linux-kernel - Re: [PATCH v2] arm64: dts: imx8mp-var-som: Fix LDO5 shutdown causing SD card timeout

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Message-ID: <aB4V76XU9Cyl48pl@dragon>
Date: Fri, 9 May 2025 22:49:19 +0800
From: Shawn Guo <shawnguo2@...h.net>
To: Himanshu Bhavani <himanshu.bhavani@...iconsignals.io>
Cc: shawnguo@...nel.org, tarang.raval@...iconsignals.io,
	Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Sascha Hauer <s.hauer@...gutronix.de>,
	Pengutronix Kernel Team <kernel@...gutronix.de>,
	Fabio Estevam <festevam@...il.com>, devicetree@...r.kernel.org,
	imx@...ts.linux.dev, linux-arm-kernel@...ts.infradead.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] arm64: dts: imx8mp-var-som: Fix LDO5 shutdown causing
 SD card timeout

On Mon, May 05, 2025 at 11:28:27AM +0530, Himanshu Bhavani wrote:
> Fix SD card timeout issue caused by LDO5 regulator getting disabled
> after boot.
> 
> The kernel log shows LDO5 being disabled, which leads to a timeout
> on USDHC2:
> [   33.760561] LDO5: disabling
> [   81.119861] mmc1: Timeout waiting for hardware interrupt.
> 
> To prevent this, set regulator-boot-on and regulator-always-on for
> LDO5. Also add the vqmmc regulator to properly support 1.8V/3.3V
> signaling for USDHC2 using a GPIO-controlled regulator.
> 
> Fixes: 6c2a1f4f71258 ("arm64: dts: imx8mp-var-som-symphony: Add Variscite Symphony board and VAR-SOM-MX8MP SoM")
> Signed-off-by: Himanshu Bhavani <himanshu.bhavani@...iconsignals.io>

Applied, thanks!