threeeye
bc1d038eac
Squashed backup commit (no shallow-clone history issues) of xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2 branch, upstream commit 9eece662e) plus all fixes applied to get everpal_defconfig building clean against a modern (GCC 15.2.0) toolchain -- see the previous commit message on the lineage-23.2 branch (also in this repo history is not available here since this is a squashed snapshot; full incremental history lives in the local DL380 checkout and the upstream GitHub remote). Upstream: https://github.com/xiaomi-mt6833-dev/kernel_xiaomi_mt6833 (lineage-23.2)
45 lines
1.7 KiB
Plaintext
45 lines
1.7 KiB
Plaintext
DT bindings for Renesas R-Mobile and SH-Mobile memory controllers
|
|
=================================================================
|
|
|
|
Renesas R-Mobile and SH-Mobile SoCs contain one or more memory controllers.
|
|
These memory controllers differ from one SoC variant to another, and are called
|
|
by different names ("DDR Bus Controller (DBSC)", "DDR3 Bus State Controller
|
|
(DBSC3)", "SDRAM Bus State Controller (SBSC)").
|
|
|
|
Currently memory controller device nodes are used only to reference PM
|
|
domains, and prevent these PM domains from being powered down, which would
|
|
crash the system.
|
|
|
|
As there exist no actual drivers for these controllers yet, these bindings
|
|
should be considered EXPERIMENTAL for now.
|
|
|
|
Required properties:
|
|
- compatible: Must be one of the following SoC-specific values:
|
|
- "renesas,dbsc-r8a73a4" (R-Mobile APE6)
|
|
- "renesas,dbsc3-r8a7740" (R-Mobile A1)
|
|
- "renesas,sbsc-sh73a0" (SH-Mobile AG5)
|
|
- reg: Must contain the base address and length of the memory controller's
|
|
registers.
|
|
|
|
Optional properties:
|
|
- interrupts: Must contain a list of interrupt specifiers for memory
|
|
controller interrupts, if available.
|
|
- interrupt-names: Must contain a list of interrupt names corresponding to
|
|
the interrupts in the interrupts property, if available.
|
|
Valid interrupt names are:
|
|
- "sec" (secure interrupt)
|
|
- "temp" (normal (temperature) interrupt)
|
|
- power-domains: Must contain a reference to the PM domain that the memory
|
|
controller belongs to, if available.
|
|
|
|
Example:
|
|
|
|
sbsc1: memory-controller@fe400000 {
|
|
compatible = "renesas,sbsc-sh73a0";
|
|
reg = <0xfe400000 0x400>;
|
|
interrupts = <0 35 IRQ_TYPE_LEVEL_HIGH>,
|
|
<0 36 IRQ_TYPE_LEVEL_HIGH>;
|
|
interrupt-names = "sec", "temp";
|
|
power-domains = <&pd_a4bc0>;
|
|
};
|