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 EED1BEA3F0B for ; Tue, 10 Feb 2026 05:41:04 +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: MIME-Version:References:In-Reply-To:Message-ID:Date:Subject:Cc:To:From: Reply-To:Content-Type:Content-ID:Content-Description:Resent-Date:Resent-From: Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=b3tE87q+qfGSEa6Oly0BwPABhpAUQacJ2LeCqBjkgvs=; b=CGQYpOiMvtOwTqS+AotOfMx9wf dItC32CYJ7HeZKBdTzdktCRABh1VGZTt15QtuCuumAHPS04gLZxajUgbwDYIpmbPKdNKjs1VM8Ywh mB/RsCNOHCTNbYOwbbqhD+01gL9GwEv1q4/t3EG+i08oM53f+TIs2HliyBI1PZGTTGy8DNxX+jZCN wAzic0VdK3b9QT6dDCl6+VhPa+8kWBCnrN+8LIlUwtfQ053/S93bQGO5MMA7comMz84FRQDrS+xAr 0f0t4Q8ixmgb6Kfs0ywdggM73RQ/yqIgHovIDmoMEmvHNe/Sl9amMh1La11o8m1iWyMC1d0CMWQOc IrYlaZ/A==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1vpgUh-0000000GU6r-44me; Tue, 10 Feb 2026 05:41:03 +0000 Received: from mail-qk1-x72b.google.com ([2607:f8b0:4864:20::72b]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1vpgUe-0000000GU1K-1NqM for linux-mediatek@lists.infradead.org; Tue, 10 Feb 2026 05:41:01 +0000 Received: by mail-qk1-x72b.google.com with SMTP id af79cd13be357-8c6b16bd040so516459085a.1 for ; Mon, 09 Feb 2026 21:40:59 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20230601; t=1770702059; x=1771306859; darn=lists.infradead.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=b3tE87q+qfGSEa6Oly0BwPABhpAUQacJ2LeCqBjkgvs=; b=Au/y28rXI+CNXaEBwD+6yz1U0dF4n4CFNgfHIsh6aZBKYITOhs9RU4I+3N3Q+FjYzi Hbt6tC7gm9ZZivxduhb0RnG7ZlF9tUi1VLNETNvTMLL4pPrIRgSp/VnIHH8Vvc3ukrTj Xqpijljkf2Q0zH+oz2UdpagdRb6KVHDWHXkpQOG4DxilS8OAYWxXl/TngvbvHxY0+/KD CISfoAzzzfH+FgMOF1eJC9fX3t1LfJh4BDn1i35dwNBf2N3CvRm/MQqPxQ7qRUIsGGtb E82FIZhJ49ay7SKT7WeDknOz7NRYakrN++oIPHGzUMMMxQPYwEBOlCMXjQTYqJCAIq18 x59A== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1770702059; x=1771306859; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-gg:x-gm-message-state:from :to:cc:subject:date:message-id:reply-to; bh=b3tE87q+qfGSEa6Oly0BwPABhpAUQacJ2LeCqBjkgvs=; b=LQsFO28GxWVcIB9OiAS4vVitBLmVHcQgVBGvYMK215SgmVcNzTL2T7O7HeunEAqwDE lT1TqwZ00UmV6VHYGbKJkZoAPn7MRi9XHMiWieet+99BJo+Gz/YonodUe3pxvpFaCq0I eivQCLMgI2OpBeoBGy8Texn/U78Jilfu3GuU7TrCk61rCRk6yNYW5rKjPTsUXfuexW27 JoJz2ZODbFIM+13AwMTuCPBK7+DM/cyiAVP+WEse8ZXBfVuQgK+Li7rhGku5Mzu+JVss dmOoePrOWfUOW84aqaUkR/AWvzraKNzN58oKRga4hfa8Y3m8TfIlBPkupO9UfbzyGLSa 2WHg== X-Gm-Message-State: AOJu0Yw8k+GgYjPfU8I3U+djSCfK9QlUDm9ufFHG6+dgsAlgKmoc8fFq SaFFC4aR4wvu1KkLYcfdrr62HvtRZ00OfC421XFi+chIzZjN8hgFAy9GLyk9HnsG X-Gm-Gg: AZuq6aKn50DDkG5beBX6WtsVLgaxvxDODKxl57Bev0Ce7dOJSqHQFnRv1uHjZTdKa0w q8uOyVYb6RpfOVQ6eN/jjxMLsgWKzySJjDSdXOslXNkdhP3jLa+cAiEKFIMMKv+/LNMWZGhjLJr rTnZkHOsJoVT49EkRsK13sjKXqX3bgSfAAvCjaHZ+4+i/GD/8UgOu1GD9kRZ48CYATfQqT46MsF WbgMgU6NE4bQxnzxShydXpbz7vYDJYAvQlixp5qs5bvdGFiYpgmbjC+d06DZCdLf+qNQJYdmGIl Ywp+e7Co6EAeiLYQhte6jOJ1wElYsBRg3C3DVfxUgffrEsRgxUMDUhLBevTewg5CfedI64WW7dS