Dtsi files syntax

Where can I find Nvidia documentation on Values used in dtsi files:
example: “exclusion- info = <3>”
What does <3> mean why not <12> ? What documentation describes this ?
Thank you in advance for the help there!

Example is from the SPI app for SPE. Jetson Sensor Processing Engine (SPE) Developer Guide: SPI application (app/spi-app.c)):
Modify firewall setting in ${L4T}/bootloader/tegra234-mb2-bct-scr-p3701-0000-override.dts to allow SPE to read/write to the SPI2 register.
+++ b/bootloader/tegra234-mb2-bct-scr-p3701-0000-override.dts
@@ -24,6 +24,11 @@
value = <0x18000606>;

 +          reg@2135 { /* CLK_RST_CONTROLLER_AON_SCR_SPI2_0 */
 +              exclusion-info = <3>;
 +              value = <0x30001410>;
 +          };
            reg@5114 { /* CBB_CENTRAL_CBB_FIREWALL_PWM5_BLF, READ_CTL */

Hi philoppe12,

It is a value with bit field.
Please refer to the following instruction for exclusion-info of security configuration.
Security Configuration — Jetson Linux Developer Guide documentation (nvidia.com)

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