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

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QCTECMDR Service 2024-09-17 03:35:03 -07:00 • committed by Gerrit - the friendly Code Review server
commit e4c2f15ba5
1 changed files with 37 additions and 4 deletions
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43
drivers/power/reset/qcom-dload-mode.c
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@ -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);