Add mediatek,rx-latch-latency-ns property which adjust data read
latch latency in the unit of nanoseconds.

Signed-off-by: Xiangsheng Hou <xiangsheng.hou@mediatek.com>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
---
 .../devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml         | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
index bab23f1b11fd..1e5e89a693c3 100644
--- a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
+++ b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
@@ -45,6 +45,9 @@ properties:
     description: device-tree node of the accompanying ECC engine.
     $ref: /schemas/types.yaml#/definitions/phandle
 
+  mediatek,rx-latch-latency-ns:
+    description: Data read latch latency, unit is nanoseconds.
+
 required:
   - compatible
   - reg
-- 
2.25.1

On Mon, Dec 19, 2022 at 10:40:15AM +0800, Xiangsheng Hou wrote:
> Add mediatek,rx-latch-latency-ns property which adjust data read
> latch latency in the unit of nanoseconds.
> 
> Signed-off-by: Xiangsheng Hou <xiangsheng.hou@mediatek.com>
> Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
> ---
>  .../devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml         | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
> index bab23f1b11fd..1e5e89a693c3 100644
> --- a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
> +++ b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml
> @@ -45,6 +45,9 @@ properties:
>      description: device-tree node of the accompanying ECC engine.
>      $ref: /schemas/types.yaml#/definitions/phandle
>  
> +  mediatek,rx-latch-latency-ns:
> +    description: Data read latch latency, unit is nanoseconds.

Doesn't the common 'rx-sample-delay-ns' work for you?

Rob

Hi Rob,

On Mon, 2022-12-19 at 09:38 -0600, Rob Herring wrote:
> On Mon, Dec 19, 2022 at 10:40:15AM +0800, Xiangsheng Hou wrote:
> > Add mediatek,rx-latch-latency-ns property which adjust data read
> > latch latency in the unit of nanoseconds.
> > 
> > Signed-off-by: Xiangsheng Hou <xiangsheng.hou@mediatek.com>
> > Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
> > Reviewed-by: AngeloGioacchino Del Regno <
> > angelogioacchino.delregno@collabora.com>
> > ---
> >  .../devicetree/bindings/spi/mediatek,spi-mtk-snfi.yaml         | 3
> > +++
> >  1 file changed, 3 insertions(+)
> > 
> > diff --git a/Documentation/devicetree/bindings/spi/mediatek,spi-
> > mtk-snfi.yaml b/Documentation/devicetree/bindings/spi/mediatek,spi-
> > mtk-snfi.yaml
> > index bab23f1b11fd..1e5e89a693c3 100644
> > --- a/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-
> > snfi.yaml
> > +++ b/Documentation/devicetree/bindings/spi/mediatek,spi-mtk-
> > snfi.yaml
> > @@ -45,6 +45,9 @@ properties:
> >      description: device-tree node of the accompanying ECC engine.
> >      $ref: /schemas/types.yaml#/definitions/phandle
> >  
> > +  mediatek,rx-latch-latency-ns:
> > +    description: Data read latch latency, unit is nanoseconds.
> 
> Doesn't the common 'rx-sample-delay-ns' work for you?

The driver need two timing related parameter, one for sample delay
which have been used by rx-sample-delay-ns. Another is read latency,
just introduce this private timing property since the common spi-rx-
delay-us is microsecond in unit.

Thanks
XIangsheng Hou