GPIO: Add SPEAr GPIO driver

Tested on x600 (SPEAr600).

Signed-off-by: Stefan Roese <sr@denx.de>

arch/arm/include/asm/arch-spear/gpio.h

@@ -0,0 +1,40 @@
+/*
+ * Copyright (C) 2012 Stefan Roese <sr@denx.de>
+ *
+ * See file CREDITS for list of people who contributed to this
+ * project.
+ *
+ * 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
+ */
+
+
+#ifndef __ASM_ARCH_SPEAR_GPIO_H
+#define __ASM_ARCH_SPEAR_GPIO_H
+
+enum gpio_direction {
+	GPIO_DIRECTION_IN,
+	GPIO_DIRECTION_OUT,
+};
+
+struct gpio_regs {
+	u32 gpiodata[0x100];	/* 0x000 ... 0x3fc */
+	u32 gpiodir;		/* 0x400 */
+};
+
+#define SPEAR_GPIO_COUNT		8
+#define DATA_REG_ADDR(gpio)		(1 << (gpio + 2))
+
+#endif	/* __ASM_ARCH_SPEAR_GPIO_H */