[PATCH RFC v3 1/6] arm: dts: marvell: armada-388-clearfog: enable third usb on m.2/mpcie

[Josua Mayer]

Armada 388 Clearfog Pro has a USB-2.0 capable minipcie connector "CON2".
Clearfog Base has an M.2 connector combining USB-2.0 and USB-3.0 plus
various pins controlled by the host:

- FULL_CARD_POWER_OFF#: When low, M.2 LTE modules are switched off.
  Many modules include pull-down, thus it must be driven high actively.
- RESET#: Puts modules into reset when low. Modules are expected to
  include pull-up.
- GNSS_DISABLE#
- W_DISABLE#

Enable the usb controller node for the first combined usb-2.0/3.0
controller, for both clearfog base and pro.

To Clearfog base add gpio hogs for power-off and reset to ensure
modules are operational by default.

Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Josua Mayer <josua@xxxxxxxxxxxxx>
---
 .../boot/dts/marvell/armada-388-clearfog-base.dts   | 21 +++++++++++++++++++++
 arch/arm/boot/dts/marvell/armada-388-clearfog.dts   |  5 +++++
 2 files changed, 26 insertions(+)

diff --git a/arch/arm/boot/dts/marvell/armada-388-clearfog-base.dts b/arch/arm/boot/dts/marvell/armada-388-clearfog-base.dts
index f7daa3bc707e..03153186c7bb 100644
--- a/arch/arm/boot/dts/marvell/armada-388-clearfog-base.dts
+++ b/arch/arm/boot/dts/marvell/armada-388-clearfog-base.dts
@@ -33,6 +33,22 @@ &eth1 {
 	phy = <&phy1>;
 };
 
+&expander0 {
+	m2-full-card-power-off-hog {
+		gpio-hog;
+		gpios = <2 GPIO_ACTIVE_LOW>;
+		output-low;
+		line-name = "m2-full-card-power-off";
+	};
+
+	m2-reset-hog {
+		gpio-hog;
+		gpios = <10 GPIO_ACTIVE_LOW>;
+		output-low;
+		line-name = "m2-reset";
+	};
+};
+
 &gpio0 {
 	phy1_reset {
 		gpio-hog;
@@ -66,3 +82,8 @@ rear_button_pins: rear-button-pins {
 		marvell,function = "gpio";
 	};
 };
+
+/* SRDS #4 - USB-2.0/3.0 Host, M.2 */
+&usb3_0 {
+	status = "okay";
+};
diff --git a/arch/arm/boot/dts/marvell/armada-388-clearfog.dts b/arch/arm/boot/dts/marvell/armada-388-clearfog.dts
index 09bf2e6d4ed0..d6d7cc885f4d 100644
--- a/arch/arm/boot/dts/marvell/armada-388-clearfog.dts
+++ b/arch/arm/boot/dts/marvell/armada-388-clearfog.dts
@@ -182,3 +182,8 @@ &spi1 {
 	 */
 	pinctrl-0 = <&spi1_pins &clearfog_spi1_cs_pins &mikro_spi_pins>;
 };
+
+/* USB-2.0 Host, CON2 - nearest CPU */
+&usb3_0 {
+	status = "okay";
+};

-- 
2.43.0