Hi Pali,
> Some SFP modules are not detected when i2c-fast-mode is enabled even when
> clock-frequency is already set to 100000. The I2C bus violates the timing
> specifications when run in fast mode. So disable fast mode on Turris Mox.
>
> Same change was already applied for uDPU (also Armada 3720 board with SFP)
> in commit fe3ec631a77d ("arm64: dts: uDPU: remove i2c-fast-mode").
>
> Fixes: 7109d817db2e ("arm64: dts: marvell: add DTS for Turris Mox")
> Signed-off-by: Pali Rohár <pali@xxxxxxxxxx>
> Reviewed-by: Marek Behún <kabel@xxxxxxxxxx>
Applied on mvebu/fixes
Thanks,
Gregory
> ---
> arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> index 6bcc319a0161..85f15f2a4740 100644
> --- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> +++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
> @@ -119,6 +119,7 @@
> pinctrl-names = "default";
> pinctrl-0 = <&i2c1_pins>;
> clock-frequency = <100000>;
> + /delete-property/ mrvl,i2c-fast-mode;
> status = "okay";
>
> rtc@6f {
> --
> 2.20.1
>
--
Gregory Clement, Bootlin
Embedded Linux and Kernel engineering
http://bootlin.com
