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https://github.com/openwrt/openwrt.git
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94 lines
2.9 KiB
Diff
94 lines
2.9 KiB
Diff
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From 97fb20dfd682cf2748d1286322455cb8bf8b034d Mon Sep 17 00:00:00 2001
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From: Clarke X <1014930533@qq.com>
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Date: Sat, 8 Apr 2023 09:56:13 +0800
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Subject: [PATCH] overlays: Add gpio-charger support
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Add gpio-charger overlay for charger via gpio.
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Signed-off-by: Clarke X <1014930533@qq.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 | 14 +++++++
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.../dts/overlays/gpio-charger-overlay.dts | 42 +++++++++++++++++++
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3 files changed, 57 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/gpio-charger-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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@@ -68,6 +68,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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ghost-amp.dtbo \
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goodix.dtbo \
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googlevoicehat-soundcard.dtbo \
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+ gpio-charger.dtbo \
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gpio-fan.dtbo \
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gpio-hog.dtbo \
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gpio-ir.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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@@ -1248,6 +1248,20 @@ Load: dtoverlay=googlevoicehat-soundca
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Params: <None>
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+Name: gpio-charger
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+Info: This is a generic overlay for detecting charger with GPIO.
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+Load: dtoverlay=gpio-charger,<param>=<val>
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+Params: gpio GPIO pin to trigger on (default 4)
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+ active_low When this is 1 (active low), a falling
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+ edge generates a charging event and a
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+ rising edge generates a discharging event.
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+ When this is 0 (active high), this is
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+ reversed. The default is 0 (active high)
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+ gpio_pull Desired pull-up/down state (off, down, up)
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+ Default is "down".
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+ type Set a charger type for the pin. (Default: mains)
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+
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+
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Name: gpio-fan
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Info: Configure a GPIO pin to control a cooling fan.
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Load: dtoverlay=gpio-fan,<param>=<val>
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/gpio-charger-overlay.dts
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@@ -0,0 +1,42 @@
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+// Definitions for gpio-charger module
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+/dts-v1/;
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+/plugin/;
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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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+ // Configure the gpio pin controller
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+ target = <&gpio>;
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+ __overlay__ {
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+ pin_state: charger_pins@0 {
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+ brcm,pins = <4>; // gpio number
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+ brcm,function = <0>; // 0 = input, 1 = output
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+ brcm,pull = <1>; // 0 = none, 1 = pull down, 2 = pull up
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+ };
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+ };
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+ };
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+ fragment@1 {
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+ target-path = "/";
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+ __overlay__ {
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+ charger: charger@0 {
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+ compatible = "gpio-charger";
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+ pinctrl-0 = <&pin_state>;
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+ status = "okay";
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+ gpios = <&gpio 4 0>;
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+ charger-type = "mains";
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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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+ gpio = <&charger>,"reg:0",
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+ <&charger>,"gpios:4",
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+ <&pin_state>,"reg:0",
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+ <&pin_state>,"brcm,pins:0";
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+ type = <&charger>,"charger-type";
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+ gpio_pull = <&pin_state>,"brcm,pull:0";
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+ active_low = <&charger>,"gpios:8";
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+ };
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+
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+};
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