From: Ana-Maria Cusco <ana-maria.cusco@xxxxxxxxxx>
This adds support for the Analog Devices ADRF5740 2 dB LSB, 4-Bit,
Silicon Digital Attenuator, 10 MHz to 60 GHz
Signed-off-by: Ana-Maria Cusco <ana-maria.cusco@xxxxxxxxxx>
---
drivers/iio/amplifiers/hmc425a.c | 23 +++++++++++++++++++++++
1 file changed, 23 insertions(+)
diff --git a/drivers/iio/amplifiers/hmc425a.c b/drivers/iio/amplifiers/hmc425a.c
index e87d35d50a95..ed4d72922696 100644
--- a/drivers/iio/amplifiers/hmc425a.c
+++ b/drivers/iio/amplifiers/hmc425a.c
@@ -5,6 +5,7 @@
* Copyright 2020 Analog Devices Inc.
*/
+#include <linux/bitops.h>
#include <linux/device.h>
#include <linux/err.h>
#include <linux/gpio/consumer.h>
@@ -22,6 +23,7 @@
enum hmc425a_type {
ID_HMC425A,
ID_HMC540S,
+ ID_ADRF5740
};
struct hmc425a_chip_info {
@@ -74,6 +76,10 @@ static int hmc425a_read_raw(struct iio_dev *indio_dev,
case ID_HMC540S:
gain = ~code * -1000;
break;
+ case ID_ADRF5740:
+ code = code & BIT(3) ? code & ~BIT(2) : code;
+ gain = code * -2000;
+ break;
}
*val = gain / 1000;
@@ -113,6 +119,10 @@ static int hmc425a_write_raw(struct iio_dev *indio_dev,
case ID_HMC540S:
code = ~((abs(gain) / 1000) & 0xF);
break;
+ case ID_ADRF5740:
+ code = (abs(gain) / 2000) & 0xF;
+ code = code & BIT(3) ? code | BIT(2) : code;
+ break;
}
mutex_lock(&st->lock);
@@ -165,6 +175,7 @@ static const struct iio_chan_spec hmc425a_channels[] = {
static const struct of_device_id hmc425a_of_match[] = {
{ .compatible = "adi,hmc425a", .data = (void *)ID_HMC425A },
{ .compatible = "adi,hmc540s", .data = (void *)ID_HMC540S },
+ { .compatible = "adi,adrf5740", .data = (void *)ID_ADRF5740 },
{},
};
MODULE_DEVICE_TABLE(of, hmc425a_of_match);
@@ -188,6 +199,15 @@ static struct hmc425a_chip_info hmc425a_chip_info_tbl[] = {
.gain_max = 0,
.default_gain = -0x10, /* set default gain -15.0db*/
},
+ [ID_ADRF5740] = {
+ .name = "adrf5740",
+ .channels = hmc425a_channels,
+ .num_channels = ARRAY_SIZE(hmc425a_channels),
+ .num_gpios = 4,
+ .gain_min = -22000,
+ .gain_max = 0,
+ .default_gain = 0xF, /* set default gain -22.0db*/
+ },
};
static int hmc425a_probe(struct platform_device *pdev)
@@ -229,6 +249,9 @@ static int hmc425a_probe(struct platform_device *pdev)
indio_dev->info = &hmc425a_info;
indio_dev->modes = INDIO_DIRECT_MODE;
+ /* Set default gain */
+ hmc425a_write(indio_dev, st->gain);
+
return devm_iio_device_register(&pdev->dev, indio_dev);
}
--
2.34.1
