[U-Boot] [PATCH V4 5/6] imx: mx6sabresd/sabreauto runtime setting fdt_file

[Peng Fan]

Detect the SOC and board variant at runtime and change the dtb name,
but not hardcoding the fdt_file env variable.

Take the following patch as a reference.
Íd58699b157df75f1aa0b363ea9c21add21a0c
"mx6cuboxi: Load the correct 'fdtfile' variable"

Signed-off-by: Peng Fan <Peng.Fan at freescale.com>
Reviewed-by: Fabio Estevam <fabio.estevam at freescale.com>
---

Changes v4:
 Add Fabio's Reviewed-by
Changes v3:
 New patch
Changes v2:
 none

 board/freescale/mx6qsabreauto/mx6qsabreauto.c |  9 +++++++++
 board/freescale/mx6sabresd/mx6sabresd.c       | 10 ++++++++++
 include/configs/mx6qsabreauto.h               |  5 -----
 include/configs/mx6sabre_common.h             | 21 +++++++++++++++++++--
 include/configs/mx6sabresd.h                  |  5 -----
 5 files changed, 38 insertions(+), 12 deletions(-)

diff --git a/board/freescale/mx6qsabreauto/mx6qsabreauto.c b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
index b76e4eb..943a4bd 100644
--- a/board/freescale/mx6qsabreauto/mx6qsabreauto.c
+++ b/board/freescale/mx6qsabreauto/mx6qsabreauto.c
@@ -522,6 +522,15 @@ int board_late_init(void)
 	add_board_boot_modes(board_boot_modes);
 #endif
 
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+	setenv("board_name", "SABREAUTO");
+
+	if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D))
+		setenv("board_rev", "MX6Q");
+	else if (is_cpu_type(MXC_CPU_MX6DL) || is_cpu_type(MXC_CPU_MX6SOLO))
+		setenv("board_rev", "MX6DL");
+#endif
+
 	return 0;
 }
 
diff --git a/board/freescale/mx6sabresd/mx6sabresd.c b/board/freescale/mx6sabresd/mx6sabresd.c
index 23f8f6b..4f0694a 100644
--- a/board/freescale/mx6sabresd/mx6sabresd.c
+++ b/board/freescale/mx6sabresd/mx6sabresd.c
@@ -679,6 +679,16 @@ int board_late_init(void)
 #ifdef CONFIG_CMD_BMODE
 	add_board_boot_modes(board_boot_modes);
 #endif
+
+#ifdef CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+	setenv("board_name", "SABRESD");
+
+	if (is_cpu_type(MXC_CPU_MX6Q) || is_cpu_type(MXC_CPU_MX6D))
+		setenv("board_rev", "MX6Q");
+	else if (is_cpu_type(MXC_CPU_MX6DL) || is_cpu_type(MXC_CPU_MX6SOLO))
+		setenv("board_rev", "MX6DL");
+#endif
+
 	return 0;
 }
 
diff --git a/include/configs/mx6qsabreauto.h b/include/configs/mx6qsabreauto.h
index 2260344..11cf538 100644
--- a/include/configs/mx6qsabreauto.h
+++ b/include/configs/mx6qsabreauto.h
@@ -12,11 +12,6 @@
 #define CONFIG_MACH_TYPE	3529
 #define CONFIG_MXC_UART_BASE	UART4_BASE
 #define CONFIG_CONSOLE_DEV		"ttymxc3"
-#if defined CONFIG_MX6Q
-#define CONFIG_DEFAULT_FDT_FILE	"imx6q-sabreauto.dtb"
-#elif defined CONFIG_MX6DL
-#define CONFIG_DEFAULT_FDT_FILE	"imx6dl-sabreauto.dtb"
-#endif
 #define CONFIG_MMCROOT			"/dev/mmcblk0p2"
 #define PHYS_SDRAM_SIZE		(2u * 1024 * 1024 * 1024)
 
diff --git a/include/configs/mx6sabre_common.h b/include/configs/mx6sabre_common.h
index c8c9f81..397ad7b 100644
--- a/include/configs/mx6sabre_common.h
+++ b/include/configs/mx6sabre_common.h
@@ -76,10 +76,12 @@
 #define EMMC_ENV ""
 #endif
 
+#define CONFIG_ENV_VARS_UBOOT_RUNTIME_CONFIG
+
 #define CONFIG_EXTRA_ENV_SETTINGS \
 	"script=boot.scr\0" \
 	"image=zImage\0" \
-	"fdt_file=" CONFIG_DEFAULT_FDT_FILE "\0" \
+	"fdt_file=undefined\0" \
 	"fdt_addr=0x18000000\0" \
 	"boot_fdt=try\0" \
 	"ip_dyn=yes\0" \
@@ -149,9 +151,24 @@
 			"fi; " \
 		"else " \
 			"bootz; " \
-		"fi;\0"
+		"fi;\0" \
+		"findfdt="\
+			"if test $fdt_file = undefined; then " \
+				"if test $board_name = SABREAUTO && test $board_rev = MX6Q; then " \
+					"setenv fdt_file imx6q-sabreauto.dtb; fi; " \
+				"if test $board_name = SABREAUTO && test $board_rev = MX6DL; then " \
+					"setenv fdt_file imx6dl-sabreauto.dtb; fi; " \
+				"if test $board_name = SABRESD && test $board_rev = MX6Q; then " \
+					"setenv fdt_file imx6q-sabresd.dtb; fi; " \
+				"if test $board_name = SABRESD && test $board_rev = MX6DL; then " \
+					"setenv fdt_file imx6dl-sabresd.dtb; fi; " \
+				"if test $fdt_file = undefined; then " \
+					"echo WARNING: Could not determine dtb to use; fi; " \
+			"fi;\0" \
+
 
 #define CONFIG_BOOTCOMMAND \
+	"run findfdt;" \
 	"mmc dev ${mmcdev};" \
 	"if mmc rescan; then " \
 		"if run loadbootscript; then " \
diff --git a/include/configs/mx6sabresd.h b/include/configs/mx6sabresd.h
index 41162ca..5f635ca 100644
--- a/include/configs/mx6sabresd.h
+++ b/include/configs/mx6sabresd.h
@@ -19,11 +19,6 @@
 #define CONFIG_MXC_UART_BASE	UART1_BASE
 #define CONFIG_CONSOLE_DEV		"ttymxc0"
 #define CONFIG_MMCROOT			"/dev/mmcblk1p2"
-#if defined(CONFIG_MX6Q)
-#define CONFIG_DEFAULT_FDT_FILE	"imx6q-sabresd.dtb"
-#elif defined(CONFIG_MX6DL)
-#define CONFIG_DEFAULT_FDT_FILE	"imx6dl-sabresd.dtb"
-#endif
 #define PHYS_SDRAM_SIZE		(1u * 1024 * 1024 * 1024)
 
 #define CONFIG_SUPPORT_EMMC_BOOT /* eMMC specific */
-- 
1.8.4