Re: [PATCH v2 2/7] can: m_can: Map WoL to device_set_wakeup_enable

[Andrew Lunn]

On Mon, Jul 29, 2024 at 09:41:30AM +0200, Markus Schneider-Pargmann wrote:
> In some devices the pins of the m_can module can act as a wakeup source.
> This patch helps do that by connecting the PHY_WAKE WoL option to
> device_set_wakeup_enable. By marking this device as being wakeup
> enabled, this setting can be used by platform code to decide which
> sleep or poweroff mode to use.
> 
> Also this prepares the driver for the next patch in which the pinctrl
> settings are changed depending on the desired wakeup source.
> 
> Signed-off-by: Markus Schneider-Pargmann <msp@xxxxxxxxxxxx>
> ---
>  drivers/net/can/m_can/m_can.c | 37 +++++++++++++++++++++++++++++++++++
>  1 file changed, 37 insertions(+)
> 
> diff --git a/drivers/net/can/m_can/m_can.c b/drivers/net/can/m_can/m_can.c
> index 81e05746d7d4..2e4ccf05e162 100644
> --- a/drivers/net/can/m_can/m_can.c
> +++ b/drivers/net/can/m_can/m_can.c
> @@ -2182,6 +2182,36 @@ static int m_can_set_coalesce(struct net_device *dev,
>  	return 0;
>  }
>  
> +static void m_can_get_wol(struct net_device *dev, struct ethtool_wolinfo *wol)
> +{
> +	struct m_can_classdev *cdev = netdev_priv(dev);
> +
> +	wol->supported = device_can_wakeup(cdev->dev) ? WAKE_PHY : 0;
> +	wol->wolopts = device_may_wakeup(cdev->dev) ? WAKE_PHY : 0;
> +}

It is nice to see Ethernet WoL mapped to CAN :-)

So will any activity on the CAN BUS wake the device? Or does it need
to be addresses to this device?

	Andrew