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 7AF74B676; Mon, 23 Jun 2025 21:46:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=10.30.226.201 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750715203; cv=none; b=HDMbUODaBSkSpWPjQrd6uZY1CUiv3v8yGjiJHO+pOfVijD+hONFDV/P3kEP743ZgiHpYy2uS4oyVITtQRlW8t5P7FXAf6dze2GLjZbNpuM+poyNj9v9a5SuqjdpsVrP8/vbeeqyel2DqKlf+dvS0JH01cuCQxQPeF8NjmY3y/1k= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1750715203; c=relaxed/simple; bh=R0s5szOeZKy92VMZm+RSLJoH7AwfPpQpOsjW4azaSHo=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version:Content-Type; b=E2u9cUsD2dmtXvju/RyHtwDr1LhLsA46OzhUFfknLlQ1PWN5gOzeXciIXy2HdAzyAELqYLiPFK2yPIfqC8MMj76fWGEFawAe8TBU7Z65clysjuB9Sy4Cj0IpgyGVqVd2Iguwr96yudQuLiaLqMqgari99HtVKutc5Cxn2dA3BjA= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b=JJfyDs/S; arc=none smtp.client-ip=10.30.226.201 Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=linuxfoundation.org header.i=@linuxfoundation.org header.b="JJfyDs/S" Received: by smtp.kernel.org (Postfix) with ESMTPSA id 129CBC4CEEA; Mon, 23 Jun 2025 21:46:42 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linuxfoundation.org; s=korg; t=1750715203; bh=R0s5szOeZKy92VMZm+RSLJoH7AwfPpQpOsjW4azaSHo=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=JJfyDs/Seo0S1y2JnlreIaKSIwFYAwzdhjW4wWRMNBL2yxPCrmLf4CmRgXfFqDEa8 bTxf4dogfBcMaIV90d0tdSf/DywI9TV1HZk1fMe76EDh4UDlSbcgcdRJnjRUj4OULy iu/RNvh/AYAEzHCG35T9c6IZOEBfeVtS+m+IrF2c= From: Greg Kroah-Hartman To: stable@vger.kernel.org Cc: Greg Kroah-Hartman , patches@lists.linux.dev, Sean Nyekjaer , Jean-Baptiste Maneyrol , Stable@vger.kernel.org, Jonathan Cameron Subject: [PATCH 5.15 259/411] iio: imu: inv_icm42600: Fix temperature calculation Date: Mon, 23 Jun 2025 15:06:43 +0200 Message-ID: <20250623130640.169924248@linuxfoundation.org> X-Mailer: git-send-email 2.50.0 In-Reply-To: <20250623130632.993849527@linuxfoundation.org> References: <20250623130632.993849527@linuxfoundation.org> User-Agent: quilt/0.68 X-stable: review X-Patchwork-Hint: ignore Precedence: bulk X-Mailing-List: stable@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit 5.15-stable review patch. If anyone has any objections, please let me know. ------------------ From: Sean Nyekjaer commit e2f820014239df9360064079ae93f838ff3b7f8c upstream. >>From the documentation: "offset to be added to [Y]_raw prior toscaling by [Y]_scale" Offset should be applied before multiplying scale, so divide offset by scale to make this correct. Fixes: bc3eb0207fb5 ("iio: imu: inv_icm42600: add temperature sensor support") Signed-off-by: Sean Nyekjaer Acked-by: Jean-Baptiste Maneyrol Link: https://patch.msgid.link/20250502-imu-v1-1-129b8391a4e3@geanix.com Cc: Signed-off-by: Jonathan Cameron Signed-off-by: Greg Kroah-Hartman --- drivers/iio/imu/inv_icm42600/inv_icm42600_temp.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) --- a/drivers/iio/imu/inv_icm42600/inv_icm42600_temp.c +++ b/drivers/iio/imu/inv_icm42600/inv_icm42600_temp.c @@ -67,16 +67,18 @@ int inv_icm42600_temp_read_raw(struct ii return IIO_VAL_INT; /* * T°C = (temp / 132.48) + 25 - * Tm°C = 1000 * ((temp * 100 / 13248) + 25) + * Tm°C = 1000 * ((temp / 132.48) + 25) + * Tm°C = 7.548309 * temp + 25000 + * Tm°C = (temp + 3312) * 7.548309 * scale: 100000 / 13248 ~= 7.548309 - * offset: 25000 + * offset: 3312 */ case IIO_CHAN_INFO_SCALE: *val = 7; *val2 = 548309; return IIO_VAL_INT_PLUS_MICRO; case IIO_CHAN_INFO_OFFSET: - *val = 25000; + *val = 3312; return IIO_VAL_INT; default: return -EINVAL;