HwG49s5Y5IraHmGwTpGnx+yEaz2o1C7Q4cXMj4rhulKvNAZ0h8Mr2zNTame1rAWNZHCJ/dykjcO 1lsdc+XsqvG3NGmtkeTixrVJS4DCejm1hFO8gRbSL3j7Uh7G3pIXOqWK9hW5XLDuba9ZgmmgqjI A== X-Received: by 2002:a05:620a:4041:b0:8ca:305b:748e with SMTP id af79cd13be357-8cb1f6ec283mr118885285a.57.1770702058705; Mon, 09 Feb 2026 21:40:58 -0800 (PST) Received: from aford-System-Version.lan (c-68-46-10-116.hsd1.mn.comcast.net. [68.46.10.116]) by smtp.gmail.com with ESMTPSA id af79cd13be357-8caf9ee9fbasm978632285a.39.2026.02.09.21.40.57 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 09 Feb 2026 21:40:58 -0800 (PST) From: Adam Ford To: linux-mediatek@lists.infradead.org Cc: angelogioacchino.delregno@collabora.com, Adam Ford , Michael Turquette , Stephen Boyd , Matthias Brugger , Ulf Hansson , Liam Girdwood , Mark Brown , Laura Nao , =?UTF-8?q?N=C3=ADcolas=20F=2E=20R=2E=20A=2E=20Prado?= , linux-clk@vger.kernel.org, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-pm@vger.kernel.org Subject: [PATCH 4/5] regulator: mt6363: Fix interrmittent timeout Date: Mon, 9 Feb 2026 23:37:04 -0600 Message-ID: <20260210053708.17239-4-aford173@gmail.com> X-Mailer: git-send-email 2.51.0 In-Reply-To: <20260210053708.17239-1-aford173@gmail.com> References: <20260210053708.17239-1-aford173@gmail.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260209_214100_463364_0F3790C4 X-CRM114-Status: GOOD ( 13.38 ) X-BeenThere: linux-mediatek@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-mediatek" Errors-To: linux-mediatek-bounces+linux-mediatek=archiver.kernel.org@lists.infradead.org Sometimes, the mt6363 regulator would fail to initialize and return with a TIMEOUT error, so add an extra instruction to wake up the bus before issuing the commands. Fixes: 3c36965df808 ("regulator: Add support for MediaTek MT6363 SPMI PMIC Regulators") Signed-off-by: Adam Ford --- drivers/regulator/mt6363-regulator.c | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) diff --git a/drivers/regulator/mt6363-regulator.c b/drivers/regulator/mt6363-regulator.c index e0fbf92e7685..03af5fa53600 100644 --- a/drivers/regulator/mt6363-regulator.c +++ b/drivers/regulator/mt6363-regulator.c @@ -861,7 +861,7 @@ static int mt6363_regulator_probe(struct platform_device *pdev) struct irq_domain *domain; struct irq_fwspec fwspec; struct spmi_device *sdev; - int i, ret; + int i, ret, val; config.regmap = mt6363_spmi_register_regmap(dev); if (IS_ERR(config.regmap)) @@ -870,6 +870,13 @@ static int mt6363_regulator_probe(struct platform_device *pdev) config.dev = dev; sdev = to_spmi_device(dev->parent); + /* + * The first read may fail if the bootloader sets sleep mode: wake up + * this PMIC with W/R on the SPMI bus and ignore the first result. + * This matches the MT6373 driver behavior. + */ + regmap_read(config.regmap, MT6363_TOP_TRAP, &val); + interrupt_parent = of_irq_find_parent(dev->of_node); if (!interrupt_parent) return dev_err_probe(dev, -EINVAL, "Cannot find IRQ parent\n"); -- 2.51.0