From patchwork Thu Oct 31 21:50:24 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Leonard Crestez X-Patchwork-Id: 11221919 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 14B491599 for ; Thu, 31 Oct 2019 21:50:39 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id F0A4A2173E for ; Thu, 31 Oct 2019 21:50:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729138AbfJaVui (ORCPT ); Thu, 31 Oct 2019 17:50:38 -0400 Received: from inva021.nxp.com ([92.121.34.21]:41856 "EHLO inva021.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728561AbfJaVui (ORCPT ); Thu, 31 Oct 2019 17:50:38 -0400 Received: from inva021.nxp.com (localhost [127.0.0.1]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 7D82A200578; Thu, 31 Oct 2019 22:50:35 +0100 (CET) Received: from inva024.eu-rdc02.nxp.com (inva024.eu-rdc02.nxp.com [134.27.226.22]) by inva021.eu-rdc02.nxp.com (Postfix) with ESMTP id 620362001E6; Thu, 31 Oct 2019 22:50:35 +0100 (CET) Received: from fsr-ub1864-112.ea.freescale.net (fsr-ub1864-112.ea.freescale.net [10.171.82.98]) by inva024.eu-rdc02.nxp.com (Postfix) with ESMTP id 53A00205E9; Thu, 31 Oct 2019 22:50:34 +0100 (CET) From: Leonard Crestez To: Stephen Boyd , MyungJoo Ham , Kyungmin Park , Rob Herring Cc: "Rafael J. Wysocki" , Shawn Guo , Chanwoo Choi , Mark Rutland , Michael Turquette , =?utf-8?b?QXJ0dXIgxZp3aWdvxYQ=?= , Saravana Kannan , Angus Ainslie , Martin Kepplinger , Matthias Kaehlcke , Krzysztof Kozlowski , Alexandre Bailon , Georgi Djakov , Dong Aisheng , Abel Vesa , Jacky Bai , Anson Huang , Fabio Estevam , Viresh Kumar , devicetree@vger.kernel.org, linux-pm@vger.kernel.org, linux-clk@vger.kernel.org, linux-imx@nxp.com, kernel@pengutronix.de, linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 3/6] dt-bindings: devfreq: Add bindings for imx ddr controller Date: Thu, 31 Oct 2019 23:50:24 +0200 Message-Id: X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add devicetree bindings for the i.MX DDR Controller on imx8m series chips. It supports dynamic frequency switching between multiple data rates and this is exposed to Linux via the devfreq subsystem. Signed-off-by: Leonard Crestez --- .../devicetree/bindings/devfreq/imx-ddrc.yaml | 60 +++++++++++++++++++ 1 file changed, 60 insertions(+) create mode 100644 Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml diff --git a/Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml b/Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml new file mode 100644 index 000000000000..31db204e6845 --- /dev/null +++ b/Documentation/devicetree/bindings/devfreq/imx-ddrc.yaml @@ -0,0 +1,60 @@ +# SPDX-License-Identifier: GPL-2.0 +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/devfreq/imx-devfreq.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: i.MX DDR Controller + +maintainers: + - Leonard Crestez + +properties: + compatible: + items: + - enum: + - fsl,imx8mn-ddrc + - fsl,imx8mm-ddrc + - fsl,imx8mq-ddrc + - const: fsl,imx8m-ddrc + + reg: + maxItems: 1 + + clocks: + maxItems: 4 + + clock-names: + items: + - const: dram_core + - const: dram_pll + - const: dram_alt + - const: dram_apb + + operating-points-v2: true + + devfreq-events: + description: Phandle of PMU node + $ref: "/schemas/types.yaml#/definitions/phandle" + +required: + - reg + - compatible + - clocks + - clock-names + +additionalProperties: false + +examples: + - | + #include + ddrc: dram-controller@3d400000 { + compatible = "fsl,imx8mm-ddrc", "fsl,imx8m-ddrc"; + reg = <0x3d400000 0x400000>; + clock-names = "dram_core", "dram_pll", "dram_alt", "dram_apb"; + clocks = <&clk IMX8MM_CLK_DRAM_CORE>, + <&clk IMX8MM_DRAM_PLL>, + <&clk IMX8MM_CLK_DRAM_ALT>, + <&clk IMX8MM_CLK_DRAM_APB>; + operating-points-v2 = <&ddrc_opp_table>; + };