diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-02-09 16:12:38 +0200 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2016-03-03 15:07:15 -0800 |
| commit | 43919d0ca15d5e93efd40467c63502b33b7acf5c (patch) | |
| tree | 2e3aab89fb4315b9886bebc00cb01907dd96d3d5 /drivers/mmc/host/pxamci.c | |
| parent | 2bfda88879216667b7f60d91851606f165244b0a (diff) | |
mmc: sdhci-acpi: Fix card detect race for Intel BXT/APL
commit 6a645dd87a5a506779810d7d9935c25fc2ef4687 upstream.
Intel BXT/APL use a card detect GPIO however the host controller
will not enable bus power unless it's card detect also reflects
the presence of a card. Unfortunately those 2 things race which
can result in commands not starting, after which the controller
does nothing and there is a 10 second wait for the driver's
10-second timer to timeout.
That is fixed by having the driver look also at the present state
register to determine if the card is present. Consequently, provide
a 'get_cd' mmc host operation for BXT/APL that does that.
Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/mmc/host/pxamci.c')
0 files changed, 0 insertions, 0 deletions