Similar to ar71xx, detect only once and cache the strings in
/tmp/sysinfo/model and /tmp/sysinfo/boardname.

Signed-off-by: Daniel Golle <dgo...@allnet.de>

diff --git a/target/linux/ramips/base-files/lib/preinit/03_preinit_do_ramips.sh 
b/target/linux/ramips/base-files/lib/preinit/03_preinit_do_ramips.sh
index e76418d..31ef5f8 100644
--- a/target/linux/ramips/base-files/lib/preinit/03_preinit_do_ramips.sh
+++ b/target/linux/ramips/base-files/lib/preinit/03_preinit_do_ramips.sh
@@ -2,6 +2,8 @@
 
 do_ramips() {
        . /lib/ramips.sh
+
+       ramips_board_detect
 }
 
 boot_hook_add preinit_main do_ramips
diff --git a/target/linux/ramips/base-files/lib/ramips.sh 
b/target/linux/ramips/base-files/lib/ramips.sh
index 8ca3bfb..4687856 100755
--- a/target/linux/ramips/base-files/lib/ramips.sh
+++ b/target/linux/ramips/base-files/lib/ramips.sh
@@ -1,9 +1,13 @@
 #!/bin/sh
 #
-# Copyright (C) 2010 OpenWrt.org
+# Copyright (C) 2010-2013 OpenWrt.org
 #
 
-ramips_board_name() {
+RAMIPS_BOARD_NAME=
+RAMIPS_MODEL=
+
+
+ramips_board_detect() {
        local machine
        local name
 
@@ -189,5 +193,20 @@ ramips_board_name() {
                ;;
        esac
 
-       echo $name
+       [ -z "$RAMIPS_BOARD_NAME" ] && RAMIPS_BOARD_NAME="$name"
+       [ -z "$RAMIPS_MODEL" ] && RAMIPS_MODEL="$machine"
+
+       [ -e "/tmp/sysinfo/" ] || mkdir -p "/tmp/sysinfo/"
+
+       echo "$RAMIPS_BOARD_NAME" > /tmp/sysinfo/board_name
+       echo "$RAMIPS_MODEL" > /tmp/sysinfo/model
+}
+
+ramips_board_name() {
+       local name
+
+       [ -f /tmp/sysinfo/board_name ] && name=$(cat /tmp/sysinfo/board_name)
+       [ -z "$name" ] && name="unknown"
+
+       echo "$name"
 }
-- 
1.7.2.5

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