diff options
author | Jeroen Hofstee <jhofstee@victronenergy.com> | 2019-09-24 18:45:52 +0000 |
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committer | Marc Kleine-Budde <mkl@pengutronix.de> | 2019-11-04 21:47:22 +0100 |
commit | 59f415c2f5e20a6859e49626e8af4de983ff111c (patch) | |
tree | 4a09b0bee2fa45fdaf30c5e020b8641ac65ed9dc /sound/atmel/Makefile | |
parent | c4409e9fbea954fdae7927205283dfc3ed8e2d6e (diff) |
can: ti_hecc: ti_hecc_stop(): stop the CPK on down
When the interface goes down, the CPK should no longer take an active
part in the CAN-bus communication, like sending acks and error frames.
So enable configuration mode in ti_hecc_stop, so the CPK is no longer
active.
When a transceiver switch is present the acks and errors don't make it
to the bus, but disabling the CPK then does prevent oddities, like
ti_hecc_reset() failing, since the CPK can become bus-off and starts
counting the 11 bit recessive bits, which seems to block the reset. It
can also cause invalid interrupts and disrupt the CAN-bus, since
transmission can be stopped in the middle of a message, by disabling the
tranceiver while the CPK is sending.
Since the CPK is disabled after normal power on, it is typically only
seen when the interface is restarted.
Signed-off-by: Jeroen Hofstee <jhofstee@victronenergy.com>
Signed-off-by: Marc Kleine-Budde <mkl@pengutronix.de>
Diffstat (limited to 'sound/atmel/Makefile')
0 files changed, 0 insertions, 0 deletions