linux-kernel - [PATCH] iio: adc: ad7173: fix setting ODR in probe

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Message-Id: <20250710-iio-adc-ad7173-fix-setting-odr-in-probe-v1-1-78a100fec998@baylibre.com>
Date: Thu, 10 Jul 2025 15:43:40 -0500
From: David Lechner <dlechner@...libre.com>
To: Michael Hennerich <Michael.Hennerich@...log.com>, 
 Jonathan Cameron <jic23@...nel.org>, 
 Nuno Sá <nuno.sa@...log.com>, 
 Andy Shevchenko <andy@...nel.org>, Dumitru Ceclan <mitrutzceclan@...il.com>
Cc: Jonathan Cameron <Jonathan.Cameron@...wei.com>, 
 linux-iio@...r.kernel.org, linux-kernel@...r.kernel.org, 
 David Lechner <dlechner@...libre.com>
Subject: [PATCH] iio: adc: ad7173: fix setting ODR in probe

Fix the setting of the ODR register value in the probe function for
AD7177. The AD7177 chip has a different ODR value after reset than the
other chips (0x7 vs. 0x0) and 0 is a reserved value on that chip.

The driver already has this information available in odr_start_value
and uses it when checking valid values when writing to the
sampling_frequency attribute, but failed to set the correct initial
value in the probe function.

Fixes: 37ae8381ccda ("iio: adc: ad7173: add support for additional models")
Signed-off-by: David Lechner <dlechner@...libre.com>
---
 drivers/iio/adc/ad7173.c | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/drivers/iio/adc/ad7173.c b/drivers/iio/adc/ad7173.c
index dd9fa35555c79ead5a1b88d1dc6cc3db122502be..ef074b41332ed912fb281c0903f6cc52077accb4 100644
--- a/drivers/iio/adc/ad7173.c
+++ b/drivers/iio/adc/ad7173.c
@@ -1574,6 +1574,7 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
 		chan_st_priv->cfg.bipolar = false;
 		chan_st_priv->cfg.input_buf = st->info->has_input_buf;
 		chan_st_priv->cfg.ref_sel = AD7173_SETUP_REF_SEL_INT_REF;
+		chan_st_priv->cfg.odr = st->info->odr_start_value;
 		chan_st_priv->cfg.openwire_comp_chan = -1;
 		st->adc_mode |= AD7173_ADC_MODE_REF_EN;
 		if (st->info->data_reg_only_16bit)
@@ -1640,7 +1641,7 @@ static int ad7173_fw_parse_channel_config(struct iio_dev *indio_dev)
 		chan->scan_index = chan_index;
 		chan->channel = ain[0];
 		chan_st_priv->cfg.input_buf = st->info->has_input_buf;
-		chan_st_priv->cfg.odr = 0;
+		chan_st_priv->cfg.odr = st->info->odr_start_value;
 		chan_st_priv->cfg.openwire_comp_chan = -1;
 
 		chan_st_priv->cfg.bipolar = fwnode_property_read_bool(child, "bipolar");

---
base-commit: f8f559752d573a051a984adda8d2d1464f92f954
change-id: 20250710-iio-adc-ad7173-fix-setting-odr-in-probe-915972070e8a

Best regards,
-- 
David Lechner <dlechner@...libre.com>