threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
86 lines
1.8 KiB
C
86 lines
1.8 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Amlogic eFuse Driver
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*
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* Copyright (c) 2016 Endless Computers, Inc.
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* Author: Carlo Caione <carlo@endlessm.com>
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*/
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#include <linux/module.h>
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#include <linux/nvmem-provider.h>
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#include <linux/of.h>
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#include <linux/platform_device.h>
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#include <linux/firmware/meson/meson_sm.h>
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static int meson_efuse_read(void *context, unsigned int offset,
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void *val, size_t bytes)
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{
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u8 *buf = val;
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int ret;
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ret = meson_sm_call_read(buf, bytes, SM_EFUSE_READ, offset,
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bytes, 0, 0, 0);
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if (ret < 0)
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return ret;
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return 0;
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}
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static struct nvmem_config econfig = {
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.name = "meson-efuse",
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.owner = THIS_MODULE,
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.stride = 1,
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.word_size = 1,
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.read_only = true,
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};
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static const struct of_device_id meson_efuse_match[] = {
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{ .compatible = "amlogic,meson-gxbb-efuse", },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, meson_efuse_match);
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static int meson_efuse_probe(struct platform_device *pdev)
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{
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struct nvmem_device *nvmem;
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unsigned int size;
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if (meson_sm_call(SM_EFUSE_USER_MAX, &size, 0, 0, 0, 0, 0) < 0)
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return -EINVAL;
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econfig.dev = &pdev->dev;
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econfig.reg_read = meson_efuse_read;
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econfig.size = size;
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nvmem = nvmem_register(&econfig);
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if (IS_ERR(nvmem))
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return PTR_ERR(nvmem);
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platform_set_drvdata(pdev, nvmem);
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return 0;
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}
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static int meson_efuse_remove(struct platform_device *pdev)
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{
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struct nvmem_device *nvmem = platform_get_drvdata(pdev);
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return nvmem_unregister(nvmem);
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}
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static struct platform_driver meson_efuse_driver = {
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.probe = meson_efuse_probe,
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.remove = meson_efuse_remove,
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.driver = {
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.name = "meson-efuse",
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.of_match_table = meson_efuse_match,
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},
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};
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module_platform_driver(meson_efuse_driver);
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MODULE_AUTHOR("Carlo Caione <carlo@endlessm.com>");
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MODULE_DESCRIPTION("Amlogic Meson NVMEM driver");
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MODULE_LICENSE("GPL v2");
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