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rtc: at91rm9200: use FIELD_PREP/FIELD_GET 

Use FIELD_PREP and FIELD_GET instead of hardcoding already defined values.

Link: https://lore.kernel.org/r/20191229204421.337612-6-alexandre.belloni@bootlin.com
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
This commit is contained in:
Alexandre Belloni 2019-12-29 21:44:18 +01:00
parent 565205d5ad
commit 3c7b90cb14
1 changed files with 22 additions and 20 deletions
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42
drivers/rtc/rtc-at91rm9200.c
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@ -14,6 +14,7 @@
*/
#include <linux/bcd.h>
#include <linux/bitfield.h>
#include <linux/clk.h>
#include <linux/completion.h>
#include <linux/interrupt.h>
@ -161,20 +162,20 @@ static void at91_rtc_decodetime(unsigned int timereg, unsigned int calreg,
} while ((time != at91_rtc_read(timereg)) ||
(date != at91_rtc_read(calreg)));
tm->tm_sec = bcd2bin((time & AT91_RTC_SEC) >> 0);
tm->tm_min = bcd2bin((time & AT91_RTC_MIN) >> 8);
tm->tm_hour = bcd2bin((time & AT91_RTC_HOUR) >> 16);
tm->tm_sec = bcd2bin(FIELD_GET(AT91_RTC_SEC, time));
tm->tm_min = bcd2bin(FIELD_GET(AT91_RTC_MIN, time));
tm->tm_hour = bcd2bin(FIELD_GET(AT91_RTC_HOUR, time));
/*
* The Calendar Alarm register does not have a field for
* the year - so these will return an invalid value.
*/
tm->tm_year = bcd2bin(date & AT91_RTC_CENT) * 100; /* century */
tm->tm_year += bcd2bin((date & AT91_RTC_YEAR) >> 8); /* year */
tm->tm_year += bcd2bin(FIELD_GET(AT91_RTC_YEAR, date)); /* year */
tm->tm_wday = bcd2bin((date & AT91_RTC_DAY) >> 21) - 1; /* day of the week [0-6], Sunday=0 */
tm->tm_mon = bcd2bin((date & AT91_RTC_MONTH) >> 16) - 1;
tm->tm_mday = bcd2bin((date & AT91_RTC_DATE) >> 24);
tm->tm_wday = bcd2bin(FIELD_GET(AT91_RTC_DAY, date)) - 1; /* day of the week [0-6], Sunday=0 */
tm->tm_mon = bcd2bin(FIELD_GET(AT91_RTC_MONTH, date)) - 1;
tm->tm_mday = bcd2bin(FIELD_GET(AT91_RTC_DATE, date));
}
/*
@ -211,16 +212,17 @@ static int at91_rtc_settime(struct device *dev, struct rtc_time *tm)
at91_rtc_write_idr(AT91_RTC_ACKUPD);
at91_rtc_write(AT91_RTC_TIMR,
bin2bcd(tm->tm_sec) << 0
| bin2bcd(tm->tm_min) << 8
| bin2bcd(tm->tm_hour) << 16);
FIELD_PREP(AT91_RTC_SEC, bin2bcd(tm->tm_sec))
| FIELD_PREP(AT91_RTC_MIN, bin2bcd(tm->tm_min))
| FIELD_PREP(AT91_RTC_HOUR, bin2bcd(tm->tm_hour)));
at91_rtc_write(AT91_RTC_CALR,
bin2bcd((tm->tm_year + 1900) / 100) /* century */
| bin2bcd(tm->tm_year % 100) << 8 /* year */
| bin2bcd(tm->tm_mon + 1) << 16 /* tm_mon starts at zero */
| bin2bcd(tm->tm_wday + 1) << 21 /* day of the week [0-6], Sunday=0 */
| bin2bcd(tm->tm_mday) << 24);
FIELD_PREP(AT91_RTC_CENT,
bin2bcd((tm->tm_year + 1900) / 100))
| FIELD_PREP(AT91_RTC_YEAR, bin2bcd(tm->tm_year % 100))
| FIELD_PREP(AT91_RTC_MONTH, bin2bcd(tm->tm_mon + 1))
| FIELD_PREP(AT91_RTC_DAY, bin2bcd(tm->tm_wday + 1))
| FIELD_PREP(AT91_RTC_DATE, bin2bcd(tm->tm_mday)));
/* Restart Time/Calendar */
cr = at91_rtc_read(AT91_RTC_CR);
@ -259,13 +261,13 @@ static int at91_rtc_setalarm(struct device *dev, struct rtc_wkalrm *alrm)
at91_rtc_write_idr(AT91_RTC_ALARM);
at91_rtc_write(AT91_RTC_TIMALR,
bin2bcd(alrm->time.tm_sec) << 0
| bin2bcd(alrm->time.tm_min) << 8
| bin2bcd(alrm->time.tm_hour) << 16
FIELD_PREP(AT91_RTC_SEC, bin2bcd(alrm->time.tm_sec))
| FIELD_PREP(AT91_RTC_MIN, bin2bcd(alrm->time.tm_min))
| FIELD_PREP(AT91_RTC_HOUR, bin2bcd(alrm->time.tm_hour))
| AT91_RTC_HOUREN | AT91_RTC_MINEN | AT91_RTC_SECEN);
at91_rtc_write(AT91_RTC_CALALR,
bin2bcd(alrm->time.tm_mon + 1) << 16 /* tm_mon starts at zero */
| bin2bcd(alrm->time.tm_mday) << 24
FIELD_PREP(AT91_RTC_MONTH, bin2bcd(alrm->time.tm_mon + 1))
| FIELD_PREP(AT91_RTC_DATE, bin2bcd(alrm->time.tm_mday))
| AT91_RTC_DATEEN | AT91_RTC_MTHEN);
if (alrm->enabled) {