Device Tree
← RZ-G
- This page contains helpful notes about Device Tree configurations
RZ Specific Files
- Device Tree files for Renesas SoC and evaluation boards are under the directory arch/arm64/boot/dts/renesas
- Below is the list of Device Tree files used for the Renesas Evaluation boards.
RZ/G2H HiHope | |
File | Description |
---|---|
r8a774e1.dtsi | RZ/G2H Device Tree containing all peripherals |
hihope-common.dtsi | |
hihope-rev2.dtsi | |
hihope-rev4.dtsi | |
hihope-rzg2-ex-aistarvision-mipi-adapter-2.1.dtsi | |
hihope-rzg2-ex-aistarvision-mipi-adapter-2.4.dtsi | |
hihope-rzg2-ex.dtsi | |
hihope-rzg2-ex-lvds.dtsi | |
r8a774e1-hihope-rzg2h.dts | |
r8a774e1-hihope-rzg2h-ex.dts | |
r8a774e1-hihope-rzg2h-ex-idk-1110wr.dts | |
rzg2-advantech-idk-1110wr-panel.dtsi | |
r8a774e1-hihope-rzg2h-ex-mipi-2.1.dts | |
r8a774e1-hihope-rzg2h-ex-mipi-2.4.dts |
RZ/G2N HiHope | |
File | Description |
---|---|
r8a774b1.dtsi | RZ/G2N Device Tree containing all peripherals |
r8a774b1-hihope-rzg2n.dts | |
r8a774b1-hihope-rzg2n-ex.dts | |
r8a774b1-hihope-rzg2n-ex-idk-1110wr.dts | |
r8a774b1-hihope-rzg2n-ex-mipi-2.1.dts | |
r8a774b1-hihope-rzg2n-ex-mipi-2.4.dts | |
r8a774b1-hihope-rzg2n-rev2.dts | |
r8a774b1-hihope-rzg2n-rev2-ex.dts | |
r8a774b1-hihope-rzg2n-rev2-ex-idk-1110wr.dts | |
rzg2-advantech-idk-1110wr-panel.dtsi | |
r8a774b1-hihope-rzg2n-rev2-ex-mipi-2.1.dts | |
r8a774b1-hihope-rzg2n-rev2-ex-mipi-2.4.dts |
RZ/G2M HiHope | |
File | Description |
---|---|
r8a774a1.dtsi | RZ/G2M Device Tree containing all peripherals |
r8a774a1-hihope-rzg2m.dts | |
r8a774a1-hihope-rzg2m-ex.dts | |
r8a774a1-hihope-rzg2m-ex-idk-1110wr.dts | |
rzg2-advantech-idk-1110wr-panel.dtsi | |
r8a774a1-hihope-rzg2m-ex-mipi-2.1.dts | |
r8a774a1-hihope-rzg2m-ex-mipi-2.4.dts | |
r8a774a1-hihope-rzg2m-rev2.dts | |
r8a774a1-hihope-rzg2m-rev2-ex.dts | |
r8a774a1-hihope-rzg2m-rev2-ex-idk-1110wr.dts | |
r8a774a1-hihope-rzg2m-rev2-ex-mipi-2.1.dts | |
r8a774a1-hihope-rzg2m-rev2-ex-mipi-2.4.dts | |
r8a774a3.dtsi | |
r8a774a3-hihope-rzg2m.dts | |
r8a774a3-hihope-rzg2m-ex.dts | |
r8a774a3-hihope-rzg2m-ex-idk-1110wr.dts | |
rzg2-advantech-idk-1110wr-panel.dtsi | |
r8a774a3-hihope-rzg2m-ex-mipi-2.1.dts | |
r8a774a3-hihope-rzg2m-ex-mipi-2.4.dts |
RZ/G2E EK874 | |
File | Description |
---|---|
r8a774c0.dtsi | RZ/G2E Device Tree containing all peripherals |
