[U-Boot] [RFT 0/8] exynos: Fix reboot on Odroid HC1

[Krzysztof Kozlowski <krzk@kernel.org>]

Hi,

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 is 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.

I must admit I did not test it on other boards because latest U-Boot
does not boot from SD card.

Commends and testing are welcomed.

Best regards,
Krzysztof

Krzysztof Kozlowski (8):
  exynos: Redo detection of revision when all resources are ready
  exynos: Wait till ADC stabilizes before checking Odroid HC1 revision
  adc: exynos-adc: Fix wrong bit operation used to stop the ADC
  regulator: Add support for ramp delay
  power: regulator: s2mps11: Fix step for LDO27 and LDO35
  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                | 19 ++++++++-
 board/samsung/common/exynos5-dt-types.c     | 34 +++++++++++++++-
 drivers/adc/exynos-adc.c                    |  2 +-
 drivers/power/regulator/regulator-uclass.c  | 45 ++++++++++++++++++++-
 drivers/power/regulator/s2mps11_regulator.c | 13 +++++-
 include/power/regulator.h                   |  2 +
 7 files changed, 129 insertions(+), 6 deletions(-)

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2.17.1