Add DT bindings for the Renesas R-Car Reset Controller (R-Car Gen1
RESET/WDT and R-Car Gen2/Gen3 and RZ/G 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, which is needed by the clock driver.
Signed-off-by: Geert Uytterhoeven <geert+renesas@xxxxxxxxx>
Acked-by: Magnus Damm <damm+renesas@xxxxxxxxxxxxx>
Acked-by: Dirk Behme <dirk.behme@xxxxxxxxxxxx>
Acked-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
v4:
- Add Acked-by,
- Fix comma and period in list,
- Add RZ/G1M and RZ/G1E,
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 | 37 ++++++++++++++++++++++
1 file changed, 37 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..fe5e0f37b3c93579
--- /dev/null
+++ b/Documentation/devicetree/bindings/reset/renesas,rst.txt
@@ -0,0 +1,37 @@
+DT bindings for the Renesas R-Car and RZ/G Reset Controllers
+
+The R-Car and RZ/G Reset Controllers provide reset control, and implement 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 and Gen3, and on RZ/G).
+
+
+Required properties:
+ - compatible: Should be
+ - "renesas,<soctype>-reset-wdt" for R-Car Gen1,
+ - "renesas,<soctype>-rst" for R-Car Gen2 and Gen3, and RZ/G
+ Examples with soctypes are:
+ - "renesas,r8a7743-rst" (RZ/G1M)
+ - "renesas,r8a7745-rst" (RZ/G1E)
+ - "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
