From: Anatolij Gustschin <agust@denx.de>
To: neorf3k <neorf3k@gmail.com>
Cc: Linux Ppc Dev List Dev List <linuxppc-dev@lists.ozlabs.org>
Subject: Re: Problem reading and programming memory location...
Date: Wed, 13 Nov 2013 08:32:59 +0100 [thread overview]
Message-ID: <20131113083259.1b69ed18@crub> (raw)
In-Reply-To: <985685C7-0122-4D45-96D1-4412E9774A5D@gmail.com>
On Tue, 12 Nov 2013 20:23:20 +0100
neorf3k <neorf3k@gmail.com> wrote:
> we have tried to read and program an 8bit register with 32bit address.
> we have mapped it with: ioremap, kmalloc etc=E2=80=A6 and then using: out=
b,
> iowrite8 etc.. but when we write to it, the value doesn=E2=80=99t change=
=E2=80=A6
> with other memory location is ok.
> That is an 8 bit register, located at 0x10020000 in a mpc5200b
> architecture. we are using kernel 2.6.33.=20
> what could be?
0x10020000 is not in the internal register memory map, so it
is probably a device on the LocalPlus bus. Did you configure
the chip select parameters for this device and did you enable
the associated chip select?
=20
HTH,
Anatolij
next prev parent reply other threads:[~2013-11-13 7:33 UTC|newest]
Thread overview: 12+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-11-12 19:23 Problem reading and programming memory location neorf3k
2013-11-13 7:32 ` Anatolij Gustschin [this message]
2013-11-13 13:48 ` neorf3k
2013-11-13 18:06 ` Anatolij Gustschin
2013-11-14 8:38 ` neorf3k
[not found] ` <20131114100917.31f674d7@crub>
2013-11-14 9:49 ` neorf3k
2013-11-15 16:27 ` neorf3k
2013-11-16 14:29 ` Anatolij Gustschin
2013-11-16 15:11 ` neorf3k
2013-11-19 10:20 ` neorf3k
2013-11-19 21:45 ` Anatolij Gustschin
2013-11-26 18:29 ` neorf3k
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