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i2c: some overdue driver removal

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This patch contains the overdue removal of three I2C drivers.

[JD: In fact only i2c-ixp4xx can be removed at the moment, the other two
platforms don't implement the generic GPIO layer yet.]

Signed-off-by: Adrian Bunk <bunk@kernel.org>
Signed-off-by: Jean Delvare <khali@linux-fr.org>
This commit is contained in:
Adrian Bunk 2008-01-27 18:14:46 +01:00 committed by Jean Delvare
parent 5a4a238771
commit 7e8b99251b
6 changed files with 0 additions and 213 deletions
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8
Documentation/feature-removal-schedule.txt
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@ -225,14 +225,6 @@ Who: Len Brown <len.brown@intel.com>
---------------------------
What: i2c-ixp2000, i2c-ixp4xx and scx200_i2c drivers
When: September 2007
Why: Obsolete. The new i2c-gpio driver replaces all hardware-specific
I2C-over-GPIO drivers.
Who: Jean Delvare <khali@linux-fr.org>
---------------------------
What: 'time' kernel boot parameter
When: January 2008
Why: replaced by 'printk.time=<value>' so that printk timestamps can be

14
drivers/i2c/busses/Kconfig
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@ -259,20 +259,6 @@ config I2C_IOP3XX
This driver can also be built as a module. If so, the module
will be called i2c-iop3xx.
config I2C_IXP4XX
tristate "IXP4xx GPIO-Based I2C Interface (DEPRECATED)"
depends on ARCH_IXP4XX
select I2C_ALGOBIT
help
Say Y here if you have an Intel IXP4xx(420,421,422,425) based
system and are using GPIO lines for an I2C bus.
This support is also available as a module. If so, the module
will be called i2c-ixp4xx.
This driver is deprecated and will be dropped soon. Use i2c-gpio
instead.
config I2C_IXP2000
tristate "IXP2000 GPIO-Based I2C Interface (DEPRECATED)"
depends on ARCH_IXP2000

1
drivers/i2c/busses/Makefile
View File

@ -20,7 +20,6 @@ obj-$(CONFIG_I2C_I810) += i2c-i810.o
obj-$(CONFIG_I2C_IBM_IIC) += i2c-ibm_iic.o
obj-$(CONFIG_I2C_IOP3XX) += i2c-iop3xx.o
obj-$(CONFIG_I2C_IXP2000) += i2c-ixp2000.o
obj-$(CONFIG_I2C_IXP4XX) += i2c-ixp4xx.o
obj-$(CONFIG_I2C_POWERMAC) += i2c-powermac.o
obj-$(CONFIG_I2C_MPC) += i2c-mpc.o
obj-$(CONFIG_I2C_MV64XXX) += i2c-mv64xxx.o

