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Re: [MIPS] MEM_SDREFCFG is not defined for Alchemy DB1550 (compile fail)

To: Alon Bar-Lev <alon.barlev@gmail.com>
Subject: Re: [MIPS] MEM_SDREFCFG is not defined for Alchemy DB1550 (compile fail)
From: Sergei Shtylyov <sshtylyov@ru.mvista.com>
Date: Tue, 25 Dec 2007 13:41:21 +0300
Cc: linux-mips@ftp.linux-mips.org, LKML <linux-kernel@vger.kernel.org>
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Hello.

Alon Bar-Lev wrote:

When I have:
CONFIG_MIPS_DB1550
CONFIG_SOC_AU1550
CONFIG_SOC_AU1X00
CONFIG_PM

MEM_SDREFCFG is used at:
arch/mips/au1000/common/power.c::pm_do_freq()

PM code is generally broken and unmaintained, so no wonder. I don't remember if anyone has fixed CPU context restoration code (it uses a "skewed" stack frame).

While the MEM_SDREFCFG constant is declare only for CONFIG_SOC_AU1000,
CONFIG_SOC_AU1500, CONFIG_SOC_AU1100 at:
include/asm-mips/mach-au1x00/au1000.h

Maybe MEM_SDREFCFG should be defined for CONFIG_SOC_AU1X00?

I've just looked into the Au1550 datasheet and indeed it doesn't have such register; its SDDRAM controller is not compatible with older SoCs.

Or there should be #ifdef for its usage in power.c?

   Looks like you'll have to invent something... ;-)

Best Regards,
Alon Bar-Lev.

WBR, Sergei

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