platform driver

Linux 6.18.37 LTS: drivers/base/platform.c
Linux 6.18.37 LTS: drivers/base/dd.c
Linux 6.18.37 LTS: include/linux/platform_device.h

		return 1;
	return 0;
}

/**
 * __platform_driver_probe - register driver for non-hotpluggable device
 * @drv: platform driver structure
 * @probe: the driver probe routine, probably from an __init section
 * @module: module which will be the owner of the driver
 *
 * Use this instead of platform_driver_register() when you know the device
 * is not hotpluggable and has already been registered, and you want to
 * remove its run-once probe() infrastructure from memory after the driver
 * has bound to the device.
 *
 * One typical use for this would be with drivers for controllers integrated
 * into system-on-chip processors, where the controller devices have been
 * configured as part of board setup.
 *
 * Note that this is incompatible with deferred probing.
 *
 * Returns zero if the driver registered and bound to a device, else returns
 * a negative error code and with the driver not registered.
 */
int __init_or_module __platform_driver_probe(struct platform_driver *drv,
		int (*probe)(struct platform_device *), struct module *module)
{
	int retval;

	if (drv->driver.probe_type == PROBE_PREFER_ASYNCHRONOUS) {
		pr_err("%s: drivers registered with %s can not be probed asynchronously\n",
			 drv->driver.name, __func__);
		return -EINVAL;
	}

	/*
	 * We have to run our probes synchronously because we check if
	 * we find any devices to bind to and exit with error if there
	 * are any.
	 */

	.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);

struct resource *platform_get_mem_or_io(struct platform_device *dev,
					unsigned int num)
{
	u32 i;

	for (i = 0; i < dev->num_resources; i++) {
		struct resource *r = &dev->resource[i];

		if ((resource_type(r) & (IORESOURCE_MEM|IORESOURCE_IO)) && num-- == 0)
			return r;
	}
	return NULL;
}