From patchwork Wed Dec 20 23:54:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Mark Hasemeyer X-Patchwork-Id: 756636 Received: from mail-il1-f171.google.com (mail-il1-f171.google.com [209.85.166.171]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 5EDBE4B5A4 for ; Wed, 20 Dec 2023 23:55:09 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=chromium.org Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=chromium.org Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=chromium.org header.i=@chromium.org header.b="RFbvA5Xq" Received: by mail-il1-f171.google.com with SMTP id e9e14a558f8ab-35fceb46c5fso672905ab.0 for ; Wed, 20 Dec 2023 15:55:09 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1703116508; x=1703721308; darn=vger.kernel.org; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date :message-id:reply-to; bh=J4PHO7Jw/IWJrb0Mf1SLe4BFSupAlBrmRHdwYgRla00=; b=RFbvA5XqAwcl+y2f/yvdDqW4T70wVF4nPS/ukZQErT+rodUh9LH/azDIrv5siBKYnp 0aIbFWPqjYZBjOWWydoyQTT7Y0ocsxLXC3J1rmZ6xebUMXDiUOYu3oKJRggCll2e6cJ7 /zGPXZCH/b3SsQMO7NK639rk79lMl4Ao0Nd9U= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1703116508; x=1703721308; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=J4PHO7Jw/IWJrb0Mf1SLe4BFSupAlBrmRHdwYgRla00=; b=hixOPMgJdTdWQHaq/xqDtZshLs5oJc4rqZ2dVMssUNgmGsILkDNmCEZtd1yFCKCK4g qX2Skk5XUweaZgRqL6HQFuCjUH8Uy0bb/9M1JVc98pZzmgiv85uE7PknPto1ROKThvCZ h758O0DRB9mytalBtuwFGXi8LXA+7RDt2Rc5TAnLfz3eWHvvSd1oX8zaxnXLnJLPd+Qq cQABL3rFXXoM2Om8rQIzQmR0Q7tiJXlu2/Q7dR7fm7YuTqnZxN6dN1mu/xhx3CPwVsd9 idTp6HT+lhc+nHo3yQ/FpcjVrV0l0wIDWv8YNMT69N03RoPUbEaz4cwlyrmw0X3LQDxq ajig== X-Gm-Message-State: AOJu0Yx9x+I+33te1Qu92OzpJM0Et8f/tqH3VYV6S0uiKaFHHGTfBR5G k/my6ntO0dgA9PVkaphG3XlWWhMO+FbQ X-Google-Smtp-Source: AGHT+IH2lTPGo2WEeRiZiIJrzCSOk2a8rUTZziZgBwUnQ/vrtMNeRF1WZyCgr0C+c1ZFnu0ife2BGw== X-Received: by 2002:a05:6e02:154d:b0:35d:59b3:2f87 with SMTP id j13-20020a056e02154d00b0035d59b32f87mr2865766ilu.28.1703116508461; Wed, 20 Dec 2023 15:55:08 -0800 (PST) Received: from markhas1.lan (71-218-50-136.hlrn.qwest.net. [71.218.50.136]) by smtp.gmail.com with ESMTPSA id bp22-20020a056638441600b0046b39a6f404sm177805jab.17.2023.12.20.15.55.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 20 Dec 2023 15:55:08 -0800 (PST) From: Mark Hasemeyer To: LKML Cc: AngeloGioacchino Del Regno , Krzysztof Kozlowski , Tzung-Bi Shih , Raul Rangel , Konrad Dybcio , Andy Shevchenko , Rob Herring , Sudeep Holla , Mark Hasemeyer , Andy Shevchenko , Bartosz Golaszewski , Len Brown , Linus Walleij , Mika Westerberg , "Rafael J. Wysocki" , Wolfram Sang , linux-acpi@vger.kernel.org, linux-gpio@vger.kernel.org, linux-i2c@vger.kernel.org Subject: [PATCH v2 01/22] gpiolib: acpi: Modify acpi_dev_irq_wake_get_by() to use resource Date: Wed, 20 Dec 2023 16:54:15 -0700 Message-ID: <20231220165423.v2.1.Ifd0903f1c351e84376d71dbdadbd43931197f5ea@changeid> X-Mailer: git-send-email 2.43.0.472.g3155946c3a-goog In-Reply-To: <20231220235459.2965548-1-markhas@chromium.org> References: <20231220235459.2965548-1-markhas@chromium.org> Precedence: bulk X-Mailing-List: linux-gpio@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Other information besides wake capability can be provided about GPIO IRQs such as triggering, polarity, and sharability. Use resource flags to provide this information to the caller if they want it. This should keep the API more robust over time as flags are added, modified, or removed. It also more closely matches acpi_irq_get() which take a resource as an argument. Rename the function to acpi_dev_get_gpio_irq_resource() to better describe the function's