bindings/gpio/aspeed%2Csgpio.yaml

1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
3 ---
4 $id: http://devicetree.org/schemas/gpio/aspeed,sgpio.yaml#
5 $schema: http://devicetree.org/meta-schemas/core.yaml#
7 title: Aspeed SGPIO controller
10   - Andrew Jeffery <andrew@aj.id.au>
13   This SGPIO controller is for ASPEED AST2400, AST2500 and AST2600 SoC,
14   AST2600 have two sgpio master one with 128 pins another one with 80 pins,
15   AST2500/AST2400 have one sgpio master with 80 pins. Each of the Serial
16   GPIO pins can be programmed to support the following options
17   - Support interrupt option for each input port and various interrupt
18     sensitivity option (level-high, level-low, edge-high, edge-low)
19   - Support reset tolerance option for each output port
20   - Directly connected to APB bus and its shift clock is from APB bus clock
22   - Co-work with external signal-chained TTL components (74LV165/74LV595)
27       - aspeed,ast2400-sgpio
28       - aspeed,ast2500-sgpio
29       - aspeed,ast2600-sgpiom
34   gpio-controller: true
36   '#gpio-cells':
42   interrupt-controller: true
49   bus-frequency: true
52   - compatible
53   - reg
54   - gpio-controller
55   - '#gpio-cells'
56   - interrupts
57   - interrupt-controller
58   - ngpios
59   - clocks
60   - bus-frequency
65   - |
66     #include <dt-bindings/clock/aspeed-clock.h>
67     sgpio: sgpio@1e780200 {
68         #gpio-cells = <2>;
69         compatible = "aspeed,ast2500-sgpio";
70         gpio-controller;
74         interrupt-controller;
76         bus-frequency = <12000000>;