[PATCH master 3/3] ARM: i.MX8MN: assume USBOTG power domains to be powered

[Ahmad Fatoum]

When i.MX8MN support was first added, upstream device tree did list no
power domains. Now it does and we defer probe of USB indefinitely
because we have no power domain driver. If we need to do PCI on the
i.MX8MM in barebox, there'll likely be no way around importing the power
domain driver, but for USB which used to work, only thing we need to do
is ignore the new power domain specification. Do so by adding the
new barebox,allow-dummy property to the new known-enabled power domain.

Fixes: b01786baa849 ("dts: update to v5.18-rc1")
Signed-off-by: Ahmad Fatoum <a.fatoum at pengutronix.de>
---
Untested on actual i.MX8MN HW, but close enough i.MX8MM. i.MX8MP is
also affect since v5.19-rc1 sync, but we have no USB support there yet.
Power domains also seems more complicated on 8MPlus where we have a
blk-ctrl power domain driver in-between usbotg and gpcv2.
---
 arch/arm/dts/imx8mn-evk.dtsi | 2 ++
 arch/arm/dts/imx8mn.dtsi     | 5 +++++
 2 files changed, 7 insertions(+)
 create mode 100644 arch/arm/dts/imx8mn.dtsi

diff --git a/arch/arm/dts/imx8mn-evk.dtsi b/arch/arm/dts/imx8mn-evk.dtsi
index ceeb5f8b9384..aeb357007991 100644
--- a/arch/arm/dts/imx8mn-evk.dtsi
+++ b/arch/arm/dts/imx8mn-evk.dtsi
@@ -4,6 +4,8 @@
  * Copyright (C) 2017 Pengutronix, Lucas Stach <kernel at pengutronix.de>
  */
 
+#include "imx8mn.dtsi"
+
 / {
 	chosen {
 		environment-sd {
diff --git a/arch/arm/dts/imx8mn.dtsi b/arch/arm/dts/imx8mn.dtsi
new file mode 100644
index 000000000000..176125e73bce
--- /dev/null
+++ b/arch/arm/dts/imx8mn.dtsi
@@ -0,0 +1,5 @@
+// SPDX-License-Identifier: (GPL-2.0+ OR MIT)
+
+&pgc_otg1 {
+	barebox,allow-dummy;
+};
-- 
2.30.2