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authorFrank Li <Frank.Li@nxp.com>2023-12-01 17:25:29 -0500
committerAlexandre Belloni <alexandre.belloni@bootlin.com>2024-01-08 00:49:20 +0100
commite5e3df06ac98d15cfb10bb5c12356709365e91b2 (patch)
treec2a250068d976402f95a9af2cc1062e085846d70 /drivers/i3c/master
parent05b26c31a4859af9e75b7de77458e99358364fe1 (diff)
i3c: add actual_len in i3c_priv_xfer
In MIPI I3C Specification: "Ninth Bit of SDR Target Returned (Read) Data as End-of-Data: In I2C, the ninth Data bit from Target to Controller is an ACK by the Controller. By contrast, in I3C this bit allows the Target to end a Read, and allows the Controller to Abort a Read. In SDR terms, the ninth bit of Read data is referred to as the T-Bit (for ‘Transition’)" I3C allow devices early terminate data transfer. So need "actual_len" field to indicate how much get by i3c_priv_xfer. Reviewed-by: Miquel Raynal <miquel.raynal@bootlin.com> Signed-off-by: Frank Li <Frank.Li@nxp.com> Link: https://lore.kernel.org/r/20231201222532.2431484-4-Frank.Li@nxp.com Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
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