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Diffstat (limited to 'Documentation/devicetree/bindings/mmc/sdhci-atmel.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/sdhci-atmel.txt | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt b/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt index 1b662d7171a0..503c6dbac1b2 100644 --- a/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt +++ b/Documentation/devicetree/bindings/mmc/sdhci-atmel.txt @@ -9,6 +9,11 @@ Required properties: - clocks: Phandlers to the clocks. - clock-names: Must be "hclock", "multclk", "baseclk"; +Optional properties: +- microchip,sdcal-inverted: when present, polarity on the SDCAL SoC pin is + inverted. The default polarity for this signal is described in the datasheet. + For instance on SAMA5D2, the pin is usually tied to the GND with a resistor + and a capacitor (see "SDMMC I/O Calibration" chapter). Example: |