From: Haibo Chen Date: Fri, 14 Mar 2025 11:01:45 +0000 (+0800) Subject: can: flexcan: disable transceiver during system PM X-Git-Tag: v6.14~16^2~17^2^2 X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=5a19143124be42900b3fbc9ada3c919632eb45eb;p=thirdparty%2Fkernel%2Flinux.git can: flexcan: disable transceiver during system PM During system PM, if no wakeup requirement, disable transceiver to save power. Fixes: 4de349e786a3 ("can: flexcan: fix resume function") Cc: stable@vger.kernel.org Reviewed-by: Frank Li Signed-off-by: Haibo Chen Link: https://patch.msgid.link/20250314110145.899179-2-haibo.chen@nxp.com [mkl: add newlines] Signed-off-by: Marc Kleine-Budde --- diff --git a/drivers/net/can/flexcan/flexcan-core.c b/drivers/net/can/flexcan/flexcan-core.c index 3a71fd2357222..b080740bcb104 100644 --- a/drivers/net/can/flexcan/flexcan-core.c +++ b/drivers/net/can/flexcan/flexcan-core.c @@ -2260,6 +2260,10 @@ static int __maybe_unused flexcan_suspend(struct device *device) flexcan_chip_interrupts_disable(dev); + err = flexcan_transceiver_disable(priv); + if (err) + return err; + err = pinctrl_pm_select_sleep_state(device); if (err) return err; @@ -2292,10 +2296,16 @@ static int __maybe_unused flexcan_resume(struct device *device) if (err) return err; - err = flexcan_chip_start(dev); + err = flexcan_transceiver_enable(priv); if (err) return err; + err = flexcan_chip_start(dev); + if (err) { + flexcan_transceiver_disable(priv); + return err; + } + flexcan_chip_interrupts_enable(dev); }