HYM8563 RTC: combine several i2c operations to one operation in oder to prevent kerne...

闹钟休眠的时候需要进行i2c传输，某些情况下会出现休眠时i2c超时的情况，导致系统崩溃。
原来连续地址的i2c读写分为1个字节的多次传输，这里将其改为多个字节的一次传输

diff --git a/drivers/rtc/rtc-HYM8563.c b/drivers/rtc/rtc-HYM8563.c
index 1b5690d0804938ef9dafcf8805af271f4e3fc1f6..9c6f9b72f68c3127f943a166d93b2564e5cef38c 100644 (file)
--- a/drivers/rtc/rtc-HYM8563.c
+++ b/drivers/rtc/rtc-HYM8563.c
@@ -93,9 +93,11 @@ static int hym8563_read_datetime(struct i2c_client *client, struct rtc_time *tm)
        u8 i,regs[HYM8563_RTC_SECTION_LEN] = { 0, };
     
        mutex_lock(&hym8563->mutex);
-       for (i = 0; i < HYM8563_RTC_SECTION_LEN; i++) {
-               hym8563_i2c_read_regs(client, RTC_SEC+i, &regs[i], 1);
-       }       
+//     for (i = 0; i < HYM8563_RTC_SECTION_LEN; i++) {
+//             hym8563_i2c_read_regs(client, RTC_SEC+i, &regs[i], 1);
+//     }
+       hym8563_i2c_read_regs(client, RTC_SEC, regs, HYM8563_RTC_SECTION_LEN);
+
        mutex_unlock(&hym8563->mutex);
        
        tm->tm_sec = bcd2bin(regs[0x00] & 0x7F);
@@ -181,9 +183,11 @@ static int hym8563_set_time(struct i2c_client *client, struct rtc_time *tm)
        regs[0x05] = (regs[0x05] & 0x80)| (bin2bcd(tm->tm_mon + 1) & 0x7F);             //set  the  month
        
        mutex_lock(&hym8563->mutex);
-       for(i=0;i<HYM8563_RTC_SECTION_LEN;i++){
-               ret = hym8563_i2c_set_regs(client, RTC_SEC+i, &regs[i], 1);
-       }
+//     for(i=0;i<HYM8563_RTC_SECTION_LEN;i++){
+//             ret = hym8563_i2c_set_regs(client, RTC_SEC+i, &regs[i], 1);
+//     }
+       hym8563_i2c_set_regs(client, RTC_SEC, regs, HYM8563_RTC_SECTION_LEN);
+
        mutex_unlock(&hym8563->mutex);
 
        return 0;