From bd7d5a7115fdc972013f8e51aae48ca768b0c0cf Mon Sep 17 00:00:00 2001
From: Wu Liangqing <wlq@rock-chips.com>
Date: Sat, 5 Mar 2022 15:13:54 +0800
Subject: [PATCH] rtc: hym8563: align the alarm time settings

Signed-off-by: Wu Liangqing <wlq@rock-chips.com>
Change-Id: I59bacd5ef31f67af52313106382ca33734046c72
---
 drivers/rtc/rtc-hym8563.c | 33 ++++++++++++++++++++++++++++++---
 1 file changed, 30 insertions(+), 3 deletions(-)

diff --git a/drivers/rtc/rtc-hym8563.c b/drivers/rtc/rtc-hym8563.c
index b18f3ff9c20f..a03b28f2033e 100644
--- a/drivers/rtc/rtc-hym8563.c
+++ b/drivers/rtc/rtc-hym8563.c
@@ -226,12 +226,39 @@ static int hym8563_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
 			if (alm_tm->tm_hour >= 24) {
 				alm_tm->tm_hour = 0;
 				alm_tm->tm_mday++;
-				if (alm_tm->tm_mday > 31)
-					alm_tm->tm_mday = 0;
+				alm_tm->tm_wday++;
+				if (alm_tm->tm_wday > 6)
+					alm_tm->tm_wday = 0;
+				switch (alm_tm->tm_mon + 1) {
+				case 1:
+				case 3:
+				case 5:
+				case 7:
+				case 8:
+				case 10:
+				case 12:
+					if (alm_tm->tm_mday > 31)
+						alm_tm->tm_mday = 1;
+					break;
+				case 4:
+				case 6:
+				case 9:
+				case 11:
+					if (alm_tm->tm_mday > 30)
+						alm_tm->tm_mday = 1;
+					break;
+				case 2:
+					if (alm_tm->tm_year / 4 == 0) {
+						if (alm_tm->tm_mday > 29)
+							alm_tm->tm_mday = 1;
+					} else if (alm_tm->tm_mday > 28) {
+						alm_tm->tm_mday = 1;
+					}
+					break;
+				}
 			}
 		}
 	}
-
 	ret = i2c_smbus_read_byte_data(client, HYM8563_CTL2);
 	if (ret < 0)
 		return ret;