[Intel-gfx] cerryview sd card problem

[Westerberg, Mika]

On Mon, Sep 26, 2016 at 11:57:04AM +0300, Jani Nikula wrote:
> On Wed, 21 Sep 2016, Giacomo Comes <comes at naic.edu> wrote:
> > Hi,
> > I hope this is the appropriate place to ask what follows.
> > If not please point me to the right place.
> >
> > I have a couple of cerryview systems
> > (Acer Aspire R11 and Intel compute stick STK1AW32SC) on which
> > I run linux (openSUSE 42.1) with a 4.7 kernel.
> >
> > I have a problem though with the sd card reader:
> > in normal condition the kernel does not see the card reader.
> > The modules pinctrl-cherryview.ko and sdhci-pci.ko are both 
> > loaded but the sd device is missing.
> >
> > Following the suggestion found here:
> > https://bugzilla.opensuse.org/show_bug.cgi?id=954532#c24
> > I "fixed" the problem by adding the module pinctrl-cherryview
> > in the initrd.
> >
> > I was wondering if the necessity to put pinctrl-cherryview in
> > the initrd is due to a bug in the kernel driver or it is a distro
> > issue.
> 
> Hi Giacomo, intel-gfx is about Intel *graphics*. We are mostly clueless
> about SD cards here. ;)
> 
> Mika, Andy, could you point Giacomo to the right place please?

If the SD-card card detection is implemented as a GPIO, the GPIO/pinctrl
driver needs to be there before the SD-card driver is able to detect a
card being inserted.