dt-bindings: leds: convert BCM6328 controller to the json-schema
This helps validating DTS files. Signed-off-by: Rafał Miłecki <rafal@milecki.pl> Link: https://lore.kernel.org/r/20211114225416.3174-1-zajec5@gmail.com Signed-off-by: Rob Herring <robh@kernel.org>
This commit is contained in:
Rafał Miłecki
Rob Herring
parent
5b4afd00fc
commit
af3f33751d
@ -1,319 +0,0 @@
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LEDs connected to Broadcom BCM6328 controller
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This controller is present on BCM6318, BCM6328, BCM6362 and BCM63268.
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In these SoCs it's possible to control LEDs both as GPIOs or by hardware.
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However, on some devices there are Serial LEDs (LEDs connected to a 74x164
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controller), which can either be controlled by software (exporting the 74x164
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as spi-gpio. See Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml),
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or by hardware using this driver.
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Some of these Serial LEDs are hardware controlled (e.g. ethernet LEDs) and
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exporting the 74x164 as spi-gpio prevents those LEDs to be hardware
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controlled, so the only chance to keep them working is by using this driver.
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BCM6328 LED controller has a HWDIS register, which controls whether a LED
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should be controlled by a hardware signal instead of the MODE register value,
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with 0 meaning hardware control enabled and 1 hardware control disabled. This
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is usually 1:1 for hardware to LED signals, but through the activity/link
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registers you have some limited control over rerouting the LEDs (as
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explained later in brcm,link-signal-sources). Even if a LED is hardware
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controlled you are still able to make it blink or light it up if it isn't,
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but you can't turn it off if the hardware decides to light it up. For this
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reason, hardware controlled LEDs aren't registered as LED class devices.
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Required properties:
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- compatible : should be "brcm,bcm6328-leds".
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- #address-cells : must be 1.
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- #size-cells : must be 0.
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- reg : BCM6328 LED controller address and size.
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Optional properties:
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- brcm,serial-leds : Boolean, enables Serial LEDs.
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Default : false
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- brcm,serial-mux : Boolean, enables Serial LEDs multiplexing.
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Default : false
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- brcm,serial-clk-low : Boolean, makes clock signal active low.
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Default : false
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- brcm,serial-dat-low : Boolean, makes data signal active low.
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Default : false
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- brcm,serial-shift-inv : Boolean, inverts Serial LEDs shift direction.
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Default : false
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Each LED is represented as a sub-node of the brcm,bcm6328-leds device.
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LED sub-node required properties:
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- reg : LED pin number (only LEDs 0 to 23 are valid).
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LED sub-node optional properties:
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a) Optional properties for sub-nodes related to software controlled LEDs:
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- label : see Documentation/devicetree/bindings/leds/common.txt
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- active-low : Boolean, makes LED active low.
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Default : false
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- default-state : see
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Documentation/devicetree/bindings/leds/common.txt
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- linux,default-trigger : see
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Documentation/devicetree/bindings/leds/common.txt
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b) Optional properties for sub-nodes related to hardware controlled LEDs:
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- brcm,hardware-controlled : Boolean, makes this LED hardware controlled.
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Default : false
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- brcm,link-signal-sources : An array of hardware link
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signal sources. Up to four link hardware signals can get muxed into
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these LEDs. Only valid for LEDs 0 to 7, where LED signals 0 to 3 may
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be muxed to LEDs 0 to 3, and signals 4 to 7 may be muxed to LEDs
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4 to 7. A signal can be muxed to more than one LED, and one LED can
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have more than one source signal.
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- brcm,activity-signal-sources : An array of hardware activity
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signal sources. Up to four activity hardware signals can get muxed into
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these LEDs. Only valid for LEDs 0 to 7, where LED signals 0 to 3 may
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be muxed to LEDs 0 to 3, and signals 4 to 7 may be muxed to LEDs
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4 to 7. A signal can be muxed to more than one LED, and one LED can
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have more than one source signal.
