rtc-s35390a: backport fix to make hwclock able to read the time

debian/changelog

@@ -13,6 +13,8 @@ linux (4.19.37-6) UNRELEASED; urgency=medium
 
   [ Uwe Kleine-König ]
   * [armhf] Add support for all i.MX6 variants.
+  * rtc-s35390a: backport fix to make hwclock able to read the time
+    (Closes: #932845)
 
  -- Salvatore Bonaccorso <carnil@debian.org>  Sun, 23 Jun 2019 16:15:17 +0200
 

debian/patches/bugfix/all/rtc-s35390a-set-uie_unsupported.patch

@@ -0,0 +1,43 @@
+From: Richard Leitner <richard.leitner@skidata.com>
+Date: Thu, 23 May 2019 13:54:49 +0200
+Subject: [PATCH] rtc: s35390a: set uie_unsupported
+Origin: https://git.kernel.org/linus/c0e12848be091e8410fb427f080f2e0149123443
+Bug-Debian: https://bugs.debian.org/932845
+
+Alarms are only supported on a per minute basis. This is why
+uie_unsupported is set. Furthermore issue a warning when a second based
+alarm is requested.
+
+Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
+Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
+---
+ drivers/rtc/rtc-s35390a.c | 6 ++++++
+ 1 file changed, 6 insertions(+)
+
+diff --git a/drivers/rtc/rtc-s35390a.c b/drivers/rtc/rtc-s35390a.c
+index fb795c454077..4ca37f281ed9 100644
+--- a/drivers/rtc/rtc-s35390a.c
++++ b/drivers/rtc/rtc-s35390a.c
+@@ -289,6 +289,9 @@ static int s35390a_rtc_set_alarm(struct device *dev, struct rtc_wkalrm *alm)
+ 		alm->time.tm_min, alm->time.tm_hour, alm->time.tm_mday,
+ 		alm->time.tm_mon, alm->time.tm_year, alm->time.tm_wday);
+ 
++	if (alm->time.tm_sec != 0)
++		dev_warn(&client->dev, "Alarms are only supported on a per minute basis!\n");
++
+ 	/* disable interrupt (which deasserts the irq line) */
+ 	err = s35390a_set_reg(s35390a, S35390A_CMD_STATUS2, &sts, sizeof(sts));
+ 	if (err < 0)
+@@ -500,6 +503,9 @@ static int s35390a_probe(struct i2c_client *client,
+ 		goto exit_dummy;
+ 	}
+ 
++	/* supports per-minute alarms only, therefore set uie_unsupported */
++	s35390a->rtc->uie_unsupported = 1;
++
+ 	if (status1 & S35390A_FLAG_INT2)
+ 		rtc_update_irq(s35390a->rtc, 1, RTC_AF);
+ 
+-- 
+2.20.1
+

debian/patches/series

@@ -107,6 +107,7 @@ bugfix/all/kbuild-include-addtree-remove-quotes-before-matching-path.patch
 debian/revert-objtool-fix-config_stack_validation-y-warning.patch
 bugfix/all/mt76-use-the-correct-hweight8-function.patch
 bugfix/all/revert-net-stmmac-send-tso-packets-always-from-queue.patch
+bugfix/all/rtc-s35390a-set-uie_unsupported.patch
 
 # Miscellaneous features