diff options
Diffstat (limited to 'drivers/iio/dac/rohm-bd79703.c')
| -rw-r--r-- | drivers/iio/dac/rohm-bd79703.c | 116 |
1 files changed, 100 insertions, 16 deletions
diff --git a/drivers/iio/dac/rohm-bd79703.c b/drivers/iio/dac/rohm-bd79703.c index e998ab51052e..a35c37d2261d 100644 --- a/drivers/iio/dac/rohm-bd79703.c +++ b/drivers/iio/dac/rohm-bd79703.c @@ -38,11 +38,20 @@ static const struct regmap_config bd79703_regmap_config = { .cache_type = REGCACHE_RBTREE, }; +/* Dynamic driver private data */ struct bd79703_data { struct regmap *regmap; int vfs; }; +/* Static, IC type specific data for different variants */ +struct bd7970x_chip_data { + const char *name; + const struct iio_chan_spec *channels; + int num_channels; + bool has_vfs; +}; + static int bd79703_read_raw(struct iio_dev *idev, struct iio_chan_spec const *chan, int *val, int *val2, long mask) @@ -67,7 +76,7 @@ static int bd79703_write_raw(struct iio_dev *idev, if (val < 0 || val >= 1 << BD79703_DAC_BITS) return -EINVAL; - return regmap_write(data->regmap, chan->channel + 1, val); + return regmap_write(data->regmap, chan->address, val); }; static const struct iio_info bd79703_info = { @@ -75,16 +84,42 @@ static const struct iio_info bd79703_info = { .write_raw = bd79703_write_raw, }; -#define BD79703_CHAN(_chan) { \ +#define BD79703_CHAN_ADDR(_chan, _addr) { \ .type = IIO_VOLTAGE, \ .indexed = 1, \ .output = 1, \ .channel = (_chan), \ .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE), \ - .address = (_chan), \ + .address = (_addr), \ } +#define BD79703_CHAN(_chan) BD79703_CHAN_ADDR((_chan), (_chan) + 1) + +static const struct iio_chan_spec bd79700_channels[] = { + BD79703_CHAN(0), + BD79703_CHAN(1), +}; + +static const struct iio_chan_spec bd79701_channels[] = { + BD79703_CHAN(0), + BD79703_CHAN(1), + BD79703_CHAN(2), +}; + +/* + * The BD79702 has 4 channels. They aren't mapped to BD79703 channels 0, 1, 2 + * and 3, but to the channels 0, 1, 4, 5. So the addressing used with SPI + * accesses is 1, 2, 5 and 6 for them. Thus, they're not constant offset to + * the channel number as with other IC variants. + */ +static const struct iio_chan_spec bd79702_channels[] = { + BD79703_CHAN_ADDR(0, 1), + BD79703_CHAN_ADDR(1, 2), + BD79703_CHAN_ADDR(2, 5), + BD79703_CHAN_ADDR(3, 6), +}; + static const struct iio_chan_spec bd79703_channels[] = { BD79703_CHAN(0), BD79703_CHAN(1), @@ -94,13 +129,46 @@ static const struct iio_chan_spec bd79703_channels[] = { BD79703_CHAN(5), }; +static const struct bd7970x_chip_data bd79700_chip_data = { + .name = "bd79700", + .channels = bd79700_channels, + .num_channels = ARRAY_SIZE(bd79700_channels), + .has_vfs = false, +}; + +static const struct bd7970x_chip_data bd79701_chip_data = { + .name = "bd79701", + .channels = bd79701_channels, + .num_channels = ARRAY_SIZE(bd79701_channels), + .has_vfs = false, +}; + +static const struct bd7970x_chip_data bd79702_chip_data = { + .name = "bd79702", + .channels = bd79702_channels, + .num_channels = ARRAY_SIZE(bd79702_channels), + .has_vfs = true, +}; + +static const struct bd7970x_chip_data bd79703_chip_data = { + .name = "bd79703", + .channels = bd79703_channels, + .num_channels = ARRAY_SIZE(bd79703_channels), + .has_vfs = true, +}; + static int bd79703_probe(struct spi_device *spi) { + const struct bd7970x_chip_data *cd; struct device *dev = &spi->dev; struct bd79703_data *data; struct iio_dev *idev; int ret; + cd = spi_get_device_match_data(spi); + if (!cd) + return -ENODEV; + idev = devm_iio_device_alloc(dev, sizeof(*data)); if (!idev) return -ENOMEM; @@ -112,20 +180,30 @@ static int bd79703_probe(struct spi_device *spi) return dev_err_probe(dev, PTR_ERR(data->regmap), "Failed to initialize Regmap\n"); - ret = devm_regulator_get_enable(dev, "vcc"); - if (ret) - return dev_err_probe(dev, ret, "Failed to enable VCC\n"); - - ret = devm_regulator_get_enable_read_voltage(dev, "vfs"); - if (ret < 0) - return dev_err_probe(dev, ret, "Failed to get Vfs\n"); - + /* + * BD79703 has a separate VFS pin, whereas the BD79700 and BD79701 use + * VCC for their full-scale output voltage. + */ + if (cd->has_vfs) { + ret = devm_regulator_get_enable(dev, "vcc"); + if (ret) + return dev_err_probe(dev, ret, "Failed to enable VCC\n"); + + ret = devm_regulator_get_enable_read_voltage(dev, "vfs"); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to get Vfs\n"); + } else { + ret = devm_regulator_get_enable_read_voltage(dev, "vcc"); + if (ret < 0) + return dev_err_probe(dev, ret, "Failed to get VCC\n"); + } data->vfs = ret; - idev->channels = bd79703_channels; - idev->num_channels = ARRAY_SIZE(bd79703_channels); + + idev->channels = cd->channels; + idev->num_channels = cd->num_channels; idev->modes = INDIO_DIRECT_MODE; idev->info = &bd79703_info; - idev->name = "bd79703"; + idev->name = cd->name; /* Initialize all to output zero */ ret = regmap_write(data->regmap, BD79703_REG_OUT_ALL, 0); @@ -136,13 +214,19 @@ static int bd79703_probe(struct spi_device *spi) } static const struct spi_device_id bd79703_id[] = { - { "bd79703", }, + { "bd79700", (kernel_ulong_t)&bd79700_chip_data }, + { "bd79701", (kernel_ulong_t)&bd79701_chip_data }, + { "bd79702", (kernel_ulong_t)&bd79702_chip_data }, + { "bd79703", (kernel_ulong_t)&bd79703_chip_data }, { } }; MODULE_DEVICE_TABLE(spi, bd79703_id); static const struct of_device_id bd79703_of_match[] = { - { .compatible = "rohm,bd79703", }, + { .compatible = "rohm,bd79700", .data = &bd79700_chip_data }, + { .compatible = "rohm,bd79701", .data = &bd79701_chip_data }, + { .compatible = "rohm,bd79702", .data = &bd79702_chip_data }, + { .compatible = "rohm,bd79703", .data = &bd79703_chip_data }, { } }; MODULE_DEVICE_TABLE(of, bd79703_of_match); |