From patchwork Fri Dec 21 11:59:45 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Raju P.L.S.S.S.N" X-Patchwork-Id: 10740351 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 1F12A14DE for ; Fri, 21 Dec 2018 12:00:49 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 0E1AF286D1 for ; Fri, 21 Dec 2018 12:00:49 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 01E92286FE; Fri, 21 Dec 2018 12:00:48 +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=-7.2 required=2.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,FROM_LOCAL_NOVOWEL,MAILING_LIST_MULTI,RCVD_IN_DNSWL_HI 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 D4C73286D1 for ; Fri, 21 Dec 2018 12:00:47 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2390204AbeLUMAr (ORCPT ); Fri, 21 Dec 2018 07:00:47 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:39592 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1732607AbeLUMAq (ORCPT ); Fri, 21 Dec 2018 07:00:46 -0500 Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 318D1609C4; Fri, 21 Dec 2018 12:00:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1545393645; bh=C2cgUDhNcCSdOqOs+pZCrHy3sHt4moe9OIisEtb/lVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=UR7Sn3JKwzDPdXWv4TeI3rLwTjrrmmqi7UicZPou5hTEd4OguWTWCXs/C08EbPcvG jREEhRncGa/o2wp/VMKR6ZHY+R3dogb+uEbnMygiJE5PMqWBGEGOilw/6q0cIZB3d9 OpO6pN2+JQ3tmlSCfhYoi+4AcHPk5fQ1mf355X2k= Received: from rplsssn-linux.qualcomm.com (blr-c-bdr-fw-01_globalnat_allzones-outside.qualcomm.com [103.229.19.19]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) (Authenticated sender: rplsssn@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 25599609C2; Fri, 21 Dec 2018 12:00:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=codeaurora.org; s=default; t=1545393642; bh=C2cgUDhNcCSdOqOs+pZCrHy3sHt4moe9OIisEtb/lVk=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=OlkaJJe7z155K0Zm5AiG7WQ5lTXjN3bJVs6Rz8MMJWAhnAFhFkrtEMQAylsNg1ZoQ nSoq/how8Er4x/G5/2eei20INTwizGfgmp6kGwUbZ2glqedv7J8l01Z6KUpE2XZhU7 IDWB5mcpHdvlq+fkZO4/fnuCVDCBhyP0bTVNqIaY= DMARC-Filter: OpenDMARC Filter v1.3.2 smtp.codeaurora.org 25599609C2 Authentication-Results: pdx-caf-mail.web.codeaurora.org; dmarc=none (p=none dis=none) header.from=codeaurora.org Authentication-Results: pdx-caf-mail.web.codeaurora.org; spf=none smtp.mailfrom=rplsssn@codeaurora.org From: "Raju P.L.S.S.S.N" To: andy.gross@linaro.org, david.brown@linaro.org, linux-arm-msm@vger.kernel.org, linux-soc@vger.kernel.org Cc: rnayak@codeaurora.org, bjorn.andersson@linaro.org, linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org, sboyd@kernel.org, evgreen@chromium.org, dianders@chromium.org, mka@chromium.org, ilina@codeaurora.org, "Raju P.L.S.S.S.N" Subject: [PATCH RFC 4/5] drivers: qcom: rpmh-pdc-timer: Add power management ops Date: Fri, 21 Dec 2018 17:29:45 +0530 Message-Id: <20181221115946.10095-5-rplsssn@codeaurora.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20181221115946.10095-1-rplsssn@codeaurora.org> References: <20181221115946.10095-1-rplsssn@codeaurora.org> MIME-Version: 1.0 Sender: linux-arm-msm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-arm-msm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP Add suspend power management ops so that the PDC timer is programmed to highest match value when system is suspended. Signed-off-by: Raju P.L.S.S.S.N --- drivers/soc/qcom/Kconfig | 2 +- drivers/soc/qcom/rpmh-pdc-timer.c | 24 ++++++++++++++++++++++++ 2 files changed, 25 insertions(+), 1 deletion(-) diff --git a/drivers/soc/qcom/Kconfig b/drivers/soc/qcom/Kconfig index d04724ea5490..c6ef41a06c97 100644 --- a/drivers/soc/qcom/Kconfig +++ b/drivers/soc/qcom/Kconfig @@ -105,7 +105,7 @@ config QCOM_RPMH config QCOM_RPMH_PDC_TIMER bool "Qualcomm PDC Timer for RPM-Hardened based SoCs" - depends on CPU_PM + depends on CPU_PM && PM_SLEEP help Support for QCOM platform next wakeup timer programming when application processor enters SoC level deepest low power mode. diff --git a/drivers/soc/qcom/rpmh-pdc-timer.c b/drivers/soc/qcom/rpmh-pdc-timer.c index 108ea4a2df89..ebb643924a3e 100644 --- a/drivers/soc/qcom/rpmh-pdc-timer.c +++ b/drivers/soc/qcom/rpmh-pdc-timer.c @@ -23,6 +23,7 @@ static resource_size_t cmd0_data_offset; static resource_size_t cmd1_data_offset; static uint64_t pdc_wakeup = ~0ULL; static raw_spinlock_t pdc_wakeup_lock; +static int suspended; /* convert micro sec to ticks or clock cycles * @@ -102,6 +103,9 @@ static int cpu_pm_notifier(struct notifier_block *b, { uint64_t cpu_next_wakeup; + if (suspended) + return NOTIFY_DONE; + switch (cmd) { case CPU_PM_ENTER: cpu_next_wakeup = get_next_wakeup_cycles(smp_processor_id()); @@ -130,6 +134,25 @@ static struct notifier_block cpu_pm_notifier_block = { .priority = -1, /* Should be last in the order of notifications */ }; +static int pdc_timer_suspend(struct device *dev) +{ + suspended = true; + raw_spin_lock(&pdc_wakeup_lock); + pdc_wakeup = ~0ULL; + setup_pdc_wakeup_timer(pdc_wakeup); + raw_spin_unlock(&pdc_wakeup_lock); + return 0; +} + +static int pdc_timer_resume(struct device *dev) +{ + suspended = false; + return 0; +} +static const struct dev_pm_ops pdc_timer_dev_pm_ops = { + SET_NOIRQ_SYSTEM_SLEEP_PM_OPS(pdc_timer_suspend, pdc_timer_resume) +}; + static int pdc_timer_probe(struct platform_device *pdev) { struct device *pdc_timer_dev = &pdev->dev; @@ -176,6 +199,7 @@ static struct platform_driver pdc_timer_driver = { .driver = { .name = KBUILD_MODNAME, .of_match_table = pdc_timer_drv_match, + .pm = &pdc_timer_dev_pm_ops, }, }; builtin_platform_driver(pdc_timer_driver);