brcm2708: organize kernel patches

[openwrt/staging/chunkeey.git] / target / linux / brcm2708 / patches-4.19 / 950-0127-firmware-raspberrypi-Notify-firmware-of-a-reboot.patch

diff --git a/target/linux/brcm2708/patches-4.19/950-0127-firmware-raspberrypi-Notify-firmware-of-a-reboot.patch b/target/linux/brcm2708/patches-4.19/950-0127-firmware-raspberrypi-Notify-firmware-of-a-reboot.patch
new file mode 100644 (file)
index 0000000..8e06168
--- /dev/null
+++ b/target/linux/brcm2708/patches-4.19/950-0127-firmware-raspberrypi-Notify-firmware-of-a-reboot.patch
@@ -0,0 +1,84 @@
+From 68aaa2f653c83f8fda6032153566b4f895dff524 Mon Sep 17 00:00:00 2001
+From: Phil Elwell <phil@raspberrypi.org>
+Date: Sat, 12 May 2018 21:35:43 +0100
+Subject: [PATCH] firmware/raspberrypi: Notify firmware of a reboot
+
+Register for reboot notifications, sending RPI_FIRMWARE_NOTIFY_REBOOT
+over the mailbox interface on reception.
+
+Signed-off-by: Phil Elwell <phil@raspberrypi.org>
+---
+ drivers/firmware/raspberrypi.c | 40 +++++++++++++++++++++++++++++++++-
+ 1 file changed, 39 insertions(+), 1 deletion(-)
+
+--- a/drivers/firmware/raspberrypi.c
++++ b/drivers/firmware/raspberrypi.c
+@@ -15,6 +15,7 @@
+ #include <linux/of_platform.h>
+ #include <linux/platform_device.h>
+ #include <linux/slab.h>
++#include <linux/reboot.h>
+ #include <linux/slab.h>
+ #include <soc/bcm2835/raspberrypi-firmware.h>
+ 
+@@ -175,6 +176,26 @@ int rpi_firmware_property(struct rpi_fir
+ }
+ EXPORT_SYMBOL_GPL(rpi_firmware_property);
+ 
++static int rpi_firmware_notify_reboot(struct notifier_block *nb,
++                                    unsigned long action,
++                                    void *data)
++{
++      struct rpi_firmware *fw;
++      struct platform_device *pdev = g_pdev;
++
++      if (!pdev)
++              return 0;
++
++      fw = platform_get_drvdata(pdev);
++      if (!fw)
++              return 0;
++
++      (void)rpi_firmware_property(fw, RPI_FIRMWARE_NOTIFY_REBOOT,
++                                  0, 0);
++
++      return 0;
++}
++
+ static void
+ rpi_firmware_print_firmware_revision(struct rpi_firmware *fw)
+ {
+@@ -285,15 +306,32 @@ static struct platform_driver rpi_firmwa
+       .remove         = rpi_firmware_remove,
+ };
+ 
++static struct notifier_block rpi_firmware_reboot_notifier = {
++      .notifier_call = rpi_firmware_notify_reboot,
++};
++
+ static int __init rpi_firmware_init(void)
+ {
+-      return platform_driver_register(&rpi_firmware_driver);
++      int ret = register_reboot_notifier(&rpi_firmware_reboot_notifier);
++      if (ret)
++              goto out1;
++      ret = platform_driver_register(&rpi_firmware_driver);
++      if (ret)
++              goto out2;
++
++      return 0;
++
++out2:
++      unregister_reboot_notifier(&rpi_firmware_reboot_notifier);
++out1:
++      return ret;
+ }
+ subsys_initcall(rpi_firmware_init);
+ 
+ static void __init rpi_firmware_exit(void)
+ {
+       platform_driver_unregister(&rpi_firmware_driver);
++      unregister_reboot_notifier(&rpi_firmware_reboot_notifier);
+ }
+ module_exit(rpi_firmware_exit);
+