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+# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
+%YAML 1.2
+---
+$id: http://devicetree.org/schemas/leds/leds-bcm6328.yaml#
+$schema: http://devicetree.org/meta-schemas/core.yaml#
+
+title: LEDs connected to Broadcom BCM6328 controller
+
+maintainers:
+ - Álvaro Fernández Rojas <noltari@gmail.com>
+
+description: |
+ This controller is present on BCM6318, BCM6328, BCM6362 and BCM63268.
+ In these SoCs it's possible to control LEDs both as GPIOs or by hardware.
+ However, on some devices there are Serial LEDs (LEDs connected to a 74x164
+ controller), which can either be controlled by software (exporting the 74x164
+ as spi-gpio. See
+ Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml), or by hardware
+ using this driver.
+ Some of these Serial LEDs are hardware controlled (e.g. ethernet LEDs) and
+ exporting the 74x164 as spi-gpio prevents those LEDs to be hardware
+ controlled, so the only chance to keep them working is by using this driver.
+
+ BCM6328 LED controller has a HWDIS register, which controls whether a LED
+ should be controlled by a hardware signal instead of the MODE register value,
+ with 0 meaning hardware control enabled and 1 hardware control disabled. This
+ is usually 1:1 for hardware to LED signals, but through the activity/link
+ registers you have some limited control over rerouting the LEDs (as
+ explained later in brcm,link-signal-sources). Even if a LED is hardware
+ controlled you are still able to make it blink or light it up if it isn't,
+ but you can't turn it off if the hardware decides to light it up. For this
+ reason, hardware controlled LEDs aren't registered as LED class devices.
+
+ Each LED is represented as a sub-node of the brcm,bcm6328-leds device.
+
+properties:
+ compatible:
+ const: brcm,bcm6328-leds
+
+ reg:
+ maxItems: 1
+
+ brcm,serial-leds:
+ type: boolean
+ description: Enables Serial LEDs.
+
+ brcm,serial-mux:
+ type: boolean
+ description: Enables Serial LEDs multiplexing.
+
+ brcm,serial-clk-low:
+ type: boolean
+ description: Makes clock signal active low.
+
+ brcm,serial-dat-low:
+ type: boolean
+ description: Makes data signal active low.
+
+ brcm,serial-shift-inv:
+ type: boolean
+ description: Inverts Serial LEDs shift direction.
+
+ "#address-cells":
+ const: 1
+
+ "#size-cells":
+ const: 0
+
+patternProperties:
+ "@[a-f0-9]+$":
+ type: object
+
+ $ref: common.yaml#
+
+ properties:
+ reg:
+ items:
+ - maximum: 23
+ description: LED pin number (only LEDs 0 to 23 are valid).
+
+ active-low:
+ type: boolean
+ description: Makes LED active low.
+
+ brcm,hardware-controlled:
+ type: boolean
+ description: Makes this LED hardware controlled.
+
+ brcm,link-signal-sources:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 4
+ description: >
+ An array of hardware link signal sources. Up to four link hardware
+ signals can get muxed into these LEDs. Only valid for LEDs 0 to 7,
+ where LED signals 0 to 3 may be muxed to LEDs 0 to 3, and signals 4 to
+ 7 may be muxed to LEDs 4 to 7. A signal can be muxed to more than one
+ LED, and one LED can have more than one source signal.
+
+ brcm,activity-signal-sources:
+ $ref: /schemas/types.yaml#/definitions/uint32-array
+ minItems: 1
+ maxItems: 4
+ description: >
+ An array of hardware activity signal sources. Up to four activity
+ hardware signals can get muxed into these LEDs. Only valid for LEDs 0
+ to 7, where LED signals 0 to 3 may be muxed to LEDs 0 to 3, and
+ signals 4 to 7 may be muxed to LEDs 4 to 7. A signal can be muxed to
+ more than one LED, and one LED can have more than one source signal.
