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

[Sam Day]

Hi Antony,

On Sunday, 7 June 2026 at 7:37 AM, Antony Kurniawan Soemardi <linux at smankusors.com> wrote:

> 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.

Awesome, I look forward to seeing more qcom armv7 devices booting U-Boot!

> 
> Before I dive in, I need to clarify the build setup:
> 
> - For cross-compilation, should I use `CROSS_COMPILE=arm-none-eabi-`?

Yes, that's right.

> - Which defconfig is appropriate for the Xperia SP?
> - Is the config generated with `make qcom_armv7_defconfig
> qcom-phone.config`?

Yep. You might consider tacking debug-msm8960.config to the end as well, to
enable debug UART.

> 
> Would appreciate a quick pointer on the build workflow.

I think you've just about nailed it already :) If you have any further
questions don't hesitate to DM me on Matrix: @human:samcday.com

Warm Regards,
-Sam

> 
> --
> Thanks,
> Antony K. S.
>