linux-imx

// SPDX-License-Identifier: GPL-2.0+

/*

 * Common ACPI functions for hot plug platforms

 *

 * Copyright (C) 2006 Intel Corporation

 *

 * All rights reserved.

 *

 * Send feedback to <kristen.c.accardi@intel.com>

 */

​

#include <linux/module.h>

#include <linux/moduleparam.h>

#include <linux/kernel.h>

#include <linux/types.h>

#include <linux/pci.h>

#include <linux/pci_hotplug.h>

#include <linux/acpi.h>

#include <linux/pci-acpi.h>

#include <linux/slab.h>

​

#define MY_NAME "acpi_pcihp"

​

#define dbg(fmt, arg...) do { if (debug_acpi) printk(KERN_DEBUG "%s: %s: " fmt, MY_NAME, __func__, ## arg); } while (0)

#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME, ## arg)

#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME, ## arg)

#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME, ## arg)

​

#define METHOD_NAME__SUN    "_SUN"

#define METHOD_NAME_OSHP    "OSHP"

​

static bool debug_acpi;

​

/* acpi_run_oshp - get control of hotplug from the firmware

 *

 * @handle - the handle of the hotplug controller.

 */

static acpi_status acpi_run_oshp(acpi_handle handle)

{

    acpi_status     status;

    struct acpi_buffer  string = { ACPI_ALLOCATE_BUFFER, NULL };

​

    acpi_get_name(handle, ACPI_FULL_PATHNAME, &string);

​

    /* run OSHP */

    status = acpi_evaluate_object(handle, METHOD_NAME_OSHP, NULL, NULL);

    if (ACPI_FAILURE(status))

        if (status != AE_NOT_FOUND)

            printk(KERN_ERR "%s:%s OSHP fails=0x%x\n",

                   __func__, (char *)string.pointer, status);

        else

            dbg("%s:%s OSHP not found\n",

                __func__, (char *)string.pointer);

    else

        pr_debug("%s:%s OSHP passes\n", __func__,

            (char *)string.pointer);

​

    kfree(string.pointer);

    return status;

}

​

/**

 * acpi_get_hp_hw_control_from_firmware