a6ee913fae
* Explicitly set vdd_log voltage for NanoPi M4V2 - possibly fix stability issues * Regulator tweaks for NanoPi M4V2 * Add vdd_log to kernel and switch vdd_center back to 900mV * Switch vdd_center to 0.95 * Make rk80x bucks voltage steps shorter to make the NanoPi M4V2 stable * Tweak u-boot config for NanoPi M4V2 * Made the rk808 voltage steps configurable and configured 50mV for NanoPi M4V2
30 lines
886 B
Diff
30 lines
886 B
Diff
By default rk808's buck regulators switch voltage in multiple 100mV jumps.
|
|
This seems to be too much for NanoPi M4V2 and makes it unstable.
|
|
|
|
Shortening the steps to 50mV (4 multiple of base buck step which is 12.5mV)
|
|
makes the NanoPi M4V2 stable.
|
|
Tested with multiple hours of running memtester without a single failure.
|
|
|
|
Signed-off-by: Piotr Szczepanik <piter75@gmail.com>
|
|
|
|
diff --git a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-m4v2.dts b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-m4v2.dts
|
|
index 2dcaf497c..094440ce3 100644
|
|
--- a/arch/arm64/boot/dts/rockchip/rk3399-nanopi-m4v2.dts
|
|
+++ b/arch/arm64/boot/dts/rockchip/rk3399-nanopi-m4v2.dts
|
|
@@ -64,6 +64,10 @@ &gmac {
|
|
rx_delay = <0x16>;
|
|
};
|
|
|
|
+&rk808 {
|
|
+ max-buck-steps-per-change = <4>;
|
|
+};
|
|
+
|
|
&vcc3v3_sys {
|
|
vin-supply = <&vcc5v0_core>;
|
|
};
|
|
@@ -80,3 +84,4 @@ &vbus_typec {
|
|
regulator-always-on;
|
|
vin-supply = <&vdd_5v>;
|
|
};
|
|
+
|