r8a774c0-cat874.dts | |
r8a774c0-cat874-revc.dts | |
r8a774c0-ek874.dts | |
r8a774c0-ek874-idk-2121wr.dts | |
r8a774c0-ek874-mipi-2.1.dts | |
r8a774c0-ek874-mipi-2.4.dts | |
r8a774c0-ek874-revc.dts | |
r8a774c0-ek874-revc-idk-2121wr.dts | |
rzg2-advantech-idk-1110wr-panel.dtsi | |
r8a774c0-ek874-revc-mipi-2.1.dts | |
r8a774c0-ek874-revc-mipi-2.4.dts | |
r8a774c0-es10-cat874.dts | |
r8a774c0-es10.dtsi | |
r8a774c0-es10-ek874.dts | |
r8a774c0-es10-ek874-idk-2121wr.dts | |
r8a774c0-es10-ek874-mipi-2.1.dts | |
r8a774c0-es10-ek874-mipi-2.4.dts | |
cat874-common.dtsi | |
cat875.dtsi |
RZ/G2L SMARC | |
File | Description |
---|---|
r9a07g044.dtsi | RZ/G2L family SoC common parts |
r9a07g044l.dtsi | Specific to RZ/G2L (R9A07G044L) SoC |
r9a07g044l1.dtsi | Specific to RZ/G2L (R9A07G044L single cortex A55) SoC |
r9a07g044l2.dtsi | Specific to RZ/G2L (R9A07G044L dual cortex A55) SoC |
rz-smarc-common.dtsi | |
rzg2l-smarc.dtsi | |
rzg2l-smarc-pinfunction.dtsi | |
rzg2l-smarc-som.dtsi | |
r9a07g044l2-smarc.dts |
RZ/G2LC SMARC | |
File | Description |
---|---|
r9a07g044c1.dtsi | RZ/G2LC Device Tree containing all peripherals |
r9a07g044c2.dtsi | RZ/G2LC Device Tree containing all peripherals |
r9a07g044c2-smarc.dts | |
rzg2lc-smarc.dtsi | |
rzg2lc-smarc-pinfunction.dtsi | |
rzg2lc-smarc-som.dtsi |
RZ/G2UL SMARC | |
File | Description |
---|---|
rzg2ul-smarc.dtsi | |
r9a07g043.dtsi | RZ/G2UL Device Tree containing all peripherals |
r9a07g043u11.dtsi | |
r9a07g043u11-smarc.dts | |
r9a07g043u12.dtsi |
RZ/V2L SMARC | |
File | Description |
---|---|
r9a07g054.dtsi | RZ/V2L Device Tree containing all peripherals |
r9a07g054l1.dtsi | |
r9a07g054l2-dev.dts | |
r9a07g054l2.dtsi | |
r9a07g054l2-smarc.dts |
Internal Renesas boards
- r9a07g044l2-dev.dts
- rzg2l-smarc-dev.dtsi
Device Tree Syntax
Top Level (root node)
Compatible for the SoC
- The .dtsi file for each SoC will have a "compatible" string to specify that SoC it is. If you decide to make your own top level compatible, make sure you include the original SoC string. The reason is that some drivers (the VSP driver for example) look for that SoC string to know what SoC they are running on. If it is missing, it will not load or run correctly.
Here is a correct example of a .dts file for a RZ/G2L board. Notice how "renesas,r9a07g044" is at the end of the line.
