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2e715fb4fc
Add support for BCM2712 (Raspberry Pi 5).
3bb5880ab3
Patches were generated from the diff between linux kernel branch linux-6.1.y
and rpi-6.1.y from raspberry pi kernel source:
- git format-patch linux-6.1.y...rpi-6.1.y
Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2710/RPi3B, bcm2711/RPi4B
Signed-off-by: Marty Jones <mj8263788@gmail.com>
[Remove applied and reverted patches, squash patches and config commits]
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
198 lines
6.0 KiB
Diff
198 lines
6.0 KiB
Diff
From 7c0d40384b0648030d5202114d90239b8db7d4e0 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.com>
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Date: Wed, 2 Aug 2023 11:30:48 +0100
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Subject: [PATCH] Input: Add raspberrypi-button firmware driver
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Raspberry Pi 5s have a power/suspend button that is only accessible to
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the firmware. Add a driver to read it and generate key events.
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Signed-off-by: Phil Elwell <phil@raspberrypi.com>
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---
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drivers/input/misc/Kconfig | 10 ++
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drivers/input/misc/Makefile | 1 +
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drivers/input/misc/raspberrypi-button.c | 138 +++++++++++++++++++++
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include/soc/bcm2835/raspberrypi-firmware.h | 1 +
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4 files changed, 150 insertions(+)
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create mode 100644 drivers/input/misc/raspberrypi-button.c
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--- a/drivers/input/misc/Kconfig
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+++ b/drivers/input/misc/Kconfig
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@@ -918,6 +918,16 @@ config INPUT_RT5120_PWRKEY
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To compile this driver as a module, choose M here. the module will
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be called rt5120-pwrkey.
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+config INPUT_RASPBERRYPI_BUTTON
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+ tristate "Raspberry Pi button support"
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+ depends on RASPBERRYPI_FIRMWARE || (COMPILE_TEST && !RASPBERRYPI_FIRMWARE)
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+ help
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+ This enables support for firmware-controlled buttons on Raspberry
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+ Pi devices.
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+
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+ To compile this driver as a module, choose M here. the module will
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+ be called raspberrypi-button.
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+
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config INPUT_STPMIC1_ONKEY
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tristate "STPMIC1 PMIC Onkey support"
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depends on MFD_STPMIC1
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--- a/drivers/input/misc/Makefile
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+++ b/drivers/input/misc/Makefile
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@@ -70,6 +70,7 @@ obj-$(CONFIG_INPUT_RAVE_SP_PWRBUTTON) +=
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obj-$(CONFIG_INPUT_RB532_BUTTON) += rb532_button.o
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obj-$(CONFIG_INPUT_REGULATOR_HAPTIC) += regulator-haptic.o
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obj-$(CONFIG_INPUT_RETU_PWRBUTTON) += retu-pwrbutton.o
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+obj-$(CONFIG_INPUT_RASPBERRYPI_BUTTON) += raspberrypi-button.o
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obj-$(CONFIG_INPUT_RT5120_PWRKEY) += rt5120-pwrkey.o
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obj-$(CONFIG_INPUT_AXP20X_PEK) += axp20x-pek.o
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obj-$(CONFIG_INPUT_GPIO_ROTARY_ENCODER) += rotary_encoder.o
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--- /dev/null
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+++ b/drivers/input/misc/raspberrypi-button.c
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@@ -0,0 +1,138 @@
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+// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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+/*
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+ * Driver for Raspberry Pi power button
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+ *
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+ * Copyright (C) 2023 Raspberry Pi Ltd.
