linux-kernel - [PATCH v2 mvebu + mvebu/dt64 6/6] arm64: dts: marvell: armada-37xx: move firmware node to generic dtsi file

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Message-Id: <20210429083636.22560-6-pali@kernel.org>
Date:   Thu, 29 Apr 2021 10:36:36 +0200
From:   Pali Rohár <pali@...nel.org>
To:     Gregory CLEMENT <gregory.clement@...tlin.com>,
        Andrew Lunn <andrew@...n.ch>
Cc:     Marek Behún <kabel@...nel.org>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: [PATCH v2 mvebu + mvebu/dt64 6/6] arm64: dts: marvell: armada-37xx: move firmware node to generic dtsi file

Move the turris-mox-rwtm firmware node from Turris MOX' device tree into
the generic armada-37xx.dtsi file and use the generic compatible string
'marvell,armada-3700-rwtm-firmware' instead of the current one.

The Turris MOX rWTM firmware can be used on any Armada 37xx device,
giving them access to the rWTM hardware random number generator, which
is otherwise unavailable.

This change allows Linux to load the turris-mox-rwtm.ko module on these
boards.

Tested on ESPRESSObin v5 with both default Marvell WTMI firmware and
CZ.NIC's firmware. With default WTMI firmware the turris-mox-rwtm fails
to probe, while with CZ.NIC's firmware it registers the HW random number
generator.

Signed-off-by: Pali Rohár <pali@...nel.org>
Signed-off-by: Marek Behún <kabel@...nel.org>
Cc: <stable@...r.kernel.org> # 5.4+: 46d2f6d0c99f ("arm64: dts: armada-3720-turris-mox: add firmware node")
---
 arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts | 8 --------
 arch/arm64/boot/dts/marvell/armada-37xx.dtsi           | 8 ++++++++
 2 files changed, 8 insertions(+), 8 deletions(-)

diff --git a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
index 0753cc489638..ebb0ddf8d306 100644
--- a/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
+++ b/arch/arm64/boot/dts/marvell/armada-3720-turris-mox.dts
@@ -107,14 +107,6 @@
 		/* enabled by U-Boot if SFP module is present */
 		status = "disabled";
 	};
-
-	firmware {
-		turris-mox-rwtm {
-			compatible = "cznic,turris-mox-rwtm";
-			mboxes = <&rwtm 0>;
-			status = "okay";
-		};
-	};
 };
 
 &i2c0 {
diff --git a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
index 1b7f43e27589..847a2d12a4be 100644
--- a/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
+++ b/arch/arm64/boot/dts/marvell/armada-37xx.dtsi
@@ -505,4 +505,12 @@
 			};
 		};
 	};
+
+	firmware {
+		armada-3700-rwtm {
+			compatible = "marvell,armada-3700-rwtm-firmware";
+			mboxes = <&rwtm 0>;
+			status = "okay";
+		};
+	};
 };
-- 
2.20.1