diff options
| author | Adrian Hunter <adrian.hunter@intel.com> | 2016-02-09 16:12:37 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-02-11 11:39:56 +0100 |
| commit | 163cbe31e5163459908a41a2b4e0d33a28fd557a (patch) | |
| tree | 35f00899cd4dbc2e5e01879ecc6901e5538f0dff /drivers/char/misc.c | |
| parent | 8d28b7a72fe18bcdcdb047243ba8fec36b149955 (diff) | |
mmc: sdhci-pci: Fix card detect race for Intel BXT/APL
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>
Cc: stable@vger.kernel.org # v4.4+
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/char/misc.c')
0 files changed, 0 insertions, 0 deletions