linux-kernel - [PATCH v9 2/5] dt-bindings: clock: renesas,r9a06g032-sysctrl: documentation

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Message-Id: <1528973829-25493-3-git-send-email-michel.pollet@bp.renesas.com>
Date:   Thu, 14 Jun 2018 11:56:31 +0100
From:   Michel Pollet <michel.pollet@...renesas.com>
To:     linux-renesas-soc@...r.kernel.org,
        Simon Horman <horms@...ge.net.au>
Cc:     phil.edworthy@...esas.com,
        Michel Pollet <buserror+upstream@...il.com>,
        Michel Pollet <michel.pollet@...renesas.com>,
        Michael Turquette <mturquette@...libre.com>,
        Stephen Boyd <sboyd@...nel.org>,
        Rob Herring <robh+dt@...nel.org>,
        Mark Rutland <mark.rutland@....com>,
        Geert Uytterhoeven <geert+renesas@...der.be>,
        linux-clk@...r.kernel.org, devicetree@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH v9 2/5] dt-bindings: clock: renesas,r9a06g032-sysctrl: documentation

The Renesas R9A06G032 SYSCTRL node description.

Signed-off-by: Michel Pollet <michel.pollet@...renesas.com>
---
 .../bindings/clock/renesas,r9a06g032-sysctrl.txt   | 44 ++++++++++++++++++++++
 1 file changed, 44 insertions(+)
 create mode 100644 Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt

diff --git a/Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt b/Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt
new file mode 100644
index 0000000..f6cb5e3
--- /dev/null
+++ b/Documentation/devicetree/bindings/clock/renesas,r9a06g032-sysctrl.txt
@@ -0,0 +1,44 @@
+* Renesas R9A06G032 SYSCTRL
+
+Required Properties:
+
+  - compatible: Must be:
+    - "renesas,r9a06g032-sysctrl"
+  - reg: Base address and length of the SYSCTRL IO block.
+  - #clock-cells: Must be 1
+  - clocks: References to the parent clocks:
+	- external 40mhz crystal.
+	- external (optional) 32.768khz
+	- external (optional) jtag input
+	- external (optional) RGMII_REFCLK
+  - clock-names: Must be:
+        clock-names = "mclk", "rtc", "jtag", "rgmii_ref_ext";
+
+Examples
+--------
+
+  - SYSCTRL node:
+
+	sysctrl: system-controller@...0c000 {
+		compatible = "renesas,r9a06g032-sysctrl";
+		reg = <0x4000c000 0x1000>;
+		status = "okay";
+		#clock-cells = <1>;
+
+		clocks = <&ext_mclk>, <&ext_rtc_clk>,
+				<&ext_jtag_clk>, <&ext_rgmii_ref>;
+		clock-names = "mclk", "rtc", "jtag", "rgmii_ref_ext";
+	};
+
+  - Other nodes can use the clocks provided by SYSCTRL as in:
+
+	#include <dt-bindings/clock/r9a06g032-sysctrl.h>
+	uart0: serial@...60000 {
+		compatible = "snps,dw-apb-uart";
+		reg = <0x40060000 0x400>;
+		interrupts = <GIC_SPI 6 IRQ_TYPE_LEVEL_HIGH>;
+		reg-shift = <2>;
+		reg-io-width = <4>;
+		clocks = <&sysctrl R9A06G032_CLK_UART0>;
+		clock-names = "baudclk";
+	};
-- 
2.7.4