_spi_driver);
}
module_exit(da9052_spi_exit);
MODULE_AUTHOR("David Dajun Chen <dchen@diasemi.com>");
MODULE_DESCRIPTION("SPI driver for Dialog DA9052 PMIC");
MODULE_LICENSE("GPL");