diff options
| author | Zach Brown <zach.brown@ni.com> | 2016-09-16 10:01:42 -0500 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2016-09-26 21:31:34 +0200 |
| commit | 3794c542641f1a7a329f31c87927e2c5f5417670 (patch) | |
| tree | 73506f6e5606ea39ee945a0a3092fcf252d60743 /drivers/mmc/host/sdhci.h | |
| parent | ae0c12cc4e4b0405ffd48368f742ba0d5a01f7f1 (diff) | |
mmc: sdhci-of-arasan: Set controller to test mode when no CD bit
The sdhci controller on xilinx zynq devices will not function unless
the CD bit is provided. http://www.xilinx.com/support/answers/61064.html
In cases where it is impossible to provide the CD bit in hardware,
setting the controller to test mode and then setting inserted to true
will get the controller to function without the CD bit.
When the device has the property xlnx,fails-without-test-cd the driver
changes the controller to test mode and sets test inserted to true to
make the controller function.
Signed-off-by: Zach Brown <zach.brown@ni.com>
Acked-by: Adrian Hunter <adrian.hunter@intel.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc/host/sdhci.h')
| -rw-r--r-- | drivers/mmc/host/sdhci.h | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/mmc/host/sdhci.h b/drivers/mmc/host/sdhci.h index a2bc9e111a3a..c722cd23205c 100644 --- a/drivers/mmc/host/sdhci.h +++ b/drivers/mmc/host/sdhci.h @@ -84,6 +84,8 @@ #define SDHCI_CTRL_ADMA32 0x10 #define SDHCI_CTRL_ADMA64 0x18 #define SDHCI_CTRL_8BITBUS 0x20 +#define SDHCI_CTRL_CDTEST_INS 0x40 +#define SDHCI_CTRL_CDTEST_EN 0x80 #define SDHCI_POWER_CONTROL 0x29 #define SDHCI_POWER_ON 0x01 |