mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 06:57:57 +00:00
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>
238 lines
6.4 KiB
Diff
238 lines
6.4 KiB
Diff
From 222dedcdc09247126d39364a614ff2019789f52a Mon Sep 17 00:00:00 2001
|
|
From: Dom Cobley <popcornmix@gmail.com>
|
|
Date: Fri, 7 Jul 2023 20:00:45 +0100
|
|
Subject: [PATCH] rtc: rtc-rpi: Add simple RTC driver for Raspberry Pi
|
|
|
|
This supports setting and reading the real time clock
|
|
and supports wakeup alarms.
|
|
|
|
To support wake up alarms you want this bootloader config:
|
|
POWER_OFF_ON_HALT=1
|
|
WAKE_ON_GPIO=0
|
|
|
|
You can test with:
|
|
echo +600 | sudo tee /sys/class/rtc/rtc0/wakealarm
|
|
sudo halt
|
|
|
|
That will halt (in an almost no power state),
|
|
then wake and restart after 10 minutes.
|
|
|
|
Signed-off-by: Dom Cobley <popcornmix@gmail.com>
|
|
---
|
|
drivers/rtc/Kconfig | 11 +++
|
|
drivers/rtc/Makefile | 1 +
|
|
drivers/rtc/rtc-rpi.c | 177 ++++++++++++++++++++++++++++++++++++++++++
|
|
3 files changed, 189 insertions(+)
|
|
create mode 100644 drivers/rtc/rtc-rpi.c
|
|
|
|
--- a/drivers/rtc/Kconfig
|
|
+++ b/drivers/rtc/Kconfig
|
|
@@ -223,6 +223,17 @@ config RTC_DRV_AC100
|
|
This driver can also be built as a module. If so, the module
|
|
will be called rtc-ac100.
|
|
|
|
+config RTC_DRV_RPI
|
|
+ tristate "Raspberry Pi RTC"
|
|
+ depends on ARCH_BRCMSTB || COMPILE_TEST
|
|
+ default ARCH_BRCMSTB
|
|
+ help
|
|
+ If you say yes here you get support for the RTC found on
|
|
+ Raspberry Pi devices.
|
|
+
|
|
+ This driver can also be built as a module. If so, the module
|
|
+ will be called rtc-rpi.
|
|
+
|
|
config RTC_DRV_BRCMSTB
|
|
tristate "Broadcom STB wake-timer"
|
|
depends on ARCH_BRCMSTB || BMIPS_GENERIC || COMPILE_TEST
|
|
--- a/drivers/rtc/Makefile
|
|
+++ b/drivers/rtc/Makefile
|
|
@@ -140,6 +140,7 @@ obj-$(CONFIG_RTC_DRV_RC5T583) += rtc-rc5
|
|
obj-$(CONFIG_RTC_DRV_RC5T619) += rtc-rc5t619.o
|
|
obj-$(CONFIG_RTC_DRV_RK808) += rtc-rk808.o
|
|
obj-$(CONFIG_RTC_DRV_RP5C01) += rtc-rp5c01.o
|
|
+obj-$(CONFIG_RTC_DRV_RPI) += rtc-rpi.o
|
|
obj-$(CONFIG_RTC_DRV_RS5C313) += rtc-rs5c313.o
|
|
obj-$(CONFIG_RTC_DRV_RS5C348) += rtc-rs5c348.o
|
|
obj-$(CONFIG_RTC_DRV_RS5C372) += rtc-rs5c372.o
|
|
--- /dev/null
|
|
+++ b/drivers/rtc/rtc-rpi.c
|
|
@@ -0,0 +1,177 @@
|
|
+// SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause
|
|
+/**
|
|
+ * rtc-rpi.c
|
|
+ *
|
|
+ * RTC driver using firmware mailbox
|
|
+ * Supports battery backed RTC and wake alarms
|
|
+ *
|
|
+ * Based on rtc-meson-vrtc by Neil Armstrong
|
|
+ *
|
|
+ * Copyright (c) 2023, Raspberry Pi Ltd.
