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en:pcf8563rtc [2017/02/28 17:29] odroid [Estimated life cycle of the battery] |
en:pcf8563rtc [2017/04/04 20:25] mdrjr [Ubuntu] |
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| odroid@odroid:~$ sudo apt install device-tree-compiler | odroid@odroid:~$ sudo apt install device-tree-compiler | ||
| odroid@odroid:~$ sudo fdtput -t s /media/boot/meson64_odroidc2.dtb /i2c@c1108500/pcf8563@51 status "okay" | odroid@odroid:~$ sudo fdtput -t s /media/boot/meson64_odroidc2.dtb /i2c@c1108500/pcf8563@51 status "okay" | ||
| - | odroid@odroid:~$ echo "aml_i2c"|sudo tee -a /etc/modules | + | odroid@odroid:~$ echo "aml_i2c"|sudo tee -a /etc/modules |
| + | odroid@odroid:~$ echo "rtc_pcf8563"|sudo tee -a /etc/modules | ||
| odroid@odroid:~$ reboot</code> | odroid@odroid:~$ reboot</code> | ||
| - Check the I2C & RTC module status after reboot: <code>odroid@odroid64:~$ cat /etc/modules | - Check the I2C & RTC module status after reboot: <code>odroid@odroid64:~$ cat /etc/modules | ||
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| exit 0 | exit 0 | ||
| - | |||
| - | ^G Get Help ^O Write Out ^W Where Is ^K Cut Text ^J Justify ^C Cur Pos | ||
| - | ^X Exit ^R Read File ^\ Replace ^U Uncut Text^T To Linter ^_ Go To Line | ||
| odroid@odroid:~$</code> Add the following at the bottom of the page above exit 0. ^x exit and save the file. Reboot your ODROID-C2. <code>odroid@odroid:~$ sudo reboot</code> If everything worked correctly the RTC on ODROID-C2 should be initialised on boot and the current date and time will be loaded into Linux. You need to check the existence of "rtc-pcf8563" in the output of "lsmod" command when the HW RTC doesn't work correctly. | odroid@odroid:~$</code> Add the following at the bottom of the page above exit 0. ^x exit and save the file. Reboot your ODROID-C2. <code>odroid@odroid:~$ sudo reboot</code> If everything worked correctly the RTC on ODROID-C2 should be initialised on boot and the current date and time will be loaded into Linux. You need to check the existence of "rtc-pcf8563" in the output of "lsmod" command when the HW RTC doesn't work correctly. | ||
| - You can check the current time on the RTC on ODROID-C2 with: <code>odroid@odroid:~$ sudo hwclock -r</code> If this is the first time you have run the RTC on ODROID-C2 it will display a date of APR 20th 2016. | - You can check the current time on the RTC on ODROID-C2 with: <code>odroid@odroid:~$ sudo hwclock -r</code> If this is the first time you have run the RTC on ODROID-C2 it will display a date of APR 20th 2016. | ||
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| <WRAP left round important 100%> | <WRAP left round important 100%> | ||
| ** Kernel update will break the RTC functionality **\\ | ** Kernel update will break the RTC functionality **\\ | ||
| - | To avoid this problem, you need to change the DTB file again after Kernel update \\ | + | To avoid this problem, you can use this workaround that will patch the dtb all the time \\ |
| - | <code>sudo fdtput -t s /media/boot/meson64_odroidc2.dtb /i2c@c1108500/pcf8563@51 status "okay"</code> | + | <code>sudo -s |
| + | echo '#!/bin/sh' > /etc/kernel/postinst.d/rtc | ||
| + | echp 'fdtput -t s /boot/meson64_odroidc2.dtb /i2c@c1108500/pcf8563@51 status "okay"' >> /etc/kernel/postinst.d/rtc | ||
| + | chmod +x /etc/kernel/postinst.d/rtc</code> | ||
| </WRAP> \\ | </WRAP> \\ | ||
| ==== Android ==== | ==== Android ==== | ||
