From patchwork Thu Aug 29 13:15:57 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tero Kristo X-Patchwork-Id: 2851310 Return-Path: X-Original-To: patchwork-linux-omap@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.19.201]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 0B2969F271 for ; Thu, 29 Aug 2013 13:17:44 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id BCFEC2030D for ; Thu, 29 Aug 2013 13:17:42 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 696D720315 for ; Thu, 29 Aug 2013 13:17:41 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1753786Ab3H2NRj (ORCPT ); Thu, 29 Aug 2013 09:17:39 -0400 Received: from comal.ext.ti.com ([198.47.26.152]:47964 "EHLO comal.ext.ti.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1754076Ab3H2NRb (ORCPT ); Thu, 29 Aug 2013 09:17:31 -0400 Received: from dlelxv90.itg.ti.com ([172.17.2.17]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id r7TDH1u1010433; Thu, 29 Aug 2013 08:17:01 -0500 Received: from DLEE71.ent.ti.com (dlee71.ent.ti.com [157.170.170.114]) by dlelxv90.itg.ti.com (8.14.3/8.13.8) with ESMTP id r7TDH1Sj028339; Thu, 29 Aug 2013 08:17:01 -0500 Received: from dlep33.itg.ti.com (157.170.170.75) by DLEE71.ent.ti.com (157.170.170.114) with Microsoft SMTP Server id 14.2.342.3; Thu, 29 Aug 2013 08:17:01 -0500 Received: from sokoban.tieu.ti.com (ileax41-snat.itg.ti.com [10.172.224.153]) by dlep33.itg.ti.com (8.14.3/8.13.8) with ESMTP id r7TDGkJw002988; Thu, 29 Aug 2013 08:16:59 -0500 From: Tero Kristo To: , , , , , CC: , Subject: [PATCHv6 05/45] CLK: TI: add support for clockdomain binding Date: Thu, 29 Aug 2013 16:15:57 +0300 Message-ID: <1377782197-10611-6-git-send-email-t-kristo@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1377782197-10611-1-git-send-email-t-kristo@ti.com> References: <1377782197-10611-1-git-send-email-t-kristo@ti.com> MIME-Version: 1.0 Sender: linux-omap-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-omap@vger.kernel.org X-Spam-Status: No, score=-9.4 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 Some OMAP clocks require knowledge about their parent clockdomain for book keeping purposes. This patch creates a new DT binding for TI clockdomains, which act as a collection of device clocks. Signed-off-by: Tero Kristo --- .../devicetree/bindings/clock/ti/clockdomain.txt | 19 ++++++++ arch/arm/mach-omap2/clock.h | 1 - drivers/clk/ti/Makefile | 3 +- drivers/clk/ti/clockdomain.c | 46 ++++++++++++++++++++ include/linux/clk/ti.h | 2 + 5 files changed, 69 insertions(+), 2 deletions(-) create mode 100644 Documentation/devicetree/bindings/clock/ti/clockdomain.txt create mode 100644 drivers/clk/ti/clockdomain.c diff --git a/Documentation/devicetree/bindings/clock/ti/clockdomain.txt b/Documentation/devicetree/bindings/clock/ti/clockdomain.txt new file mode 100644 index 0000000..0dc5cd7 --- /dev/null +++ b/Documentation/devicetree/bindings/clock/ti/clockdomain.txt @@ -0,0 +1,19 @@ +Binding for Texas Instruments clockdomain. + +This binding uses the common clock binding[1]. Every clock on +TI SoC belongs to one clockdomain, but software only needs this +information for specific clocks which require their parent +clockdomain to be controlled when the clock is enabled/disabled. + +[1] Documentation/devicetree/bindings/clock/clock-bindings.txt + +Required properties: +- compatible : shall be "ti,clockdomain" +- #clock-cells : from common clock binding; shall be set to 0. +- clocks : link phandles of clocks within this domain + +Examples: + dss_clkdm: dss_clkdm { + compatible = "ti,clockdomain"; + clocks = <&dss1_alwon_fck_3430es2>, <&dss_ick_3430es2>; + }; diff --git a/arch/arm/mach-omap2/clock.h b/arch/arm/mach-omap2/clock.h index f0b7218..56d4664 100644 --- a/arch/arm/mach-omap2/clock.h +++ b/arch/arm/mach-omap2/clock.h @@ -38,7 +38,6 @@ struct omap_clk { } struct clockdomain; -#define to_clk_hw_omap(_hw) container_of(_hw, struct clk_hw_omap, hw) #define DEFINE_STRUCT_CLK(_name, _parent_array_name, _clkops_name) \ static struct clk _name = { \ diff --git a/drivers/clk/ti/Makefile b/drivers/clk/ti/Makefile index 57bfbaa..21dff46 100644 --- a/drivers/clk/ti/Makefile +++ b/drivers/clk/ti/Makefile @@ -1,3 +1,4 @@ ifneq ($(CONFIG_OF),) -obj-y += clk.o dpll.o autoidle.o gate.o +obj-y += clk.o dpll.o autoidle.o gate.o \ + clockdomain.o endif diff --git a/drivers/clk/ti/clockdomain.c b/drivers/clk/ti/clockdomain.c new file mode 100644 index 0000000..bc02937 --- /dev/null +++ b/drivers/clk/ti/clockdomain.c @@ -0,0 +1,46 @@ +/* + * OMAP clockdomain support + * + * Copyright (C) 2013 Texas Instruments, Inc. + * + * Tero Kristo + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This program is distributed "as is" WITHOUT ANY WARRANTY of any + * kind, whether express or implied; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include + +void __init of_omap_clockdomain_setup(struct device_node *node) +{ + struct clk *clk; + struct clk_hw *clk_hw; + const char *clkdm_name = node->name; + int i; + int num_clks; + + num_clks = of_count_phandle_with_args(node, "clocks", "#clock-cells"); + + for (i = 0; i < num_clks; i++) { + clk = of_clk_get(node, i); + if (__clk_get_flags(clk) & CLK_IS_BASIC) { + pr_warn("%s: can't setup clkdm for basic clk %s\n", + __func__, __clk_get_name(clk)); + continue; + } + clk_hw = __clk_get_hw(clk); + to_clk_hw_omap(clk_hw)->clkdm_name = clkdm_name; + omap2_init_clk_clkdm(clk_hw); + } +} +CLK_OF_DECLARE(omap_clockdomain, "ti,clockdomain", of_omap_clockdomain_setup); diff --git a/include/linux/clk/ti.h b/include/linux/clk/ti.h index 5fe2d43..ab73f35 100644 --- a/include/linux/clk/ti.h +++ b/include/linux/clk/ti.h @@ -186,6 +186,8 @@ struct omap_dt_clk { .node_name = name, \ } +#define to_clk_hw_omap(_hw) container_of(_hw, struct clk_hw_omap, hw) + void omap2_init_clk_hw_omap_clocks(struct clk *clk); int omap3_noncore_dpll_enable(struct clk_hw *hw); void omap3_noncore_dpll_disable(struct clk_hw *hw);