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From:   Greg Kroah-Hartman <gregkh@linuxfoundation.org>
To:     linux-kernel@vger.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        stable@vger.kernel.org, Dragos Bogdan <dragos.bogdan@analog.com>,
        Alexandru Ardelean <alexandru.ardelean@analog.com>,
        Stable@vger.kernel.org,
        Jonathan Cameron <Jonathan.Cameron@huawei.com>
Subject: [PATCH 4.9 20/44] iio: ad_sigma_delta: select channel when reading register
Date:   Wed, 24 Apr 2019 19:09:58 +0200
Message-Id: <20190424170854.224412452@linuxfoundation.org>
In-Reply-To: <20190424170839.924291114@linuxfoundation.org>
References: <20190424170839.924291114@linuxfoundation.org>
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From: Dragos Bogdan <dragos.bogdan@analog.com>

commit fccfb9ce70ed4ea7a145f77b86de62e38178517f upstream.

The desired channel has to be selected in order to correctly fill the
buffer with the corresponding data.
The `ad_sd_write_reg()` already does this, but for the
`ad_sd_read_reg_raw()` this was omitted.

Fixes: af3008485ea03 ("iio:adc: Add common code for ADI Sigma Delta devices")
Signed-off-by: Dragos Bogdan <dragos.bogdan@analog.com>
Signed-off-by: Alexandru Ardelean <alexandru.ardelean@analog.com>
Cc: <Stable@vger.kernel.org>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

---
 drivers/iio/adc/ad_sigma_delta.c |    1 +
 1 file changed, 1 insertion(+)

--- a/drivers/iio/adc/ad_sigma_delta.c
+++ b/drivers/iio/adc/ad_sigma_delta.c
@@ -121,6 +121,7 @@ static int ad_sd_read_reg_raw(struct ad_
 	if (sigma_delta->info->has_registers) {
 		data[0] = reg << sigma_delta->info->addr_shift;
 		data[0] |= sigma_delta->info->read_mask;
+		data[0] |= sigma_delta->comm;
 		spi_message_add_tail(&t[0], &m);
 	}
 	spi_message_add_tail(&t[1], &m);