178
drivers/i2c/busses/i2c-ixp4xx.c
View File

@ -1,178 +0,0 @@
/*
* drivers/i2c/busses/i2c-ixp4xx.c
*
* Intel's IXP4xx XScale NPU chipsets (IXP420, 421, 422, 425) do not have
* an on board I2C controller but provide 16 GPIO pins that are often
* used to create an I2C bus. This driver provides an i2c_adapter
* interface that plugs in under algo_bit and drives the GPIO pins
* as instructed by the alogorithm driver.
*
* Author: Deepak Saxena <dsaxena@plexity.net>
*
* Copyright (c) 2003-2004 MontaVista Software Inc.
*
* This file is licensed under the terms of the GNU General Public
* License version 2. This program is licensed "as is" without any
* warranty of any kind, whether express or implied.
*
* NOTE: Since different platforms will use different GPIO pins for
* I2C, this driver uses an IXP4xx-specific platform_data
* pointer to pass the GPIO numbers to the driver. This
* allows us to support all the different IXP4xx platforms
* w/o having to put #ifdefs in this driver.
*
* See arch/arm/mach-ixp4xx/ixdp425.c for an example of building a
* device list and filling in the ixp4xx_i2c_pins data structure
* that is passed as the platform_data to this driver.
*/
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/platform_device.h>
#include <linux/module.h>
#include <linux/i2c.h>
#include <linux/i2c-algo-bit.h>
#include <asm/hardware.h> /* Pick up IXP4xx-specific bits */
static inline int ixp4xx_scl_pin(void *data)
{
return ((struct ixp4xx_i2c_pins*)data)->scl_pin;
}
static inline int ixp4xx_sda_pin(void *data)
{
return ((struct ixp4xx_i2c_pins*)data)->sda_pin;
}
static void ixp4xx_bit_setscl(void *data, int val)
{
gpio_line_set(ixp4xx_scl_pin(data), 0);
gpio_line_config(ixp4xx_scl_pin(data),
val ? IXP4XX_GPIO_IN : IXP4XX_GPIO_OUT );
}
static void ixp4xx_bit_setsda(void *data, int val)
{
gpio_line_set(ixp4xx_sda_pin(data), 0);
gpio_line_config(ixp4xx_sda_pin(data),
val ? IXP4XX_GPIO_IN : IXP4XX_GPIO_OUT );
}
static int ixp4xx_bit_getscl(void *data)
{
int scl;
gpio_line_config(ixp4xx_scl_pin(data), IXP4XX_GPIO_IN );
gpio_line_get(ixp4xx_scl_pin(data), &scl);
return scl;
}
static int ixp4xx_bit_getsda(void *data)
{
int sda;
gpio_line_config(ixp4xx_sda_pin(data), IXP4XX_GPIO_IN );
gpio_line_get(ixp4xx_sda_pin(data), &sda);
return sda;
}
struct ixp4xx_i2c_data {
struct ixp4xx_i2c_pins *gpio_pins;
struct i2c_adapter adapter;
struct i2c_algo_bit_data algo_data;
};
static int ixp4xx_i2c_remove(struct platform_device *plat_dev)
{
struct ixp4xx_i2c_data *drv_data = platform_get_drvdata(plat_dev);
platform_set_drvdata(plat_dev, NULL);
i2c_del_adapter(&drv_data->adapter);
kfree(drv_data);
return 0;
}
static int ixp4xx_i2c_probe(struct platform_device *plat_dev)
{
int err;
struct ixp4xx_i2c_pins *gpio = plat_dev->dev.platform_data;
struct ixp4xx_i2c_data *drv_data =
kzalloc(sizeof(struct ixp4xx_i2c_data), GFP_KERNEL);
if(!drv_data)
return -ENOMEM;
drv_data->gpio_pins = gpio;
/*
* We could make a lot of these structures static, but
* certain platforms may have multiple GPIO-based I2C
* buses for various device domains, so we need per-device
* algo_data->data.
*/
drv_data->algo_data.data = gpio;
drv_data->algo_data.setsda = ixp4xx_bit_setsda;
drv_data->algo_data.setscl = ixp4xx_bit_setscl;
drv_data->algo_data.getsda = ixp4xx_bit_getsda;
drv_data->algo_data.getscl = ixp4xx_bit_getscl;
drv_data->algo_data.udelay = 10;
drv_data->algo_data.timeout = 100;
drv_data->adapter.id = I2C_HW_B_IXP4XX;
drv_data->adapter.class = I2C_CLASS_HWMON;
strlcpy(drv_data->adapter.name, plat_dev->dev.driver->name,
sizeof(drv_data->adapter.name));
drv_data->adapter.algo_data = &drv_data->algo_data;
drv_data->adapter.dev.parent = &plat_dev->dev;
gpio_line_config(gpio->scl_pin, IXP4XX_GPIO_IN);
gpio_line_config(gpio->sda_pin, IXP4XX_GPIO_IN);
gpio_line_set(gpio->scl_pin, 0);
gpio_line_set(gpio->sda_pin, 0);
err = i2c_bit_add_bus(&drv_data->adapter);
if (err) {
printk(KERN_ERR "ERROR: Could not install %s\n", plat_dev->dev.bus_id);
kfree(drv_data);
return err;
}
platform_set_drvdata(plat_dev, drv_data);
return 0;
}
static struct platform_driver ixp4xx_i2c_driver = {
.probe = ixp4xx_i2c_probe,
.remove = ixp4xx_i2c_remove,
.driver = {
.name = "IXP4XX-I2C",
.owner = THIS_MODULE,
},
};
static int __init ixp4xx_i2c_init(void)
{
return platform_driver_register(&ixp4xx_i2c_driver);
}
static void __exit ixp4xx_i2c_exit(void)
{
platform_driver_unregister(&ixp4xx_i2c_driver);
}
module_init(ixp4xx_i2c_init);
module_exit(ixp4xx_i2c_exit);
MODULE_DESCRIPTION("GPIO-based I2C adapter for IXP4xx systems");
MODULE_LICENSE("GPL");
MODULE_AUTHOR("Deepak Saxena <dsaxena@plexity.net>");

11
include/asm-arm/arch-ixp4xx/platform.h
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@ -75,17 +75,6 @@ extern unsigned long ixp4xx_exp_bus_size;
#define IXP4XX_PERIPHERAL_BUS_CLOCK (66) /* 66Mhzi APB BUS */
#define IXP4XX_UART_XTAL 14745600
/*
* The IXP4xx chips do not have an I2C unit, so GPIO lines are just
* used to
* Used as platform_data to provide GPIO pin information to the ixp42x
* I2C driver.
*/
struct ixp4xx_i2c_pins {
unsigned long sda_pin;
unsigned long scl_pin;
};
/*
* This structure provide a means for the board setup code
* to give information to th pata_ixp4xx driver. It is

1
include/linux/i2c-id.h
View File

@ -191,7 +191,6 @@
#define I2C_HW_B_OMAHA 0x010014 /* Omaha I2C interface (ARM) */
#define I2C_HW_B_GUIDE 0x010015 /* Guide bit-basher */
#define I2C_HW_B_IXP2000 0x010016 /* GPIO on IXP2000 systems */
#define I2C_HW_B_IXP4XX 0x010017 /* GPIO on IXP4XX systems */
#define I2C_HW_B_S3VIA 0x010018 /* S3Via ProSavage adapter */
#define I2C_HW_B_ZR36067 0x010019 /* Zoran-36057/36067 based boards */
#define I2C_HW_B_PCILYNX 0x01001a /* TI PCILynx I2C adapter */