99 lines
2.5 KiB
C
99 lines
2.5 KiB
C
// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (c) 2022 Qualcomm Innovation Center, Inc. All rights reserved.
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*/
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#include <linux/err.h>
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/random.h>
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#include <linux/slab.h>
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#include <linux/string.h>
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#include <linux/sys_soc.h>
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#include <linux/types.h>
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#include <linux/of.h>
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/*
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* SoC version type with major number in the upper 16 bits and minor
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* number in the lower 16 bits.
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*/
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#define SOCINFO_MAJOR(ver) (((ver) >> 16) & 0xffff)
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#define SOCINFO_MINOR(ver) ((ver) & 0xffff)
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static struct soc_device *soc_dev;
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static struct platform_device *soc_pdev;
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static int qcom_dt_socinfo_probe(struct platform_device *pdev)
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{
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struct soc_device_attribute *attr;
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struct device_node *root;
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u32 val[2], soc_id, revision;
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int ret;
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attr = devm_kzalloc(&pdev->dev, sizeof(*attr), GFP_KERNEL);
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if (!attr)
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return -ENOMEM;
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root = of_find_node_by_path("/");
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ret = of_property_read_u32_array(root, "qcom,msm-id", val, 2);
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if (ret) {
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dev_err(&pdev->dev, "qcom,msm-id error\n");
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return ret;
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}
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attr->machine = of_get_property(root, "qcom,msm-name", NULL);
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of_node_put(root);
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soc_id = le32_to_cpu(val[0]);
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revision = le32_to_cpu(val[1]);
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attr->family = "Snapdragon";
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attr->soc_id = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%d", soc_id);
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attr->revision = devm_kasprintf(&pdev->dev, GFP_KERNEL, "%u.%u",
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SOCINFO_MAJOR(revision), SOCINFO_MINOR(revision));
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soc_dev = soc_device_register(attr);
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return PTR_ERR_OR_ZERO(soc_dev);
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}
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static int qcom_dt_socinfo_remove(struct platform_device *pdev)
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{
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soc_device_unregister(soc_dev);
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return 0;
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}
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static struct platform_driver qcom_dt_socinfo_driver = {
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.probe = qcom_dt_socinfo_probe,
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.remove = qcom_dt_socinfo_remove,
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.driver = {
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.name = "qcom-dt-socinfo",
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},
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};
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static int __init qcom_dt_socinfo_init(void)
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{
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int ret;
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ret = platform_driver_register(&qcom_dt_socinfo_driver);
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if (ret)
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return ret;
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soc_pdev = platform_device_register_simple("qcom-dt-socinfo", -1, NULL, 0);
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if (IS_ERR(soc_pdev)) {
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platform_driver_unregister(&qcom_dt_socinfo_driver);
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return PTR_ERR(soc_pdev);
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}
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return 0;
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}
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module_init(qcom_dt_socinfo_init);
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static void __exit qcom_dt_socinfo_exit(void)
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{
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platform_device_unregister(soc_pdev);
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platform_driver_unregister(&qcom_dt_socinfo_driver);
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}
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module_exit(qcom_dt_socinfo_exit);
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MODULE_DESCRIPTION("Qualcomm Technologies, Inc. DT based SoCinfo driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:qcom-dt-socinfo");
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