linux-kernel - [PATCH RFC v3 2/6] arm: dts: marvell: armada-388-clearfog-base: add rfkill for m.2

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Message-Id: <20240720-a38x-utmi-phy-v3-2-4c16f9abdbdc@solid-run.com>
Date: Sat, 20 Jul 2024 16:19:19 +0200
From: Josua Mayer <josua@...id-run.com>
To: Vinod Koul <vkoul@...nel.org>, 
 Kishon Vijay Abraham I <kishon@...nel.org>, Andrew Lunn <andrew@...n.ch>, 
 Gregory Clement <gregory.clement@...tlin.com>, 
 Sebastian Hesselbarth <sebastian.hesselbarth@...il.com>, 
 Rob Herring <robh@...nel.org>, Krzysztof Kozlowski <krzk+dt@...nel.org>, 
 Conor Dooley <conor+dt@...nel.org>, Russell King <linux@...linux.org.uk>, 
 Konstantin Porotchkin <kostap@...vell.com>
Cc: Yazan Shhady <yazan.shhady@...id-run.com>, 
 linux-phy@...ts.infradead.org, linux-kernel@...r.kernel.org, 
 linux-arm-kernel@...ts.infradead.org, devicetree@...r.kernel.org, 
 Josua Mayer <josua@...id-run.com>
Subject: [PATCH RFC v3 2/6] arm: dts: marvell: armada-388-clearfog-base:
 add rfkill for m.2

Armada 388 Clearfog Base has a USB-3.0 / SATA capable m.2 connector,
with 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#

Add rfkill devices for gnss and wwan.

Signed-off-by: Josua Mayer <josua@...id-run.com>
---
 arch/arm/boot/dts/marvell/armada-388-clearfog-base.dts | 17 +++++++++++++++++
 1 file changed, 17 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 03153186c7bb..308ad9d1c70f 100644
--- a/arch/arm/boot/dts/marvell/armada-388-clearfog-base.dts
+++ b/arch/arm/boot/dts/marvell/armada-388-clearfog-base.dts
@@ -27,6 +27,23 @@ button-0 {
 			linux,code = <BTN_0>;
 		};
 	};
+
+	rfkill-m2-gnss {
+		compatible = "rfkill-gpio";
+		label = "m.2 GNSS";
+		radio-type = "gps";
+		/* rfkill-gpio inverts internally */
+		shutdown-gpios = <&expander0 9 GPIO_ACTIVE_HIGH>;
+	};
+
+	/* M.2 is B-keyed, so w-disable is for WWAN */
+	rfkill-m2-wwan {
+		compatible = "rfkill-gpio";
+		label = "m.2 WWAN";
+		radio-type = "wwan";
+		/* rfkill-gpio inverts internally */
+		shutdown-gpios = <&expander0 8 GPIO_ACTIVE_HIGH>;
+	};
 };
 
 &eth1 {

-- 
2.43.0