[PATCH 5.1 122/122] ARM: dts: imx6q-logicpd: Reduce inrush current on start

Greg Kroah-Hartman
2019-05-23T19:31:35Z

From: Adam Ford <aford173@gmail.com>

commit dbb58e291cd47e594b64293bd91a4ce40626513c upstream.

The main 3.3V regulator sources a series of additional regulators.
This patch adds a small delay, so when the 3.3V regulator comes
on it delays a bit before the subsequent regulators can come on.
This reduces the inrush current a bit on the external DC power
supply to help prevent a situation where the sourcing power supply
cannot source enough current and overloads and the kit fails to
start.

Fixes: 1c207f911fe9 ("ARM: dts: imx: Add support for Logic PD i.MX6QD EVM")
Signed-off-by: Adam Ford <aford173@gmail.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi | 1 +
1 file changed, 1 insertion(+)

--- a/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
+++ b/arch/arm/boot/dts/imx6-logicpd-baseboard.dtsi
@@ -100,6 +100,7 @@
regulator-min-microvolt = <3300000>;
regulator-max-microvolt = <3300000>;
gpio = <&gpio1 26 GPIO_ACTIVE_HIGH>;
+ startup-delay-us = <70000>;
enable-active-high;
regulator-always-on;
};