1 /* SPDX-License-Identifier: GPL-2.0+ */
3 * Copyright (c) 2015 Google, Inc
4 * Written by Simon Glass <sjg@chromium.org>
10 #include <dm/ofnode.h>
14 * struct syscon_uc_info - Information stored by the syscon UCLASS_UCLASS
16 * @regmap: Register map for this controller
18 struct syscon_uc_info {
19 struct regmap *regmap;
22 /* So far there are no ops so this is a placeholder */
26 #define syscon_get_ops(dev) ((struct syscon_ops *)(dev)->driver->ops)
28 #if CONFIG_IS_ENABLED(OF_PLATDATA)
30 * We don't support 64-bit machines. If they are so resource-contrained that
31 * they need to use OF_PLATDATA, something is horribly wrong with the
32 * education of our hardware engineers.
34 * Update: 64-bit is now supported and we have an education crisis.
36 struct syscon_base_plat {
42 * syscon_get_regmap() - Get access to a register map
44 * @dev: Device to check (UCLASS_SCON)
45 * @info: Returns regmap for the device
46 * @return 0 if OK, -ve on error
48 struct regmap *syscon_get_regmap(struct udevice *dev);
51 * syscon_get_regmap_by_driver_data() - Look up a controller by its ID
53 * Each system controller can be accessed by its driver data, which is
54 * assumed to be unique through the scope of all system controllers that
55 * are in use. This function looks up the controller given this driver data.
57 * @driver_data: Driver data value to look up
58 * @devp: Returns the controller correponding to @driver_data
59 * @return 0 on success, -ENODEV if the ID was not found, or other -ve error
62 int syscon_get_by_driver_data(ulong driver_data, struct udevice **devp);
65 * syscon_get_regmap_by_driver_data() - Look up a controller by its ID
67 * Each system controller can be accessed by its driver data, which is
68 * assumed to be unique through the scope of all system controllers that
69 * are in use. This function looks up the regmap given this driver data.
71 * @driver_data: Driver data value to look up
72 * @return register map correponding to @driver_data, or -ve error code
74 struct regmap *syscon_get_regmap_by_driver_data(ulong driver_data);
77 * syscon_regmap_lookup_by_phandle() - Look up a controller by a phandle
79 * This operates by looking up the given name in the device (device
80 * tree property) of the device using the system controller.
82 * @dev: Device using the system controller
83 * @name: Name of property referring to the system controller
84 * @return A pointer to the regmap if found, ERR_PTR(-ve) on error
86 struct regmap *syscon_regmap_lookup_by_phandle(struct udevice *dev,
90 * syscon_get_first_range() - get the first memory range from a syscon regmap
92 * @driver_data: Driver data value to look up
93 * @return first region of register map correponding to @driver_data, or
96 void *syscon_get_first_range(ulong driver_data);
99 * syscon_node_to_regmap - get regmap from syscon
101 * @node: Device node of syscon
103 struct regmap *syscon_node_to_regmap(ofnode node);