mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-01 11:36:49 +07:00
564e7f87a0
Possibly, provider driver initialization is later than consumer driver. Use function subsys_initcall to initialize NVMEM provider early to ensure NVMEM consumer doesn't need to -EPROBE_DEFER. Signed-off-by: Andrew-CT Chen <andrew-ct.chen@mediatek.com> Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
111 lines
2.6 KiB
C
111 lines
2.6 KiB
C
/*
|
|
* Copyright (c) 2015 MediaTek Inc.
|
|
* Author: Andrew-CT Chen <andrew-ct.chen@mediatek.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*/
|
|
|
|
#include <linux/device.h>
|
|
#include <linux/module.h>
|
|
#include <linux/nvmem-provider.h>
|
|
#include <linux/platform_device.h>
|
|
#include <linux/regmap.h>
|
|
|
|
static struct regmap_config mtk_regmap_config = {
|
|
.reg_bits = 32,
|
|
.val_bits = 32,
|
|
.reg_stride = 4,
|
|
};
|
|
|
|
static int mtk_efuse_probe(struct platform_device *pdev)
|
|
{
|
|
struct device *dev = &pdev->dev;
|
|
struct resource *res;
|
|
struct nvmem_device *nvmem;
|
|
struct nvmem_config *econfig;
|
|
struct regmap *regmap;
|
|
void __iomem *base;
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
base = devm_ioremap_resource(dev, res);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
econfig = devm_kzalloc(dev, sizeof(*econfig), GFP_KERNEL);
|
|
if (!econfig)
|
|
return -ENOMEM;
|
|
|
|
mtk_regmap_config.max_register = resource_size(res) - 1;
|
|
|
|
regmap = devm_regmap_init_mmio(dev, base, &mtk_regmap_config);
|
|
if (IS_ERR(regmap)) {
|
|
dev_err(dev, "regmap init failed\n");
|
|
return PTR_ERR(regmap);
|
|
}
|
|
|
|
econfig->dev = dev;
|
|
econfig->owner = THIS_MODULE;
|
|
nvmem = nvmem_register(econfig);
|
|
if (IS_ERR(nvmem))
|
|
return PTR_ERR(nvmem);
|
|
|
|
platform_set_drvdata(pdev, nvmem);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mtk_efuse_remove(struct platform_device *pdev)
|
|
{
|
|
struct nvmem_device *nvmem = platform_get_drvdata(pdev);
|
|
|
|
return nvmem_unregister(nvmem);
|
|
}
|
|
|
|
static const struct of_device_id mtk_efuse_of_match[] = {
|
|
{ .compatible = "mediatek,mt8173-efuse",},
|
|
{ .compatible = "mediatek,efuse",},
|
|
{/* sentinel */},
|
|
};
|
|
MODULE_DEVICE_TABLE(of, mtk_efuse_of_match);
|
|
|
|
static struct platform_driver mtk_efuse_driver = {
|
|
.probe = mtk_efuse_probe,
|
|
.remove = mtk_efuse_remove,
|
|
.driver = {
|
|
.name = "mediatek,efuse",
|
|
.of_match_table = mtk_efuse_of_match,
|
|
},
|
|
};
|
|
|
|
static int __init mtk_efuse_init(void)
|
|
{
|
|
int ret;
|
|
|
|
ret = platform_driver_register(&mtk_efuse_driver);
|
|
if (ret) {
|
|
pr_err("Failed to register efuse driver\n");
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void __exit mtk_efuse_exit(void)
|
|
{
|
|
return platform_driver_unregister(&mtk_efuse_driver);
|
|
}
|
|
|
|
subsys_initcall(mtk_efuse_init);
|
|
module_exit(mtk_efuse_exit);
|
|
|
|
MODULE_AUTHOR("Andrew-CT Chen <andrew-ct.chen@mediatek.com>");
|
|
MODULE_DESCRIPTION("Mediatek EFUSE driver");
|
|
MODULE_LICENSE("GPL v2");
|