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 X-Spam-Level: X-Spam-Status: No, score=-9.1 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,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 1DDACC43381 for ; Mon, 18 Feb 2019 14:00:54 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E236421902 for ; Mon, 18 Feb 2019 14:00:53 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550498454; bh=HVI//fsomnld8JQXlnbKmB2wC+Fss+w6K1L35+uVQtQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=T5bsiHopUZepcCScLusVrLDt+pNWMhI2WzSvkKKon5XY9mJhe0KQDlDaXt7GeC/zL 5Cy+bNRKQHcQ2oCXTK31rn4taVi8j4M5qFDBpbKGoVcmjxpjOSOKBFTVgsSDnTMXHA +GZttfqr4v6WNw4d9+r8r5ZQSpX9l5nczWrZfWn8= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2388936AbfBROAw (ORCPT ); Mon, 18 Feb 2019 09:00:52 -0500 Received: from mail.kernel.org ([198.145.29.99]:42106 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2388907AbfBROAr (ORCPT ); Mon, 18 Feb 2019 09:00:47 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 A5F28217D9; Mon, 18 Feb 2019 14:00:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1550498447; bh=HVI//fsomnld8JQXlnbKmB2wC+Fss+w6K1L35+uVQtQ=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=zpr1BpTxrhA6JHi+qaAGplns6fo0m8A3SL9uqNi69Yv0/Ao1VnOqxm1FwzWlCOBHw mLPeFdkj1SEZlTzw9PT0I63ASNnX4BAmyErH4j4wr2/5mPeWWbQbgEWXG+nT07rh0g Y1s/yStUejEsR9X4cIKDrTfu3FlKvAale8pVBu2M= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, Renato Lui Geh , Alexandru Ardelean , Jonathan Cameron , Sasha Levin Subject: [PATCH 4.4 012/143] staging: iio: ad7780: update voltage on read Date: Mon, 18 Feb 2019 14:42:20 +0100 Message-Id: <20190218133529.611315348@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20190218133529.099444112@linuxfoundation.org> References: <20190218133529.099444112@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.4-stable review patch. If anyone has any objections, please let me know. ------------------ [ Upstream commit 336650c785b62c3bea7c8cf6061c933a90241f67 ] The ad7780 driver previously did not read the correct device output, as it read an outdated value set at initialization. It now updates its voltage on read. Signed-off-by: Renato Lui Geh Acked-by: Alexandru Ardelean Signed-off-by: Jonathan Cameron Signed-off-by: Sasha Levin --- drivers/staging/iio/adc/ad7780.c | 6 +++++- 1 file changed, 5 insertions(+), 1 deletion(-) diff --git a/drivers/staging/iio/adc/ad7780.c b/drivers/staging/iio/adc/ad7780.c index 3abc7789237f..531338ea5eb4 100644 --- a/drivers/staging/iio/adc/ad7780.c +++ b/drivers/staging/iio/adc/ad7780.c @@ -90,12 +90,16 @@ static int ad7780_read_raw(struct iio_dev *indio_dev, long m) { struct ad7780_state *st = iio_priv(indio_dev); + int voltage_uv; switch (m) { case IIO_CHAN_INFO_RAW: return ad_sigma_delta_single_conversion(indio_dev, chan, val); case IIO_CHAN_INFO_SCALE: - *val = st->int_vref_mv * st->gain; + voltage_uv = regulator_get_voltage(st->reg); + if (voltage_uv < 0) + return voltage_uv; + *val = (voltage_uv / 1000) * st->gain; *val2 = chan->scan_type.realbits - 1; return IIO_VAL_FRACTIONAL_LOG2; case IIO_CHAN_INFO_OFFSET: -- 2.19.1