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// SPDX-License-Identifier: GPL-2.0
/*
* Airoha AN8855 Switch EFUSE Driver
*/
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
#include <linux/regmap.h>
#define AN8855_EFUSE_CELL 50
#define AN8855_EFUSE_DATA0 0x1000a500
#define AN8855_EFUSE_R50O GENMASK(30, 24)
static int an8855_efuse_read(void *context, unsigned int offset,
void *val, size_t bytes)
{
struct regmap *regmap = context;
return regmap_bulk_read(regmap, AN8855_EFUSE_DATA0 + offset,
val, bytes / sizeof(u32));
}
static int an8855_efuse_probe(struct platform_device *pdev)
{
struct nvmem_config an8855_nvmem_config = {
.name = "an8855-efuse",
.size = AN8855_EFUSE_CELL * sizeof(u32),
.stride = sizeof(u32),
.word_size = sizeof(u32),
.reg_read = an8855_efuse_read,
};
struct device *dev = &pdev->dev;
struct nvmem_device *nvmem;
struct regmap *regmap;
/* Assign NVMEM priv to MFD regmap */
regmap = dev_get_regmap(dev->parent, NULL);
if (!regmap)
return -ENOENT;
an8855_nvmem_config.priv = regmap;
an8855_nvmem_config.dev = dev;
nvmem = devm_nvmem_register(dev, &an8855_nvmem_config);
return PTR_ERR_OR_ZERO(nvmem);
}
static const struct of_device_id an8855_efuse_of_match[] = {
{ .compatible = "airoha,an8855-efuse", },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, an8855_efuse_of_match);
static struct platform_driver an8855_efuse_driver = {
.probe = an8855_efuse_probe,
.driver = {
.name = "an8855-efuse",
.of_match_table = an8855_efuse_of_match,
},
};
module_platform_driver(an8855_efuse_driver);
MODULE_AUTHOR("Christian Marangi <ansuelsmth@gmail.com>");
MODULE_DESCRIPTION("Driver for AN8855 Switch EFUSE");
MODULE_LICENSE("GPL");
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