lkml.org 
[lkml]   [2009]   [Jul]   [30]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: MMC: Make the configuration memory resource optional
Guennadi Liakhovetski wrote:

> While you're at it, please, consider swapping the two lines in
> tmio_mmc_probe():
>
> - tmio_mmc_clk_stop(host);
> reset(host);
> + tmio_mmc_clk_stop(host);
>
> Otherwise, I think, reset causes problems trying to access the controller
> with disabled clock. At least this is needed on SuperH.

Interesting. I'll see what the result of this is on TMIO - This sequence
was garnered from the WinCE driver for the chip.

I cant see _why_ this should be a problem, as this disables the card
clock, not HCLK. Could you debug further in tmio_mmc_clk_stop() please
and see if reordering only one of the two IO accesses cures this?

Let me know what you find out.

-Ian


\
 
 \ /
  Last update: 2009-07-30 21:23    [W:0.081 / U:0.444 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site