This commit adds unit tests for ADC uclass's methods using sandbox ADC.

Testing proper ADC binding:
- dm_test_adc_bind()                    - device binding
- dm_test_adc_wrong_channel_selection() - checking wrong channel selection

Testing ADC supply operations:
- dm_test_adc_supply():
  - Vdd/Vss values validating
  - Vdd regulator updated value validating
  - Vdd regulator's auto enable state validating

Testing ADC operations results:
- dm_test_adc_single_channel_conversion() - single channel start/data
- dm_test_adc_single_channel_shot()       - single channel shot
- dm_test_adc_multi_channel_conversion()  - multi channel start/data
- dm_test_adc_multi_channel_shot()        - multi channel single shot

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

Some devices are supplied by configurable regulator's output.
But there was no function for getting it. This commit adds
function, that allows for getting the supply device by it's phandle.

The returned regulator device can be used with regulator uclass's API.

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

This driver allows I/O operations on the Samsung S2MPS11 PMIC,
which provides lots of LDO/BUCK outputs.

To enable it, update defconfig with:
- CONFIG_PMIC_S2MPS11
and additional, if were not defined:
- CONFIG_CMD_PMIC
- CONFIG_ERRNO_STR

The binding info: doc/device-tree-bindings/pmic/s2mps11.txt

Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>
Reviewed-by: Simon Glass <sjg@chromium.org>
Tested-by: Anand Moon <linux.amoon@gmail.com>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>

Add a driver for the ACT8846 PMIC. This supports several LDOs and BUCKs and
is connected to the I2C bus. This driver supports using a regulator driver
to access the regulators.

Signed-off-by: Simon Glass <sjg@chromium.org>

* Add pmic pfuze3000 support, implement power_pfuze3000_init to be
  used in power_init_board callback function.

Signed-off-by: Adrian Alonso <aalonso@freescale.com>
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>

This part of mentioned commit, was missed by my mistake during the rebase.
Signed-off-by: Przemyslaw Marczak <p.marczak@samsung.com>

Original commit message:
power: pmic: pfuze100 support driver model

1. Support driver model for pfuze100.
2. Introduce a new Kconfig entry DM_PMIC_PFUZE100 for pfuze100
3. This driver intends to support PF100, PF200 and PF3000, so add
   the device id into the udevice_id array.
4. Rename PMIC_NUM_OF_REGS macro to PFUZE100_NUM_OF_REGS.

Change-Id: I4fc88414f3c0285f9648e47ec7aed60addeccc4d
Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Reviewed-by: Simon Glass <sjg@chromium.org>

This adds a simple pmic driver for the hi6553 pmic which is used in
conjunction with the hi6220 SoC on the hikey board. Eventually this
driver will be updated to be a proper UCLASS PMIC driver which
can parse the voltages direct from device tree.

Signed-off-by: Peter Griffin <peter.griffin@linaro.org>

1. Add new regulator driver pfuze100.
   * Introduce struct pfuze100_regulator_desc for maintaining info
     for one regulator.
2. Add new Kconfig entry DM_REGULATOR_PFUZE100 for pfuze100.
3. This driver intends to support PF100, PF200 and PF3000.
4. Add related macro definition in pfuze header file.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>

We do not need that "regulator-name" property must be provided in dts.
If "regulator-name" property is not provided in dts, node name
will chosen for settings '.name' field of uc_pdata.

Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
Cc: Przemyslaw Marczak <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>