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