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2023-12-08 01573e231f18eb2d99162747186f59511f56b64d

 kernel/include/linux/mfd/core.h
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@@ -1,20 +1,53 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /*
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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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9
 
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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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+
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+#define MFD_RES_SIZE(arr) (sizeof(arr) / sizeof(struct resource))
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+
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+#define MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, _of_reg, _use_of_reg, _match) \
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+	{								\
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+		.name = (_name),					\
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+		.resources = (_res),					\
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+		.num_resources = MFD_RES_SIZE((_res)),			\
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+		.platform_data = (_pdata),				\
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+		.pdata_size = (_pdsize),				\
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+		.of_compatible = (_compat),				\
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+		.of_reg = (_of_reg),					\
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+		.use_of_reg = (_use_of_reg),				\
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+		.acpi_match = (_match),					\
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+		.id = (_id),						\
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+	}
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+
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+#define OF_MFD_CELL_REG(_name, _res, _pdata, _pdsize, _id, _compat, _of_reg) \
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+	MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, _of_reg, true, NULL)
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+
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+#define OF_MFD_CELL(_name, _res, _pdata, _pdsize, _id, _compat) \
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+	MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, _compat, 0, false, NULL)
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+
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+#define ACPI_MFD_CELL(_name, _res, _pdata, _pdsize, _id, _match) \
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+	MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, 0, false, _match)
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+
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+#define MFD_CELL_BASIC(_name, _res, _pdata, _pdsize, _id) \
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+	MFD_CELL_ALL(_name, _res, _pdata, _pdsize, _id, NULL, 0, false, NULL)
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+
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+#define MFD_CELL_RES(_name, _res) \
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+	MFD_CELL_ALL(_name, _res, NULL, 0, 0, NULL, 0, false, NULL)
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+
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+#define MFD_CELL_NAME(_name) \
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+	MFD_CELL_ALL(_name, NULL, NULL, 0, 0, NULL, 0, false, NULL)
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+
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+#define MFD_DEP_LEVEL_NORMAL 0
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+#define MFD_DEP_LEVEL_HIGH 1
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 struct irq_domain;
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 struct property_entry;
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@@ -33,9 +66,8 @@
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 struct mfd_cell {
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 	const char		*name;
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 	int			id;
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+	int			level;
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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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@@ -47,13 +79,23 @@
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 	size_t			pdata_size;
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 	/* device properties passed to the sub devices drivers */
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-	struct property_entry *properties;
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+	const struct property_entry *properties;
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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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+	 * See: Documentation/devicetree/usage-model.rst Chapter 2.2 for details
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 	 */
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 	const char		*of_compatible;
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+
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+	/*
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+	 * Address as defined in Device Tree.  Used to compement 'of_compatible'
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+	 * (above) when matching OF nodes with devices that have identical
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+	 * compatible strings
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+	 */
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+	const u64 of_reg;
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+
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+	/* Set to 'true' to use 'of_reg' (above) - allows for of_reg=0 */
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+	bool use_of_reg;
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 	/* Matches ACPI */
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 	const struct mfd_cell_acpi_match	*acpi_match;
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@@ -91,24 +133,6 @@
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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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-/*
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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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@@ -130,6 +154,7 @@
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 }
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 extern void mfd_remove_devices(struct device *parent);
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+extern void mfd_remove_devices_late(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,