arm: Introduce arch/arm/mach-omap2 for OMAP2 derivative platforms

This moves what was in arch/arm/cpu/armv7/omap-common in to
arch/arm/mach-omap2 and moves
arch/arm/cpu/armv7/{am33xx,omap3,omap4,omap5} in to arch/arm/mach-omap2
as subdirectories.  All refernces to the former locations are updated to
the current locations.  For the logic to decide what our outputs are,
consolidate the tests into a single config.mk rather than including 4.

Signed-off-by: Tom Rini <trini@konsulko.com>

1 files changed, 57 insertions, 0 deletions

diff --git a/arch/arm/mach-omap2/omap3/spl_id_nand.c b/arch/arm/mach-omap2/omap3/spl_id_nand.c
new file mode 100644
index 0000000000..0e2f0a2f6d
--- /dev/null
+++ b/arch/arm/mach-omap2/omap3/spl_id_nand.c
@@ -0,0 +1,57 @@
+/*
+ * (C) Copyright 2011
+ * Texas Instruments, <www.ti.com>
+ *
+ * Author :
+ *     Tom Rini <trini@ti.com>
+ *
+ * Initial Code from:
+ *     Richard Woodruff <r-woodruff2@ti.com>
+ *     Jian Zhang <jzhang@ti.com>
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#include <common.h>
+#include <jffs2/load_kernel.h>
+#include <linux/mtd/nand.h>
+#include <linux/mtd/omap_gpmc.h>
+#include <asm/io.h>
+#include <asm/arch/sys_proto.h>
+#include <asm/arch/mem.h>
+
+/*
+ * Many boards will want to know the results of the NAND_CMD_READID command
+ * in order to decide what to do about DDR initialization.  This function
+ * allows us to do that very early and to pass those results back to the
+ * board so it can make whatever decisions need to be made.
+ */
+int identify_nand_chip(int *mfr, int *id)
+{
+	int loops = 1000;
+
+	/* Make sure that we have setup GPMC for NAND correctly. */
+	set_gpmc_cs0(MTD_DEV_TYPE_NAND);
+
+	sdelay(2000);
+
+	/* Issue a RESET and then READID */
+	writeb(NAND_CMD_RESET, &gpmc_cfg->cs[0].nand_cmd);
+	writeb(NAND_CMD_STATUS, &gpmc_cfg->cs[0].nand_cmd);
+	while ((readl(&gpmc_cfg->cs[0].nand_dat) & NAND_STATUS_READY)
+	                                        != NAND_STATUS_READY) {
+		sdelay(100);
+		if (--loops == 0)
+			return 1;
+	}
+	writeb(NAND_CMD_READID, &gpmc_cfg->cs[0].nand_cmd);
+
+	/* Set the address to read to 0x0 */
+	writeb(0x0, &gpmc_cfg->cs[0].nand_adr);
+
+	/* Read off the manufacturer and device id. */
+	*mfr = readb(&gpmc_cfg->cs[0].nand_dat);
+	*id = readb(&gpmc_cfg->cs[0].nand_dat);
+
+	return 0;
+}