From: Matthias Schiffer matthias.schiffer@ew.tq-group.com
When testing the CAN controller on our Ekhart Lake hardware, we determined that all communication was running with twice the configured bitrate. Changing the reference clock rate from 100MHz to 200MHz fixed this. Intel's support has confirmed to us that 200MHz is indeed the correct clock rate.
Fixes: cab7ffc0324f ("can: m_can: add PCI glue driver for Intel Elkhart Lake") Link: https://lore.kernel.org/all/c9cf3995f45c363e432b3ae8eb1275e54f009fc8.1636967... Cc: stable@vger.kernel.org Signed-off-by: Matthias Schiffer matthias.schiffer@ew.tq-group.com Acked-by: Jarkko Nikula jarkko.nikula@linux.intel.com Reviewed-by: Jarkko Nikula jarkko.nikula@linux.intel.com Signed-off-by: Marc Kleine-Budde mkl@pengutronix.de --- drivers/net/can/m_can/m_can_pci.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/drivers/net/can/m_can/m_can_pci.c b/drivers/net/can/m_can/m_can_pci.c index d72c294ac4d3..8f184a852a0a 100644 --- a/drivers/net/can/m_can/m_can_pci.c +++ b/drivers/net/can/m_can/m_can_pci.c @@ -18,7 +18,7 @@
#define M_CAN_PCI_MMIO_BAR 0
-#define M_CAN_CLOCK_FREQ_EHL 100000000 +#define M_CAN_CLOCK_FREQ_EHL 200000000 #define CTL_CSR_INT_CTL_OFFSET 0x508
struct m_can_pci_priv {