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path: root/drivers/power/supply/sc27xx_fuel_gauge.c
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Diffstat (limited to 'drivers/power/supply/sc27xx_fuel_gauge.c')
-rw-r--r--drivers/power/supply/sc27xx_fuel_gauge.c77
1 files changed, 77 insertions, 0 deletions
diff --git a/drivers/power/supply/sc27xx_fuel_gauge.c b/drivers/power/supply/sc27xx_fuel_gauge.c
index 962d0f80babc..8c52e29c7593 100644
--- a/drivers/power/supply/sc27xx_fuel_gauge.c
+++ b/drivers/power/supply/sc27xx_fuel_gauge.c
@@ -789,6 +789,7 @@ static int sc27xx_fgu_probe(struct platform_device *pdev)
data->bat_present = !!ret;
mutex_init(&data->lock);
data->dev = &pdev->dev;
+ platform_set_drvdata(pdev, data);
fgu_cfg.drv_data = data;
fgu_cfg.of_node = np;
@@ -846,6 +847,81 @@ static int sc27xx_fgu_probe(struct platform_device *pdev)
return 0;
}
+#ifdef CONFIG_PM_SLEEP
+static int sc27xx_fgu_resume(struct device *dev)
+{
+ struct sc27xx_fgu_data *data = dev_get_drvdata(dev);
+ int ret;
+
+ ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
+ SC27XX_FGU_LOW_OVERLOAD_INT |
+ SC27XX_FGU_CLBCNT_DELTA_INT, 0);
+ if (ret) {
+ dev_err(data->dev, "failed to disable fgu interrupts\n");
+ return ret;
+ }
+
+ return 0;
+}
+
+static int sc27xx_fgu_suspend(struct device *dev)
+{
+ struct sc27xx_fgu_data *data = dev_get_drvdata(dev);
+ int ret, status, ocv;
+
+ ret = sc27xx_fgu_get_status(data, &status);
+ if (ret)
+ return ret;
+
+ /*
+ * If we are charging, then no need to enable the FGU interrupts to
+ * adjust the battery capacity.
+ */
+ if (status != POWER_SUPPLY_STATUS_NOT_CHARGING)
+ return 0;
+
+ ret = regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
+ SC27XX_FGU_LOW_OVERLOAD_INT,
+ SC27XX_FGU_LOW_OVERLOAD_INT);
+ if (ret) {
+ dev_err(data->dev, "failed to enable low voltage interrupt\n");
+ return ret;
+ }
+
+ ret = sc27xx_fgu_get_vbat_ocv(data, &ocv);
+ if (ret)
+ goto disable_int;
+
+ /*
+ * If current OCV is less than the minimum voltage, we should enable the
+ * coulomb counter threshold interrupt to notify events to adjust the
+ * battery capacity.
+ */
+ if (ocv < data->min_volt) {
+ ret = regmap_update_bits(data->regmap,
+ data->base + SC27XX_FGU_INT_EN,
+ SC27XX_FGU_CLBCNT_DELTA_INT,
+ SC27XX_FGU_CLBCNT_DELTA_INT);
+ if (ret) {
+ dev_err(data->dev,
+ "failed to enable coulomb threshold int\n");
+ goto disable_int;
+ }
+ }
+
+ return 0;
+
+disable_int:
+ regmap_update_bits(data->regmap, data->base + SC27XX_FGU_INT_EN,
+ SC27XX_FGU_LOW_OVERLOAD_INT, 0);
+ return ret;
+}
+#endif
+
+static const struct dev_pm_ops sc27xx_fgu_pm_ops = {
+ SET_SYSTEM_SLEEP_PM_OPS(sc27xx_fgu_suspend, sc27xx_fgu_resume)
+};
+
static const struct of_device_id sc27xx_fgu_of_match[] = {
{ .compatible = "sprd,sc2731-fgu", },
{ }
@@ -856,6 +932,7 @@ static struct platform_driver sc27xx_fgu_driver = {
.driver = {
.name = "sc27xx-fgu",
.of_match_table = sc27xx_fgu_of_match,
+ .pm = &sc27xx_fgu_pm_ops,
}
};