ar7: remove gpio character device

There are no obvious users, and any out of tree users should convert to
one of the generic APIs.

Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>

target/linux/ar7/config-3.18

@@ -1,6 +1,5 @@
 CONFIG_ADM6996_PHY=y
 CONFIG_AR7=y
-CONFIG_AR7_GPIO=y
 CONFIG_AR7_TI=y
 # CONFIG_AR7_TYPE_AC49X is not set
 CONFIG_AR7_TYPE_TI=y

target/linux/ar7/config-4.1

@@ -1,6 +1,5 @@
 CONFIG_ADM6996_PHY=y
 CONFIG_AR7=y
-CONFIG_AR7_GPIO=y
 CONFIG_AR7_TI=y
 # CONFIG_AR7_TYPE_AC49X is not set
 CONFIG_AR7_TYPE_TI=y

target/linux/ar7/files/drivers/char/ar7_gpio.c

@@ -1,158 +0,0 @@
-/*
- * Copyright (C) 2007 Nicolas Thill <nico@openwrt.org>
- *
- * 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., 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
- */
-
-#include <linux/device.h>
-#include <linux/fs.h>
-#include <linux/module.h>
-#include <linux/errno.h>
-#include <linux/kernel.h>
-#include <linux/init.h>
-#include <linux/platform_device.h>
-#include <linux/uaccess.h>
-#include <linux/io.h>
-#include <linux/types.h>
-#include <linux/cdev.h>
-#include <gpio.h>
-
-#define DRVNAME "ar7_gpio"
-#define LONGNAME "TI AR7 GPIOs Driver"
-
-MODULE_AUTHOR("Nicolas Thill <nico@openwrt.org>");
-MODULE_DESCRIPTION(LONGNAME);
-MODULE_LICENSE("GPL");
-
-static int ar7_gpio_major;
-
-static ssize_t ar7_gpio_write(struct file *file, const char __user *buf,
-	size_t len, loff_t *ppos)
-{
-	int pin = iminor(file->f_path.dentry->d_inode);
-	size_t i;
-
-	for (i = 0; i < len; ++i) {
-		char c;
-		if (get_user(c, buf + i))
-			return -EFAULT;
-		switch (c) {
-		case '0':
-			gpio_set_value(pin, 0);
-			break;
-		case '1':
-			gpio_set_value(pin, 1);
-			break;
-		case 'd':
-		case 'D':
-			ar7_gpio_disable(pin);
-			break;
-		case 'e':
-		case 'E':
-			ar7_gpio_enable(pin);
-			break;
-		case 'i':
-		case 'I':
-		case '<':
-			gpio_direction_input(pin);
-			break;
-		case 'o':
-		case 'O':
-		case '>':
-			gpio_direction_output(pin, 0);
-			break;
-		default:
-			return -EINVAL;
-		}
-	}
-
-	return len;
-}
-
-static ssize_t ar7_gpio_read(struct file *file, char __user *buf,
-	size_t len, loff_t *ppos)
-{
-	int pin = iminor(file->f_path.dentry->d_inode);
-	int value;
-
-	value = gpio_get_value(pin);
-	if (put_user(value ? '1' : '0', buf))
-		return -EFAULT;
-
-	return 1;
-}
-
-static int ar7_gpio_open(struct inode *inode, struct file *file)
-{
-	int m = iminor(inode);
-
-	if (m >= (ar7_is_titan() ? TITAN_GPIO_MAX : AR7_GPIO_MAX))
-		return -EINVAL;
-
-	return nonseekable_open(inode, file);
-}
-
-static int ar7_gpio_release(struct inode *inode, struct file *file)
-{
-	return 0;
-}
-
-static const struct file_operations ar7_gpio_fops = {
-	.owner   = THIS_MODULE,
-	.write   = ar7_gpio_write,
-	.read    = ar7_gpio_read,
-	.open    = ar7_gpio_open,
-	.release = ar7_gpio_release,
-	.llseek  = no_llseek,
-};
-
-static struct platform_device *ar7_gpio_device;
-
-static int __init ar7_gpio_char_init(void)
-{
-	int rc;
-
-	ar7_gpio_device = platform_device_alloc(DRVNAME, -1);
-	if (!ar7_gpio_device)
-		return -ENOMEM;
-
-	rc = platform_device_add(ar7_gpio_device);
-	if (rc < 0)
-		goto out_put;
-
-	rc = register_chrdev(ar7_gpio_major, DRVNAME, &ar7_gpio_fops);
-	if (rc < 0)
-		goto out_put;
-
-	ar7_gpio_major = rc;
-
-	rc = 0;
-
-	goto out;
-
-out_put:
-	platform_device_put(ar7_gpio_device);
-out:
-	return rc;
-}
-
-static void __exit ar7_gpio_char_exit(void)
-{
-	unregister_chrdev(ar7_gpio_major, DRVNAME);
-	platform_device_unregister(ar7_gpio_device);
-}
-
-module_init(ar7_gpio_char_init);
-module_exit(ar7_gpio_char_exit);

