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Groups > linux.kernel > #1513916 > unrolled thread
| Started by | Zach Brown <zach.brown@ni.com> |
|---|---|
| First post | 2016-11-02 16:30 +0100 |
| Last post | 2016-11-02 16:30 +0100 |
| Articles | 1 — 1 participant |
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[PATCH v2 1/2] mmc: sdhci: dt: Add device tree properties sdhci-caps and sdhci-caps-mask Zach Brown <zach.brown@ni.com> - 2016-11-02 16:30 +0100
| From | Zach Brown <zach.brown@ni.com> |
|---|---|
| Date | 2016-11-02 16:30 +0100 |
| Subject | [PATCH v2 1/2] mmc: sdhci: dt: Add device tree properties sdhci-caps and sdhci-caps-mask |
| Message-ID | <sz5Ed-80I-9@gated-at.bofh.it> |
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> --- 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
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