From mboxrd@z Thu Jan 1 00:00:00 1970 From: Oleksij Rempel Subject: [PATCH v2 2/4] dt-bindings: mailbox: provide imx-mailbox documentation Date: Fri, 15 Jun 2018 11:51:05 +0200 Message-ID: <20180615095107.24610-3-o.rempel@pengutronix.de> References: <20180615095107.24610-1-o.rempel@pengutronix.de> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: <20180615095107.24610-1-o.rempel@pengutronix.de> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=m.gmane.org@lists.infradead.org To: Shawn Guo , Fabio Estevam , Rob Herring , Mark Rutland , "A.s. Dong" Cc: devicetree@vger.kernel.org, Oleksij Rempel , dl-linux-imx , kernel@pengutronix.de, linux-clk@vger.kernel.org, linux-arm-kernel@lists.infradead.org List-Id: devicetree@vger.kernel.org Signed-off-by: Oleksij Rempel --- .../bindings/mailbox/imx-mailbox.txt | 35 +++++++++++++++++++ 1 file changed, 35 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/imx-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/imx-mailbox.txt b/Documentation/devicetree/bindings/mailbox/imx-mailbox.txt new file mode 100644 index 000000000000..1577b86f1206 --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/imx-mailbox.txt @@ -0,0 +1,35 @@ +i.MX Messaging Unit +=================== + +The i.MX Messaging Unit (MU) contains two register sets: "A" and "B". In most +cases they are accessible from all Processor Units. On one hand, at least for +mailbox functionality, it makes no difference which application or processor is +using which set of the MU. On other hand, the register sets for each of the MU +parts are not identical. + +Required properties: +- compatible : Shell be one of: + "fsl,imx7s-mu-a" and "fsl,imx7s-mu-b" for i.MX7S or i.MX7D +- reg : physical base address of the mailbox and length of + memory mapped region. +- #mbox-cells: Common mailbox binding property to identify the number + of cells required for the mailbox specifier. Should be 1. +- interrupts : The interrupt number +- clocks : phandle to the input clock. + +Example: + mu0a: mailbox@30aa0000 { + compatible = "fsl,imx7s-mu-a"; + reg = <0x30aa0000 0x28>; + interrupts = ; + clocks = <&clks IMX7D_MU_ROOT_CLK>; + #mbox-cells = <1>; + }; + + mu0b: mailbox@30ab0000 { + compatible = "fsl,imx7s-mu-b"; + reg = <0x30ab0000 0x28>; + interrupts = ; + clocks = <&clks IMX7D_MU_ROOT_CLK>; + #mbox-cells = <1>; + }; -- 2.17.1