static ssize_t iio_bfin_tmr_frequency_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct iio_trigger *trig = to_iio_trigger(dev);
struct bfin_tmr_state *st = trig->private_data;
unsigned long val;
bool enabled;
int ret;
ret = strict_strtoul(buf, 10, &val);
if (ret)
goto error_ret;
if (val > 100000) {
ret = -EINVAL;
goto error_ret;
}
enabled = get_enabled_gptimers() & st->t->bit;
if (enabled)
disable_gptimers(st->t->bit);
if (!val)
goto error_ret;
val = get_sclk() / val;
if (val <= 4 || val <= st->duty) {
ret = -EINVAL;
goto error_ret;
}
set_gptimer_period(st->t->id, val);
set_gptimer_pwidth(st->t->id, val - st->duty);
if (enabled)
enable_gptimers(st->t->bit);
error_ret:
return ret ? ret : count;
}
static ssize_t iio_bfin_tmr_frequency_store(struct device *dev,
struct device_attribute *attr, const char *buf, size_t count)
{
struct iio_trigger *trig = to_iio_trigger(dev);
struct bfin_tmr_state *st = iio_trigger_get_drvdata(trig);
unsigned int val;
bool enabled;
int ret;
ret = kstrtouint(buf, 10, &val);
if (ret)
return ret;
if (val > 100000)
return -EINVAL;
enabled = get_enabled_gptimers() & st->t->bit;
if (enabled)
disable_gptimers(st->t->bit);
if (val == 0)
return count;
val = get_sclk() / val;
if (val <= 4 || val <= st->duty)
return -EINVAL;
set_gptimer_period(st->t->id, val);
set_gptimer_pwidth(st->t->id, val - st->duty);
if (enabled)
enable_gptimers(st->t->bit);
return count;
}
