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usr
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src
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kernels
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3.10.0-1160.144.1.el7.tuxcare.els3.x86_64.debug
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include
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linux
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mfd
/
Filename :
core.h
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/* * 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; struct property_entry; /* * 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 properties passed to the sub devices drivers */ struct property_entry *properties; /* * 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; }; /* * 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); extern void mfd_remove_devices(struct device *parent); #endif