linux-kernel - [PATCH v2 2/2] arm64: dts: ti: k3-am642: reserve gpio in mcu domain for firmware usage

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Message-ID: <20210304112924.12470-3-a-govindraju@ti.com>
Date:   Thu, 4 Mar 2021 16:59:24 +0530
From:   Aswath Govindraju <a-govindraju@...com>
To:     unlisted-recipients:; (no To-header on input)
CC:     Vignesh Raghavendra <vigneshr@...com>,
        Lokesh Vutla <lokeshvutla@...com>,
        Kishon Vijay Abraham I <kishon@...com>,
        Grygorii Strashko <grygorii.strashko@...com>,
        Dave Gerlach <d-gerlach@...com>,
        Aswath Govindraju <a-govindraju@...com>,
        Nishanth Menon <nm@...com>, Tero Kristo <kristo@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>
Subject: [PATCH v2 2/2] arm64: dts: ti: k3-am642: reserve gpio in mcu domain for firmware usage

The gpio0 subsystem present in MCU domain might be used by firmware and is
not pinned out in evm/sk. Therefore, reserve it for MCU firmware.

Signed-off-by: Aswath Govindraju <a-govindraju@...com>
---
 arch/arm64/boot/dts/ti/k3-am642-evm.dts | 5 +++++
 arch/arm64/boot/dts/ti/k3-am642-sk.dts  | 5 +++++
 2 files changed, 10 insertions(+)

diff --git a/arch/arm64/boot/dts/ti/k3-am642-evm.dts b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
index 962ef807e286..982b043c5100 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-evm.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-evm.dts
@@ -279,6 +279,11 @@
 	};
 };
 
+/* mcu_gpio0 is reserved for mcu firmware usage */
+&mcu_gpio0 {
+	status = "reserved";
+};
+
 &mcu_i2c0 {
 	status = "disabled";
 };
diff --git a/arch/arm64/boot/dts/ti/k3-am642-sk.dts b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
index 397ed3b2e121..7ba1d6da4d9d 100644
--- a/arch/arm64/boot/dts/ti/k3-am642-sk.dts
+++ b/arch/arm64/boot/dts/ti/k3-am642-sk.dts
@@ -204,6 +204,11 @@
 	status = "disabled";
 };
 
+/* mcu_gpio0 is reserved for mcu firmware usage */
+&mcu_gpio0 {
+	status = "reserved";
+};
+
 &sdhci1 {
 	/* SD/MMC */
 	vmmc-supply = <&vdd_mmc1>;
-- 
2.17.1