From patchwork Thu Oct 27 21:05:34 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Markus Mayer X-Patchwork-Id: 9400453 X-Patchwork-Delegate: rjw@sisk.pl 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 E1B3660231 for ; Thu, 27 Oct 2016 21:14:28 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id C6D7E2A31A for ; Thu, 27 Oct 2016 21:14:28 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id BBA1E2A3BD; Thu, 27 Oct 2016 21:14:28 +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=ham 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 A2E082A31A for ; Thu, 27 Oct 2016 21:14:27 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S964947AbcJ0VO0 (ORCPT ); Thu, 27 Oct 2016 17:14:26 -0400 Received: from smtp-out-so.shaw.ca ([64.59.136.139]:42901 "EHLO smtp-out-so.shaw.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S964799AbcJ0VOZ (ORCPT ); Thu, 27 Oct 2016 17:14:25 -0400 X-Greylist: delayed 488 seconds by postgrey-1.27 at vger.kernel.org; Thu, 27 Oct 2016 17:14:24 EDT Received: from triton.mmayer.net ([70.71.160.251]) by shaw.ca with SMTP id zrsKbAev0eeHNzrsMb44UU; Thu, 27 Oct 2016 15:06:15 -0600 X-Authority-Analysis: v=2.2 cv=abURpVgt c=1 sm=1 tr=0 a=6xzog4CasRozao6qlzTIAw==:117 a=6xzog4CasRozao6qlzTIAw==:17 a=IkcTkHD0fZMA:10 a=CH0kA5CcgfcA:10 a=Q-fNiiVtAAAA:8 a=KKAkSRfTAAAA:8 a=VwQbUJbxAAAA:8 a=pGLkceISAAAA:8 a=0X71_087iJpkeqa4yWUA:9 a=1vf2K5kTzwIy0OHD:21 a=V01s3ICT4SL-I70F:21 a=QEXdDO2ut3YA:10 a=Fp8MccfUoT0GBdDC_Lng:22 a=cvBusfyB2V15izCimMoJ:22 a=AjGcO6oz07-iQ99wixmX:22 a=6kGIvZw6iX1k4Y-7sg4_:22 Received: by triton.mmayer.net (Postfix, from userid 501) id BB829287ACFA; Thu, 27 Oct 2016 14:06:12 -0700 (PDT) From: Markus Mayer To: Rob Herring , Viresh Kumar , "Rafael J . Wysocki" Cc: Broadcom Kernel List , Device Tree List , Power Management List , Linux Kernel Mailing List , Markus Mayer Subject: [PATCH v5 1/3] dt: cpufreq: brcm: New binding document for brcmstb-avs-cpufreq Date: Thu, 27 Oct 2016 14:05:34 -0700 Message-Id: <20161027210536.98988-2-code@mmayer.net> X-Mailer: git-send-email 2.9.2 In-Reply-To: <20161027210536.98988-1-code@mmayer.net> References: <20161027210536.98988-1-code@mmayer.net> MIME-Version: 1.0 X-CMAE-Envelope: MS4wfGILX4OPVuhGtSCmEWVTFAs6UeMgQydsXfqkqRrnDguCY68xt0cgaid9sE7NGf8yBK1odmezr74hiz40xeF6XnwcizS23F3ozT0A7bAPHAH8YoVgLIOP JmcBiydhq/tz1AXFjGWAHQhPKmuT1am5/mgyN6+qfTN3PZilGBNfBREKCdEtK9wz/QGMKra/o8MxbYSs3weqmHtkI8TtzzpU0N7h5cx5jSB/kMo/ZmtAMQPz Kysv3lVRXLQoisKbVZ0a+5cAbB34hcCuakowQzY3KGeir7h7Yw8oNohPB07yFwj7XeRA9NRmgryeyMtbwpM2GKs3YwJuKn8UnLeStSH5I2sR8yVTTuTqdiJl CHMYIZPDDq/4ODOIJKX9qOHxj0qrXIWVKGs9H9NM+h5AvBRmOxPpn7DW0PqIyOD+7rC5FHvfa+LxgEl8CkhPcyE8RSWTQA== 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 From: Markus Mayer Add the binding document for the new brcmstb-avs-cpufreq driver. Signed-off-by: Markus Mayer Acked-by: Viresh Kumar Acked-by: Rob Herring --- .../bindings/cpufreq/brcm,stb-avs-cpu-freq.txt | 78 ++++++++++++++++++++++ MAINTAINERS | 7 ++ 2 files changed, 85 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt diff --git a/Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt b/Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt new file mode 100644 