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[209.132.180.67]) by mx.google.com with ESMTP id l1-v6si4877403pgf.221.2018.05.14.01.56.46; Mon, 14 May 2018 01:56:46 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; dkim=pass header.i=@linaro.org header.s=google header.b=Z58Go2DS; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org; dmarc=pass (p=NONE sp=NONE dis=NONE) header.from=linaro.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752241AbeENI4p (ORCPT + 29 others); Mon, 14 May 2018 04:56:45 -0400 Received: from mail-pf0-f196.google.com ([209.85.192.196]:39051 "EHLO mail-pf0-f196.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752200AbeENI4n (ORCPT ); Mon, 14 May 2018 04:56:43 -0400 Received: by mail-pf0-f196.google.com with SMTP id a22-v6so5687014pfn.6 for ; Mon, 14 May 2018 01:56:42 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :in-reply-to:references; bh=sa47kacdk4A6CY2LuxKzGslqtwVkcT70aRUQGxEH/o8=; b=Z58Go2DSuMV96CW4zmQ+J7qs2jhHIMhS61FY2sQFtPVacrQSxtQ0JfDFJesMggVD/5 iJ9qEVCs+eFagH3FYHf4l0fYQKGeGOV+va2A4O0zyDLF6VEu3YHP3/kbkkxGXyUPHsbB MFIEMKk7kgoLWsX/FljjN2g2EpZOJ5Uw9jJwc= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:in-reply-to:references; bh=sa47kacdk4A6CY2LuxKzGslqtwVkcT70aRUQGxEH/o8=; b=pvscT28TxGpjDHGAT3Cmf1Z8r56OXNOVpGu9JVt5RiWI+xiC+TztSPfGhJjCknxVvj 7AATo51J+dSS5qf2isCnNFVzXcQwX6sIS3w3Ag4nsmJoaLeVGfuC7CveHIPQd/evocp5 D1tH8ZAy4BNzmDzgUIfjnXFdM9Xp4QbRabeZa4t9V/G3S+ca37AbQdMX3PB66MNtOePI imxOgXIE1U6B8q3FoDPJbCz3pWBRW/PJzR0qaygMsGwjZFXtFjfKn9dAvmlHDf+CTNLQ rWe0NGn8CPN8yqHH/afhQnRxZ6zLlXOYYgXAKvImDU5ppBtGiFnFWv198rF8VgD0BqqC 2kcg== X-Gm-Message-State: ALKqPwcr5sJdpMnGIcGsR4o9ZjZwawp9MHGpIrPNvO9S6JXkTo3715mw xu5Sb9In4s4dLaUBs/nIO7TVsA== X-Received: by 2002:a62:4387:: with SMTP id l7-v6mr9451965pfi.55.1526288202592; Mon, 14 May 2018 01:56:42 -0700 (PDT) Received: from baolinwangubtpc.spreadtrum.com ([117.18.48.102]) by smtp.gmail.com with ESMTPSA id x71-v6sm23308158pfe.47.2018.05.14.01.56.33 (version=TLS1 cipher=ECDHE-RSA-AES128-SHA bits=128/128); Mon, 14 May 2018 01:56:42 -0700 (PDT) From: Baolin Wang To: tglx@linutronix.de, john.stultz@linaro.org, daniel.lezcano@linaro.org, arnd@arndb.de, tony@atomide.com, aaro.koskinen@iki.fi, linux@armlinux.org.uk, mark.rutland@arm.com, marc.zyngier@arm.com Cc: baolin.wang@linaro.org, broonie@kernel.org, paulmck@linux.vnet.ibm.com, mlichvar@redhat.com, rdunlap@infradead.org, kstewart@linuxfoundation.org, gregkh@linuxfoundation.org, pombredanne@nexb.com, thierry.reding@gmail.com, jonathanh@nvidia.com, heiko@sntech.de, linus.walleij@linaro.org, viresh.kumar@linaro.org, mingo@kernel.org, hpa@zytor.com, peterz@infradead.org, douly.fnst@cn.fujitsu.com, len.brown@intel.com, rajvi.jingar@intel.com, alexandre.belloni@bootlin.com, x86@kernel.org, linux-arm-kernel@lists.infradead.org, linux-tegra@vger.kernel.org, linux-kernel@vger.kernel.org, linux-omap@vger.kernel.org Subject: [RFC PATCH 04/10] clocksource: tegra20_timer: Remove register_persistent_clock() API Date: Mon, 14 May 2018 16:55:30 +0800 Message-Id: X-Mailer: git-send-email 1.7.9.5 In-Reply-To: References: In-Reply-To: References: Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We will convert all drivers to use persistent clock framework to compensate the suspend time for OS time, instead of using the register_persistent_clock() API in ARM architecture. So this patch removes the register_persistent_clock() and implement its function to read persistent clock. Signed-off-by: Baolin Wang --- drivers/clocksource/tegra20_timer.c | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) -- 1.7.9.5 diff --git a/drivers/clocksource/tegra20_timer.c b/drivers/clocksource/tegra20_timer.c index c337a81..97a34cb 100644 --- a/drivers/clocksource/tegra20_timer.c +++ b/drivers/clocksource/tegra20_timer.c @@ -124,7 +124,7 @@ static u64 tegra_rtc_read_ms(void) } /* - * tegra_read_persistent_clock64 - Return time from a persistent clock. + * read_persistent_clock64 - Return time from a persistent clock. * * Reads the time from a source which isn't disabled during PM, the * 32k sync timer. Convert the cycles elapsed since last read into @@ -133,10 +133,16 @@ static u64 tegra_rtc_read_ms(void) * tegra_rtc driver could be executing to avoid race conditions * on the RTC shadow register */ -static void tegra_read_persistent_clock64(struct timespec64 *ts) +void read_persistent_clock64(struct timespec64 *ts) { u64 delta; + if (!rtc_base) { + ts->tv_sec = 0; + ts->tv_nsec = 0; + return; + } + last_persistent_ms = persistent_ms; persistent_ms = tegra_rtc_read_ms(); delta = persistent_ms - last_persistent_ms; @@ -259,6 +265,6 @@ static int __init tegra20_init_rtc(struct device_node *np) else clk_prepare_enable(clk); - return register_persistent_clock(NULL, tegra_read_persistent_clock64); + return 0; } TIMER_OF_DECLARE(tegra20_rtc, "nvidia,tegra20-rtc", tegra20_init_rtc);