i.MX ProcessorsのトピックRe: How to configure Android 4.4.2 to work with two RTCs in the system https://community.nxp.com/t5/i-MX-Processors/How-to-configure-Android-4-4-2-to-work-with-two-RTCs-in-the/m-p/758464#M117943 <HTML><HEAD></HEAD><BODY><P>Hello&nbsp;</P><P></P><P>Unfortunately, what you are willing to do is out of our scope. For that, I highly recommend you to go to professional service support, they can help you.</P><P><STRONG><A class="link-titled" href="https://www.nxp.com/support/support/nxp-professional-services:PROFESSIONAL-SERVICE" title="https://www.nxp.com/support/support/nxp-professional-services:PROFESSIONAL-SERVICE">NXP Professional Services|NXP</A>&nbsp;</STRONG></P><P></P><P>Best Regards,</P><P>Diego.</P></BODY></HTML> Wed, 14 Mar 2018 18:21:02 GMT diegoadrian 2018-03-14T18:21:02Z How to configure Android 4.4.2 to work with two RTCs in the system https://community.nxp.com/t5/i-MX-Processors/How-to-configure-Android-4-4-2-to-work-with-two-RTCs-in-the/m-p/758463#M117942 <HTML><HEAD></HEAD><BODY><P style="color: #51626f; background-color: #ffffff; border: 0px;">I am using iMX6 to build a system based on Android Kit-Kat. On the system I have an external RTC chip which is powered by a separate battery. The external RTC chip does not have an interrupt line connected iMX. The external RTC chip is registered under /sys/class/rtc/rtc0.</P><P style="color: #51626f; background-color: #ffffff; border: 0px;"></P><P style="color: #51626f; background-color: #ffffff; border: 0px;">I have also enabled the internal SRTC on iMX by enabling CONFIG_RTC_DRV_MXC_V2 to build the rtc-mxc_v2.o. The internal SRTC is under&nbsp;<SPAN>/proc/driver/rtc.</SPAN></P><P style="color: #51626f; background-color: #ffffff; border: 0px;"></P><P style="background-color: #ffffff; border: 0px;">Two questions:</P><OL style="background-color: #ffffff; border: 0px; padding: 0px 0px 0px 30px;"><LI style="border: 0px; font-weight: inherit; margin: 0.5ex 0px;">When I have both an external RTC and SRTC on iMX enabled on the system, how do I synchronize the SRTC with the external RTC? The time will be kept on external RTC because it is powered by a separate battery so SRTC has to be synchronized with the external RTC.</LI><LI style="border: 0px; font-weight: inherit; margin: 0.5ex 0px;">How do I configure Android so that when it needs to get time, it gets time from the external RTC; and when it needs to set an alarm to wake up the system in suspend, it sets the alarm using the SRTC on iMX not the external RTC?</LI></OL></BODY></HTML> Wed, 14 Mar 2018 10:00:48 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-configure-Android-4-4-2-to-work-with-two-RTCs-in-the/m-p/758463#M117942 jeffreychang 2018-03-14T10:00:48Z Re: How to configure Android 4.4.2 to work with two RTCs in the system https://community.nxp.com/t5/i-MX-Processors/How-to-configure-Android-4-4-2-to-work-with-two-RTCs-in-the/m-p/758464#M117943 <HTML><HEAD></HEAD><BODY><P>Hello&nbsp;</P><P></P><P>Unfortunately, what you are willing to do is out of our scope. For that, I highly recommend you to go to professional service support, they can help you.</P><P><STRONG><A class="link-titled" href="https://www.nxp.com/support/support/nxp-professional-services:PROFESSIONAL-SERVICE" title="https://www.nxp.com/support/support/nxp-professional-services:PROFESSIONAL-SERVICE">NXP Professional Services|NXP</A>&nbsp;</STRONG></P><P></P><P>Best Regards,</P><P>Diego.</P></BODY></HTML> Wed, 14 Mar 2018 18:21:02 GMT https://community.nxp.com/t5/i-MX-Processors/How-to-configure-Android-4-4-2-to-work-with-two-RTCs-in-the/m-p/758464#M117943 diegoadrian 2018-03-14T18:21:02Z