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793f8ab62c
Add kernel patches for version 6.1. Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
133 lines
3.6 KiB
Diff
133 lines
3.6 KiB
Diff
From 6f5604a2d672ffb874f89f9ae276b565ae99dcc6 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 16 Nov 2022 14:54:08 +0000
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Subject: [PATCH] overlays: Add overlay pwm1
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pwm1 enables the second PWM interface found on BCM2711. It can only
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be mapped to GPIOs 40 & 41.
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See: https://forums.raspberrypi.com/viewtopic.php?t=342458
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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 | 18 +++++++
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arch/arm/boot/dts/overlays/overlay_map.dts | 4 ++
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arch/arm/boot/dts/overlays/pwm1-overlay.dts | 60 +++++++++++++++++++++
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4 files changed, 83 insertions(+)
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create mode 100644 arch/arm/boot/dts/overlays/pwm1-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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@@ -183,6 +183,7 @@ dtbo-$(CONFIG_ARCH_BCM2835) += \
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pwm.dtbo \
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pwm-2chan.dtbo \
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pwm-ir-tx.dtbo \
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+ pwm1.dtbo \
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qca7000.dtbo \
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qca7000-uart0.dtbo \
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ramoops.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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@@ -3216,6 +3216,24 @@ Params: gpio_pin Output G
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func Pin function (default 2 = Alt5)
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+Name: pwm1
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+Info: Configures one or two PWM channel on PWM1 (BCM2711 only)
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+ N.B.:
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+ 1) The onboard analogue audio output uses both PWM channels.
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+ 2) So be careful mixing audio and PWM.
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+ Note that even when only one pin is enabled, both channels are available
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+ from the PWM driver, so be careful to use the correct one.
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+Load: dtoverlay=pwm1,<param>=<val>
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+Params: clock PWM clock frequency (informational)
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+ pins_40 Enable channel 0 (PWM1_0) on GPIO 40
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+ pins_41 Enable channel 1 (PWM1_1) on GPIO 41
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+ pins_40_41 Enable channels 0 (PWM1_0) and 1 (PW1_1) on
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+ GPIOs 40 and 41 (default)
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+ pull_up Enable pull-ups on the PWM pins (default)
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+ pull_down Enable pull-downs on the PWM pins
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+ pull_off Disable pulls on the PWM pins
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+
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+
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Name: qca7000
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Info: in-tech's Evaluation Board for PLC Stamp micro
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This uses spi0 and a separate GPIO interrupt to connect the QCA7000.
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--- a/arch/arm/boot/dts/overlays/overlay_map.dts
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+++ b/arch/arm/boot/dts/overlays/overlay_map.dts
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@@ -77,6 +77,10 @@
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renamed = "miniuart-bt";
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};
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+ pwm1 {
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+ bcm2711;
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+ };
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+
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ramoops {
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bcm2835;
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bcm2711 = "ramoops-pi4";
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--- /dev/null
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+++ b/arch/arm/boot/dts/overlays/pwm1-overlay.dts
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@@ -0,0 +1,60 @@
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+/dts-v1/;
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+/plugin/;
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+
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+#include <dt-bindings/pinctrl/bcm2835.h>
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+
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+/ {
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+ compatible = "brcm,bcm2711";
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+
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+ fragment@0 {
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+ target = <&pins>;
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+ __overlay__ {
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+ brcm,pins = <40 41>;
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+ };
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+ };
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+
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+ fragment@1 {
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+ target = <&pins>;
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+ __dormant__ {
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+ brcm,pins = <40>;
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+ };
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+ };
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+
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+ fragment@2 {
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+ target = <&pins>;
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+ __dormant__ {
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+ brcm,pins = <41>;
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+ };
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+ };
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+
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+ fragment@3 {
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+ target = <&gpio>;
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+ __overlay__ {
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+ pins: pwm1_overlay_pins {
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+ brcm,pins = <40 41>;
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+ brcm,function = <BCM2835_FSEL_ALT0>;
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+ brcm,pull = <BCM2835_PUD_UP>;
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+ };
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+ };
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+ };
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+
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+ fragment@4 {
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+ target = <&pwm1>;
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+ pwm: __overlay__ {
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+ status = "okay";
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+ assigned-clock-rates = <100000000>;
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+ pinctrl-names = "default";
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+ pinctrl-0 = <&pins>;
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+ };
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+ };
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+
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+ __overrides__ {
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+ clock = <&pwm>, "assigned-clock-rates:0";
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+ pins_40_41 = <0>,"+0-1-2";
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+ pins_40 = <0>,"-0+1-2";
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+ pins_41 = <0>,"-0-1+2";
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+ pull_up = <&pins>, "brcm,pull:0=", <BCM2835_PUD_UP>;
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+ pull_down = <&pins>, "brcm,pull:0=", <BCM2835_PUD_DOWN>;
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+ pull_off = <&pins>, "brcm,pull:0=", <BCM2835_PUD_OFF>;
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+ };
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+};
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