[PATCH 3/4] power: supply: max8998-charger: Parse device tree for required data.

[Paweł Chmiel]

This patch adds missing code for reading charger configuration
from devicetree.

Fixes: ee999fb3f17f ("mfd: max8998: Add support for Device Tree")
Signed-off-by: Paweł Chmiel <pawel.mikolaj.chm...@gmail.com>
---
 drivers/power/supply/max8998_charger.c | 50 ++++++++++++++++++++++++++++++++++
 1 file changed, 50 insertions(+)

diff --git a/drivers/power/supply/max8998_charger.c 
b/drivers/power/supply/max8998_charger.c
index 66438029bdd0..8fa0c3357625 100644
--- a/drivers/power/supply/max8998_charger.c
+++ b/drivers/power/supply/max8998_charger.c
@@ -21,6 +21,7 @@
 
 #include <linux/err.h>
 #include <linux/module.h>
+#include <linux/of.h>
 #include <linux/slab.h>
 #include <linux/platform_device.h>
 #include <linux/power_supply.h>
@@ -82,6 +83,49 @@ 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,
+                                       "max8998,charge-eoc",
+                                       &pdata->eoc);
+       if (ret < 0) {
+               dev_err(iodev->dev,
+                       "Could not find max8998,charge-eoc in devicetree\n");
+               return ret;
+       }
+
+       ret = of_property_read_u32(charger_np,
+                                       "max8998,charge-restart",
+                                       &pdata->restart);
+       if (ret < 0) {
+               dev_err(iodev->dev,
+                       "Could not find max8998,charge-restart in 
devicetree\n");
+               return ret;
+       }
+
+       ret = of_property_read_u32(charger_np,
+                                       "max8998,charge-timeout",
+                                       &pdata->timeout);
+       if (ret < 0) {
+               dev_err(iodev->dev,
+                       "Could not find max8998,charge-timeout in 
devicetree\n");
+               return ret;
+       }
+
+       return 0;
+}
+
 static int max8998_battery_probe(struct platform_device *pdev)
 {
        struct max8998_dev *iodev = dev_get_drvdata(pdev->dev.parent);
@@ -96,6 +140,12 @@ 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)
-- 
2.7.4