diff options
Diffstat (limited to 'target/linux/brcm2708/patches-4.19/950-0161-Revert-rtc-pcf8523-properly-handle-oscillator-stop-b.patch')
-rw-r--r-- | target/linux/brcm2708/patches-4.19/950-0161-Revert-rtc-pcf8523-properly-handle-oscillator-stop-b.patch | 56 |
1 files changed, 0 insertions, 56 deletions
diff --git a/target/linux/brcm2708/patches-4.19/950-0161-Revert-rtc-pcf8523-properly-handle-oscillator-stop-b.patch b/target/linux/brcm2708/patches-4.19/950-0161-Revert-rtc-pcf8523-properly-handle-oscillator-stop-b.patch deleted file mode 100644 index b9a4f52e5a..0000000000 --- a/target/linux/brcm2708/patches-4.19/950-0161-Revert-rtc-pcf8523-properly-handle-oscillator-stop-b.patch +++ /dev/null @@ -1,56 +0,0 @@ -From 0557d41d861b8c214b3472749482efdc71363dbb Mon Sep 17 00:00:00 2001 -From: Phil Elwell <phil@raspberrypi.org> -Date: Mon, 29 Oct 2018 14:45:45 +0000 -Subject: [PATCH] Revert "rtc: pcf8523: properly handle oscillator stop - bit" - -This reverts commit ede44c908d44b166a5b6bd7caacd105c2ff5a70f. - -See: https://github.com/raspberrypi/firmware/issues/1065 - -Signed-off-by: Phil Elwell <phil@raspberrypi.org> ---- - drivers/rtc/rtc-pcf8523.c | 25 ++++++++++++++++++++++--- - 1 file changed, 22 insertions(+), 3 deletions(-) - ---- a/drivers/rtc/rtc-pcf8523.c -+++ b/drivers/rtc/rtc-pcf8523.c -@@ -212,8 +212,28 @@ static int pcf8523_rtc_read_time(struct - if (err < 0) - return err; - -- if (regs[0] & REG_SECONDS_OS) -- return -EINVAL; -+ if (regs[0] & REG_SECONDS_OS) { -+ /* -+ * If the oscillator was stopped, try to clear the flag. Upon -+ * power-up the flag is always set, but if we cannot clear it -+ * the oscillator isn't running properly for some reason. The -+ * sensible thing therefore is to return an error, signalling -+ * that the clock cannot be assumed to be correct. -+ */ -+ -+ regs[0] &= ~REG_SECONDS_OS; -+ -+ err = pcf8523_write(client, REG_SECONDS, regs[0]); -+ if (err < 0) -+ return err; -+ -+ err = pcf8523_read(client, REG_SECONDS, ®s[0]); -+ if (err < 0) -+ return err; -+ -+ if (regs[0] & REG_SECONDS_OS) -+ return -EAGAIN; -+ } - - tm->tm_sec = bcd2bin(regs[0] & 0x7f); - tm->tm_min = bcd2bin(regs[1] & 0x7f); -@@ -249,7 +269,6 @@ static int pcf8523_rtc_set_time(struct d - return err; - - regs[0] = REG_SECONDS; -- /* This will purposely overwrite REG_SECONDS_OS */ - regs[1] = bin2bcd(tm->tm_sec); - regs[2] = bin2bcd(tm->tm_min); - regs[3] = bin2bcd(tm->tm_hour); |