mfd/ab8500: remove spi support

Since the Ab8500 v1.0, the SPI support is deprecated on the HW.
Signed-off-by: Sundar Iyer <sundar.iyer@stericsson.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

drivers/mfd/Kconfig

@@ -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

@@ -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

-/*
- * 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");