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rockchip: dts: rk3399-puma: add a 'tsd, usb-port-power' stringlist for USB1

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USB1 is connected to the on-module USB 3.0 hub and power to the hub
(actually it's a reset signal, modeled as a fixed regulator, that will
be released) should be enabled only during the first probing of the
device to avoid the hub from entering its low-power mode (where it
tries to attach on a fixed interval, but we always miss the timeslot
when U-Boot has the controller listening).

This adds a 'tsd,usb-port-power' stringlist to enable the
infrastructure in the board-specific usb_hub_reset_devices to find and
control the fixed regulator associated with control of the USB hub.

Signed-off-by: Philipp Tomsich <philipp.tomsich@theobroma-systems.com>
Tested-by: Jakob Unterwurzacher <jakob.unterwurzacher@theobroma-systems.com>
This commit is contained in:
Philipp Tomsich 2017-11-22 17:15:19 +01:00
parent 614539d4f7
commit 884ad05d34
1 changed files with 1 additions and 0 deletions
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arch/arm/dts/rk3399-puma.dtsi
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@ -544,6 +544,7 @@
&dwc3_typec1 { &dwc3_typec1 {
status = "okay"; status = "okay";
tsd,usb-port-power = "usbhub_enable";
}; };
&vopb { &vopb {