linux-imx

​

/*

 * ACPI support for platform bus type.

 *

 * Copyright (C) 2015, Linaro Ltd

 * Author: Graeme Gregory <graeme.gregory@linaro.org>

 *

 * This program is free software; you can redistribute it and/or modify

 * it under the terms of the GNU General Public License version 2 as

 * published by the Free Software Foundation.

 */

​

#include <linux/acpi.h>

#include <linux/amba/bus.h>

#include <linux/clkdev.h>

#include <linux/clk-provider.h>

#include <linux/device.h>

#include <linux/err.h>

#include <linux/ioport.h>

#include <linux/kernel.h>

#include <linux/module.h>

​

#include "internal.h"

​

static const struct acpi_device_id amba_id_list[] = {

    {"ARMH0061", 0}, /* PL061 GPIO Device */

    {"", 0},

};

​

static void amba_register_dummy_clk(void)

{

    static struct clk *amba_dummy_clk;

​

    /* If clock already registered */

    if (amba_dummy_clk)

        return;

​

    amba_dummy_clk = clk_register_fixed_rate(NULL, "apb_pclk", NULL, 0, 0);

    clk_register_clkdev(amba_dummy_clk, "apb_pclk", NULL);

}

​

static int amba_handler_attach(struct acpi_device *adev,

                const struct acpi_device_id *id)

{

    struct amba_device *dev;

    struct resource_entry *rentry;

    struct list_head resource_list;

    bool address_found = false;

    int irq_no = 0;

    int ret;

​

    /* If the ACPI node already has a physical device attached, skip it. */

    if (adev->physical_node_count)

        return 0;

​

    dev = amba_device_alloc(dev_name(&adev->dev), 0, 0);

    if (!dev) {

        dev_err(&adev->dev, "%s(): amba_device_alloc() failed\n",

            __func__);

        return -ENOMEM;

    }

​

    INIT_LIST_HEAD(&resource_list);