mfd: 88pm860x: Device tree support
Signed-off-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Signed-off-by: Samuel Ortiz <sameo@linux.intel.com>
diff --git a/drivers/rtc/rtc-88pm860x.c b/drivers/rtc/rtc-88pm860x.c
index feddefc..de9e854 100644
--- a/drivers/rtc/rtc-88pm860x.c
+++ b/drivers/rtc/rtc-88pm860x.c
@@ -11,6 +11,7 @@
#include <linux/kernel.h>
#include <linux/module.h>
+#include <linux/of.h>
#include <linux/platform_device.h>
#include <linux/slab.h>
#include <linux/mutex.h>
@@ -284,6 +285,28 @@
}
#endif
+#ifdef CONFIG_OF
+static int __devinit pm860x_rtc_dt_init(struct platform_device *pdev,
+ struct pm860x_rtc_info *info)
+{
+ struct device_node *np = pdev->dev.parent->of_node;
+ int ret;
+ if (!np)
+ return -ENODEV;
+ np = of_find_node_by_name(np, "rtc");
+ if (!np) {
+ dev_err(&pdev->dev, "failed to find rtc node\n");
+ return -ENODEV;
+ }
+ ret = of_property_read_u32(np, "marvell,88pm860x-vrtc", &info->vrtc);
+ if (ret)
+ info->vrtc = 0;
+ return 0;
+}
+#else
+#define pm860x_rtc_dt_init(x, y) (-1)
+#endif
+
static int __devinit pm860x_rtc_probe(struct platform_device *pdev)
{
struct pm860x_chip *chip = dev_get_drvdata(pdev->dev.parent);
@@ -294,8 +317,6 @@
int ret;
pdata = pdev->dev.platform_data;
- if (pdata == NULL)
- dev_warn(&pdev->dev, "No platform data!\n");
info = kzalloc(sizeof(struct pm860x_rtc_info), GFP_KERNEL);
if (!info)
@@ -345,9 +366,11 @@
}
}
rtc_tm_to_time(&tm, &ticks);
- if (pdata && pdata->sync) {
- pdata->sync(ticks);
- info->sync = pdata->sync;
+ if (pm860x_rtc_dt_init(pdev, info)) {
+ if (pdata && pdata->sync) {
+ pdata->sync(ticks);
+ info->sync = pdata->sync;
+ }
}
info->rtc_dev = rtc_device_register("88pm860x-rtc", &pdev->dev,
@@ -366,10 +389,12 @@
#ifdef VRTC_CALIBRATION
/* <00> -- 2.7V, <01> -- 2.9V, <10> -- 3.1V, <11> -- 3.3V */
- if (pdata && pdata->vrtc)
- info->vrtc = pdata->vrtc & 0x3;
- else
- info->vrtc = 1;
+ if (pm860x_rtc_dt_init(pdev, info)) {
+ if (pdata && pdata->vrtc)
+ info->vrtc = pdata->vrtc & 0x3;
+ else
+ info->vrtc = 1;
+ }
pm860x_set_bits(info->i2c, PM8607_MEAS_EN2, MEAS2_VRTC, MEAS2_VRTC);
/* calibrate VRTC */