From patchwork Tue Dec 24 19:05:38 2013 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Anson Huang X-Patchwork-Id: 3400991 Return-Path: X-Original-To: patchwork-linux-arm@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 52E099F375 for ; Tue, 24 Dec 2013 07:08:20 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 5009A20615 for ; Tue, 24 Dec 2013 07:08:19 +0000 (UTC) Received: from casper.infradead.org (casper.infradead.org [85.118.1.10]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id CF4AB20614 for ; Tue, 24 Dec 2013 07:08:17 +0000 (UTC) Received: from merlin.infradead.org ([2001:4978:20e::2]) by casper.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VvM65-0006YS-Kw; Tue, 24 Dec 2013 07:08:09 +0000 Received: from localhost ([::1] helo=merlin.infradead.org) by merlin.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1VvM63-0008Dv-47; Tue, 24 Dec 2013 07:08:07 +0000 Received: from ch1ehsobe006.messaging.microsoft.com ([216.32.181.186] helo=ch1outboundpool.messaging.microsoft.com) by merlin.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1VvM60-0008Db-Gd for linux-arm-kernel@lists.infradead.org; Tue, 24 Dec 2013 07:08:05 +0000 Received: from mail52-ch1-R.bigfish.com (10.43.68.238) by CH1EHSOBE012.bigfish.com (10.43.70.62) with Microsoft SMTP Server id 14.1.225.22; Tue, 24 Dec 2013 07:07:42 +0000 Received: from mail52-ch1 (localhost [127.0.0.1]) by mail52-ch1-R.bigfish.com (Postfix) with ESMTP id DB23360314; Tue, 24 Dec 2013 07:07:42 +0000 (UTC) X-Forefront-Antispam-Report: CIP:70.37.183.190; KIP:(null); UIP:(null); IPV:NLI; H:mail.freescale.net; RD:none; EFVD:NLI X-SpamScore: 3 X-BigFish: VS3(zzzz1f42h2148h208ch1ee6h1de0h1fdah2073h2146h1202h1e76h2189h1d1ah1d2ah1fc6h1082kzz1de098h8275bh1de097hz2dh2a8h839hd24he5bhf0ah1288h12a5h12a9h12bdh12e5h137ah139eh13b6h1441h1504h1537h162dh1631h1758h1898h18e1h1946h19b5h1ad9h1b0ah1b2fh2222h224fh1fb3h1d0ch1d2eh1d3fh1dc1h1dfeh1dffh1e23h1fe8h1ff5h2218h2216h226dh22d0h2327h2336h1155h) Received: from mail52-ch1 (localhost.localdomain [127.0.0.1]) by mail52-ch1 (MessageSwitch) id 1387868860287485_11841; Tue, 24 Dec 2013 07:07:40 +0000 (UTC) Received: from CH1EHSMHS010.bigfish.com (snatpool2.int.messaging.microsoft.com [10.43.68.238]) by mail52-ch1.bigfish.com (Postfix) with ESMTP id 41969440047; Tue, 24 Dec 2013 07:07:40 +0000 (UTC) Received: from mail.freescale.net (70.37.183.190) by CH1EHSMHS010.bigfish.com (10.43.70.10) with Microsoft SMTP Server (TLS) id 14.16.227.3; Tue, 24 Dec 2013 07:07:40 +0000 Received: from tx30smr01.am.freescale.net (10.81.153.31) by 039-SN1MMR1-001.039d.mgd.msft.net (10.84.1.13) with Microsoft SMTP Server (TLS) id 14.3.158.2; Tue, 24 Dec 2013 07:07:39 +0000 Received: from ubuntu.ap.freescale.net (ubuntu-010192242118.ap.freescale.net [10.192.242.118]) by tx30smr01.am.freescale.net (8.14.3/8.14.0) with ESMTP id rBO77a8w016888; Tue, 24 Dec 2013 00:07:37 -0700 From: Anson Huang To: , Subject: [PATCH] ARM: imx: add necessary interface for pfd Date: Tue, 24 Dec 2013 14:05:38 -0500 Message-ID: <1387911938-4828-1-git-send-email-b20788@freescale.com> X-Mailer: git-send-email 1.7.9.5 MIME-Version: 1.0 X-OriginatorOrg: freescale.com X-FOPE-CONNECTOR: Id%0$Dn%*$RO%0$TLS%0$FQDN%$TlsDn% X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20131224_020804_595750_359A29CB X-CRM114-Status: GOOD ( 10.90 ) X-Spam-Score: -0.7 (/) Cc: linux-kernel@vger.kernel.org, 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 X-Spam-Status: No, score=-2.8 required=5.0 tests=BAYES_00, DATE_IN_FUTURE_06_12, RCVD_IN_DNSWL_MED, 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 Common clk framework will disable unused clks in late init only if they are enabled by default and no one is using it, so we need to add is_enabled callback for clk framework to get clks' status. PFD clocks are enabled by hardware reset, so we need to add interface for common clk framework to disable those unused ones for saving power. Signed-off-by: Anson Huang --- arch/arm/mach-imx/clk-pfd.c | 11 +++++++++++ 1 file changed, 11 insertions(+) diff --git a/arch/arm/mach-imx/clk-pfd.c b/arch/arm/mach-imx/clk-pfd.c index e2ed416..0b0f6f6 100644 --- a/arch/arm/mach-imx/clk-pfd.c +++ b/arch/arm/mach-imx/clk-pfd.c @@ -109,12 +109,23 @@ static int clk_pfd_set_rate(struct clk_hw *hw, unsigned long rate, return 0; } +static int clk_pfd_is_enabled(struct clk_hw *hw) +{ + struct clk_pfd *pfd = to_clk_pfd(hw); + + if (readl_relaxed(pfd->reg) & (1 << ((pfd->idx + 1) * 8 - 1))) + return 0; + + return 1; +} + static const struct clk_ops clk_pfd_ops = { .enable = clk_pfd_enable, .disable = clk_pfd_disable, .recalc_rate = clk_pfd_recalc_rate, .round_rate = clk_pfd_round_rate, .set_rate = clk_pfd_set_rate, + .is_enabled = clk_pfd_is_enabled, }; struct clk *imx_clk_pfd(const char *name, const char *parent_name,