index 0000000..af23857 --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt @@ -0,0 +1,78 @@ +Broadcom AVS mail box and interrupt register bindings +===================================================== + +A total of three DT nodes are required. One node (brcm,avs-cpu-data-mem) +references the mailbox register used to communicate with the AVS CPU[1]. The +second node (brcm,avs-cpu-l2-intr) is required to trigger an interrupt on +the AVS CPU. The interrupt tells the AVS CPU that it needs to process a +command sent to it by a driver. Interrupting the AVS CPU is mandatory for +commands to be processed. + +The interface also requires a reference to the AVS host interrupt controller, +so a driver can react to interrupts generated by the AVS CPU whenever a command +has been processed. See [2] for more information on the brcm,l2-intc node. + +[1] The AVS CPU is an independent co-processor that runs proprietary +firmware. On some SoCs, this firmware supports DFS and DVFS in addition to +Adaptive Voltage Scaling. + +[2] Documentation/devicetree/bindings/interrupt-controller/brcm,l2-intc.txt + + +Node brcm,avs-cpu-data-mem +-------------------------- + +Required properties: +- compatible: must include: brcm,avs-cpu-data-mem and + should include: one of brcm,bcm7271-avs-cpu-data-mem or + brcm,bcm7268-avs-cpu-data-mem +- reg: Specifies base physical address and size of the registers. +- interrupts: The interrupt that the AVS CPU will use to interrupt the host + when a command completed. +- interrupt-parent: The interrupt controller the above interrupt is routed + through. +- interrupt-names: The name of the interrupt used to interrupt the host. + +Optional properties: +- None + +Node brcm,avs-cpu-l2-intr +------------------------- + +Required properties: +- compatible: must include: brcm,avs-cpu-l2-intr and + should include: one of brcm,bcm7271-avs-cpu-l2-intr or + brcm,bcm7268-avs-cpu-l2-intr +- reg: Specifies base physical address and size of the registers. + +Optional properties: +- None + + +Example +======= + + avs_host_l2_intc: interrupt-controller@f04d1200 { + #interrupt-cells = <1>; + compatible = "brcm,l2-intc"; + interrupt-parent = <&intc>; + reg = <0xf04d1200 0x48>; + interrupt-controller; + interrupts = <0x0 0x19 0x0>; + interrupt-names = "avs"; + }; + + avs-cpu-data-mem@f04c4000 { + compatible = "brcm,bcm7271-avs-cpu-data-mem", + "brcm,avs-cpu-data-mem"; + reg = <0xf04c4000 0x60>; + interrupts = <0x1a>; + interrupt-parent = <&avs_host_l2_intc>; + interrupt-names = "sw_intr"; + }; + + avs-cpu-l2-intr@f04d1100 { + compatible = "brcm,bcm7271-avs-cpu-l2-intr", + "brcm,avs-cpu-l2-intr"; + reg = <0xf04d1100 0x10>; + }; diff --git a/MAINTAINERS b/MAINTAINERS index 1cd38a7..9379aca 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -2738,6 +2738,13 @@ L: bcm-kernel-feedback-list@broadcom.com S: Maintained F: drivers/mtd/nand/brcmnand/ +BROADCOM STB AVS CPUFREQ DRIVER +M: Markus Mayer +M: bcm-kernel-feedback-list@broadcom.com +L: linux-pm@vger.kernel.org +S: Maintained +F: Documentation/devicetree/bindings/cpufreq/brcm,stb-avs-cpu-freq.txt + BROADCOM SPECIFIC AMBA DRIVER (BCMA) M: Rafał Miłecki L: linux-wireless@vger.kernel.org