diff mbox series

[1/2] dt-bindings: sdhci-of-at91: add the microchip,sdcal-inverted property

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

Commit Message

Nicolas Ferre Oct. 8, 2019, 12:34 p.m. UTC
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(+)

Comments

Rob Herring (Arm) Oct. 15, 2019, 10:25 p.m. UTC | #1
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>
Ulf Hansson Oct. 18, 2019, 10:58 a.m. UTC | #2
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 mbox series

Patch

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: