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

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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: Christian Marangi <ansuelsmth@gmail.com>
Reviewed-by: Daniel Golle <daniel@makrotopia.org>
Tested-by: Daniel Golle <daniel@makrotopia.org>
Signed-off-by: Felix Fietkau <nbd@nbd.name>
This commit is contained in:
Christian Marangi 2023-07-08 20:29:36 +02:00 • committed by Felix Fietkau
parent 7d424a990e
commit 5bef3a406c
1 changed files with 37 additions and 1 deletions
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38
drivers/net/wireless/mediatek/mt76/eeprom.c
View file

@ -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 @@ out_put_node:
#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);