wifi: mt76: permit to use alternative cell name to eeprom NVMEM load

Generilize mt76_get_of_eeprom_from_nvmem to use alternative cell name by
passing the cell name as an arg and expose it.

Rename it to mt76_get_of_data_from_nvmem to better reflect the now more
generic usage.

This is to permit driver to load additional cell, like precal cell.
Tested-by: Shiji Yang <yangshiji66@outlook.com>
Signed-off-by: Christian Marangi <ansuelsmth@gmail.com>
Signed-off-by: Felix Fietkau <nbd@nbd.name>

drivers/net/wireless/mediatek/mt76/eeprom.c

@@ -107,7 +107,8 @@ int mt76_get_of_data_from_mtd(struct mt76_dev *dev, void *eep, int offset, int l
 }
 EXPORT_SYMBOL_GPL(mt76_get_of_data_from_mtd);
 
-static int mt76_get_of_eeprom_from_nvmem(struct mt76_dev *dev, void *eep, int len)
+int mt76_get_of_data_from_nvmem(struct mt76_dev *dev, void *eep,
+				const char *cell_name, int len)
 {
 	struct device_node *np = dev->dev->of_node;
 	struct nvmem_cell *cell;
@@ -115,7 +116,7 @@ static int mt76_get_of_eeprom_from_nvmem(struct mt76_dev *dev, void *eep, int le
 	size_t retlen;
 	int ret = 0;
 
-	cell = of_nvmem_cell_get(np, "eeprom");
+	cell = of_nvmem_cell_get(np, cell_name);
 	if (IS_ERR(cell))
 		return PTR_ERR(cell);
 
@@ -137,6 +138,7 @@ static int mt76_get_of_eeprom_from_nvmem(struct mt76_dev *dev, void *eep, int le
 
 	return ret;
 }
+EXPORT_SYMBOL_GPL(mt76_get_of_data_from_nvmem);
 
 static int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int len)
 {
@@ -154,7 +156,7 @@ static int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int len)
 	if (!ret)
 		return 0;
 
-	return mt76_get_of_eeprom_from_nvmem(dev, eep, len);
+	return mt76_get_of_data_from_nvmem(dev, eep, "eeprom", len);
 }
 
 void

drivers/net/wireless/mediatek/mt76/mt76.h

@@ -1103,6 +1103,8 @@ void mt76_seq_puts_array(struct seq_file *file, const char *str,
 int mt76_eeprom_init(struct mt76_dev *dev, int len);
 void mt76_eeprom_override(struct mt76_phy *phy);
 int mt76_get_of_data_from_mtd(struct mt76_dev *dev, void *eep, int offset, int len);
+int mt76_get_of_data_from_nvmem(struct mt76_dev *dev, void *eep,
+				const char *cell_name, int len);
 
 struct mt76_queue *
 mt76_init_queue(struct mt76_dev *dev, int qid, int idx, int n_desc,