diff options
| author | Haibo Chen <haibo.chen@nxp.com> | 2021-08-16 18:57:08 +0800 |
|---|---|---|
| committer | Dong Aisheng <aisheng.dong@nxp.com> | 2021-11-02 17:12:52 +0800 |
| commit | 3fe02605d28ee14ab3c3a2afef3ee2ad71cda9aa (patch) | |
| tree | f19138a3701f42f24358f1b1bc3ba33adfa4bd85 /Documentation/devicetree/bindings/mmc | |
| parent | 3bac0112da54783bbe303426d3ec33a27cfa93e0 (diff) | |
dt-bindings: mmc: fsl-imx-esdhc: add fsl,sdio-async-interrupt-enabled binding
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@nxp.com>
Diffstat (limited to 'Documentation/devicetree/bindings/mmc')
| -rw-r--r-- | Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml | 10 |
1 files changed, 10 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml index a3412f221104..85a10052b248 100644 --- a/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml +++ b/Documentation/devicetree/bindings/mmc/fsl-imx-esdhc.yaml @@ -128,6 +128,16 @@ properties: - const: default - 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 |