Commit 77865a8f authored by Michael Hennerich's avatar Michael Hennerich Committed by Jonathan Cameron
Browse files

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



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: default avatarMichael Hennerich <michael.hennerich@analog.com>
Signed-off-by: default avatarAna-Maria Cusco <ana-maria.cusco@analog.com>
Link: https://lore.kernel.org/r/20230816110906.144540-1-ana-maria.cusco@analog.com


Signed-off-by: default avatarJonathan Cameron <Jonathan.Cameron@huawei.com>
parent 711fb79a

drivers/iio/amplifiers/hmc425a.c

+17 −0
Original line number Diff line number Diff line
@@ -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)