Re: [PATCH net 1/4] can: m_can: pci: fix incorrect reference clock rate

From: Jarkko Nikula
Date: Tue Nov 16 2021 - 09:51:25 EST

On 11/16/21 9:15 AM, Marc Kleine-Budde wrote:
On 16.11.2021 09:11:40, Jarkko Nikula wrote:
ip link set can0 type can bitrate 1000000 dbitrate 2000000 fd on

I got confirmation the clock to CAN controller is indeed changed from 100
MHz to 200 MHz in release HW & firmware.

I haven't upgraded the FW in a while on our HW so that perhaps explain
why I was seeing expected rate :-)

Can we query the FW version in the driver and set the clock rate

Perhaps or check some clock register. I guess for now it can be considered fixed clock since I understood rate was changed before released to customers. I.e. customers shouldn't have firmware with different rates. At least I hope so :-)