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docs/sdio: add reference to card initialization flowchart

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This update enhances the SDIO documentation by including a reference to the card initialization flowchart in the MMC/SD physical layer specification. This addition aims to provide implementers with a clearer understanding of the complete card initialization and command sequence.

Signed-off-by: Arjav Patel <arjav1528@gmail.com>
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Arjav Patel 2026-03-17 21:42:43 +05:30 • committed by Alan C. Assis
parent dacdb77010
commit 3d14873faa
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4
Documentation/components/drivers/special/sdio.rst
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@ -53,6 +53,10 @@ lower-half, a simplified interaction around CMD9 looks like this:
3. ``SDIO_RECVR2``: Retrieve the 136-bit response and provide the
decoded 128-bit CID/CSD payload to the MMCSD upper-half.
For the complete card initialization and command sequence, refer to the
card initialization flowchart in the MMC/SD physical layer
specification.
R2 (136-bit) response and CSD/CID
---------------------------------