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mmc: sdhci: dt: Add device tree properties sdhci-caps and sdhci-caps-mask

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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>
This commit is contained in:
Zach Brown 2016-11-02 10:26:15 -05:00 committed by Ulf Hansson
parent 49adc0cacb
commit 426ad97523
1 changed files with 13 additions and 0 deletions
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13
Documentation/devicetree/bindings/mmc/sdhci.txt Normal file
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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.