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ARM: dts: socfpga: set desired i2c clock on Cyclone5 and Arria5 devkits 

The I2C LCD display on the Cyclone5 and Arria5 devkits is only capable of
the standard 100 kHz clock. Set the "clock-frequency" of the I2C node
to be 100000.

Signed-off-by: Dinh Nguyen <dinguyen@kernel.org>
hifive-unleashed-5.1
Dinh Nguyen 2016-12-13 16:52:11 -06:00
parent 55b0f44cc2
commit 4d3e72b119
2 changed files with 16 additions and 0 deletions
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8
arch/arm/boot/dts/socfpga_arria5_socdk.dts
View File

@ -98,6 +98,14 @@
&i2c0 {
status = "okay";
clock-frequency = <100000>;
/*
* 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>;
eeprom@51 {
compatible = "atmel,24c32";

8
arch/arm/boot/dts/socfpga_cyclone5_socdk.dts
View File

@ -98,6 +98,14 @@
&i2c0 {
status = "okay";
clock-frequency = <100000>;
/*
* 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>;
eeprom@51 {
compatible = "atmel,24c32";