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| author | Przemyslaw Marczak <p.marczak@samsung.com> | 2015-10-27 13:08:00 +0100 |
|---|---|---|
| committer | Minkyu Kang <mk7.kang@samsung.com> | 2015-11-02 10:38:00 +0900 |
| commit | 5decbf53006c8e2aed8e5506b3961810c1544b3c (patch) | |
| tree | 832fc6e47f2dbb853a8dd0c901be896f77ffc9ca /include/dm | |
| parent | 7c816e24a4e980e2717e5c83090dec73bc4eac57 (diff) | |
| download | u-boot-imx-5decbf53006c8e2aed8e5506b3961810c1544b3c.zip u-boot-imx-5decbf53006c8e2aed8e5506b3961810c1544b3c.tar.gz u-boot-imx-5decbf53006c8e2aed8e5506b3961810c1544b3c.tar.bz2 | |
dm: adc: add simple ADC uclass implementation
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 <p.marczak@samsung.com>
Cc: Simon Glass <sjg@chromium.org>
Signed-off-by: Minkyu Kang <mk7.kang@samsung.com>
Diffstat (limited to 'include/dm')
| -rw-r--r-- | include/dm/uclass-id.h | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/include/dm/uclass-id.h b/include/dm/uclass-id.h index 886a44c..d0cf4ce 100644 --- a/include/dm/uclass-id.h +++ b/include/dm/uclass-id.h @@ -25,6 +25,7 @@ enum uclass_id { UCLASS_SIMPLE_BUS, /* bus with child devices */ /* U-Boot uclasses start here - in alphabetical order */ + UCLASS_ADC, /* Analog-to-digital converter */ UCLASS_CLK, /* Clock source, e.g. used by peripherals */ UCLASS_CPU, /* CPU, typically part of an SoC */ UCLASS_CROS_EC, /* Chrome OS EC */ |