From patchwork Tue Oct 18 23:08:33 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 9383281 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 2B2AD600CA for ; Tue, 18 Oct 2016 23:11:33 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 147D729883 for ; Tue, 18 Oct 2016 23:11:33 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 091B729891; Tue, 18 Oct 2016 23:11:33 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id 621B629883 for ; Tue, 18 Oct 2016 23:11:30 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.85_2 #1 (Red Hat Linux)) id 1bwdW5-0003EI-Px; Tue, 18 Oct 2016 23:09:53 +0000 Received: from devils.ext.ti.com ([198.47.26.153]) by bombadil.infradead.org with esmtps (Exim 4.85_2 #1 (Red Hat Linux)) id 1bwdVr-00039z-2X for linux-arm-kernel@lists.infradead.org; Tue, 18 Oct 2016 23:09:40 +0000 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by devils.ext.ti.com (8.13.7/8.13.7) with ESMTP id u9IN90MQ021162; Tue, 18 Oct 2016 18:09:00 -0500 Received: from DFLE73.ent.ti.com (dfle73.ent.ti.com [128.247.5.110]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id u9IN90cv017850; Tue, 18 Oct 2016 18:09:00 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DFLE73.ent.ti.com (128.247.5.110) with Microsoft SMTP Server id 14.3.294.0; Tue, 18 Oct 2016 18:09:00 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id u9IN90Fu031090; Tue, 18 Oct 2016 18:09:00 -0500 From: Nishanth Menon To: Tero Kristo , Santosh Shilimkar Subject: [PATCH V4 1/5] Documentation: Add support for TI System Control Interface (TI-SCI) protocol Date: Tue, 18 Oct 2016 18:08:33 -0500 Message-ID: <20161018230837.6515-2-nm@ti.com> X-Mailer: git-send-email 2.10.0 In-Reply-To: <20161018230837.6515-1-nm@ti.com> References: <20161018230837.6515-1-nm@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20161018_160939_231488_E48BC41A X-CRM114-Status: GOOD ( 12.67 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Nishanth Menon , devicetree@vger.kernel.org, Dave Gerlach , Lokesh Vutla , Kevin Hilman , linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, Andrew Davis , Russell King , Russ Dill , Sudeep Holla , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org X-Virus-Scanned: ClamAV using ClamSMTP Texas Instrument's System Control Interface (TI-SCI) Message Protocol is used in Texas Instrument's System on Chip (SoC) such as those in newer SoCs in the keystone processor family starting with K2G. This message protocol is used to communicate between various compute or processing entities (such as ARM, DSP etc.) with a central system controller entity. TI-SCI message protocol provides support for management of various hardware entities within the SoC. The message protocol can be found here: http://processors.wiki.ti.com/index.php/TISCI Signed-off-by: Nishanth Menon Acked-by: Rob Herring --- V4: No change, just picked up Rob's Ack from v3. V3: https://patchwork.kernel.org/patch/9317825/ .../devicetree/bindings/arm/keystone/ti,sci.txt | 81 ++++++++++++++++++++++ MAINTAINERS | 8 +++ 2 files changed, 89 insertions(+) create mode 100644 Documentation/devicetree/bindings/arm/keystone/ti,sci.txt diff --git a/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt b/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt new file mode 100644 index 000000000000..31f5f9a104cc --- /dev/null +++ b/Documentation/devicetree/bindings/arm/keystone/ti,sci.txt @@ -0,0 +1,81 @@ +Texas Instruments System Control Interface (TI-SCI) Message Protocol +-------------------------------------------------------------------- + +Texas Instrument's processors including those belonging to Keystone generation +of processors have separate hardware entity which is now responsible for the +management of the System on Chip (SoC) system. These include various system +level functions as well. + +An example of such an SoC is K2G, which contains the system control hardware +block called Power Management Micro Controller (PMMC). This hardware block is +initialized early into boot process and provides services to Operating Systems +on multiple processors including ones running Linux. + +See http://processors.wiki.ti.com/index.php/TISCI for protocol definition. + +TI-SCI controller Device Node: +============================= + +The TI-SCI node describes the Texas Instrument's System Controller entity node. +This parent node may optionally have additional children nodes which describe +specific functionality such as clocks, power domain, reset or additional +functionality as may be required for the SoC. This hierarchy also describes the +relationship between the TI-SCI parent node to the child node. + +Required properties: +------------------- +- compatible: should be "ti,k2g-sci" +- mbox-names: + "rx" - Mailbox corresponding to receive path + "tx" - Mailbox corresponding to transmit path + +- mboxes: Mailboxes corresponding to the mbox-names. Each value of the mboxes + property should contain a phandle to the mailbox controller device + node and an args specifier that will be the phandle to the intended + sub-mailbox child node to be used for communication. + +See Documentation/devicetree/bindings/mailbox/mailbox.txt for more details +about the generic mailbox controller and client driver bindings. Also see +Documentation/devicetree/bindings/mailbox/ti,message-manager.txt for typical +controller that is used to communicate with this System controllers. + +Optional Properties: +------------------- +- reg-names: + debug_messages - Map the Debug message region +- reg: register space corresponding to the debug_messages +- ti,system-reboot-controller: If system reboot can be triggered by SoC reboot + +Example (K2G): +------------- + pmmc: pmmc { + compatible = "ti,k2g-sci"; + mbox-names = "rx", "tx"; + mboxes= <&msgmgr &msgmgr_proxy_pmmc_rx>, + <&msgmgr &msgmgr_proxy_pmmc_tx>; + reg-names = "debug_messages"; + reg = <0x02921800 0x800>; + }; + + +TI-SCI Client Device Node: +========================= + +Client nodes are maintained as children of the relevant TI-SCI device node. + +Example (K2G): +------------- + pmmc: pmmc { + compatible = "ti,k2g-sci"; + ... + + my_clk_node: clk_node { + ... + ... + }; + + my_pd_node: pd_node { + ... + ... + }; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 1cd38a7e0064..2bafadf5747a 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11883,6 +11883,14 @@ S: Maintained F: arch/xtensa/ F: drivers/irqchip/irq-xtensa-* +Texas Instruments' System Control Interface (TISCI) Protocol Driver +M: Nishanth Menon +M: Tero Kristo +M: Santosh Shilimkar +L: linux-arm-kernel@lists.infradead.org +S: Maintained +F: Documentation/devicetree/bindings/arm/keystone/ti,sci.txt + THANKO'S RAREMONO AM/FM/SW RADIO RECEIVER USB DRIVER M: Hans Verkuil L: linux-media@vger.kernel.org