fe891a008f
Previously, one would set the mfd_cell's platform_data/data_size to point to the current mfd_cell in order to pass that information along to drivers. This causes the current mfd_cell to always be available to drivers. It also adds a wrapper function for fetching the mfd cell from a platform device, similar to what originally existed for mfd devices. Drivers who previously used platform_data for other purposes can still use it; the difference is that mfd_get_data() must be used to access it (and the pdata structure is no longer allocated in mfd_add_devices). Note that mfd_get_data is intentionally vague (in name) about where the data is stored; variable name changes can come later without having to touch brazillions of drivers. Signed-off-by: Andres Salomon <dilinger@queued.net> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
84 lines
2.1 KiB
C
84 lines
2.1 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>
|
|
|
|
/*
|
|
* 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;
|
|
|
|
int (*enable)(struct platform_device *dev);
|
|
int (*disable)(struct platform_device *dev);
|
|
int (*suspend)(struct platform_device *dev);
|
|
int (*resume)(struct platform_device *dev);
|
|
|
|
/* driver-specific data for MFD-aware "cell" drivers */
|
|
void *driver_data;
|
|
|
|
/* platform_data can be used to pass data to "generic" drivers */
|
|
void *platform_data;
|
|
|
|
/* unused */
|
|
size_t data_size;
|
|
|
|
/*
|
|
* 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;
|
|
};
|
|
|
|
/*
|
|
* 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->dev.platform_data;
|
|
}
|
|
|
|
/*
|
|
* Given a platform device that's been created by mfd_add_devices(), fetch
|
|
* the .platform_data entry from the mfd_cell that created it.
|
|
*/
|
|
static inline void *mfd_get_data(struct platform_device *pdev)
|
|
{
|
|
return mfd_get_cell(pdev)->platform_data;
|
|
}
|
|
|
|
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);
|
|
|
|
extern void mfd_remove_devices(struct device *parent);
|
|
|
|
#endif
|