[U-Boot] [PATCH 1/3] arm: add CONFIG_MACH_TYPE option and documentation

[Igor Grinberg]

CONFIG_MACH_TYPE can be used to set the machine type number in the
common arm code instead of setting it in the board code.

Signed-off-by: Igor Grinberg <grinberg at compulab.co.il>
---
 README               |   12 ++++++++++++
 arch/arm/lib/board.c |    5 +++++
 2 files changed, 17 insertions(+), 0 deletions(-)

diff --git a/README b/README
index 446966d..a9ccb0a 100644
--- a/README
+++ b/README
@@ -442,6 +442,18 @@ The following options need to be configured:
 		crash. This is needed for buggy hardware (uc101) where
 		no pull down resistor is connected to the signal IDE5V_DD7.
 
+		CONFIG_MACH_TYPE		[relevant for ARM only]
+
+		This option can be used to specify the machine type number
+		as it appears in the ARM machine registry
+		(see http://www.arm.linux.org.uk/developer/machines/).
+		If this option is not defined, then your board code
+		will have to set this up like:
+		gd->bd->bi_arch_number = <mach type>;
+		Note: This option is not suitable if you have multiple
+		boards supported in a single configuration file and the
+		machine type is runtime discoverable.
+
 - vxWorks boot parameters:
 
 		bootvx constructs a valid bootline using the following
diff --git a/arch/arm/lib/board.c b/arch/arm/lib/board.c
index 169dfeb..ee77d05 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -451,6 +451,11 @@ void board_init_r (gd_t *id, ulong dest_addr)
 
 	monitor_flash_len = _end_ofs;
 	debug ("monitor flash len: %08lX\n", monitor_flash_len);
+
+#ifdef CONFIG_MACH_TYPE
+	bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
+#endif
+
 	board_init();	/* Setup chipselects */
 
 #ifdef CONFIG_SERIAL_MULTI
-- 
1.7.3.4