[U-Boot] [PATCH] imx: Define common routines to set cpu and board environment variables

[Eric Nelson]

These can be used in bootcmd to produce DTB file names.

set_board_env() allows over-ride for use when a developing custom
DTB files. Both are declared __weak to allow complete override by 
a board.
        
Signed-off-by: Eric Nelson <eric.nelson at boundarydevices.com>
---

I'm feeling like I missed something here. Routines in imx-common/cpu.c
are shared between various i.MX processors, but there doesn't appear
to be a common header file.

It seems that arch/arm/include/asm/imx-common.h should be present
but isn't. Am I missing something?

I also think there should be a way we could pull this into multiple
boards without adding a full-up board_late_init() function into
each board file, but tracing the init sequence, I'm not seeing an
architecture-specific spot after env_init.

 arch/arm/imx-common/cpu.c                 | 15 +++++++++++++--
 arch/arm/include/asm/arch-mx6/sys_proto.h |  9 +++++++++
 2 files changed, 22 insertions(+), 2 deletions(-)

diff --git a/arch/arm/imx-common/cpu.c b/arch/arm/imx-common/cpu.c
index 0cd2538..5e13c43 100644
--- a/arch/arm/imx-common/cpu.c
+++ b/arch/arm/imx-common/cpu.c
@@ -99,8 +99,6 @@ unsigned imx_ddr_size(void)
 }
 #endif
 
-#if defined(CONFIG_DISPLAY_CPUINFO)
-
 const char *get_imx_type(u32 imxtype)
 {
 	switch (imxtype) {
@@ -121,6 +119,19 @@ const char *get_imx_type(u32 imxtype)
 	}
 }
 
+void __weak set_cpu_env()
+{
+	setenv("cpu",get_imx_type(cpu_type(get_cpu_rev())));
+}
+
+void __weak set_board_env()
+{
+	char *old = getenv("board");
+	if (!old)
+		setenv("board", CONFIG_SYS_BOARD);
+}
+
+#if defined(CONFIG_DISPLAY_CPUINFO)
 int print_cpuinfo(void)
 {
 	u32 cpurev;
diff --git a/arch/arm/include/asm/arch-mx6/sys_proto.h b/arch/arm/include/asm/arch-mx6/sys_proto.h
index 8c21364..6d9b1f2 100644
--- a/arch/arm/include/asm/arch-mx6/sys_proto.h
+++ b/arch/arm/include/asm/arch-mx6/sys_proto.h
@@ -27,8 +27,17 @@ u32 get_cpu_rev(void);
 #define is_cpu_type(cpu) (cpu_type(get_cpu_rev()) == cpu)
 
 const char *get_imx_type(u32 imxtype);
+
 unsigned imx_ddr_size(void);
 
+/* Set standard board and cpu environment variables.
+ * for use in loading DTB files.
+ *
+ * Call these in board_late_init if needed
+ */
+void set_cpu_env();
+void set_board_env();
+
 void set_vddsoc(u32 mv);
 
 /*
-- 
1.8.1.2