i3c: master: Introduce optional Runtime PM support

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Master drivers currently manage Runtime PM individually, but all require
runtime resume for bus operations.  This can be centralized in common code.

Add optional Runtime PM support to ensure the parent device is runtime
resumed before bus operations and auto-suspended afterward.

Notably, do not call ->bus_cleanup() if runtime resume fails.  Master
drivers that opt-in to core runtime PM support must take that into account.

Also provide an option to allow IBIs and hot-joins while runtime suspended.

Signed-off-by: Adrian Hunter <adrian.hunter@intel.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Link: https://patch.msgid.link/20260113072702.16268-20-adrian.hunter@intel.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

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Adrian Hunter 2026-01-13 09:27:00 +02:00 • committed by Alexandre Belloni

parent 3c3de6803a

commit 990c149c61

4 changed files with 138 additions and 9 deletions

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46

drivers/i3c/device.c

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4

drivers/i3c/internals.h

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93

drivers/i3c/master.c

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4

include/linux/i3c/master.h

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