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 23A72C433EF for ; Mon, 18 Apr 2022 19:21:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347668AbiDRTX7 (ORCPT ); Mon, 18 Apr 2022 15:23:59 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:44330 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347671AbiDRTX5 (ORCPT ); Mon, 18 Apr 2022 15:23:57 -0400 Received: from dfw.source.kernel.org (dfw.source.kernel.org [139.178.84.217]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id B852335862 for ; Mon, 18 Apr 2022 12:21:17 -0700 (PDT) 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 dfw.source.kernel.org (Postfix) with ESMTPS id 202FE60E9A for ; Mon, 18 Apr 2022 19:21:17 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id D00FAC385AA; Mon, 18 Apr 2022 19:21:14 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1650309676; bh=ikMVn+SMOgW3yNKey75lSpwVSFSGho5UFplLdRuXp78=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=g3EY/hmpdTi1F71d5d5SP0wMnNkS8S5xtuWXwpMuxe68hfdcdZrEP6N4W7UmG+LEK DoLxTfLfG7+g5ZciSicZOQOHloYDpez0nz4KkSYKZOTIp6f3/K4aOdcOZSfH7Qs49m EnpcOABXXCumZDTW9mPRGk4JtJaDLpkogtyJIZpTGndAm6ijwtvO/2RItm3hUXPZJ5 4+ELLAa3+s4Y0uYFhZAed9rPFkZsu2Z67NZ8hrBBKKbO7decc+53BAdQZO3LF4MbRt f408m1JlUpzrVnqidSonkmOB95IJCOSRJnjOSwkKWzWDId+Qp0lrUClZULFkEAi9yL Hkq2499UnIChA== From: Jonathan Cameron To: linux-iio@vger.kernel.org Cc: Michael Hennerich , Lars-Peter Clausen , Vincent Whitchurch , Jonathan Cameron Subject: [PATCH 04/17] staging: iio: cdc: ad7746: Push handling of supply voltage scale to userspace. Date: Mon, 18 Apr 2022 20:28:54 +0100 Message-Id: <20220418192907.763933-5-jic23@kernel.org> X-Mailer: git-send-email 2.35.3 In-Reply-To: <20220418192907.763933-1-jic23@kernel.org> References: <20220418192907.763933-1-jic23@kernel.org> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org From: Jonathan Cameron The supply voltage is attenuated by 6 before being fed to the ADC. Handle this explcitly rather than premultiplying the _raw value by 6. Signed-off-by: Jonathan Cameron --- drivers/staging/iio/cdc/ad7746.c | 16 ++++++---------- 1 file changed, 6 insertions(+), 10 deletions(-) diff --git a/drivers/staging/iio/cdc/ad7746.c b/drivers/staging/iio/cdc/ad7746.c index 1f510610ed32..1379caf88b83 100644 --- a/drivers/staging/iio/cdc/ad7746.c +++ b/drivers/staging/iio/cdc/ad7746.c @@ -114,9 +114,8 @@ static const struct iio_chan_spec ad7746_channels[] = { .type = IIO_VOLTAGE, .indexed = 1, .channel = 0, - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | - BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ), .address = AD7746_REG_VT_DATA_HIGH << 8 | AD7746_VTSETUP_VTMD_EXT_VIN, }, @@ -125,9 +124,8 @@ static const struct iio_chan_spec ad7746_channels[] = { .indexed = 1, .channel = 1, .extend_name = "supply", - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE) | - BIT(IIO_CHAN_INFO_SAMP_FREQ), + .info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE), + .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SAMP_FREQ), .address = AD7746_REG_VT_DATA_HIGH << 8 | AD7746_VTSETUP_VTMD_VDD_MON, }, @@ -559,10 +557,6 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, */ *val = (*val * 125) / 256; break; - case IIO_VOLTAGE: - if (chan->channel == 1) /* supply_raw*/ - *val = *val * 6; - break; default: break; } @@ -617,6 +611,8 @@ static int ad7746_read_raw(struct iio_dev *indio_dev, case IIO_VOLTAGE: /* 1170mV / 2^23 */ *val = 1170; + if (chan->channel == 1) + *val *= 6; *val2 = 23; ret = IIO_VAL_FRACTIONAL_LOG2; break; -- 2.35.3