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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id E7794C433FE for ; Tue, 1 Mar 2022 20:16:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S237826AbiCAUQk (ORCPT ); Tue, 1 Mar 2022 15:16:40 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51278 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S237837AbiCAUQK (ORCPT ); Tue, 1 Mar 2022 15:16:10 -0500 Received: from sin.source.kernel.org (sin.source.kernel.org [IPv6:2604:1380:40e1:4800::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DA34475E76; Tue, 1 Mar 2022 12:15:18 -0800 (PST) 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 sin.source.kernel.org (Postfix) with ESMTPS id C7BD5CE1A6D; Tue, 1 Mar 2022 20:15:16 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 93D32C340F2; Tue, 1 Mar 2022 20:15:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1646165715; bh=VO1C+e/5L5lf/6EQ/5yySf3EkTEEUGy03TlZvu8CiEk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=R+oqGcW45T2qhIKQaBroTOAiXIFU6ynm/atZEb7ApuJRAKAtiAuAgRZ/cR1D3wgoA xBNkXBDBtlDKK+3CAdBNvxRyeqpqCpvMgO3S9lr9olYBYw43t8ai6AcGc5YBYrjfin 6zkAY8fdzOtfASgqpFss8VHLWJvq4p16+UZNAxKx/IxasDAG4FbXDaywl2AMyts22I arxl0whkupXlRwWwe7ALjlCICXrv4Yz4SWCRkubpFguOmXlr3YuOjnpiZlIV5g1ifS jjUeRq2hdOTLr9cXtYIwnhQdqA2x9D/ZNmVCztHYxNH3TMvaXmpmpqVxJNnLjpBe1y s4lXtIa2xO2fQ== From: Sasha Levin To: linux-kernel@vger.kernel.org, stable@vger.kernel.org Cc: Vikash Chandola , Guenter Roeck , Sasha Levin , jdelvare@suse.com, linux-hwmon@vger.kernel.org Subject: [PATCH AUTOSEL 5.16 16/28] hwmon: (pmbus) Clear pmbus fault/warning bits after read Date: Tue, 1 Mar 2022 15:13:21 -0500 Message-Id: <20220301201344.18191-16-sashal@kernel.org> X-Mailer: git-send-email 2.34.1 In-Reply-To: <20220301201344.18191-1-sashal@kernel.org> References: <20220301201344.18191-1-sashal@kernel.org> MIME-Version: 1.0 X-stable: review X-Patchwork-Hint: Ignore Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Vikash Chandola [ Upstream commit 35f165f08950a876f1b95a61d79c93678fba2fd6 ] Almost all fault/warning bits in pmbus status registers remain set even after fault/warning condition are removed. As per pmbus specification these faults must be cleared by user. Modify hwmon behavior to clear fault/warning bit after fetching data if fault/warning bit was set. This allows to get fresh data in next read. Signed-off-by: Vikash Chandola Link: https://lore.kernel.org/r/20220222131253.2426834-1-vikash.chandola@linux.intel.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- drivers/hwmon/pmbus/pmbus_core.c | 5 +++++ 1 file changed, 5 insertions(+) diff --git a/drivers/hwmon/pmbus/pmbus_core.c b/drivers/hwmon/pmbus/pmbus_core.c index 776ee2237be20..ac2fbee1ba9c0 100644 --- a/drivers/hwmon/pmbus/pmbus_core.c +++ b/drivers/hwmon/pmbus/pmbus_core.c @@ -911,6 +911,11 @@ static int pmbus_get_boolean(struct i2c_client *client, struct pmbus_boolean *b, pmbus_update_sensor_data(client, s2); regval = status & mask; + if (regval) { + ret = pmbus_write_byte_data(client, page, reg, regval); + if (ret) + goto unlock; + } if (s1 && s2) { s64 v1, v2; -- 2.34.1