From patchwork Wed Jan 28 01:43:16 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wenyou Yang X-Patchwork-Id: 5722351 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 [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id E405B9F1D6 for ; Wed, 28 Jan 2015 01:49:38 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 2D3A620263 for ; Wed, 28 Jan 2015 01:49:38 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (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 5791B2025A for ; Wed, 28 Jan 2015 01:49:37 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1YGHjC-0001YL-45; Wed, 28 Jan 2015 01:47:34 +0000 Received: from eusmtp01.atmel.com ([212.144.249.243]) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1YGHj3-0001HX-DY for linux-arm-kernel@lists.infradead.org; Wed, 28 Jan 2015 01:47:26 +0000 Received: from apsmtp01.atmel.com (10.168.254.30) by eusmtp01.atmel.com (10.161.101.31) with Microsoft SMTP Server id 14.2.347.0; Wed, 28 Jan 2015 02:46:59 +0100 Received: from shaarm01.corp.atmel.com (10.168.254.13) by apsmtp01.corp.atmel.com (10.168.254.30) with Microsoft SMTP Server id 14.2.347.0; Wed, 28 Jan 2015 09:46:54 +0800 From: Wenyou Yang To: , Subject: [PATCH v4 05/13] pm: at91: move the copying the sram function to the sram initializationi phase Date: Wed, 28 Jan 2015 09:43:16 +0800 Message-ID: <1422409396-24394-1-git-send-email-wenyou.yang@atmel.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1422409172-24178-1-git-send-email-wenyou.yang@atmel.com> References: <1422409172-24178-1-git-send-email-wenyou.yang@atmel.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20150127_174725_858284_A827AFEF X-CRM114-Status: UNSURE ( 9.35 ) X-CRM114-Notice: Please train this message. X-Spam-Score: -0.7 (/) Cc: sergei.shtylyov@cogentembedded.com, sylvain.rochet@finsecur.com, linux-kernel@vger.kernel.org, linux@maxim.org.za, alexandre.belloni@free-electrons.com, wenyou.yang@atmel.com, peda@axentia.se, linux-arm-kernel@lists.infradead.org X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.18-1 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=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, 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 To decrease the suspend time, move the copying the sram function to the sram initialization phase, instead of every time go to suspend. In the meanwhile, if there is no sram allocated for PM, the PM is not supported. Signed-off-by: Wenyou Yang Acked-by: Alexandre Belloni --- arch/arm/mach-at91/pm.c | 12 +++++++----- 1 file changed, 7 insertions(+), 5 deletions(-) diff --git a/arch/arm/mach-at91/pm.c b/arch/arm/mach-at91/pm.c index 5dd4e41..6b08098 100644 --- a/arch/arm/mach-at91/pm.c +++ b/arch/arm/mach-at91/pm.c @@ -161,10 +161,6 @@ static int at91_pm_enter(suspend_state_t state) * turning off the main oscillator; reverse on wakeup. */ if (slow_clock) { -#ifdef CONFIG_AT91_SLOW_CLOCK - /* copy slow_clock handler to SRAM, and call it */ - memcpy(slow_clock, at91_slow_clock, at91_slow_clock_sz); -#endif slow_clock(at91_pmc_base, at91_ramc_base[0], at91_ramc_base[1], at91_pm_data.memctrl); @@ -272,6 +268,9 @@ static void __init at91_pm_sram_init(void) sram_pbase = gen_pool_virt_to_phys(sram_pool, sram_base); slow_clock = __arm_ioremap_exec(sram_pbase, at91_slow_clock_sz, false); + /* Copy the slow_clock handler to SRAM */ + memcpy(slow_clock, at91_slow_clock, at91_slow_clock_sz); + put_node: of_node_put(node); } @@ -289,7 +288,10 @@ static void __init at91_pm_init(void) if (at91_cpuidle_device.dev.platform_data) platform_device_register(&at91_cpuidle_device); - suspend_set_ops(&at91_pm_ops); + if (slow_clock) + suspend_set_ops(&at91_pm_ops); + else + pr_info("AT91: PM : Not supported, due to no sram allocated\n"); } void __init at91_rm9200_pm_init(void)