diff options
Diffstat (limited to 'drivers/iio/adc/mcp3422.c')
| -rw-r--r-- | drivers/iio/adc/mcp3422.c | 42 |
1 files changed, 29 insertions, 13 deletions
diff --git a/drivers/iio/adc/mcp3422.c b/drivers/iio/adc/mcp3422.c index c8c1baaec6c..51672256072 100644 --- a/drivers/iio/adc/mcp3422.c +++ b/drivers/iio/adc/mcp3422.c @@ -1,10 +1,11 @@ /* - * mcp3422.c - driver for the Microchip mcp3422/3/4 chip family + * mcp3422.c - driver for the Microchip mcp3422/3/4/6/7/8 chip family * * Copyright (C) 2013, Angelo Compagnucci * Author: Angelo Compagnucci <angelo.compagnucci@gmail.com> * * Datasheet: http://ww1.microchip.com/downloads/en/devicedoc/22088b.pdf + * http://ww1.microchip.com/downloads/en/DeviceDoc/22226a.pdf * * This driver exports the value of analog input voltage to sysfs, the * voltage unit is nV. @@ -96,6 +97,7 @@ static const int mcp3422_sign_extend[4] = { /* Client data (each client gets its own) */ struct mcp3422 { struct i2c_client *i2c; + u8 id; u8 config; u8 pga[4]; struct mutex lock; @@ -238,6 +240,8 @@ static int mcp3422_write_raw(struct iio_dev *iio, temp = MCP3422_SRATE_15; break; case 3: + if (adc->id > 4) + return -EINVAL; temp = MCP3422_SRATE_3; break; default: @@ -271,6 +275,17 @@ static int mcp3422_write_raw_get_fmt(struct iio_dev *indio_dev, } } +static ssize_t mcp3422_show_samp_freqs(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct mcp3422 *adc = iio_priv(dev_to_iio_dev(dev)); + + if (adc->id > 4) + return sprintf(buf, "240 60 15\n"); + + return sprintf(buf, "240 60 15 3\n"); +} + static ssize_t mcp3422_show_scales(struct device *dev, struct device_attribute *attr, char *buf) { @@ -284,12 +299,13 @@ static ssize_t mcp3422_show_scales(struct device *dev, mcp3422_scales[sample_rate][3]); } -static IIO_CONST_ATTR_SAMP_FREQ_AVAIL("240 60 15 3"); +static IIO_DEVICE_ATTR(sampling_frequency_available, S_IRUGO, + mcp3422_show_samp_freqs, NULL, 0); static IIO_DEVICE_ATTR(in_voltage_scale_available, S_IRUGO, mcp3422_show_scales, NULL, 0); static struct attribute *mcp3422_attributes[] = { - &iio_const_attr_sampling_frequency_available.dev_attr.attr, + &iio_dev_attr_sampling_frequency_available.dev_attr.attr, &iio_dev_attr_in_voltage_scale_available.dev_attr.attr, NULL, }; @@ -335,6 +351,7 @@ static int mcp3422_probe(struct i2c_client *client, adc = iio_priv(indio_dev); adc->i2c = client; + adc->id = (u8)(id->driver_data); mutex_init(&adc->lock); @@ -343,13 +360,16 @@ static int mcp3422_probe(struct i2c_client *client, indio_dev->modes = INDIO_DIRECT_MODE; indio_dev->info = &mcp3422_info; - switch ((unsigned int)(id->driver_data)) { + switch (adc->id) { case 2: case 3: + case 6: + case 7: indio_dev->channels = mcp3422_channels; indio_dev->num_channels = ARRAY_SIZE(mcp3422_channels); break; case 4: + case 8: indio_dev->channels = mcp3424_channels; indio_dev->num_channels = ARRAY_SIZE(mcp3424_channels); break; @@ -362,7 +382,7 @@ static int mcp3422_probe(struct i2c_client *client, | MCP3422_SAMPLE_RATE_VALUE(MCP3422_SRATE_240)); mcp3422_update_config(adc, config); - err = iio_device_register(indio_dev); + err = devm_iio_device_register(&client->dev, indio_dev); if (err < 0) return err; @@ -371,16 +391,13 @@ static int mcp3422_probe(struct i2c_client *client, return 0; } -static int mcp3422_remove(struct i2c_client *client) -{ - iio_device_unregister(i2c_get_clientdata(client)); - return 0; -} - static const struct i2c_device_id mcp3422_id[] = { { "mcp3422", 2 }, { "mcp3423", 3 }, { "mcp3424", 4 }, + { "mcp3426", 6 }, + { "mcp3427", 7 }, + { "mcp3428", 8 }, { } }; MODULE_DEVICE_TABLE(i2c, mcp3422_id); @@ -400,11 +417,10 @@ static struct i2c_driver mcp3422_driver = { .of_match_table = of_match_ptr(mcp3422_of_match), }, .probe = mcp3422_probe, - .remove = mcp3422_remove, .id_table = mcp3422_id, }; module_i2c_driver(mcp3422_driver); MODULE_AUTHOR("Angelo Compagnucci <angelo.compagnucci@gmail.com>"); -MODULE_DESCRIPTION("Microchip mcp3422/3/4 driver"); +MODULE_DESCRIPTION("Microchip mcp3422/3/4/6/7/8 driver"); MODULE_LICENSE("GPL v2"); |