From patchwork Fri Mar 16 02:52:56 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: David Lechner X-Patchwork-Id: 10286327 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 94190601BE for ; Fri, 16 Mar 2018 03:46:13 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 7FC012811A for ; Fri, 16 Mar 2018 03:46:13 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7448228D24; Fri, 16 Mar 2018 03:46:13 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-6.8 required=2.0 tests=BAYES_00,DKIM_SIGNED, RCVD_IN_DNSWL_HI,T_DKIM_INVALID autolearn=ham version=3.3.1 Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 1889F2811A for ; Fri, 16 Mar 2018 03:46:12 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1751791AbeCPDqL (ORCPT ); Thu, 15 Mar 2018 23:46:11 -0400 Received: from vern.gendns.com ([206.190.152.46]:57327 "EHLO vern.gendns.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751571AbeCPDqK (ORCPT ); Thu, 15 Mar 2018 23:46:10 -0400 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lechnology.com; s=default; h=References:In-Reply-To:Message-Id:Date:Subject :Cc:To:From:Sender:Reply-To:MIME-Version:Content-Type: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Id: List-Help:List-Unsubscribe:List-Subscribe:List-Post:List-Owner:List-Archive; bh=6cXzbc+qhp8ZG+K0E1xLYpsRLQPd88dEFVkSsqzpNGU=; b=n2Tt3lZaLXmFPYnjfjMWl4+V5 Dpe53q/GnfHt51dFwaMXXJL3QJvICmNHbFw4eW/iWTAWTZUOihWUkPE03kycek9rMEL6rVehiB2PO QGoh1tvDuUujmJIYTDOICGaWI510HbKMZiz/EGNdhCQI9GDl998PMUAs4+jHBTVm72viWjAuTHoVp XRPxYnVYNcOW/Yup9gDjvh+AW/LZ3hCmwGFqM+jHQaZkmmQ3pK996QG/3FuLHNiO9cpatbQ7oWo5Q dnWqUlA3EGsEP/aHcK/wiBoSa0PkI0FdWj83xszg0j17D6MujmbtZ0aF69MCrgjwfigVlyhEJjwxX QI6r+yizA==; Received: from 108-198-5-147.lightspeed.okcbok.sbcglobal.net ([108.198.5.147]:44986 helo=freyr.lechnology.com) by vern.gendns.com with esmtpsa (TLSv1.2:ECDHE-RSA-AES128-SHA256:128) (Exim 4.89_1) (envelope-from ) id 1ewfTn-002UlD-IV; Thu, 15 Mar 2018 22:52:27 -0400 From: David Lechner To: linux-clk@vger.kernel.org, devicetree@vger.kernel.org, linux-arm-kernel@lists.infradead.org Cc: Michael Turquette , Stephen Boyd , Rob Herring , Mark Rutland , Sekhar Nori , Kevin Hilman , Bartosz Golaszewski , Adam Ford , linux-kernel@vger.kernel.org, David Lechner Subject: [PATCH v8 40/42] ARM: davinci: add device tree support to timer Date: Thu, 15 Mar 2018 21:52:56 -0500 Message-Id: <1521168778-27236-41-git-send-email-david@lechnology.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1521168778-27236-1-git-send-email-david@lechnology.com> References: <1521168778-27236-1-git-send-email-david@lechnology.com> X-AntiAbuse: This header was added to track abuse, please include it with any abuse report X-AntiAbuse: Primary Hostname - vern.gendns.com X-AntiAbuse: Original Domain - vger.kernel.org X-AntiAbuse: Originator/Caller UID/GID - [47 12] / [47 12] X-AntiAbuse: Sender Address Domain - lechnology.com X-Get-Message-Sender-Via: vern.gendns.com: authenticated_id: davidmain+lechnology.com/only user confirmed/virtual account not confirmed X-Authenticated-Sender: vern.gendns.com: davidmain@lechnology.com X-Source: X-Source-Args: X-Source-Dir: Sender: linux-clk-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-clk@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP This adds device tree support to the davinci timer so that when clocks are moved to device tree, the timer will still work. Signed-off-by: David Lechner --- v8 changes: - none v7 changes: - add workaround for platform devices not available in early boot v6 changes: - none arch/arm/mach-davinci/Kconfig | 1 + arch/arm/mach-davinci/time.c | 31 +++++++++++++++++++++++++++++++ 2 files changed, 32 insertions(+) diff --git a/arch/arm/mach-davinci/Kconfig b/arch/arm/mach-davinci/Kconfig index ba9912b..da8a039 100644 --- a/arch/arm/mach-davinci/Kconfig +++ b/arch/arm/mach-davinci/Kconfig @@ -59,6 +59,7 @@ config MACH_DA8XX_DT default y depends on ARCH_DAVINCI_DA850 select PINCTRL + select TIMER_OF help Say y here to include support for TI DaVinci DA850 based using Flattened Device Tree. More information at Documentation/devicetree diff --git a/arch/arm/mach-davinci/time.c b/arch/arm/mach-davinci/time.c index d6a78f7..590b118 100644 --- a/arch/arm/mach-davinci/time.c +++ b/arch/arm/mach-davinci/time.c @@ -17,6 +17,7 @@ #include #include #include +#include #include #include @@ -405,3 +406,33 @@ void __init davinci_timer_init(struct clk *timer_clk) for (i=0; i< ARRAY_SIZE(timers); i++) timer32_config(&timers[i]); } + +static int __init of_davinci_timer_init(struct device_node *np) +{ + struct clk *clk; + + clk = of_clk_get(np, 0); + if (IS_ERR(clk)) { + struct of_phandle_args clkspec; + + /* + * Fall back to using ref_clk if the actual clock is not + * available. This currently always happens because platform + * clocks (i.e PLLs and PSCs) are registered as platform + * devices and therefore are not available at this point in + * the boot process. + */ + clkspec.np = of_find_node_by_name(NULL, "ref_clk"); + if (IS_ERR(clkspec.np)) { + pr_err("%s: No clock available for timer!\n", __func__); + return PTR_ERR(clkspec.np); + } + clk = of_clk_get_from_provider(&clkspec); + of_node_put(clkspec.np); + } + + davinci_timer_init(clk); + + return 0; +} +TIMER_OF_DECLARE(davinci_timer, "ti,davinci-timer", of_davinci_timer_init);