drivers/hwtracing/intel_th/acpi.c

   1 // SPDX-License-Identifier: GPL-2.0
   2 /*
   3  * Intel(R) Trace Hub ACPI driver
   4  *
   5  * Copyright (C) 2017 Intel Corporation.
   6  */
   7
   8 #define pr_fmt(fmt)     KBUILD_MODNAME ": " fmt
   9
  10 #include <linux/types.h>
  11 #include <linux/module.h>
  12 #include <linux/device.h>
  13 #include <linux/sysfs.h>
  14 #include <linux/platform_device.h>
  15 #include <linux/acpi.h>
  16
  17 #include "intel_th.h"
  18
  19 #define DRIVER_NAME "intel_th_acpi"
  20
  21 static const struct intel_th_drvdata intel_th_acpi_pch = {
  22         .host_mode_only = 1,
  23 };
  24
  25 static const struct intel_th_drvdata intel_th_acpi_uncore = {
  26         .host_mode_only = 1,
  27 };
  28
  29 static const struct acpi_device_id intel_th_acpi_ids[] = {
  30         { "INTC1000",   (kernel_ulong_t)&intel_th_acpi_uncore },
  31         { "INTC1001",   (kernel_ulong_t)&intel_th_acpi_pch },
  32         { "",           0 },
  33 };
  34
  35 MODULE_DEVICE_TABLE(acpi, intel_th_acpi_ids);
  36
  37 static int intel_th_acpi_probe(struct platform_device *pdev)
  38 {
  39         struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
  40         struct resource resource[TH_MMIO_END];
  41         const struct acpi_device_id *id;
  42         struct intel_th *th;
  43         int i, r;
  44
  45         id = acpi_match_device(intel_th_acpi_ids, &pdev->dev);
  46         if (!id)
  47                 return -ENODEV;
  48
  49         for (i = 0, r = 0; i < pdev->num_resources && r < TH_MMIO_END; i++)
  50                 if (pdev->resource[i].flags &
  51                     (IORESOURCE_IRQ | IORESOURCE_MEM))
  52                         resource[r++] = pdev->resource[i];
  53
  54         th = intel_th_alloc(&pdev->dev, (void *)id->driver_data, resource, r);
  55         if (IS_ERR(th))
  56                 return PTR_ERR(th);
  57
  58         adev->driver_data = th;
  59
  60         return 0;
  61 }
  62
  63 static int intel_th_acpi_remove(struct platform_device *pdev)
  64 {
  65         struct intel_th *th = platform_get_drvdata(pdev);
  66
  67         intel_th_free(th);
  68
  69         return 0;
  70 }
  71
  72 static struct platform_driver intel_th_acpi_driver = {
  73         .probe          = intel_th_acpi_probe,
  74         .remove         = intel_th_acpi_remove,
  75         .driver         = {
  76                 .name                   = DRIVER_NAME,
  77                 .acpi_match_table       = intel_th_acpi_ids,
  78         },
  79 };
  80
  81 module_platform_driver(intel_th_acpi_driver);
  82
  83 MODULE_LICENSE("GPL v2");
  84 MODULE_DESCRIPTION("Intel(R) Trace Hub ACPI controller driver");
  85 MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");