From patchwork Thu May 28 18:53:28 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Geert Uytterhoeven X-Patchwork-Id: 6501001 X-Patchwork-Delegate: geert@linux-m68k.org Return-Path: X-Original-To: patchwork-linux-sh@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id CE8789F38C for ; Thu, 28 May 2015 18:57:16 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DB7C42076B for ; Thu, 28 May 2015 18:57:15 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E353E2076C for ; Thu, 28 May 2015 18:57:14 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754961AbbE1Syx (ORCPT ); Thu, 28 May 2015 14:54:53 -0400 Received: from andre.telenet-ops.be ([195.130.132.53]:49587 "EHLO andre.telenet-ops.be" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754843AbbE1Sx4 (ORCPT ); Thu, 28 May 2015 14:53:56 -0400 Received: from ayla.of.borg ([84.193.93.87]) by andre.telenet-ops.be with bizsmtp id ZWtj1q01B1t5w8s01WtjWT; Thu, 28 May 2015 20:53:54 +0200 Received: from ramsan.of.borg ([192.168.97.29] helo=ramsan) by ayla.of.borg with esmtp (Exim 4.82) (envelope-from ) id 1Yy2w3-0001hX-Ew; Thu, 28 May 2015 20:53:43 +0200 Received: from geert by ramsan with local (Exim 4.82) (envelope-from ) id 1Yy2w9-00008j-Ts; Thu, 28 May 2015 20:53:49 +0200 From: Geert Uytterhoeven To: Mike Turquette , Stephen Boyd , Simon Horman , Magnus Damm , Laurent Pinchart , "Rafael J. Wysocki" , Kevin Hilman , Ulf Hansson Cc: linux-clk@vger.kernel.org, linux-pm@vger.kernel.org, linux-sh@vger.kernel.org, linux-arm-kernel@lists.infradead.org, devicetree@vger.kernel.org, linux-kernel@vger.kernel.org, Geert Uytterhoeven Subject: [PATCH v2 03/14] clk: shmobile: r8a7779: Add CPG Clock Domain support Date: Thu, 28 May 2015 20:53:28 +0200 Message-Id: <1432839219-475-4-git-send-email-geert+renesas@glider.be> X-Mailer: git-send-email 1.9.1 In-Reply-To: <1432839219-475-1-git-send-email-geert+renesas@glider.be> References: <1432839219-475-1-git-send-email-geert+renesas@glider.be> Sender: linux-sh-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-sh@vger.kernel.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, T_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 Add Clock Domain support to the R-Car H1 Clock Pulse Generator (CPG) driver using the generic PM Domain. This allows to power-manage the module clocks of SoC devices that are part of the CPG Clock Domain using Runtime PM, or for system suspend/resume. SoC devices that are part of the CPG Clock Domain and can be power-managed through an MSTP clock should be tagged in DT with a proper "power-domains" property. Also update the reg property in the DT binding doc example to match the actual dtsi, which uses #address-cells and #size-cells == 1, not 2. Signed-off-by: Geert Uytterhoeven --- v2: - New. --- .../bindings/clock/renesas,r8a7779-cpg-clocks.txt | 30 +++++++++++++++++++--- drivers/clk/shmobile/clk-r8a7779.c | 2 ++ 2 files changed, 28 insertions(+), 4 deletions(-) diff --git a/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt b/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt index ed3c8cb12f4eb699..ded99abb4b6435ee 100644 --- a/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt +++ b/Documentation/devicetree/bindings/clock/renesas,r8a7779-cpg-clocks.txt @@ -1,7 +1,9 @@ * Renesas R8A7779 Clock Pulse Generator (CPG) The CPG generates core clocks for the R8A7779. It includes one PLL and -several fixed ratio dividers +several fixed ratio dividers. +The CPG also provides a Clock Domain for SoC devices, in combination with the +CPG Module Stop (MSTP) Clocks. Required Properties: @@ -12,16 +14,36 @@ Required Properties: - #clock-cells: Must be 1 - clock-output-names: The names of the clocks. Supported clocks are "plla", "z", "zs", "s", "s1", "p", "b", "out". + - #power-domain-cells: Must be 0 +SoC devices that are part of the CPG Clock Domain and can be power-managed +through an MSTP clock should refer to the CPG device node in their +"power-domains" property, as documented by the generic PM domain bindings in +Documentation/devicetree/bindings/power/power_domain.txt. -Example -------- + +Examples +-------- + + - CPG device node: cpg_clocks: cpg_clocks@ffc80000 { compatible = "renesas,r8a7779-cpg-clocks"; - reg = <0 0xffc80000 0 0x30>; + reg = <0xffc80000 0x30>; clocks = <&extal_clk>; #clock-cells = <1>; clock-output-names = "plla", "z", "zs", "s", "s1", "p", "b", "out"; + #power-domain-cells = <0>; + }; + + + - CPG Clock Domain member device node: + + sata: sata@fc600000 { + compatible = "renesas,sata-r8a7779", "renesas,rcar-sata"; + reg = <0xfc600000 0x2000>; + interrupts = <0 100 IRQ_TYPE_LEVEL_HIGH>; + clocks = <&mstp1_clks R8A7779_CLK_SATA>; + power-domains = <&cpg_clocks>; }; diff --git a/drivers/clk/shmobile/clk-r8a7779.c b/drivers/clk/shmobile/clk-r8a7779.c index 652ecacb6daf7922..e42a63a2ad251de2 100644 --- a/drivers/clk/shmobile/clk-r8a7779.c +++ b/drivers/clk/shmobile/clk-r8a7779.c @@ -168,6 +168,8 @@ static void __init r8a7779_cpg_clocks_init(struct device_node *np) } of_clk_add_provider(np, of_clk_src_onecell_get, &cpg->data); + + cpg_mstp_add_clk_domain(np); } CLK_OF_DECLARE(r8a7779_cpg_clks, "renesas,r8a7779-cpg-clocks", r8a7779_cpg_clocks_init);