Hi Peng,
> According to code:
> if (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UV)
> ret = regulator_set_value(dev, uc_pdata->min_uV);
> if (!ret && (uc_pdata->flags & REGULATOR_FLAG_AUTOSET_UA))
> ret = regulator_set_current(dev, uc_pdata->min_uA);
>
> So you get -ENOSYS from the upper code?
Yes, for fixed regulators, the following if clause evaluates to true in
regulator_pre_probe:
/* Those values are optional (-ENODATA if unset) */
if ((uc_pdata->min_uV != -ENODATA) &&
(uc_pdata->max_uV != -ENODATA) &&
(uc_pdata->min_uV == uc_pdata->max_uV))
uc_pdata->flags |= REGULATOR_FLAG_AUTOSET_UV;
However, in regulator_set_value, there is this section:
if (!ops || !ops->set_value)
return -ENOSYS;
So for fixed regulators, which don’t have a set_value, we’ll always get a
-ENOSYS.
Sven
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