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.br...@ni.com> --- Documentation/devicetree/bindings/mmc/sdhci.txt | 14 ++++++++++++++ 1 file changed, 14 insertions(+) create mode 100644 Documentation/devicetree/bindings/mmc/sdhci.txt diff --git a/Documentation/devicetree/bindings/mmc/sdhci.txt b/Documentation/devicetree/bindings/mmc/sdhci.txt new file mode 100644 index 0000000..0f4f1bb --- /dev/null +++ b/Documentation/devicetree/bindings/mmc/sdhci.txt @@ -0,0 +1,14 @@ +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. + -- 2.7.4
