[U-Boot] [PATCH] ARM: keystone: Pass SPI MTD partition table via kernel command line

[Vignesh R]

SPI U-Boot image for K2 boards have now exceeded 512K partition
allocated to it and no longer fit the partitions defined in kernel DTS
file. Therefore, pass an updated MTD partition table from U-Boot as
kernel command line arguments to avoid kernel from accidentally
modifying boot loader image that has overflowed to next user partition.

To do is, introduce a common environment file for declaring SPI
partition so that each individual boards need not repeat the same.
Choose appropriate SPI bus from board config file and pass it as command
line argument to kernel.

Signed-off-by: Vignesh R <vigneshr at ti.com>
---
 include/configs/k2e_evm.h            |  5 +++++
 include/configs/k2g_evm.h            |  3 +++
 include/configs/k2hk_evm.h           |  4 ++++
 include/configs/k2l_evm.h            |  4 ++++
 include/configs/ti_armv7_keystone2.h |  7 ++++++-
 include/environment/ti/spi.h         | 15 +++++++++++++++
 6 files changed, 37 insertions(+), 1 deletion(-)
 create mode 100644 include/environment/ti/spi.h

diff --git a/include/configs/k2e_evm.h b/include/configs/k2e_evm.h
index 777f22540afb..3abe5c3fc821 100644
--- a/include/configs/k2e_evm.h
+++ b/include/configs/k2e_evm.h
@@ -10,6 +10,8 @@
 #ifndef __CONFIG_K2E_EVM_H
 #define __CONFIG_K2E_EVM_H
 
+#include <environment/ti/spi.h>
+
 /* Platform type */
 #define CONFIG_SOC_K2E
 
@@ -30,6 +32,9 @@
 /* SPL SPI Loader Configuration */
 #define CONFIG_SPL_TEXT_BASE           0x0c100000
 
+
+#define SPI_MTD_PARTS SPI0_MTD_PARTS
+
 /* NAND Configuration */
 #define CONFIG_SYS_NAND_PAGE_2K
 
diff --git a/include/configs/k2g_evm.h b/include/configs/k2g_evm.h
index bd252312a20b..049c4dd6ec4b 100644
--- a/include/configs/k2g_evm.h
+++ b/include/configs/k2g_evm.h
@@ -10,6 +10,8 @@
 #ifndef __CONFIG_K2G_EVM_H
 #define __CONFIG_K2G_EVM_H
 
+#include <environment/ti/spi.h>
+
 /* Platform type */
 #define CONFIG_SOC_K2G
 
@@ -76,4 +78,5 @@
 #define CONFIG_BOUNCE_BUFFER
 #endif
 
+#define SPI_MTD_PARTS	SPI1_MTD_PARTS
 #endif /* __CONFIG_K2G_EVM_H */
diff --git a/include/configs/k2hk_evm.h b/include/configs/k2hk_evm.h
index 4adb119b3066..d6e6171a6731 100644
--- a/include/configs/k2hk_evm.h
+++ b/include/configs/k2hk_evm.h
@@ -10,6 +10,8 @@
 #ifndef __CONFIG_K2HK_EVM_H
 #define __CONFIG_K2HK_EVM_H
 
+#include <environment/ti/spi.h>
+
 /* Platform type */
 #define CONFIG_SOC_K2HK
 
@@ -30,6 +32,8 @@
 /* SPL SPI Loader Configuration */
 #define CONFIG_SPL_TEXT_BASE		0x0c200000
 
+#define SPI_MTD_PARTS SPI0_MTD_PARTS
+
 /* NAND Configuration */
 #define CONFIG_SYS_NAND_PAGE_2K
 
diff --git a/include/configs/k2l_evm.h b/include/configs/k2l_evm.h
index 9bdd56570be7..aaaff381665c 100644
--- a/include/configs/k2l_evm.h
+++ b/include/configs/k2l_evm.h
@@ -10,6 +10,8 @@
 #ifndef __CONFIG_K2L_EVM_H
 #define __CONFIG_K2L_EVM_H
 
+#include <environment/ti/spi.h>
+
 /* Platform type */
 #define CONFIG_SOC_K2L
 
@@ -30,6 +32,8 @@
 /* SPL SPI Loader Configuration */
 #define CONFIG_SPL_TEXT_BASE		0x0c100000
 
+#define SPI_MTD_PARTS SPI0_MTD_PARTS
+
 /* NAND Configuration */
 #define CONFIG_SYS_NAND_PAGE_4K
 
diff --git a/include/configs/ti_armv7_keystone2.h b/include/configs/ti_armv7_keystone2.h
index 5d4ef58e5f1a..c48d7ba17a2d 100644
--- a/include/configs/ti_armv7_keystone2.h
+++ b/include/configs/ti_armv7_keystone2.h
@@ -213,6 +213,10 @@
 /* EDMA3 */
 #define CONFIG_TI_EDMA3
 
+#define KERNEL_MTD_PARTS						\
+	"mtdparts="							\
+	SPI_MTD_PARTS
+
 #define DEFAULT_FW_INITRAMFS_BOOT_ENV					\
 	"name_fw_rd=k2-fw-initrd.cpio.gz\0"				\
 	"set_rd_spec=setenv rd_spec ${rdaddr}:${filesize}\0"		\
@@ -269,7 +273,8 @@
 		"sf write ${loadaddr} 0 ${filesize}\0"		\
 	"burn_uboot_nand=nand erase 0 0x100000; "			\
 		"nand write ${loadaddr} 0 ${filesize}\0"		\
-	"args_all=setenv bootargs console=ttyS0,115200n8 rootwait=1\0"	\
+	"args_all=setenv bootargs console=ttyS0,115200n8 rootwait=1 "	\
+		KERNEL_MTD_PARTS					\
 	"args_net=setenv bootargs ${bootargs} rootfstype=nfs "		\
 		"root=/dev/nfs rw nfsroot=${serverip}:${nfs_root},"	\
 		"${nfs_options} ip=dhcp\0"				\
diff --git a/include/environment/ti/spi.h b/include/environment/ti/spi.h
new file mode 100644
index 000000000000..6fea9d61f071
--- /dev/null
+++ b/include/environment/ti/spi.h
@@ -0,0 +1,15 @@
+/*
+ * Copyright (C) 2017 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Environment variable definitions for SPI on TI boards.
+ *
+ * SPDX-License-Identifier:	GPL-2.0+
+ */
+
+#ifndef __TI_SPI_H
+#define __TI_SPI_H
+
+#define SPI0_MTD_PARTS "spi0.0:1m(u-boot-spl)ro,-(misc);\0"
+#define SPI1_MTD_PARTS "spi1.0:1m(u-boot-spl)ro,-(misc);\0"
+
+#endif
-- 
2.11.0