Commit 362922a1 authored by Geert Uytterhoeven's avatar Geert Uytterhoeven
Browse files

reset: Add renesas,rst DT bindings 



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: default avatarGeert Uytterhoeven <geert+renesas@glider.be>
Acked-by: default avatarMagnus Damm <damm+renesas@opensource.se>
Acked-by: default avatarDirk Behme <dirk.behme@de.bosch.com>
Acked-by: default avatarLaurent Pinchart <laurent.pinchart@ideasonboard.com>
Acked-by: default avatarPhilipp Zabel <p.zabel@pengutronix.de>
Acked-by: default avatarRob Herring <robh@kernel.org>
parent 1001354c

Documentation/devicetree/bindings/reset/renesas,rst.txt

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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>;

	};

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