diff options
| -rw-r--r-- | drivers/iio/dac/Kconfig | 11 | ||||
| -rw-r--r-- | drivers/iio/dac/max517.c | 45 | ||||
| -rw-r--r-- | include/linux/iio/dac/max517.h | 2 |
3 files changed, 42 insertions, 16 deletions
diff --git a/drivers/iio/dac/Kconfig b/drivers/iio/dac/Kconfig index 2236ea22f98a..13471a76e5bf 100644 --- a/drivers/iio/dac/Kconfig +++ b/drivers/iio/dac/Kconfig @@ -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. diff --git a/drivers/iio/dac/max517.c b/drivers/iio/dac/max517.c index 9a82a7255ebb..5507b3970b4b 100644 --- a/drivers/iio/dac/max517.c +++ b/drivers/iio/dac/max517.c @@ -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"); diff --git a/include/linux/iio/dac/max517.h b/include/linux/iio/dac/max517.h index f6d1d252f08d..7668716cd73c 100644 --- a/include/linux/iio/dac/max517.h +++ b/include/linux/iio/dac/max517.h @@ -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_ */ |