// SPDX-License-Identifier: GPL-2.0
/*
* platform.c - platform 'pseudo' bus for legacy devices
*
* Copyright (c) 2002-3 Patrick Mochel
* Copyright (c) 2002-3 Open Source Development Labs
*
* Please see Documentation/driver-api/driver-model/platform.rst for more
* information.
*/
#include <linux/string.h>
#include <linux/platform_device.h>
#include <linux/of_device.h>
#include <linux/of_irq.h>
#include <linux/module.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/memblock.h>
#include <linux/err.h>
#include <linux/slab.h>
#include <linux/pm_runtime.h>
#include <linux/pm_domain.h>
#include <linux/idr.h>
#include <linux/acpi.h>
#include <linux/clk/clk-conf.h>
#include <linux/limits.h>
#include <linux/property.h>
#include <linux/kmemleak.h>
#include <linux/types.h>
#include "base.h"
#include "power/power.h"
/* For automatically allocated device IDs */
static DEFINE_IDA(platform_devid_ida);
struct device platform_bus = {
.init_name = "platform",
};
EXPORT_SYMBOL_GPL(platform_bus);
/**
* platform_get_resource - get a resource for a device
* @dev: platform device
* @type: resource type
* @num: resource index
*
* Return: a pointer to the resource or NULL on failure.
*/
struct resource *platform_get_resource(struct platform_device *dev,
unsigned int type, unsigned int num)
{
u32 i;
for (i = 0; i < dev->num_resources; i++) {
struct resource *r = &dev->resource[i];
if (type == resource_type(r) && num-- == 0)
return r;
}
return NULL;
}
EXPORT_SYMBOL_GPL(platform_get_resource);
#ifdef CONFIG_HAS_IOMEM
/**
* devm_platform_get_and_ioremap_resource - call devm_ioremap_resource() for a
* platform device and get resource
*
* @pdev: platform device to use both for memory resource lookup as well as
* resource management
* @index: resource index
* @res: optional output parameter to store a pointer to the obtained resource.
*
* Return: a pointer to the remapped memory or an ERR_PTR() encoded error code
* on failure.
*/
void __iomem *
devm_platform_get_and_ioremap_resource(struct platform_device *pdev,
unsigned int index, struct resource **res)
{
struct resource *r;
r = platform_get_resource