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| author | Haibo Chen <haibo.chen@nxp.com> | 2025-03-14 19:01:45 +0800 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2025-03-28 21:59:00 +0100 |
| commit | 0bd1486e4bb38d2a892077765286d7e62cc9a073 (patch) | |
| tree | 8c9b8d27f37c026a8f7973120932ae4b6103c9a4 | |
| parent | 06ffbb4d9864ed1c8ad0bde986a9248cb6f4d248 (diff) | |
| download | linux-0bd1486e4bb38d2a892077765286d7e62cc9a073.tar.gz linux-0bd1486e4bb38d2a892077765286d7e62cc9a073.tar.bz2 linux-0bd1486e4bb38d2a892077765286d7e62cc9a073.zip | |
can: flexcan: disable transceiver during system PM
commit 5a19143124be42900b3fbc9ada3c919632eb45eb upstream.
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 <frank.li@nxp.com>
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://patch.msgid.link/20250314110145.899179-2-haibo.chen@nxp.com
[mkl: add newlines]
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
| -rw-r--r-- | drivers/net/can/flexcan/flexcan-core.c | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/drivers/net/can/flexcan/flexcan-core.c b/drivers/net/can/flexcan/flexcan-core.c index 0e7704c41801..c25ecf608335 100644 --- a/drivers/net/can/flexcan/flexcan-core.c +++ b/drivers/net/can/flexcan/flexcan-core.c @@ -2230,6 +2230,10 @@ 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; @@ -2262,10 +2266,16 @@ 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); } |