target/linux/mvebu/patches-4.14/413-ARM-dts-armada388-clearfog-increase-speed-of-i2c0-to.patch

   1 From 6e127081e669cf163a818dc04d590790e4ed9527 Mon Sep 17 00:00:00 2001
   2 From: Russell King <rmk+kernel@armlinux.org.uk>
   3 Date: Tue, 29 Nov 2016 20:06:44 +0000
   4 Subject: ARM: dts: armada388-clearfog: increase speed of i2c0 to 400kHz
   5
   6 All the devices on I2C0 support fast mode, so increase the bus speed
   7 to match.  The Armada 388 is known to have a timing issue when in
   8 standard mode, which we believe causes the ficticious device at 0x64
   9 to appear.
  10
  11 Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
  12 ---
  13  arch/arm/boot/dts/armada-388-clearfog.dtsi | 7 ++-----
  14  1 file changed, 2 insertions(+), 5 deletions(-)
  15
  16 --- a/arch/arm/boot/dts/armada-388-clearfog.dtsi
  17 +++ b/arch/arm/boot/dts/armada-388-clearfog.dtsi
  18 @@ -143,8 +143,7 @@
  19  };
  20
  21  &i2c0 {
  22 -       /* Is there anything on this? */
  23 -       clock-frequency = <100000>;
  24 +       clock-frequency = <400000>;
  25         pinctrl-0 = <&i2c0_pins>;
  26         pinctrl-names = "default";
  27         status = "okay";
  28 @@ -239,13 +238,11 @@
  29                 };
  30         };
  31
  32 -       /* The MCP3021 is 100kHz clock only */
  33 +       /* The MCP3021 supports standard and fast modes */
  34         mikrobus_adc: mcp3021@4c {
  35                 compatible = "microchip,mcp3021";
  36                 reg = <0x4c>;
  37         };
  38 -
  39 -       /* Also something at 0x64 */
  40  };
  41
  42  &i2c1 {