diff options
Diffstat (limited to 'drivers/iio/adc/ad7606.c')
| -rw-r--r-- | drivers/iio/adc/ad7606.c | 100 |
1 files changed, 57 insertions, 43 deletions
diff --git a/drivers/iio/adc/ad7606.c b/drivers/iio/adc/ad7606.c index aba0fd123a51..f5ba94c03a8d 100644 --- a/drivers/iio/adc/ad7606.c +++ b/drivers/iio/adc/ad7606.c @@ -35,6 +35,11 @@ static const unsigned int ad7606_scale_avail[2] = { 152588, 305176 }; + +static const unsigned int ad7616_sw_scale_avail[3] = { + 76293, 152588, 305176 +}; + static const unsigned int ad7606_oversampling_avail[7] = { 1, 2, 4, 8, 16, 32, 64, }; @@ -55,6 +60,29 @@ static int ad7606_reset(struct ad7606_state *st) return -ENODEV; } +static int ad7606_reg_access(struct iio_dev *indio_dev, + unsigned int reg, + unsigned int writeval, + unsigned int *readval) +{ + struct ad7606_state *st = iio_priv(indio_dev); + int ret; + + mutex_lock(&st->lock); + if (readval) { + ret = st->bops->reg_read(st, reg); + if (ret < 0) + goto err_unlock; + *readval = ret; + ret = 0; + } else { + ret = st->bops->reg_write(st, reg, writeval); + } +err_unlock: + mutex_unlock(&st->lock); + return ret; +} + static int ad7606_read_samples(struct ad7606_state *st) { unsigned int num = st->chip_info->num_channels; @@ -308,29 +336,6 @@ static const struct attribute_group ad7606_attribute_group_range = { .attrs = ad7606_attributes_range, }; -#define AD760X_CHANNEL(num, mask) { \ - .type = IIO_VOLTAGE, \ - .indexed = 1, \ - .channel = num, \ - .address = num, \ - .info_mask_separate = BIT(IIO_CHAN_INFO_RAW), \ - .info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE),\ - .info_mask_shared_by_all = mask, \ - .scan_index = num, \ - .scan_type = { \ - .sign = 's', \ - .realbits = 16, \ - .storagebits = 16, \ - .endianness = IIO_CPU, \ - }, \ -} - -#define AD7605_CHANNEL(num) \ - AD760X_CHANNEL(num, 0) - -#define AD7606_CHANNEL(num) \ - AD760X_CHANNEL(num, BIT(IIO_CHAN_INFO_OVERSAMPLING_RATIO)) - static const struct iio_chan_spec ad7605_channels[] = { IIO_CHAN_SOFT_TIMESTAMP(4), AD7605_CHANNEL(0), @@ -405,12 +410,19 @@ static const struct ad7606_chip_info ad7606_chip_info_tbl[] = { .oversampling_avail = ad7606_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), }, + [ID_AD7606B] = { + .channels = ad7606_channels, + .num_channels = 9, + .oversampling_avail = ad7606_oversampling_avail, + .oversampling_num = ARRAY_SIZE(ad7606_oversampling_avail), + }, [ID_AD7616] = { .channels = ad7616_channels, .num_channels = 17, .oversampling_avail = ad7616_oversampling_avail, .oversampling_num = ARRAY_SIZE(ad7616_oversampling_avail), .os_req_reset = true, + .init_delay_ms = 15, }, }; @@ -519,6 +531,14 @@ static const struct iio_info ad7606_info_os_and_range = { .validate_trigger = &ad7606_validate_trigger, }; +static const struct iio_info ad7606_info_os_range_and_debug = { + .read_raw = &ad7606_read_raw, + .write_raw = &ad7606_write_raw, + .debugfs_reg_access = &ad7606_reg_access, + .attrs = &ad7606_attribute_group_os_and_range, + .validate_trigger = &ad7606_validate_trigger, +}; + static const struct iio_info ad7606_info_os = { .read_raw = &ad7606_read_raw, .write_raw = &ad7606_write_raw, @@ -617,35 +637,29 @@ int ad7606_probe(struct device *dev, int irq, void __iomem *base_address, if (ret) dev_warn(st->dev, "failed to RESET: no RESET GPIO specified\n"); + /* AD7616 requires al least 15ms to reconfigure after a reset */ + if (st->chip_info->init_delay_ms) { + if (msleep_interruptible(st->chip_info->init_delay_ms)) + return -ERESTARTSYS; + } + st->write_scale = ad7606_write_scale_hw; st->write_os = ad7606_write_os_hw; - if (st->chip_info->sw_mode_config) + if (st->bops->sw_mode_config) st->sw_mode_en = device_property_present(st->dev, "adi,sw-mode"); if (st->sw_mode_en) { + /* Scale of 0.076293 is only available in sw mode */ + st->scale_avail = ad7616_sw_scale_avail; + st->num_scales = ARRAY_SIZE(ad7616_sw_scale_avail); + /* After reset, in software mode, ±10 V is set by default */ memset32(st->range, 2, ARRAY_SIZE(st->range)); - indio_dev->info = &ad7606_info_os_and_range; - - /* - * In software mode, the range gpio has no longer its function. - * Instead, the scale can be configured individually for each - * channel from the range registers. - */ - if (st->chip_info->write_scale_sw) - st->write_scale = st->chip_info->write_scale_sw; - - /* - * In software mode, the oversampling is no longer configured - * with GPIO pins. Instead, the oversampling can be configured - * in configuratiion register. - */ - if (st->chip_info->write_os_sw) - st->write_os = st->chip_info->write_os_sw; - - ret = st->chip_info->sw_mode_config(indio_dev); + indio_dev->info = &ad7606_info_os_range_and_debug; + + ret = st->bops->sw_mode_config(indio_dev); if (ret < 0) return ret; } |