diff options
Diffstat (limited to 'include/linux/mfd/core.h')
| -rw-r--r-- | include/linux/mfd/core.h | 124 |
1 files changed, 84 insertions, 40 deletions
diff --git a/include/linux/mfd/core.h b/include/linux/mfd/core.h index cebe97ee98b8..faeea7abd688 100644 --- a/include/linux/mfd/core.h +++ b/include/linux/mfd/core.h @@ -1,14 +1,10 @@ +/* SPDX-License-Identifier: GPL-2.0-only */ /* * 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 @@ -16,7 +12,51 @@ #include <linux/platform_device.h> +#define MFD_RES_SIZE(arr) (sizeof(arr) / sizeof(struct resource)) + +#define MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, _of_reg, _use_of_reg, _match) \ + { \ + .name = (_name), \ + .resources = (_res), \ + .num_resources = MFD_RES_SIZE((_res)), \ + .platform_data = (_pdata), \ + .pdata_size = (_pdsize), \ + .of_compatible = (_compat), \ + .of_reg = (_of_reg), \ + .use_of_reg = (_use_of_reg), \ + .acpi_match = (_match), \ + .id = (_id), \ + } + +#define MFD_CELL_OF_REG(_name, _res, _pdata, _pdsize, _id, _compat, _of_reg) \ + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, _of_reg, true, NULL) + +#define MFD_CELL_OF(_name, _res, _pdata, _pdsize, _id, _compat) \ + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, 0, false, NULL) + +#define MFD_CELL_ACPI(_name, _res, _pdata, _pdsize, _id, _match) \ + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, 0, false, _match) + +#define MFD_CELL_BASIC(_name, _res, _pdata, _pdsize, _id) \ + MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, 0, false, NULL) + +#define MFD_CELL_RES(_name, _res) \ + MFD_CELL_ALL(_name, _res, NULL, 0, 0, NULL, 0, false, NULL) + +#define MFD_CELL_NAME(_name) \ + MFD_CELL_ALL(_name, NULL, NULL, 0, 0, NULL, 0, false, NULL) + +#define MFD_DEP_LEVEL_NORMAL 0 +#define MFD_DEP_LEVEL_HIGH 1 + struct irq_domain; +struct software_node; + +/* Matches ACPI PNP id, either _HID or _CID, or ACPI _ADR */ +struct mfd_cell_acpi_match { + const char *pnpid; + const unsigned long long adr; +}; /* * This struct describes the MFD part ("cell"). @@ -26,25 +66,38 @@ struct irq_domain; 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 level; int (*suspend)(struct platform_device *dev); int (*resume)(struct platform_device *dev); /* platform data passed to the sub devices drivers */ - void *platform_data; + const void *platform_data; size_t pdata_size; + + /* Matches ACPI */ + const struct mfd_cell_acpi_match *acpi_match; + + /* Software node for the device. */ + const struct software_node *swnode; + /* * Device Tree compatible string - * See: Documentation/devicetree/usage-model.txt Chapter 2.2 for details + * See: Documentation/devicetree/usage-model.rst Chapter 2.2 for details */ const char *of_compatible; /* + * Address as defined in Device Tree. Used to complement 'of_compatible' + * (above) when matching OF nodes with devices that have identical + * compatible strings + */ + u64 of_reg; + + /* Set to 'true' to use 'of_reg' (above) - allows for of_reg=0 */ + bool use_of_reg; + + /* * These resources can be specified relative to the parent device. * For accessing hardware you should use resources from the platform dev */ @@ -59,34 +112,13 @@ struct mfd_cell { * 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); + /* A list of regulator supplies that should be mapped to the MFD + * device rather than the child device when requested + */ + int num_parent_supplies; + const char * const *parent_supplies; +}; /* * Given a platform device that's been created by mfd_add_devices(), fetch @@ -98,10 +130,22 @@ static inline const struct mfd_cell *mfd_get_cell(struct platform_device *pdev) } extern int mfd_add_devices(struct device *parent, int id, - struct mfd_cell *cells, int n_devs, + 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); +extern void mfd_remove_devices_late(struct device *parent); +extern int devm_mfd_add_devices(struct device *dev, int id, + const struct mfd_cell *cells, int n_devs, + struct resource *mem_base, + int irq_base, struct irq_domain *irq_domain); #endif |