From patchwork Tue Sep 6 19:01:23 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nishanth Menon X-Patchwork-Id: 9317829 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 D3312601C0 for ; Tue, 6 Sep 2016 19:04:27 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C7D4C28E92 for ; Tue, 6 Sep 2016 19:04:27 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BCC6A28E95; Tue, 6 Sep 2016 19:04:27 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 466FC28E92 for ; Tue, 6 Sep 2016 19:04:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964876AbcIFTCj (ORCPT ); Tue, 6 Sep 2016 15:02:39 -0400 Received: from bear.ext.ti.com ([198.47.19.11]:53073 "EHLO bear.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S935399AbcIFTCh (ORCPT ); Tue, 6 Sep 2016 15:02:37 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by bear.ext.ti.com (8.13.7/8.13.7) with ESMTP id u86J1ZBV020404; Tue, 6 Sep 2016 14:01:36 -0500 Received: from DLEE70.ent.ti.com (dlemailx.itg.ti.com [157.170.170.113]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id u86J1ZjV025184; Tue, 6 Sep 2016 14:01:35 -0500 Received: from dflp32.itg.ti.com (10.64.6.15) by DLEE70.ent.ti.com (157.170.170.113) with Microsoft SMTP Server id 14.3.294.0; Tue, 6 Sep 2016 14:01:35 -0500 Received: from localhost (ileax41-snat.itg.ti.com [10.172.224.153]) by dflp32.itg.ti.com (8.14.3/8.13.8) with ESMTP id u86J1YfT014657; Tue, 6 Sep 2016 14:01:35 -0500 From: Nishanth Menon To: Rob Herring , Tero Kristo , Santosh Shilimkar CC: Russ Dill , Dave Gerlach , Lokesh Vutla , Peter Ujfalusi , "Andrew F . Davis" , Russell King , Sudeep Holla , , , , , Nishanth Menon Subject: [PATCH V3 1/5] Documentation: Add support for TI System Control Interface (TI-SCI) protocol Date: Tue, 6 Sep 2016 14:01:23 -0500 Message-ID: <20160906190127.23522-2-nm@ti.com> X-Mailer: git-send-email 2.9.1.200.gb1ec08f In-Reply-To: <20160906190127.23522-1-nm@ti.com> References: <20160906190127.23522-1-nm@ti.com> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.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 --- Changes in V3: - All dependent nodes like PD/Clk are children of TISCI node - minor formatting updates V2: https://patchwork.kernel.org/patch/9305413/ V1: https://patchwork.kernel.org/patch/9291343/ .../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 20bb1d00098c..ce7306897ae0 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -11564,6 +11564,14 @@ 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