u-boot/include/reset.h

4  * SPDX-License-Identifier: GPL-2.0
13  * A reset is a hardware signal indicating that a HW module (or IP block, or
14  * sometimes an entire off-CPU chip) reset all of its internal state to some
15  * known-good initial state. Drivers will often reset HW modules when they
24  * hardware it manages often has this capability. reset-uclass.h describes the
34  * struct reset_ctl - A handle to (allowing control of) a single reset signal.
40  * reset signal to operate upon.
42  * @dev: The device which implements the reset signal.
43  * @id: The reset signal ID within the provider.
45  * Currently, the reset API assumes that a single integer ID is enough to
46  * identify and configure any reset signal for any reset provider. If this
49  * information, or (b) replace the id field with an opaque pointer, which the
57 	 * Written by of_xlate. We assume a single id is enough for now. In the
60 	unsigned long id;  member
64  * struct reset_ctl_bulk - A handle to (allowing control of) a bulk of reset
73  * @resets: An array of reset signal handles handles.
74  * @count: The number of reset signal handles in the reset array.
83  * reset_get_by_index - Get/request a reset signal by integer index.
85  * This looks up and requests a reset signal. The index is relative to the
88  * mapping of client device reset signal indices to provider reset signals may
89  * be via device-tree properties, board-provided mapping tables, or some other
93  * @index:	The index of the reset signal to request, within the client's
102  * reset_get_bulk - Get/request all reset signals of a device.
108  * may be via device-tree properties, board-provided mapping tables, or some
118  * reset_get_by_name - Get/request a reset signal by name.
120  * This looks up and requests a reset signal. The name is relative to the
123  * mapping of client device reset signal names to provider reset signal may be
124  * via device-tree properties, board-provided mapping tables, or some other
128  * @name:	The name of the reset signal to request, within the client's
137  * reset_request - Request a reset signal.
146  * reset_free - Free a previously requested reset signal.
155  * reset_assert - Assert a reset signal.
157  * This function will assert the specified reset signal, thus resetting the
159  * signal will either stay asserted until reset_deassert() is called, or the
160  * hardware may autonomously clear the reset signal itself.
169  * reset_assert_bulk - Assert all reset signals in a reset control bulk struct.
184  * reset_deassert - Deassert a reset signal.
186  * This function will deassert the specified reset signal, thus releasing the
197  * reset_deassert_bulk - Deassert all reset signals in a reset control bulk
211  * reset_release_all - Assert/Free an array of previously requested resets.
224  * reset_release_bulk - Assert/Free an array of previously requested reset
237 	return reset_release_all(bulk->resets, bulk->count);  in reset_release_bulk()
243 	return -ENOTSUPP;  in reset_get_by_index()
249 	return -ENOTSUPP;  in reset_get_bulk()
255 	return -ENOTSUPP;  in reset_get_by_name()