[PATCH/RFC v3 01/22] reset: Add renesas,rst DT bindings
From: Geert Uytterhoeven <geert+renesas@glider.be>
Date: 2016-06-01 19:20:59
Also in:
linux-renesas-soc
Subsystem:
open firmware and flattened device tree bindings, reset controller framework, the rest · Maintainers:
Rob Herring, Krzysztof Kozlowski, Conor Dooley, Philipp Zabel, Linus Torvalds
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@glider.be> Acked-by: Magnus Damm <redacted> --- 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>; + };
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1.9.1