UbiquitousOS
/
OpenCloudOS-Kernel
mirror of https://gitee.com/OpenCloudOS/OpenCloudOS-Kernel.git
11
0
Fork 0
Code Issues Projects Releases Wiki Activity

power: supply: sc27xx: Add suspend/resume interfaces 

Add fuel gauge platform suspend and resume interfaces. In suspend state,
we should enable the low voltage and coulomb counter threshold interrupts
to wake up system to calibrate the battery capacity in lower voltage stage.

Signed-off-by: Yuanjiang Yu <yuanjiang.yu@unisoc.com>
Signed-off-by: Baolin Wang <baolin.wang@linaro.org>
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
This commit is contained in:
Yuanjiang Yu 2018-11-14 17:07:07 +08:00 committed by Sebastian Reichel
parent edcb1c0a3f
commit e2fb615b69
1 changed files with 77 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

77
drivers/power/supply/sc27xx_fuel_gauge.c
View File

@ -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,
}
};