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| author | Lucas Stach <dev@lynxeye.de> | 2021-05-10 21:03:58 +0200 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2021-06-14 13:57:38 +0200 |
| commit | 4d895de3505f7eb9734f679a340c976f8949ab43 (patch) | |
| tree | 6d8a7f97cfcc2b2fee091fd59cc6bf924e2fc7a8 | |
| parent | mmc: core: Add support for cache ctrl for SD cards (diff) | |
| download | linux-4d895de3505f7eb9734f679a340c976f8949ab43.tar.xz linux-4d895de3505f7eb9734f679a340c976f8949ab43.zip | |
dt-bindings: mmc: add no-mmc-hs400 flag
HS400 requires a data strobe line in addition to the usual MMC signal
lines. If a board design neglects to wire up this signal, HS400 mode is
not available, even if both the controller and the eMMC are claiming to
support this mode. Add a DT flag to allow boards to disable the HS400
support in this case.
Signed-off-by: Lucas Stach <dev@lynxeye.de>
Acked-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20210510190400.105162-1-l.stach@pengutronix.de
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/mmc-controller.yaml | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml index e141330c1114..ac80d09df3a9 100644 --- a/Documentation/devicetree/bindings/mmc/mmc-controller.yaml +++ b/Documentation/devicetree/bindings/mmc/mmc-controller.yaml @@ -220,6 +220,11 @@ properties: description: eMMC HS400 enhanced strobe mode is supported + no-mmc-hs400: + $ref: /schemas/types.yaml#/definitions/flag + description: + All eMMC HS400 modes are not supported. + dsr: description: Value the card Driver Stage Register (DSR) should be programmed |