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62b7f5931c
bcm2708: boot tested on RPi B+ v1.2
bcm2709: boot tested on RPi 3B v1.2 and RPi 4B v1.1 4G
bcm2710: boot tested on RPi 3B v1.2
bcm2711: boot tested on RPi 4B v1.1 4G
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
(cherry-picked from commit f07e572f64)
152 lines
3.7 KiB
Diff
152 lines
3.7 KiB
Diff
From d27d1447e49bc6ffa92f787f7bc5c2eea29ba7d2 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 30 Sep 2020 12:08:08 +0100
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Subject: [PATCH] overlays: Add fsm-demo overlay
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fsm-demo demonstrates the usage of the gpio-fsm driver. It is
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designed to be used with a set of "traffic light" LEDs on GPIOs
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7, 8 and 25.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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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 | 8 ++
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.../boot/dts/overlays/fsm-demo-overlay.dts | 104 ++++++++++++++++++
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3 files changed, 113 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/fsm-demo-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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@@ -44,6 +44,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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enc28j60-spi2.dtbo \
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exc3000.dtbo \
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fe-pi-audio.dtbo \
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+ fsm-demo.dtbo \
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goodix.dtbo \
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googlevoicehat-soundcard.dtbo \
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gpio-fan.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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@@ -767,6 +767,14 @@ Load: dtoverlay=fe-pi-audio
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Params: <None>
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+Name: fsm-demo
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+Info: A demonstration of the gpio-fsm driver. The GPIOs are chosen to work
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+ nicely with a "traffic-light" display of red, amber and green LEDs on
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+ GPIOs 7, 8 and 25 respectively.
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+Load: dtoverlay=fsm-demo,<param>=<val>
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+Params: fsm_debug Enable debug logging (default off)
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+
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+
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Name: goodix
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Info: Enables I2C connected Goodix gt9271 multiple touch controller using
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GPIOs 4 and 17 (pins 7 and 11 on GPIO header) for interrupt and reset.
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/fsm-demo-overlay.dts
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@@ -0,0 +1,104 @@
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+// Demo overlay for the gpio-fsm driver
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+/dts-v1/;
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+/plugin/;
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+
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+#include <dt-bindings/gpio/gpio-fsm.h>
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+
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+#define BUTTON1 GF_IP(0)
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+#define BUTTON2 GF_SW(0)
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+#define RED GF_OP(0) // GPIO7
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+#define AMBER GF_OP(1) // GPIO8
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+#define GREEN GF_OP(2) // GPIO25
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+
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+/{
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+ compatible = "brcm,bcm2835";
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+
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+ fragment@0 {
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+ target-path = "/";
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+ __overlay__ {
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+ fsm_demo: fsm-demo {
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+ compatible = "rpi,gpio-fsm";
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+
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+ debug = <0>;
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+ gpio-controller;
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+ #gpio-cells = <2>;
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+ num-soft-gpios = <1>;
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+ gpio-line-names = "button2";
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+ input-gpios = <&gpio 6 1>; // BUTTON1 (active-low)
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+ output-gpios = <&gpio 7 0>, // RED
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+ <&gpio 8 0>, // AMBER
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+ <&gpio 25 0>; // GREEN
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+ shutdown-timeout-ms = <2000>;
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+
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+ start {
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+ start_state;
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+ set = <RED 1>, <AMBER 0>, <GREEN 0>;
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+ start2 = <GF_DELAY 250>;
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+ };
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+
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+ start2 {
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+ set = <RED 0>, <AMBER 1>;
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+ go = <GF_DELAY 250>;
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+ };
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+
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+ go {
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+ set = <RED 0>, <AMBER 0>, <GREEN 1>;
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+ ready_wait = <BUTTON1 0>;
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+ shutdown1 = <GF_SHUTDOWN 0>;
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+ };
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+
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+ ready_wait {
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+ // Clear the soft GPIO
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+ set = <BUTTON2 0>;
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+ ready = <GF_DELAY 1000>;
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+ shutdown1 = <GF_SHUTDOWN 0>;
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+ };
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+
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+ ready {
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+ stopping = <BUTTON1 1>, <BUTTON2 1>;
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+ shutdown1 = <GF_SHUTDOWN 0>;
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+ };
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+
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+ stopping {
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+ set = <GREEN 0>, <AMBER 1>;
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+ stopped = <GF_DELAY 1000>;
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+ };
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+
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+ stopped {
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+ set = <AMBER 0>, <RED 1>;
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+ get_set = <GF_DELAY 3000>;
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+ shutdown1 = <GF_SHUTDOWN 0>;
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+ };
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+
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+ get_set {
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+ set = <AMBER 1>;
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+ go = <GF_DELAY 1000>;
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+ };
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+
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+ shutdown1 {
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+ set = <RED 0>, <AMBER 0>, <GREEN 1>;
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+ shutdown2 = <GF_SHUTDOWN 250>;
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+ };
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+
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+ shutdown2 {
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+ set = <AMBER 1>, <GREEN 0>;
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+ shutdown3 = <GF_SHUTDOWN 250>;
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+ };
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+
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+ shutdown3 {
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+ set = <RED 1>, <AMBER 0>;
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+ shutdown4 = <GF_SHUTDOWN 250>;
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+ };
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+
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+ shutdown4 {
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+ shutdown_state;
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+ set = <RED 0>;
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+ };
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+ };
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+ };
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+ };
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+
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+ __overrides__ {
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+ fsm_debug = <&fsm_demo>,"debug:0";
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+ };
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+};
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