Re: [PATCH] arm: Fix DEBUG_LL for omap zoom2/3

Tony Lindgren
2010-03-20T00:46:17Z

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* Tony Lindgren <tony@atomide.com> [100319 17:30]:
> Hi all,
>
> Got a zoom3 finally! This is needed to boot with DEBUG_LL + earlyprintk.

And of course it won't compile because of a missing #.
Here's the working version.

Tony

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>From d1d25009c085a2ea677da6bc2c905fbcf98e224e Mon Sep 17 00:00:00 2001
From: Tony Lindgren <tony@atomide.com>
Date: Fri, 19 Mar 2010 17:18:45 -0700
Subject: [PATCH] arm: Fix DEBUG_LL for omap zoom2/3

Zoom2 and 3 have UARTs only on the external debug board.
GPMC needs to be mapped early to use it for DEBUG_LL.

Note that with the pending serial.c patches you need to
set console=ttyS0,115200n8 as it will be the only UART
mapped. To use DEBUG_LL, you need to pass also earlyprintk
in cmdline.

Cc: Allen Pais <allen.pais@ti.com>
Cc: Vikram Pandita <vikram.pandita@ti.com>
Signed-off-by: Tony Lindgren <tony@atomide.com>

diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index eb62bf9..355e87d 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S
@@ -328,6 +328,15 @@ __create_page_tables:
add r0, r4, #0xd8000000 >> 18
str r3, [r0]
#endif
+#if defined(CONFIG_MACH_OMAP_ZOOM2) || defined(CONFIG_MACH_OMAP_ZOOM3)
+ /*
+ * Zoom2 and Zoom3 have UARTs only on the debug board.
+ * The debug board is connected to the GPMC.
+ */
+ add r0, r4, #0xfb000000 >> 18
+ orr r3, r7, #0x10000000
+ str r3, [r0]
+#endif
#endif
mov pc, lr
ENDPROC(__create_page_tables)