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authorFabrice Gasnier2018-11-12 14:03:58 +0100
committerTom Rini2018-11-20 12:35:25 -0500
commit63f004e7aae17a6b6048c88ce7e39d64e58c08c1 (patch)
treed24d457dd1dfedb302da045a978782508556dcc1 /include/adc.h
parentd73d81fd85e4a030ade42c4b2d13466d45090aa3 (diff)
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 <fabrice.gasnier@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
Diffstat (limited to 'include/adc.h')
-rw-r--r--include/adc.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/include/adc.h b/include/adc.h
index d04c9c49262..5841dfb54b9 100644
--- a/include/adc.h
+++ b/include/adc.h
@@ -219,6 +219,17 @@ 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,
* starts the given channel conversion and returns the output data.
@@ -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