21 Nov, 2018

1 commit

• 63f004e7a   dm: adc: add uclass's mask and conversion helpers ... Browse Code »

  Add two functions to ADC uclass's:
  - adc_raw_to_uV() to ease ADC raw value conversion to microvolts
  - adc_channel_mask() to get channels on consumer side

  Signed-off-by: Fabrice Gasnier
  Reviewed-by: Simon Glass

  Fabrice Gasnier

  2018-11-21 01:35:25 +0800  

07 May, 2018

1 commit

• 83d290c56   SPDX: Convert all of our single license tags to Linux Kernel style ... Browse Code »

  56

  When U-Boot started using SPDX tags we were among the early adopters and
  there weren't a lot of other examples to borrow from. So we picked the
  area of the file that usually had a full license text and replaced it
  with an appropriate SPDX-License-Identifier: entry. Since then, the
  Linux Kernel has adopted SPDX tags and they place it as the very first
  line in a file (except where shebangs are used, then it's second line)
  and with slightly different comment styles than us.

  In part due to community overlap, in part due to better tag visibility
  and in part for other minor reasons, switch over to that style.

  This commit changes all instances where we have a single declared
  license in the tag as both the before and after are identical in tag
  contents. There's also a few places where I found we did not have a tag
  and have introduced one.

  Signed-off-by: Tom Rini

  Tom Rini

  2018-05-07 21:34:12 +0800  

02 Nov, 2015

1 commit

• 5decbf530   dm: adc: add simple ADC uclass implementation ... Browse Code »

  This commit adds:
  - new uclass id: UCLASS_ADC
  - new uclass driver: drivers/adc/adc-uclass.c

  The new uclass's API allows for ADC operation on:
  * single-channel with channel selection by a number
  * multti-channel with channel selection by bit mask

  ADC uclass's functions:
  * single-channel:
  - adc_start_channel() - start channel conversion
  - adc_channel_data() - get conversion data
  - adc_channel_single_shot() - start/get conversion data
  * multi-channel:
  - adc_start_channels() - start selected channels conversion
  - adc_channels_data() - get conversion data
  - adc_channels_single_shot() - start/get conversion data for channels
  selected by bit mask
  * general:
  - adc_stop() - stop the conversion
  - adc_vdd_value() - positive reference Voltage value with polarity [uV]
  - adc_vss_value() - negative reference Voltage value with polarity [uV]
  - adc_data_mask() - conversion data bit mask

  The device tree can provide below constraints/properties:
  - vdd-polarity-negative: if true: Vdd = vdd-microvolts * (-1)
  - vss-polarity-negative: if true: Vss = vss-microvolts * (-1)
  - vdd-supply: phandle to Vdd regulator's node
  - vss-supply: phandle to Vss regulator's node
  And optional, checked only if the above corresponding, doesn't exist:
  - vdd-microvolts: positive reference Voltage [uV]
  - vss-microvolts: negative reference Voltage [uV]

  Signed-off-by: Przemyslaw Marczak
  Cc: Simon Glass
  Signed-off-by: Minkyu Kang

  Przemyslaw Marczak

  2015-11-02 09:38:00 +0800