[ARM] S3C: Move common GPIO code from plat-s3c24xx

Move the common parts of the GPIO code into plat-s3c
for use with both the s3c24xx and s3c64xx systems.

Signed-off-by: Ben Dooks <ben-linux@fluff.org>

1 files changed, 49 insertions, 0 deletions

diff --git a/arch/arm/plat-s3c/include/plat/gpio-core.h b/arch/arm/plat-s3c/include/plat/gpio-core.h
new file mode 100644
index 00000000000..3cb9105c481
--- /dev/null
+++ b/arch/arm/plat-s3c/include/plat/gpio-core.h
@@ -0,0 +1,49 @@
+/* linux/arch/arm/plat-s3c/include/plat/gpio-core.h
+ *
+ * Copyright 2008 Simtec Electronics
+ *	http://armlinux.simtec.co.uk/
+ *	Ben Dooks <ben@simtec.co.uk>
+ *
+ * S3C Platform - GPIO core
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+*/
+
+/* Define the core gpiolib support functions that the s3c platforms may
+ * need to extend or change depending on the hardware and the s3c chip
+ * selected at build or found at run time.
+ *
+ * These definitions are not intended for driver inclusion, there is
+ * nothing here that should not live outside the platform and core
+ * specific code.
+*/
+
+/**
+ * struct s3c_gpio_chip - wrapper for specific implementation of gpio
+ * @chip: The chip structure to be exported via gpiolib.
+ * @base: The base pointer to the gpio configuration registers.
+ *
+ * This wrapper provides the necessary information for the Samsung
+ * specific gpios being registered with gpiolib.
+ */
+struct s3c_gpio_chip {
+	struct gpio_chip	chip;
+	void __iomem		*base;
+};
+
+static inline struct s3c_gpio_chip *to_s3c_gpio(struct gpio_chip *gpc)
+{
+	return container_of(gpc, struct s3c_gpio_chip, chip);
+}
+
+/** s3c_gpiolib_add() - add the s3c specific version of a gpio_chip.
+ * @chip: The chip to register
+ *
+ * This is a wrapper to gpiochip_add() that takes our specific gpio chip
+ * information and makes the necessary alterations for the platform and
+ * notes the information for use with the configuration systems and any
+ * other parts of the system.
+ */
+extern void s3c_gpiolib_add(struct s3c_gpio_chip *chip);