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Message-ID: <20241018104210.51659-4-antoniu.miclaus@analog.com>
Date: Fri, 18 Oct 2024 13:42:08 +0300
From: Antoniu Miclaus <antoniu.miclaus@...log.com>
To: <jic23@...nel.org>, <robh@...nel.org>, <krzk+dt@...nel.org>,
<nuno.sa@...log.com>, <conor+dt@...nel.org>, <ukleinek@...nel.org>,
<dragos.bogdan@...log.com>, <linux-iio@...r.kernel.org>,
<devicetree@...r.kernel.org>, <linux-kernel@...r.kernel.org>,
<linux-pwm@...r.kernel.org>
CC: Antoniu Miclaus <antoniu.miclaus@...log.com>
Subject: [PATCH v4 4/6] 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>
---
changes in v4:
- update indentation to match the rest of the driver.
- shrink axi_adc_data_size_set in one line.
drivers/iio/adc/adi-axi-adc.c | 22 ++++++++++++++++++++++
1 file changed, 22 insertions(+)
diff --git a/drivers/iio/adc/adi-axi-adc.c b/drivers/iio/adc/adi-axi-adc.c
index ff48f26e02a3..57e56dbccc9a 100644
--- a/drivers/iio/adc/adi-axi-adc.c
+++ b/drivers/iio/adc/adi-axi-adc.c
@@ -45,6 +45,9 @@
#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_CNTRL_3_CUSTOM_CTRL_MSK GENMASK(7, 0)
+
#define ADI_AXI_ADC_REG_DRP_STATUS 0x0074
#define ADI_AXI_ADC_DRP_LOCKED BIT(17)
@@ -271,6 +274,24 @@ 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_update_bits(st->regmap, ADI_AXI_ADC_REG_CNTRL_3,
+ ADI_AXI_ADC_CNTRL_3_CUSTOM_CONTROL_MSK, val);
+}
+
static struct iio_buffer *axi_adc_request_buffer(struct iio_backend *back,
struct iio_dev *indio_dev)
{
@@ -308,6 +329,7 @@ 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)
--
2.46.2
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