[PATCH] am335x, guardian: mem: Add board dependent mem values

[Gireesh.Hiremath at in.bosch.com]

From: Moses Christopher <BollavarapuMoses.Christopher at in.bosch.com>

  - Add mem-guardian.h derived from am33xx/mem.h

    * Add GPMC config values optimized for Bosch Guardian Board
    * NAND Chip used by Bosch Guardian Board is Micron MT29F4G08ABBFA

Signed-off-by: Moses Christopher <BollavarapuMoses.Christopher at in.bosch.com>
---
 .../include/asm/arch-am33xx/mem-guardian.h    | 63 +++++++++++++++++++
 arch/arm/mach-omap2/am33xx/board.c            |  4 ++
 arch/arm/mach-omap2/mem-common.c              |  4 ++
 board/bosch/guardian/board.c                  |  2 +-
 4 files changed, 72 insertions(+), 1 deletion(-)
 create mode 100644 arch/arm/include/asm/arch-am33xx/mem-guardian.h

diff --git a/arch/arm/include/asm/arch-am33xx/mem-guardian.h b/arch/arm/include/asm/arch-am33xx/mem-guardian.h
new file mode 100644
index 0000000000..e864a0fd36
--- /dev/null
+++ b/arch/arm/include/asm/arch-am33xx/mem-guardian.h
@@ -0,0 +1,63 @@
+/* SPDX-License-Identifier: GPL-2.0+ */
+/*
+ * (C) Copyright 2006-2008
+ * Texas Instruments, <www.ti.com>
+ *
+ * (C) Copyright 2020
+ * Robert Bosch Power Tools GmbH
+ *
+ * Author
+ *		Moses Christopher <BollavarapuMoses.Christopher at in.bosch.com>
+ *
+ * Copied from:
+ *		arch/arm/include/asm/arch-am33xx/mem.h
+ *
+ * Initial Code from:
+ *		Mansoor Ahamed <mansoor.ahamed at ti.com>
+ *		Richard Woodruff <r-woodruff2 at ti.com>
+ */
+
+#ifndef _MEM_GUARDIAN_H_
+#define _MEM_GUARDIAN_H_
+
+/*
+ * GPMC settings -
+ * Definitions is as per the following format
+ * #define <PART>_GPMC_CONFIG<x> <value>
+ * Where:
+ * PART is the part name e.g. M_NAND - Micron Nand Flash
+ * x is GPMC config registers from 1 to 7 (there will be 7 macros)
+ * Value is corresponding value
+ *
+ * For every valid PRCM configuration there should be only one definition of
+ * the same.
+ *
+ * The following values are optimized for improving the NAND Read speed
+ * They are applicable and tested for Bosch Guardian Board.
+ * Read Speeds rose from 1.5MiBs to over 7.6MiBs
+ *
+ * Currently valid part Names are (PART):
+ * M_NAND - Micron NAND
+ */
+#define GPMC_SIZE_256M		0x0
+#define GPMC_SIZE_128M		0x8
+#define GPMC_SIZE_64M		0xC
+#define GPMC_SIZE_32M		0xE
+#define GPMC_SIZE_16M		0xF
+
+#define M_NAND_GPMC_CONFIG1	0x00000800
+#define M_NAND_GPMC_CONFIG2	0x00030300
+#define M_NAND_GPMC_CONFIG3	0x00030300
+#define M_NAND_GPMC_CONFIG4	0x02000201
+#define M_NAND_GPMC_CONFIG5	0x00030303
+#define M_NAND_GPMC_CONFIG6	0x000000C0
+#define M_NAND_GPMC_CONFIG7	0x00000008
+
+/* max number of GPMC Chip Selects */
+#define GPMC_MAX_CS		8
+/* max number of GPMC regs */
+#define GPMC_MAX_REG		7
+
+#define DBG_MPDB		6
+
+#endif /* endif _MEM_GUARDIAN_H_ */
diff --git a/arch/arm/mach-omap2/am33xx/board.c b/arch/arm/mach-omap2/am33xx/board.c
index 2888390d24..a87ecaf12a 100644
--- a/arch/arm/mach-omap2/am33xx/board.c
+++ b/arch/arm/mach-omap2/am33xx/board.c
@@ -23,7 +23,11 @@
 #include <asm/arch/clock.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/i2c.h>
+#if IS_ENABLED(CONFIG_TARGET_AM335X_GUARDIAN)
+#include <asm/arch/mem-guardian.h>
+#else
 #include <asm/arch/mem.h>
+#endif
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/sys_proto.h>
 #include <asm/io.h>
diff --git a/arch/arm/mach-omap2/mem-common.c b/arch/arm/mach-omap2/mem-common.c
index 50d5f3e9eb..2dcf0cf9c3 100644
--- a/arch/arm/mach-omap2/mem-common.c
+++ b/arch/arm/mach-omap2/mem-common.c
@@ -15,7 +15,11 @@
 #include <common.h>
 #include <asm/io.h>
 #include <asm/arch/cpu.h>
+#if IS_ENABLED(CONFIG_TARGET_AM335X_GUARDIAN)
+#include <asm/arch/mem-guardian.h>
+#else
 #include <asm/arch/mem.h>
+#endif
 #include <asm/arch/sys_proto.h>
 #include <command.h>
 #include <linux/mtd/omap_gpmc.h>
diff --git a/board/bosch/guardian/board.c b/board/bosch/guardian/board.c
index 1d8fa78154..8b3c82cafd 100644
--- a/board/bosch/guardian/board.c
+++ b/board/bosch/guardian/board.c
@@ -28,7 +28,7 @@
 #include <asm/arch/ddr_defs.h>
 #include <asm/arch/gpio.h>
 #include <asm/arch/hardware.h>
-#include <asm/arch/mem.h>
+#include <asm/arch/mem-guardian.h>
 #include <asm/arch/mmc_host_def.h>
 #include <asm/arch/omap.h>
 #include <asm/arch/sys_proto.h>
-- 
2.20.1