linux-kernel - [PATCH 2/2] staging: iio: adc: ad7192: Convert platform data to DT properties

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Date:   Fri, 15 Mar 2019 13:29:03 +0200
From:   Mircea Caprioru <mircea.caprioru@...log.com>
To:     <jic23@...nel.org>
CC:     <Michael.Hennerich@...log.com>, <stefan.popa@...log.com>,
        <lars@...afoo.de>, <gregkh@...uxfoundation.org>,
        <linux-kernel@...r.kernel.org>, <linux-iio@...r.kernel.org>,
        Mircea Caprioru <mircea.caprioru@...log.com>
Subject: [PATCH 2/2] staging: iio: adc: ad7192: Convert platform data to DT properties

This patch will remove platform data members and replace them with device
tree properties. These properties will be subject to further modifications
and probably replaced with other functionalities at some point in time.

Signed-off-by: Mircea Caprioru <mircea.caprioru@...log.com>
---
 drivers/staging/iio/adc/ad7192.c | 33 ++++++++++++++++++++------------
 drivers/staging/iio/adc/ad7192.h |  7 -------
 2 files changed, 21 insertions(+), 19 deletions(-)

diff --git a/drivers/staging/iio/adc/ad7192.c b/drivers/staging/iio/adc/ad7192.c
index 5c54ce380fa5..c56eaefbbe41 100644
--- a/drivers/staging/iio/adc/ad7192.c
+++ b/drivers/staging/iio/adc/ad7192.c
@@ -250,10 +250,11 @@ static int ad7192_of_clock_select(struct ad7192_state *st)
 	return clock_sel;
 }
 
-static int ad7192_setup(struct ad7192_state *st,
-			const struct ad7192_platform_data *pdata)
+static int ad7192_setup(struct ad7192_state *st, struct device_node *np)
 {
 	struct iio_dev *indio_dev = spi_get_drvdata(st->sd.spi);
+	bool rej60_en, sinc3_en, refin2_en, chop_en;
+	bool buf_en, bipolar, burnout_curr_en;
 	unsigned long long scale_uv;
 	int i, ret, id;
 
@@ -280,18 +281,22 @@ static int ad7192_setup(struct ad7192_state *st,
 
 	st->conf = AD7192_CONF_GAIN(0);
 
-	if (pdata->rej60_en)
+	rej60_en = of_property_read_bool(np, "adi,rejection-60-Hz-enable");
+	if (rej60_en)
 		st->mode |= AD7192_MODE_REJ60;
 
-	if (pdata->sinc3_en)
+	sinc3_en = of_property_read_bool(np, "adi,sinc3-filter-enable");
+	if (sinc3_en)
 		st->mode |= AD7192_MODE_SINC3;
 
-	if (pdata->refin2_en && st->devid != ID_AD7195)
+	refin2_en = of_property_read_bool(np, "adi,refin2-pins-enable");
+	if (refin2_en && st->devid != ID_AD7195)
 		st->conf |= AD7192_CONF_REFSEL;
 
-	if (pdata->chop_en) {
+	chop_en = of_property_read_bool(np, "adi,chop-enable");
+	if (chop_en) {
 		st->conf |= AD7192_CONF_CHOP;
-		if (pdata->sinc3_en)
+		if (sinc3_en)
 			st->f_order = 3; /* SINC 3rd order */
 		else
 			st->f_order = 4; /* SINC 4th order */
@@ -299,15 +304,19 @@ static int ad7192_setup(struct ad7192_state *st,
 		st->f_order = 1;
 	}
 
-	if (pdata->buf_en)
+	buf_en = of_property_read_bool(np, "adi,buffer-enable");
+	if (buf_en)
 		st->conf |= AD7192_CONF_BUF;
 
-	if (pdata->unipolar_en)
+	bipolar = of_property_read_bool(np, "bipolar");
+	if (!bipolar)
 		st->conf |= AD7192_CONF_UNIPOLAR;
 
-	if (pdata->burnout_curr_en && pdata->buf_en && !pdata->chop_en) {
+	burnout_curr_en = of_property_read_bool(np,
+						"adi,burnout-currents-enable");
+	if (burnout_curr_en && buf_en && !chop_en) {
 		st->conf |= AD7192_CONF_BURN;
-	} else if (pdata->burnout_curr_en) {
+	} else if (burnout_curr_en) {
 		dev_warn(&st->sd.spi->dev,
 			 "Can't enable burnout currents: see CHOP or buffer\n");
 	}
@@ -735,7 +744,7 @@ static int ad7192_probe(struct spi_device *spi)
 		}
 	}
 
-	ret = ad7192_setup(st, pdata);
+	ret = ad7192_setup(st, spi->dev.of_node);
 	if (ret)
 		goto error_disable_clk;
 
diff --git a/drivers/staging/iio/adc/ad7192.h b/drivers/staging/iio/adc/ad7192.h
index 3be3ee269ed5..aa3322c14e38 100644
--- a/drivers/staging/iio/adc/ad7192.h
+++ b/drivers/staging/iio/adc/ad7192.h
@@ -33,13 +33,6 @@
 
 struct ad7192_platform_data {
 	u16		vref_mv;
-	bool		refin2_en;
-	bool		rej60_en;
-	bool		sinc3_en;
-	bool		chop_en;
-	bool		buf_en;
-	bool		unipolar_en;
-	bool		burnout_curr_en;
 };
 
 #endif /* IIO_ADC_AD7192_H_ */
-- 
2.17.1