Skip to content
View in the app

A better way to browse. Learn more.
Armbian Community Forums

A full-screen app on your home screen with push notifications, badges and more.

To install this app on iOS and iPadOS
  1. Tap the Share icon in Safari
  2. Scroll the menu and tap Add to Home Screen.
  3. Tap Add in the top-right corner.
To install this app on Android
  1. Tap the 3-dot menu (⋮) in the top-right corner of the browser.
  2. Tap Add to Home screen or Install app.
  3. Confirm by tapping Install.

RTC: which hardware RTC becomes rtc0 at startup?

Marko Buršič
in Advanced users - Development

Featured Replies

When building a kernel the device driver configuration asks which rtc should a system use for NTP and startup synchronisation . By default this is rtc0.

 

The question is: In case there are more hardware RTCs in one embedded system ( in my case onboard RK808 and Dallas DS1307 over I2C), which one would be numbered  as rtc0? Threre are several RTC device drivers available and checked by default, some marked as M and other as '*' , supposing 'module' or 'driver' respectively.

Now if I have two hardware RTCs, I presume they should load as rtc0 and rtc1, but which part does numbering? I can't know this 'a priori' , I would like to use DS1307 for synchronisation.

 

image.thumb.png.8130303133758e9f0eff6b37fac5d2b4.png

Guest
This topic is now closed to further replies.
Go to topic listing

Account

Navigation

Search

Search

Configure browser push notifications
Chrome (Android)
  1. Tap the lock icon next to the address bar.
  2. Tap Permissions → Notifications.
  3. Adjust your preference.
Chrome (Desktop)
  1. Click the padlock icon in the address bar.
  2. Select Site settings.
  3. Find Notifications and adjust your preference.