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Subject[PATCH net 1/4] can: m_can: pci: fix incorrect reference clock rate
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")
Signed-off-by: Matthias Schiffer <>
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 89cc3d41e952..d3c030a13cbe 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 {
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