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| author | Joakim Zhang <qiangqing.zhang@nxp.com> | 2021-02-18 14:00:35 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2021-03-17 18:10:13 +0300 |
| commit | 679f002ce370e943a3911901cc3d101c6f63bde8 (patch) | |
| tree | 266768ba6977c63b6ba302c59f8da10d7a2f5c8b /drivers/net/can/flexcan.c | |
| parent | fa2cdf772770bee1f47ed5b20b5f7ba418f57872 (diff) | |
| download | linux-679f002ce370e943a3911901cc3d101c6f63bde8.tar.xz | |
can: flexcan: assert FRZ bit in flexcan_chip_freeze()
commit 449052cfebf624b670faa040245d3feed770d22f upstream.
Assert HALT bit to enter freeze mode, there is a premise that FRZ bit is
asserted. This patch asserts FRZ bit in flexcan_chip_freeze, although
the reset value is 1b'1. This is a prepare patch, later patch will
invoke flexcan_chip_freeze() to enter freeze mode, which polling freeze
mode acknowledge.
Fixes: b1aa1c7a2165b ("can: flexcan: fix transition from and to freeze mode in chip_{,un}freeze")
Link: https://lore.kernel.org/r/20210218110037.16591-2-qiangqing.zhang@nxp.com
Signed-off-by: Joakim Zhang <qiangqing.zhang@nxp.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/net/can/flexcan.c')
| -rw-r--r-- | drivers/net/can/flexcan.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/net/can/flexcan.c b/drivers/net/can/flexcan.c index 6b866d0451b2..66aef0a575ef 100644 --- a/drivers/net/can/flexcan.c +++ b/drivers/net/can/flexcan.c @@ -383,7 +383,7 @@ static int flexcan_chip_freeze(struct flexcan_priv *priv) u32 reg; reg = flexcan_read(®s->mcr); - reg |= FLEXCAN_MCR_HALT; + reg |= FLEXCAN_MCR_FRZ | FLEXCAN_MCR_HALT; flexcan_write(reg, ®s->mcr); while (timeout-- && !(flexcan_read(®s->mcr) & FLEXCAN_MCR_FRZ_ACK)) |