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iio: amplifiers: hmc425a: Add Support HMC540S 4-bit Attenuator

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This adds support for the Analog Devices HMC540s 1 dB LSB
Silicon MMIC 4-Bit Digital Positive Control Attenuator, 0.1 - 8 GHz

Signed-off-by: Michael Hennerich <michael.hennerich@analog.com>
Signed-off-by: Ana-Maria Cusco <ana-maria.cusco@analog.com>
Link: https://lore.kernel.org/r/20230816110906.144540-1-ana-maria.cusco@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
This commit is contained in:
Michael Hennerich
2023-08-16 14:09:05 +03:00
committed by Jonathan Cameron
parent 711fb79a1e
commit 77865a8f9f
1 changed files with 17 additions and 0 deletions
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drivers/iio/amplifiers/hmc425a.c
+17
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@@ -21,6 +21,7 @@
enum hmc425a_type {
ID_HMC425A,
ID_HMC540S,
};
struct hmc425a_chip_info {
@@ -70,6 +71,9 @@ static int hmc425a_read_raw(struct iio_dev *indio_dev,
case ID_HMC425A:
gain = ~code * -500;
break;
case ID_HMC540S:
gain = ~code * -1000;
break;
}
*val = gain / 1000;
@@ -106,6 +110,9 @@ static int hmc425a_write_raw(struct iio_dev *indio_dev,
case ID_HMC425A:
code = ~((abs(gain) / 500) & 0x3F);
break;
case ID_HMC540S:
code = ~((abs(gain) / 1000) & 0xF);
break;
}
mutex_lock(&st->lock);
@@ -157,6 +164,7 @@ static const struct iio_chan_spec hmc425a_channels[] = {
/* Match table for of_platform binding */
static const struct of_device_id hmc425a_of_match[] = {
{ .compatible = "adi,hmc425a", .data = (void *)ID_HMC425A },
{ .compatible = "adi,hmc540s", .data = (void *)ID_HMC540S },
{},
};
MODULE_DEVICE_TABLE(of, hmc425a_of_match);
@@ -171,6 +179,15 @@ static struct hmc425a_chip_info hmc425a_chip_info_tbl[] = {
.gain_max = 0,
.default_gain = -0x40, /* set default gain -31.5db*/
},
[ID_HMC540S] = {
.name = "hmc540s",
.channels = hmc425a_channels,
.num_channels = ARRAY_SIZE(hmc425a_channels),
.num_gpios = 4,
.gain_min = -15000,
.gain_max = 0,
.default_gain = -0x10, /* set default gain -15.0db*/
},
};
static int hmc425a_probe(struct platform_device *pdev)