iio: max517: Add support for MAX520 and MAX521 chips. (a878a1a6) · Commits · 戴 / test

drivers/iio/dac/Kconfig

+8 −3

Original line number	Diff line number	Diff line
		@@ -143,11 +143,16 @@ config AD7303
		ad7303.

		config MAX517
		tristate "Maxim MAX517/518/519 DAC driver"
		tristate "Maxim MAX517/518/519/520/521 DAC driver"
		depends on I2C
		help
		If you say yes here you get support for the Maxim chips MAX517,
		MAX518 and MAX519 (I2C 8-Bit DACs with rail-to-rail outputs).
		If you say yes here you get support for the following Maxim chips
		(I2C 8-Bit DACs with rail-to-rail outputs):
		MAX517 - Single channel, single reference
		MAX518 - Dual channel, ref=Vdd
		MAX519 - Dual channel, dual reference
		MAX520 - Quad channel, quad reference
		MAX521 - Octal channel, independent ref for ch0-3, shared ref for ch4-7

		This driver can also be built as a module. If so, the module
		will be called max517.

drivers/iio/dac/max517.c

+33 −12

Original line number	Diff line number	Diff line
		@@ -39,11 +39,13 @@ enum max517_device_ids {
		ID_MAX517,
		ID_MAX518,
		ID_MAX519,
		ID_MAX520,
		ID_MAX521,
		};

		struct max517_data {
		struct i2c_client *client;
		unsigned short vref_mv[2];
		unsigned short vref_mv[8];
		};

		/*
		@@ -149,7 +151,13 @@ static const struct iio_info max517_info = {

		static const struct iio_chan_spec max517_channels[] = {
		MAX517_CHANNEL(0),
		MAX517_CHANNEL(1)
		MAX517_CHANNEL(1),
		MAX517_CHANNEL(2),
		MAX517_CHANNEL(3),
		MAX517_CHANNEL(4),
		MAX517_CHANNEL(5),
		MAX517_CHANNEL(6),
		MAX517_CHANNEL(7),
		};

		static int max517_probe(struct i2c_client *client,
		@@ -158,6 +166,7 @@ static int max517_probe(struct i2c_client *client,
		struct max517_data *data;
		struct iio_dev *indio_dev;
		struct max517_platform_data *platform_data = client->dev.platform_data;
		int chan;

		indio_dev = devm_iio_device_alloc(&client->dev, sizeof(*data));
		if (!indio_dev)
		@@ -169,11 +178,21 @@ static int max517_probe(struct i2c_client *client,
		/* establish that the iio_dev is a child of the i2c device */
		indio_dev->dev.parent = &client->dev;

		/* reduced channel set for MAX517 */
		if (id->driver_data == ID_MAX517)
		indio_dev->num_channels = 1;
		else
		switch (id->driver_data) {
		case ID_MAX521:
		indio_dev->num_channels = 8;
		break;
		case ID_MAX520:
		indio_dev->num_channels = 4;
		break;
		case ID_MAX519:
		case ID_MAX518:
		indio_dev->num_channels = 2;
		break;
		default: /* single channel for MAX517 */
		indio_dev->num_channels = 1;
		break;
		}
		indio_dev->channels = max517_channels;
		indio_dev->modes = INDIO_DIRECT_MODE;
		indio_dev->info = &max517_info;
		@@ -182,11 +201,11 @@ static int max517_probe(struct i2c_client *client,
		* Reference voltage on MAX518 and default is 5V, else take vref_mv
		* from platform_data
		*/
		if (id->driver_data == ID_MAX518 \|\| !platform_data) {
		data->vref_mv[0] = data->vref_mv[1] = 5000; /* mV */
		} else {
		data->vref_mv[0] = platform_data->vref_mv[0];
		data->vref_mv[1] = platform_data->vref_mv[1];
		for (chan = 0; chan < indio_dev->num_channels; chan++) {
		if (id->driver_data == ID_MAX518 \|\| !platform_data)
		data->vref_mv[chan] = 5000; /* mV */
		else
		data->vref_mv[chan] = platform_data->vref_mv[chan];
		}

		return iio_device_register(indio_dev);
		@@ -202,6 +221,8 @@ static const struct i2c_device_id max517_id[] = {
		{ "max517", ID_MAX517 },
		{ "max518", ID_MAX518 },
		{ "max519", ID_MAX519 },
		{ "max520", ID_MAX520 },
		{ "max521", ID_MAX521 },
		{ }
		};
		MODULE_DEVICE_TABLE(i2c, max517_id);
		@@ -218,5 +239,5 @@ static struct i2c_driver max517_driver = {
		module_i2c_driver(max517_driver);

		MODULE_AUTHOR("Roland Stigge <stigge@antcom.de>");
		MODULE_DESCRIPTION("MAX517/MAX518/MAX519 8-bit DAC");
		MODULE_DESCRIPTION("MAX517/518/519/520/521 8-bit DAC");
		MODULE_LICENSE("GPL");

include/linux/iio/dac/max517.h

+1 −1

Original line number	Diff line number	Diff line
		@@ -9,7 +9,7 @@
		#define IIO_DAC_MAX517_H_

		struct max517_platform_data {
		u16 vref_mv[2];
		u16 vref_mv[8];
		};

		#endif /* IIO_DAC_MAX517_H_ */

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