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Commit 5fddf5aa authored by Wolfram Sang's avatar Wolfram Sang
Browse files

i2c: scx200: drop GPIO based i2c driver 



This driver is marked as deprecated since the pre-git era. Any user
left(?) should really have switched to i2c-gpio meanwhile.

Signed-off-by: default avatarWolfram Sang <wsa@the-dreams.de>
Acked-by: default avatarJim Cromie <jim.cromie@gmail.com>
parent 8fe8bc77

drivers/i2c/busses/Kconfig

+0 −31
Original line number Diff line number Diff line
@@ -1008,37 +1008,6 @@ config I2C_CROS_EC_TUNNEL 
	  connected there. This will work whatever the interface used to

	  talk to the EC (SPI, I2C or LPC).



config SCx200_I2C

	tristate "NatSemi SCx200 I2C using GPIO pins (DEPRECATED)"

	depends on SCx200_GPIO

	select I2C_ALGOBIT

	help

	  Enable the use of two GPIO pins of a SCx200 processor as an I2C bus.



	  If you don't know what to do here, say N.



	  This support is also available as a module.  If so, the module

	  will be called scx200_i2c.



	  This driver is deprecated and will be dropped soon. Use i2c-gpio

	  (or scx200_acb) instead.



config SCx200_I2C_SCL

	int "GPIO pin used for SCL"

	depends on SCx200_I2C

	default "12"

	help

	  Enter the GPIO pin number used for the SCL signal.  This value can

	  also be specified with a module parameter.



config SCx200_I2C_SDA

	int "GPIO pin used for SDA"

	depends on SCx200_I2C

	default "13"

	help

	  Enter the GPIO pin number used for the SSA signal.  This value can

	  also be specified with a module parameter.



config SCx200_ACB

	tristate "Geode ACCESS.bus support"

	depends on X86_32 && PCI

drivers/i2c/busses/Makefile

+0 −1
Original line number Diff line number Diff line
@@ -100,6 +100,5 @@ obj-$(CONFIG_I2C_ELEKTOR) += i2c-elektor.o 
obj-$(CONFIG_I2C_PCA_ISA)	+= i2c-pca-isa.o

obj-$(CONFIG_I2C_SIBYTE)	+= i2c-sibyte.o

obj-$(CONFIG_SCx200_ACB)	+= scx200_acb.o

obj-$(CONFIG_SCx200_I2C)	+= scx200_i2c.o



ccflags-$(CONFIG_I2C_DEBUG_BUS) := -DDEBUG

drivers/i2c/busses/scx200_i2c.c

deleted100644 → 0
+0 −129
Original line number Diff line number Diff line 
/* linux/drivers/i2c/busses/scx200_i2c.c



   Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>



   National Semiconductor SCx200 I2C bus on GPIO pins



   Based on i2c-velleman.c Copyright (C) 1995-96, 2000 Simon G. Vogl



   This program is free software; you can redistribute it and/or modify

   it under the terms of the GNU General Public License as published by

   the Free Software Foundation; either version 2 of the License, or

   (at your option) any later version.

   

   This program is distributed in the hope that it will be useful,

   but WITHOUT ANY WARRANTY; without even the implied warranty of

   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

   GNU General Public License for more details.

   

   You should have received a copy of the GNU General Public License

   along with this program; if not, write to the Free Software

   Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.		     

*/



#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt



#include <linux/module.h>

#include <linux/errno.h>

#include <linux/kernel.h>

#include <linux/i2c.h>

#include <linux/i2c-algo-bit.h>

#include <linux/io.h>



#include <linux/scx200_gpio.h>



MODULE_AUTHOR("Christer Weinigel <wingel@nano-system.com>");

MODULE_DESCRIPTION("NatSemi SCx200 I2C Driver");

MODULE_LICENSE("GPL");



static int scl = CONFIG_SCx200_I2C_SCL;

static int sda = CONFIG_SCx200_I2C_SDA;



module_param(scl, int, 0);

MODULE_PARM_DESC(scl, "GPIO line for SCL");

module_param(sda, int, 0);

MODULE_PARM_DESC(sda, "GPIO line for SDA");



static void scx200_i2c_setscl(void *data, int state)

{

	scx200_gpio_set(scl, state);

}



static void scx200_i2c_setsda(void *data, int state)

{

	scx200_gpio_set(sda, state);

} 



static int scx200_i2c_getscl(void *data)

{

	return scx200_gpio_get(scl);

}



static int scx200_i2c_getsda(void *data)

{

	return scx200_gpio_get(sda);

}



/* ------------------------------------------------------------------------

 * Encapsulate the above functions in the correct operations structure.

 * This is only done when more than one hardware adapter is supported.

 */



static struct i2c_algo_bit_data scx200_i2c_data = {

	.setsda		= scx200_i2c_setsda,

	.setscl		= scx200_i2c_setscl,

	.getsda		= scx200_i2c_getsda,

	.getscl		= scx200_i2c_getscl,

	.udelay		= 10,

	.timeout	= HZ,

};



static struct i2c_adapter scx200_i2c_ops = {

	.owner		   = THIS_MODULE,

	.class             = I2C_CLASS_HWMON | I2C_CLASS_SPD,

	.algo_data	   = &scx200_i2c_data,

	.name	= "NatSemi SCx200 I2C",

};



static int scx200_i2c_init(void)

{

	pr_debug("NatSemi SCx200 I2C Driver\n");



	if (!scx200_gpio_present()) {

		pr_err("no SCx200 gpio pins available\n");

		return -ENODEV;

	}



	pr_debug("SCL=GPIO%02u, SDA=GPIO%02u\n", scl, sda);



	if (scl == -1 || sda == -1 || scl == sda) {

		pr_err("scl and sda must be specified\n");

		return -EINVAL;

	}



	/* Configure GPIOs as open collector outputs */

	scx200_gpio_configure(scl, ~2, 5);

	scx200_gpio_configure(sda, ~2, 5);



	if (i2c_bit_add_bus(&scx200_i2c_ops) < 0) {

		pr_err("adapter %s registration failed\n", scx200_i2c_ops.name);

		return -ENODEV;

	}

	

	return 0;

}



static void scx200_i2c_cleanup(void)

{

	i2c_del_adapter(&scx200_i2c_ops);

}



module_init(scx200_i2c_init);

module_exit(scx200_i2c_cleanup);



/*

    Local variables:

        compile-command: "make -k -C ../.. SUBDIRS=drivers/i2c modules"

        c-basic-offset: 8

    End:

*/