aspeed,sgpio.yaml

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    1 # SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause)
    2 %YAML 1.2
    3 ---
    4 $id: http://devicetree.org/schemas/gpio/aspeed,sgpio.yaml#
    5 $schema: http://devicetree.org/meta-schemas/core.yaml#
    6 
    7 title: Aspeed SGPIO controller
    8 
    9 maintainers:
   10   - Andrew Jeffery <andrew@aj.id.au>
   11 
   12 description:
   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
   21     divided by a programmable value.
   22   - Co-work with external signal-chained TTL components (74LV165/74LV595)
   23 
   24 properties:
   25   compatible:
   26     enum:
   27       - aspeed,ast2400-sgpio
   28       - aspeed,ast2500-sgpio
   29       - aspeed,ast2600-sgpiom
   30 
   31   reg:
   32     maxItems: 1
   33 
   34   gpio-controller: true
   35 
   36   '#gpio-cells':
   37     const: 2
   38 
   39   interrupts:
   40     maxItems: 1
   41 
   42   interrupt-controller: true
   43 
   44   clocks:
   45     maxItems: 1
   46 
   47   ngpios: true
   48 
   49   bus-frequency: true
   50 
   51 required:
   52   - compatible
   53   - reg
   54   - gpio-controller
   55   - '#gpio-cells'
   56   - interrupts
   57   - interrupt-controller
   58   - ngpios
   59   - clocks
   60   - bus-frequency
   61 
   62 additionalProperties: false
   63 
   64 examples:
   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;
   71         interrupts = <40>;
   72         reg = <0x1e780200 0x0100>;
   73         clocks = <&syscon ASPEED_CLK_APB>;
   74         interrupt-controller;
   75         ngpios = <80>;
   76         bus-frequency = <12000000>;
   77     };

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FreeBSD/Linux Kernel Cross Reference sys/contrib/device-tree/Bindings/gpio/aspeed,sgpio.yaml

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sys/contrib/device-tree/Bindings/gpio/aspeed,sgpio.yaml