|
|
+ */
|
|
+
|
|
+#include <linux/module.h>
|
|
+#include <linux/platform_device.h>
|
|
+#include <linux/rtc.h>
|
|
+#include <linux/of.h>
|
|
+#include <soc/bcm2835/raspberrypi-firmware.h>
|
|
+
|
|
+struct rpi_rtc_data {
|
|
+ struct rtc_device *rtc;
|
|
+ struct rpi_firmware *fw;
|
|
+};
|
|
+
|
|
+#define RPI_FIRMWARE_GET_RTC_REG 0x00030087
|
|
+#define RPI_FIRMWARE_SET_RTC_REG 0x00038087
|
|
+enum {RTC_TIME, RTC_ALARM, RTC_ALARM_PENDING, RTC_ALARM_ENABLE};
|
|
+
|
|
+static int rpi_rtc_read_time(struct device *dev, struct rtc_time *tm)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc = dev_get_drvdata(dev);
|
|
+ u32 data[2] = {RTC_TIME};
|
|
+ int err;
|
|
+
|
|
+ err = rpi_firmware_property(vrtc->fw, RPI_FIRMWARE_GET_RTC_REG,
|
|
+ &data, sizeof(data));
|
|
+ rtc_time64_to_tm(data[1], tm);
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int rpi_rtc_set_time(struct device *dev, struct rtc_time *tm)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc = dev_get_drvdata(dev);
|
|
+ u32 data[2] = {RTC_TIME, rtc_tm_to_time64(tm)};
|
|
+
|
|
+ return rpi_firmware_property(vrtc->fw, RPI_FIRMWARE_SET_RTC_REG,
|
|
+ &data, sizeof(data));
|
|
+}
|
|
+
|
|
+static int rpi_rtc_alarm_irq_is_enabled(struct device *dev, unsigned char *enabled)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc = dev_get_drvdata(dev);
|
|
+ u32 data[2] = {RTC_ALARM_ENABLE};
|
|
+ s32 err = 0;
|
|
+
|
|
+ err = rpi_firmware_property(vrtc->fw, RPI_FIRMWARE_GET_RTC_REG,
|
|
+ &data, sizeof(data));
|
|
+ *enabled = data[1] & 0x1;
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int rpi_rtc_alarm_irq_enable(struct device *dev, unsigned int enabled)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc = dev_get_drvdata(dev);
|
|
+ u32 data[2] = {RTC_ALARM_ENABLE, enabled};
|
|
+
|
|
+ return rpi_firmware_property(vrtc->fw, RPI_FIRMWARE_SET_RTC_REG,
|
|
+ &data, sizeof(data));
|
|
+}
|
|
+
|
|
+static int rpi_rtc_alarm_clear_pending(struct device *dev)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc = dev_get_drvdata(dev);
|
|
+ u32 data[2] = {RTC_ALARM_PENDING, 1};
|
|
+
|
|
+ return rpi_firmware_property(vrtc->fw, RPI_FIRMWARE_SET_RTC_REG,
|
|
+ &data, sizeof(data));
|
|
+}
|
|
+
|
|
+static int rpi_rtc_read_alarm(struct device *dev, struct rtc_wkalrm *alarm)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc = dev_get_drvdata(dev);
|
|
+ u32 data[2] = {RTC_ALARM};
|
|
+ s32 err = 0;
|
|
+
|
|
+ err = rpi_rtc_alarm_irq_is_enabled(dev, &alarm->enabled);
|
|
+ if (!err)
|
|
+ err = rpi_firmware_property(vrtc->fw, RPI_FIRMWARE_GET_RTC_REG,
