Lines Matching +full:fifo +full:- +full:depth +full:- +full:bits
1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
10 - Sudeep Holla <[email protected]>
11 - Cristian Marussi <[email protected]>
27 - Configure the MHU
28 - Send Transfers to the Receiver
29 - Optionally receive acknowledgment of a Transfer from the Receiver
32 - Configure the MHU
33 - Receive Transfers from the Sender
34 - Optionally acknowledge Transfers sent by the Sender
48 - Doorbell Extension (DBE): DBE defines a type of channel called a Doorbell
53 order and discoverable at run-time.
58 Optionally, data may be transmitted through an out-of-band shared memory
62 - FastChannel Extension (FCE): FCE defines a type of channel called a Fast
73 MHU can support is between 1-1024, if the FastChannel word-size is 32-bits,
74 or between 1-512, when the FastChannel word-size is 64-bits.
76 Note that the number of FCHs and the word-size are implementation defined,
77 not configurable but discoverable at run-time.
78 Optionally, data may be transmitted through an out-of-band shared memory
80 mechanism which carries also a pointer to such out-of-band data, but this
83 - FIFO Extension (FE): FE defines a Channel type called a FIFO Channel (FFCH).
85 - Multiple Transfers to the Receiver without having to wait for the
87 FIFO has room for the Transfer.
88 - Transfers which require the Receiver to provide acknowledgment.
89 - Transfers which have in-band payload.
94 order. The number of FFCHs, their depth (same for all implemented FFCHs) and
95 the access-granularity are implementation defined, not configurable but
96 discoverable at run-time.
97 Optionally, additional data may be transmitted through an out-of-band shared
98 memory region, wherein the MHU FIFO is used to transmit, in order, a small
114 interrupt-names:
120 extensions. All interrupts of the MHU are level-sensitive.
121 Some of these optional interrupts are defined per-channel, where the
123 run-time discoverable.
124 In the following names are enumerated using patterns, with per-channel
132 - combined
133 - mbx-fch-xfer-<N> but only if mbx-fcgrp-xfer-<N> is not implemented.
139 - const: combined
141 - const: combined-ffch
142 description: PBX/MBX FIFO Combined interrupt
143 - pattern: '^ffch-low-tide-[0-9]+$'
144 description: PBX/MBX FIFO Channel <N> Low Tide interrupt
145 - pattern: '^ffch-high-tide-[0-9]+$'
146 description: PBX/MBX FIFO Channel <N> High Tide interrupt
147 - pattern: '^ffch-flush-[0-9]+$'
148 description: PBX/MBX FIFO Channel <N> Flush interrupt
149 - pattern: '^mbx-dbch-xfer-[0-9]+$'
151 - pattern: '^mbx-fch-xfer-[0-9]+$'
153 - pattern: '^mbx-fchgrp-xfer-[0-9]+$'
155 - pattern: '^mbx-ffch-xfer-[0-9]+$'
156 description: MBX FIFO Channel <N> Transfer interrupt
157 - pattern: '^pbx-dbch-xfer-ack-[0-9]+$'
159 - pattern: '^pbx-ffch-xfer-ack-[0-9]+$'
160 description: PBX FIFO Channel <N> Transfer Ack interrupt
162 '#mbox-cells':
168 Extension types constants are defined in <dt-bindings/arm/mhuv3-dt.h>.
179 mboxes = <&mhu FE_EXT 1 0>; // FE, FIFO Channel Window 1.
180 mboxes = <&mhu FE_EXT 7 0>; // FE, FIFO Channel Window 7.
187 - compatible
188 - reg
189 - interrupts
190 - interrupt-names
191 - '#mbox-cells'
196 - |
197 #include <dt-bindings/interrupt-controller/arm-gic.h>
200 #address-cells = <2>;
201 #size-cells = <2>;
205 #mbox-cells = <3>;
208 interrupt-names = "combined", "pbx-dbch-xfer-ack-1",
209 "ffch-high-tide-0";
216 #mbox-cells = <3>;
219 interrupt-names = "combined", "mbx-dbch-xfer-1", "ffch-low-tide-0";