[PATCH AUTOSEL 5.8 074/132] can: flexcan: disable clocks during stop mode

Sasha Levin
2020-10-26T23:54:09Z

From: Joakim Zhang <qiangqing.zhang@nxp.com>

[ Upstream commit 02f71c6605e1f8259c07f16178330db766189a74 ]

Disable clocks while CAN core is in stop mode.

Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Tested-by: Sean Nyekjaer <sean@geanix.com>
Link: https://lore.kernel.org/r/20191210085721.9853-2-qiangqing.zhang@nxp.com
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/net/can/flexcan.c | 30 ++++++++++++++++++++----------
1 file changed, 20 insertions(+), 10 deletions(-)

diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c
index 94d10ec954a05..de7599d99b4b5 100644
--- a/drivers/net/can/flexcan.c
+++ b/drivers/net/can/flexcan.c
@@ -1700,8 +1700,6 @@ static int __maybe_unused flexcan_suspend(struct device *device)
err = flexcan_chip_disable(priv);
if (err)
return err;
-
- err = pm_runtime_force_suspend(device);
}
netif_stop_queue(dev);
netif_device_detach(dev);
@@ -1727,10 +1725,6 @@ static int __maybe_unused flexcan_resume(struct device *device)
if (err)
return err;
} else {
- err = pm_runtime_force_resume(device);
- if (err)
- return err;
-
err = flexcan_chip_enable(priv);
}
}
@@ -1761,8 +1755,16 @@ static int __maybe_unused flexcan_noirq_suspend(struct device *device)
struct net_device *dev = dev_get_drvdata(device);
struct flexcan_priv *priv = netdev_priv(dev);

- if (netif_running(dev) && device_may_wakeup(device))
- flexcan_enable_wakeup_irq(priv, true);
+ if (netif_running(dev)) {
+ int err;
+
+ if (device_may_wakeup(device))
+ flexcan_enable_wakeup_irq(priv, true);
+
+ err = pm_runtime_force_suspend(device);
+ if (err)
+ return err;
+ }

return 0;
}
@@ -1772,8 +1774,16 @@ static int __maybe_unused flexcan_noirq_resume(struct device *device)
struct net_device *dev = dev_get_drvdata(device);
struct flexcan_priv *priv = netdev_priv(dev);

- if (netif_running(dev) && device_may_wakeup(device))
- flexcan_enable_wakeup_irq(priv, false);
+ if (netif_running(dev)) {
+ int err;
+
+ err = pm_runtime_force_resume(device);
+ if (err)
+ return err;
+
+ if (device_may_wakeup(device))
+ flexcan_enable_wakeup_irq(priv, false);
+ }

return 0;
}
--
2.25.1