From patchwork Thu Feb 25 16:33:20 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Andy Shevchenko X-Patchwork-Id: 387906 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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, URIBL_BLOCKED, USER_AGENT_GIT autolearn=ham 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 89599C4332B for ; Thu, 25 Feb 2021 16:35:30 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 589C564E83 for ; Thu, 25 Feb 2021 16:35:30 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232473AbhBYQf2 (ORCPT ); Thu, 25 Feb 2021 11:35:28 -0500 Received: from mga11.intel.com ([192.55.52.93]:64509 "EHLO mga11.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229548AbhBYQfZ (ORCPT ); Thu, 25 Feb 2021 11:35:25 -0500 IronPort-SDR: 9MROr3sVW4uVNbMPfjENwq3SDhrTbZZsTpOUBTXjD4anoCv4HzU5048n0ZC1lKn0E8dWlda7NA n4nonc9ldwng== X-IronPort-AV: E=McAfee;i="6000,8403,9906"; a="182156002" X-IronPort-AV: E=Sophos;i="5.81,206,1610438400"; d="scan'208";a="182156002" Received: from fmsmga003.fm.intel.com ([10.253.24.29]) by fmsmga102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 25 Feb 2021 08:33:37 -0800 IronPort-SDR: fjDB3eGn2eE2JeLHekf1/qYF0tXgnHKtLDmvwTwVZZuQzwWsKi7fKvdtZDv9eVy1BTbJqg+Uu2 /v3DPK/LO3TQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.81,206,1610438400"; d="scan'208";a="432360281" Received: from black.fi.intel.com ([10.237.72.28]) by FMSMGA003.fm.intel.com with ESMTP; 25 Feb 2021 08:33:34 -0800 Received: by black.fi.intel.com (Postfix, from userid 1003) id 10DA854A; Thu, 25 Feb 2021 18:33:34 +0200 (EET) From: Andy Shevchenko To: Andy Shevchenko , Bartosz Golaszewski , Mika Westerberg , Linus Walleij , linux-gpio@vger.kernel.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Cc: "Rafael J. Wysocki" , Len Brown Subject: [PATCH v1 3/3] gpio: pca953x: Set IRQ type when handle Intel Galileo Gen 2 Date: Thu, 25 Feb 2021 18:33:20 +0200 Message-Id: <20210225163320.71267-4-andriy.shevchenko@linux.intel.com> X-Mailer: git-send-email 2.30.0 In-Reply-To: <20210225163320.71267-1-andriy.shevchenko@linux.intel.com> References: <20210225163320.71267-1-andriy.shevchenko@linux.intel.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org The commit 0ea683931adb ("gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip") indeliberately made a regression on how IRQ line from GPIO I²C expander is handled. I.e. it reveals that the quirk for Intel Galileo Gen 2 misses the part of setting IRQ type which previously was predefined by gpio-dwapb driver. Now, we have to reorganize the approach to call necessary parts, which can be done via ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER quirk. Without this fix and with above mentioned change the kernel hangs on the first IRQ event with: gpio gpiochip3: Persistence not supported for GPIO 1 irq 32, desc: 62f8fb50, depth: 0, count: 0, unhandled: 0 ->handle_irq(): 41c7b0ab, handle_bad_irq+0x0/0x40 ->irq_data.chip(): e03f1e72, 0xc2539218 ->action(): 0ecc7e6f ->action->handler(): 8a3db21e, irq_default_primary_handler+0x0/0x10 IRQ_NOPROBE set unexpected IRQ trap at vector 20 Fixes: ba8c90c61847 ("gpio: pca953x: Override IRQ for one of the expanders on Galileo Gen 2") Depends-on: 0ea683931adb ("gpio: dwapb: Convert driver to using the GPIO-lib-based IRQ-chip") Signed-off-by: Andy Shevchenko Reviewed-by: Linus Walleij --- drivers/gpio/gpio-pca953x.c | 78 +++++++++++-------------------------- 1 file changed, 23 insertions(+), 55 deletions(-) diff --git a/drivers/gpio/gpio-pca953x.c b/drivers/gpio/gpio-pca953x.c index 825b362eb4b7..6898c27f71f8 100644 --- a/drivers/gpio/gpio-pca953x.c +++ b/drivers/gpio/gpio-pca953x.c @@ -112,8 +112,29 @@ MODULE_DEVICE_TABLE(i2c, pca953x_id); #ifdef CONFIG_GPIO_PCA953X_IRQ #include -#include -#include + +static const struct acpi_gpio_params pca953x_irq_gpios = { 0, 0, true }; + +static const struct acpi_gpio_mapping pca953x_acpi_irq_gpios[] = { + { "irq-gpios", &pca953x_irq_gpios, 1, ACPI_GPIO_QUIRK_ABSOLUTE_NUMBER }, + { } +}; + +static int pca953x_acpi_get_irq(struct device *dev) +{ + int ret; + + ret = devm_acpi_dev_add_driver_gpios(dev, pca953x_acpi_irq_gpios); + if (ret) + dev_warn(dev, "can't add GPIO ACPI mapping\n"); + + ret = acpi_dev_gpio_irq_get_by(ACPI_COMPANION(dev), "irq-gpios", 0); + if (ret < 0) + return ret; + + dev_info(dev, "ACPI interrupt quirk (IRQ %d)\n", ret); + return ret; +} static const struct dmi_system_id pca953x_dmi_acpi_irq_info[] = { { @@ -132,59 +153,6 @@ static const struct dmi_system_id pca953x_dmi_acpi_irq_info[] = { }, {} }; - -#ifdef CONFIG_ACPI -static int pca953x_acpi_get_pin(struct acpi_resource *ares, void *data) -{ - struct acpi_resource_gpio *agpio; - int *pin = data; - - if (acpi_gpio_get_irq_resource(ares, &agpio)) - *pin = agpio->pin_table[0]; - return 1; -} - -static int pca953x_acpi_find_pin(struct device *dev) -{ - struct acpi_device *adev = ACPI_COMPANION(dev); - int pin = -ENOENT, ret; - LIST_HEAD(r); - - ret = acpi_dev_get_resources(adev, &r, pca953x_acpi_get_pin, &pin); - acpi_dev_free_resource_list(&r); - if (ret < 0) - return ret; - - return pin; -} -#else -static inline int pca953x_acpi_find_pin(struct device *dev) { return -ENXIO; } -#endif - -static int pca953x_acpi_get_irq(struct device *dev) -{ - int pin, ret; - - pin = pca953x_acpi_find_pin(dev); - if (pin < 0) - return pin; - - dev_info(dev, "Applying ACPI interrupt quirk (GPIO %d)\n", pin); - - if (!gpio_is_valid(pin)) - return -EINVAL; - - ret = gpio_request(pin, "pca953x interrupt"); - if (ret) - return ret; - - ret = gpio_to_irq(pin); - - /* When pin is used as an IRQ, no need to keep it requested */ - gpio_free(pin); - - return ret; -} #endif static const struct acpi_device_id pca953x_acpi_ids[] = {