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Examples:
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Scenario 1 : BCM6328 with 4 EPHY LEDs
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leds0: led-controller@10000800 {
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compatible = "brcm,bcm6328-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x10000800 0x24>;
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alarm_red@2 {
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reg = <2>;
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active-low;
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label = "red:alarm";
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};
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inet_green@3 {
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reg = <3>;
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active-low;
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label = "green:inet";
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};
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power_green@4 {
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reg = <4>;
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active-low;
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label = "green:power";
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default-state = "on";
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};
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ephy0_spd@17 {
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reg = <17>;
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brcm,hardware-controlled;
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};
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ephy1_spd@18 {
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reg = <18>;
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brcm,hardware-controlled;
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};
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ephy2_spd@19 {
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reg = <19>;
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brcm,hardware-controlled;
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};
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ephy3_spd@20 {
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reg = <20>;
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brcm,hardware-controlled;
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};
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};
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Scenario 2 : BCM63268 with Serial/GPHY0 LEDs
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leds0: led-controller@10001900 {
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compatible = "brcm,bcm6328-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x10001900 0x24>;
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brcm,serial-leds;
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brcm,serial-dat-low;
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brcm,serial-shift-inv;
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gphy0_spd0@0 {
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reg = <0>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <0>;
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};
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gphy0_spd1@1 {
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reg = <1>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <1>;
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};
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inet_red@2 {
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reg = <2>;
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active-low;
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label = "red:inet";
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};
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dsl_green@3 {
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reg = <3>;
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active-low;
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label = "green:dsl";
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};
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usb_green@4 {
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reg = <4>;
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active-low;
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label = "green:usb";
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};
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wps_green@7 {
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reg = <7>;
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active-low;
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label = "green:wps";
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};
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inet_green@8 {
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reg = <8>;
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active-low;
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label = "green:inet";
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};
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ephy0_act@9 {
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reg = <9>;
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brcm,hardware-controlled;
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};
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ephy1_act@10 {
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reg = <10>;
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brcm,hardware-controlled;
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};
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ephy2_act@11 {
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reg = <11>;
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brcm,hardware-controlled;
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};
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gphy0_act@12 {
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reg = <12>;
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brcm,hardware-controlled;
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};
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ephy0_spd@13 {
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reg = <13>;
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brcm,hardware-controlled;
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};
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ephy1_spd@14 {
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reg = <14>;
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brcm,hardware-controlled;
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};
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ephy2_spd@15 {
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reg = <15>;
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brcm,hardware-controlled;
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};
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power_green@20 {
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reg = <20>;
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active-low;
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label = "green:power";
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default-state = "on";
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};
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};
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Scenario 3 : BCM6362 with 1 LED for each EPHY
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leds0: led-controller@10001900 {
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compatible = "brcm,bcm6328-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x10001900 0x24>;
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usb@0 {
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reg = <0>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <0>;
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brcm,activity-signal-sources = <0>;
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/* USB link/activity routed to USB LED */
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};
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inet@1 {
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reg = <1>;
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brcm,hardware-controlled;
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brcm,activity-signal-sources = <1>;
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/* INET activity routed to INET LED */
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};
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ephy0@4 {
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reg = <4>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <4>;
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/* EPHY0 link routed to EPHY0 LED */
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};
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ephy1@5 {
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reg = <5>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <5>;
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/* EPHY1 link routed to EPHY1 LED */
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};
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ephy2@6 {
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reg = <6>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <6>;
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/* EPHY2 link routed to EPHY2 LED */
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};
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ephy3@7 {
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reg = <7>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <7>;
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/* EPHY3 link routed to EPHY3 LED */
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};
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power_green@20 {
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reg = <20>;
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active-low;
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label = "green:power";
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default-state = "on";
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};
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};
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Scenario 4 : BCM6362 with 1 LED for all EPHYs
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leds0: led-controller@10001900 {
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compatible = "brcm,bcm6328-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x10001900 0x24>;
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usb@0 {
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reg = <0>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <0 1>;
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brcm,activity-signal-sources = <0 1>;
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/* USB/INET link/activity routed to USB LED */
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};
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ephy@4 {
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reg = <4>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <4 5 6 7>;
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/* EPHY0/1/2/3 link routed to EPHY0 LED */
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};
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power_green@20 {
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reg = <20>;
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active-low;
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label = "green:power";
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default-state = "on";
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};
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};
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Scenario 5 : BCM6362 with EPHY LEDs swapped
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leds0: led-controller@10001900 {
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compatible = "brcm,bcm6328-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x10001900 0x24>;
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usb@0 {
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reg = <0>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <0>;
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brcm,activity-signal-sources = <0 1>;
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/* USB link/act and INET act routed to USB LED */
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};
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ephy0@4 {
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reg = <4>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <7>;
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/* EPHY3 link routed to EPHY0 LED */
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};
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ephy1@5 {
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reg = <5>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <6>;
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/* EPHY2 link routed to EPHY1 LED */
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};
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ephy2@6 {
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reg = <6>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <5>;
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/* EPHY1 link routed to EPHY2 LED */
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};
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ephy3@7 {
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reg = <7>;
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brcm,hardware-controlled;
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brcm,link-signal-sources = <4>;
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/* EPHY0 link routed to EPHY3 LED */
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};
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power_green@20 {
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reg = <20>;
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active-low;
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label = "green:power";
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default-state = "on";
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};
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};
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404
Documentation/devicetree/bindings/leds/leds-bcm6328.yaml
Normal file
404
Documentation/devicetree/bindings/leds/leds-bcm6328.yaml
Normal file
@ -0,0 +1,404 @@
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# SPDX-License-Identifier: GPL-2.0-only OR BSD-2-Clause
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%YAML 1.2
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---
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$id: http://devicetree.org/schemas/leds/leds-bcm6328.yaml#
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$schema: http://devicetree.org/meta-schemas/core.yaml#
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title: LEDs connected to Broadcom BCM6328 controller
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maintainers:
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- Álvaro Fernández Rojas <noltari@gmail.com>
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description: |
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This controller is present on BCM6318, BCM6328, BCM6362 and BCM63268.
