Add DT bindings for the Renesas R-Car Reset Controller (R-Car Gen1
RESET/WDT and R-Car Gen2/Gen3 RST).
As the features provided by the hardware module differ a lot across the
various SoC families and members, only SoC-specific compatible values
are defined.
For now we use the RST only for providing access to the state of the
mode pins.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Acked-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
---
v3:
- Clarify current usage,
- Use "renesas,<soctype>-rst" instead of "renesas,rst-<soctype>",
- Drop "syscon" compatible value,
- Add R-Car M3-W,
- Add R-Car Gen1,
v2:
- Add Acked-by.
---
.../devicetree/bindings/reset/renesas,rst.txt | 35 ++++++++++++++++++++++
1 file changed, 35 insertions(+)
create mode 100644 Documentation/devicetree/bindings/reset/renesas,rst.txt
diff --git a/Documentation/devicetree/bindings/reset/renesas,rst.txt b/Documentation/devicetree/bindings/reset/renesas,rst.txt
new file mode 100644
index 0000000000000000..488c72e1ee849cd3
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/renesas,rst.txt
@@ -0,0 +1,35 @@
+DT bindings for the Renesas R-Car Reset Controller
+
+The R-Car Reset Controller provides reset control, and implements the following
+functions:
+ - Latching of the levels on mode pins when PRESET# is negated,
+ - Mode monitoring register,
+ - Reset control of peripheral devices (on R-Car Gen1),
+ - Watchdog timer (on R-Car Gen1).
+ - Register-based reset control and boot address registers for the various CPU
+ cores (on R-Car Gen2/Gen3),
+
+
+Required properties:
+ - compatible: Should be
+ - "renesas,<soctype>-reset-wdt" for R-Car Gen1,
+ - "renesas,<soctype>-rst" for R-Car Gen2/Gen3.
+ Examples with soctypes are:
+ - "renesas,r8a7778-reset-wdt" (R-Car M1A)
+ - "renesas,r8a7779-reset-wdt" (R-Car H1)
+ - "renesas,r8a7790-rst" (R-Car H2)
+ - "renesas,r8a7791-rst" (R-Car M2-W)
+ - "renesas,r8a7792-rst" (R-Car V2H
+ - "renesas,r8a7793-rst" (R-Car M2-N)
+ - "renesas,r8a7794-rst" (R-Car E2)
+ - "renesas,r8a7795-rst" (R-Car H3)
+ - "renesas,r8a7796-rst" (R-Car M3-W)
+ - reg: Address start and address range for the device.
+
+
+Example:
+
+ rst: reset-controller@e6160000 {
+ compatible = "renesas,r8a7795-rst";
+ reg = <0 0xe6160000 0 0x0200>;
+ };
--
1.9.1
--
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