diff options
Diffstat (limited to 'drivers/staging/iio/adc/ad7280a.c')
-rw-r--r-- | drivers/staging/iio/adc/ad7280a.c | 243 |
1 files changed, 158 insertions, 85 deletions
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c index 14f6a3ced060..d9df12665176 100644 --- a/drivers/staging/iio/adc/ad7280a.c +++ b/drivers/staging/iio/adc/ad7280a.c @@ -97,6 +97,10 @@ #define AD7280A_NUM_CH (AD7280A_AUX_ADC_6 - \ AD7280A_CELL_VOLTAGE_1 + 1) +#define AD7280A_CALC_VOLTAGE_CHAN_NUM(d, c) ((d * AD7280A_CELLS_PER_DEV) + c) +#define AD7280A_CALC_TEMP_CHAN_NUM(d, c) ((d * AD7280A_CELLS_PER_DEV) + \ + c - AD7280A_CELLS_PER_DEV) + #define AD7280A_DEVADDR_MASTER 0 #define AD7280A_DEVADDR_ALL 0x1F /* 5-bit device address is sent LSB first */ @@ -496,72 +500,171 @@ static const struct attribute_group ad7280_attrs_group = { .attrs = ad7280_attributes, }; +static void ad7280_voltage_channel_init(struct iio_chan_spec *chan, int i) +{ + chan->type = IIO_VOLTAGE; + chan->differential = 1; + chan->channel = i; + chan->channel2 = chan->channel + 1; +} + +static void ad7280_temp_channel_init(struct iio_chan_spec *chan, int i) +{ + chan->type = IIO_TEMP; + chan->channel = i; +} + +static void ad7280_common_fields_init(struct iio_chan_spec *chan, int addr, + int cnt) +{ + chan->indexed = 1; + chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); + chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); + chan->address = addr; + chan->scan_index = cnt; + chan->scan_type.sign = 'u'; + chan->scan_type.realbits = 12; + chan->scan_type.storagebits = 32; +} + +static void ad7280_total_voltage_channel_init(struct iio_chan_spec *chan, + int cnt, int dev) +{ + chan->type = IIO_VOLTAGE; + chan->differential = 1; + chan->channel = 0; + chan->channel2 = dev * AD7280A_CELLS_PER_DEV; + chan->address = AD7280A_ALL_CELLS; + chan->indexed = 1; + chan->info_mask_separate = BIT(IIO_CHAN_INFO_RAW); + chan->info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); + chan->scan_index = cnt; + chan->scan_type.sign = 'u'; + chan->scan_type.realbits = 32; + chan->scan_type.storagebits = 32; +} + +static void ad7280_timestamp_channel_init(struct iio_chan_spec *chan, int cnt) +{ + chan->type = IIO_TIMESTAMP; + chan->channel = -1; + chan->scan_index = cnt; + chan->scan_type.sign = 's'; + chan->scan_type.realbits = 64; + chan->scan_type.storagebits = 64; +} + +static void ad7280_init_dev_channels(struct ad7280_state *st, int dev, int *cnt) +{ + int addr, ch, i; + struct iio_chan_spec *chan; + + for (ch = AD7280A_CELL_VOLTAGE_1; ch <= AD7280A_AUX_ADC_6; ch++) { + chan = &st->channels[*cnt]; + + if (ch < AD7280A_AUX_ADC_1) { + i = AD7280A_CALC_VOLTAGE_CHAN_NUM(dev, ch); + ad7280_voltage_channel_init(chan, i); + } else { + i = AD7280A_CALC_TEMP_CHAN_NUM(dev, ch); + ad7280_temp_channel_init(chan, i); + } + + addr = ad7280a_devaddr(dev) << 8 | ch; + ad7280_common_fields_init(chan, addr, *cnt); + + (*cnt)++; + } +} + static