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In these SoCs it's possible to control LEDs both as GPIOs or by hardware.
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However, on some devices there are Serial LEDs (LEDs connected to a 74x164
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controller), which can either be controlled by software (exporting the 74x164
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as spi-gpio. See
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Documentation/devicetree/bindings/gpio/fairchild,74hc595.yaml), or by hardware
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using this driver.
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Some of these Serial LEDs are hardware controlled (e.g. ethernet LEDs) and
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exporting the 74x164 as spi-gpio prevents those LEDs to be hardware
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controlled, so the only chance to keep them working is by using this driver.
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BCM6328 LED controller has a HWDIS register, which controls whether a LED
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should be controlled by a hardware signal instead of the MODE register value,
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with 0 meaning hardware control enabled and 1 hardware control disabled. This
|
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is usually 1:1 for hardware to LED signals, but through the activity/link
|
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registers you have some limited control over rerouting the LEDs (as
|
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explained later in brcm,link-signal-sources). Even if a LED is hardware
|
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controlled you are still able to make it blink or light it up if it isn't,
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but you can't turn it off if the hardware decides to light it up. For this
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reason, hardware controlled LEDs aren't registered as LED class devices.
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Each LED is represented as a sub-node of the brcm,bcm6328-leds device.
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properties:
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compatible:
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const: brcm,bcm6328-leds
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reg:
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maxItems: 1
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brcm,serial-leds:
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type: boolean
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description: Enables Serial LEDs.
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brcm,serial-mux:
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type: boolean
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description: Enables Serial LEDs multiplexing.
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brcm,serial-clk-low:
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type: boolean
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description: Makes clock signal active low.
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brcm,serial-dat-low:
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type: boolean
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description: Makes data signal active low.
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brcm,serial-shift-inv:
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type: boolean
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description: Inverts Serial LEDs shift direction.
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"#address-cells":
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const: 1
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"#size-cells":
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const: 0
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patternProperties:
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"@[a-f0-9]+$":
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type: object
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$ref: common.yaml#
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properties:
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reg:
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items:
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- maximum: 23
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description: LED pin number (only LEDs 0 to 23 are valid).
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active-low:
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type: boolean
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description: Makes LED active low.
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brcm,hardware-controlled:
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type: boolean
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description: Makes this LED hardware controlled.
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brcm,link-signal-sources:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 1
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maxItems: 4
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description: >
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An array of hardware link signal sources. Up to four link hardware
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signals can get muxed into these LEDs. Only valid for LEDs 0 to 7,
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where LED signals 0 to 3 may be muxed to LEDs 0 to 3, and signals 4 to
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7 may be muxed to LEDs 4 to 7. A signal can be muxed to more than one
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LED, and one LED can have more than one source signal.
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brcm,activity-signal-sources:
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$ref: /schemas/types.yaml#/definitions/uint32-array
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minItems: 1
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maxItems: 4
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description: >
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An array of hardware activity signal sources. Up to four activity
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hardware signals can get muxed into these LEDs. Only valid for LEDs 0
|
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to 7, where LED signals 0 to 3 may be muxed to LEDs 0 to 3, and
|
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signals 4 to 7 may be muxed to LEDs 4 to 7. A signal can be muxed to
|
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more than one LED, and one LED can have more than one source signal.
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required:
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- reg
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unevaluatedProperties: false
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required:
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- reg
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- "#address-cells"
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- "#size-cells"
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additionalProperties: false
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examples:
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- |
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/* BCM6328 with 4 EPHY LEDs */
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led-controller@10000800 {
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compatible = "brcm,bcm6328-leds";
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#address-cells = <1>;
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#size-cells = <0>;
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reg = <0x10000800 0x24>;
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alarm_red@2 {
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reg = <2>;
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active-low;
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label = "red:alarm";
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};
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inet_green@3 {
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reg = <3>;
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active-low;
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label = "green:inet";
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};
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power_green@4 {
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reg = <4>;
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active-low;
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label = "green:power";
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||||
default-state = "on";
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||||
};
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ephy0_spd@17 {
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reg = <17>;
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brcm,hardware-controlled;
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};
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||||
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ephy1_spd@18 {
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reg = <18>;
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brcm,hardware-controlled;
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};
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ephy2_spd@19 {
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reg = <19>;
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brcm,hardware-controlled;
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};
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ephy3_spd@20 {
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reg = <20>;
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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";
|
||||
};
|
||||
};
|
||||
Loading…
x
Reference in New Issue
Block a user