From 9c5150b31b49e3d89c52df9b1c1ebcea4e665ec3 Mon Sep 17 00:00:00 2001 From: Xunlei Pang Date: Fri, 12 Jun 2015 11:10:16 +0800 Subject: rtc: NTP: Add CONFIG_RTC_SYSTOHC_DEVICE for NTP synchronization Currently, CONFIG_RTC_SYSTOHC uses CONFIG_RTC_HCTOSYS_DEVICE which is originally used by CONFIG_RTC_HCTOSYS, but this rtc device has some limiations, for example, it must be battery-backed, be able to work with irq off and through system suspension, etc. So add CONFIG_RTC_SYSTOHC_DEVICE used exclusively for CONFIG_RTC_SYSTOHC, it is more lenient compared to CONFIG_RTC_HCTOSYS_DEVICE, and could be assigned any available RTC in the system. Default value is CONFIG_RTC_HCTOSYS_DEVICE which is "rtc0" by default. After this patch, NTP will sync up "rtc0" by default. Cc: Paul Bolle Signed-off-by: Xunlei Pang Signed-off-by: Alexandre Belloni --- drivers/rtc/systohc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/rtc/systohc.c') diff --git a/drivers/rtc/systohc.c b/drivers/rtc/systohc.c index 7728d5e32bf4..b4a68ffcd06b 100644 --- a/drivers/rtc/systohc.c +++ b/drivers/rtc/systohc.c @@ -31,7 +31,7 @@ int rtc_set_ntp_time(struct timespec64 now) else rtc_time64_to_tm(now.tv_sec + 1, &tm); - rtc = rtc_class_open(CONFIG_RTC_HCTOSYS_DEVICE); + rtc = rtc_class_open(CONFIG_RTC_SYSTOHC_DEVICE); if (rtc) { /* rtc_hctosys exclusively uses UTC, so we call set_time here, * not set_mmss. */ -- cgit v1.2.3-70-g09d2