[v5 00/15] Add support for ast2600 ADC

[Billy Tsai]

This patch serials make aspeed_adc.c can support ast2600 and backward
compatible.

Change since v4:
dt-bindings:
  - Add clocks maxItems.
  - Rename the property to meet the property-units.yaml.
  - Add the description for the difference between adc0 and adc1.
aspeed_adc.c:
  - Use new property name to get internal reference voltage: units from mv to
  uv.
  - Fix -Wnonnull warning caused by snprintf parameters.
  - Add suffix mv to the vref parameters.
  - Use ARRAY_SIZE instead of 32.
  - Add a reset action for ADC power down and Use devm_iio_device_register.
  - Fix typo error.
  - Separate the offset interface of ch7 when battery sensing enable

Change since v3:
dt-bindings:
  - Fix properties:aspeed,int_vref_mv type error.

Change since v2:
dt-bindings:
  - Create a new dt-bindings for ast2600 adc
aspeed_adc.c:
  - Splits the patch for more details
  - Remove version enum and use the flags in model data to distinguish
  hardware feature
  - Support trimming data get and set.
  - Use devm_add_action_or_reset to simplify probe error handling.

Changes since v1:
dt-bindings:
  - Fix the aspeed,adc.yaml check error.
  - Add battery-sensing property.
aspeed_adc.c:
  - Change the init flow:
    Clock and reference voltage setting should be completed before adc
    engine enable.
  - Change the default sampling rate to meet most user case.
  - Add patch #8 to suppoert battery sensing mode.

Billy Tsai (15):
  iio: adc: aspeed: set driver data when adc probe.
  dt-bindings: iio: adc: Add ast2600-adc bindings
  iio: adc: aspeed: completes the bitfield declare.
  iio: adc: aspeed: Keep model data to driver data.
  iio: adc: aspeed: Refactory model data structure
  iio: adc: aspeed: Add vref config function
  iio: adc: aspeed: Set num_channels with model data
  iio: adc: aspeed: Use model_data to set clk scaler.
  iio: adc: aspeed: Use devm_add_action_or_reset.
  iio: adc: aspeed: Support ast2600 adc.
  iio: adc: aspeed: Fix the calculate error of clock.
  iio: adc: aspeed: Add func to set sampling rate.
  iio: adc: aspeed: Add compensation phase.
  iio: adc: aspeed: Support battery sensing.
  iio: adc: aspeed: Get and set trimming data.

 .../bindings/iio/adc/aspeed,ast2600-adc.yaml  | 100 +++
 drivers/iio/adc/aspeed_adc.c                  | 617 +++++++++++++++---
 2 files changed, 619 insertions(+), 98 deletions(-)
 create mode 100644 Documentation/devicetree/bindings/iio/adc/aspeed,ast2600-adc.yaml

-- 
2.25.1