From: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
The *_balance_switch_en and *_balance_switch_timer attributes had non
standard prefixes. Use the ext_info framework to automatically
create then with in_voltageX-voltageY_ prefix.
Documentation for these two unusual attributes to follow.
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
---
drivers/staging/iio/adc/ad7280a.c | 174 ++++++++----------------------
1 file changed, 43 insertions(+), 131 deletions(-)
diff --git a/drivers/staging/iio/adc/ad7280a.c b/drivers/staging/iio/adc/ad7280a.c
index 0aeca39388cf..032d6430bebf 100644
--- a/drivers/staging/iio/adc/ad7280a.c
+++ b/drivers/staging/iio/adc/ad7280a.c
@@ -156,7 +156,6 @@ static unsigned int ad7280a_devaddr(unsigned int addr)
struct ad7280_state {
struct spi_device *spi;
struct iio_chan_spec *channels;
- struct iio_dev_attr *iio_attr;
int slave_num;
int scan_cnt;
int readback_delay_us;
@@ -447,37 +446,33 @@ static int ad7280_chain_setup(struct ad7280_state *st)
return ret;
}
-static ssize_t ad7280_show_balance_sw(struct device *dev,
- struct device_attribute *attr,
- char *buf)
+static ssize_t ad7280_show_balance_sw(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan, char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ad7280_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- return sprintf(buf, "%d\n",
- !!(st->cb_mask[this_attr->address >> 8] &
- (1 << ((this_attr->address & 0xFF) + 2))));
+ return sysfs_emit(buf, "%d\n",
+ !!(st->cb_mask[chan->address >> 8] &
+ (1 << ((chan->address & 0xFF) + 2))));
}
-static ssize_t ad7280_store_balance_sw(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
+static ssize_t ad7280_store_balance_sw(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ad7280_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
+ unsigned int devaddr, ch;
bool readin;
int ret;
- unsigned int devaddr, ch;
ret = strtobool(buf, &readin);
if (ret)
return ret;
- devaddr = this_attr->address >> 8;
- ch = this_attr->address & 0xFF;
+ devaddr = chan->address >> 8;
+ ch = chan->address & 0xFF;
mutex_lock(&st->lock);
if (readin)
@@ -492,19 +487,18 @@ static ssize_t ad7280_store_balance_sw(struct device *dev,
return ret ? ret : len;
}
-static ssize_t ad7280_show_balance_timer(struct device *dev,
- struct device_attribute *attr,
+static ssize_t ad7280_show_balance_timer(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
char *buf)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ad7280_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- int ret;
unsigned int msecs;
+ int ret;
mutex_lock(&st->lock);
- ret = ad7280_read_reg(st, this_attr->address >> 8,
- this_attr->address & 0xFF);
+ ret = ad7280_read_reg(st, chan->address >> 8,
+ (chan->address & 0xFF) + AD7280A_CB1_TIMER_REG);
mutex_unlock(&st->lock);
if (ret < 0)
@@ -512,43 +506,50 @@ static ssize_t ad7280_show_balance_timer(struct device *dev,
msecs = FIELD_GET(AD7280A_CB_TIMER_VAL_MSK, ret) * 71500;
- return sprintf(buf, "%u\n", msecs);
+ return sysfs_emit(buf, "%u.%u\n", msecs / 1000, msecs % 1000);
}
-static ssize_t ad7280_store_balance_timer(struct device *dev,
- struct device_attribute *attr,
- const char *buf,
- size_t len)
+static ssize_t ad7280_store_balance_timer(struct iio_dev *indio_dev,
+ uintptr_t private,
+ const struct iio_chan_spec *chan,
+ const char *buf, size_t len)
{
- struct iio_dev *indio_dev = dev_to_iio_dev(dev);
struct ad7280_state *st = iio_priv(indio_dev);
- struct iio_dev_attr *this_attr = to_iio_dev_attr(attr);
- unsigned long val;
+ int val, val2;
int ret;
- ret = kstrtoul(buf, 10, &val);
+ ret = iio_str_to_fixpoint(buf, 1000, &val, &val2);
if (ret)
return ret;
+ val = val * 1000 + val2;
val /= 71500;
if (val > 31)
return -EINVAL;
mutex_lock(&st->lock);
- ret = ad7280_write(st, this_attr->address >> 8,
- this_attr->address & 0xFF, 0,
+ ret = ad7280_write(st, chan->address >> 8,
+ (chan->address & 0xFF) + AD7280A_CB1_TIMER_REG, 0,
FIELD_PREP(AD7280A_CB_TIMER_VAL_MSK, val));
mutex_unlock(&st->lock);
return ret ? ret : len;
}
-static struct attribute *ad7280_attributes[AD7280A_MAX_CHAIN *
- AD7280A_CELLS_PER_DEV * 2 + 1];
-
-static const struct attribute_group ad7280_attrs_group = {
- .attrs = ad7280_attributes,
+static const struct iio_chan_spec_ext_info ad7280_cell_ext_info[] = {
+ {
+ .name = "balance_switch_en",
+ .read = ad7280_show_balance_sw,
+ .write = ad7280_store_balance_sw,
+ .shared = IIO_SEPARATE,
+ }, {
+ .name = "balance_switch_timer",
+ .read = ad7280_show_balance_timer,
+ .write = ad7280_store_balance_timer,
+ .shared = IIO_SEPARATE,
+ },
+ {}
};
static const struct iio_event_spec ad7280_events[] = {
@@ -571,6 +572,7 @@ static void ad7280_voltage_channel_init(struct iio_chan_spec *chan, int i)
chan->channel2 = chan->channel + 1;
chan->event_spec = ad7280_events;
chan->num_event_specs = ARRAY_SIZE(ad7280_events);
+ chan->ext_info = ad7280_cell_ext_info;
}
static void ad7280_temp_channel_init(struct iio_chan_spec *chan, int i)
@@ -663,91 +665,6 @@ static int ad7280_channel_init(struct ad7280_state *st)
return cnt + 1;
}
-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 addr, ch, i, ret;
- struct iio_dev_attr *iio_attr;
- struct device *sdev = &st->spi->dev;
-
- for (ch = AD7280A_CELL_VOLTAGE_1_REG; ch <= AD7280A_CELL_VOLTAGE_6_REG; 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_REG + 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; dev <= st->slave_num; dev++) {
- ret = ad7280_init_dev_attrs(st, dev, &cnt);
- if (ret < 0)
- return ret;
- }
-
- return 0;
-}
-
static int ad7280a_read_thresh(struct iio_dev *indio_dev,
const struct iio_chan_spec *chan,
enum iio_event_type type,
@@ -949,7 +866,6 @@ static const struct iio_info ad7280_info = {
.read_raw = ad7280_read_raw,
.read_event_value = &ad7280a_read_thresh,
.write_event_value = &ad7280a_write_thresh,
- .attrs = &ad7280_attrs_group,
};
static const struct ad7280_platform_data ad7793_default_pdata = {
@@ -1030,10 +946,6 @@ static int ad7280_probe(struct spi_device *spi)
indio_dev->channels = st->channels;
indio_dev->info = &ad7280_info;
- ret = ad7280_attr_init(st);
- if (ret < 0)
- return ret;
-
ret = devm_iio_device_register(&spi->dev, indio_dev);
if (ret)
return ret;
--
2.32.0
