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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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12345678910111213141516171819202122232425262728293031323334353637383940414243444546474849505152535455565758596061626364656667686970717273// SPDX-License-Identifier: GPL-2.0-only/* * Virtual EISA root driver. * Acts as a placeholder if we don't have a proper EISA bridge. * * (C) 2003 Marc Zyngier <maz@wild-wind.fr.eu.org> */
#include <linux/kernel.h>#include <linux/platform_device.h>#include <linux/eisa.h>#include <linux/module.h>#include <linux/moduleparam.h>#include <linux/init.h>
#if defined(CONFIG_EISA_VLB_PRIMING)#define EISA_FORCE_PROBE_DEFAULT 1#else#define EISA_FORCE_PROBE_DEFAULT 0#endif
static int force_probe = EISA_FORCE_PROBE_DEFAULT;static void virtual_eisa_release (struct device *);
/* The default EISA device parent (virtual root device). * Now use a platform device, since that's the obvious choice. */
static struct platform_device eisa_root_dev = { .name = "eisa", .id = 0, .dev = { .release = virtual_eisa_release, },};
static struct eisa_root_device eisa_bus_root = { .dev = &eisa_root_dev.dev, .bus_base_addr = 0, .res = &ioport_resource, .slots = EISA_MAX_SLOTS, .dma_mask = 0xffffffff,};
static void virtual_eisa_release (struct device *dev){ /* nothing really to do here */}
static int __init virtual_eisa_root_init (void){ int r;
if ((r = platform_device_register (&eisa_root_dev))) return r;
eisa_bus_root.force_probe = force_probe;
dev_set_drvdata(&eisa_root_dev.dev, &eisa_bus_root);
if (eisa_root_register (&eisa_bus_root)) { /* A real bridge may have been registered before * us. So quietly unregister. */ platform_device_unregister (&eisa_root_dev); return -1; }
return 0;}
module_param (force_probe, int, 0444);
device_initcall (virtual_eisa_root_init);