From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from smtp.kernel.org (aws-us-west-2-korg-mail-1.web.codeaurora.org [10.30.226.201]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id C17FE15C83 for ; Mon, 5 Dec 2022 19:23:30 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 43501C433D6; Mon, 5 Dec 2022 19:23:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1670268210; bh=fnhSODLAcno3KqncfRPfQJNekfLDBy7vnQmC5+sxIUk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=PM9F/YROLwIBnSCwzpjMhbHA+rlWOM00MhfxHjo4UAOQMhkiF4sBGpT0uwIKGwHeO Ig8hggvwPeDAqjSHrCjt9PPoZQFR2WdGqST28RCCVo/ZOhlCdRcr5oweVGprAbbc4v FaUDOaoMIm09bB11A7IivIHmcXvx/1jDZZu27vc0= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Derek Nguyen , Brandon Maier , Guenter Roeck , Sasha Levin Subject: [PATCH 6.0 020/124] hwmon: (ltc2947) fix temperature scaling Date: Mon, 5 Dec 2022 20:08:46 +0100 Message-Id: <20221205190809.025437319@linuxfoundation.org> X-Mailer: git-send-email 2.38.1 In-Reply-To: <20221205190808.422385173@linuxfoundation.org> References: <20221205190808.422385173@linuxfoundation.org> User-Agent: quilt/0.67 Precedence: bulk X-Mailing-List: patches@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit From: Derek Nguyen [ Upstream commit 07e06193ead86d4812f431b4d87bbd4161222e3f ] The LTC2947 datasheet (Rev. B) calls out in the section "Register Description: Non-Accumulated Result Registers" (pg. 30) that "To calculate temperature, multiply the TEMP register value by 0.204°C and add 5.5°C". Fix to add 5.5C and not 0.55C. Fixes: 9f90fd652bed ("hwmon: Add support for ltc2947") Signed-off-by: Derek Nguyen Signed-off-by: Brandon Maier Link: https://lore.kernel.org/r/20221110192108.20624-1-brandon.maier@collins.com Signed-off-by: Guenter Roeck Signed-off-by: Sasha Levin --- drivers/hwmon/ltc2947-core.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/hwmon/ltc2947-core.c b/drivers/hwmon/ltc2947-core.c index 5423466de697..e918490f3ff7 100644 --- a/drivers/hwmon/ltc2947-core.c +++ b/drivers/hwmon/ltc2947-core.c @@ -396,7 +396,7 @@ static int ltc2947_read_temp(struct device *dev, const u32 attr, long *val, return ret; /* in milidegrees celcius, temp is given by: */ - *val = (__val * 204) + 550; + *val = (__val * 204) + 5500; return 0; } -- 2.35.1