[U-Boot] [PATCH v3 0/9] arm: exynos: Fix reboot on Odroid HC1

[Krzysztof Kozlowski]

On Tue, 5 Mar 2019 at 11:16, Minkyu Kang <mk7.kang at samsung.com> wrote:
>
> Dear Krzysztof Kozlowski,
>
> On 24/02/2019 21:55, Anand Moon wrote:
> > Hi Krzysztof,
> >
> > Please add my. on Odroid HC1
> >
> > Tested-by: Anand Moon <linux.amoon at gmail.com>
> >
> > Best Regards
> > -Anand
> >
> > On Sat, 16 Feb 2019 at 15:16, Krzysztof Kozlowski <krzk at kernel.org> wrote:
> >>
> >> Hi,
> >>
> >> Changes since v2
> >> ================
> >> 1. Add Lukasz review tags.
> >> 2. Patch 7: Return on error, as suggested by Simon.
> >> 2. Patch 3: Use IS_ENABLED() to run revision detection only
> >>    once - either during late display board or misc_init_r.
> >>
> >> Changes since v1
> >> ================
> >> 1. Move fixes to beginning of patchset.
> >> 2. Patch 3: Rework the idea - split revision detection to be executed later.
> >> 3. Patch 4: New patch.
> >> 4. Patch 6: Apply Simon's comments.
> >> 5. Patch 6: Do not delay when changing voltage if regulator is disabled.
> >> 6. Patch 6: Do not delay when disabling the regulator.
> >>
> >>
> >> Description
> >> ===========
> >> Odroid HC1 does not reboot properly (at least from SD card but
> >> I do not expect difference on eMMC), if LDO4/VDD_ADC was turned
> >> off by Linux kernel.  This condition happens so far always, because
> >> Linux kernel did not enable ADC on Odroid HC1, therefore the
> >> VDD_ADC regulator was turned off as unused.
> >>
> >> The issue is in detection of revision which later is used to load
> >> proper DTB.
> >>
> >> The revision is obtained by ADC read of a voltage depending on VDD_ADC.
> >> Therefore:
> >> 1. VDD_ADC has to be turned on (but board detection happens before
> >>    power is initialized),
> >> 2. Turning VDD_ADC should wait with ramp delay,
> >> 3. Reading the value from ADC should wait for it to stabilize.
> >>
> >> Tested on Odroid XU3-Lite and Odroid HC1.
> >>
> >> Commends and testing are welcomed.
> >>
> >> Best regards,
> >> Krzysztof
> >>
> >> Krzysztof Kozlowski (9):
> >>   adc: exynos-adc: Fix wrong bit operation used to stop the ADC
> >>   power: regulator: s2mps11: Fix step for LDO27 and LDO35
> >>   arm: exynos: Detect revision later, when all resources are ready
> >>   arm: exynos: odroid-xu3: Display info late to have proper type
> >>   arm: exynos: Wait till ADC stabilizes before checking Odroid HC1
> >>     revision
> >>   regulator: Add support for ramp delay
> >>   power: regulator: s2mps11: Add enable delay
> >>   arm: dts: exynos: Add supply for ADC block to Odroid XU3 family
> >>   arm: dts: exynos: Add ramp delay property to LDO regulators to Odroid
> >>     XU3 family
> >>
> >>  arch/arm/dts/exynos5422-odroidxu3.dts         | 20 +++++++
> >>  board/samsung/common/board.c                  | 24 ++++++++-
> >>  board/samsung/common/exynos5-dt-types.c       | 54 +++++++++++++++++--
> >>  board/samsung/odroid/odroid.c                 |  8 +++
> >>  configs/odroid-xu3_defconfig                  |  2 +
> >>  .../regulator/regulator.txt                   |  2 +
> >>  drivers/adc/exynos-adc.c                      |  2 +-
> >>  drivers/power/regulator/regulator-uclass.c    | 47 +++++++++++++++-
> >>  drivers/power/regulator/s2mps11_regulator.c   | 15 +++++-
> >>  include/power/regulator.h                     |  2 +
> >>  include/samsung/misc.h                        |  1 +
> >>  11 files changed, 167 insertions(+), 10 deletions(-)
> >>
> >> --
> >> 2.17.1
> >>
> >> _______________________________________________
> >> U-Boot mailing list
> >> U-Boot at lists.denx.de
> >> https://lists.denx.de/listinfo/u-boot
> >
> >
>
> Patch looks good but could you please rebase on latest u-boot-samsung tree?
>
> Applying: adc: exynos-adc: Fix wrong bit operation used to stop the ADC
> Applying: power: regulator: s2mps11: Fix step for LDO27 and LDO35
> Applying: arm: exynos: Detect revision later, when all resources are ready
> Applying: arm: exynos: odroid-xu3: Display info late to have proper type
> error: patch failed: configs/odroid-xu3_defconfig:11
> error: configs/odroid-xu3_defconfig: patch does not apply
> Patch failed at 0004 arm: exynos: odroid-xu3: Display info late to have proper type

Sure, let me rebase.

Best regards,
Krzysztof