mfd: 88pm860x: Device tree support

Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>

1 files changed, 31 insertions, 2 deletions

diff --git a/drivers/leds/leds-88pm860x.c b/drivers/leds/leds-88pm860x.c
index 70232b1756f9..b7e8cc0957fc 100644
--- a/drivers/leds/leds-88pm860x.c
+++ b/drivers/leds/leds-88pm860x.c
@@ -12,6 +12,7 @@
 
 #include <linux/kernel.h>
 #include <linux/init.h>
+#include <linux/of.h>
 #include <linux/platform_device.h>
 #include <linux/i2c.h>
 #include <linux/leds.h>
@@ -123,6 +124,33 @@ static void pm860x_led_set(struct led_classdev *cdev,
         schedule_work(&data->work);
 }
 
+#ifdef CONFIG_OF
+static int pm860x_led_dt_init(struct platform_device *pdev,
+                              struct pm860x_led *data)
+{
+        struct device_node *nproot = pdev->dev.parent->of_node, *np;
+        int iset = 0;
+        if (!nproot)
+                return -ENODEV;
+        nproot = of_find_node_by_name(nproot, "leds");
+        if (!nproot) {
+                dev_err(&pdev->dev, "failed to find leds node\n");
+                return -ENODEV;
+        }
+        for_each_child_of_node(nproot, np) {
+                if (!of_node_cmp(np->name, data->name)) {
+                        of_property_read_u32(np, "marvell,88pm860x-iset",
+                                             &iset);
+                        data->iset = PM8606_LED_CURRENT(iset);
+                        break;
+                }
+        }
+        return 0;
+}
+#else
+#define pm860x_led_dt_init(x, y)        (-1)
+#endif
+
 static int pm860x_led_probe(struct platform_device *pdev)
 {
         struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
@@ -179,8 +207,9 @@ static int pm860x_led_probe(struct platform_device *pdev)
         data->chip = chip;
         data->i2c = (chip->id == CHIP_PM8606) ? chip->client : chip->companion;
         data->port = pdev->id;
-        if (pdata && pdata->iset)
-                data->iset = pdata->iset;
+        if (pm860x_led_dt_init(pdev, data))
+                if (pdata)
+                        data->iset = pdata->iset;
 
         data->current_brightness = 0;
         data->cdev.name = data->name;