target/linux/ar7/patches-3.18/120-gpio_chrdev.patch

@@ -1,28 +0,0 @@
---- a/drivers/char/Kconfig
-+++ b/drivers/char/Kconfig
-@@ -452,6 +452,15 @@ config MWAVE
- 	  To compile this driver as a module, choose M here: the
- 	  module will be called mwave.
- 
-+config AR7_GPIO
-+	tristate "TI AR7 GPIO Support"
-+	depends on AR7
-+	help
-+	  Give userspace access to the GPIO pins on the Texas Instruments AR7
-+	  processors.
-+
-+	  If compiled as a module, it will be called ar7_gpio.
-+
- config SCx200_GPIO
- 	tristate "NatSemi SCx200 GPIO Support"
- 	depends on SCx200
---- a/drivers/char/Makefile
-+++ b/drivers/char/Makefile
-@@ -42,6 +42,7 @@ obj-$(CONFIG_HW_RANDOM)		+= hw_random/
- obj-$(CONFIG_PPDEV)		+= ppdev.o
- obj-$(CONFIG_NWBUTTON)		+= nwbutton.o
- obj-$(CONFIG_NWFLASH)		+= nwflash.o
-+obj-$(CONFIG_AR7_GPIO)		+= ar7_gpio.o
- obj-$(CONFIG_SCx200_GPIO)	+= scx200_gpio.o
- obj-$(CONFIG_PC8736x_GPIO)	+= pc8736x_gpio.o
- obj-$(CONFIG_NSC_GPIO)		+= nsc_gpio.o

target/linux/ar7/patches-4.1/120-gpio_chrdev.patch

@@ -1,28 +0,0 @@
---- a/drivers/char/Kconfig
-+++ b/drivers/char/Kconfig
-@@ -461,6 +461,15 @@ config MWAVE
- 	  To compile this driver as a module, choose M here: the
- 	  module will be called mwave.
- 
-+config AR7_GPIO
-+	tristate "TI AR7 GPIO Support"
-+	depends on AR7
-+	help
-+	  Give userspace access to the GPIO pins on the Texas Instruments AR7
-+	  processors.
-+
-+	  If compiled as a module, it will be called ar7_gpio.
-+
- config SCx200_GPIO
- 	tristate "NatSemi SCx200 GPIO Support"
- 	depends on SCx200
---- a/drivers/char/Makefile
-+++ b/drivers/char/Makefile
-@@ -42,6 +42,7 @@ obj-$(CONFIG_HW_RANDOM)		+= hw_random/
- obj-$(CONFIG_PPDEV)		+= ppdev.o
- obj-$(CONFIG_NWBUTTON)		+= nwbutton.o
- obj-$(CONFIG_NWFLASH)		+= nwflash.o
-+obj-$(CONFIG_AR7_GPIO)		+= ar7_gpio.o
- obj-$(CONFIG_SCx200_GPIO)	+= scx200_gpio.o
- obj-$(CONFIG_PC8736x_GPIO)	+= pc8736x_gpio.o
- obj-$(CONFIG_NSC_GPIO)		+= nsc_gpio.o