Author | Tokens | Token Proportion | Commits | Commit Proportion |
---|---|---|---|---|
Matt Ranostay | 766 | 98.84% | 4 | 80.00% |
Uwe Kleine-König | 9 | 1.16% | 1 | 20.00% |
Total | 775 | 5 |
// SPDX-License-Identifier: GPL-2.0+ /* * tpl0102.c - Support for Texas Instruments digital potentiometers * * Copyright (C) 2016, 2018 * Author: Matt Ranostay <matt.ranostay@konsulko.com> * * TODO: enable/disable hi-z output control */ #include <linux/module.h> #include <linux/i2c.h> #include <linux/regmap.h> #include <linux/iio/iio.h> struct tpl0102_cfg { int wipers; int avail[3]; int kohms; }; enum tpl0102_type { CAT5140_503, CAT5140_104, TPL0102_104, TPL0401_103, }; static const struct tpl0102_cfg tpl0102_cfg[] = { /* on-semiconductor parts */ [CAT5140_503] = { .wipers = 1, .avail = { 0, 1, 255 }, .kohms = 50, }, [CAT5140_104] = { .wipers = 1, .avail = { 0, 1, 255 }, .kohms = 100, }, /* ti parts */ [TPL0102_104] = { .wipers = 2, .avail = { 0, 1, 255 }, .kohms = 100 }, [TPL0401_103] = { .wipers = 1, .avail = { 0, 1, 127 }, .kohms = 10, }, }; struct tpl0102_data { struct regmap *regmap; const struct tpl0102_cfg *cfg; }; static const struct regmap_config tpl0102_regmap_config = { .reg_bits = 8, .val_bits = 8, }; #define TPL0102_CHANNEL(ch) { \ .type = IIO_RESISTANCE, \ .indexed = 1, \ .output = 1, \ .channel = (ch), \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ .info_mask_separate_available = BIT(IIO_CHAN_INFO_RAW), \ } static const struct iio_chan_spec tpl0102_channels[] = { TPL0102_CHANNEL(0), TPL0102_CHANNEL(1), }; static int tpl0102_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) { struct tpl0102_data *data = iio_priv(indio_dev); switch (mask) { case IIO_CHAN_INFO_RAW: { int ret = regmap_read(data->regmap, chan->channel, val); return ret ? ret : IIO_VAL_INT; } case IIO_CHAN_INFO_SCALE: *val = 1000 * data->cfg->kohms; *val2 = data->cfg->avail[2] + 1; return IIO_VAL_FRACTIONAL; } return -EINVAL; } static int tpl0102_read_avail(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, const int **vals, int *type, int *length, long mask) { struct tpl0102_data *data = iio_priv(indio_dev); switch (mask) { case IIO_CHAN_INFO_RAW: *length = ARRAY_SIZE(data->cfg->avail); *vals = data->cfg->avail; *type = IIO_VAL_INT; return IIO_AVAIL_RANGE; } return -EINVAL; } static int tpl0102_write_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int val, int val2, long mask) { struct tpl0102_data *data = iio_priv(indio_dev); if (mask != IIO_CHAN_INFO_RAW) return -EINVAL; if (val > data->cfg->avail[2] || val < 0) return -EINVAL; return regmap_write(data->regmap, chan->channel, val); } static const struct iio_info tpl0102_info = { .read_raw = tpl0102_read_raw, .read_avail = tpl0102_read_avail, .write_raw = tpl0102_write_raw, }; static int tpl0102_probe(struct i2c_client *client) { const struct i2c_device_id *id = i2c_client_get_device_id(client); struct device *dev = &client->dev; struct tpl0102_data *data; struct iio_dev *indio_dev; indio_dev = devm_iio_device_alloc(dev, sizeof(*data)); if (!indio_dev) return -ENOMEM; data = iio_priv(indio_dev); i2c_set_clientdata(client, indio_dev); data->cfg = &tpl0102_cfg[id->driver_data]; data->regmap = devm_regmap_init_i2c(client, &tpl0102_regmap_config); if (IS_ERR(data->regmap)) { dev_err(dev, "regmap initialization failed\n"); return PTR_ERR(data->regmap); } indio_dev->info = &tpl0102_info; indio_dev->channels = tpl0102_channels; indio_dev->num_channels = data->cfg->wipers; indio_dev->name = client->name; return devm_iio_device_register(dev, indio_dev); } static const struct i2c_device_id tpl0102_id[] = { { "cat5140-503", CAT5140_503 }, { "cat5140-104", CAT5140_104 }, { "tpl0102-104", TPL0102_104 }, { "tpl0401-103", TPL0401_103 }, {} }; MODULE_DEVICE_TABLE(i2c, tpl0102_id); static struct i2c_driver tpl0102_driver = { .driver = { .name = "tpl0102", }, .probe_new = tpl0102_probe, .id_table = tpl0102_id, }; module_i2c_driver(tpl0102_driver); MODULE_AUTHOR("Matt Ranostay <matt.ranostay@konsulko.com>"); MODULE_DESCRIPTION("TPL0102 digital potentiometer"); MODULE_LICENSE("GPL");
Information contained on this website is for historical information purposes only and does not indicate or represent copyright ownership.
Created with Cregit http://github.com/cregit/cregit
Version 2.0-RC1