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+ *
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+ * This driver is based on drivers/hwmon/raspberrypi-hwmon.c and
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+ * input/misc/pm8941-pwrkey.c/ - see original files for copyright information
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+ */
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+
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+#include <linux/delay.h>
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+#include <linux/devm-helpers.h>
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+#include <dt-bindings/input/raspberrypi-button.h>
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+#include <linux/errno.h>
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+#include <linux/input.h>
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+#include <linux/kernel.h>
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+#include <linux/ktime.h>
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+#include <linux/module.h>
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+#include <linux/of.h>
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+#include <linux/of_address.h>
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+#include <linux/of_device.h>
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+#include <linux/platform_device.h>
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+#include <linux/workqueue.h>
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+#include <soc/bcm2835/raspberrypi-firmware.h>
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+
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+struct rpi_button {
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+ struct device *dev;
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+ struct rpi_firmware *fw;
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+ struct input_dev *input;
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+ struct delayed_work poll_work;
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+ unsigned long poll_rate;
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+ const char *name;
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+ u32 id;
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+ u32 code;
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+};
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+
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+static void button_poll(struct work_struct *work)
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+{
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+ struct rpi_button *button;
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+ u32 value;
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+ int err;
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+
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+ button = container_of(work, struct rpi_button,
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+ poll_work.work);
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+
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+ value = BIT(button->id);
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+ err = rpi_firmware_property(button->fw, RPI_FIRMWARE_GET_BUTTONS_PRESSED,
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+ &value, sizeof(value));
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+ if (err) {
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+ dev_err_once(button->dev, "GET_BUTTON_PRESSED not implemented?\n");
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+ return;
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+ }
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+
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+ if (value & BIT(button->id)) {
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+ input_event(button->input, EV_KEY, button->code, 1);
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+ input_sync(button->input);
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+ input_event(button->input, EV_KEY, button->code, 0);
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+ input_sync(button->input);
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+ }
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+
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+ schedule_delayed_work(&button->poll_work, button->poll_rate);
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+}
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+
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+static int rpi_button_probe(struct platform_device *pdev)
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+{
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+ struct device *dev = &pdev->dev;
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+ struct rpi_button *button;
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+ int err;
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+
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+ button = devm_kzalloc(dev, sizeof(*button), GFP_KERNEL);
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+ if (!button)
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+ return -ENOMEM;
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+
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+ button->dev = dev;
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+
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+ /* Get the firmware pointer from our parent */
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+ button->fw = dev_get_drvdata(dev->parent);
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+
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+ if (device_property_read_u32(dev, "id", &button->id))
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+ button->id = RASPBERRYPI_BUTTON_POWER;
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+
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+ if (device_property_read_string(dev, "label", &button->name))
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+ button->name = "raspberrypi-button";
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+
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+ if (device_property_read_u32(dev, "linux,code", &button->code)) {
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+ dev_err(&pdev->dev, "no linux,code property\n");
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+ return -EINVAL;
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+ }
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+
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+ button->input = devm_input_allocate_device(dev);
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+ if (!button->input) {
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+ dev_dbg(&pdev->dev, "unable to allocate input device\n");
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+ return -ENOMEM;
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+ }
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+
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+ input_set_capability(button->input, EV_KEY, button->code);
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+
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+ button->input->name = button->name;
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+ button->input->phys = "raspberrypi-button/input0";
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+ button->input->dev.parent = dev;
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+ button->poll_rate = HZ;
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+
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+ err = input_register_device(button->input);
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+ if (err) {
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+ dev_err(&pdev->dev, "failed to register input device: %d\n",
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+ err);
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+ return err;
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+ }
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+
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+ err = devm_delayed_work_autocancel(dev, &button->poll_work,
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+ button_poll);
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+ if (err)
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+ return err;
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+
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+ platform_set_drvdata(pdev, button);
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+ schedule_delayed_work(&button->poll_work, button->poll_rate);
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+
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+ return 0;
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+}
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+
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+static const struct of_device_id rpi_button_match[] = {
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+ { .compatible = "raspberrypi,firmware-button", },
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+ { }
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+};
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+MODULE_DEVICE_TABLE(of, rpi_button_match);
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+
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+static struct platform_driver rpi_button_driver = {
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+ .probe = rpi_button_probe,
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+ .driver = {
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+ .name = "raspberrypi-button",
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+ .of_match_table = of_match_ptr(rpi_button_match),
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+ },
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+};
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+module_platform_driver(rpi_button_driver);
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+
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+MODULE_AUTHOR("Phil Elwell <phil@raspberrypi.com>");
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+MODULE_DESCRIPTION("Raspberry Pi button driver");
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+MODULE_LICENSE("Dual BSD/GPL");
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--- a/include/soc/bcm2835/raspberrypi-firmware.h
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+++ b/include/soc/bcm2835/raspberrypi-firmware.h
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@@ -98,6 +98,7 @@ enum rpi_firmware_property_tag {
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RPI_FIRMWARE_GET_REBOOT_FLAGS = 0x00030064,
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RPI_FIRMWARE_SET_REBOOT_FLAGS = 0x00038064,
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RPI_FIRMWARE_NOTIFY_DISPLAY_DONE = 0x00030066,
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+ RPI_FIRMWARE_GET_BUTTONS_PRESSED = 0x00030088,
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/* Dispmanx TAGS */
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RPI_FIRMWARE_FRAMEBUFFER_ALLOCATE = 0x00040001,
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