Datasheet describes two modes for reading ADC measurements:
1. continuous, 1 Hz - enabled and started by CONV_RATE bit
2. one-shot - triggered by CONV_START bit
In continuous mode, CONV_START is read-only and signifies an ongoing
conversion.
Change the code to follow the datasheet and really disable continuous
mode for power saving.
Signed-off-by: Michał Mirosław <mirq-linux@xxxxxxxxxxxx>
---
drivers/power/supply/bq25890_charger.c | 33 ++++++++++++++++++++++----
1 file changed, 28 insertions(+), 5 deletions(-)
diff --git a/drivers/power/supply/bq25890_charger.c b/drivers/power/supply/bq25890_charger.c
index 9339e216651f..3b02fa80aedd 100644
--- a/drivers/power/supply/bq25890_charger.c
+++ b/drivers/power/supply/bq25890_charger.c
@@ -126,6 +126,7 @@ static const struct regmap_access_table bq25890_writeable_regs = {
static const struct regmap_range bq25890_volatile_reg_ranges[] = {
regmap_reg_range(0x00, 0x00),
+ regmap_reg_range(0x02, 0x02),
regmap_reg_range(0x09, 0x09),
regmap_reg_range(0x0b, 0x14),
};
@@ -374,18 +375,40 @@ enum bq25890_chrg_fault {
CHRG_FAULT_TIMER_EXPIRED,
};
+static bool bq25890_is_adc_property(enum power_supply_property psp)
+{
+ switch (psp) {
+ case POWER_SUPPLY_PROP_INPUT_VOLTAGE_NOW:
+ case POWER_SUPPLY_PROP_OUTPUT_VOLTAGE_NOW:
+ case POWER_SUPPLY_PROP_VOLTAGE_NOW:
+ case POWER_SUPPLY_PROP_CURRENT_NOW:
+ return true;
+
+ default:
+ return false;
+ }
+}
+
static int bq25890_power_supply_get_property(struct power_supply *psy,
enum power_supply_property psp,
union power_supply_propval *val)
{
- int ret;
struct bq25890_device *bq = power_supply_get_drvdata(psy);
struct bq25890_state state;
+ bool do_adc_conv;
+ int ret;
mutex_lock(&bq->lock);
state = bq->state;
+ do_adc_conv = !state.online && bq25890_is_adc_property(psp);
+ if (do_adc_conv)
+ bq25890_field_write(bq, F_CONV_START, 1);
mutex_unlock(&bq->lock);
+ if (do_adc_conv)
+ regmap_field_read_poll_timeout(bq->rmap_fields[F_CONV_START],
+ ret, !ret, 25000, 1000000);
+
switch (psp) {
case POWER_SUPPLY_PROP_STATUS:
if (!state.online)
@@ -623,8 +646,8 @@ static int bq25890_hw_init(struct bq25890_device *bq)
}
}
- /* Configure ADC for continuous conversions. This does not enable it. */
- ret = bq25890_field_write(bq, F_CONV_RATE, 1);
+ /* Configure ADC for continuous conversions when charging */
+ ret = bq25890_field_write(bq, F_CONV_RATE, !!bq->state.online);
if (ret < 0) {
dev_dbg(bq->dev, "Config ADC failed %d\n", ret);
return ret;
@@ -966,7 +989,7 @@ static int bq25890_suspend(struct device *dev)
* If charger is removed, while in suspend, make sure ADC is diabled
* since it consumes slightly more power.
*/
- return bq25890_field_write(bq, F_CONV_START, 0);
+ return bq25890_field_write(bq, F_CONV_RATE, 0);
}
static int bq25890_resume(struct device *dev)
@@ -982,7 +1005,7 @@ static int bq25890_resume(struct device *dev)
/* Re-enable ADC only if charger is plugged in. */
if (bq->state.online) {
- ret = bq25890_field_write(bq, F_CONV_START, 1);
+ ret = bq25890_field_write(bq, F_CONV_RATE, 1);
if (ret < 0)
return ret;
}
--
2.20.1
