hwmon: pm8xxx-adc: Add BATT_ID_THERM configuration
PM8018 ADC arbiter uses a single AMUX8 channel to
read either battery id or battery tempertaure. On
existing platforms these pins are grounded.
Add default configuration to read battery ID. If clients
need to read the battery temperature instead, follow the
instructions in the comments for the ADC channel listing.
Clients would need to update the scaling function in the
channel configuration to use the appropriate battery
thermistor scaling function.
CRs-Fixed: 350907
Change-Id: Ia3a8054c9be1e90d2076fd583ef8480353b78c6d
Signed-off-by: Siddartha Mohanadoss <smohanad@codeaurora.org>
diff --git a/arch/arm/mach-msm/board-9615.c b/arch/arm/mach-msm/board-9615.c
index 6c6a5c2..53cec38 100644
--- a/arch/arm/mach-msm/board-9615.c
+++ b/arch/arm/mach-msm/board-9615.c
@@ -132,10 +132,16 @@
ADC_DECIMATION_TYPE2, ADC_SCALE_DEFAULT},
{"vph_pwr", CHANNEL_VPH_PWR, CHAN_PATH_SCALING2, AMUX_RSV1,
ADC_DECIMATION_TYPE2, ADC_SCALE_DEFAULT},
- {"batt_therm", CHANNEL_BATT_THERM, CHAN_PATH_SCALING1, AMUX_RSV2,
- ADC_DECIMATION_TYPE2, ADC_SCALE_BATT_THERM},
- {"batt_id", CHANNEL_BATT_ID, CHAN_PATH_SCALING1, AMUX_RSV2,
- ADC_DECIMATION_TYPE2, ADC_SCALE_DEFAULT},
+ /* AMUX8 is used to read either Batt_id/Batt_therm.
+ * Current configuration is to support Batt_id. If clients
+ * want to read the Batt_therm, the scaling function needs to be
+ * updated to use ADC_SCALE_BATT_THERM instead of ADC_SCALE_DEFAULT.
+ * E.g.
+ * {"batt_therm", CHANNEL_BATT_ID_THERM, CHAN_PATH_SCALING1,
+ * AMUX_RSV2, ADC_DECIMATION_TYPE2, ADC_SCALE_BATT_THERM},
+ */
+ {"batt_id", CHANNEL_BATT_ID_THERM, CHAN_PATH_SCALING1,
+ AMUX_RSV2, ADC_DECIMATION_TYPE2, ADC_SCALE_DEFAULT},
{"pmic_therm", CHANNEL_DIE_TEMP, CHAN_PATH_SCALING1, AMUX_RSV1,
ADC_DECIMATION_TYPE2, ADC_SCALE_PMIC_THERM},
{"625mv", CHANNEL_625MV, CHAN_PATH_SCALING1, AMUX_RSV1,