int ad7280_channel_init(struct ad7280_state *st) { - int dev, ch, cnt; + int dev, cnt = 0; st->channels = devm_kcalloc(&st->spi->dev, (st->slave_num + 1) * 12 + 2, sizeof(*st->channels), GFP_KERNEL); if (!st->channels) return -ENOMEM; - for (dev = 0, cnt = 0; dev <= st->slave_num; dev++) - for (ch = AD7280A_CELL_VOLTAGE_1; ch <= AD7280A_AUX_ADC_6; - ch++, cnt++) { - if (ch < AD7280A_AUX_ADC_1) { - st->channels[cnt].type = IIO_VOLTAGE; - st->channels[cnt].differential = 1; - st->channels[cnt].channel = (dev * 6) + ch; - st->channels[cnt].channel2 = - st->channels[cnt].channel + 1; - } else { - st->channels[cnt].type = IIO_TEMP; - st->channels[cnt].channel = (dev * 6) + ch - 6; - } - st->channels[cnt].indexed = 1; - st->channels[cnt].info_mask_separate = - BIT(IIO_CHAN_INFO_RAW); - st->channels[cnt].info_mask_shared_by_type = - BIT(IIO_CHAN_INFO_SCALE); - st->channels[cnt].address = - ad7280a_devaddr(dev) << 8 | ch; - st->channels[cnt].scan_index = cnt; - st->channels[cnt].scan_type.sign = 'u'; - st->channels[cnt].scan_type.realbits = 12; - st->channels[cnt].scan_type.storagebits = 32; - st->channels[cnt].scan_type.shift = 0; - } + for (dev = 0; dev <= st->slave_num; dev++) + ad7280_init_dev_channels(st, dev, &cnt); - st->channels[cnt].type = IIO_VOLTAGE; - st->channels[cnt].differential = 1; - st->channels[cnt].channel = 0; - st->channels[cnt].channel2 = dev * 6; - st->channels[cnt].address = AD7280A_ALL_CELLS; - st->channels[cnt].indexed = 1; - st->channels[cnt].info_mask_separate = BIT(IIO_CHAN_INFO_RAW); - st->channels[cnt].info_mask_shared_by_type = BIT(IIO_CHAN_INFO_SCALE); - st->channels[cnt].scan_index = cnt; - st->channels[cnt].scan_type.sign = 'u'; - st->channels[cnt].scan_type.realbits = 32; - st->channels[cnt].scan_type.storagebits = 32; - st->channels[cnt].scan_type.shift = 0; + ad7280_total_voltage_channel_init(&st->channels[cnt], cnt, dev); cnt++; - st->channels[cnt].type = IIO_TIMESTAMP; - st->channels[cnt].channel = -1; - st->channels[cnt].scan_index = cnt; - st->channels[cnt].scan_type.sign = 's'; - st->channels[cnt].scan_type.realbits = 64; - st->channels[cnt].scan_type.storagebits = 64; - st->channels[cnt].scan_type.shift = 0; + ad7280_timestamp_channel_init(&st->channels[cnt], cnt); return cnt + 1; } -static int ad7280_attr_init(struct ad7280_state *st) +static int ad7280_balance_switch_attr_init(struct iio_dev_attr *attr, + struct device *dev, int addr, int i) { - int dev, ch, cnt; - unsigned int index; + attr->address = addr; + attr->dev_attr.attr.mode = 0644; + attr->dev_attr.show = ad7280_show_balance_sw; + attr->dev_attr.store = ad7280_store_balance_sw; + attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, + "in%d-in%d_balance_switch_en", + i, i + 1); + if (!attr->dev_attr.attr.name) + return -ENOMEM; + + return 0; +} + +static int ad7280_balance_timer_attr_init(struct iio_dev_attr *attr, + struct device *dev, int addr, int i) +{ + attr->address = addr; + attr->dev_attr.attr.mode = 0644; + attr->dev_attr.show = ad7280_show_balance_timer; + attr->dev_attr.store = ad7280_store_balance_timer; + attr->dev_attr.attr.name = devm_kasprintf(dev, GFP_KERNEL, + "in%d-in%d_balance_timer", + i, i + 1); + if (!attr->dev_attr.attr.name) + return -ENOMEM; + + return 0; +} + +static int ad7280_init_dev_attrs(struct ad7280_state *st, int dev, int *cnt) +{ + int addr, ch, i, ret; struct iio_dev_attr *iio_attr; + struct device *sdev = &st->spi->dev; + + for (ch = AD7280A_CELL_VOLTAGE_1; ch <= AD7280A_CELL_VOLTAGE_6; ch++) { + iio_attr = &st->iio_attr[*cnt]; + addr = ad7280a_devaddr(dev) << 8 | ch; + i = dev * AD7280A_CELLS_PER_DEV + ch; + + ret = ad7280_balance_switch_attr_init(iio_attr, sdev, addr, i); + if (ret < 0) + return ret; + + ad7280_attributes[*cnt] = &iio_attr->dev_attr.attr; + + (*cnt)++; + iio_attr = &st->iio_attr[*cnt]; + addr = ad7280a_devaddr(dev) << 8 | (AD7280A_CB1_TIMER + ch); + + ret = ad7280_balance_timer_attr_init(iio_attr, sdev, addr, i); + if (ret < 0) + return ret; + + ad7280_attributes[*cnt] = &iio_attr->dev_attr.attr; + (*cnt)++; + } + + ad7280_attributes[*cnt] = NULL; + + return 0; +} + +static int ad7280_attr_init(struct ad7280_state *st) +{ + int dev, cnt = 0, ret; st->iio_attr = devm_kcalloc(&st->spi->dev, 2, sizeof(*st->iio_attr) * (st->slave_num + 1) * AD7280A_CELLS_PER_DEV, @@ -569,41 +672,11 @@ static int ad7280_attr_init(struct ad7280_state *st) if (!st->iio_attr) return -ENOMEM; - for (dev = 0, cnt = 0; dev <= st->slave_num; dev++) - for (ch = AD7280A_CELL_VOLTAGE_1; ch <= AD7280A_CELL_VOLTAGE_6; - ch++, cnt++) { - iio_attr = &st->iio_attr[cnt]; - index = dev * AD7280A_CELLS_PER_DEV + ch; - iio_attr->address = ad7280a_devaddr(dev) << 8 | ch; - iio_attr->dev_attr.attr.mode = 0644; - iio_attr->dev_attr.show = ad7280_show_balance_sw; - iio_attr->dev_attr.store = ad7280_store_balance_sw; - iio_attr->dev_attr.attr.name = - devm_kasprintf(&st->spi->dev, GFP_KERNEL, - "in%d-in%d_balance_switch_en", - index, index + 1); - if (!iio_attr->dev_attr.attr.name) - return -ENOMEM; - - ad7280_attributes[cnt] = &iio_attr->dev_attr.attr; - cnt++; - iio_attr = &st->iio_attr[cnt]; - iio_attr->address = ad7280a_devaddr(dev) << 8 | - (AD7280A_CB1_TIMER + ch); - iio_attr->dev_attr.attr.mode = 0644; - iio_attr->dev_attr.show = ad7280_show_balance_timer; - iio_attr->dev_attr.store = ad7280_store_balance_timer; - iio_attr->dev_attr.attr.name = - devm_kasprintf(&st->spi->dev, GFP_KERNEL, - "in%d-in%d_balance_timer", - index, index + 1); - if (!iio_attr->dev_attr.attr.name) - return -ENOMEM; - - ad7280_attributes[cnt] = &iio_attr->dev_attr.attr; - } - - ad7280_attributes[cnt] = NULL; + for (dev = 0; dev <= st->slave_num; dev++) { + ret = ad7280_init_dev_attrs(st, dev, &cnt); + if (ret < 0) + return ret; + } return 0; } |