On 06/20/2016 08:38 AM, Andy Yan wrote: > This driver parses the reboot commands like "reboot bootloader" > and "reboot recovery" to get a boot mode described in the > device tree , then call the write interfae to store the boot > mode in some place like special register or sram, which can > be read by the bootloader after system reboot, then the bootloader > can take different action according to the mode stored. > > This is commonly used on Android based devices, in order to > reboot the device into fastboot or recovery mode. > > Reviewed-by: Matthias Brugger <matthias.bgg@xxxxxxxxx> > Reviewed-by: Moritz Fischer <moritz.fischer@xxxxxxxxx> > Tested-by: John Stultz <john.stultz@xxxxxxxxxx> > Acked-by: John Stultz <john.stultz@xxxxxxxxxx> > Signed-off-by: Andy Yan <andy.yan@xxxxxxxxxxxxxx> > > --- > > Changes in v9: > - select MFD_SYSCON when syscon-reboot-mode driver enabled > - refactoring error handling in reboot_mode_register > > Changes in v8: > - do some cleanup when driver ubind > > Changes in v7: > - address some suggestions from Krzysztof, make syscon-reboot-mode driver data self-contained. > > Changes in v6: None > Changes in v5: > - use two blank space under help in Kconfig > - use unsigned int instead of int for member magic in struct mode_info > > Changes in v4: > - make this driver depends on OF to avoid kbuild test error > > Changes in v3: > - scan multi properities > - add mask value for some platform which only use some bits of the register > to store boot mode magic value > > Changes in v2: > - move to dir drivers/power/reset/ > - make syscon-reboot-mode a generic driver > > Changes in v1: > - fix the embarrassed compile warning > - correct the maskrom magic number > - check for the normal reboot > > drivers/power/reset/Kconfig | 14 ++++ > drivers/power/reset/Makefile | 2 + > drivers/power/reset/reboot-mode.c | 128 +++++++++++++++++++++++++++++++ > drivers/power/reset/reboot-mode.h | 14 ++++ > drivers/power/reset/syscon-reboot-mode.c | 100 ++++++++++++++++++++++++ > 5 files changed, 258 insertions(+) > create mode 100644 drivers/power/reset/reboot-mode.c > create mode 100644 drivers/power/reset/reboot-mode.h > create mode 100644 drivers/power/reset/syscon-reboot-mode.c > > diff --git a/drivers/power/reset/Kconfig b/drivers/power/reset/Kconfig > index 9bb2622..4ceaf74 100644 > --- a/drivers/power/reset/Kconfig > +++ b/drivers/power/reset/Kconfig > @@ -183,5 +183,19 @@ config POWER_RESET_ZX > help > Reboot support for ZTE SoCs. > > +config REBOOT_MODE > + tristate > + > +config SYSCON_REBOOT_MODE > + bool "Generic SYSCON regmap reboot mode driver" Why not tristate? Beside that the patch looks good. Best regards, Krzysztof > + depends on OF > + select REBOOT_MODE > + select MFD_SYSCON > + help > + Say y here will enable reboot mode driver. This will > + get reboot mode arguments and store it in SYSCON mapped > + register, then the bootloader can read it to take different > + action according to the mode. > + -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
