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| author |   Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com> | 2017-11-02 14:17:12 -0400 |
|---|---|---|
| committer |   Arnd Bergmann <arnd@arndb.de> | 2017-11-07 16:27:36 +0100 |
| commit | ec473a9c40416ef1802088e9f9d44d40c16aac6a (patch) | |
| tree | 2cee5bb275913b515343bd8519ab85c3a08d3486 /Documentation/devicetree/bindings/bus/ts-nbus.txt | |
| parent | Merge tag 'v4.15-rockchip-dts64-2' of ssh://gitolite.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into next/dt (diff) | |
| download | linux-dev-ec473a9c40416ef1802088e9f9d44d40c16aac6a.tar.xz linux-dev-ec473a9c40416ef1802088e9f9d44d40c16aac6a.zip | |
dt-bindings: bus: Add documentation for the Technologic Systems NBUS
Add binding documentation for the Technologic Systems NBUS that is used
to interface with peripherals in the FPGA of the TS-4600 SoM.
Signed-off-by: Sebastien Bourdelin <sebastien.bourdelin@savoirfairelinux.com>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Diffstat (limited to 'Documentation/devicetree/bindings/bus/ts-nbus.txt')
| -rw-r--r-- | Documentation/devicetree/bindings/bus/ts-nbus.txt | 50 |
1 files changed, 50 insertions, 0 deletions
diff --git a/Documentation/devicetree/bindings/bus/ts-nbus.txt b/Documentation/devicetree/bindings/bus/ts-nbus.txt new file mode 100644 index 000000000000..2a10d065b9fa --- /dev/null +++ b/Documentation/devicetree/bindings/bus/ts-nbus.txt @@ -0,0 +1,50 @@ +Technologic Systems NBUS + +The NBUS is a bus used to interface with peripherals in the Technologic +Systems FPGA on the TS-4600 SoM. + +Required properties : + - compatible : "technologic,ts-nbus" + - #address-cells : must be 1 + - #size-cells : must be 0 + - pwms : The PWM bound to the FPGA + - ts,data-gpios : The 8 GPIO pins connected to the data lines on the FPGA + - ts,csn-gpios : The GPIO pin connected to the csn line on the FPGA + - ts,txrx-gpios : The GPIO pin connected to the txrx line on the FPGA + - ts,strobe-gpios : The GPIO pin connected to the stobe line on the FPGA + - ts,ale-gpios : The GPIO pin connected to the ale line on the FPGA + - ts,rdy-gpios : The GPIO pin connected to the rdy line on the FPGA + +Child nodes: + +The NBUS node can contain zero or more child nodes representing peripherals +on the bus. + +Example: + + nbus { + compatible = "technologic,ts-nbus"; + pinctrl-0 = <&nbus_pins>; + #address-cells = <1>; + #size-cells = <0>; + pwms = <&pwm 2 83>; + ts,data-gpios = <&gpio0 0 GPIO_ACTIVE_HIGH + &gpio0 1 GPIO_ACTIVE_HIGH + &gpio0 2 GPIO_ACTIVE_HIGH + &gpio0 3 GPIO_ACTIVE_HIGH + &gpio0 4 GPIO_ACTIVE_HIGH + &gpio0 5 GPIO_ACTIVE_HIGH + &gpio0 6 GPIO_ACTIVE_HIGH + &gpio0 7 GPIO_ACTIVE_HIGH>; + ts,csn-gpios = <&gpio0 16 GPIO_ACTIVE_HIGH>; + ts,txrx-gpios = <&gpio0 24 GPIO_ACTIVE_HIGH>; + ts,strobe-gpios = <&gpio0 25 GPIO_ACTIVE_HIGH>; + ts,ale-gpios = <&gpio0 26 GPIO_ACTIVE_HIGH>; + ts,rdy-gpios = <&gpio0 21 GPIO_ACTIVE_HIGH>; + + watchdog@2a { + compatible = "..."; + + /* ... */ + }; + }; |