From: Laurentiu Palcu <laurentiu.palcu@oss.nxp.com>
To: Francesco Dolcini <francesco@dolcini.it>
Cc: Rob Herring <robh@kernel.org>,
Krzysztof Kozlowski <krzk+dt@kernel.org>,
Conor Dooley <conor+dt@kernel.org>, Frank Li <Frank.Li@nxp.com>,
Sascha Hauer <s.hauer@pengutronix.de>,
Pengutronix Kernel Team <kernel@pengutronix.de>,
Fabio Estevam <festevam@gmail.com>,
Francesco Dolcini <francesco.dolcini@toradex.com>,
devicetree@vger.kernel.org, imx@lists.linux.dev,
linux-arm-kernel@lists.infradead.org,
linux-kernel@vger.kernel.org
Subject: Re: [PATCH v1 0/2] arm64: dts: freescale: imx95-aquila: Keep DP_PWR always enabled
Date: Tue, 3 Nov 2026 14:25:02 +0200 [thread overview]
Message-ID: <aunOT21BZmGkJQ25@vm> (raw)
In-Reply-To: <20261103105323.2394012-1-francesco@dolcini.it>
Hi Francesco,
On Tue, Nov 03, 2026 at 11:53:14AM +0100, Francesco Dolcini wrote:
> From: Francesco Dolcini <francesco.dolcini@toradex.com>
>
> DP_PWR on the DisplayPort connector powers active DP cables and
> adapters, which do not work without it. Keep it always enabled, and mark
> it boot-on so that the firmware, e.g. U-Boot, enables it at boot,
I believe this "mark it boot-on so that the firmware, e.g. U-Boot,
enables it at boot" sentence is a bit misleading. AFAIK, u-boot does not
parse the kernel dtb to see which regulators need to be enabled. The
'regulator-boot-on' property in kernel dtb regulator node simply
indicates that this regulator was left ON by the bootloader (see
Documentation/devicetree/bindings/regulator/regulator.yaml). If your
goal is to have the regulator enabled by u-boot, I believe you need to
add that in u-boot dtb as well.
Consider updating the commit messages on both patches accordingly.
--
Thanks,
Laurentiu
next prev parent reply other threads:[~2026-11-03 12:25 UTC|newest]
Thread overview: 8+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-11-03 10:53 Francesco Dolcini
2026-11-03 10:53 ` [PATCH v1 1/2] arm64: dts: freescale: imx95-aquila-dev: " Francesco Dolcini
2026-11-03 12:53 ` Laurentiu Palcu
2026-11-03 10:53 ` [PATCH v1 2/2] arm64: dts: freescale: imx95-aquila-clover: " Francesco Dolcini
2026-11-03 12:53 ` Laurentiu Palcu
2026-11-03 12:25 ` Laurentiu Palcu [this message]
2026-11-03 12:33 ` [PATCH v1 0/2] arm64: dts: freescale: imx95-aquila: " Francesco Dolcini
2026-11-03 12:52 ` Laurentiu Palcu
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