From mboxrd@z Thu Jan 1 00:00:00 1970 From: Mason Subject: [PATCH v2] thermal: tango: add resume support Date: Tue, 21 Jun 2016 11:05:38 +0200 Message-ID: <57690362.2000706@free.fr> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-15 Content-Transfer-Encoding: 7bit Return-path: Received: from smtpfb1-g21.free.fr ([212.27.42.9]:50683 "EHLO smtpfb1-g21.free.fr" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750731AbcFUJRI (ORCPT ); Tue, 21 Jun 2016 05:17:08 -0400 Received: from smtp2-g21.free.fr (smtp2-g21.free.fr [212.27.42.2]) by smtpfb1-g21.free.fr (Postfix) with ESMTP id B9EE82DD0C for ; Tue, 21 Jun 2016 11:06:55 +0200 (CEST) Sender: linux-pm-owner@vger.kernel.org List-Id: linux-pm@vger.kernel.org To: Eduardo Valentin , Zhang Rui Cc: linux-pm , "Rafael J. Wysocki" , Kevin Hilman , Sebastian Frias From: Marc Gonzalez When this platform is suspended, firmware powers the entire SoC down, except a few hardware blocks waiting for wakeup events. And 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 --- drivers/thermal/tango_thermal.c | 27 +++++++++++++++++++++++++-- 1 file changed, 25 insertions(+), 2 deletions(-) diff --git a/drivers/thermal/tango_thermal.c b/drivers/thermal/tango_thermal.c index 70e0d9f406e9..d571ce2f546d 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 +85,30 @@ 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); } +#ifdef CONFIG_PM_SLEEP +static int tango_thermal_resume(struct device *dev) +{ + struct tango_thermal_priv *priv = dev_get_drvdata(dev); + tango_thermal_init(priv); + + return 0; +} + +static SIMPLE_DEV_PM_OPS(tango_thermal_pm, NULL, tango_thermal_resume); + +#define DEV_PM_OPS &tango_thermal_pm +#else +#define DEV_PM_OPS NULL +#endif + static const struct of_device_id tango_sensor_ids[] = { { .compatible = "sigma,smp8758-thermal", @@ -99,6 +121,7 @@ static struct platform_driver tango_thermal_driver = { .driver = { .name = "tango-thermal", .of_match_table = tango_sensor_ids, + .pm = DEV_PM_OPS, }, }; -- 2.8.2