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-rw-r--r-- | Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt | 68 |
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diff --git a/Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt b/Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt new file mode 100644 index 000000000..4346ff2dd --- /dev/null +++ b/Documentation/devicetree/bindings/pinctrl/cortina,gemini-pinctrl.txt @@ -0,0 +1,68 @@ +Cortina Systems Gemini pin controller + +This pin controller is found in the Cortina Systems Gemini SoC family, +see further arm/gemini.txt. It is a purely group-based multiplexing pin +controller. + +The pin controller node must be a subnode of the system controller node. + +Required properties: +- compatible: "cortina,gemini-pinctrl" + +Subnodes of the pin controller contain pin control multiplexing set-up +and pin configuration of individual pins. + +Please refer to pinctrl-bindings.txt for generic pin multiplexing nodes +and generic pin config nodes. + +Supported configurations: +- skew-delay is supported on the Ethernet pins +- drive-strength with 4, 8, 12 or 16 mA as argument is supported for + entire groups on the groups "idegrp", "gmii_gmac0_grp", "gmii_gmac1_grp" + and "pcigrp". + +Example: + + +syscon { + compatible = "cortina,gemini-syscon"; + ... + pinctrl { + compatible = "cortina,gemini-pinctrl"; + pinctrl-names = "default"; + pinctrl-0 = <&dram_default_pins>, <&system_default_pins>, + <&vcontrol_default_pins>; + + dram_default_pins: pinctrl-dram { + mux { + function = "dram"; + groups = "dramgrp"; + }; + }; + rtc_default_pins: pinctrl-rtc { + mux { + function = "rtc"; + groups = "rtcgrp"; + }; + }; + power_default_pins: pinctrl-power { + mux { + function = "power"; + groups = "powergrp"; + }; + }; + system_default_pins: pinctrl-system { + mux { + function = "system"; + groups = "systemgrp"; + }; + }; + (...) + uart_default_pins: pinctrl-uart { + mux { + function = "uart"; + groups = "uartrxtxgrp"; + }; + }; + }; +}; |