From patchwork Fri Sep 2 13:17:17 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Marc Gonzalez X-Patchwork-Id: 9311025 X-Patchwork-Delegate: rui.zhang@intel.com Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 91595607D2 for ; Fri, 2 Sep 2016 13:36:26 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 8240429765 for ; Fri, 2 Sep 2016 13:36:26 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 76ECE297A5; Fri, 2 Sep 2016 13:36:26 +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=-6.9 required=2.0 tests=BAYES_00,RCVD_IN_DNSWL_HI autolearn=unavailable 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 4A90129765 for ; Fri, 2 Sep 2016 13:36:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932169AbcIBNgP (ORCPT ); Fri, 2 Sep 2016 09:36:15 -0400 Received: from a.mx.sdesigns.eu ([78.31.43.6]:9529 "EHLO a.mx.sdesigns.eu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752929AbcIBNgN (ORCPT ); Fri, 2 Sep 2016 09:36:13 -0400 X-Greylist: delayed 1130 seconds by postgrey-1.27 at vger.kernel.org; Fri, 02 Sep 2016 09:36:13 EDT Received: from [172.27.0.114] (summerrain.france.sdesigns.com [172.27.0.114]) by hibou.france.sdesigns.com (Postfix) with ESMTP id 5FADD1C10B3; Fri, 2 Sep 2016 15:17:20 +0200 (CEST) From: Marc Gonzalez Subject: [PATCH v4] thermal: tango: add resume support To: Eduardo Valentin , Zhang Rui Cc: linux-pm , Linux ARM , Kevin Hilman , Sebastian Frias , Thierry Reding , Arnd Bergmann , Mason References: <57726196.5060909@free.fr> Message-ID: <57C97BDD.4030101@sigmadesigns.com> Date: Fri, 2 Sep 2016 15:17:17 +0200 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:43.0) Gecko/20100101 Firefox/43.0 SeaMonkey/2.40 MIME-Version: 1.0 In-Reply-To: <57726196.5060909@free.fr> Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP When this platform is suspended, firmware powers the entire SoC down, except a few hardware blocks waiting for wakeup events. There is no context to save for this particular block. Therefore, there is nothing useful for the driver to do on suspend; so we define a NULL suspend hook. On resume, the driver initializes the block exactly as is done in the probe callback. Signed-off-by: Marc Gonzalez Reviewed-by: Kevin Hilman --- Earlier versions of this patch were reviewed by Kevin and Thierry. The current form is preferred by Arnd. --- drivers/thermal/tango_thermal.c | 19 +++++++++++++++++-- 1 file changed, 17 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/tango_thermal.c b/drivers/thermal/tango_thermal.c index 70e0d9f406e9..201304aeafeb 100644 --- a/drivers/thermal/tango_thermal.c +++ b/drivers/thermal/tango_thermal.c @@ -64,6 +64,12 @@ static const struct thermal_zone_of_device_ops ops = { .get_temp = tango_get_temp, }; +static void tango_thermal_init(struct tango_thermal_priv *priv) +{ + writel(0, priv->base + TEMPSI_CFG); + writel(CMD_ON, priv->base + TEMPSI_CMD); +} + static int tango_thermal_probe(struct platform_device *pdev) { struct resource *res; @@ -79,14 +85,22 @@ static int tango_thermal_probe(struct platform_device *pdev) if (IS_ERR(priv->base)) return PTR_ERR(priv->base); + platform_set_drvdata(pdev, priv); priv->thresh_idx = IDX_MIN; - writel(0, priv->base + TEMPSI_CFG); - writel(CMD_ON, priv->base + TEMPSI_CMD); + tango_thermal_init(priv); tzdev = devm_thermal_zone_of_sensor_register(&pdev->dev, 0, priv, &ops); return PTR_ERR_OR_ZERO(tzdev); } +static int __maybe_unused tango_thermal_resume(struct device *dev) +{ + tango_thermal_init(dev_get_drvdata(dev)); + return 0; +} + +static SIMPLE_DEV_PM_OPS(tango_thermal_pm, NULL, tango_thermal_resume); + static const struct of_device_id tango_sensor_ids[] = { { .compatible = "sigma,smp8758-thermal", @@ -99,6 +113,7 @@ static struct platform_driver tango_thermal_driver = { .driver = { .name = "tango-thermal", .of_match_table = tango_sensor_ids, + .pm = &tango_thermal_pm, }, };