From patchwork Thu Jan 2 06:36:28 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Samuel Holland X-Patchwork-Id: 213129 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-9.9 required=3.0 tests=DKIM_SIGNED,DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH, MAILING_LIST_MULTI, SIGNED_OFF_BY, SPF_HELO_NONE, SPF_PASS, USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 121F0C3276D for ; Thu, 2 Jan 2020 06:37:03 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id CEEF3217F4 for ; Thu, 2 Jan 2020 06:37:02 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=sholland.org header.i=@sholland.org header.b="jOERHjMZ"; dkim=pass (2048-bit key) header.d=messagingengine.com header.i=@messagingengine.com header.b="JpIWxztj" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726478AbgABGgh (ORCPT ); Thu, 2 Jan 2020 01:36:37 -0500 Received: from out2-smtp.messagingengine.com ([66.111.4.26]:38687 "EHLO out2-smtp.messagingengine.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726050AbgABGgg (ORCPT ); Thu, 2 Jan 2020 01:36:36 -0500 Received: from compute5.internal (compute5.nyi.internal [10.202.2.45]) by mailout.nyi.internal (Postfix) with ESMTP id 67F7D22022; Thu, 2 Jan 2020 01:36:35 -0500 (EST) Received: from mailfrontend1 ([10.202.2.162]) by compute5.internal (MEProxy); Thu, 02 Jan 2020 01:36:35 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sholland.org; h= from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; s=fm1; bh=5E2Z1B5s9ul8W sz8hqXds2n/amt1/rnEjWZTm6f4JAg=; b=jOERHjMZ1dJ1OnWoqqgRh1737sWot UsXSq8Lih7iVtzi125Vq2jTMNGEdWZkKWiansCnxSsFfKH0xRgrlPfWfKqCC/AXT vZrqzKDm8YWieWf95CCW0dgwMQuIRZ+1U9DV9MquCxpl9k0fNNy58dlsIlt5ml4E vySsyxHQEJXr+2i2jfre3mP9FXZcpyWlGzkjXCFcqsFK60/1EzN269m2nG/Sm2gr hoSvxTcb6Qr9Kyr7G3RPrsJC3MWjMtnAfEc1WuC527rapTTJ73CEmMDA8RTILZJq WiNRFO78fOQa7vY4Lowq0Xa7o0Y1mFAZT3UoofiLgGhMPi+ccK8j07yWA== DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d= messagingengine.com; h=cc:content-transfer-encoding:date:from :in-reply-to:message-id:mime-version:references:subject:to :x-me-proxy:x-me-proxy:x-me-sender:x-me-sender:x-sasl-enc; s= fm1; bh=5E2Z1B5s9ul8Wsz8hqXds2n/amt1/rnEjWZTm6f4JAg=; b=JpIWxztj y3huX+UkfJCVb78K6ZHD/UNSjnA1mU2XTygRERPKm+jNno92ORRKfcRPk8lHGGDr dcpK5qDGUmCxtI6W5zEcUe1hgZnrjdcA8Z9nTf7IJ6ZwHRL5FSXBLkXtgha/9u5G wfUX5QhoMGTZJcZcHAgagYosNggYwBvtRqY0BrdWiTeVxU6fz/cKdKm+HmpHT3ge u3t58TQASJw2JR6yo4dEW0iiCbJBEf/wXvcNqMO2nfYpPqDQAVWnRQRqvpnU9xrA QpwhWtsFQ/ejg3TVvM0vGqiMuoX4oEcnCZCzBBh+6Awc+FoRZQYzo8zWsjVa+oqp lzi4hefTmjy9zQ== X-ME-Sender: X-ME-Proxy-Cause: gggruggvucftvghtrhhoucdtuddrgedufedrvdegtddgledvucetufdoteggodetrfdotf fvucfrrhhofhhilhgvmecuhfgrshhtofgrihhlpdfqfgfvpdfurfetoffkrfgpnffqhgen uceurghilhhouhhtmecufedttdenucesvcftvggtihhpihgvnhhtshculddquddttddmne cujfgurhephffvufffkffojghfggfgsedtkeertdertddtnecuhfhrohhmpefurghmuhgv lhcujfholhhlrghnugcuoehsrghmuhgvlhesshhhohhllhgrnhgurdhorhhgqeenucfkph epjedtrddufeehrddugeekrdduhedunecurfgrrhgrmhepmhgrihhlfhhrohhmpehsrghm uhgvlhesshhhohhllhgrnhgurdhorhhgnecuvehluhhsthgvrhfuihiivgeptd X-ME-Proxy: Received: from titanium.stl.sholland.net (70-135-148-151.lightspeed.stlsmo.sbcglobal.net [70.135.148.151]) by mail.messagingengine.com (Postfix) with ESMTPA id D775080059; Thu, 2 Jan 2020 01:36:34 -0500 (EST) From: Samuel Holland To: Chen-Yu Tsai , Sebastian Reichel Cc: linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org, linux-sunxi@googlegroups.com, Samuel Holland Subject: [PATCH 2/7] power: supply: axp20x_ac_power: Add wakeup control Date: Thu, 2 Jan 2020 00:36:28 -0600 Message-Id: <20200102063633.65388-2-samuel@sholland.org> X-Mailer: git-send-email 2.23.0 In-Reply-To: <20200102063633.65388-1-samuel@sholland.org> References: <20200102063633.65388-1-samuel@sholland.org> MIME-Version: 1.0 Sender: linux-pm-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org The AC power supply input can be used as a wakeup source. Hook up the ACIN_PLUGIN IRQ to trigger wakeup based on userspace configuration. To do this, we must remember the list of IRQs for the life of the device. To know how much space to allocate for the flexible array member, we switch from using a NULL sentinel to using an array length. Because we now depend on the specific order of the IRQs (we assume ACIN_PLUGIN is first and always present), failing to acquire an IRQ during probe must be a fatal error. To avoid spuriously waking up the system when the USB power supply is not configured as a wakeup source, we must explicitly disable all non- wake IRQs during system suspend. This is because the SoC's NMI input is shared among all IRQs on the AXP PMIC. Due to the use of regmap-irq, the individual IRQs within the PMIC are nested threaded interrupts, and are therefore not automatically disabled during system suspend. The upshot is that if any other device within the MFD (such as the power key) is an enabled wakeup source, all enabled IRQs within the PMIC will cause wakeup. We still need to call enable_irq_wake() when we *do* want wakeup, in case those other wakeup sources on the PMIC are all disabled. Signed-off-by: Samuel Holland --- drivers/power/supply/axp20x_ac_power.c | 103 +++++++++++++++++++------ 1 file changed, 80 insertions(+), 23 deletions(-) diff --git a/drivers/power/supply/axp20x_ac_power.c b/drivers/power/supply/axp20x_ac_power.c index 4410e7b89383..6f172cc62826 100644 --- a/drivers/power/supply/axp20x_ac_power.c +++ b/drivers/power/supply/axp20x_ac_power.c @@ -15,6 +15,7 @@ #include #include #include +#include #include #include #include @@ -42,6 +43,8 @@ struct axp20x_ac_power { struct power_supply *supply; struct iio_channel *acin_v; struct iio_channel *acin_i; + unsigned int num_irqs; + unsigned int irqs[]; }; static irqreturn_t axp20x_ac_power_irq(int irq, void *devid) @@ -229,34 +232,82 @@ static const struct power_supply_desc axp813_ac_power_desc = { .set_property = axp813_ac_power_set_property, }; +static const char * const axp20x_irq_names[] = { + "ACIN_PLUGIN", + "ACIN_REMOVAL", +}; + struct axp_data { const struct power_supply_desc *power_desc; + const char * const *irq_names; + unsigned int num_irq_names; bool acin_adc; }; static const struct axp_data axp20x_data = { - .power_desc = &axp20x_ac_power_desc, - .acin_adc = true, + .power_desc = &axp20x_ac_power_desc, + .irq_names = axp20x_irq_names, + .num_irq_names = ARRAY_SIZE(axp20x_irq_names), + .acin_adc = true, }; static const struct axp_data axp22x_data = { - .power_desc = &axp22x_ac_power_desc, - .acin_adc = false, + .power_desc = &axp22x_ac_power_desc, + .irq_names = axp20x_irq_names, + .num_irq_names = ARRAY_SIZE(axp20x_irq_names), + .acin_adc = false, }; static const struct axp_data axp813_data = { - .power_desc = &axp813_ac_power_desc, - .acin_adc = false, + .power_desc = &axp813_ac_power_desc, + .irq_names = axp20x_irq_names, + .num_irq_names = ARRAY_SIZE(axp20x_irq_names), + .acin_adc = false, }; +#if