|
|
+ &data, sizeof(data));
|
|
+ rtc_time64_to_tm(data[1], &alarm->time);
|
|
+
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static int rpi_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alarm)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc = dev_get_drvdata(dev);
|
|
+ u32 data[2] = {RTC_ALARM, rtc_tm_to_time64(&alarm->time)};
|
|
+ int err;
|
|
+
|
|
+ err = rpi_firmware_property(vrtc->fw, RPI_FIRMWARE_SET_RTC_REG,
|
|
+ &data, sizeof(data));
|
|
+
|
|
+ if (err == 0)
|
|
+ err = rpi_rtc_alarm_irq_enable(dev, alarm->enabled);
|
|
+
|
|
+ return err;
|
|
+}
|
|
+
|
|
+static const struct rtc_class_ops rpi_rtc_ops = {
|
|
+ .read_time = rpi_rtc_read_time,
|
|
+ .set_time = rpi_rtc_set_time,
|
|
+ .read_alarm = rpi_rtc_read_alarm,
|
|
+ .set_alarm = rpi_rtc_set_alarm,
|
|
+ .alarm_irq_enable = rpi_rtc_alarm_irq_enable,
|
|
+};
|
|
+
|
|
+static int rpi_rtc_probe(struct platform_device *pdev)
|
|
+{
|
|
+ struct rpi_rtc_data *vrtc;
|
|
+ struct device *dev = &pdev->dev;
|
|
+ struct device_node *np = dev->of_node;
|
|
+ struct device_node *fw_node;
|
|
+ struct rpi_firmware *fw;
|
|
+ int ret;
|
|
+
|
|
+ fw_node = of_parse_phandle(np, "firmware", 0);
|
|
+ if (!fw_node) {
|
|
+ dev_err(dev, "Missing firmware node\n");
|
|
+ return -ENOENT;
|
|
+ }
|
|
+
|
|
+ fw = rpi_firmware_get(fw_node);
|
|
+ if (!fw)
|
|
+ return -EPROBE_DEFER;
|
|
+
|
|
+ vrtc = devm_kzalloc(&pdev->dev, sizeof(*vrtc), GFP_KERNEL);
|
|
+ if (!vrtc)
|
|
+ return -ENOMEM;
|
|
+
|
|
+ vrtc->fw = fw;
|
|
+
|
|
+ device_init_wakeup(&pdev->dev, 1);
|
|
+
|
|
+ platform_set_drvdata(pdev, vrtc);
|
|
+
|
|
+ vrtc->rtc = devm_rtc_allocate_device(&pdev->dev);
|
|
+ if (IS_ERR(vrtc->rtc))
|
|
+ return PTR_ERR(vrtc->rtc);
|
|
+
|
|
+ set_bit(RTC_FEATURE_ALARM_WAKEUP_ONLY, vrtc->rtc->features);
|
|
+ clear_bit(RTC_FEATURE_UPDATE_INTERRUPT, vrtc->rtc->features);
|
|
+
|
|
+ vrtc->rtc->ops = &rpi_rtc_ops;
|
|
+ ret = devm_rtc_register_device(vrtc->rtc);
|
|
+
|
|
+ rpi_rtc_alarm_clear_pending(dev);
|
|
+ return ret;
|
|
+}
|
|
+
|
|
+static const struct of_device_id rpi_rtc_dt_match[] = {
|
|
+ { .compatible = "raspberrypi,rpi-rtc"},
|
|
+ {},
|
|
+};
|
|
+MODULE_DEVICE_TABLE(of, rpi_rtc_dt_match);
|
|
+
|
|
+static struct platform_driver rpi_rtc_driver = {
|
|
+ .probe = rpi_rtc_probe,
|
|
+ .driver = {
|
|
+ .name = "rpi-rtc",
|
|
+ .of_match_table = rpi_rtc_dt_match,
|
|
+ },
|
|
+};
|
|
+
|
|
+module_platform_driver(rpi_rtc_driver);
|
|
+
|
|
+MODULE_DESCRIPTION("Raspberry Pi RTC driver");
|
|
+MODULE_LICENSE("GPL");
|