| Message ID | 4d269f30b1122487a2b5c8b48e24f78f2b75a509.1570537903.git.nicolas.ferre@microchip.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | [1/2] dt-bindings: sdhci-of-at91: add the microchip,sdcal-inverted property | expand |
On Tue, 8 Oct 2019 14:34:31 +0200, Nicolas Ferre wrote: > Add the specific microchip,sdcal-inverted property to at91 sdhci > device binding. > This optional property describes how the SoC SDCAL pin is connected. > It could be handled at SiP, SoM or board level. > > This property read by at91 sdhci driver will allow to put in place a > software workaround that would reduce power consumption. > > Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> > --- > Documentation/devicetree/bindings/mmc/sdhci-atmel.txt | 5 +++++ > 1 file changed, 5 insertions(+) > Reviewed-by: Rob Herring <robh@kernel.org>
On Tue, 8 Oct 2019 at 14:34, Nicolas Ferre <nicolas.ferre@microchip.com> wrote: > > Add the specific microchip,sdcal-inverted property to at91 sdhci > device binding. > This optional property describes how the SoC SDCAL pin is connected. > It could be handled at SiP, SoM or board level. > > This property read by at91 sdhci driver will allow to put in place a > software workaround that would reduce power consumption. > > Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> Applied for next, thanks! Kind regards Uffe > --- > Documentation/devicetree/bindings/mmc/sdhci-atmel.txt | 5 +++++ > 1 file changed, 5 insertions(+) > > 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: > > -- > 2.17.1 >
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:
Add the specific microchip,sdcal-inverted property to at91 sdhci device binding. This optional property describes how the SoC SDCAL pin is connected. It could be handled at SiP, SoM or board level. This property read by at91 sdhci driver will allow to put in place a software workaround that would reduce power consumption. Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com> --- Documentation/devicetree/bindings/mmc/sdhci-atmel.txt | 5 +++++ 1 file changed, 5 insertions(+)