linux-kernel - [PATCH 4/7] iio: adc: adi-axi-adc: set data format

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Message-ID: <20240923101206.3753-5-antoniu.miclaus@analog.com>
Date: Mon, 23 Sep 2024 13:10:21 +0300
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: Jonathan Cameron <jic23@...nel.org>, Lars-Peter Clausen <lars@...afoo.de>,
        Michael Hennerich <Michael.Hennerich@...log.com>,
        Rob Herring
	<robh@...nel.org>,
        Krzysztof Kozlowski <krzk+dt@...nel.org>,
        Conor Dooley
	<conor+dt@...nel.org>, Nuno Sa <nuno.sa@...log.com>,
        Olivier Moysan
	<olivier.moysan@...s.st.com>,
        Uwe Kleine-König
	<ukleinek@...nel.org>,
        Andy Shevchenko <andy@...nel.org>,
        David Lechner
	<dlechner@...libre.com>,
        Marcelo Schmitt <marcelo.schmitt@...log.com>,
        Dumitru Ceclan <mitrutzceclan@...il.com>,
        João Paulo Gonçalves <joao.goncalves@...adex.com>,
        AngeloGioacchino Del Regno <angelogioacchino.delregno@...labora.com>,
        Alisa-Dariana Roman <alisadariana@...il.com>,
        Antoniu Miclaus
	<antoniu.miclaus@...log.com>,
        Marius Cristea <marius.cristea@...rochip.com>,
        Mike Looijmans <mike.looijmans@...ic.nl>,
        Sergiu Cuciurean
	<sergiu.cuciurean@...log.com>,
        Dragos Bogdan <dragos.bogdan@...log.com>, <linux-iio@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        <linux-pwm@...r.kernel.org>
Subject: [PATCH 4/7] iio: adc: adi-axi-adc: set data format

Add support for selecting the data format within the AXI ADC ip.

Signed-off-by: Antoniu Miclaus <antoniu.miclaus@...log.com>
---
 drivers/iio/adc/adi-axi-adc.c | 21 +++++++++++++++++++++
 1 file changed, 21 insertions(+)

diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index ff48f26e02a3..926a8902c621 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -45,6 +45,8 @@
 #define ADI_AXI_ADC_REG_CTRL			0x0044
 #define    ADI_AXI_ADC_CTRL_DDR_EDGESEL_MASK	BIT(1)
 
+#define ADI_AXI_ADC_REG_CNTRL_3			0x004c
+
 #define ADI_AXI_ADC_REG_DRP_STATUS		0x0074
 #define   ADI_AXI_ADC_DRP_LOCKED		BIT(17)
 
@@ -271,6 +273,24 @@ static int axi_adc_interface_type_get(struct iio_backend *back,
 	return 0;
 }
 
+static int axi_adc_data_size_set(struct iio_backend *back,
+				 ssize_t size)
+{
+	struct adi_axi_adc_state *st = iio_backend_get_priv(back);
+	unsigned int val;
+
+	if (size <= 20)
+		val = 0;
+	else if (size <= 24)
+		val = 1;
+	else if (size <= 32)
+		val = 3;
+	else
+		return -EINVAL;
+
+	return regmap_write(st->regmap, ADI_AXI_ADC_REG_CNTRL_3, val);
+}
+
 static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
 						 struct iio_dev *indio_dev)
 {
@@ -308,6 +328,7 @@ static const struct iio_backend_ops adi_axi_adc_generic = {
 	.test_pattern_set = axi_adc_test_pattern_set,
 	.chan_status = axi_adc_chan_status,
 	.interface_type_get = axi_adc_interface_type_get,
+	.data_size_set = axi_adc_data_size_set,
 };
 
 static int adi_axi_adc_probe(struct platform_device *pdev)
-- 
2.46.0