| # 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). |
| |
| 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"; |
| }; |
| }; |
