From patchwork Tue Aug 20 11:13:16 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aisheng Dong X-Patchwork-Id: 11103611 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 A0A1214F7 for ; Tue, 20 Aug 2019 11:32:07 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 87BF8205C9 for ; Tue, 20 Aug 2019 11:32:07 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729674AbfHTLcH (ORCPT ); Tue, 20 Aug 2019 07:32:07 -0400 Received: from inva020.nxp.com ([92.121.34.13]:55474 "EHLO inva020.nxp.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729639AbfHTLcH (ORCPT ); Tue, 20 Aug 2019 07:32:07 -0400 Received: from inva020.nxp.com (localhost [127.0.0.1]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id 3FC7B1A0117; Tue, 20 Aug 2019 13:32:04 +0200 (CEST) Received: from invc005.ap-rdc01.nxp.com (invc005.ap-rdc01.nxp.com [165.114.16.14]) by inva020.eu-rdc02.nxp.com (Postfix) with ESMTP id E71C41A0275; Tue, 20 Aug 2019 13:31:58 +0200 (CEST) Received: from localhost.localdomain (shlinux2.ap.freescale.net [10.192.224.44]) by invc005.ap-rdc01.nxp.com (Postfix) with ESMTP id 74C8A40318; Tue, 20 Aug 2019 19:31:52 +0800 (SGT) From: Dong Aisheng To: linux-clk@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org, sboyd@kernel.org, mturquette@baylibre.com, shawnguo@kernel.org, fabio.estevam@nxp.com, linux-imx@nxp.com, kernel@pengutronix.de, Dong Aisheng , Rob Herring , devicetree@vger.kernel.org Subject: [PATCH V4 02/11] dt-bindings: clock: imx-lpcg: add support to parse clocks from device tree Date: Tue, 20 Aug 2019 07:13:16 -0400 Message-Id: <1566299605-15641-3-git-send-email-aisheng.dong@nxp.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1566299605-15641-1-git-send-email-aisheng.dong@nxp.com> References: <1566299605-15641-1-git-send-email-aisheng.dong@nxp.com> X-Virus-Scanned: ClamAV using ClamSMTP Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org MX8QM and MX8QXP LPCG Clocks are mostly the same except they may reside in different subsystems across CPUs and also vary a bit on the availability. Same as SCU clock, we want to move the clock definition into device tree which can fully decouple the dependency of Clock ID definition from device tree and make us be able to write a fully generic lpcg clock driver. And we can also use the existence of clock nodes in device tree to address the device and clock availability differences across different SoCs. Cc: Rob Herring Cc: Stephen Boyd Cc: Shawn Guo Cc: Sascha Hauer Cc: Michael Turquette Cc: devicetree@vger.kernel.org Signed-off-by: Dong Aisheng Acked-by: Shawn Guo Reviewed-by: Rob Herring Reviewed-by: Stephen Boyd --- ChangeLog: v3->v4: * change bit-offset property to clock-indices * use constant macro to define clock indinces * drop hw-autogate property which is still not used by drivers v2->v3: * no changes v1->v2: * Update example * Add power domain property --- .../devicetree/bindings/clock/imx8qxp-lpcg.txt | 36 ++++++++++++++++++---- include/dt-bindings/clock/imx8-lpcg.h | 14 +++++++++ 2 files changed, 44 insertions(+), 6 deletions(-) create mode 100644 include/dt-bindings/clock/imx8-lpcg.h diff --git a/Documentation/devicetree/bindings/clock/imx8qxp-lpcg.txt b/Documentation/devicetree/bindings/clock/imx8qxp-lpcg.txt index 965cfa4..cad8fc4 100644 --- a/Documentation/devicetree/bindings/clock/imx8qxp-lpcg.txt +++ b/Documentation/devicetree/bindings/clock/imx8qxp-lpcg.txt @@ -11,6 +11,21 @@ enabled by these control bits, it might still not be running based on the base resource. Required properties: +- compatible: Should be one of: + "fsl,imx8qxp-lpcg" + "fsl,imx8qm-lpcg" followed by "fsl,imx8qxp-lpcg". +- reg: Address and length of the register set. +- #clock-cells: Should be 1. One LPCG supports multiple clocks. +- clocks: Input parent clocks phandle array for each clock. +- clock-indices: An integer array indicating the bit offset for each clock. + Refer to for the + supported LPCG clock indices. +- clock-output-names: Shall be the corresponding names of the outputs. + NOTE this property must be specified in the same order + as the clock-indices property. +- power-domains: Should contain the power domain used by this clock. + +Legacy binding (DEPRECATED): - compatible: Should be one of: "fsl,imx8qxp-lpcg-adma", "fsl,imx8qxp-lpcg-conn", @@ -33,10 +48,19 @@ Examples: #include -conn_lpcg: clock-controller@5b200000 { - compatible = "fsl,imx8qxp-lpcg-conn"; - reg = <0x5b200000 0xb0000>; +sdhc0_lpcg: clock-controller@5b200000 { + compatible = "fsl,imx8qxp-lpcg"; + reg = <0x5b200000 0x10000>; #clock-cells = <1>; + clocks = <&sdhc0_clk IMX_SC_PM_CLK_PER>, + <&conn_ipg_clk>, <&conn_axi_clk>; + clock-indices = , + , + ; + clock-output-names = "sdhc0_lpcg_per_clk", + "sdhc0_lpcg_ipg_clk", + "sdhc0_lpcg_ahb_clk"; + power-domains = <&pd IMX_SC_R_SDHC_0>; }; usdhc1: mmc@5b010000 { @@ -44,8 +68,8 @@ usdhc1: mmc@5b010000 { interrupt-parent = <&gic>; interrupts = ; reg = <0x5b010000 0x10000>; - clocks = <&conn_lpcg IMX8QXP_CONN_LPCG_SDHC0_IPG_CLK>, - <&conn_lpcg IMX8QXP_CONN_LPCG_SDHC0_PER_CLK>, - <&conn_lpcg IMX8QXP_CONN_LPCG_SDHC0_HCLK>; + clocks = <&sdhc0_lpcg IMX_LPCG_CLK_4>, + <&sdhc0_lpcg IMX_LPCG_CLK_0>, + <&sdhc0_lpcg IMX_LPCG_CLK_5>; clock-names = "ipg", "per", "ahb"; }; diff --git a/include/dt-bindings/clock/imx8-lpcg.h b/include/dt-bindings/clock/imx8-lpcg.h new file mode 100644 index 0000000..df90aad --- /dev/null +++ b/include/dt-bindings/clock/imx8-lpcg.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0+ */ +/* + * Copyright 2019 NXP + * Dong Aisheng + */ + +#define IMX_LPCG_CLK_0 0 +#define IMX_LPCG_CLK_1 4 +#define IMX_LPCG_CLK_2 8 +#define IMX_LPCG_CLK_3 12 +#define IMX_LPCG_CLK_4 16 +#define IMX_LPCG_CLK_5 20 +#define IMX_LPCG_CLK_6 24 +#define IMX_LPCG_CLK_7 28