Re: [PATCH 21/38] mmc: sdhci: hack up driver to make it more compliant with UHS-1

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



On Fri, Apr 25, 2014 at 02:15:30PM +0100, Russell King - ARM Linux wrote:
> On Fri, Apr 25, 2014 at 03:08:49PM +0200, Markus Pargmann wrote:
> > I just tried the different parts of the patch. Without the following
> > change, emmc works:
> > 
> > --- a/drivers/mmc/host/sdhci.c
> > +++ b/drivers/mmc/host/sdhci.c
> > @@ -1507,12 +1507,6 @@ static void sdhci_do_set_ios(struct sdhci_host *host, struct mmc_ios *ios)
> >  			host->ops->set_clock(host, host->clock);
> >  		}
> >  
> > -
> > -		/* Reset SD Clock Enable */
> > -		clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
> > -		clk &= ~SDHCI_CLOCK_CARD_EN;
> > -		sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
> > -
> 
> So the bit which stops us violating the SD spec stops eMMC from working...
> that's... just great.
> 
> Okay, I'll look deeper at this and see what can be done, but I suspect it
> will turn out to require more patches and be more invasive.

In the mean time, here's the remainder (to patch 33) of the series with
this commit omitted.

-- 
FTTC broadband for 0.8mile line: now at 9.7Mbps down 460kbps up... slowly
improving, and getting towards what was expected from it.
--
To unsubscribe from this list: send the line "unsubscribe linux-mmc" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html




[Index of Archives]     [Linux USB Devel]     [Linux Media]     [Video for Linux]     [Linux Audio Users]     [Yosemite News]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux