[PATCH 00/11] PM8916 PON support

[Sam Day via B4 Relay]

This series introduces sysreset + reboot-mode drivers for PM8916 PON.

Additionally, fastboot gains support for driving DM reboot-mode, so that
`fastboot reboot bootloader` works as you'd expect.

This series should be considered supplementary and slightly alternative
to Aswin's NVMEM-based approach currently on the list. I cherry-picked
Aswin's commit for adding reboot-mode detection to mach-snapdragon
board code.

I think a native PON driver for the older (non-SDAM) PMICs should exist,
rather than trying to bridge the gap with synthetic NVMEM DT nodes. The
main issue is that we'd need to define these overrides for every
device/SoC-family since those nodes don't (and won't?) exist in the
mainline kernel.

The other main differences between this series and Aswin's are:

 * A sysreset driver is implemented, in addition to reboot-mode. This is
   what makes the poweroff command work on MSM8916 and other older
   platforms lacking a (sane, or any at all) PSCI implementation.
 * The DM reboot-mode-driven fastboot_set_reboot_flag implementation,
   which is what makes `fastboot reboot bootloader` work.

I think the PON infra introduced in this series can be generalized out
beyond PM8916, but I decided to stop here and leave further
generalization up to a follow-up series (or follow-up version, depending
on feedback!)

Link: https://lore.kernel.org/u-boot/20260521180549.282377-1-aswin.murugan@oss.qualcomm.com/
Signed-off-by: Sam Day <me at samcday.com>
---
Aswin Murugan (1):
      mach-snapdragon: Integrate reboot-mode handling

Sam Day (10):
      button: qcom-pmic: introduce exported setup method
      drivers: misc: pm8916_pon: add glue driver
      qcom_defconfig: enable PM8916_PON
      drivers: misc: pm8916_pon: support setting reboot type
      sysreset: qcom-pshold: PM8916 PON reset type support
      qcom_defconfig: enable poweroff command
      reboot-mode: pm8916-pon: add new driver
      reboot-mode: reboot method activation support
      fastboot: DM_REBOOT_MODE reset support
      qcom_defconfig: enable reboot modes

 arch/arm/mach-snapdragon/board.c             |  56 +++++++--
 configs/qcom_defconfig                       |   5 +
 drivers/button/button-qcom-pmic.c            |   7 +-
 drivers/fastboot/Kconfig                     |   7 ++
 drivers/fastboot/Makefile                    |   1 +
 drivers/fastboot/fb_reboot_mode.c            |  51 ++++++++
 drivers/misc/Kconfig                         |   7 ++
 drivers/misc/Makefile                        |   1 +
 drivers/misc/pm8916_pon.c                    | 167 +++++++++++++++++++++++++++
 drivers/reboot-mode/Makefile                 |   1 +
 drivers/reboot-mode/reboot-mode-pm8916-pon.c |  88 ++++++++++++++
 drivers/reboot-mode/reboot-mode-uclass.c     |  18 +++
 drivers/sysreset/sysreset_qcom-pshold.c      |   9 ++
 include/button/qcom-pmic.h                   |  17 +++
 include/pm8916_pon.h                         |  18 +++
 include/reboot-mode/reboot-mode.h            |  12 ++
 16 files changed, 450 insertions(+), 15 deletions(-)
---
base-commit: 75daa277941702bf58c88d65c0cb6ed962899d9e
change-id: 20260603-pm8916-pon-738d766b8006

Best regards,
-- 
Sam Day <me at samcday.com>