[U-Boot] [PATCH v4 00/20] dm: tegra: Move nyan-big, jetson-tk1, beaver to livetree

[Marcel Ziswiler <marcel.ziswiler@toradex.com>]

On Tue, 2017-07-11 at 21:29 -0600, Simon Glass wrote:
> This moves four entire boards to use a live device tree as an example
> of
> the impact.
> 
> Nyan-big was chosen because I can easily and boot U-Boot without any
> media swapping, etc. Beaver is enabled as well since it failed to
> boot
> with serial v1 due to a disabled console node. Jetson-TK1 is chosen
> because I found some USB problems in the v2 patches. Jetson-TX1 is
> added
> because Stephen Warren found some problems with PCI.
> 
> Total code size impact on this board is approximately 9KB on U-Boot
> and
> 64 bytes on SPL:
> 
> 27: dm: tegra: nyan-big: Move to livetree
>        arm: (for 1/1 boards) all +9264.0 bss -16.0 data +44.0 rodata
> +92.0
>           spl/u-boot-spl:all +326.0 spl/u-boot-spl:rodata +262.0
>           spl/u-boot-spl:text +64.0 text +9144.0
> 
> Tegra does not use Thumb2, which would likely reduce the code size by
> about
> 25%, indicating a code-size impact of perhaps 7KB.
> 
> Boot time is affected slightly. For nyan-big the times with flat tree
> are:
> 
>                  2,108  dm_r
>                  7,924  dm_spl
>                120,724  dm_f
>                171,816  lcd
> 
> With the livetree:
> 
>                    721  dm_r
>                  3,764  of_live
>                  7,990  dm_spl
>                120,736  dm_f
>                168,215  lcd
> 
> As expected the spl and pre-relocation times are not affected. In the
> post-relocation case, the live tree must be built, which here takes
> about
> 3.8ms. Driver-model device creation takes a bit of 1ms less time with
> the
> livetree, so all up the cost is about 2.4ms. After DM init there
> appears
> to be a slight reduction in the time taken to set up devices (from
> 327ms
> to 319ms) so overall the live tree does not appear to be any slower.
> This
> is because pre-parsing the device tree makes reading it later faster.
> 
> The use of livetree is controlled by a the CONFIG_OF_LIVE option.
> When
> enabled, U-Boot builds a livetree immediately after relocation and
> uses
> it from then on.
> 
> This series is available at u-boot-dm/livet-working
> 
> Changes in v4:
> - Add new patch to add ofnode_read_resource()
> - Add new patch to fix up ofnode_get_addr_index() for 64-bit values
> - Update to use ofnode_read_resource()
> - Drop fdtdec.h header
> - Update to deal with rename of ofnode_read_prop()
> - Rebase to master
> - Drop changes already applied
> - Fix PCI and i2c init problems on jetson-tx1

Could you elaborate a little bit more on this as from the actual patch
set I don't seem to be able to figure out how/what exactly you did in
that respect.

Other than that it at least works for me on my Beaver and Jetson TK1 so
you may add the following to the whole series:

Tested-by: Marcel Ziswiler <marcel.ziswiler@toradex.com>
Tested-on: Beaver, Jetson-TK1

