arm64: dts: armada-3720-turris-mox: remove mrvl,i2c-fast-mode

[ Upstream commit ee7ab3f263f8131722cff3871b9618b1e7478f07 ]

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@kernel.org>
Reviewed-by: Marek Behún <kabel@kernel.org>
Acked-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>

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 874bc3954c8e65729e8e8ca3215c746e3cd76ba5..025e02d23da9b09836958bbf03079a94bec4411a 100644 (file)
--- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
@@ -118,6 +118,7 @@
        pinctrl-names = "default";
        pinctrl-0 = <&i2c1_pins>;
        clock-frequency = <100000>;
+       /delete-property/ mrvl,i2c-fast-mode;
        status = "okay";
 
        rtc@6f {