ARM: dts: armada388-clearfog: increase speed of i2c0 to 400kHz

All the devices on I2C0 support fast mode, so increase the bus speed
to match.  The Armada 388 is known to have a timing issue when in
standard mode, which we believe causes the ficticious device at 0x64
to appear.

[gregory.clement@bootlin.com: Note that since the commit fbffee74986c
("ARM: dts: Fix I2C repeated start issue on Armada-38x") in 4.14, the
timing issue is managed for the Armada 38x SoCs.]

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>

diff --git a/arch/arm/boot/dts/armada-388-clearfog.dtsi b/arch/arm/boot/dts/armada-388-clearfog.dtsi
index 68acfc9..0e3b1f1 100644 (file)
--- a/arch/arm/boot/dts/armada-388-clearfog.dtsi
+++ b/arch/arm/boot/dts/armada-388-clearfog.dtsi
@@ -143,8 +143,7 @@
 };
 
 &i2c0 {
-       /* Is there anything on this? */
-       clock-frequency = <100000>;
+       clock-frequency = <400000>;
        pinctrl-0 = <&i2c0_pins>;
        pinctrl-names = "default";
        status = "okay";
@@ -239,13 +238,11 @@
                };
        };
 
-       /* The MCP3021 is 100kHz clock only */
+       /* The MCP3021 supports standard and fast modes */
        mikrobus_adc: mcp3021@4c {
                compatible = "microchip,mcp3021";
                reg = <0x4c>;
        };
-
-       /* Also something at 0x64 */
 };
 
 &i2c1 {