imx233/fuze+: rework lradc/adc code, add external temperature sensing(battery)

Rework code to be more useful:
- move battery channel init to lradc
- always init lradc from system (previously from adc)
- don't reserve channels for vddio, nmos or pmos
- implement external temperature sensing using current source
- use this for battery sensing on the Fuze+ (calibration needed)

Change-Id: I5f9a24b9243db7d1e6bdb16b84bc891e61d0c318

1 files changed, 5 insertions, 2 deletions

diff --git a/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h b/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
index e9c6f5d00e..5907eefdc2 100644
--- a/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
+++ b/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
@@ -21,12 +21,15 @@
 #ifndef _ADC_TARGET_H_
 #define _ADC_TARGET_H_
 
-#define NUM_ADC_CHANNELS    5
+#define NUM_ADC_CHANNELS    6
 
 #define ADC_BATTERY         0
 #define ADC_DIE_TEMP        1
 #define ADC_VDDIO           2
 #define ADC_5V              3
-#define ADC_CH2             4
+#define ADC_BATT_TEMP       4
+#define ADC_CH2             5
+
+#define IMX233_ADC_BATT_TEMP_SENSOR     0
 
 #endif