From patchwork Mon Jul 21 15:38:59 2014 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tuomas Tynkkynen X-Patchwork-Id: 4596591 Return-Path: X-Original-To: patchwork-linux-pm@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9DF0DC0514 for ; Mon, 21 Jul 2014 15:41:26 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id D14D820149 for ; Mon, 21 Jul 2014 15:41:25 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 05F51200DB for ; Mon, 21 Jul 2014 15:41:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933128AbaGUPka (ORCPT ); Mon, 21 Jul 2014 11:40:30 -0400 Received: from hqemgate14.nvidia.com ([216.228.121.143]:11268 "EHLO hqemgate14.nvidia.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933119AbaGUPkZ (ORCPT ); Mon, 21 Jul 2014 11:40:25 -0400 Received: from hqnvupgp08.nvidia.com (Not Verified[216.228.121.13]) by hqemgate14.nvidia.com id ; Mon, 21 Jul 2014 08:41:23 -0700 Received: from hqemhub01.nvidia.com ([172.20.12.94]) by hqnvupgp08.nvidia.com (PGP Universal service); Mon, 21 Jul 2014 08:32:39 -0700 X-PGP-Universal: processed; by hqnvupgp08.nvidia.com on Mon, 21 Jul 2014 08:32:39 -0700 Received: from ttynkkynen-lnx.Nvidia.com (172.20.144.16) by hqemhub01.nvidia.com (172.20.150.30) with Microsoft SMTP Server id 8.3.342.0; Mon, 21 Jul 2014 08:40:24 -0700 From: Tuomas Tynkkynen To: , , , CC: Stephen Warren , Thierry Reding , Peter De Schrijver , Prashant Gaikwad , Mike Turquette , "Rafael J. Wysocki" , Viresh Kumar , Paul Walmsley , , Tuomas Tynkkynen Subject: [PATCH v2 13/16] cpufreq: tegra124: Add device tree bindings Date: Mon, 21 Jul 2014 18:38:59 +0300 Message-ID: <1405957142-19416-14-git-send-email-ttynkkynen@nvidia.com> X-Mailer: git-send-email 1.8.1.5 In-Reply-To: <1405957142-19416-1-git-send-email-ttynkkynen@nvidia.com> References: <1405957142-19416-1-git-send-email-ttynkkynen@nvidia.com> X-NVConfidentiality: public MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP The cpufreq driver for Tegra124 will be a different one than the old Tegra20 cpufreq driver (tegra-cpufreq), which does not use the device tree. Signed-off-by: Tuomas Tynkkynen --- v2 changes: - The clock-latency property was added, as cpufreq-cpu0 wants that .../bindings/cpufreq/tegra124-cpufreq.txt | 42 ++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt diff --git a/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt new file mode 100644 index 0000000..031545a --- /dev/null +++ b/Documentation/devicetree/bindings/cpufreq/tegra124-cpufreq.txt @@ -0,0 +1,42 @@ +Tegra124 CPU frequency scaling driver bindings +---------------------------------------------- + +Both required and optional properties listed below must be defined +under node /cpus/cpu@0. + +Required properties: +- clocks: Must contain an entry for each entry in clock-names. + See ../clocks/clock-bindings.txt for details. +- clock-names: Must include the following entries: + - cpu_g: Clock mux for the fast CPU cluster. + - cpu_lp: Clock mux for the low-power CPU cluster. + - pll_x: Fast PLL clocksource. + - pll_p: Auxiliary PLL used during fast PLL rate changes. + - dfll: Fast DFLL clocksource that also automatically scales CPU voltage. + +Optional properties: +- clock-latency: Specify the possible maximum transition latency for clock, + in unit of nanoseconds. + +Example: +-------- +cpus { + #address-cells = <1>; + #size-cells = <0>; + + cpu@0 { + device_type = "cpu"; + compatible = "arm,cortex-a15"; + reg = <0>; + + clocks = <&tegra_car TEGRA124_CLK_CCLK_G>, + <&tegra_car TEGRA124_CLK_CCLK_LP>, + <&tegra_car TEGRA124_CLK_PLL_X>, + <&tegra_car TEGRA124_CLK_PLL_P>, + <&dfll>; + clock-names = "cpu_g", "cpu_lp", "pll_x", "pll_p", "dfll"; + clock-latency = <300000>; + }; + + <...> +};