[PATCH 0/6] arm: omap: Add back omap4 support

[Bastien Curutchet <bastien.curutchet@bootlin.com>]

Hi all,

This series aims to add back the omap4 support. This support was removed
by commit b0ee3fe642c ("arm: ti: Remove omap4 platform support") because
at that moment, none of the OMAP4-based boards had done the migration to
DM_I2C.
My use case is an old product based on the Variscite's omap4 system on
module. I needed to upgrade U-Boot on it for security reasons. I think
that this work could benefit to other people who may have same kind of
product to maintain.

Patch 1 to 3 remove the omap's clock driver dependency to the AM33xx
as it is also present in omap4 platforms. I tested these changes on the
beaglebone black to ensure I didn't break the AM33xx case.

Patch 4 & 5 revert the deletion of the omap4 support. The revert makes
checkpatch.pl angry. I fixed quite a lots of warnings already but it
remains two kinds of warnings:
- CamelCase on timings structure, I left the CamelCase because IMHO it's
  more readable this way.
- #ifdef CONFIG_XYZ shouldn't be used anymore. I left one of this because
  I didn't find a clean way to get rid of it.

Patch 6 adds support for the Variscite's system on module. This system on
module is supported by the Linux project through
ti/omap/omap4-var-som-om44.dtsi

Signed-off-by: Bastien Curutchet <bastien.curutchet@bootlin.com>
---
Bastien Curutchet (6):
      arm: omap: Move PRM I2C channel frequency to vc.c
      arm: ti: omap: Extract common clock definitions
      clk: ti: Remove AM33xx dependency
      configs: omap4: remove unused boot target devices
      arm: ti: Introduce back omap4 support
      board: variscite: add support for the omap4_var_som

 arch/arm/dts/omap4-var-stk-om44-u-boot.dtsi       |  54 +++
 arch/arm/include/asm/arch-am33xx/clock.h          |  43 +--
 arch/arm/include/asm/arch-omap4/clock.h           |  84 +++++
 arch/arm/include/asm/arch-omap4/cpu.h             | 109 ++++++
 arch/arm/include/asm/arch-omap4/ehci.h            |  38 ++
 arch/arm/include/asm/arch-omap4/gpio.h            |  34 ++
 arch/arm/include/asm/arch-omap4/hardware.h        |  25 ++
 arch/arm/include/asm/arch-omap4/i2c.h             |  11 +
 arch/arm/include/asm/arch-omap4/mem.h             |  61 ++++
 arch/arm/include/asm/arch-omap4/mmc_host_def.h    |  16 +
 arch/arm/include/asm/arch-omap4/mux_omap4.h       | 325 +++++++++++++++++
 arch/arm/include/asm/arch-omap4/omap.h            | 143 ++++++++
 arch/arm/include/asm/arch-omap4/spl.h             |  22 ++
 arch/arm/include/asm/arch-omap4/sys_proto.h       |  73 ++++
 arch/arm/include/asm/arch-omap5/clock.h           | 104 +-----
 arch/arm/include/asm/mach-types.h                 |   1 +
 arch/arm/include/asm/omap_common.h                |  16 +-
 arch/arm/include/asm/ti-common/omap_clock.h       | 114 ++++++
 arch/arm/mach-omap2/Kconfig                       |  24 +-
 arch/arm/mach-omap2/Makefile                      |   3 +-
 arch/arm/mach-omap2/omap4/Kconfig                 |  23 ++
 arch/arm/mach-omap2/omap4/Makefile                |  10 +
 arch/arm/mach-omap2/omap4/boot.c                  | 103 ++++++
 arch/arm/mach-omap2/omap4/hw_data.c               | 420 ++++++++++++++++++++++
 arch/arm/mach-omap2/omap4/hwinit.c                | 182 ++++++++++
 arch/arm/mach-omap2/omap4/prcm-regs.c             | 306 ++++++++++++++++
 arch/arm/mach-omap2/omap4/sdram_elpida.c          | 265 ++++++++++++++
 arch/arm/mach-omap2/vc.c                          |   2 +
 board/variscite/omap4_var_som/Kconfig             |  12 +
 board/variscite/omap4_var_som/MAINTAINERS         |   6 +
 board/variscite/omap4_var_som/Makefile            |   6 +
 board/variscite/omap4_var_som/omap4_var_som.c     | 172 +++++++++
 board/variscite/omap4_var_som/omap4_var_som_mux.h |  32 ++
 common/spl/Kconfig                                |   4 +-
 configs/omap4_var_som_defconfig                   |  75 ++++
 drivers/clk/ti/clk-ctrl.c                         |  48 ++-
 drivers/i2c/Kconfig                               |   2 +-
 drivers/mmc/Kconfig                               |   2 +-
 include/configs/omap4_var_som.h                   |  16 +
 include/configs/ti_omap4_common.h                 |  40 ---
 40 files changed, 2817 insertions(+), 209 deletions(-)
---
base-commit: 4433253ecf2041f9362a763bb6cb79960921ac7e
change-id: 20260506-omap4-support-9f7d1cc1cd60

Best regards,
-- 
Bastien Curutchet <bastien.curutchet@bootlin.com>