From: Frieder Schrempf frieder.schrempf@kontron.de
commit ca6f9d85d5944046a241b325700c1ca395651c28 upstream.
The MCP2515 can be used with an SPI clock of up to 10 MHz. Set the limit accordingly to prevent any performance issues caused by the really low clock speed of 100 kHz.
This removes the arbitrarily low limit on the SPI frequency, that was caused by a typo in the original dts.
Without this change, receiving CAN messages on the board beyond a certain bitrate will cause overrun errors (see 'ip -det -stat link show can0').
With this fix, receiving messages on the bus works without any overrun errors for bitrates up to 1 MBit.
Fixes: 8668d8b2e67f ("arm64: dts: Add the Kontron i.MX8M Mini SoMs and baseboards") Cc: stable@vger.kernel.org Signed-off-by: Frieder Schrempf frieder.schrempf@kontron.de Signed-off-by: Shawn Guo shawnguo@kernel.org Signed-off-by: Greg Kroah-Hartman gregkh@linuxfoundation.org --- arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)
--- a/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts +++ b/arch/arm64/boot/dts/freescale/imx8mm-kontron-n801x-s.dts @@ -97,7 +97,7 @@ clocks = <&osc_can>; interrupt-parent = <&gpio4>; interrupts = <28 IRQ_TYPE_EDGE_FALLING>; - spi-max-frequency = <100000>; + spi-max-frequency = <10000000>; vdd-supply = <®_vdd_3v3>; xceiver-supply = <®_vdd_5v>; };