static int rs5c313_rtc_read_time(struct device *dev, struct rtc_time *tm)
{
int data;
+ int cnt;
+ cnt = 0;
while (1) {
RS5C313_CEENABLE; /* CE:H */
RS5C313_CEDISABLE;
ndelay(700); /* CE:L */
+ if (cnt++ > 100) {
+ dev_err(dev, "%s: timeout error\n", __func__);
+ return -EIO;
+ }
}
data = rs5c313_read_reg(RS5C313_ADDR_SEC);
data |= (rs5c313_read_reg(RS5C313_ADDR_SEC10) << 4);
- tm->tm_sec = BCD2BIN(data);
+ tm->tm_sec = bcd2bin(data);
data = rs5c313_read_reg(RS5C313_ADDR_MIN);
data |= (rs5c313_read_reg(RS5C313_ADDR_MIN10) << 4);
- tm->tm_min = BCD2BIN(data);
+ tm->tm_min = bcd2bin(data);
data = rs5c313_read_reg(RS5C313_ADDR_HOUR);
data |= (rs5c313_read_reg(RS5C313_ADDR_HOUR10) << 4);
- tm->tm_hour = BCD2BIN(data);
+ tm->tm_hour = bcd2bin(data);
data = rs5c313_read_reg(RS5C313_ADDR_DAY);
data |= (rs5c313_read_reg(RS5C313_ADDR_DAY10) << 4);
- tm->tm_mday = BCD2BIN(data);
+ tm->tm_mday = bcd2bin(data);
data = rs5c313_read_reg(RS5C313_ADDR_MON);
data |= (rs5c313_read_reg(RS5C313_ADDR_MON10) << 4);
- tm->tm_mon = BCD2BIN(data) - 1;
+ tm->tm_mon = bcd2bin(data) - 1;
data = rs5c313_read_reg(RS5C313_ADDR_YEAR);
data |= (rs5c313_read_reg(RS5C313_ADDR_YEAR10) << 4);
- tm->tm_year = BCD2BIN(data);
+ tm->tm_year = bcd2bin(data);
if (tm->tm_year < 70)
tm->tm_year += 100;
data = rs5c313_read_reg(RS5C313_ADDR_WEEK);
- tm->tm_wday = BCD2BIN(data);
+ tm->tm_wday = bcd2bin(data);
RS5C313_CEDISABLE;
ndelay(700); /* CE:L */
static int rs5c313_rtc_set_time(struct device *dev, struct rtc_time *tm)
{
int data;
+ int cnt;
+ cnt = 0;
/* busy check. */
while (1) {
RS5C313_CEENABLE; /* CE:H */
RS5C313_MISCOP;
RS5C313_CEDISABLE;
ndelay(700); /* CE:L */
+
+ if (cnt++ > 100) {
+ dev_err(dev, "%s: timeout error\n", __func__);
+ return -EIO;
+ }
}
- data = BIN2BCD(tm->tm_sec);
+ data = bin2bcd(tm->tm_sec);
rs5c313_write_reg(RS5C313_ADDR_SEC, data);
rs5c313_write_reg(RS5C313_ADDR_SEC10, (data >> 4));
- data = BIN2BCD(tm->tm_min);
+ data = bin2bcd(tm->tm_min);
rs5c313_write_reg(RS5C313_ADDR_MIN, data );
rs5c313_write_reg(RS5C313_ADDR_MIN10, (data >> 4));
- data = BIN2BCD(tm->tm_hour);
+ data = bin2bcd(tm->tm_hour);
rs5c313_write_reg(RS5C313_ADDR_HOUR, data);
rs5c313_write_reg(RS5C313_ADDR_HOUR10, (data >> 4));
- data = BIN2BCD(tm->tm_mday);
+ data = bin2bcd(tm->tm_mday);
rs5c313_write_reg(RS5C313_ADDR_DAY, data);
rs5c313_write_reg(RS5C313_ADDR_DAY10, (data>> 4));
- data = BIN2BCD(tm->tm_mon + 1);
+ data = bin2bcd(tm->tm_mon + 1);
rs5c313_write_reg(RS5C313_ADDR_MON, data);
rs5c313_write_reg(RS5C313_ADDR_MON10, (data >> 4));
- data = BIN2BCD(tm->tm_year % 100);
+ data = bin2bcd(tm->tm_year % 100);
rs5c313_write_reg(RS5C313_ADDR_YEAR, data);
rs5c313_write_reg(RS5C313_ADDR_YEAR10, (data >> 4));
- data = BIN2BCD(tm->tm_wday);
+ data = bin2bcd(tm->tm_wday);
rs5c313_write_reg(RS5C313_ADDR_WEEK, data);
RS5C313_CEDISABLE; /* CE:H */
static void rs5c313_check_xstp_bit(void)
{
struct rtc_time tm;
+ int cnt;
RS5C313_CEENABLE; /* CE:H */
if (rs5c313_read_cntreg() & RS5C313_CNTREG_WTEN_XSTP) {
rs5c313_write_cntreg(0x07);
/* busy check. */
- while (rs5c313_read_cntreg() & RS5C313_CNTREG_ADJ_BSY)
+ for (cnt = 0; cnt < 100; cnt++) {
+ if (!(rs5c313_read_cntreg() & RS5C313_CNTREG_ADJ_BSY))
+ break;
RS5C313_MISCOP;
+ }
memset(&tm, 0, sizeof(struct rtc_time));
tm.tm_mday = 1;
MODULE_AUTHOR("kogiidena , Nobuhiro Iwamatsu <iwamatsu@nigauri.org>");
MODULE_DESCRIPTION("Ricoh RS5C313 RTC device driver");
MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);