[U-Boot] [PATCH v2 0/8] arm: socfpga: implement proper peripheral reset handling

[Simon Goldschmidt]

This series implements peripheral reset handling for socfpga gen5.

It moves from enabling all peripherals during SPL startup to using the
socfpga reset driver from all peripherals and enabling peripherals when
they are used.

As Linux cannot even handle this in 4.20, the reset driver implements a
compatibility mode where it takes all peripherals out of reset before
jumpint to the OS if an environment variable "socfpga_permodrst_ungate=1"
is found. This is enabled by default for socfpga gen5 boards, but should
be moved to default off in the near future once a Linux kernel supports
reset handling for all drivers.

Changes in v2:
- cleanly merged Linux dts (moved change of SDR controller base address
  to a separate patch)
- port DDR driver to DM UCLASS_RAM
- don't change DDR calibration training driver (code got too big)
- use reset.h code instead of socfpga_per_reset()
- fix copy/paste issues
- add .remove callback to release the resets
- add .remove callback to release the resets
- moved from Kernel option "OLD_SOCFPGA_KERNEL_COMPAT" to environment
  variable "socfpga_permodrst_ungate"
- this patch is new in v2
- removed Kconfig option OLD_SOCFPGA_KERNEL_COMPAT since compatibility
  now uses an environment variable

Simon Goldschmidt (8):
  arm: socfpga: gen5: sync devicetrees to Linux
  arm: socfpga: gen5: add reset & sdr node to SPL devicetrees
  arm: socfpga: move gen5 SDR driver to DM
  mtd: rawnand: denali: add reset handling
  spi: cadence_qspi: add reset handling
  reset: socfpga: add reset handling for old kernels
  arm: socfpga: gen5: deassert peripheral reset by default
  arm: socfpga: implement proper peripheral reset

 arch/arm/Kconfig                              |   2 +
 arch/arm/dts/socfpga.dtsi                     |  23 ++-
 arch/arm/dts/socfpga_arria5_socdk-u-boot.dtsi |   8 +
 arch/arm/dts/socfpga_cyclone5_dbm_soc1.dts    |   8 +
 .../socfpga_cyclone5_de0_nano_soc-u-boot.dtsi |   8 +
 arch/arm/dts/socfpga_cyclone5_de10_nano.dts   |   8 +
 arch/arm/dts/socfpga_cyclone5_de1_soc.dts     |   8 +
 arch/arm/dts/socfpga_cyclone5_is1.dts         |   8 +
 .../dts/socfpga_cyclone5_socdk-u-boot.dtsi    |   8 +
 .../dts/socfpga_cyclone5_sockit-u-boot.dtsi   |   8 +
 .../dts/socfpga_cyclone5_socrates-u-boot.dtsi |   8 +
 arch/arm/dts/socfpga_cyclone5_socrates.dts    |   2 -
 arch/arm/dts/socfpga_cyclone5_sr1500.dts      |   8 +
 .../socfpga_cyclone5_vining_fpga-u-boot.dtsi  |   8 +
 .../mach-socfpga/include/mach/sdram_gen5.h    |   4 -
 arch/arm/mach-socfpga/misc_gen5.c             |  10 --
 arch/arm/mach-socfpga/spl_gen5.c              |  39 ++---
 drivers/ddr/altera/Kconfig                    |   1 +
 drivers/ddr/altera/sdram_gen5.c               | 143 ++++++++++++++++--
 drivers/ddr/altera/sequencer.c                |   9 +-
 drivers/ddr/altera/sequencer.h                |  35 +++++
 drivers/mtd/nand/raw/denali.h                 |   2 +
 drivers/mtd/nand/raw/denali_dt.c              |  14 ++
 drivers/reset/reset-socfpga.c                 |  34 +++++
 drivers/spi/cadence_qspi.c                    |  16 ++
 drivers/spi/cadence_qspi.h                    |   4 +
 include/configs/socfpga_common.h              |  14 ++
 27 files changed, 374 insertions(+), 66 deletions(-)

-- 
2.17.1