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>

3 files changed, 5 insertions, 148 deletions

diff --git a/drivers/mfd/Kconfig b/drivers/mfd/Kconfig
index c32b62a8a1f..fd018366d67 100644
--- a/drivers/mfd/Kconfig
+++ b/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
diff --git a/drivers/mfd/Makefile b/drivers/mfd/Makefile
index 5f35de9386e..a54e2c7c6a1 100644
--- a/drivers/mfd/Makefile
+++ b/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
diff --git a/drivers/mfd/ab8500-spi.c b/drivers/mfd/ab8500-spi.c
deleted file mode 100644
index b1653421edb..00000000000
--- a/drivers/mfd/ab8500-spi.c
+++ /dev/null
@@ -1,143 +0,0 @@
-/*
- * 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");