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Commit cfe04478 authored by Ashish Jangam's avatar Ashish Jangam Committed by Mark Brown
Browse files

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: default avatarDavid Dajun Chen <dchen@diasemi.com>
Signed-off-by: default avatarAshish Jangam <ashish.jangam@kpitcummins.com>
Acked-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
Signed-off-by: default avatarMark Brown <broonie@opensource.wolfsonmicro.com>
parent 84c99db8

drivers/mfd/Kconfig

+12 −0
Original line number Diff line number Diff line
@@ -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

drivers/mfd/Makefile

+1 −0
Original line number Diff line number Diff line
@@ -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

drivers/mfd/da9052-spi.c

0 → 100644
+115 −0
Original line number Diff line number Diff line 
/*

 * 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");