forked from Minki/linux
db73a059de
Currently, MMIO resource numbers in the TH driver core correspond to PCI BAR numbers, because in the beginning there was only the PCI glue layer. This created some confusion when the ACPI glue layer was added. To avoid confusion and remove glue-specific code from the driver core, split the resource indices between core and glue layers and change the API so that the driver core receives the MMIO resources in the same fixed order. At the same time, make the IRQ always be a parameter to intel_th_alloc() instead of sometimes passing it as a resource. Signed-off-by: Alexander Shishkin <alexander.shishkin@linux.intel.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
88 lines
2.0 KiB
C
88 lines
2.0 KiB
C
// SPDX-License-Identifier: GPL-2.0
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/*
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* Intel(R) Trace Hub ACPI driver
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*
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* Copyright (C) 2017 Intel Corporation.
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*/
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#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
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#include <linux/types.h>
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#include <linux/module.h>
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#include <linux/device.h>
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#include <linux/sysfs.h>
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#include <linux/platform_device.h>
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#include <linux/acpi.h>
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#include "intel_th.h"
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#define DRIVER_NAME "intel_th_acpi"
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static const struct intel_th_drvdata intel_th_acpi_pch = {
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.host_mode_only = 1,
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};
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static const struct intel_th_drvdata intel_th_acpi_uncore = {
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.host_mode_only = 1,
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};
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static const struct acpi_device_id intel_th_acpi_ids[] = {
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{ "INTC1000", (kernel_ulong_t)&intel_th_acpi_uncore },
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{ "INTC1001", (kernel_ulong_t)&intel_th_acpi_pch },
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{ "", 0 },
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};
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MODULE_DEVICE_TABLE(acpi, intel_th_acpi_ids);
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static int intel_th_acpi_probe(struct platform_device *pdev)
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{
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struct acpi_device *adev = ACPI_COMPANION(&pdev->dev);
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struct resource resource[TH_MMIO_END];
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const struct acpi_device_id *id;
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struct intel_th *th;
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int i, r, irq = -1;
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id = acpi_match_device(intel_th_acpi_ids, &pdev->dev);
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if (!id)
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return -ENODEV;
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for (i = 0, r = 0; i < pdev->num_resources && r < TH_MMIO_END; i++)
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if (pdev->resource[i].flags & IORESOURCE_IRQ)
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irq = pdev->resource[i].start;
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else if (pdev->resource[i].flags & IORESOURCE_MEM)
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resource[r++] = pdev->resource[i];
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th = intel_th_alloc(&pdev->dev, (void *)id->driver_data, resource, r,
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irq);
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if (IS_ERR(th))
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return PTR_ERR(th);
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adev->driver_data = th;
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return 0;
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}
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static int intel_th_acpi_remove(struct platform_device *pdev)
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{
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struct intel_th *th = platform_get_drvdata(pdev);
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intel_th_free(th);
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return 0;
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}
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static struct platform_driver intel_th_acpi_driver = {
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.probe = intel_th_acpi_probe,
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.remove = intel_th_acpi_remove,
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.driver = {
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.name = DRIVER_NAME,
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.acpi_match_table = intel_th_acpi_ids,
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},
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};
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module_platform_driver(intel_th_acpi_driver);
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MODULE_LICENSE("GPL v2");
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MODULE_DESCRIPTION("Intel(R) Trace Hub ACPI controller driver");
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MODULE_AUTHOR("Alexander Shishkin <alexander.shishkin@intel.com>");
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