From mboxrd@z Thu Jan  1 00:00:00 1970
From: Geert Uytterhoeven <geert+renesas@glider.be>
Subject: [PATCH/RFC v3 01/22] reset: Add renesas,rst DT bindings
Date: Wed,  1 Jun 2016 21:20:59 +0200
Message-ID: <1464808880-343-2-git-send-email-geert+renesas@glider.be>
References: <1464808880-343-1-git-send-email-geert+renesas@glider.be>
Return-path: <linux-renesas-soc-owner@vger.kernel.org>
In-Reply-To: <1464808880-343-1-git-send-email-geert+renesas@glider.be>
Sender: linux-renesas-soc-owner@vger.kernel.org
To: Simon Horman <horms@verge.net.au>, Magnus Damm <magnus.damm@gmail.com>, Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>, Philipp Zabel <p.zabel@pengutronix.de>, Michael Turquette <mturquette@baylibre.com>, Stephen Boyd <sboyd@codeaurora.org>, Dirk Behme <dirk.behme@de.bosch.com>
Cc: linux-renesas-soc@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, Geert Uytterhoeven <geert+renesas@glider.be>
List-Id: devicetree@vger.kernel.org

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 <damm+renesas@opensource.se>
---
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