i3c: renesas: Perform Dynamic Address Assignment on resume

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The Renesas RZ/G3S SoC supports a power saving mode where power to most
SoC components, including I3C, is turned off.

On systems where the I3C devices also loses power during suspend (e.g. NXP
P3T1085UK-ARD connected to the PMOD1_6A connector of the RZ SMARC Carrier
2 + Renesas RZ/G3S SMARC SOM), the devices becomes unreachable after
resume.

Running DAA in the controller resume path restores communication. However,
DAA relies on interrupts for TX/RX, which are not available in the noirq
suspend/resume phase (unless they are wakeup interrupts). For this, the
suspend/resume callbacks were moved out of the noirq phase. Currently,
there is no identified use case on either the Renesas RZ/G3S or Renesas
RZ/G3E SoCs that requires the controller suspend/resume hooks to be part of
the noirq suspend/resume phase.

Since renesas_i3c_reset() is not called anymore in atomic context
update it to use read_poll_timeout().

Along with this, struct renesas_i3c::DATBASn and its usage were removed,
as they are no longer needed.

Fixes: e721898631 ("i3c: renesas: Add suspend/resume support")
Cc: stable@vger.kernel.org
Signed-off-by: Claudiu Beznea <claudiu.beznea.uj@bp.renesas.com>
Reviewed-by: Frank Li <Frank.Li@nxp.com>
Tested-by: Tommaso Merciai <tommaso.merciai.xr@bp.renesas.com>
Link: https://patch.msgid.link/20260713130545.568657-7-claudiu.beznea+renesas@tuxon.dev
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>

...

This commit is contained in:

Claudiu Beznea 2026-07-13 16:05:34 +03:00 • committed by Alexandre Belloni

parent 27cf0ad162

commit fbf26154c4

1 changed files with 15 additions and 23 deletions

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drivers/i3c/master/renesas-i3c.c

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