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On R-Car Gen3 using PSCI, s2ram powers down the SoC. After resume, the CAN interface no longer works, until it is brought down and up again. Fix this by calling rcar_can_start() from the PM resume callback, to fully initialize the controller instead of just restarting it. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://patch.msgid.link/699b2f7fcb60b31b6f976a37f08ce99c5ffccb31.1755165227.git.geert+renesas@glider.be Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>