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- The Link Status input pin (LINKSTA) is not used. The driver instead relies on the PHY to inform it that the link is up by using in-band status messages on the RGMII lines.
- Do not forget to set the correct voltage levels for the pins (3.3v, 1.5v, etc..) in the device tree in the pinctrl node.
- You use the syntax "power-source = <3300>;" when you declare the pins for Ethernet. If an Ethernet PHY supports multiple voltages (3.3v or 1.8v), then choose the lower voltage because the Electrical Characteristics are better.
- Refer to the pinctrl documentation in the kernel for more info.
- Documentation/devicetree/bindings/pinctrl/renesas,rzg2l-pinctrl.yaml
- Documentation/devicetree/bindings/pinctrl/renesas,pcf.yaml
- In the Device Tree, the MDIO address is set by @x and the "reg =<x>;" For example, MDIO address of 0:
phy0: ethernet-phy@0 {
reg = <0>;
- If using MII (not RGMII), do not include output-enable; in txc{ } in your Device Tree. For RGMII, TX_CLK is always an output. But for MII, TX_CLK pin needs to be an input, so output-enable should not be set.
Device Tree Examples
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PCIe
Notes
- PCIe testing using SSD:
PCIe was enabled by default in the RZ/G2 BSP. But you need to modify the kernel menuconfig to add support for NVME M.2 SDD.
Example to modify kernel in yocto is:
$ bitbake -c menuconfig virtual/kernelonce menuconfig appears, enable device driver for nvme support and save the changes.
Then build the kernel with new configuration.
$ bitbake linux-renesas -fc compile
$ bitbake linux-renesas -fc install
$ bitbake linux-renesas -fc deploy
Once the built is done, update your kernel and device tree with newly built.
Linux Drivers
- RZ/G2, RZ/G3
Host:
- drivers/pci/controller/pcie-rcar.c
- drivers/pci/controller/pcie-rcar.h
- drivers/pci/controller/pcie-rcar-host.c
- Documentation/devicetree/bindings/pci/rcar-pci.txt
- CONFIG_PCIE_RCAR_HOST=y
End Point:
- drivers/pci/controller/pcie-rcar.c
- drivers/pci/controller/pcie-rcar.h
- drivers/pci/controller/pcie-rcar-ep.c
- Documentation/devicetree/bindings/pci/rcar-pci-ep.yaml
- CONFIG_PCIE_RCAR_EP=y
Notes
- PCIe testing using SSD:
- Enable Kernel configuration:
PCIe was enabled by default in the RZ/G2 BSP. But you need to modify the kernel menuconfig to add support for NVME M.2 SDD.
Example to modify kernel in yocto is:
$ bitbake -c menuconfig virtual/kernelOnce menuconfig appears, enable device driver for nvme support and save the changes.
Then build the kernel with new configuration.
$ bitbake linux-renesas -fc compile
$ bitbake linux-renesas -fc install
$ bitbake linux-renesas -fc deploy
Once the built is done, update your kernel and device tree with newly built.
2. Connect the SSD adapter board to RZ/G2H PCIe slot and check PCIe:
$ root@hihope-rzg2h:~# lspci
00:00.0 PCI bridge: Renesas Technology Corp. Device 0025
01:00.0 Non-Volatile memory controller: Samsung Electronics Co Ltd NVMe SSD Controller SM981/PM981/PM983
$ root@hihope-rzg2h:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 29.7G 0 disk
`-mmcblk0p1 179:1 0 29.7G 0 part
mmcblk0boot0 179:8 0 31.5M 1 disk
mmcblk0boot1 179:16 0 31.5M 1 disk
mmcblk1 179:24 0 14.9G 0 disk
|-mmcblk1p1 179:25 0 512M 0 part
`-mmcblk1p2 179:26 0 1.8G 0 part /
nvme0n1 259:0 0 238.5G 0 disk # recognized the NVME SSD
3. Create a partition on the nvme to use
$ root@hihope-rzg2h:~# fdisk /dev/nvme0n1
Choose "n" to create a new partition
Choose "P" then "1" to create a new primary partition
Use defaults for the sector numbers
Then "w" to write the data to the disk
After partition, "lsblk" command shows this:
$ root@hihope-rzg2h:~# lsblk
NAME MAJ:MIN RM SIZE RO TYPE MOUNTPOINT
mmcblk0 179:0 0 29.7G 0 disk
`-mmcblk0p1 179:1 0 29.7G 0 part
mmcblk0boot0 179:8 0 31.5M 1 disk
mmcblk0boot1 179:16 0 31.5M 1 disk
mmcblk1 179:24 0 14.9G 0 disk
|-mmcblk1p1 179:25 0 512M 0 part
`-mmcblk1p2 179:26 0 1.8G 0 part /
nvme0n1 259:0 0 238.5G 0 disk
`-nvme0n1p1 259:1 0 238.5G 0 part # new partition
4. Create the filesystem:
$ root@hihope-rzg2h:~# mkfs -t ext4 /dev/nvme0n1p15. Create mount point:
$ root@hihope-rzg2h:~# mkdir /mnt/nvme
root@hihope-rzg2h:~# mount /dev/nvme0n1p1 /mnt/nvme
[ 970.462102] EXT4-fs (nvme0n1p1): recovery complete
[ 970.468717] EXT4-fs (nvme0n1p1): mounted filesystem with ordered data mode. Opts: (null)
6. Create file to write/read:
$ root@hihope-rzg2h:~# touch /mnt/nvme/testfile7. Example Example for PCIe performance measured on PCIe Slot port of RZ/G2H, and with a Samsung NVMe SSD PM981a:
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- RZ/G2H, G2M, G2N, G2E:
- CONFIG_xxxPWM_RZ_MTU3=y
- drivers/pwm/pwm-rz-mtu3.c
- RZ/G2L, G2LC, G2UL, V2L:
- CONFIG_xxxGPT_RZG2L=y
- drivers/pwm/gpt-rzg2l.c
Notes
Device Tree Examples
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- RZ/G2H, G2M, G2N, G2E:
- drivers/thermal/rcar_gen3__thermal.c
- CONFIG_RCAR_GEN3_THERMAL=y
- RZ/G2L, G2LC, G2UL, V2L:
- drivers/thermal/rzg2l_thermal.c
- CONFIG_RZG2L_THERMAL=y
- RZ/V2H
- Supported on AI_SDK 5.0 and later
- Enabled by default
- CONFIG_RZG2L_THERMAL=y
Notes
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