On Wed, May 26, 2021 at 05:20:45PM +0200, Marc Kleine-Budde wrote:
> On 26.05.2021 13:47:42, Torin Cooper-Bennun wrote:
> > TCAN4550 shutdown is attempted by setting the device into standby mode.
> > There is probably a better way, but I understand we are limited by being
> > in the ISR context.
>
> Not exactly. The tcan's ISR runs in a threaded context, so you can
> basically do normal SPI or regmap transactions, shut down clocks and
> regulators, etc...
Got you. I keep forgetting that detail!
Would it be sufficient to change the CAN state as follows?
| if (handled == IRQ_HANDLED) {
| netdev_err(cdev->net,
| "Device is disabled by driver.\n");
|
| cdev->can.state = CAN_STATE_STOPPED;
|
| err = regmap_update_bits(priv->regmap, TCAN4X5X_CONFIG,
| TCAN4X5X_MODE_SEL_MASK,
| TCAN4X5X_MODE_STANDBY);
| if (err)
| goto exit_regmap_failure;
| }
--
Regards,
Torin Cooper-Bennun
Software Engineer | maxiluxsystems.com
Attachment:
signature.asc
Description: PGP signature
