Messages in this thread Patch in this message | | | From | Yann Gautier <> | Subject | [PATCH 1/3] dt-bindings: mmc: mmci: add a property to disable DMA LLI | Date | Fri, 4 Mar 2022 14:51:32 +0100 |
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On STMicroelectronics variant of PL18x, the DMA Linked Lists are supported starting from revision v2 of the peripheral. But it has limitations, as all the buffers should be aligned on block size (except the last one). But this cannot be guaranteed with SDIO. We should then have a property to disable the support of LLI.
Signed-off-by: Yann Gautier <yann.gautier@foss.st.com> --- Documentation/devicetree/bindings/mmc/arm,pl18x.yaml | 5 +++++ 1 file changed, 5 insertions(+)
diff --git a/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml b/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml index 1e69a5a42439..309a2c0426e5 100644 --- a/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml +++ b/Documentation/devicetree/bindings/mmc/arm,pl18x.yaml @@ -145,6 +145,11 @@ properties: driver to sample the receive data (for example with a voltage switch transceiver). + st,disable-dma-lli: + $ref: /schemas/types.yaml#/definitions/flag + description: ST Micro-specific property, disable DMA linked lists. + It is used for SDIO. + st,cmd-gpios: maxItems: 1 description: -- 2.25.1
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