From: Martin Blumenstingl <martin.blumenstingl@xxxxxxxxxxxxxx> This adds the initial documentation for the RCU module (a MFD device which provides USB PHYs, reset controllers and more). The RCU register range is used for multiple purposes. Mostly one device uses one or multiple register exclusively, but for some registers some bits are for one driver and some other bits are for a different driver. With this patch all accesses to the RCU registers will go through syscon. Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx> --- .../devicetree/bindings/mips/lantiq/rcu.txt | 97 ++++++++++++++++++++++ 1 file changed, 97 insertions(+) create mode 100644 Documentation/devicetree/bindings/mips/lantiq/rcu.txt diff --git a/Documentation/devicetree/bindings/mips/lantiq/rcu.txt b/Documentation/devicetree/bindings/mips/lantiq/rcu.txt new file mode 100644 index 000000000000..3e2461262218 --- /dev/null +++ b/Documentation/devicetree/bindings/mips/lantiq/rcu.txt @@ -0,0 +1,97 @@ +Lantiq XWAY SoC RCU binding +=========================== + +This binding describes the RCU (reset controller unit) multifunction device, +where each sub-device has it's own set of registers. + +The RCU register range is used for multiple purposes. Mostly one device +uses one or multiple register exclusively, but for some registers some +bits are for one driver and some other bits are for a different driver. +With this patch all accesses to the RCU registers will go through +syscon. + + +------------------------------------------------------------------------------- +Required properties: +- compatible : The first and second values must be: "simple-mfd", "syscon" +- reg : The address and length of the system control registers + + +------------------------------------------------------------------------------- +Example of the RCU bindings on a xRX200 SoC: + rcu0: rcu@203000 { + compatible = "lantiq,rcu-xrx200", "simple-mfd", "syscon"; + reg = <0x203000 0x100>; + big-endian; + + gphy0: gphy@0 { + compatible = "lantiq,xrx200a2x-rcu-gphy"; + + regmap = <&rcu0>; + offset = <0x20>; + resets = <&reset0 31 30>, <&reset1 7 7>; + reset-names = "gphy", "gphy2"; + lantiq,gphy-mode = <GPHY_MODE_GE>; + }; + + gphy1: gphy@1 { + compatible = "lantiq,xrx200a2x-rcu-gphy"; + + regmap = <&rcu0>; + offset = <0x68>; + resets = <&reset0 29 28>, <&reset1 6 6>; + reset-names = "gphy", "gphy2"; + lantiq,gphy-mode = <GPHY_MODE_GE>; + }; + + reset0: reset-controller@0 { + compatible = "lantiq,rcu-reset"; + + regmap = <&rcu0>; + offset-set = <0x10>; + offset-status = <0x14>; + #reset-cells = <2>; + }; + + reset1: reset-controller@1 { + compatible = "lantiq,rcu-reset"; + + regmap = <&rcu0>; + offset-set = <0x48>; + offset-status = <0x24>; + #reset-cells = <2>; + }; + + usb_phy0: usb2-phy@0 { + compatible = "lantiq,xrx200-rcu-usb2-phy"; + status = "disabled"; + + regmap = <&rcu0>; + offset-phy = <0x18>; + offset-ana = <0x38>; + resets = <&reset1 4 4>, <&reset0 4 4>; + reset-names = "phy", "ctrl"; + #phy-cells = <0>; + }; + + usb_phy1: usb2-phy@1 { + compatible = "lantiq,xrx200-rcu-usb2-phy"; + status = "disabled"; + + regmap = <&rcu0>; + offset-phy = <0x34>; + offset-ana = <0x3C>; + resets = <&reset1 5 4>, <&reset0 4 4>; + reset-names = "phy", "ctrl"; + #phy-cells = <0>; + }; + + reboot { + compatible = "syscon-reboot"; + + regmap = <&rcu0>; + offset = <0x10>; + mask = <0x40000000>; + }; + }; + -- 2.11.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html