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85 lines
2.2 KiB
85 lines
2.2 KiB
6 years ago
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From ae200d1bf8417e24ae3445092d75fc10dd7319b7 Mon Sep 17 00:00:00 2001
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From: Phil Elwell <phil@raspberrypi.org>
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Date: Sat, 12 May 2018 21:35:43 +0100
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Subject: [PATCH 303/454] firmware/raspberrypi: Notify firmware of a reboot
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Register for reboot notifications, sending RPI_FIRMWARE_NOTIFY_REBOOT
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over the mailbox interface on reception.
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Signed-off-by: Phil Elwell <phil@raspberrypi.org>
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---
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drivers/firmware/raspberrypi.c | 40 +++++++++++++++++++++++++++++++++-
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1 file changed, 39 insertions(+), 1 deletion(-)
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--- a/drivers/firmware/raspberrypi.c
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+++ b/drivers/firmware/raspberrypi.c
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@@ -14,6 +14,7 @@
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#include <linux/module.h>
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#include <linux/of_platform.h>
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#include <linux/platform_device.h>
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+#include <linux/reboot.h>
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#include <linux/workqueue.h>
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#include <soc/bcm2835/raspberrypi-firmware.h>
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@@ -275,6 +276,26 @@ static int rpi_firmware_get_throttled(st
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return 0;
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}
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+static int rpi_firmware_notify_reboot(struct notifier_block *nb,
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+ unsigned long action,
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+ void *data)
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+{
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+ struct rpi_firmware *fw;
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+ struct platform_device *pdev = g_pdev;
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+
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+ if (!pdev)
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+ return 0;
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+
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+ fw = platform_get_drvdata(pdev);
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+ if (!fw)
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+ return 0;
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+
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+ (void)rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_REBOOT,
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+ 0, 0);
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+
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+ return 0;
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+}
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+
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static void get_throttled_poll(struct work_struct *work)
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{
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struct rpi_firmware *fw = container_of(work, struct rpi_firmware,
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@@ -416,15 +437,32 @@ static struct platform_driver rpi_firmwa
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.remove = rpi_firmware_remove,
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};
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+static struct notifier_block rpi_firmware_reboot_notifier = {
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+ .notifier_call = rpi_firmware_notify_reboot,
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+};
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+
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static int __init rpi_firmware_init(void)
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{
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- return platform_driver_register(&rpi_firmware_driver);
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+ int ret = register_reboot_notifier(&rpi_firmware_reboot_notifier);
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+ if (ret)
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+ goto out1;
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+ ret = platform_driver_register(&rpi_firmware_driver);
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+ if (ret)
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+ goto out2;
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+
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+ return 0;
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+
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+out2:
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+ unregister_reboot_notifier(&rpi_firmware_reboot_notifier);
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+out1:
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+ return ret;
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}
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subsys_initcall(rpi_firmware_init);
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static void __init rpi_firmware_exit(void)
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{
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platform_driver_unregister(&rpi_firmware_driver);
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+ unregister_reboot_notifier(&rpi_firmware_reboot_notifier);
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}
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module_exit(rpi_firmware_exit);
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