Differences

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--- en:bpi-r4:start [2024/04/21 12:48] – [thermal] frank
+++ en:bpi-r4:start [2024/05/07 07:56] – [Network] frank
@@ Line 31: / Line 31: @@
 {{:en:bpi-r4:bpi-r4_v1.1_top.jpg?direct&400 |}} {{ :en:bpi-r4:bpi-r4_v1.1_bottom.jpg?direct&400|}}
 ===== thermal =====
+  cat /sys/class/thermal/thermal_zone0/temp
 Uses lvts driver
@@ Line 80: / Line 85: @@
 NETSYS: V2 for mt7986 (bpi-r3) V3 for mt7988 (bpi-r4)
+Daniel tells me that lro should be enabled via userspace with
+  ethtool -N $ifname flow-type tcp4 dst-ip $lan_ip loc 0
 ==== Wifi ====
@@ Line 125: / Line 134: @@
 {{ :en:bpi-r4:bpi-r4-gpio.png?direct&400 |}}
+===== eeprom =====
+BPI-R4 has an eeprom on i2c-mux channel 0
+  [ 1.515672] at24 2-0057: 256 byte 24c02 EEPROM, writable, 1 bytes/write
+write-mode (wp-gpio is linked to green led):
+<code>
+# echo 0 > /sys/devices/platform/gpio-leds/leds/green:status/brightness
+root@bpi-r4-v11:~
+# echo "test" > /sys/bus/i2c/devices/2-0057/eeprom
+root@bpi-r4-v11:~
+# hexdump -C /sys/bus/i2c/devices/2-0057/eeprom
+00000000  74 65 73 74 0a ff ff ff  ff ff ff ff ff ff ff ff  |test............|
+00000010  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
+*
+00000100
+root@bpi-r4-v11:~
+# echo 1 > /sys/devices/platform/gpio-leds/leds/green:status/brightness
+root@bpi-r4-v11:~
+</code>
+===== rtc =====
+Battery connection looks like charging circuit for ml2032. You should not connect non-rechargeable battery like cr2032.
+https://forum.banana-pi.org/t/bpi-r3-bpi-r4-does-the-bpi-r3-r4-have-a-rtc/17763/36
+Connector is JST with 1.25mm pitch
+RTC time will survive software reboot
+<code>
+# dmesg | grep rtc
+[    1.479923] rtc-pcf8563 2-0051: low voltage detected, date/time is not reliable.
+[    1.487390] rtc-pcf8563 2-0051: registered as rtc0
+[    1.493378] rtc-pcf8563 2-0051: low voltage detected, date/time is not reliable.
+[    1.500771] rtc-pcf8563 2-0051: hctosys: unable to read the hardware clock
+root@bpi-r4-v11:~
+# date -s "2024-04-27 09:55 CEST"
+Sat Apr 27 07:55:00 UTC 2024
+root@bpi-r4-v11:~
+# hwclock -w
+root@bpi-r4-v11:~
+# hwclock -r
+-04-27 07:56:23.979830+00:00
+root@bpi-r4-v11:~
+# reboot
+...
+root@bpi-r4-v11:~
+# dmesg | grep rtc
+[    1.480067] rtc-pcf8563 2-0051: registered as rtc0
+[    1.486061] rtc-pcf8563 2-0051: setting system clock to 2024-04-27T07:56:53 )
+root@bpi-r4-v11:~
+# date
+Sat Apr 27 08:00:46 UTC 2024
+root@bpi-r4-v11:~
+</code>
 ===== uboot/ATF =====
@@ Line 130: / Line 196: @@
 currently use these:
-  * uboot: https://github.com/frank-w/u-boot/tree/2023-10-bpi
+  * uboot: https://github.com/frank-w/u-boot/tree/2024-04-bpi
   * ATF: https://github.com/frank-w/u-boot/tree/mtk-atf