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ar71xx: fix board detection with newer RouterBOOT versions

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Recent RouterBOOT version (at least version 3.41 on RB911G-5HPacD)
use "Board=" kernel parameter instead of "board=" to pass the board
name to the kernel. Due to this change the board detection code is
not working on the devices shipped with the new RouterBOOT version.
Because the kernel is unable to identify these boards they become
unusable despite that they are supported by the current code.

Update the prom_init code to convert the 'Board' kernel parameter to
'board'. After this change, the board detection works also with the
new RouterBOOT versions.

Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
This commit is contained in:
Gabor Juhos 2017-12-08 23:31:55 +01:00 committed by Yousong Zhou
parent b8220883fd
commit e7b48fcfe1
2 changed files with 86 additions and 0 deletions
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43
target/linux/ar71xx/patches-4.4/702-MIPS-ath79-fixup-routerboot-board-parameter.patch Normal file
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@ -0,0 +1,43 @@
From: Gabor Juhos <juhosg@freemail.hu>
Date: Sat, 2 Dec 2017 19:15:29 +0100
Subject: [PATCH] MIPS: ath79: fix board detection with newer RouterBOOT versions
Recent RouterBOOT version (at least version 3.41 on RB911G-5HPacD)
use "Board=" kernel parameter instead of "board=" to pass the board
name to the kernel. Due to this change the board detection code is
not working on the devices shipped with the new RouterBOOT version.
Because the kernel is unable to identify these boards they become
unusable despite that they are supported by the current code.
Update the prom_init code to convert the 'Board' kernel parameter to
'board'. After this change, the board detection works also with the
new RouterBOOT versions.
Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
---
--- a/arch/mips/ath79/prom.c
+++ b/arch/mips/ath79/prom.c
@@ -104,6 +104,7 @@ static int __init ath79_prom_init_myload
void __init prom_init(void)
{
const char *env;
+ char *c;
if (ath79_prom_init_myloader())
return;
@@ -137,6 +138,15 @@ void __init prom_init(void)
}
#endif
+ /*
+ * RouterBOOT uses "Board" kernel parameter instead of "board" since
+ * version 3.41 (or so). Replace the first character of the parameter
+ * to keep board detection working.
+ */
+ c = strstr(arcs_cmdline, "Board=");
+ if (c)
+ c[0] = 'b';
+
if (strstr(arcs_cmdline, "board=750Gr3") ||
strstr(arcs_cmdline, "board=750i") ||
strstr(arcs_cmdline, "board=750-hb") ||

43
target/linux/ar71xx/patches-4.9/702-MIPS-ath79-fixup-routerboot-board-parameter.patch Normal file
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@ -0,0 +1,43 @@
From: Gabor Juhos <juhosg@freemail.hu>
Date: Sat, 2 Dec 2017 19:15:29 +0100
Subject: [PATCH] MIPS: ath79: fix board detection with newer RouterBOOT versions
Recent RouterBOOT version (at least version 3.41 on RB911G-5HPacD)
use "Board=" kernel parameter instead of "board=" to pass the board
name to the kernel. Due to this change the board detection code is
not working on the devices shipped with the new RouterBOOT version.
Because the kernel is unable to identify these boards they become
unusable despite that they are supported by the current code.
Update the prom_init code to convert the 'Board' kernel parameter to
'board'. After this change, the board detection works also with the
new RouterBOOT versions.
Signed-off-by: Gabor Juhos <juhosg@freemail.hu>
---
--- a/arch/mips/ath79/prom.c
+++ b/arch/mips/ath79/prom.c
@@ -104,6 +104,7 @@ static int __init ath79_prom_init_myload
void __init prom_init(void)
{
const char *env;
+ char *c;
if (ath79_prom_init_myloader())
return;
@@ -137,6 +138,15 @@ void __init prom_init(void)
}
#endif
+ /*
+ * RouterBOOT uses "Board" kernel parameter instead of "board" since
+ * version 3.41 (or so). Replace the first character of the parameter
+ * to keep board detection working.
+ */
+ c = strstr(arcs_cmdline, "Board=");
+ if (c)
+ c[0] = 'b';
+
if (strstr(arcs_cmdline, "board=750Gr3") ||
strstr(arcs_cmdline, "board=750i") ||
strstr(arcs_cmdline, "board=750-hb") ||