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>

1 files changed, 2 insertions, 5 deletions

diff --git a/arch/arm/boot/dts/armada-388-clearfog.dtsi b/arch/arm/boot/dts/armada-388-clearfog.dtsi
index 68acfc968706..0e3b1f140e6d 100644
--- 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 {