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staging: iio: adc: ad7280a: split ad7280_attr_init() to more functions
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The ad7280_attr_init function has been split into more specific
functions to increase the code readability.

Signed-off-by: Slawomir Stepien <sst@poczta.fm>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
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Slawomir Stepien authored and Jonathan Cameron committed Dec 16, 2018
1 parent 243c5c9 commit 4b63745
Showing 1 changed file with 72 additions and 38 deletions.
110 changes: 72 additions & 38 deletions drivers/staging/iio/adc/ad7280a.c
Original file line number Diff line number Diff line change
Expand Up @@ -596,53 +596,87 @@ static int ad7280_channel_init(struct ad7280_state *st)
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)
{
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 dev, ch, cnt;
unsigned int index;
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,
GFP_KERNEL);
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;
}
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