A-Team_Digital_Solutions/android_kernel_motorola_sm6375
Watch
2
0
Fork
You've already forked android_kernel_motorola_sm6375
 0
mirror of https://github.com/BobTheBlinker/android_kernel_motorola_sm6375.git synced 2026-10-07 12:25:00 -04:00
Code Issues Projects Releases Packages Wiki Activity

firmware: qcom_scm: handle echo b > /proc/sysrq-trigger

Browse source 
Introduce restart handler to handle "echo b > /proc/sysrq-trigger".
One special thing with 'b' kind of reboot is, it does not call reboot
notifiers and call restart handler right a way and that does not seems
to work for blair SoC and it goes to dump mode.

Keep this restart handler priority to 201 greater than 200 which is the
priority for msm-poweroff to make reboot work cleaner.

Change-Id: I42f8c0fde29af402096d760c37ec2d8b3a85439a
Signed-off-by: Mukesh Ojha <quic_mojha@quicinc.com>
Signed-off-by: Sayan Dey <quic_sayand@quicinc.com>
This commit is contained in:
Mukesh Ojha 2024-03-29 14:37:42 +05:30 • committed by Sayan Dey
commit b2af2b5f9f
1 changed files with 37 additions and 4 deletions
Download patch file Download diff file Expand all files Collapse all files

43
drivers/power/reset/qcom-dload-mode.c
View file

@ -1,5 +1,6 @@
// SPDX-License-Identifier: GPL-2.0-only
/* Copyright (c) 2020 The Linux Foundation. All rights reserved.
* Copyright (c) 2024 Qualcomm Innovation Center, Inc. All rights reserved.
*/
#include <linux/delay.h>
@ -24,10 +25,12 @@ enum qcom_download_dest {
struct qcom_dload {
struct notifier_block panic_nb;
struct notifier_block reboot_nb;
struct notifier_block restart_nb;
struct kobject kobj;
bool in_panic;
bool in_reboot;
void __iomem *dload_dest_addr;
};
@ -280,16 +283,40 @@ static int qcom_dload_panic(struct notifier_block *this, unsigned long event,
static int qcom_dload_restart(struct notifier_block *this, unsigned long event,
void *ptr)
{
char *cmd = ptr;
if (cmd && !strcmp(cmd, "edl")) {
set_download_mode(QCOM_DOWNLOAD_EDL);
reboot_mode = REBOOT_WARM;
struct qcom_dload *poweroff = container_of(this, struct qcom_dload,
restart_nb);
if (!poweroff->in_panic && !poweroff->in_reboot) {
qcom_scm_disable_sdi();
set_download_mode(QCOM_DOWNLOAD_NODUMP);
}
return NOTIFY_OK;
}
static int qcom_dload_reboot(struct notifier_block *this, unsigned long event,
void *ptr)
{
char *cmd = ptr;
struct qcom_dload *poweroff = container_of(this, struct qcom_dload,
reboot_nb);
poweroff->in_reboot = true;
set_download_mode(QCOM_DOWNLOAD_NODUMP);
if (cmd) {
if (!strcmp(cmd, "edl"))
set_download_mode(QCOM_DOWNLOAD_EDL);
else if (!strcmp(cmd, "qcom_dload"))
msm_enable_dump_mode(true);
}
if (current_download_mode != QCOM_DOWNLOAD_NODUMP)
reboot_mode = REBOOT_WARM;
return NOTIFY_OK;
}
static void __iomem *map_prop_mem(const char *propname)
{
struct device_node *np = of_find_compatible_node(NULL, NULL, propname);
@ -394,13 +421,17 @@ static int qcom_dload_probe(struct platform_device *pdev)
atomic_notifier_chain_register(&panic_notifier_list,
&poweroff->panic_nb);
poweroff->reboot_nb.notifier_call = qcom_dload_reboot;
poweroff->reboot_nb.priority = 255;
register_reboot_notifier(&poweroff->reboot_nb);
poweroff->restart_nb.notifier_call = qcom_dload_restart;
/* Here, Restart handler priority should be higher than
* of restart handler present in scm driver so that
* reboot_mode set by this handler seen by SCM's one
* for EDL mode.
*/
poweroff->restart_nb.priority = 131;
poweroff->restart_nb.priority = 201;
register_restart_handler(&poweroff->restart_nb);
platform_set_drvdata(pdev, poweroff);
@ -414,7 +445,9 @@ static int qcom_dload_remove(struct platform_device *pdev)
atomic_notifier_chain_unregister(&panic_notifier_list,
&poweroff->panic_nb);
unregister_restart_handler(&poweroff->restart_nb);
unregister_reboot_notifier(&poweroff->reboot_nb);
if (poweroff->dload_dest_addr)
iounmap(poweroff->dload_dest_addr);