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mfd/ab8500: remove spi support

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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>
This commit is contained in:
Sundar Iyer 2010-12-24 11:52:08 +01:00 committed by Samuel Ortiz
parent 1d83864cab
commit 6680d940b8
3 changed files with 5 additions and 148 deletions
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8
drivers/mfd/Kconfig
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@ -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

2
drivers/mfd/Makefile
View File

@ -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

143
drivers/mfd/ab8500-spi.c
View File

@ -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");