moby: limit i2c1 frequency to 400 kHz

2024-10-15 03:48:28 +00:00
parent 0a2945e9a9
commit 9fbe040ea5
1 changed files with 4 additions and 1 deletions
--- a/hosts/modules/hal/pine64-pinephone-pro/rk3399-pinephone-pro-sound.dtso
+++ b/hosts/modules/hal/pine64-pinephone-pro/rk3399-pinephone-pro-sound.dtso
@@ -188,7 +188,10 @@
 // declared in rk3399-base.dtsi, as `i2c1: i2c@ff110000 { ... }`
 &i2c1 {
        status = "okay";
-        // clock-frequency = <400000>;
+        // ALC5640 datasheet specifies max i2c rate of 400kHz
+        // - max rise time: 300ns
+        // - max fall time: 300ns
+        clock-frequency = <400000>;
        // from rk3399-firefly.dts
        // note that i2c3 in pinephone-pro is defined as 450/15 rise/fall
        i2c-scl-rising-time-ns = <300>;