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authorZach Brown <zach.brown@ni.com>2016-11-02 10:26:15 -0500
committerMarcel Ziswiler <marcel.ziswiler@toradex.com>2018-09-27 19:20:07 +0200
commitd254c8e1de658c0e2739247bfc3c1f9eaf74cdf3 (patch)
tree3a967d5493229ae5de998602cb306f182b974aa3
parent8c722ff150552ad13fc41d0a9c045d298a65d449 (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)
-rw-r--r--Documentation/devicetree/bindings/mmc/sdhci.txt13
1 files changed, 13 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/sdhci.txt b/Documentation/devicetree/bindings/mmc/sdhci.txt
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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.