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Reboot: trigger warm reset when receive hw_warmreset cmd

Browse source 
The "hw_warmreset" reboot command, it indicates the kernel to trigger
warm reset for saving lastkmsg. After the system warm reboot, the AP
will save last kmsg logs and call a clean cold reboot with the
"post-hw_warmreset" command.

Change-Id: I3a25735a4e9ff0ab72c05d3ba2914d80477d30dc
Reviewed-on: https://gerrit.mot.com/1536789
SLTApproved: Slta Waiver
SME-Granted: SME Approvals Granted
Tested-by: Jira Key
Reviewed-by: Zhenxin Xi <xizx@motorola.com>
Submit-Approved: Jira Key
Reviewed-on: https://gerrit.mot.com/1778586
Reviewed-by: Huosheng Liao <liaohs@motorola.com>
This commit is contained in:
xizx 2020-04-17 20:33:15 +08:00 • committed by Xiaojun Ji
commit f97ae225f2
2 changed files with 13 additions and 0 deletions
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11
drivers/power/reset/msm-poweroff.c
View file

@ -505,6 +505,17 @@ static void msm_restart_prepare(const char *cmd)
RESET_EXTRA_POST_PANIC_REASON);
/* force cold reboot */
qpnp_pon_system_pwr_off(PON_POWER_OFF_HARD_RESET);
} else if (!strncmp(cmd, "hw_warmreset", 13)) {
qpnp_pon_set_restart_reason(
PON_RESTART_REASON_HW_WARMRESET);
qpnp_pon_system_pwr_off(PON_POWER_OFF_WARM_RESET);
pr_info("set system hw warmreset mode\n");
} else if (!strncmp(cmd, "post-hw_warmreset", 17)) {
/* set flag in PMIC to nofity BL post hw_warmreset reboot */
qpnp_pon_store_extra_reset_info(RESET_EXTRA_POST_REBOOT_MASK,
RESET_EXTRA_POST_HWWARM_RESET_REASON);
/* force cold reboot */
qpnp_pon_system_pwr_off(PON_POWER_OFF_HARD_RESET);
} else {
__raw_writel(0x77665501, restart_reason);
}

2
include/linux/input/qpnp-power-on.h
View file

@ -55,8 +55,10 @@ enum pon_restart_reason {
PON_RESTART_REASON_DMVERITY_CORRUPTED = 0x04,
PON_RESTART_REASON_DMVERITY_ENFORCE = 0x05,
PON_RESTART_REASON_KEYS_CLEAR = 0x06,
PON_RESTART_REASON_HW_WARMRESET = 0x18,
};
#define RESET_EXTRA_POST_HWWARM_RESET_REASON BIT(6)
#define RESET_EXTRA_POST_PANIC_REASON (BIT(4) | BIT(5))
#define RESET_EXTRA_POST_PMICWDT_REASON BIT(5)
#define RESET_EXTRA_POST_WDT_REASON BIT(4)