mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-12-16 06:06:44 +07:00
a7975473cc
Hot-pluggable multi-function devices should always be registered with PLATFORM_DEVID_AUTO to avoid name collisions on the platform bus. This helper also hides the memory map and irq parameters, which aren't used by hot-pluggable (e.g. USB-based) devices. Signed-off-by: Johan Hovold <johan@kernel.org> Signed-off-by: Lee Jones <lee.jones@linaro.org>
124 lines
3.6 KiB
C
124 lines
3.6 KiB
C
/*
|
|
* drivers/mfd/mfd-core.h
|
|
*
|
|
* core MFD support
|
|
* Copyright (c) 2006 Ian Molton
|
|
* Copyright (c) 2007 Dmitry Baryshkov
|
|
*
|
|
* 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.
|
|
*
|
|
*/
|
|
|
|
#ifndef MFD_CORE_H
|
|
#define MFD_CORE_H
|
|
|
|
#include <linux/platform_device.h>
|
|
|
|
struct irq_domain;
|
|
|
|
/*
|
|
* This struct describes the MFD part ("cell").
|
|
* After registration the copy of this structure will become the platform data
|
|
* of the resulting platform_device
|
|
*/
|
|
struct mfd_cell {
|
|
const char *name;
|
|
int id;
|
|
|
|
/* refcounting for multiple drivers to use a single cell */
|
|
atomic_t *usage_count;
|
|
int (*enable)(struct platform_device *dev);
|
|
int (*disable)(struct platform_device *dev);
|
|
|
|
int (*suspend)(struct platform_device *dev);
|
|
int (*resume)(struct platform_device *dev);
|
|
|
|
/* platform data passed to the sub devices drivers */
|
|
void *platform_data;
|
|
size_t pdata_size;
|
|
/*
|
|
* Device Tree compatible string
|
|
* See: Documentation/devicetree/usage-model.txt Chapter 2.2 for details
|
|
*/
|
|
const char *of_compatible;
|
|
|
|
/* Matches ACPI PNP id, either _HID or _CID */
|
|
const char *acpi_pnpid;
|
|
|
|
/*
|
|
* These resources can be specified relative to the parent device.
|
|
* For accessing hardware you should use resources from the platform dev
|
|
*/
|
|
int num_resources;
|
|
const struct resource *resources;
|
|
|
|
/* don't check for resource conflicts */
|
|
bool ignore_resource_conflicts;
|
|
|
|
/*
|
|
* Disable runtime PM callbacks for this subdevice - see
|
|
* pm_runtime_no_callbacks().
|
|
*/
|
|
bool pm_runtime_no_callbacks;
|
|
|
|
/* A list of regulator supplies that should be mapped to the MFD
|
|
* device rather than the child device when requested
|
|
*/
|
|
const char * const *parent_supplies;
|
|
int num_parent_supplies;
|
|
};
|
|
|
|
/*
|
|
* Convenience functions for clients using shared cells. Refcounting
|
|
* happens automatically, with the cell's enable/disable callbacks
|
|
* being called only when a device is first being enabled or no other
|
|
* clients are making use of it.
|
|
*/
|
|
extern int mfd_cell_enable(struct platform_device *pdev);
|
|
extern int mfd_cell_disable(struct platform_device *pdev);
|
|
|
|
/*
|
|
* "Clone" multiple platform devices for a single cell. This is to be used
|
|
* for devices that have multiple users of a cell. For example, if an mfd
|
|
* driver wants the cell "foo" to be used by a GPIO driver, an MTD driver,
|
|
* and a platform driver, the following bit of code would be use after first
|
|
* calling mfd_add_devices():
|
|
*
|
|
* const char *fclones[] = { "foo-gpio", "foo-mtd" };
|
|
* err = mfd_clone_cells("foo", fclones, ARRAY_SIZE(fclones));
|
|
*
|
|
* Each driver (MTD, GPIO, and platform driver) would then register
|
|
* platform_drivers for "foo-mtd", "foo-gpio", and "foo", respectively.
|
|
* The cell's .enable/.disable hooks should be used to deal with hardware
|
|
* resource contention.
|
|
*/
|
|
extern int mfd_clone_cell(const char *cell, const char **clones,
|
|
size_t n_clones);
|
|
|
|
/*
|
|
* Given a platform device that's been created by mfd_add_devices(), fetch
|
|
* the mfd_cell that created it.
|
|
*/
|
|
static inline const struct mfd_cell *mfd_get_cell(struct platform_device *pdev)
|
|
{
|
|
return pdev->mfd_cell;
|
|
}
|
|
|
|
extern int mfd_add_devices(struct device *parent, int id,
|
|
const struct mfd_cell *cells, int n_devs,
|
|
struct resource *mem_base,
|
|
int irq_base, struct irq_domain *irq_domain);
|
|
|
|
static inline int mfd_add_hotplug_devices(struct device *parent,
|
|
const struct mfd_cell *cells, int n_devs)
|
|
{
|
|
return mfd_add_devices(parent, PLATFORM_DEVID_AUTO, cells, n_devs,
|
|
NULL, 0, NULL);
|
|
}
|
|
|
|
extern void mfd_remove_devices(struct device *parent);
|
|
|
|
#endif
|