[U-Boot] [Drivers PATCH 19/19] arm/boards: Define a new config option CONFIG_BOOT_PARAMS_P

[Vipin Kumar]

A lot of ARM boards are using board_init routine just to initialize boot_params
variable in the global data structure.

This patch lets the board config files to define a CONFIG_BOOT_PARAMS_P option
which is assigned to gd->bd->bi_boot_params automatically

Consequently, many board_init routines would not be required in the respective
board directories and a weak definition becomes necessary before their removal
from the code.

Signed-off-by: Vipin Kumar <vipin.kumar at st.com>
---
 README               |  6 ++++++
 arch/arm/lib/board.c | 12 ++++++++++++
 2 files changed, 18 insertions(+)

diff --git a/README b/README
index 69da2b8..444663d 100644
--- a/README
+++ b/README
@@ -550,6 +550,12 @@ The following options need to be configured:
 		in a single configuration file and the machine type is
 		runtime discoverable, do not have to use this setting.
 
+		CONFIG_BOOT_PARAMS_P		[relevant for ARM only]
+
+		This config option can provide a way to initialize
+		bi_boot_params from the u-boot infrastructure itself. The
+		board still has the option to override it in board_init routine
+
 - 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 92cad9a..fa161b8 100644
--- a/arch/arm/lib/board.c
+++ b/arch/arm/lib/board.c
@@ -399,6 +399,11 @@ void board_init_f(ulong bootflag)
 	gd->bd->bi_arch_number = CONFIG_MACH_TYPE; /* board id for Linux */
 #endif
 
+#ifdef CONFIG_BOOT_PARAMS_P
+	/* Boot params passed to Linux */
+	gd->bd->bi_boot_params = CONFIG_BOOT_PARAMS_P;
+#endif
+
 	addr_sp -= sizeof (gd_t);
 	id = (gd_t *) addr_sp;
 	debug("Reserving %zu Bytes for Global Data at: %08lx\n",
@@ -468,6 +473,13 @@ void board_init_f(ulong bootflag)
 static char *failed = "*** failed ***\n";
 #endif
 
+static int __def_board_init(bd_t *bis)
+{
+	return -1;
+}
+
+int board_init(void) __attribute__((weak, alias("__def_board_init")));
+
 /*
  ************************************************************************
  *
-- 
1.7.11.4