1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2013 Google, Inc
6 * Pavel Herrmann <morpheus.ibis@gmail.com>
7 * Marek Vasut <marex@denx.de>
10 #ifndef _DM_PLATDATA_H
11 #define _DM_PLATDATA_H
13 #include <linker_lists.h>
16 * struct driver_info - Information required to instantiate a device
18 * NOTE: Avoid using this except in extreme circumstances, where device tree
19 * is not feasible (e.g. serial driver in SPL where <8KB of SRAM is
20 * available). U-Boot's driver model uses device tree for configuration.
23 * @platdata: Driver-specific platform data
24 * @platdata_size: Size of platform data structure
25 * @dev: Device created from this structure data
30 #if CONFIG_IS_ENABLED(OF_PLATDATA)
37 * NOTE: Avoid using these except in extreme circumstances, where device tree
38 * is not feasible (e.g. serial driver in SPL where <8KB of SRAM is
39 * available). U-Boot's driver model uses device tree for configuration.
41 #define U_BOOT_DEVICE(__name) \
42 ll_entry_declare(struct driver_info, __name, driver_info)
44 /* Declare a list of devices. The argument is a driver_info[] array */
45 #define U_BOOT_DEVICES(__name) \
46 ll_entry_declare_list(struct driver_info, __name, driver_info)
49 * Get a pointer to a given device info given its name
51 * With the declaration U_BOOT_DEVICE(name), DM_GET_DEVICE(name) will return a
52 * pointer to the struct driver_info created by that declaration.
54 * if OF_PLATDATA is enabled, from this it is possible to use the @dev member of
55 * struct driver_info to find the device pointer itself.
57 * TODO(sjg@chromium.org): U_BOOT_DEVICE() tells U-Boot to create a device, so
58 * the naming seems sensible, but DM_GET_DEVICE() is a bit of misnomer, since it
59 * finds the driver_info record, not the device.
61 * @__name: Driver name (C identifier, not a string. E.g. gpio7_at_ff7e0000)
62 * @return struct driver_info * to the driver that created the device
64 #define DM_GET_DEVICE(__name) \
65 ll_entry_get(struct driver_info, __name, driver_info)
68 * dm_populate_phandle_data() - Populates phandle data in platda
70 * This populates phandle data with an U_BOOT_DEVICE entry get by
71 * DM_GET_DEVICE. The implementation of this function will be done
72 * by dtoc when parsing dtb.
74 void dm_populate_phandle_data(void);