Hi Shawn, On Mittwoch, 14. Juli 2021 11:58:49 CEST Shawn Guo wrote: > On some devices, e.g. Sony Xperia M4 Aqua, warm reset is used to reboot > device into bootloader and recovery mode. Instead of always doing hard > reset, add a check on reboot_mode for possible warm reset. > > Signed-off-by: Shawn Guo <shawn.guo@xxxxxxxxxx> Tested-by: Luca Weiss <luca@xxxxxxxxx> Rebooting into bootloader works on fairphone-fp2 with these commands now: $ echo warm > /sys/kernel/reboot/mode $ reboot-mode bootloader reboot-mode is this small utility: https://gitlab.com/postmarketOS/reboot-mode/-/blob/master/reboot-mode.c Regards Luca > --- > drivers/input/misc/pm8941-pwrkey.c | 6 +++++- > 1 file changed, 5 insertions(+), 1 deletion(-) > > diff --git a/drivers/input/misc/pm8941-pwrkey.c > b/drivers/input/misc/pm8941-pwrkey.c index cf8104454e74..9b14d6eb1918 > 100644 > --- a/drivers/input/misc/pm8941-pwrkey.c > +++ b/drivers/input/misc/pm8941-pwrkey.c > @@ -27,6 +27,7 @@ > #define PON_PS_HOLD_RST_CTL2 0x5b > #define PON_PS_HOLD_ENABLE BIT(7) > #define PON_PS_HOLD_TYPE_MASK 0x0f > +#define PON_PS_HOLD_TYPE_WARM_RESET 1 > #define PON_PS_HOLD_TYPE_SHUTDOWN 4 > #define PON_PS_HOLD_TYPE_HARD_RESET 7 > > @@ -93,7 +94,10 @@ static int pm8941_reboot_notify(struct notifier_block > *nb, break; > case SYS_RESTART: > default: > - reset_type = PON_PS_HOLD_TYPE_HARD_RESET; > + if (reboot_mode == REBOOT_WARM) > + reset_type = PON_PS_HOLD_TYPE_WARM_RESET; > + else > + reset_type = PON_PS_HOLD_TYPE_HARD_RESET; > break; > }
