diff options
| author | Zach Brown <zach.brown@ni.com> | 2016-11-02 10:26:15 -0500 |
|---|---|---|
| committer | Marcel Ziswiler <marcel.ziswiler@toradex.com> | 2018-12-24 01:27:34 +0100 |
| commit | 4e9e2ef9f92573b8a8775b8bf1b23bc8d3b38c4d (patch) | |
| tree | 5bc0049d93abd6c15f6394cbc4e30eaaae87fb7e /Documentation/devicetree | |
| parent | 4315d90c5cd56918ba0f589f29fe866ad536dcf4 (diff) | |
mmc: sdhci: dt: Add device tree properties sdhci-caps and sdhci-caps-mask
On some systems the sdhci capabilty register is incorrect for one
reason or another.
The sdhci-caps-mask property specifies which bits in the register
are incorrect and should be turned off before using sdhci-caps to turn
on bits.
The sdhci-caps property specifies which bits should be turned on.
Signed-off-by: Zach Brown <zach.brown@ni.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
(cherry picked from commit 426ad975237e880c5ecdc1b74f0a4c34b93d3e14)
Diffstat (limited to 'Documentation/devicetree')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/sdhci.txt | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/sdhci.txt b/Documentation/devicetree/bindings/mmc/sdhci.txt new file mode 100644 index 000000000000..1c95a1a555c3 --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci.txt @@ -0,0 +1,13 @@ +The properties specific for SD host controllers. For properties shared by MMC +host controllers refer to the mmc[1] bindings. + + [1] Documentation/devicetree/bindings/mmc/mmc.txt + +Optional properties: +- sdhci-caps-mask: The sdhci capabilities register is incorrect. This 64bit + property corresponds to the bits in the sdhci capabilty register. If the bit + is on in the mask then the bit is incorrect in the register and should be + turned off, before applying sdhci-caps. +- sdhci-caps: The sdhci capabilities register is incorrect. This 64bit + property corresponds to the bits in the sdhci capability register. If the + bit is on in the property then the bit should be turned on. |