从dts里的of_device节点中获取变量值实例

static int palmas_rtc_probe(struct platform_device *pdev)
{
struct palmas *palmas = dev_get_drvdata(pdev->dev.parent);
struct palmas_rtc *palmas_rtc = NULL;
struct palmas_platform_data *palmas_pdata;
struct palmas_rtc_platform_data *rtc_pdata = NULL;
int ret;
bool enable_bb_charging = false;
bool high_bb_charging;




palmas_pdata = dev_get_platdata(pdev->dev.parent);
if (palmas_pdata)
rtc_pdata = palmas_pdata->rtc_pdata;


if (rtc_pdata) {
enable_bb_charging = rtc_pdata->backup_battery_chargeable;
high_bb_charging = rtc_pdata->backup_battery_charge_high_current;
} else if (pdev->dev.of_node) {
enable_bb_charging = of_property_read_bool(pdev->dev.of_node,
"ti,backup-battery-chargeable");
high_bb_charging = of_property_read_bool(pdev->dev.of_node,
"ti,backup-battery-charge-high-current");
}