From: Haibo Chen <haibo.chen@xxxxxxx>
Add a new fsl,sdio-async-interrupt-enabled binding for sdio devices
which enable the async interrupt function. When get this property,
driver will avoid to use DAT[1] for hardware auto tuning check.
Signed-off-by: Haibo Chen <haibo.chen@xxxxxxx>
---
.../devicetree/bindings/mmc/fsl-imx-esdhc.yaml | 10 ++++++++++
1 file changed, 10 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
index b5baf439fbac..8a9f1775b0e2 100644
--- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
+++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml
@@ -122,6 +122,16 @@ properties:
- const: state_200mhz
- const: sleep
+ fsl,sdio-async-interrupt-enabled:
+ description: |
+ Recommend for SDIO cards that enables SDIO async interrupt for SDR104 and SDR50
+ operating modes. SDIO async interrupt uses DAT[1] to signal the card's interrupt.
+ uSDHC tuning mechanism must use DAT[0] and CMD signals to avoid a possible
+ conflict and incorrect delay line calculated by the uSDHC auto tuning mechanism.
+ Enabling this device tree property is only recommended for layouts that are
+ matching the SD interface length.
+ type: boolean
+
required:
- compatible
- reg
--
2.17.1
