[PATCH 0/3] qcom: MSM8916 sysreset support

[Sam Day]

Most MSM8916 devices shipped without PSCI support in their TZ firmware.
Instead, they use PSHOLD. These patches enable both PSCI and PSHOLD
sysreset drivers in qcom_defconfig.

Caleb had already submitted ([1]) a patch to do the switch to PSCI
sysreset driver as part of the UEFI capsule update series, but it seems
that the sysreset patch didn't make it upstream.

It's worth noting that sysreset still won't work if booting with a control DT
from upstream, as the msm8916.dtsi there includes a /psci node.

As far as I'm aware, only the db410c ever received a firmware update with
any PSCI support, so I intend to send a patch to kernel to remove the
default /psci node for msm8916 devices, assuming I get the green light ([2]).

I've tested in a local tree that includes a u-boot specific tweak to remove
the /psci node, and confirmed that qcom_defconfig can reset both an
msm8916 device and an sdm845 one.

[1]: https://lore.kernel.org/all/20240527-b4-qcom-capsule-updates-v2-6-47583d7ad428@linaro.org/
[2]: https://github.com/msm8916-mainline/linux/issues/388

Signed-off-by: Sam Day <me at samcday.com>
---
Sam Day (3):
      mach-snapdragon: use PSCI sysreset driver
      sysreset: qcom-pshold: remove ARCH_IPQ40XX dependency
      qcom_defconfig: enable SYSRESET_QCOM_PSHOLD

 arch/arm/mach-snapdragon/board.c | 5 -----
 configs/qcom_defconfig           | 3 +++
 drivers/sysreset/Kconfig         | 1 -
 3 files changed, 3 insertions(+), 6 deletions(-)
---
base-commit: 8162f35a108441b8d7a44ac9266c1a64dbf79fd5
change-id: 20250121-msm8916-sysreset-580d9a65a759

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