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