> Changes in v3:
> - Update commit message, enable for all tegra124 boards not just
> nyan-big
> - Add new patch to convert tegra PCI to device tree
> - Enable livetree for jetson-tk1 also
> 
> Changes in v2:
> - Enable livetree for beaver also
> - Add timing information
> 
> Simon Glass (20):
>   dm: core: Add ofnode_read_resource()
>   dm: core: Fix up ofnode_get_addr_index() for 64-bit values
>   tegra: spl: Enable debug UART
>   tegra: tegra124: Add a PMC syscon driver
>   dm: tegra: Convert USB setup to livetree
>   dm: tegra: Convert clock_decode_periph_id() to support livetree
>   dm: video: tegra124: Convert to livetree
>   tegra: dts: Move stdout-path to /chosen
>   dm: tegra: gpio: Convert to support livetree
>   dm: tegra: usb: Convert to livetree
>   dm: tegra: spi: Convert to livetree
>   dm: tegra: i2c: Convert to livetree
>   dm: tegra: pwm: Convert to livetree
>   dm: tegra: mmc: Convert to livetree
>   dm: tegra: pci: Convert to livetree
>   power: Add a regulator driver for the as3722 PMIC
>   power: Add a GPIO driver for the as3722 PMIC
>   dm: power: Convert as3722 to driver model
>   fdtdec: Drop old compatible values
>   dm: tegra: Move nyan-big, jetson-tk1/tx1, beaver to livetree
> 
>  arch/arm/dts/tegra124-nyan-big.dts            |   5 +-
>  arch/arm/include/asm/arch-tegra/clock.h       |   2 +-
>  arch/arm/include/asm/arch-tegra/tegra.h       |   5 +
>  arch/arm/include/asm/arch-tegra/xusb-padctl.h |   2 +-
>  arch/arm/mach-tegra/Kconfig                   |   2 +
>  arch/arm/mach-tegra/board2.c                  |   8 +-
>  arch/arm/mach-tegra/clock.c                   |   5 +-
>  arch/arm/mach-tegra/spl.c                     |   4 +
>  arch/arm/mach-tegra/tegra124/Makefile         |   1 +
>  arch/arm/mach-tegra/tegra124/pmc.c            |  19 ++
>  arch/arm/mach-tegra/tegra124/xusb-padctl.c    |  36 +++-
>  arch/arm/mach-tegra/tegra210/xusb-padctl.c    |  42 +++-
>  arch/arm/mach-tegra/xusb-padctl-common.c      |  60 +++---
>  arch/arm/mach-tegra/xusb-padctl-common.h      |   8 +-
>  arch/arm/mach-tegra/xusb-padctl-dummy.c       |   2 +-
>  board/cei/cei-tk1-som/cei-tk1-som.c           |   2 +
>  board/nvidia/jetson-tk1/jetson-tk1.c          |   2 +
>  board/nvidia/nyan-big/nyan-big.c              |  22 +-
>  board/toradex/apalis-tk1/apalis-tk1.c         |   6 +
>  configs/apalis-tk1_defconfig                  |   3 +
>  configs/beaver_defconfig                      |   1 +
>  configs/cei-tk1-som_defconfig                 |   3 +
>  configs/jetson-tk1_defconfig                  |   4 +
>  configs/nyan-big_defconfig                    |   2 +
>  configs/p2371-2180_defconfig                  |   1 +
>  drivers/core/ofnode.c                         |  30 ++-
>  drivers/core/read.c                           |   5 +
>  drivers/core/read_extra.c                     |  25 +--
>  drivers/gpio/tegra_gpio.c                     |  10 +-
>  drivers/i2c/tegra_i2c.c                       |   7 +-
>  drivers/mmc/tegra_mmc.c                       |  17 +-
>  drivers/pci/pci_tegra.c                       |  53 +++--
>  drivers/power/pmic/Makefile                   |   2 +-
>  drivers/power/pmic/as3722.c                   | 292 +++++++++-------
> ----------
>  drivers/power/pmic/as3722_gpio.c              | 120 +++++++++++
>  drivers/power/regulator/Kconfig               |   9 +
>  drivers/power/regulator/Makefile              |   1 +
>  drivers/power/regulator/as3722_regulator.c    | 149 +++++++++++++
>  drivers/pwm/tegra_pwm.c                       |   2 +-
>  drivers/spi/tegra114_spi.c                    |  15 +-
>  drivers/spi/tegra20_sflash.c                  |   2 +-
>  drivers/spi/tegra20_slink.c                   |   2 +-
>  drivers/spi/tegra210_qspi.c                   |   2 +-
>  drivers/usb/host/ehci-tegra.c                 |  36 ++--
>  drivers/video/tegra124/display.c              |   8 +-
>  drivers/video/tegra124/dp.c                   |   3 +-
>  drivers/video/tegra124/sor.c                  |  25 +--
>  include/dm/ofnode.h                           |   4 +
>  include/dm/read.h                             |  26 ++-
>  include/fdtdec.h                              |   6 -
>  include/power/as3722.h                        |  27 ++-
>  lib/fdtdec.c                                  |   6 -
>  52 files changed, 698 insertions(+), 433 deletions(-)
>  create mode 100644 arch/arm/mach-tegra/tegra124/pmc.c
>  create mode 100644 drivers/power/pmic/as3722_gpio.c
>  create mode 100644 drivers/power/regulator/as3722_regulator.c