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FogBugz #291479: arria10 devkit: slow i2c bus for lcd module

Seeing intermittent missing characters on newhaven serial
display so slow the rising/falling time to 6000nSec for
Arria10 devkit.

Signed-off-by: Alan Tull <atull@opensource.altera.com>
1 parent eebb914 commit 014fe8ddb73146259ab52deabc4a53e17e0105a6 @atull-altera atull-altera committed Apr 8, 2015
Showing with 2 additions and 2 deletions.
  1. +2 −2 arch/arm/boot/dts/socfpga_arria10_socdk.dtsi
@@ -185,8 +185,8 @@
* adjust the falling times to decrease the i2c frequency to 50Khz
* because the LCD module does not work at the standard 100Khz
*/
- i2c-sda-falling-time-ns = <5000>;
- i2c-scl-falling-time-ns = <5000>;
+ i2c-sda-falling-time-ns = <6000>;
+ i2c-scl-falling-time-ns = <6000>;
lcd: lcd@28 {
compatible = "newhaven,nhd-0216k3z-nsw-bbw";

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