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Commit 83e8e6e1 authored by Andreas Schneider's avatar Andreas Schneider
Browse files

power: reset: Allow device to preserve memory on restart 

Always perform a soft reset as this preserves memory contents, including
pstore and other persistent memory.
parent 89ba8dad

drivers/power/reset/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -103,6 +103,15 @@ config QCOM_DLOAD_MODE 
		make the kernel reboot on a kernel panic - that must be

		enabled via another mechanism.



config QCOM_PRESERVE_MEM

	bool "Always preserve memory on restart"

	depends on POWER_RESET_QCOM

	help

	  If crash to download mode is disabled and restart reason is null

	  the system will always perform a hard reset, which wipes out

	  persistent memory contents. Select this option to always perform

	  a soft reset that preserves memory contents.



config POWER_RESET_QNAP

	bool "QNAP power-off driver"

	depends on OF_GPIO && PLAT_ORION

drivers/power/reset/msm-poweroff.c

+4 −0
Original line number Diff line number Diff line
@@ -304,6 +304,10 @@ static void msm_restart_prepare(const char *cmd) 
	if (in_panic)

		need_warm_reset = true;



#ifdef CONFIG_QCOM_PRESERVE_MEM

	need_warm_reset = true;

#endif



	/* Hard reset the PMIC unless memory contents must be maintained. */

	if (need_warm_reset) {

		qpnp_pon_system_pwr_off(PON_POWER_OFF_WARM_RESET);