linux-kernel - [PATCH v1] arm64: dts: imx8-apalis: set wifi regulator to always-on

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Date:   Thu, 23 Nov 2023 11:48:12 +0100
From:   Francesco Dolcini <francesco@...cini.it>
To:     Rob Herring <robh+dt@...nel.org>,
        Krzysztof Kozlowski <krzysztof.kozlowski+dt@...aro.org>,
        Conor Dooley <conor+dt@...nel.org>,
        Shawn Guo <shawnguo@...nel.org>,
        Sascha Hauer <s.hauer@...gutronix.de>,
        Pengutronix Kernel Team <kernel@...gutronix.de>,
        Fabio Estevam <festevam@...il.com>,
        NXP Linux Team <linux-imx@....com>
Cc:     Stefan Eichenberger <stefan.eichenberger@...adex.com>,
        devicetree@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
        linux-kernel@...r.kernel.org,
        Francesco Dolcini <francesco.dolcini@...adex.com>
Subject: [PATCH v1] arm64: dts: imx8-apalis: set wifi regulator to always-on

From: Stefan Eichenberger <stefan.eichenberger@...adex.com>

Make sure that the wifi regulator is always on. The wifi driver itself
puts the wifi module into suspend mode. If we cut the power the driver
will crash when resuming from suspend.

Signed-off-by: Stefan Eichenberger <stefan.eichenberger@...adex.com>
Signed-off-by: Francesco Dolcini <francesco.dolcini@...adex.com>
---
 arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
index 5ce5fbf2b38e..f69b0c17560a 100644
--- a/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
+++ b/arch/arm64/boot/dts/freescale/imx8-apalis-v1.1.dtsi
@@ -82,12 +82,9 @@ reg_module_wifi: regulator-module-wifi {
 		pinctrl-0 = <&pinctrl_wifi_pdn>;
 		gpio = <&lsio_gpio1 28 GPIO_ACTIVE_HIGH>;
 		enable-active-high;
+		regulator-always-on;
 		regulator-name = "wifi_pwrdn_fake_regulator";
 		regulator-settling-time-us = <100>;
-
-		regulator-state-mem {
-			regulator-off-in-suspend;
-		};
 	};
 
 	reg_pcie_switch: regulator-pcie-switch {
-- 
2.25.1