omap: reuse omap3 gpio support in omap4

Signed-off-by: Aneesh V <aneesh@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>

1 files changed, 65 insertions, 0 deletions

diff --git a/arch/arm/include/asm/omap_gpio.h b/arch/arm/include/asm/omap_gpio.h
new file mode 100644
index 0000000000..3089e1c985
--- /dev/null
+++ b/arch/arm/include/asm/omap_gpio.h
@@ -0,0 +1,65 @@
+/*
+ * Copyright (c) 2009 Wind River Systems, Inc.
+ * Tom Rix <Tom.Rix@windriver.com>
+ *
+ * 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., 59 Temple Place, Suite 330, Boston,
+ * MA 02111-1307 USA
+ *
+ * This work is derived from the linux 2.6.27 kernel source
+ * To fetch, use the kernel repository
+ * git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6.git
+ * Use the v2.6.27 tag.
+ *
+ * Below is the original's header including its copyright
+ *
+ *  linux/arch/arm/plat-omap/gpio.c
+ *
+ * Support functions for OMAP GPIO
+ *
+ * Copyright (C) 2003-2005 Nokia Corporation
+ * Written by Juha Yrjölä <juha.yrjola@nokia.com>
+ *
+ * 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.
+ */
+#ifndef _GPIO_H
+#define _GPIO_H
+
+#include <asm/arch/cpu.h>
+
+struct gpio_bank {
+	void *base;
+	int method;
+};
+
+extern const struct gpio_bank *const omap_gpio_bank;
+
+#define METHOD_GPIO_24XX	4
+
+/* This is the interface */
+
+/* Request a gpio before using it */
+int omap_request_gpio(int gpio);
+/* Reset and free a gpio after using it */
+void omap_free_gpio(int gpio);
+/* Sets the gpio as input or output */
+void omap_set_gpio_direction(int gpio, int is_input);
+/* Set or clear a gpio output */
+void omap_set_gpio_dataout(int gpio, int enable);
+/* Get the value of a gpio input */
+int omap_get_gpio_datain(int gpio);
+
+#endif /* _GPIO_H_ */