定时关机

增加一个系统服务，定时关机相关接口

 private void setPowerOff(Intent intent) {boolean enable = intent.getBooleanExtra(VAL_POWEROFF,false);Intent inten;if(enable) {inten = new Intent(Intent.ACTION_REQUEST_SHUTDOWN);inten.putExtra(Intent.EXTRA_KEY_CONFIRM,false);inten.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK);mContext.startActivity(inten);} else {inten = new Intent(Intent.ACTION_REBOOT);inten.putExtra("nowait", 1);inten.putExtra("interval", 1);inten.putExtra("window", 0);mContext.sendBroadcast(inten);}}

定时关机app启动调用如下

    public void setTimePowerOff(long time) {Log.d(TAG,"time:" + time);AlarmManager am = (AlarmManager) context.getSystemService(Context.ALARM_SERVICE);Intent intent = new Intent(ACTION);intent.putExtra(CMD_KEY,CMD_ID_POWEROFF);intent.putExtra(VAL_POWEROFF,true);//这里这个intent最后广播会调用上面的系统服务setPowerOffPendingIntent pendingIntent = PendingIntent.getBroadcast(context, 0,intent, PendingIntent.FLAG_CANCEL_CURRENT);am.set(AlarmManager.RTC_WAKEUP, time, pendingIntent);}

      long time =  System.currentTimeMillis() + 10 * 1000;//10秒后关机setTimePowerOff(time);

定时关机，实际基本没什么困难。

定时开机

设备外接的rtc芯片为pcf8563,要实现硬件开机，硬件上需要将pcf8563的INT脚接到POWER KEY上,具体硬件具体接法，实际流程是达到设置的时间后pcf8563会将INT脚接低，此时INT接接在POWER KEY上就相当于常按开机键进行开机，开机启动后在清除pcf8563的状态使INT脚变高.
只是提供给特定软件使用，所以增加的不是系统接口，直接使用JNI进行设置定时开机
pcf8563驱动修改

diff --git a/lichee/linux-3.4/drivers/rtc/rtc-pcf8563.c b/lichee/linux-3.4/drivers/rtc/rtc-pcf8563.c
index cd3b4bb..ed4ae78 100755
--- a/lichee/linux-3.4/drivers/rtc/rtc-pcf8563.c
+++ b/lichee/linux-3.4/drivers/rtc/rtc-pcf8563.c
@@ -24,6 +24,9 @@#define PCF8563_REG_ST1       0x00 /* status */#define PCF8563_REG_ST2        0x01
+#define PCF8563_BIT_AIE       (1 << 1)
+#define PCF8563_BIT_AF        (1 << 3)
+#define PCF8563_BITS_ST2_N    (7 << 5)#define PCF8563_REG_SC        0x02 /* datetime */#define PCF8563_REG_MN       0x03
@@ -183,10 +186,130 @@ static int pcf8563_rtc_set_time(struct device *dev, struct rtc_time *tm)return pcf8563_set_datetime(to_i2c_client(dev), tm);}-static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alrm)
+static int pcf8563_read_block_data(struct i2c_client *client, unsigned char reg,
+                 unsigned char length, unsigned char *buf){+  struct i2c_msg msgs[] = {+      {/* setup read ptr */
+          .addr = client->addr,
+          .len = 1,
+          .buf = &reg,
+      },
+      {+          .addr = client->addr,
+          .flags = I2C_M_RD,
+          .len = length,
+          .buf = buf
+      },
+  };
+
+  if ((i2c_transfer(client->adapter, msgs, 2)) != 2) {+      dev_err(&client->dev, "%s: read error\n", __func__);
+      return -EIO;
+  }
+
+  return 0;
+}
+
+static int pcf8563_write_block_data(struct i2c_client *client,
+                 unsigned char reg, unsigned char length,
+                 unsigned char *buf)
+{+  int i, err;
+
+  for (i = 0; i < length; i++) {+      unsigned char data[2] = { reg + i, buf[i] };
+
+      err = i2c_master_send(client, data, sizeof(data));
+      if (err != sizeof(data)) {+          dev_err(&client->dev,
+              "%s: err=%d addr=%02x, data=%02x\n",
+              __func__, err, data[0], data[1]);
+          return -EIO;
+      }
+  }
+
+  return 0;
+}
+
+static int pcf8563_set_alarm_mode(struct i2c_client *client, bool on)
+{+  unsigned char buf;
+  int err;
+
+  err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, &buf);
+  if (err < 0)
+      return err;
+
+  if (on)
+      buf |= PCF8563_BIT_AIE;
+  else
+      buf &= ~PCF8563_BIT_AIE;
+
+  buf &= ~(PCF8563_BIT_AF | PCF8563_BITS_ST2_N);
+
+  err = pcf8563_write_block_data(client, PCF8563_REG_ST2, 1, &buf);
+  if (err < 0) {+      dev_err(&client->dev, "%s: write error\n", __func__);
+      return -EIO;
+  }
+
+  return 0;
+}
+
+static int pcf8563_get_alarm_mode(struct i2c_client *client, unsigned char *en,
+                unsigned char *pen)
+{+  unsigned char buf;
+  int err;
+
+  err = pcf8563_read_block_data(client, PCF8563_REG_ST2, 1, &buf);
+  if (err)
+      return err;
+
+  if (en)
+      *en = !!(buf & PCF8563_BIT_AIE);
+  if (pen)
+      *pen = !!(buf & PCF8563_BIT_AF);
+
+  return 0;
+}
+
+static int pcf8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *tm)
+{+  struct i2c_client *client = to_i2c_client(dev);
+  unsigned char buf[4];
+  int err;
+  /* The alarm has no seconds, round up to nearest minute */
+  /*if (tm->time.tm_sec) {
+      time64_t alarm_time = rtc_tm_to_time64(&tm->time);
+
+      alarm_time += 60 - tm->time.tm_sec;
+      rtc_time64_to_tm(alarm_time, &tm->time);
+  }*/
+
+  dev_dbg(dev, "%s, min=%d hour=%d wday=%d mday=%d "
+      "enabled=%d pending=%d\n", __func__,
+      tm->time.tm_min, tm->time.tm_hour, tm->time.tm_wday,
+      tm->time.tm_mday, tm->enabled, tm->pending);
+
+  buf[0] = bin2bcd(tm->time.tm_min);
+  buf[1] = bin2bcd(tm->time.tm_hour);
+  buf[2] = bin2bcd(tm->time.tm_mday);
+  buf[3] = tm->time.tm_wday & 0x07;
+
+  err = pcf8563_write_block_data(client, PCF8563_REG_AMN, 4, buf);
+  if (err)
+      return err;
+
+  return pcf8563_set_alarm_mode(client, 1);}static const struct rtc_class_ops pcf8563_rtc_ops = {@@ -199,7 +322,7 @@ static int pcf8563_probe(struct i2c_client *client,const struct i2c_device_id *id){struct pcf8563 *pcf8563;
-
+  unsigned char alm_pending;int err = 0;dev_dbg(&client->dev, "%s\n", __func__);
@@ -218,7 +341,16 @@ static int pcf8563_probe(struct i2c_client *client,if (!device_can_wakeup(&client->dev)) { //add by hclydaodevice_init_wakeup(&client->dev, 1);}
-
+
+  err = pcf8563_get_alarm_mode(client, NULL, &alm_pending);//清除状态
+  if (err) {+      dev_err(&client->dev, "%s: read error\n", __func__);
+      return err;
+  }
+
+  if (alm_pending)
+      pcf8563_set_alarm_mode(client, 0);
+      pcf8563->rtc = rtc_device_register(pcf8563_driver.driver.name,&client->dev, &pcf8563_rtc_ops, THIS_MODULE);

