107 lines
2.7 KiB
Plaintext
107 lines
2.7 KiB
Plaintext
LEDs connected to Broadcom BCM6328 controller
|
|
|
|
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/gpio-74x164.txt), 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.
|
|
|
|
Required properties:
|
|
- compatible : should be "brcm,bcm6328-leds".
|
|
- #address-cells : must be 1.
|
|
- #size-cells : must be 0.
|
|
- reg : BCM6328 LED controller address and size.
|
|
|
|
Optional properties:
|
|
- brcm,serial-leds : Boolean, enables Serial LEDs.
|
|
Default : false
|
|
- brcm,serial-mux : Boolean, enables Serial LEDs multiplexing.
|
|
Default : false
|
|
- brcm,serial-clk-low : Boolean, makes clock signal active low.
|
|
Default : false
|
|
- brcm,serial-dat-low : Boolean, makes data signal active low.
|
|
Default : false
|
|
- brcm,serial-shift-inv : Boolean, inverts Serial LEDs shift direction.
|
|
Default : false
|
|
|
|
Each LED is represented as a sub-node of the brcm,bcm6328-leds device.
|
|
|
|
LED sub-node required properties:
|
|
- reg : LED pin number (only LEDs 0 to 23 are valid).
|
|
|
|
LED sub-node optional properties:
|
|
- label : see Documentation/devicetree/bindings/leds/common.txt
|
|
- active-low : Boolean, makes LED active low.
|
|
Default : false
|
|
|
|
Examples:
|
|
Scenario 1 : BCM6328 with 4 GPIO LEDs
|
|
leds0: 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";
|
|
};
|
|
};
|
|
|
|
Scenario 2 : BCM63268 with Serial LEDs
|
|
leds0: 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;
|
|
|
|
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";
|
|
};
|
|
power_green@20 {
|
|
reg = <20>;
|
|
active-low;
|
|
label = "green:power";
|
|
};
|
|
};
|