fuze+: add unknown channel to debug menu

imx233: always divide physical channels by two for wider range

The Fuze+ OF monitors channel 2 but I'm unable to determine the meaning of it.
Print the value on the debug menu so that people can have a look at it.

Change-Id: I8a942febeafbce06014178abda12e38a16c26664

3 files changed, 5 insertions, 2 deletions

diff --git a/firmware/target/arm/imx233/adc-imx233.c b/firmware/target/arm/imx233/adc-imx233.c
index 21447bbda7..08adba442d 100644
--- a/firmware/target/arm/imx233/adc-imx233.c
+++ b/firmware/target/arm/imx233/adc-imx233.c
@@ -76,7 +76,7 @@ int adc_read_physical(int src)
 {
     int virt = imx233_lradc_acquire_channel(TIMEOUT_BLOCK);
     // divide by two for wider ranger
-    imx233_lradc_setup_channel(virt, false, false, 0, src);
+    imx233_lradc_setup_channel(virt, true, false, 0, src);
     int val = adc_read_physical_ex(virt);
     imx233_lradc_release_channel(virt);
     return val;
diff --git a/firmware/target/arm/imx233/sansa-fuzeplus/adc-fuzeplus.c b/firmware/target/arm/imx233/sansa-fuzeplus/adc-fuzeplus.c
index 78b88c9e85..7207e5f8a8 100644
--- a/firmware/target/arm/imx233/sansa-fuzeplus/adc-fuzeplus.c
+++ b/firmware/target/arm/imx233/sansa-fuzeplus/adc-fuzeplus.c
@@ -27,6 +27,7 @@ int imx233_adc_mapping[] =
     [ADC_DIE_TEMP] = IMX233_ADC_DIE_TEMP,
     [ADC_VDDIO] = IMX233_ADC_VDDIO,
     [ADC_5V] = HW_LRADC_CHANNEL_5V,
+    [ADC_CH2] = HW_LRADC_CHANNEL(2),
 };
 
 const char *imx233_adc_channel_name[] =
@@ -35,4 +36,5 @@ const char *imx233_adc_channel_name[] =
     "Die temperature(°C)",
     "VddIO",
     "Vdd5V",
+    "Channel 2",
 };
diff --git a/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h b/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
index b7fa5edc86..e9c6f5d00e 100644
--- a/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
+++ b/firmware/target/arm/imx233/sansa-fuzeplus/adc-target.h
@@ -21,11 +21,12 @@
 #ifndef _ADC_TARGET_H_
 #define _ADC_TARGET_H_
 
-#define NUM_ADC_CHANNELS    4
+#define NUM_ADC_CHANNELS    5
 
 #define ADC_BATTERY         0
 #define ADC_DIE_TEMP        1
 #define ADC_VDDIO           2
 #define ADC_5V              3
+#define ADC_CH2             4
 
 #endif