From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754248AbbG0JrF (ORCPT ); Mon, 27 Jul 2015 05:47:05 -0400 Received: from mail-wi0-f180.google.com ([209.85.212.180]:36670 "EHLO mail-wi0-f180.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753552AbbG0Joj (ORCPT ); Mon, 27 Jul 2015 05:44:39 -0400 From: Lee Jones To: linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Cc: kernel@stlinux.com, jassisinghbrar@gmail.com, devicetree@vger.kernel.org, Lee Jones Subject: [PATCH v2 1/6] mailbox: dt: Supply bindings for ST's Mailbox IP Date: Mon, 27 Jul 2015 10:44:27 +0100 Message-Id: <1437990272-23111-2-git-send-email-lee.jones@linaro.org> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1437990272-23111-1-git-send-email-lee.jones@linaro.org> References: <1437990272-23111-1-git-send-email-lee.jones@linaro.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Lee Jones --- .../devicetree/bindings/mailbox/sti-mailbox.txt | 53 ++++++++++++++++++++++ 1 file changed, 53 insertions(+) create mode 100644 Documentation/devicetree/bindings/mailbox/sti-mailbox.txt diff --git a/Documentation/devicetree/bindings/mailbox/sti-mailbox.txt b/Documentation/devicetree/bindings/mailbox/sti-mailbox.txt new file mode 100644 index 0000000..3390e3e --- /dev/null +++ b/Documentation/devicetree/bindings/mailbox/sti-mailbox.txt @@ -0,0 +1,53 @@ +ST Microelectronics Mailbox Driver + +Each ST Mailbox IP currently consists of 4 instances of 32 channels. Messages +are passed between Application and Remote processors using shared memory. + +Controller +---------- + +Required properties: +- compatible : Should be "st,stih407-mailbox" +- reg : Offset and length of the device's register set +- mbox-name : Name of the mailbox +- #mbox-cells: : Must be 3 + <&phandle instance channel direction> + phandle : Label name of controller + instance : Instance number + channel : Channel number + direction : Data flow direction; MBOX_TX or MBOX_RX + +Optional properties +- interrupts : Contains the IRQ line for a Rx mailbox + [NB: The absence of this property denotes Tx only] + +Example: + +mailbox0: mailbox@0 { + compatible = "st,stih407-mailbox"; + reg = <0x8f00000 0x1000>; + interrupts = ; + #mbox-cells = <3>; + mbox-name = "a9"; +}; + +Client +------ + +Required properties: +- compatible : Many (See the client docs) +- reg : Shared (between Application and Remote) memory address +- mboxes : Standard property to specify a Mailbox (See ./mailbox.txt) + Cells must match 'mbox-cells' (See Controller docs above) + +Optional properties +- mbox-names : Name given to channels seen in the 'mboxes' property. + +Example: + +mailbox_test { + compatible = "mailbox_test"; + reg = <0x[shared_memory_address], [shared_memory_size]>; + mboxes = <&mailbox2 0 1 MBOX_TX>, <&mailbox0 2 1 MBOX_RX>; + mbox-names = "tx", "rx"; +}; -- 1.9.1