R-Car/Boards/Ebisu
Introduction
This is the Wiki for the Renesas Ebisu (RTP0RC77990SEB0010S) and Ebisu-4D (RTP0RC77990SEB0020S) boards, which are equipped with R-Car E3 SoCs. Refer to the R-Car page for information about Renesas' R-Car SoC family.
Serial Console
Use a micro-USB cable to connect to "Debug Serial 0" (CN25). Serial settings are 115200 8N1.
Booting Linux
* Kernel config: defconfig * Kernel image: arch/arm64/boot/Image * DTB: arch/arm64/boot/dts/renesas/r8a77990-ebisu.dtb
U-Boot boot command:
tftpboot 0x50000000 Image tftpboot 0x58000000 r8a77990-ebisu.dtb booti 0x50000000 - 0x58000000
Suspend-to-RAM
PSCI System Suspend
The system can be suspended by triggering a PSCI System Suspend:
echo mem > /sys/power/state
Caveats:
- Before you can use the above, you must configure the PMIC for DDR Backup Mode first, using the command below, followed by switching SW23 off:
echo on > /sys/bus/i2c/drivers/bd9571mwv/*/bd9571mwv-regulator*/backup_mode
- PSCI System Suspend supports wake-up by PMIC only. Switch SW23 on to resume the system.
Suspend-to-Idle
If you want to suspend the system, and wake up through other wake-up sources, you must use Suspend-to-Idle instead of PSCI System Suspend.
The system can be suspended ("frozen") using:
echo freeze > /sys/power/state
Alternatively (since v4.10), you can configure the system to use Suspend-to-Idle by default:
echo s2idle > /sys/power/mem_sleep
After that, you can suspend the system using the standard:
echo mem > /sys/power/state
Wake-Up Sources
Suspend-to-Idle supports the following wake-up sources:
- ravb (Ethernet): Configure using one of:
ethtool -s eth0 wol g # Enable wake on MagicPacket ethtool -s eth0 wol d # Disable
Wake-up by sending a MagicPacket from another system using:
wakeonlan <mac-address> | <hostname> | <ip-address> # <hostname> or <ip-address> must be in /etc/ethers
- sh-sci (Serial): Disabled by default
- usb: Disabled by default
Remote Control
Operation | Signal A | Pin A | Signal B | Pin B | Connector needed | Comments |
Reset | #MRB/SYSRSTn | EXIO-D pin 66 | GND | EXIO-D center | Samtec QTE-020 or -040 | |
ACC OFF | #RSTB/EX_PWRONn | EXIO-D pin 68 | D12.0V | CN32 pin 1 | Samtec QTE-020 or -040, JST PHR-7 | Pull high via 47K resistor to power off |