[RFC 0/4] Run barebox on sc6531e-based feature phone

[Antony Pavlov]

On Tue, 4 Jul 2023 14:03:56 +0200
Sascha Hauer <s.hauer at pengutronix.de> wrote:

> Hi Antony,
> 
> This has stayed unanswered for some time.
> 
> I am not sure what I should do with it. In the current form I think it's
> a bit too basic to be useful. Maybe we can add it once the LCD and
> Keypad driver is ready?

It's just RFC. With LCD and keypad support SC6531E barebox port will be a nice
demo for barebox presentation and can be added to mainline repo.

There are some ready-to-use SC6531E drivers in the https://github.com/strongtz/linux-sprd repo.
LCD display is connected via SPI so drivers/spi/spi-sprd.c can be used,
also we need backlight driver.
Keypad is supported by drivers/input/keyboard/sprd_keypad.c.


> Sascha
> 
> On Sat, Jun 10, 2023 at 01:32:16PM +0300, Antony Pavlov wrote:
> > This patch series adds initial support for SC6531E chip.
> > 
> > SC6431E chip is specially designed solution for creating
> > feature phones. It contains
> > 
> >   * ARM926EJ-S core (up to 208 MHz)
> >   * embedded PSRAM
> >   * peripherals: USB, SPI, UART, IIS, PCM, I2C, keypad, LCD
> >   * SIM card and GSM/GPRS/FM/BT stuff
> > 
> > This work is based on FPDoom, see [1], [2], [3] for details.
> > 
> > At the moment only timer and debug_ll output via USB
> > are supported.
> > 
> > After adding lcd and keypad driver running bareDOOM [4]
> > on SC6531E will be possible.
> > 
> >   [1] https://github.com/ilyakurdyukov/fpdoom
> >   [2] https://habr.com/ru/articles/706766/
> >   [3] https://www.youtube.com/watch?v=tln_Iace1O8
> >   [4] https://github.com/a3f/bareDOOM
> > 
> > Antony Pavlov (4):
> >   clocksource: add sc6531e driver
> >   ARM: add sc6531e and F+ Ezzy 4 phone support
> >   sc6531e: add debug_ll support
> >   Documentation: add sc6531e instructions
> > 
> >  Documentation/boards/sc6531e.rst          | 187 +++++++++
> >  arch/arm/Kconfig                          |  10 +
> >  arch/arm/Makefile                         |   1 +
> >  arch/arm/boards/Makefile                  |   1 +
> >  arch/arm/boards/ezzy-4/Makefile           |   6 +
> >  arch/arm/boards/ezzy-4/env/init/automount |  27 ++
> >  arch/arm/boards/ezzy-4/lowlevel.c         |  19 +
> >  arch/arm/boards/ezzy-4/usbio.c            | 449 ++++++++++++++++++++++
> >  arch/arm/configs/ezzy-4_defconfig         |  49 +++
> >  arch/arm/cpu/uncompress.c                 |   7 +
> >  arch/arm/dts/Makefile                     |   1 +
> >  arch/arm/dts/ezzy-4.dts                   |  22 ++
> >  arch/arm/include/asm/debug_ll.h           |   2 +
> >  arch/arm/mach-sc6531e/Kconfig             |  17 +
> >  arch/arm/mach-sc6531e/Makefile            |   3 +
> >  drivers/clocksource/Makefile              |   1 +
> >  drivers/clocksource/timer-sc6531e.c       |  70 ++++
> >  include/mach/sc6531e/debug_ll.h           |  17 +
> >  18 files changed, 889 insertions(+)
> >  create mode 100644 Documentation/boards/sc6531e.rst
> >  create mode 100644 arch/arm/boards/ezzy-4/Makefile
> >  create mode 100644 arch/arm/boards/ezzy-4/env/init/automount
> >  create mode 100644 arch/arm/boards/ezzy-4/lowlevel.c
> >  create mode 100644 arch/arm/boards/ezzy-4/usbio.c
> >  create mode 100644 arch/arm/configs/ezzy-4_defconfig
> >  create mode 100644 arch/arm/dts/ezzy-4.dts
> >  create mode 100644 arch/arm/mach-sc6531e/Kconfig
> >  create mode 100644 arch/arm/mach-sc6531e/Makefile
> >  create mode 100644 drivers/clocksource/timer-sc6531e.c
> >  create mode 100644 include/mach/sc6531e/debug_ll.h
> > 
> > -- 
> > 2.39.0
> > 
> > 
> 
> -- 
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-- 
Best regards,
  Antony Pavlov