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- From b77abe2ef3f89489f9ca47653170bf31c3ea0bab Mon Sep 17 00:00:00 2001
- From: Phil Elwell <phil@raspberrypi.org>
- Date: Wed, 23 Mar 2016 15:57:14 +0000
- Subject: [PATCH] BCM270X_DT: Add pi3-act-led overlay
- Signed-off-by: Phil Elwell <phil@raspberrypi.org>
- ---
- arch/arm/boot/dts/overlays/Makefile | 1 +
- arch/arm/boot/dts/overlays/README | 19 +++++++++++++++
- arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts | 27 ++++++++++++++++++++++
- 3 files changed, 47 insertions(+)
- create mode 100644 arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts
- --- a/arch/arm/boot/dts/overlays/Makefile
- +++ b/arch/arm/boot/dts/overlays/Makefile
- @@ -39,6 +39,7 @@ dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can0.
- dtbo-$(RPI_DT_OVERLAYS) += mcp2515-can1.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += mmc.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += mz61581.dtbo
- +dtbo-$(RPI_DT_OVERLAYS) += pi3-act-led.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += pi3-disable-bt.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += pi3-miniuart-bt.dtbo
- dtbo-$(RPI_DT_OVERLAYS) += piscreen.dtbo
- --- a/arch/arm/boot/dts/overlays/README
- +++ b/arch/arm/boot/dts/overlays/README
- @@ -136,12 +136,14 @@ Params:
-
- act_led_activelow Set to "on" to invert the sense of the LED
- (default "off")
- + N.B. For Pi3 see pi3-act-led overlay.
-
- act_led_gpio Set which GPIO to use for the activity LED
- (in case you want to connect it to an external
- device)
- (default "16" on a non-Plus board, "47" on a
- Plus or Pi 2)
- + N.B. For Pi3 see pi3-act-led overlay.
-
- pwr_led_trigger
- pwr_led_activelow
- @@ -499,6 +501,23 @@ Params: speed Display
- [ The pcf8563-rtc overlay has been deleted. See i2c-rtc. ]
-
-
- +Name: pi3-act-led
- +Info: Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
- + from the VPU. There is a special driver for this with a separate DT
- + node, which has the unfortunate consequence of breaking the
- + act_led_gpio and act_led_activelow dtparams.
- + This overlay changes the GPIO controller back to the standard one and
- + restores the dtparams.
- +Load: dtoverlay=pi3-act-led,<param>=<val>
- +Params: activelow Set to "on" to invert the sense of the LED
- + (default "off")
- +
- + gpio Set which GPIO to use for the activity LED
- + (in case you want to connect it to an external
- + device)
- + REQUIRED
- +
- +
- Name: pi3-disable-bt
- Info: Disable Pi3 Bluetooth and restore UART0/ttyAMA0 over GPIOs 14 & 15
- N.B. To disable the systemd service that initialises the modem so it
- --- /dev/null
- +++ b/arch/arm/boot/dts/overlays/pi3-act-led-overlay.dts
- @@ -0,0 +1,27 @@
- +/dts-v1/;
- +/plugin/;
- +
- +/* Pi3 uses a GPIO expander to drive the LEDs which can only be accessed
- + from the VPU. There is a special driver for this with a separate DT node,
- + which has the unfortunate consequence of breaking the act_led_gpio and
- + act_led_activelow dtparams.
- +
- + This overlay changes the GPIO controller back to the standard one and
- + restores the dtparams.
- +*/
- +
- +/{
- + compatible = "brcm,bcm2708";
- +
- + fragment@0 {
- + target = <&act_led>;
- + frag0: __overlay__ {
- + gpios = <&gpio 0 0>;
- + };
- + };
- +
- + __overrides__ {
- + gpio = <&frag0>,"gpios:4";
- + activelow = <&frag0>,"gpios:8";
- + };
- +};
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