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 X-Spam-Level: X-Spam-Status: No, score=-10.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE, SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id A06C0C433E1 for ; Thu, 18 Jun 2020 01:29:28 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 69D7422229 for ; Thu, 18 Jun 2020 01:29:28 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="rgml42Nx"; dkim=fail reason="signature verification failed" (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="pSDQeYDY" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 69D7422229 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-Id:Date:Subject:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=1YrKbszlv4KUI71XDQ7671eYvRQyMkm5U2HKsLTiDDE=; b=rgml42NxNLbuG1 cLmoI4bHXgtCh398GG36UrwmPwkiYQblWz+Es7aONGx+O8UxtQ4YdrVZNfBhGgmhVTpVTQBQEtu// Qapb59cdzNOM7fiFMfjQsWS0pR8Mws6zy+ehTiv/QViuhIzIvvjZSY245oDFyYumF51qC6o7JtDkn lXL1GNPiPvALf+7wnRO8gDBTpjapUEdNMGSG6/uLsws+0tzbKvNY8oMWZKgjyPz7voTmOcgm3m1uw 5XJUcOZbWTO1iGenI7AECX6eZb1bIeBkCyhfeo+nvkfKNYMpKoX7+xIpd7iZvAWGC6NnSqbsZuvtu BlsdGI19osGXHCz5yZnA==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1jljMt-0005yh-7e; Thu, 18 Jun 2020 01:29:27 +0000 Received: from mail.kernel.org ([198.145.29.99]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1jlj7w-0003I6-IW for linux-arm-kernel@lists.infradead.org; Thu, 18 Jun 2020 01:14:02 +0000 Received: from sasha-vm.mshome.net (c-73-47-72-35.hsd1.nh.comcast.net [73.47.72.35]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 223FD20EDD; Thu, 18 Jun 2020 01:13:59 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1592442839; bh=URc4789k/5yNLxNApylXOdyYnfGKoDQJ73exVVOeipg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=pSDQeYDYBFBCuBZ/cOGU4Smv8XdIxIgV2D7BYLdeNtoR2jivQLPE1TnCyTPUaYlen BA8V4L0TQwsvK0MP4P6WXwCSMzoLElJk4+9TB49k7JO4eltVOVZnWo8nGOtekY8/G/ hpOSiuJTz7EI0MPi3BviGS0qGEyyinit78TToNck= From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Subject: [PATCH AUTOSEL 5.7 273/388] mfd: stmfx: Reset chip on resume as supply was disabled Date: Wed, 17 Jun 2020 21:06:10 -0400 Message-Id: <20200618010805.600873-273-sashal@kernel.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200618010805.600873-1-sashal@kernel.org> References: <20200618010805.600873-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200617_181400_667955_E661E940 X-CRM114-Status: GOOD ( 10.46 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Sasha Levin , Amelie Delaunay , Lee Jones , linux-stm32@st-md-mailman.stormreply.com, linux-arm-kernel@lists.infradead.org Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org From: Amelie Delaunay [ Upstream commit e583649d87ec090444aa5347af0927cd6e8581ae ] STMFX supply is disabled during suspend. To avoid a too early access to the STMFX firmware on resume, reset the chip and wait for its firmware to be loaded. Fixes: 06252ade9156 ("mfd: Add ST Multi-Function eXpander (STMFX) core driver") Signed-off-by: Amelie Delaunay Signed-off-by: Lee Jones Signed-off-by: Sasha Levin --- drivers/mfd/stmfx.c | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/drivers/mfd/stmfx.c b/drivers/mfd/stmfx.c index 857991cb3cbb..fde6541e347c 100644 --- a/drivers/mfd/stmfx.c +++ b/drivers/mfd/stmfx.c @@ -501,6 +501,13 @@ static int stmfx_resume(struct device *dev) } } + /* Reset STMFX - supply has been stopped during suspend */ + ret = stmfx_chip_reset(stmfx); + if (ret) { + dev_err(stmfx->dev, "Failed to reset chip: %d\n", ret); + return ret; + } + ret = regmap_raw_write(stmfx->map, STMFX_REG_SYS_CTRL, &stmfx->bkp_sysctrl, sizeof(stmfx->bkp_sysctrl)); if (ret) -- 2.25.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel