[PATCH RESEND 00/16] MSM8960 / mach-snapdragon ARMv7 support

[Antony Kurniawan Soemardi]

On 6/1/2026 3:12 PM, Sam Day via B4 Relay wrote:
> ** Resending because I found new ways to dislike Proton Mail (it failed
> the series midway due to "spamming". Sigh.). **
> 
> This patch series introduces support for ARMv7 Qualcomm SoCs, starting
> with MSM8960/MSM8930/MSM8227.
> 
> An overview of the changes:
>   * serial_msm reintroduces the previous packed RX/TX software mode
>     operation, as this is compatible with all UARTDM versions (1.4 and
>     older). It's added alongside the newer single-char mode for 1.4.
>   * A timer driver is introduced for KPSS. I don't know if *all* ARMv7
>     qcom SoCs lack generic ARM CP15 debug timer support, but at least
>     MSM8960/MSM8930 do.
>   * mach-snapdragon board code is shuffled around a bit to build cleanly
>     on ARM64.
>   * prev_bl_data support is extended to ARM32 (which uses r2 for passing
>     FDT/ATAGS pointers, rather than r0)
>   * qcom_parse_memory is revised to support arm32 memory nodes (which are
>     1-cell rather than 2-cell).
>   * Basic ATAGS support is introduced, so that the memory info can be
>     used from previous bootloaders that do not understand FDTs at all.
>   * PS_HOLD sysreset and pinctrl-qcom needed some minor tweaks to handle
>     some nuances that challenge the current assumptions.
>   * A pinctrl driver is introduced for MSM8960.
>   * Initial MSM8960 GCC infra is introduced.
> 
> I tested this series on:
>   * Nokia Lumia 520 (msm8227). No working buttons yet as these are
>     exposed as GPIO-over-PMIC-over-SSBI (drivers will be proposed at a
>     later date).
>   * Samsung Galaxy Express GT-I8730 (msm8930). Volume rockers + home
>     button are working via the new pinctrl-msm8960 driver. Power
>     button not working yet (needs PMIC driver infra).
>   * I have no msm8960/apq8064 devices, looking for folks to test those.
> 
> To confirm there was no regressions with ARM64 and/or newer devices, I
> also tested on:
>   * db410c (msm8916)
>   * google-sargo (sdm670)
> 
> Signed-off-by: Sam Day <me at samcday.com>
> ---
> Sam Day (16):
>        serial: msm: UARTDM <1.4 support
>        timer: Qualcomm KPSS timer support
>        arm: save_prev_bl_data: ARM32 support
>        mach-snapdragon: qcom_parse_memory 32-bit support
>        mach-snapdragon: gate ARM64 features
>        mach-snapdragon: introduce ARCH_SNAPDRAGON_ARM32
>        configs: introduce qcom_armv7_defconfig
>        board: qualcomm: add MSM8960 debug UART config
>        sysreset: qcom-pshold: offset support
>        pinctrl: qcom: configurable GPIO offset/stride
>        pinctrl: qcom: introduce MSM8960 driver
>        mach-snapdragon: parse incoming ARM32 ATAGS
>        clk: qcom: MSM8960 GCC driver
>        clk: qcom: arch-agnostic pointer fmtstrings
>        serial: msm: wait for TX empty before reinit
>        button: remap phone HOMEPAGE button
> 
>   arch/arm/Kconfig                             |  11 +-
>   arch/arm/lib/save_prev_bl_data.c             |  49 ++++---
>   arch/arm/mach-snapdragon/Kconfig             |   6 +
>   arch/arm/mach-snapdragon/board.c             | 188 ++++++++++++++++++--------
>   arch/arm/mach-snapdragon/include/mach/gpio.h |  12 +-
>   board/qualcomm/debug-msm8960.config          |   5 +
>   configs/qcom_armv7_defconfig                 |  61 +++++++++
>   drivers/button/Kconfig                       |   2 +-
>   drivers/button/button-uclass.c               |   1 +
>   drivers/clk/qcom/Kconfig                     |   8 ++
>   drivers/clk/qcom/Makefile                    |   1 +
>   drivers/clk/qcom/clock-msm8960.c             | 189 +++++++++++++++++++++++++++
>   drivers/clk/qcom/clock-qcom.c                |   8 +-
>   drivers/gpio/msm_gpio.c                      |   2 +-
>   drivers/pinctrl/qcom/Kconfig                 |   9 ++
>   drivers/pinctrl/qcom/Makefile                |   1 +
>   drivers/pinctrl/qcom/pinctrl-msm8960.c       | 135 +++++++++++++++++++
>   drivers/pinctrl/qcom/pinctrl-qcom.c          |   2 +-
>   drivers/serial/serial_msm.c                  | 142 +++++++++++++++++---
>   drivers/sysreset/sysreset_qcom-pshold.c      |   9 +-
>   drivers/timer/Kconfig                        |   7 +
>   drivers/timer/Makefile                       |   1 +
>   drivers/timer/qcom-kpss-timer.c              |  98 ++++++++++++++
>   23 files changed, 843 insertions(+), 104 deletions(-)
> ---
> base-commit: 8d3ba3753bdb5068884196ff696cc48177bfdda5
> change-id: 20260530-qcom-armv7-1486308a835c
> 
> Best regards,

This looks great! I have a Sony Xperia SP (MSM8960T) and would like to 
test it.

Before I dive in, I need to clarify the build setup:

- For cross-compilation, should I use `CROSS_COMPILE=arm-none-eabi-`?
- Which defconfig is appropriate for the Xperia SP?
- Is the config generated with `make qcom_armv7_defconfig 
qcom-phone.config`?

Would appreciate a quick pointer on the build workflow.

-- 
Thanks,
Antony K. S.