应用层jni

JNIEXPORT jint JNICALL Java_com_gzease_hwc_Hwc_setRtcPowerOn(JNIEnv * env, jclass obj,jlong millis)
{struct timeval tv;int ret;struct tm tm, *gmtime_res;struct rtc_time rtc;int fd;if (millis <= 0 || millis / 1000LL >= INT_MAX) {return -1;}tv.tv_sec = (time_t) (millis / 1000LL);tv.tv_usec = (suseconds_t) ((millis % 1000LL) * 1000LL);//LOGD("Setting time of day to sec=%d\n", (int) tv.tv_sec);gmtime_res = gmtime_r(&tv.tv_sec, &tm);if (!gmtime_res) {LOGE("gmtime_r() failed: %s\n", strerror(errno));return -1;}memset(&rtc, 0, sizeof(rtc));rtc.tm_sec = tm.tm_sec;rtc.tm_min = tm.tm_min;rtc.tm_hour = tm.tm_hour;rtc.tm_mday = tm.tm_mday;rtc.tm_mon = tm.tm_mon;rtc.tm_year = tm.tm_year;rtc.tm_wday = tm.tm_wday;rtc.tm_yday = tm.tm_yday;rtc.tm_isdst = tm.tm_isdst;/*LOGD("setAlarm RTC date/time: %d/%d/%d %02d:%02d:%02d\n",rtc.tm_mday, rtc.tm_mon + 1, rtc.tm_year + 1900,rtc.tm_hour, rtc.tm_min, rtc.tm_sec);*/fd = open("/dev/rtc0", O_RDONLY|O_NONBLOCK);if (fd == -1) {LOGE("setRtc open /dev/rtc0 error");return -1;}ret = ioctl(fd, RTC_ALM_SET, &rtc);if (ret == -1) {LOGE("ioctl RTC_SET_TIME error");close(fd);return -1;}close(fd);return 0;
}

java层调用

tim =  System.currentTimeMillis() + 60 * 1000;//60秒后开机 最小单位为分钟 不能小于60秒
setTimePowerOn(tim);

同时需要修改/dev/rtc0权限，定时开机设置使用ioctl(fd, RTC_ALM_SET, &rtc)这个会调用到pcf8563驱动中的pcf8563_rtc_set_alarm，当定时时间到后系统启动在pcf8563 probe函数会使用pcf8563_set_alarm_mode清除状态将INT接高.
如果是在系统里加接口有点麻烦，这里就直接用jni进行设置.
参考:
https://blog.csdn.net/zy_style/article/details/53228509?utm_source=blogxgwz9

======================================
作者：hclydao
http://blog.csdn.net/hclydao
版权没有，但是转载请保留此段声明

=======================================

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