Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
Date:   Sat, 22 Jun 2019 10:21:17 +0100
From:   Jonathan Cameron <jic23@kernel.org>
To:     Olivier Moysan <olivier.moysan@st.com>
Cc:     <knaack.h@gmx.de>, <lars@metafoo.de>, <pmeerw@pmeerw.net>,
        <mcoquelin.stm32@gmail.com>, <alexandre.torgue@st.com>,
        <fabrice.gasnier@st.com>, <linux-iio@vger.kernel.org>,
        <linux-stm32@st-md-mailman.stormreply.com>,
        <linux-arm-kernel@lists.infradead.org>,
        <linux-kernel@vger.kernel.org>, <benjamin.gaignard@st.com>
Subject: Re: [PATCH 2/5] iio: adc: stm32-dfsdm: fix data type
Message-ID: <20190622102117.5289e1e2@archlinux>
In-Reply-To: <1560949431-22948-3-git-send-email-olivier.moysan@st.com>
References: <1560949431-22948-1-git-send-email-olivier.moysan@st.com>
        <1560949431-22948-3-git-send-email-olivier.moysan@st.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: 7bit
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

On Wed, 19 Jun 2019 15:03:48 +0200
Olivier Moysan <olivier.moysan@st.com> wrote:

> Fix the data type as DFSDM raw output is complements 2,
> 24bits left aligned in a 32-bit register.
> This change does not affect AUDIO path
> - Set data as signed for IIO (as for AUDIO)
> - Set 8 bit right shift for IIO.
> The 8 LSBs bits of data contains channel info and are masked.
> 
> Fixes: e2e6771c6462 ("IIO: ADC: add STM32 DFSDM sigma delta ADC support")
> 
> Signed-off-by: Olivier Moysan <olivier.moysan@st.com>
Applied to the togreg branch of iio.git and pushed out as testing
for the autobuilders to play with them.

Thanks,

Jonathan

> ---
>  drivers/iio/adc/stm32-dfsdm-adc.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/iio/adc/stm32-dfsdm-adc.c b/drivers/iio/adc/stm32-dfsdm-adc.c
> index cb596f104919..6b90a40882f2 100644
> --- a/drivers/iio/adc/stm32-dfsdm-adc.c
> +++ b/drivers/iio/adc/stm32-dfsdm-adc.c
> @@ -1365,11 +1365,11 @@ static int stm32_dfsdm_adc_chan_init_one(struct iio_dev *indio_dev,
>  					BIT(IIO_CHAN_INFO_SAMP_FREQ);
>  
>  	if (adc->dev_data->type == DFSDM_AUDIO) {
> -		ch->scan_type.sign = 's';
>  		ch->ext_info = dfsdm_adc_audio_ext_info;
>  	} else {
> -		ch->scan_type.sign = 'u';
> +		ch->scan_type.shift = 8;
>  	}
> +	ch->scan_type.sign = 's';
>  	ch->scan_type.realbits = 24;
>  	ch->scan_type.storagebits = 32;
>