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 lists.ozlabs.org (lists.ozlabs.org [112.213.38.117]) (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 6D7BAC25B08 for ; Sat, 20 Aug 2022 10:32:01 +0000 (UTC) Received: from boromir.ozlabs.org (localhost [IPv6:::1]) by lists.ozlabs.org (Postfix) with ESMTP id 4M8w0b5s60z3f3r for ; Sat, 20 Aug 2022 20:31:59 +1000 (AEST) Authentication-Results: lists.ozlabs.org; dkim=fail reason="signature verification failed" (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=NCc7Xx61; dkim-atps=neutral Authentication-Results: lists.ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=kernel.org (client-ip=145.40.68.75; helo=ams.source.kernel.org; envelope-from=pali@kernel.org; receiver=) Authentication-Results: lists.ozlabs.org; dkim=pass (2048-bit key; unprotected) header.d=kernel.org header.i=@kernel.org header.a=rsa-sha256 header.s=k20201202 header.b=NCc7Xx61; dkim-atps=neutral Received: from ams.source.kernel.org (ams.source.kernel.org [145.40.68.75]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by lists.ozlabs.org (Postfix) with ESMTPS id 4M8vyj6Lzcz3bdk for ; Sat, 20 Aug 2022 20:30:21 +1000 (AEST) Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ams.source.kernel.org (Postfix) with ESMTPS id 88579B80B92; Sat, 20 Aug 2022 10:30:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 27155C43470; Sat, 20 Aug 2022 10:30:16 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1660991416; bh=t182bdU7U0dEHPhdYXFdbvLZ9arqgWMZzee1Mf+ZirY=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=NCc7Xx617SRw8T03pXTirShIfv/L/8gUvO46Anrc5amwzv3MI6d3FBfFkKup+J7+x sywNGWX/nPsCgobgR+1Z7w3phYd/fzJRdY9Pg+UppCWvcnpWEDhJqzlCk8LavgBLBU SBq+ehrkh+qlerdjLPV9Vus5fO3yh78oEUx2QPCBCrTjUaNMMEX32m59qiBKfNWXYP clwoeiPDPS5w74K3MZr9eA8h92EkxswvILaq/47PV/YF3j3RmM/CygCnIDOO0CltIa QI4tMk7ZoAfRw+ehdyJ47bw+Ni2Mk1ze9W3pPOgVLunurp79D26okRdaibhy296yTk ECQanl+rOoeNQ== Received: by pali.im (Postfix) id BAA5E2BA5; Sat, 20 Aug 2022 12:30:13 +0200 (CEST) From: =?UTF-8?q?Pali=20Roh=C3=A1r?= To: Rob Herring , Krzysztof Kozlowski , Michael Ellerman Subject: [PATCH 3/3] powerpc: dts: turris1x.dts: Set lower priority for CPLD syscon-reboot Date: Sat, 20 Aug 2022 12:29:25 +0200 Message-Id: <20220820102925.29476-3-pali@kernel.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20220820102925.29476-1-pali@kernel.org> References: <20220820102925.29476-1-pali@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: linuxppc-dev@lists.ozlabs.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Linux on PowerPC Developers Mail List List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: =?UTF-8?q?Marek=20Beh=C3=BAn?= , devicetree@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org Errors-To: linuxppc-dev-bounces+linuxppc-dev=archiver.kernel.org@lists.ozlabs.org Sender: "Linuxppc-dev" Due to CPLD firmware bugs, set CPLD syscon-reboot priority level to 64 (between rstcr and watchdog) to ensure that rstcr's global-utilities reset method which is preferred stay as default one, and to ensure that CPLD syscon-reboot is more preferred than watchdog reset method. Fixes: 0531a4abd1c6 ("powerpc: dts: turris1x.dts: Add CPLD reboot node") Signed-off-by: Pali Rohár --- arch/powerpc/boot/dts/turris1x.dts | 23 +++++++++++++++++++++++ 1 file changed, 23 insertions(+) diff --git a/arch/powerpc/boot/dts/turris1x.dts b/arch/powerpc/boot/dts/turris1x.dts index 69c38ed8a3a5..c189293d5a1e 100644 --- a/arch/powerpc/boot/dts/turris1x.dts +++ b/arch/powerpc/boot/dts/turris1x.dts @@ -353,11 +353,34 @@ }; reboot@d { + /* + * CPLD firmware which manages system reset and + * watchdog registers has bugs. It does not + * autoclear system reset register after change + * and watchdog ignores reset line on immediate + * succeeding reset cycle triggered by watchdog. + * These bugs have to be workarounded in U-Boot + * bootloader. So use system reset via syscon as + * a last resort because older U-Boot versions + * do not have workaround for watchdog. + * + * Reset method via rstcr's global-utilities + * (the preferred one) has priority level 128, + * watchdog has priority level 0 and default + * syscon-reboot priority level is 192. + * + * So define syscon-reboot with custom priority + * level 64 (between rstcr and watchdog) because + * rstcr should stay as default preferred reset + * method and reset via watchdog is more broken + * than system reset via syscon. + */ compatible = "syscon-reboot"; reg = <0x0d 0x01>; offset = <0x0d>; mask = <0x01>; value = <0x01>; + priority = <64>; }; led-controller@13 { -- 2.20.1