diff options
Diffstat (limited to 'drivers/i2c/busses/scx200_i2c.c')
| -rw-r--r-- | drivers/i2c/busses/scx200_i2c.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/drivers/i2c/busses/scx200_i2c.c b/drivers/i2c/busses/scx200_i2c.c deleted file mode 100644 index 8eadf0f47ad7..000000000000 --- a/drivers/i2c/busses/scx200_i2c.c +++ /dev/null @@ -1,129 +0,0 @@ -/* 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: -*/ |