From 63f004e7aae17a6b6048c88ce7e39d64e58c08c1 Mon Sep 17 00:00:00 2001 From: Fabrice Gasnier Date: Mon, 12 Nov 2018 14:03:58 +0100 Subject: dm: adc: add uclass's mask and conversion helpers 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 --- include/adc.h | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+) (limited to 'include/adc.h') diff --git a/include/adc.h b/include/adc.h index d04c9c4926..5841dfb54b 100644 --- a/include/adc.h +++ b/include/adc.h @@ -218,6 +218,17 @@ int adc_channels_data(struct udevice *dev, unsigned int channel_mask, */ int adc_data_mask(struct udevice *dev, unsigned int *data_mask); +/** + * adc_channel_mask() - get channel mask for given ADC device + * + * This can be used if adc uclass platform data is filled. + * + * @dev: ADC device to check + * @channel_mask: pointer to the returned channel bitmask + * @return: 0 if OK, -ve on error + */ +int adc_channel_mask(struct udevice *dev, unsigned int *channel_mask); + /** * adc_channel_single_shot() - get output data of conversion for the ADC * device's channel. This function searches for the device with the given name, @@ -284,4 +295,14 @@ int adc_vss_value(struct udevice *dev, int *uV); */ int adc_stop(struct udevice *dev); +/** + * adc_raw_to_uV() - converts raw value to microvolts for given ADC device. + * + * @dev: ADC device used from conversion + * @raw: raw value to convert + * @uV: converted value in microvolts + * @return: 0 on success or -ve on error + */ +int adc_raw_to_uV(struct udevice *dev, unsigned int raw, int *uV); + #endif -- cgit v1.2.3