[PATCH] chardev: GPIO for SCx200 & PC-8736x: add empty common-module

Add the nsc_gpio common-support module as an empty shell.  Next patch starts
the migration of the common gpio support routines.

Signed-off-by: Jim Cromie <jim.cromie@gmail.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

diff --git a/drivers/char/Makefile b/drivers/char/Makefile
index 524105597ea7d7ff82339902afc0c15cda691447..8bcaf4d803590c2aac5e2eb7288a30dbbf1e77ea 100644 (file)
--- a/drivers/char/Makefile
+++ b/drivers/char/Makefile
@@ -81,7 +81,7 @@ obj-$(CONFIG_COBALT_LCD)      += lcd.o
 obj-$(CONFIG_PPDEV)            += ppdev.o
 obj-$(CONFIG_NWBUTTON)         += nwbutton.o
 obj-$(CONFIG_NWFLASH)          += nwflash.o
-obj-$(CONFIG_SCx200_GPIO)      += scx200_gpio.o
+obj-$(CONFIG_SCx200_GPIO)      += scx200_gpio.o nsc_gpio.o
 obj-$(CONFIG_CS5535_GPIO)      += cs5535_gpio.o
 obj-$(CONFIG_GPIO_VR41XX)      += vr41xx_giu.o
 obj-$(CONFIG_TANBAC_TB0219)    += tb0219.o

diff --git a/drivers/char/nsc_gpio.c b/drivers/char/nsc_gpio.c
new file mode 100644 (file)
index 0000000..42d9590
--- /dev/null
+++ b/drivers/char/nsc_gpio.c
@@ -0,0 +1,45 @@
+/* linux/drivers/char/nsc_gpio.c
+
+   National Semiconductor common GPIO device-file/VFS methods.
+   Allows a user space process to control the GPIO pins.
+
+   Copyright (c) 2001,2002 Christer Weinigel <wingel@nano-system.com>
+   Copyright (c) 2005      Jim Cromie <jim.cromie@gmail.com>
+*/
+
+#include <linux/config.h>
+#include <linux/fs.h>
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/kernel.h>
+#include <linux/init.h>
+#include <linux/nsc_gpio.h>
+#include <asm/uaccess.h>
+#include <asm/io.h>
+
+#define NAME "nsc_gpio"
+
+MODULE_AUTHOR("Jim Cromie <jim.cromie@gmail.com>");
+MODULE_DESCRIPTION("NatSemi GPIO Common Methods");
+MODULE_LICENSE("GPL");
+
+static int __init nsc_gpio_init(void)
+{
+       printk(KERN_DEBUG NAME " initializing\n");
+       return 0;
+}
+
+static void __exit nsc_gpio_cleanup(void)
+{
+       printk(KERN_DEBUG NAME " cleanup\n");
+}
+
+/* prepare for
+   common routines for both scx200_gpio and pc87360_gpio
+EXPORT_SYMBOL(scx200_gpio_write);
+EXPORT_SYMBOL(scx200_gpio_read);
+EXPORT_SYMBOL(scx200_gpio_release);
+*/
+
+module_init(nsc_gpio_init);
+module_exit(nsc_gpio_cleanup);