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Date: Sat, 19 Sep 2009 00:29:40 +0800
Message-ID: <8abf57fa0909180929j418f9fb7t80a4f707b2fce4e1@mail.gmail.com>
Subject: Re: Powerpc Kernel 2.6.26.5 boot panic when call cfi_probe_chip()
From: g r1x <gr1xmail@gmail.com>
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2009/9/18 g r1x <gr1xmail@gmail.com>

> I'm working on a 440GX demo board with a flash chip s29gl256p(128k sector
> size, 32M total, CFI). I have tried 2 ways to add mtd partiton to the
> kernel, but failed with kernel panic. (kernel version: 2.6.26.5)
>
 S29GL256p is pin strapped as a 16bit width
so in dts, I wrote:
bank-width = <2>;
device-width = <1>;

In OF driver:
#define CFG_FLASH_BUS_WIDTH     2
struct map_info s29gl_map = {
        .name = "Nor Flash on Cerberus",
        .size = CFG_FLASH_SIZE,
        .bankwidth = CFG_FLASH_BUS_WIDTH,
};

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<div class=3D"gmail_quote">2009/9/18 g r1x <span dir=3D"ltr">&lt;<a href=3D=
"mailto:gr1xmail@gmail.com">gr1xmail@gmail.com</a>&gt;</span><br><blockquot=
e class=3D"gmail_quote" style=3D"margin:0 0 0 .8ex;border-left:1px #ccc sol=
id;padding-left:1ex;">
I&#39;m working on a 440GX demo board with a flash chip s29gl256p(128k sect=
or size, 32M total, CFI). I have tried 2 ways to add mtd partiton to the ke=
rnel, but failed with kernel panic. (kernel version: 2.6.26.5)<div><span cl=
ass=3D"Apple-style-span" style=3D"white-space: pre; ">	</span></div>
</blockquote><div>=A0S29GL256p is pin strapped as a 16bit width</div><div>s=
o in dts, I wrote:</div><div><span class=3D"Apple-style-span" style=3D"font=
-family: arial, sans-serif; font-size: 13px; border-collapse: collapse; "><=
div>
<span style=3D"white-space: pre; ">					</span>bank-width =3D &lt;2&gt;;</d=
iv><div><span style=3D"white-space: pre; ">					</span>device-width =3D &lt=
;1&gt;;</div><div><br></div><div>In OF driver:</div><div>#define CFG_FLASH_=
BUS_WIDTH =A0 =A0 2</div>
<div><div>struct map_info s29gl_map =3D {</div><div>=A0=A0 =A0 =A0 =A0.name=
 =3D &quot;Nor Flash on Cerberus&quot;,</div><div>=A0=A0 =A0 =A0 =A0.size =
=3D CFG_FLASH_SIZE,</div><div>=A0=A0 =A0 =A0 =A0.bankwidth =3D CFG_FLASH_BU=
S_WIDTH,</div><div>};</div><div><br>
</div></div></span></div></div>

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