From patchwork Thu Feb 27 13:34:50 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Greg KH X-Patchwork-Id: 230525 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=-6.8 required=3.0 tests=DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, 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 2A96DC3F345 for ; Thu, 27 Feb 2020 13:45:36 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E9E9B246A9 for ; Thu, 27 Feb 2020 13:45:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582811136; bh=TIjHdADiwkFjXfbpjDNPlSxovxMRHrZrzwi8QVZ2//w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=g/Nj07Vz3U2ogbNj2+OnbFLQ43P6AjRIoo4pRcUMKfNGyldgsygyru0PzJZ/Ldv/M zcWHemfKXGkJS43LavngvROvA0K1f3rXlRLiraJRR1nDBePOzflx1hApc9Gow/RDF1 Rkp0L/IfOh9f2yyR5x96/N2QYRXgyWFW2SGmzo7A= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729844AbgB0Npe (ORCPT ); Thu, 27 Feb 2020 08:45:34 -0500 Received: from mail.kernel.org ([198.145.29.99]:41524 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730387AbgB0Npd (ORCPT ); Thu, 27 Feb 2020 08:45:33 -0500 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 92AF321D7E; Thu, 27 Feb 2020 13:45:32 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1582811133; bh=TIjHdADiwkFjXfbpjDNPlSxovxMRHrZrzwi8QVZ2//w=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=HL2XC2XxsjWOcUFfkDP2iYTlXESf+Xjn31JJwOuY1l5+UKLOAgx37lW/hVGvaVjJK F/Vm72ygNV4bZ4rTuLnA52DEg4yDwmlqOo2gSCfMv6wtiROk6yckB+YCBX9vX+WWJX hn8bMwfKxFh1zYK+9Q2VSv8lrm9eqQah8dDDksr0= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Mike Jones , Guenter Roeck Subject: [PATCH 4.9 016/165] hwmon: (pmbus/ltc2978) Fix PMBus polling of MFR_COMMON definitions. Date: Thu, 27 Feb 2020 14:34:50 +0100 Message-Id: <20200227132233.385054696@linuxfoundation.org> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200227132230.840899170@linuxfoundation.org> References: <20200227132230.840899170@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org From: Mike Jones commit cf2b012c90e74e85d8aea7d67e48868069cfee0c upstream. Change 21537dc driver PMBus polling of MFR_COMMON from bits 5/4 to bits 6/5. This fixs a LTC297X family bug where polling always returns not busy even when the part is busy. This fixes a LTC388X and LTM467X bug where polling used PEND and NOT_IN_TRANS, and BUSY was not polled, which can lead to NACKing of commands. LTC388X and LTM467X modules now poll BUSY and PEND, increasing reliability by eliminating NACKing of commands. Signed-off-by: Mike Jones Link: https://lore.kernel.org/r/1580234400-2829-2-git-send-email-michael-a1.jones@analog.com Fixes: e04d1ce9bbb49 ("hwmon: (ltc2978) Add polling for chips requiring it") Signed-off-by: Guenter Roeck Signed-off-by: Greg Kroah-Hartman --- drivers/hwmon/pmbus/ltc2978.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/drivers/hwmon/pmbus/ltc2978.c +++ b/drivers/hwmon/pmbus/ltc2978.c @@ -89,8 +89,8 @@ enum chips { ltc2974, ltc2975, ltc2977, #define LTC_POLL_TIMEOUT 100 /* in milli-seconds */ -#define LTC_NOT_BUSY BIT(5) -#define LTC_NOT_PENDING BIT(4) +#define LTC_NOT_BUSY BIT(6) +#define LTC_NOT_PENDING BIT(5) /* * LTC2978 clears peak data whenever the CLEAR_FAULTS command is executed, which