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133 lines
3.9 KiB
133 lines
3.9 KiB
/* |
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* drivers/mfd/mfd-core.h |
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* |
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* core MFD support |
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* Copyright (c) 2006 Ian Molton |
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* Copyright (c) 2007 Dmitry Baryshkov |
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* |
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* This program is free software; you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License version 2 as |
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* published by the Free Software Foundation. |
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* |
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*/ |
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#ifndef MFD_CORE_H |
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#define MFD_CORE_H |
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#include <linux/platform_device.h> |
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struct irq_domain; |
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/* Matches ACPI PNP id, either _HID or _CID, or ACPI _ADR */ |
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struct mfd_cell_acpi_match { |
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const char *pnpid; |
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const unsigned long long adr; |
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}; |
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/* |
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* This struct describes the MFD part ("cell"). |
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* After registration the copy of this structure will become the platform data |
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* of the resulting platform_device |
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*/ |
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struct mfd_cell { |
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const char *name; |
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int id; |
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/* refcounting for multiple drivers to use a single cell */ |
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atomic_t *usage_count; |
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int (*enable)(struct platform_device *dev); |
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int (*disable)(struct platform_device *dev); |
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int (*suspend)(struct platform_device *dev); |
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int (*resume)(struct platform_device *dev); |
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/* platform data passed to the sub devices drivers */ |
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void *platform_data; |
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size_t pdata_size; |
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/* |
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* Device Tree compatible string |
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* See: Documentation/devicetree/usage-model.txt Chapter 2.2 for details |
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*/ |
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const char *of_compatible; |
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/* Matches ACPI */ |
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const struct mfd_cell_acpi_match *acpi_match; |
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/* |
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* These resources can be specified relative to the parent device. |
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* For accessing hardware you should use resources from the platform dev |
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*/ |
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int num_resources; |
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const struct resource *resources; |
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/* don't check for resource conflicts */ |
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bool ignore_resource_conflicts; |
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/* |
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* Disable runtime PM callbacks for this subdevice - see |
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* pm_runtime_no_callbacks(). |
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*/ |
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bool pm_runtime_no_callbacks; |
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/* A list of regulator supplies that should be mapped to the MFD |
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* device rather than the child device when requested |
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*/ |
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const char * const *parent_supplies; |
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int num_parent_supplies; |
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}; |
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/* |
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* Convenience functions for clients using shared cells. Refcounting |
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* happens automatically, with the cell's enable/disable callbacks |
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* being called only when a device is first being enabled or no other |
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* clients are making use of it. |
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*/ |
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extern int mfd_cell_enable(struct platform_device *pdev); |
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extern int mfd_cell_disable(struct platform_device *pdev); |
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/* |
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* "Clone" multiple platform devices for a single cell. This is to be used |
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* for devices that have multiple users of a cell. For example, if an mfd |
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* driver wants the cell "foo" to be used by a GPIO driver, an MTD driver, |
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* and a platform driver, the following bit of code would be use after first |
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* calling mfd_add_devices(): |
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* |
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* const char *fclones[] = { "foo-gpio", "foo-mtd" }; |
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* err = mfd_clone_cells("foo", fclones, ARRAY_SIZE(fclones)); |
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* |
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* Each driver (MTD, GPIO, and platform driver) would then register |
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* platform_drivers for "foo-mtd", "foo-gpio", and "foo", respectively. |
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* The cell's .enable/.disable hooks should be used to deal with hardware |
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* resource contention. |
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*/ |
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extern int mfd_clone_cell(const char *cell, const char **clones, |
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size_t n_clones); |
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/* |
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* Given a platform device that's been created by mfd_add_devices(), fetch |
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* the mfd_cell that created it. |
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*/ |
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static inline const struct mfd_cell *mfd_get_cell(struct platform_device *pdev) |
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{ |
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return pdev->mfd_cell; |
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} |
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extern int mfd_add_devices(struct device *parent, int id, |
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const struct mfd_cell *cells, int n_devs, |
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struct resource *mem_base, |
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int irq_base, struct irq_domain *irq_domain); |
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static inline int mfd_add_hotplug_devices(struct device *parent, |
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const struct mfd_cell *cells, int n_devs) |
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{ |
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return mfd_add_devices(parent, PLATFORM_DEVID_AUTO, cells, n_devs, |
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NULL, 0, NULL); |
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} |
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extern void mfd_remove_devices(struct device *parent); |
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extern int devm_mfd_add_devices(struct device *dev, int id, |
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const struct mfd_cell *cells, int n_devs, |
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struct resource *mem_base, |
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int irq_base, struct irq_domain *irq_domain); |
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#endif
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