https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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Tip revision: 7d194c2100ad2a6dded545887d02754948ca5241 authored by Linus Torvalds on 20 October 2019, 19:56:22 UTC
Linux 5.4-rc4
Linux 5.4-rc4
Tip revision: 7d194c2
uniphier-efuse.c
// SPDX-License-Identifier: GPL-2.0-only
/*
* UniPhier eFuse driver
*
* Copyright (C) 2017 Socionext Inc.
*/
#include <linux/device.h>
#include <linux/io.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
#include <linux/nvmem-provider.h>
#include <linux/platform_device.h>
struct uniphier_efuse_priv {
void __iomem *base;
};
static int uniphier_reg_read(void *context,
unsigned int reg, void *_val, size_t bytes)
{
struct uniphier_efuse_priv *priv = context;
u8 *val = _val;
int offs;
for (offs = 0; offs < bytes; offs += sizeof(u8))
*val++ = readb(priv->base + reg + offs);
return 0;
}
static int uniphier_efuse_probe(struct platform_device *pdev)
{
struct device *dev = &pdev->dev;
struct resource *res;
struct nvmem_device *nvmem;
struct nvmem_config econfig = {};
struct uniphier_efuse_priv *priv;
priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
if (!priv)
return -ENOMEM;
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
priv->base = devm_ioremap_resource(dev, res);
if (IS_ERR(priv->base))
return PTR_ERR(priv->base);
econfig.stride = 1;
econfig.word_size = 1;
econfig.read_only = true;
econfig.reg_read = uniphier_reg_read;
econfig.size = resource_size(res);
econfig.priv = priv;
econfig.dev = dev;
nvmem = devm_nvmem_register(dev, &econfig);
return PTR_ERR_OR_ZERO(nvmem);
}
static const struct of_device_id uniphier_efuse_of_match[] = {
{ .compatible = "socionext,uniphier-efuse",},
{/* sentinel */},
};
MODULE_DEVICE_TABLE(of, uniphier_efuse_of_match);
static struct platform_driver uniphier_efuse_driver = {
.probe = uniphier_efuse_probe,
.driver = {
.name = "uniphier-efuse",
.of_match_table = uniphier_efuse_of_match,
},
};
module_platform_driver(uniphier_efuse_driver);
MODULE_AUTHOR("Keiji Hayashibara <hayashibara.keiji@socionext.com>");
MODULE_DESCRIPTION("UniPhier eFuse driver");
MODULE_LICENSE("GPL v2");