On Mon, Apr 17, 2017 at 09:29:41PM +0200, Hauke Mehrtens wrote:
> 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).
This should come before the other patches.
>
> Signed-off-by: Hauke Mehrtens <hauke@xxxxxxxxxx>
> ---
> .../devicetree/bindings/mips/lantiq/rcu.txt | 82 ++++++++++++++++++++++
> 1 file changed, 82 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..9e5b1e7493e4
> --- /dev/null
> +++ b/Documentation/devicetree/bindings/mips/lantiq/rcu.txt
> @@ -0,0 +1,82 @@
> +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.
> +
> +
> +-------------------------------------------------------------------------------
> +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 = "simple-mfd", "syscon";
Needs an SoC specific compatible string here.
> + reg = <0x203000 0x100>;
> + big-endian;
> +
> + gphy0: rcu_gphy@0 {
> + compatible = "lantiq,xrx200a2x-rcu-gphy";
> + lantiq,rcu-syscon = <&rcu0 0x20>;
So these are already child nodes. You can get rid of this and use
reg/ranges instead.
> + resets = <&rcu_reset0 31>;
> + reset-names = "gphy";
> + lantiq,gphy-mode = <GPHY_MODE_GE>;
> + clocks = <&pmu0 XRX200_PMU_GATE_GPHY>;
> + clock-names = "gphy";
> + };
> +
> + gphy1: rcu_gphy@1 {
> + compatible = "lantiq,xrx200a2x-rcu-gphy";
> + lantiq,rcu-syscon = <&rcu0 0x68>;
> + resets = <&rcu_reset0 29>;
> + reset-names = "gphy";
> + lantiq,gphy-mode = <GPHY_MODE_FE>;
> + clocks = <&pmu0 XRX200_PMU_GATE_GPHY>;
> + clock-names = "gphy";
> + };
> +
> + rcu_reset0: rcu_reset@0 {
> + compatible = "lantiq,rcu-reset";
> + lantiq,rcu-syscon = <&rcu0 0x10 0x14>;
> + #reset-cells = <1>;
> + reset-request = <31>, <29>, <21>, <19>, <16>, <12>;
> + reset-status = <30>, <28>, <16>, <25>, <5>, <24>;
> + };
> +
> + rcu_reset1: rcu_reset@1 {
> + compatible = "lantiq,rcu-reset";
> + lantiq,rcu-syscon = <&rcu0 0x48 0x24>;
> + #reset-cells = <1>;
> + };
> +
> + usb_phys0: rcu-usb2-phy@0 {
> + compatible = "lantiq,xrx200-rcu-usb2-phy";
> +
> + lantiq,rcu-syscon = <&rcu0 0x18 0x38>;
> + resets = <&rcu_reset1 4>, <&rcu_reset0 4>;
> + reset-names = "phy", "ctrl";
> + #phy-cells = <0>;
> + };
> +
> + usb_phys1: rcu-usb2-phy@1 {
> + compatible = "lantiq,xrx200-rcu-usb2-phy";
> +
> + lantiq,rcu-syscon = <&rcu0 0x34 0x3C>;
> + resets = <&rcu_reset1 5>, <&rcu_reset0 4>;
> + reset-names = "phy", "ctrl";
> + #phy-cells = <0>;
> + };
> +
> + reboot {
> + compatible = "syscon-reboot";
> + regmap = <&rcu0>;
> + offset = <0x10>;
> + mask = <0x40000000>;
> + };
> +
> + /* more sub-device nodes (USB PHY, etc.) */
> + };
> +
> --
> 2.11.0
>
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