CONFIG_PM_SLEEP +static int axp20x_ac_power_suspend(struct device *dev) +{ + struct axp20x_ac_power *power = dev_get_drvdata(dev); + int i = 0; + + /* + * Allow wake via ACIN_PLUGIN only. + * + * As nested threaded IRQs are not automatically disabled during + * suspend, we must explicitly disable the remainder of the IRQs. + */ + if (device_may_wakeup(&power->supply->dev)) + enable_irq_wake(power->irqs[i++]); + while (i < power->num_irqs) + disable_irq(power->irqs[i++]); + + return 0; +} + +static int axp20x_ac_power_resume(struct device *dev) +{ + struct axp20x_ac_power *power = dev_get_drvdata(dev); + int i = 0; + + if (device_may_wakeup(&power->supply->dev)) + disable_irq_wake(power->irqs[i++]); + while (i < power->num_irqs) + enable_irq(power->irqs[i++]); + + return 0; +} +#endif + +static SIMPLE_DEV_PM_OPS(axp20x_ac_power_pm_ops, axp20x_ac_power_suspend, + axp20x_ac_power_resume); + static int axp20x_ac_power_probe(struct platform_device *pdev) { struct axp20x_dev *axp20x = dev_get_drvdata(pdev->dev.parent); struct power_supply_config psy_cfg = {}; struct axp20x_ac_power *power; const struct axp_data *axp_data; - static const char * const irq_names[] = { "ACIN_PLUGIN", "ACIN_REMOVAL", - NULL }; int i, irq, ret; if (!of_device_is_available(pdev->dev.of_node)) @@ -267,12 +318,14 @@ static int axp20x_ac_power_probe(struct platform_device *pdev) return -EINVAL; } - power = devm_kzalloc(&pdev->dev, sizeof(*power), GFP_KERNEL); + axp_data = of_device_get_match_data(&pdev->dev); + + power = devm_kzalloc(&pdev->dev, + struct_size(power, irqs, axp_data->num_irq_names), + GFP_KERNEL); if (!power) return -ENOMEM; - axp_data = of_device_get_match_data(&pdev->dev); - if (axp_data->acin_adc) { power->acin_v = devm_iio_channel_get(&pdev->dev, "acin_v"); if (IS_ERR(power->acin_v)) { @@ -290,6 +343,7 @@ static int axp20x_ac_power_probe(struct platform_device *pdev) } power->regmap = dev_get_regmap(pdev->dev.parent, NULL); + power->num_irqs = axp_data->num_irq_names; platform_set_drvdata(pdev, power); @@ -303,20 +357,22 @@ static int axp20x_ac_power_probe(struct platform_device *pdev) return PTR_ERR(power->supply); /* Request irqs after registering, as irqs may trigger immediately */ - for (i = 0; irq_names[i]; i++) { - irq = platform_get_irq_byname(pdev, irq_names[i]); + for (i = 0; i < axp_data->num_irq_names; i++) { + irq = platform_get_irq_byname(pdev, axp_data->irq_names[i]); if (irq < 0) { - dev_warn(&pdev->dev, "No IRQ for %s: %d\n", - irq_names[i], irq); - continue; + dev_err(&pdev->dev, "No IRQ for %s: %d\n", + axp_data->irq_names[i], irq); + return irq; } - irq = regmap_irq_get_virq(axp20x->regmap_irqc, irq); - ret = devm_request_any_context_irq(&pdev->dev, irq, + power->irqs[i] = regmap_irq_get_virq(axp20x->regmap_irqc, irq); + ret = devm_request_any_context_irq(&pdev->dev, power->irqs[i], axp20x_ac_power_irq, 0, DRVNAME, power); - if (ret < 0) - dev_warn(&pdev->dev, "Error requesting %s IRQ: %d\n", - irq_names[i], ret); + if (ret < 0) { + dev_err(&pdev->dev, "Error requesting %s IRQ: %d\n", + axp_data->irq_names[i], ret); + return ret; + } } return 0; @@ -339,8 +395,9 @@ MODULE_DEVICE_TABLE(of, axp20x_ac_power_match); static struct platform_driver axp20x_ac_power_driver = { .probe = axp20x_ac_power_probe, .driver = { - .name = DRVNAME, - .of_match_table = axp20x_ac_power_match, + .name = DRVNAME, + .of_match_table = axp20x_ac_power_match, + .pm = &axp20x_ac_power_pm_ops, }, };