This patch adds missing code for reading charger configuration
from devicetree.
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chmiel@xxxxxxxxx>
---
Changes from v3:
- Property prefix should be maxim, not max8998
- Changed property name to more meaning full
Changes from v2:
- Make restart level and charge timeout properties optional.
If they're not present in devicetree, assume they're disabled.
Changes from v1:
- Removed unneeded Fixes tag
- Use new property names
---
drivers/power/supply/max8998_charger.c | 60 ++++++++++++++++++++++++++
1 file changed, 60 insertions(+)
diff --git a/drivers/power/supply/max8998_charger.c b/drivers/power/supply/max8998_charger.c
index 9a926c7c0f22..dfd473ed4c5b 100644
--- a/drivers/power/supply/max8998_charger.c
+++ b/drivers/power/supply/max8998_charger.c
@@ -8,6 +8,7 @@
#include <linux/err.h>
#include <linux/module.h>
#include <linux/mod_devicetable.h>
+#include <linux/of.h>
#include <linux/slab.h>
#include <linux/platform_device.h>
#include <linux/power_supply.h>
@@ -69,6 +70,59 @@ static const struct power_supply_desc max8998_battery_desc = {
.num_properties = ARRAY_SIZE(max8998_battery_props),
};
+static int max8998_pmic_dt_parse_pdata(struct max8998_dev *iodev,
+ struct max8998_platform_data *pdata)
+{
+ struct device_node *pmic_np = iodev->dev->of_node;
+ struct device_node *charger_np;
+ int ret;
+
+ charger_np = of_get_child_by_name(pmic_np, "charger");
+ if (!charger_np) {
+ dev_err(iodev->dev, "could not find charger sub-node\n");
+ return -EINVAL;
+ }
+
+ ret = of_property_read_u32(charger_np,
+ "maxim,end-of-charge-percentage",
+ &pdata->eoc);
+ if (ret < 0) {
+ dev_err(iodev->dev,
+ "Could not find maxim,end-of-charge-percentage in devicetree\n");
+ return ret;
+ }
+
+ ret = of_property_read_u32(charger_np,
+ "maxim,charge-restart-threshold",
+ &pdata->restart);
+ if (ret < 0) {
+ if (ret != -EINVAL) {
+ dev_err(iodev->dev,
+ "Failed to read maxim,charge-restart-threshold\n");
+ return ret;
+ }
+
+ pdata->restart = -1;
+ dev_dbg(iodev->dev, "Charge Restart Threshold disabled\n");
+ }
+
+ ret = of_property_read_u32(charger_np,
+ "maxim,charge-timeout",
+ &pdata->timeout);
+ if (ret < 0) {
+ if (ret != -EINVAL) {
+ dev_err(iodev->dev,
+ "Failed to read maxim,charge-timeout\n");
+ return ret;
+ }
+
+ pdata->timeout = -1;
+ dev_dbg(iodev->dev, "Charge Full Timeout disabled\n");
+ }
+
+ return 0;
+}
+
static int max8998_battery_probe(struct platform_device *pdev)
{
struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@@ -83,6 +137,12 @@ static int max8998_battery_probe(struct platform_device *pdev)
return -ENODEV;
}
+ if (IS_ENABLED(CONFIG_OF) && iodev->dev->of_node) {
+ ret = max8998_pmic_dt_parse_pdata(iodev, pdata);
+ if (ret)
+ return ret;
+ }
+
max8998 = devm_kzalloc(&pdev->dev, sizeof(struct max8998_battery_data),
GFP_KERNEL);
if (!max8998)
--
2.17.1
