update_policy
if (!d->get_policy || !d->update_policy)
return d->update_policy(regmap, reg, bit, *value);
int (*update_policy)(struct regmap *r, int reg, int bit, int enable);
.update_policy = intel_bxtwc_pmic_update_policy,
.update_policy = intel_crc_pmic_update_policy,
goto update_policy;
update_policy:
.write = update_policy,