From patchwork Mon Mar 25 09:37:48 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: avinash philip X-Patchwork-Id: 2329581 Return-Path: X-Original-To: patchwork-linux-arm@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from merlin.infradead.org (merlin.infradead.org [205.233.59.134]) by patchwork1.kernel.org (Postfix) with ESMTP id E6FE23FD8C for ; Mon, 25 Mar 2013 09:39:59 +0000 (UTC) Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1UK3qF-0007zj-Jc; Mon, 25 Mar 2013 09:37:23 +0000 Received: from comal.ext.ti.com ([198.47.26.152]) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1UK3qB-0007yZ-Gi for linux-arm-kernel@lists.infradead.org; Mon, 25 Mar 2013 09:37:20 +0000 Received: from dbdp20.itg.ti.com ([172.24.170.38]) by comal.ext.ti.com (8.13.7/8.13.7) with ESMTP id r2P9bGjw002652 for ; Mon, 25 Mar 2013 04:37:17 -0500 Received: from DBDE70.ent.ti.com (localhost [127.0.0.1]) by dbdp20.itg.ti.com (8.13.8/8.13.8) with ESMTP id r2P9bDPH006953; Mon, 25 Mar 2013 15:07:14 +0530 (IST) Received: from dbdp32.itg.ti.com (172.24.170.251) by dbde70.ent.ti.com (172.24.170.148) with Microsoft SMTP Server id 14.1.323.3; Mon, 25 Mar 2013 15:07:13 +0530 Received: from ucmsshproxy.india.ext.ti.com (dbdp20.itg.ti.com [172.24.170.38]) by dbdp32.itg.ti.com (8.13.8/8.13.8) with SMTP id r2P9bDpf014788; Mon, 25 Mar 2013 15:07:13 +0530 Received: from symphony.india.ext.ti.com (unknown [192.168.247.13]) by ucmsshproxy.india.ext.ti.com (Postfix) with ESMTP id 83685158006; Mon, 25 Mar 2013 15:07:12 +0530 (IST) Received: from ubuntu-psp-linux.india.ext.ti.com (ubuntu-psp-linux [192.168.247.46]) by symphony.india.ext.ti.com (8.11.7p1+Sun/8.11.7) with ESMTP id r2P9bAR13862; Mon, 25 Mar 2013 15:07:10 +0530 (IST) From: Philip Avinash To: Subject: [PATCH v3 1/3] ARM: davinci: clk framework support for enable/disable functionality Date: Mon, 25 Mar 2013 15:07:48 +0530 Message-ID: <1364204268-15010-1-git-send-email-avinashphilip@ti.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1364197789-16783-1-git-send-email-avinashphilip@ti.com> References: <1364197789-16783-1-git-send-email-avinashphilip@ti.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20130325_053719_680699_37543EB1 X-CRM114-Status: GOOD ( 13.03 ) X-Spam-Score: -8.2 (--------) X-Spam-Report: SpamAssassin version 3.3.2 on merlin.infradead.org summary: Content analysis details: (-8.2 points) pts rule name description ---- ---------------------- -------------------------------------------------- -5.0 RCVD_IN_DNSWL_HI RBL: Sender listed at http://www.dnswl.org/, high trust [198.47.26.152 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -1.3 RP_MATCHES_RCVD Envelope sender domain matches handover relay domain -1.9 BAYES_00 BODY: Bayes spam probability is 0 to 1% [score: 0.0000] Cc: davinci-linux-open-source@linux.davincidsp.com, Philip Avinash , linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org Davinci clock framework currently not supporting clock enable/disable functionality on clock nodes. In Davinci platform, EHRPWM module requires support for clock enable/disable for TBCLK support. Hence this patch adds support for enabling/disabling clocks depends on the availability of the functionality. Signed-off-by: Philip Avinash --- Changes since v2: - start using "usecount" field in clk structure to enable/disable clocks. Changes since v1: - Add support for clock enable/disable functionality. arch/arm/mach-davinci/clock.c | 21 ++++++++++++++------- arch/arm/mach-davinci/clock.h | 2 ++ 2 files changed, 16 insertions(+), 7 deletions(-) diff --git a/arch/arm/mach-davinci/clock.c b/arch/arm/mach-davinci/clock.c index d458558..960c7a5 100644 --- a/arch/arm/mach-davinci/clock.c +++ b/arch/arm/mach-davinci/clock.c @@ -35,19 +35,26 @@ static void __clk_enable(struct clk *clk) { if (clk->parent) __clk_enable(clk->parent); - if (clk->usecount++ == 0 && (clk->flags & CLK_PSC)) - davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc, - true, clk->flags); + if (clk->usecount++ == 0) { + if (clk->flags & CLK_PSC) + davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc, + true, clk->flags); + else if (clk->clk_enable) + clk->clk_enable(clk); + } } static void __clk_disable(struct clk *clk) { if (WARN_ON(clk->usecount == 0)) return; - if (--clk->usecount == 0 && !(clk->flags & CLK_PLL) && - (clk->flags & CLK_PSC)) - davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc, - false, clk->flags); + if (--clk->usecount == 0) { + if (!(clk->flags & CLK_PLL) && (clk->flags & CLK_PSC)) + davinci_psc_config(clk->domain, clk->gpsc, clk->lpsc, + false, clk->flags); + else if (clk->clk_disable) + clk->clk_disable(clk); + } if (clk->parent) __clk_disable(clk->parent); } diff --git a/arch/arm/mach-davinci/clock.h b/arch/arm/mach-davinci/clock.h index 8694b39..1e4e836 100644 --- a/arch/arm/mach-davinci/clock.h +++ b/arch/arm/mach-davinci/clock.h @@ -104,6 +104,8 @@ struct clk { int (*set_rate) (struct clk *clk, unsigned long rate); int (*round_rate) (struct clk *clk, unsigned long rate); int (*reset) (struct clk *clk, bool reset); + void (*clk_enable) (struct clk *clk); + void (*clk_disable) (struct clk *clk); }; /* Clock flags: SoC-specific flags start at BIT(16) */