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Commit 6680d940 authored by Sundar Iyer's avatar Sundar Iyer Committed by Samuel Ortiz
Browse files

mfd/ab8500: remove spi support 



Since the Ab8500 v1.0, the SPI support is deprecated on the HW.

Signed-off-by: default avatarSundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: default avatarSamuel Ortiz <sameo@linux.intel.com>
parent 1d83864c

drivers/mfd/Kconfig

+4 −4
Original line number Diff line number Diff line
@@ -496,13 +496,13 @@ config EZX_PCAP 


config AB8500_CORE

	bool "ST-Ericsson AB8500 Mixed Signal Power Management chip"

	depends on GENERIC_HARDIRQS && ABX500_CORE && SPI_MASTER

	depends on GENERIC_HARDIRQS && ABX500_CORE

	select MFD_CORE

	help

	  Select this option to enable access to AB8500 power management

	  chip. This connects to U8500 either on the SSP/SPI bus

	  or the I2C bus via PRCMU. It also adds the irq_chip

	  parts for handling the Mixed Signal chip events.

	  chip. This connects to U8500 either on the SSP/SPI bus (deprecated

	  since hardware version v1.0) or the I2C bus via PRCMU. It also adds

	  the irq_chip parts for handling the Mixed Signal chip events.

	  This chip embeds various other multimedia funtionalities as well.



config AB8500_I2C_CORE

drivers/mfd/Makefile

+1 −1
Original line number Diff line number Diff line
@@ -70,7 +70,7 @@ obj-$(CONFIG_ABX500_CORE) += abx500-core.o 
obj-$(CONFIG_AB3100_CORE)	+= ab3100-core.o

obj-$(CONFIG_AB3100_OTP)	+= ab3100-otp.o

obj-$(CONFIG_AB3550_CORE)	+= ab3550-core.o

obj-$(CONFIG_AB8500_CORE)	+= ab8500-core.o ab8500-spi.o

obj-$(CONFIG_AB8500_CORE)	+= ab8500-core.o

obj-$(CONFIG_AB8500_I2C_CORE)	+= ab8500-i2c.o

obj-$(CONFIG_AB8500_DEBUG)	+= ab8500-debugfs.o

obj-$(CONFIG_MFD_TIMBERDALE)    += timberdale.o

drivers/mfd/ab8500-spi.c

deleted100644 → 0
+0 −143
Original line number Diff line number Diff line 
/*

 * Copyright (C) ST-Ericsson SA 2010

 *

 * License Terms: GNU General Public License v2

 * Author: Srinidhi Kasagar <srinidhi.kasagar@stericsson.com>

 */



#include <linux/kernel.h>

#include <linux/slab.h>

#include <linux/init.h>

#include <linux/module.h>

#include <linux/platform_device.h>

#include <linux/spi/spi.h>

#include <linux/mfd/ab8500.h>



/*

 * This funtion writes to any AB8500 registers using

 * SPI protocol &  before it writes it packs the data

 * in the below 24 bit frame format

 *

 *	 *|------------------------------------|

 *	 *| 23|22...18|17.......10|9|8|7......0|

 *	 *| r/w  bank       adr          data  |

 *	 * ------------------------------------

 *

 * This function shouldn't be called from interrupt

 * context

 */

static int ab8500_spi_write(struct ab8500 *ab8500, u16 addr, u8 data)

{

	struct spi_device *spi = container_of(ab8500->dev, struct spi_device,

					      dev);

	unsigned long spi_data = addr << 10 | data;

	struct spi_transfer xfer;

	struct spi_message msg;



	ab8500->tx_buf[0] = spi_data;

	ab8500->rx_buf[0] = 0;



	xfer.tx_buf	= ab8500->tx_buf;

	xfer.rx_buf	= NULL;

	xfer.len	= sizeof(unsigned long);



	spi_message_init(&msg);

	spi_message_add_tail(&xfer, &msg);



	return spi_sync(spi, &msg);

}



static int ab8500_spi_read(struct ab8500 *ab8500, u16 addr)

{

	struct spi_device *spi = container_of(ab8500->dev, struct spi_device,

					      dev);

	unsigned long spi_data = 1 << 23 | addr << 10;

	struct spi_transfer xfer;

	struct spi_message msg;

	int ret;



	ab8500->tx_buf[0] = spi_data;

	ab8500->rx_buf[0] = 0;



	xfer.tx_buf	= ab8500->tx_buf;

	xfer.rx_buf	= ab8500->rx_buf;

	xfer.len	= sizeof(unsigned long);



	spi_message_init(&msg);

	spi_message_add_tail(&xfer, &msg);



	ret = spi_sync(spi, &msg);

	if (!ret)

		/*

		 * Only the 8 lowermost bytes are

		 * defined with value, the rest may

		 * vary depending on chip/board noise.

		 */

		ret = ab8500->rx_buf[0] & 0xFFU;



	return ret;

}



static int __devinit ab8500_spi_probe(struct spi_device *spi)

{

	struct ab8500 *ab8500;

	int ret;



	spi->bits_per_word = 24;

	ret = spi_setup(spi);

	if (ret < 0)

		return ret;



	ab8500 = kzalloc(sizeof *ab8500, GFP_KERNEL);

	if (!ab8500)

		return -ENOMEM;



	ab8500->dev = &spi->dev;

	ab8500->irq = spi->irq;



	ab8500->read = ab8500_spi_read;

	ab8500->write = ab8500_spi_write;



	spi_set_drvdata(spi, ab8500);



	ret = ab8500_init(ab8500);

	if (ret)

		kfree(ab8500);



	return ret;

}



static int __devexit ab8500_spi_remove(struct spi_device *spi)

{

	struct ab8500 *ab8500 = spi_get_drvdata(spi);



	ab8500_exit(ab8500);

	kfree(ab8500);



	return 0;

}



static struct spi_driver ab8500_spi_driver = {

	.driver = {

		.name = "ab8500-spi",

		.owner = THIS_MODULE,

	},

	.probe	= ab8500_spi_probe,

	.remove	= __devexit_p(ab8500_spi_remove)

};



static int __init ab8500_spi_init(void)

{

	return spi_register_driver(&ab8500_spi_driver);

}

subsys_initcall(ab8500_spi_init);



static void __exit ab8500_spi_exit(void)

{

	spi_unregister_driver(&ab8500_spi_driver);

}

module_exit(ab8500_spi_exit);



MODULE_AUTHOR("Srinidhi KASAGAR <srinidhi.kasagar@stericsson.com");

MODULE_DESCRIPTION("AB8500 SPI");

MODULE_LICENSE("GPL v2");