omap2: add SDRC register defines

Create sdrc.h, containing symbolic constants for SDRC registers and
sdrc_{read,write}_reg() to read and write those registers.
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

arch/arm/mach-omap2/sdrc.h

+#ifndef __ARCH_ARM_MACH_OMAP2_SDRC_H
+#define __ARCH_ARM_MACH_OMAP2_SDRC_H
+
+/*
+ * OMAP2 SDRC register definitions
+ *
+ * Copyright (C) 2007 Texas Instruments, Inc.
+ * Copyright (C) 2007 Nokia Corporation
+ *
+ * Written by Paul Walmsley
+ *
+ * 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.
+ */
+
+#include <linux/kernel.h>
+#include <asm/arch/io.h>
+
+
+#define OMAP_SDRC_REGADDR(reg)	(void __iomem *)IO_ADDRESS(OMAP2_SDRC_BASE + reg)
+
+/* SDRC register offsets - read/write with sdrc_{read,write}_reg() */
+
+#define SDRC_SYSCONFIG		0x010
+#define SDRC_DLLA_CTRL		0x060
+#define SDRC_DLLA_STATUS	0x064
+#define SDRC_DLLB_CTRL		0x068
+#define SDRC_DLLB_STATUS	0x06C
+#define SDRC_POWER		0x070
+#define SDRC_MR_0		0x084
+
+
+/* SDRC global register get/set */
+
+static void __attribute__((unused)) sdrc_write_reg(u32 val, u16 reg)
+{
+	pr_debug("sdrc_write_reg: writing 0x%0x to 0x%0x\n", val,
+		 (u32)OMAP_SDRC_REGADDR(reg));
+
+	__raw_writel(val, OMAP_SDRC_REGADDR(reg));
+}
+
+static u32 __attribute__((unused)) sdrc_read_reg(u16 reg)
+{
+	return __raw_readl(OMAP_SDRC_REGADDR(reg));
+}
+
+#endif