Commit 5bef3a40 authored by Christian Marangi's avatar Christian Marangi Committed by Felix Fietkau
Browse files

wifi: mt76: add support for providing eeprom in nvmem cells 



Add support for providing eeprom in nvmem cells by adding nvmem cell as
an alternative source for mt76_get_of_eeprom().

Nvmem cells will follow standard nvmem cell definition and needs to be
called 'eeprom' to be correctly identified.

Signed-off-by: default avatarChristian Marangi <ansuelsmth@gmail.com>
Reviewed-by: default avatarDaniel Golle <daniel@makrotopia.org>
Tested-by: default avatarDaniel Golle <daniel@makrotopia.org>
Signed-off-by: default avatarFelix Fietkau <nbd@nbd.name>
parent 7d424a99

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

+37 −1
Original line number Diff line number Diff line
@@ -6,6 +6,7 @@ 
#include <linux/of_net.h>

#include <linux/mtd/mtd.h>

#include <linux/mtd/partitions.h>

#include <linux/nvmem-consumer.h>

#include <linux/etherdevice.h>

#include "mt76.h"
@@ -105,6 +106,37 @@ static int mt76_get_of_epprom_from_mtd(struct mt76_dev *dev, void *eep, int offs 
#endif

}



static int mt76_get_of_epprom_from_nvmem(struct mt76_dev *dev, void *eep, int len)

{

	struct device_node *np = dev->dev->of_node;

	struct nvmem_cell *cell;

	const void *data;

	size_t retlen;

	int ret = 0;



	cell = of_nvmem_cell_get(np, "eeprom");

	if (IS_ERR(cell))

		return PTR_ERR(cell);



	data = nvmem_cell_read(cell, &retlen);

	nvmem_cell_put(cell);



	if (IS_ERR(data))

		return PTR_ERR(data);



	if (retlen < len) {

		ret = -EINVAL;

		goto exit;

	}



	memcpy(eep, data, len);



exit:

	kfree(data);



	return ret;

}



int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int offset, int len)

{

	struct device_node *np = dev->dev->of_node;
@@ -117,7 +149,11 @@ int mt76_get_of_eeprom(struct mt76_dev *dev, void *eep, int offset, int len) 
	if (!ret)

		return 0;



	return mt76_get_of_epprom_from_mtd(dev, eep, offset, len);

	ret = mt76_get_of_epprom_from_mtd(dev, eep, offset, len);

	if (!ret)

		return 0;



	return mt76_get_of_epprom_from_nvmem(dev, eep, len);

}

EXPORT_SYMBOL_GPL(mt76_get_of_eeprom);