i3c: master: Add inline i3c_readl_fifo() and i3c_writel_fifo()

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The I3C abstraction expects u8 buffers, but some controllers operate with
a 32-bit bus width FIFO and cannot flag valid bytes individually. To avoid
reading or writing outside the buffer bounds, use 32-bit accesses where
possible and apply memcpy for any remaining bytes

Signed-off-by: Jorge Marques <jorge.marques@analog.com>
Suggested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Tested-by: Wolfram Sang <wsa+renesas@sang-engineering.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://lore.kernel.org/r/20250624-i3c-writesl-readsl-v3-1-63ccf0870f01@analog.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

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Jorge Marques 2025-06-24 11:06:04 +02:00 • committed by Alexandre Belloni

parent 12aa3e0cb0

commit 733b439375

1 changed files with 37 additions and 0 deletions

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drivers/i3c/internals.h

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