请用power_supply_get_by_name(ddata->dev)的方法对以下函数进行改写：static int set_charger_type(void) { int ret; static int old_type_en = 0; union power_supply_propval val; struct power_supply *psy = power_supply_get_by_name("bbc"); if (psy == NULL) { pr_info("power_supply_get_by_name error.\n"); return -1; } val.intval = chr_type_en; pr_info("set_charger_type: %d.\n", val.intval); if (val.intval) { if (!old_type_en) { ret = power_supply_set_property(psy, POWER_SUPPLY_PROP_ONLINE, &val); old_type_en = 1; } power_supply_changed(psy); val.intval = POWER_SUPPLY_TYPE_WIRELESS; ret = power_supply_set_property(psy, POWER_SUPPLY_PROP_TYPE, &val); if (!ret) { return val.intval; } else { return 0; } } else { val.intval = POWER_SUPPLY_TYPE_USB; ret = power_supply_set_property(psy, POWER_SUPPLY_PROP_TYPE, &val); if (ret < 0) pr_info("set chg psy failed\n"); power_supply_changed(psy); old_type_en = 0; } return 0; }

static int set_charger_type(void) {
int ret;
static int old_type_en = 0;
union power_supply_propval val;
struct power_supply *psy = power_supply_get_by_name("bbc");

if (!psy) {
pr_info("power_supply_get_by_name error.\n");
return -1;
}

val.intval = chr_type_en;
pr_info("set_charger_type: %d.\n", val.intval);

if (val.intval) {
if (!old_type_en) {
ret = power_supply_set_property(psy, POWER_SUPPLY_PROP_ONLINE, &val);
old_type_en = 1;
}
power_supply_changed(psy);
val.intval = POWER_SUPPLY_TYPE_WIRELESS;
ret = power_supply_set_property(psy, POWER_SUPPLY_PROP_TYPE, &val);
if (ret < 0) {
pr_info("set chg psy failed\n");
return 0;
}
return val.intval;
} else {
val.intval = POWER_SUPPLY_TYPE_USB;
ret = power_supply_set_property(psy, POWER_SUPPLY_PROP_TYPE, &val);
if (ret < 0) {
pr_info("set chg psy failed\n");
}
power_supply_changed(psy);
old_type_en = 0;
}
return 0;
}