This is the Wiki for the Renesas Salvator-XS (Salvator-X 2nd version) board, which is available in different versions, depending on the actual SiP mounted:
- RTP0RC7795SIPB0012S (with R-Car H3 ES2.0),
- RTP0RC7796SIPB0012S (with R-Car M3-W),
- RTP0RC77965SIPB012S (with R-Car M3-N).
Refer to the R-Car page for information about Renesas' R-Car SoC family.
Use a micro-USB cable to connect to "Debug Serial 0". Serial settings are 115200 8N1.
Unfortunately the CP2102 USB-to-UART bridges on Salvator-XS boards have the same serial strings (0001 resp. 00002 for Debug Serial 0 resp. 1), complicating identifying consoles on multiple boards. If you have multiple boards connected to the same host and you want stable serial ports, there are two options:
- Refer to the ports using the symbolic links under /dev/serial/by-path/, instead of the /dev/ttyUSB* names,
- Program the ports' serial strings to your liking (e.g. salvator-xs-1884-debug0) using the tool at https://github.com/DiUS/cp210x-cfg, and refer to the ports using the symbolic links under /dev/serial/by-id/, instead of the /dev/ttyUSB* names.
* Kernel config: defconfig * Kernel image: arch/arm64/boot/Image * DTB: arch/arm64/boot/dts/renesas/r8a7795-salvator-xs.dtb (for R-Car H3) * DTB: arch/arm64/boot/dts/renesas/r8a7796-salvator-xs.dtb (for R-Car M3-W) * DTB: arch/arm64/boot/dts/renesas/r8a77965-salvator-xs.dtb (for R-Car M3-N)
U-Boot boot command:
tftpboot 0x48080000 Image tftpboot 0x49f00000 r8a7795-salvator-xs.dtb (for R-Car H3) tftpboot 0x49f00000 r8a7796-salvator-xs.dtb (for R-Car M3-W) tftpboot 0x49f00000 r8a77965-salvator-xs.dtb (for R-Car M3-N) booti 0x48080000 - 0x49f00000
PSCI System Suspend
The system can be suspended by triggering a PSCI System Suspend:
echo mem > /sys/power/state
- 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
- On kernels up to and including v4.18, the "backup_mode" sysfs file doesn't exist. Hence you must use i2cset instead, and repeat this operation after each wake-up:
i2cset -f -y 7 0x30 0x20 0x0F
- PSCI System Suspend supports wake-up by PMIC only. Switch SW23 on to resume the system.
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
Suspend-to-Idle supports the following wake-up sources:
- gpio-keys: Not enabled in the upstream kernel due to sharing of GPIOs between switches and LEDs, but see Remote Control below.
- 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
|Operation||Signal A||Pin A||Signal B||Pin B||Connector needed||Comments|
|Reset||#MRB/SYSRSTn||EXIO-D pin 66||GND||EXIO-D pin 58||Samtec QTE-020 or -040|
|Wake-Up||IRQ1n/GP2_01||EXIO-D pin 50||GND||EXIO-D pin 46||Samtec QTE-020 or -040||Needs arm64: dts: salvator-common: Enable GP2_1 for wake-up from renesas-drivers#topic/board-farm|
|ACC OFF||#RSTB/EX_PWRONn||EXIO-D pin 68||D5.0V||CN7 pin 4||Samtec QTE-020 or -040, and 5¼ HDD power||Pull high via 10K resistor to power off (47K to D12.0V might be better, cfr. Ebisu, but is untested)|