/ { model = "My Really Cool RZ/G2L Board"; compatible = "my-rzg2l-board" , "renesas,r9a07g044"; chosen { bootargs = "ignore_loglevel rw root=/dev/mmc0blk1"; stdout-path = "serial0:115200n8"; }; };
Display
Audio
Linux Drivers
- RZ/G2H, G2M, G2N, G2E: rz_linux-cip/sound/soc/sh/rcar/*.c
- RZ/G2L, G2LC, G2UL, V2L: rz_linux-cip/sound/soc/sh/rz-ssi.c
Device Tree Examples
Example of MAX9867 codec with MAX98390 Amplifier for RZ/G2L |
Here is an example of a MAX9867 on SSI channel 3, using I2C-3. MAX98390 Amplifier on I2C-2. This is for the Linux-5.10 kernel. For the older Linux-4.19 kernel, there are some differences. Pin Setup &pinctrl { /* MAX98390 Amplifier */ i2c2_pins: i2c2 { pinmux = <RZG2L_PORT_PINMUX(42, 3, 1)>, /* SDA */ <RZG2L_PORT_PINMUX(42, 4, 1)>; /* SCL */ }; /* MAX9867 Codec */ i2c3_pins: i2c3 { pinmux = <RZG2L_PORT_PINMUX(18, 0, 3)>, /* SDA */ <RZG2L_PORT_PINMUX(18, 1, 3)>; /* SCL */ }; ssi3_pins: ssi3 { pinmux = <RZG2L_PORT_PINMUX(31, 0, 5)>, /* BCK */ <RZG2L_PORT_PINMUX(31, 1, 5)>, /* RCK */ <RZG2L_PORT_PINMUX(32, 0, 5)>, /* TXD */ <RZG2L_PORT_PINMUX(32, 1, 5)>; /* RXD */ }; }; Enable SSI channel &ssi3 { pinctrl-0 = <&ssi3_pins>; pinctrl-names = "default"; #sound-dai-cells = <1>; status = "okay"; }; Create a node for the MAX9867 my_snd: sound { compatible = "simple-audio-card"; simple-audio-card,widgets = "Speaker", "Ext Spk"; simple-audio-card,routing = "Ext Spk", "BE_OUT"; "Ext Spk", "LOUT", "Ext Spk", "ROUT"; /* MAX98390 Amplifier */ simple-audio-card,dai-link@0{ format = "i2s"; bitclock-master = <&cpu_dai3>; frame-master = <&cpu_dai3>; mclk-fs = <256>; cpu_dai3: cpu { sound-dai = <&ssi3>; }; codec_dai3: codec { sound-dai = <&max98390>; clocks = <&mclk>; }; }; /* MAX9867 Codec */ simple-audio-card,dai-link@1{ format = "i2s"; bitclock-master = <&cpu_dai0>; frame-master = <&cpu_dai0>; mclk-fs = <256>; cpu_dai0: cpu { sound-dai = <&ssi0>; }; codec_dai0: codec { sound-dai = <&max9867>; clocks = <&mclk>; }; }; };
&i2c2 { pinctrl-0 = <&i2c2_pins>; pinctrl-names = "default"; status = "okay"; clock-frequency = <400000>; /* MAX98390 Amplifier */ max98390: codec@3d { status = "okay"; compatible = "maxim,max98390"; #sound-dai-cells = <0>; reg = <0x3d>; }; }; &i2c3 { pinctrl-0 = <&i2c3_pins>; pinctrl-names = "default"; status = "okay"; clock-frequency = <400000>; /* MAX9867 Codec */ max9867: codec@18 { status = "okay"; compatible = "maxim,max9867"; #sound-dai-cells = <0>; reg = <0x18>; }; };
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Camera
Ethernet
USB
SD Card
eMMC
I2C
SPI
QSPI Flash
UART
CAN
ADC
Watchdog Timer(WDT)
Linux Drivers
- RZ/G2H, G2M, G2N, G2E: rz_linux-cip/drivers/watchdog/renesas_wdt.c
- RZ/G2L, G2LC, G2UL, V2L: rz_linux-cip/drivers/watchdog/rzg2l_wdt.c
Device Tree Examples
- (see device tree for evaluation board)
Testing
- When rebooting the system, the watchdog timer is used. Simply type the command line "reboot" in the console.
- To test a watch dog timeout/reboot, enter this command in the console "cat >> /dev/watchdog", then press ENTER again, then wait 1 minutes, and the board should reboot.