R-Car/Boards/Salvator-XS
Introduction
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.
Serial Console
Use a micro-USB cable to connect to "Debug Serial 0". Serial settings are 115200 8N1.
Booting Linux
* 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)
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) booti 0x48080000 - 0x49f00000
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
- 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.
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:
- 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> | <ip-address> # <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 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 |
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 |