mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-12-14 14:34:28 +08:00
6ac41c556e
Convert platform_get_resource(), devm_ioremap_resource() to a single call to devm_platform_get_and_ioremap_resource(), as this is exactly what this function does. Signed-off-by: Yangtao Li <frank.li@vivo.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Link: https://lore.kernel.org/r/20230823132744.350618-10-srinivas.kandagatla@linaro.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
78 lines
1.8 KiB
C
78 lines
1.8 KiB
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;
|
|
|
|
priv->base = devm_platform_get_and_ioremap_resource(pdev, 0, &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");
|