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dt-bindings: mmc: mtk-sd: Add hs400 dly3 setting

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Add hs400 dly3 setting for mtk-sd yaml

Signed-off-by: Wenbin Mei <wenbin.mei@mediatek.com>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20210917124803.22871-2-wenbin.mei@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
This commit is contained in:
Wenbin Mei
2021-09-17 20:48:01 +08:00
committed by Ulf Hansson
parent bc9fd32c29
commit fb4708e6cb
1 changed files with 12 additions and 0 deletions
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12
Documentation/devicetree/bindings/mmc/mtk-sd.yaml
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@@ -119,6 +119,18 @@ properties:
If present, HS400 command responses are sampled on rising edges.
If not present, HS400 command responses are sampled on falling edges.
mediatek,hs400-ds-dly3:
$ref: /schemas/types.yaml#/definitions/uint32
description:
Gear of the third delay line for DS for input data latch in data
pad macro, there are 32 stages from 0 to 31.
For different corner IC, the time is different about one step, it is
about 100ps.
The value is confirmed by doing scan and calibration to find a best
value with corner IC and it is valid only for HS400 mode.
minimum: 0
maximum: 31
mediatek,latch-ck:
$ref: /schemas/types.yaml#/definitions/uint32
description: