diff options
| author | Axe Yang <axe.yang@mediatek.com> | 2023-12-07 14:35:34 +0800 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2023-12-07 15:12:36 +0100 |
| commit | ec1aaf792d9aafbe1d1ffd414c423ddc2a3d3103 (patch) | |
| tree | 28d8c25fa8ccc237784b5e1337128f77edce3870 | |
| parent | 1f30f51053715af81a25d902511079aca3fdb213 (diff) | |
dt-bindings: mmc: mtk-sd: add tuning steps related property
Add 'mediatek,tuning-steps' setting. This property will give MSDC
a chance to extend tuning steps up to 64. With more tuning steps,
MSDC may achieve a more optimal calibration result, thus avoiding
potential CRC issues.
Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Axe Yang <axe.yang@mediatek.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://lore.kernel.org/r/20231207063535.29546-2-axe.yang@mediatek.com
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/mtk-sd.yaml | 9 |
1 files changed, 9 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml index 3fffa467e4e1..c532ec92d2d9 100644 --- a/Documentation/devicetree/bindings/mmc/mtk-sd.yaml +++ b/Documentation/devicetree/bindings/mmc/mtk-sd.yaml @@ -145,6 +145,15 @@ properties: minimum: 0 maximum: 7 + mediatek,tuning-step: + $ref: /schemas/types.yaml#/definitions/uint32 + description: + Some SoCs need extend tuning step for better delay value to avoid CRC issue. + If not present, default tuning step is 32. For eMMC and SD, this can yield + satisfactory calibration results in most cases. + enum: [32, 64] + default: 32 + resets: maxItems: 1 |