| Message ID | 20231124070839.12484-3-axe.yang@mediatek.com |
|---|---|
| State | New |
| Headers | show |
| Series | mmc: mediatek: add support for complete clock cycle tuning | expand |
diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml index 3fffa467e4e1..c33301e2ea33 100644 --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml @@ -145,6 +145,14 @@ properties: minimum: 0 maximum: 7 + mediatek,tune-64-steps: + $ref: /schemas/types.yaml#/definitions/flag + description: + Some Soc need enable 64-steps tuning for better delay value to avoid CRC issue. + If present, tune 64 steps to cover a complete clock cycle. + If not present, tune only 32 steps. For eMMC and SD, this can also yield + satisfactory calibration results in most cases. + resets: maxItems: 1
Add 'mediatek,tune-64-steps' option. This property will give MSDC a chance to achieve a more optimal calibration result, thus avoiding potential CRC issues. Signed-off-by: Axe Yang <axe.yang@mediatek.com> --- Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 8 ++++++++ 1 file changed, 8 insertions(+)