+
+ required:
+ - reg
+
+ unevaluatedProperties: false
+
+required:
+ - reg
+ - "#address-cells"
+ - "#size-cells"
+
+additionalProperties: false
+
+examples:
+ - |
+ /* BCM6328 with 4 EPHY LEDs */
+ led-controller@10000800 {
+ compatible = "brcm,bcm6328-leds";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x10000800 0x24>;
+
+ alarm_red@2 {
+ reg = <2>;
+ active-low;
+ label = "red:alarm";
+ };
+
+ inet_green@3 {
+ reg = <3>;
+ active-low;
+ label = "green:inet";
+ };
+
+ power_green@4 {
+ reg = <4>;
+ active-low;
+ label = "green:power";
+ default-state = "on";
+ };
+
+ ephy0_spd@17 {
+ reg = <17>;
+ brcm,hardware-controlled;
+ };
+
+ ephy1_spd@18 {
+ reg = <18>;
+ brcm,hardware-controlled;
+ };
+
+ ephy2_spd@19 {
+ reg = <19>;
+ brcm,hardware-controlled;
+ };
+
+ ephy3_spd@20 {
+ reg = <20>;
+ brcm,hardware-controlled;
+ };
+ };
+ - |
+ /* BCM63268 with Serial/GPHY0 LEDs */
+ led-controller@10001900 {
+ compatible = "brcm,bcm6328-leds";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x10001900 0x24>;
+ brcm,serial-leds;
+ brcm,serial-dat-low;
+ brcm,serial-shift-inv;
+
+ gphy0_spd0@0 {
+ reg = <0>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <0>;
+ };
+
+ gphy0_spd1@1 {
+ reg = <1>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <1>;
+ };
+
+ inet_red@2 {
+ reg = <2>;
+ active-low;
+ label = "red:inet";
+ };
+
+ dsl_green@3 {
+ reg = <3>;
+ active-low;
+ label = "green:dsl";
+ };
+
+ usb_green@4 {
+ reg = <4>;
+ active-low;
+ label = "green:usb";
+ };
+
+ wps_green@7 {
+ reg = <7>;
+ active-low;
+ label = "green:wps";
+ };
+
+ inet_green@8 {
+ reg = <8>;
+ active-low;
+ label = "green:inet";
+ };
+
+ ephy0_act@9 {
+ reg = <9>;
+ brcm,hardware-controlled;
+ };
+
+ ephy1_act@10 {
+ reg = <10>;
+ brcm,hardware-controlled;
+ };
+
+ ephy2_act@11 {
+ reg = <11>;
+ brcm,hardware-controlled;
+ };
+
+ gphy0_act@12 {
+ reg = <12>;
+ brcm,hardware-controlled;
+ };
+
+ ephy0_spd@13 {
+ reg = <13>;
+ brcm,hardware-controlled;
+ };
+
+ ephy1_spd@14 {
+ reg = <14>;
+ brcm,hardware-controlled;
+ };
+
+ ephy2_spd@15 {
+ reg = <15>;
+ brcm,hardware-controlled;
+ };
+
+ power_green@20 {
+ reg = <20>;
+ active-low;
+ label = "green:power";
+ default-state = "on";
+ };
+ };
+ - |
+ /* BCM6362 with 1 LED for each EPHY */
+ led-controller@10001900 {
+ compatible = "brcm,bcm6328-leds";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x10001900 0x24>;
+
+ usb@0 {
+ reg = <0>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <0>;
+ brcm,activity-signal-sources = <0>;
+ /* USB link/activity routed to USB LED */
+ };
+
+ inet@1 {
+ reg = <1>;
+ brcm,hardware-controlled;
+ brcm,activity-signal-sources = <1>;
+ /* INET activity routed to INET LED */
+ };
+
+ ephy0@4 {
+ reg = <4>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <4>;
+ /* EPHY0 link routed to EPHY0 LED */
+ };
+
+ ephy1@5 {
+ reg = <5>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <5>;
+ /* EPHY1 link routed to EPHY1 LED */
+ };
+
+ ephy2@6 {
+ reg = <6>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <6>;
+ /* EPHY2 link routed to EPHY2 LED */
+ };
+
+ ephy3@7 {
+ reg = <7>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <7>;
+ /* EPHY3 link routed to EPHY3 LED */
+ };
+
+ power_green@20 {
+ reg = <20>;
+ active-low;
+ label = "green:power";
+ default-state = "on";
+ };
+ };
+ - |
+ /* BCM6362 with 1 LED for all EPHYs */
+ led-controller@10001900 {
+ compatible = "brcm,bcm6328-leds";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x10001900 0x24>;
+
+ usb@0 {
+ reg = <0>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <0 1>;
+ brcm,activity-signal-sources = <0 1>;
+ /* USB/INET link/activity routed to USB LED */
+ };
+
+ ephy@4 {
+ reg = <4>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <4 5 6 7>;
+ /* EPHY0/1/2/3 link routed to EPHY0 LED */
+ };
+
+ power_green@20 {
+ reg = <20>;
+ active-low;
+ label = "green:power";
+ default-state = "on";
+ };
+ };
+ - |
+ /* BCM6362 with EPHY LEDs swapped */
+ led-controller@10001900 {
+ compatible = "brcm,bcm6328-leds";
+ #address-cells = <1>;
+ #size-cells = <0>;
+ reg = <0x10001900 0x24>;
+
+ usb@0 {
+ reg = <0>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <0>;
+ brcm,activity-signal-sources = <0 1>;
+ /* USB link/act and INET act routed to USB LED */
+ };
+
+ ephy0@4 {
+ reg = <4>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <7>;
+ /* EPHY3 link routed to EPHY0 LED */
+ };
+
+ ephy1@5 {
+ reg = <5>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <6>;
+ /* EPHY2 link routed to EPHY1 LED */
+ };
+
+ ephy2@6 {
+ reg = <6>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <5>;
+ /* EPHY1 link routed to EPHY2 LED */
+ };
+
+ ephy3@7 {
+ reg = <7>;
+ brcm,hardware-controlled;
+ brcm,link-signal-sources = <4>;
+ /* EPHY0 link routed to EPHY3 LED */
+ };
+
+ power_green@20 {
+ reg = <20>;
+ active-low;
+ label = "green:power";
+ default-state = "on";
+ };
+ };