From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 16876CA5FB1 for ; Wed, 30 Sep 2026 11:51:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:Content-Transfer-Encoding: Content-Type:In-Reply-To:References:Cc:To:From:Subject:MIME-Version:Date: Message-ID:Reply-To:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=8XCU4MQS8FddGxbqTGB/oQsbxL2Xtt6aCSHUXFWTIFQ=; b=dhkUmLPmR6HohunjvkXWWPR9UZ oMkAgS7/N3ATY8/KDMgJYjzO9uLuevtI4tnxJqeT/YGHhF/bwpG2oeVVUIcBWRNoSfEP6yYc4TNVl A8QUJ8PUIfobmuqVRGBZOLSFm3pxsQHOi3LO80MRe8U46wUFNthLTwCvfKh/JFa7d3b8Q8l6m/04Q 0RrmycxCrUvya+YOo+sk/QMbA2rn5+2NKj2BgPoNPmeb5KxSDG5LNqDJmtuju1KnCPUfqmhZzYCLx 61M1IpHbnPYkz0kWtsgT8JKCvU+xsq34v2c5ocLEYfcLa+RdjiNlJao/TxgGVSAyVRQ0Swus41rhb lvlbkGpQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1xBspw-00000005vXv-3CNF; Wed, 30 Sep 2026 11:51:00 +0000 Received: from sea.source.kernel.org ([172.234.252.31]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1xBspu-00000005vWr-1X1k; Wed, 30 Sep 2026 11:50:58 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by sea.source.kernel.org (Postfix) with ESMTP id 0D9B041FE4; Wed, 30 Sep 2026 11:50:58 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 4AB5C1F00893; Wed, 30 Sep 2026 11:50:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1790769057; bh=8XCU4MQS8FddGxbqTGB/oQsbxL2Xtt6aCSHUXFWTIFQ=; h=Date:Subject:From:To:Cc:References:In-Reply-To; b=dtUhLBblbqcZi62VlxZoeUQn0kLmO4+x8QiLE+InV0zooxBoxH5ewP8EVJ1q7EbzC +Cbxa8u+cF5x8tqhmsErHIPSro+5Ye/8h2bp+GWRtGXj+EGFy9WIbBki5wPTGWRYkN tNYEvICgG9Psr2eMPVXcrYLkz3xP78TbP9JoHqkf8ZjlcONlVdcvAyLgsxf+HmNhrL 1CYkKxCd3le6N6vT8L19NVW8GOe3bJw+bpiAWDAnaVCSyH/oesTq8E93oIdn3ydG++ TCATm/JrOwn8fDk2iokxhMtBScjgPBy4+OFcsYKubf6QB/Waz2XgdTewsWPh1LtBar lCkjUsbHrxgTw== Message-ID: Date: Wed, 30 Sep 2026 13:50:50 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH v2 2/5] dt-bindings: power: reset: syscon-reboot-mode: allow supplies From: Krzysztof Kozlowski To: Alexey Charkov Cc: Rob Herring , Krzysztof Kozlowski , Conor Dooley , Heiko Stuebner , Sebastian Reichel , devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-rockchip@lists.infradead.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, Shawn Lin References: <20260929-b4-rk3576-reboot-mode-v2-0-5a34ca72065a@flipper.net> <20260929-b4-rk3576-reboot-mode-v2-2-5a34ca72065a@flipper.net> <20260930-fascinating-cheetah-of-speed-7cccd0@quoll> Content-Language: en-US Autocrypt: addr=krzk@kernel.org; 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charset=UTF-8 Content-Transfer-Encoding: 7bit X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 30/09/2026 13:47, Krzysztof Kozlowski wrote: > On Tue, Sep 29, 2026 at 02:28:19PM +0400, Alexey Charkov wrote: >> Whatever program that acts on a reboot mode runs before a full OS, so it >> may lack the capability to enable the regulators it depends on, and a >> reset that preserves the mode register generally leaves the regulators as >> the previously running system left them. >> >> Allow a reboot mode node to name such supplies, so that they can be >> turned on while the mode is being requested. >> >> Tested-by: Shawn Lin > > Again fake tag. > >> Signed-off-by: Alexey Charkov >> --- >> .../devicetree/bindings/power/reset/syscon-reboot-mode.yaml | 8 ++++++++ >> 1 file changed, 8 insertions(+) >> >> diff --git a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml >> index 79ffc78b23ea..5ed70c87269e 100644 >> --- a/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml >> +++ b/Documentation/devicetree/bindings/power/reset/syscon-reboot-mode.yaml >> @@ -36,6 +36,14 @@ patternProperties: >> "^mode-.*$": >> maxItems: 1 >> >> + "^[a-z0-9]+(-[a-z0-9]+)*-supply$": >> + description: >> + Supply that has to be powered for whatever program acts on the mode. >> + That could be a boot ROM with no access to regulators, and a warm reset >> + leaves them as the previously running system left them and not necessarily >> + what their expected out-of-reboot state is. Any supply described here is >> + enabled when a mode is requested, and stays enabled. > > This looks like workaround for missing supply handling in actual > consumers. Fix your devices instead. Heh, I misread - you need to power this on? Then how does your board powers itself in the first place? And how do you even solve the incorrect - e.g. too low - voltage on these regulators? Best regards, Krzysztof