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=-15.5 required=3.0 tests=BAYES_00,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,USER_AGENT_SANE_2 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 EDF08C433FE for ; Sun, 13 Dec 2020 16:56:31 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9CF4223121 for ; Sun, 13 Dec 2020 16:56:31 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726531AbgLMQ4P (ORCPT ); Sun, 13 Dec 2020 11:56:15 -0500 Received: from mail.kernel.org ([198.145.29.99]:58194 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726442AbgLMQ4P (ORCPT ); Sun, 13 Dec 2020 11:56:15 -0500 Received: from archlinux (cpc108967-cmbg20-2-0-cust86.5-4.cable.virginm.net [81.101.6.87]) (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 C04F323121; Sun, 13 Dec 2020 16:55:33 +0000 (UTC) Date: Sun, 13 Dec 2020 16:55:30 +0000 From: Jonathan Cameron To: Lars-Peter Clausen Cc: Peter Meerwald-Stadler , Alexandru Ardelean , linux-iio@vger.kernel.org Subject: Re: [PATCH] iio: ad5504: Fix setting power-down state Message-ID: <20201213165530.18dce485@archlinux> In-Reply-To: <20201209104649.5794-1-lars@metafoo.de> References: <20201209104649.5794-1-lars@metafoo.de> X-Mailer: Claws Mail 3.17.8 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-iio@vger.kernel.org On Wed, 9 Dec 2020 11:46:49 +0100 Lars-Peter Clausen wrote: > The power-down mask of the ad5504 is actually a power-up mask. Meaning if > a bit is set the corresponding channel is powered up and if it is not set > the channel is powered down. > > The driver currently has this the wrong way around, resulting in the > channel being powered up when requested to be powered down and vice versa. > > Fixes: 3bbbf150ffde ("staging:iio:dac:ad5504: Use strtobool for boolean values") > Signed-off-by: Lars-Peter Clausen > --- > Stumbled upon this while looking at something else. It is untested, but I > think it should be right. Alex can you double check? I read the datasheet as saying this fix is right but will wait for a confirmation from Alex. Thanks, Jonathan > --- > drivers/iio/dac/ad5504.c | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/drivers/iio/dac/ad5504.c b/drivers/iio/dac/ad5504.c > index 28921b62e642..e9297c25d4ef 100644 > --- a/drivers/iio/dac/ad5504.c > +++ b/drivers/iio/dac/ad5504.c > @@ -187,9 +187,9 @@ static ssize_t ad5504_write_dac_powerdown(struct iio_dev *indio_dev, > return ret; > > if (pwr_down) > - st->pwr_down_mask |= (1 << chan->channel); > - else > st->pwr_down_mask &= ~(1 << chan->channel); > + else > + st->pwr_down_mask |= (1 << chan->channel); > > ret = ad5504_spi_write(st, AD5504_ADDR_CTRL, > AD5504_DAC_PWRDWN_MODE(st->pwr_down_mode) |