can: flexcan: poll MCR_LPM_ACK instead of GPR ACK for stop mode acknowledgment

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Stop Mode is entered when Stop Mode is requested at chip level and
MCR[LPM_ACK] is asserted by the FlexCAN.

Double check with IP owner, the MCR[LPM_ACK] bit should be polled for
stop mode acknowledgment, not the acknowledgment from chip level which
is used to gate flexcan clocks.

This patch depends on:

    b7603d080f ("can: flexcan: add low power enter/exit acknowledgment helper")

Fixes: 5f186c257f (can: flexcan: fix stop mode acknowledgment)
Tested-by: Sean Nyekjaer <sean@geanix.com>
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Cc: linux-stable <stable@vger.kernel.org> # >= v5.0
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>

...

This commit is contained in:

Joakim Zhang 2019-12-04 11:36:14 +00:00 • committed by Marc Kleine-Budde

parent b7603d080f

commit 048e3a34a2

1 changed files with 2 additions and 15 deletions

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17

drivers/net/can/flexcan.c

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