ARM: mach-shmobile: R-Mobile A1 support.

This adds preliminary support for the R8A7740 (R-Mobile A1) CPU

Timer, serial, gic, clock are supported at this point.
This patch is based on v0.1 manual

Signed-off-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Paul Mundt <lethal@linux-sh.org>

arch/arm/mach-shmobile/intc-r8a7740.c

@@ -0,0 +1,45 @@
+/*
+ * R8A7740 processor support
+ *
+ * Copyright (C) 2011  Renesas Solutions Corp.
+ * Copyright (C) 2011  Kuninori Morimoto <kuninori.morimoto.gx@renesas.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; version 2 of the License.
+ *
+ * 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/irq.h>
+#include <linux/io.h>
+#include <asm/hardware/gic.h>
+
+#define INTA_CTRL	0xe605807c
+
+static int r8a7740_set_wake(struct irq_data *data, unsigned int on)
+{
+	return 0; /* always allow wakeup */
+}
+
+void __init r8a7740_init_irq(void)
+{
+	void __iomem *gic_dist_base = __io(0xf0001000);
+	void __iomem *gic_cpu_base = __io(0xf0000000);
+
+	/*
+	 * Change INT_SEL INTCA->GIC
+	 * (on GPIO)
+	 */
+	__raw_writel(__raw_readl(INTA_CTRL) & ~(1 << 1), INTA_CTRL);
+
+	gic_init(0, 29, gic_dist_base, gic_cpu_base);
+	gic_arch_extn.irq_set_wake = r8a7740_set_wake;
+}