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>

diff --git a/arch/arm/mach-omap2/sdrc.h b/arch/arm/mach-omap2/sdrc.h
new file mode 100644 (file)
index 0000000..e105997
--- /dev/null
+++ b/arch/arm/mach-omap2/sdrc.h
@@ -0,0 +1,49 @@
+#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