new behavior. Signed-off-by: Mark Hasemeyer --- Changes in v2: -Remove explicit cast to struct resource -irq -> IRQ drivers/gpio/gpiolib-acpi.c | 25 ++++++++++++++++--------- drivers/i2c/i2c-core-acpi.c | 10 ++++++++-- include/linux/acpi.h | 23 ++++++++++------------- 3 files changed, 34 insertions(+), 24 deletions(-) diff --git a/drivers/gpio/gpiolib-acpi.c b/drivers/gpio/gpiolib-acpi.c index 88066826d8e5b..ef98b50f42f86 100644 --- a/drivers/gpio/gpiolib-acpi.c +++ b/drivers/gpio/gpiolib-acpi.c @@ -111,6 +111,7 @@ struct acpi_gpio_info { int polarity; int triggering; bool wake_capable; + bool shareable; unsigned int debounce; unsigned int quirks; }; @@ -760,6 +761,7 @@ static int acpi_populate_gpio_lookup(struct acpi_resource *ares, void *data) lookup->info.debounce = agpio->debounce_timeout; lookup->info.gpioint = gpioint; lookup->info.wake_capable = acpi_gpio_irq_is_wake(&lookup->info.adev->dev, agpio); + lookup->info.shareable = agpio->shareable == ACPI_SHARED; /* * Polarity and triggering are only specified for GpioInt @@ -1004,11 +1006,11 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode, } /** - * acpi_dev_gpio_irq_wake_get_by() - Find GpioInt and translate it to Linux IRQ number + * acpi_dev_get_gpio_irq_resource() - Find GpioInt and populate resource struct * @adev: pointer to a ACPI device to get IRQ from * @name: optional name of GpioInt resource * @index: index of GpioInt resource (starting from %0) - * @wake_capable: Set to true if the IRQ is wake capable + * @r: pointer to resource to populate with IRQ information. * * If the device has one or more GpioInt resources, this function can be * used to translate from the GPIO offset in the resource to the Linux IRQ @@ -1023,10 +1025,12 @@ struct gpio_desc *acpi_find_gpio(struct fwnode_handle *fwnode, * The GPIO is considered wake capable if the GpioInt resource specifies * SharedAndWake or ExclusiveAndWake. * - * Return: Linux IRQ number (> %0) on success, negative errno on failure. + * IRQ number will be available in the resource structure. + * + * Return: 0 on success, negative errno on failure. */ -int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index, - bool *wake_capable) +int acpi_dev_get_gpio_irq_resource(struct acpi_device *adev, const char *name, int index, + struct resource *r) { int idx, i; unsigned int irq_flags; @@ -1084,16 +1088,19 @@ int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, in } /* avoid suspend issues with GPIOs when systems are using S3 */ - if (wake_capable && acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0) - *wake_capable = info.wake_capable; + if (info.wake_capable && !(acpi_gbl_FADT.flags & ACPI_FADT_LOW_POWER_S0)) + info.wake_capable = false; - return irq; + *r = DEFINE_RES_IRQ(irq); + r->flags = acpi_dev_irq_flags(info.triggering, info.polarity, + info.shareable, info.wake_capable); + return 0; } } return -ENOENT; } -EXPORT_SYMBOL_GPL(acpi_dev_gpio_irq_wake_get_by); +EXPORT_SYMBOL_GPL(acpi_dev_get_gpio_irq_resource); static acpi_status acpi_gpio_adr_space_handler(u32 function, acpi_physical_address address, diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index d6037a3286690..8126a87baf3d4 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -203,6 +203,7 @@ int i2c_acpi_get_irq(struct i2c_client *client, bool *wake_capable) { struct acpi_device *adev = ACPI_COMPANION(&client->dev); struct list_head resource_list; + struct resource irqres; struct i2c_acpi_irq_context irq_ctx = { .irq = -ENOENT, }; @@ -217,8 +218,13 @@ int i2c_acpi_get_irq(struct i2c_client *client, bool *wake_capable) acpi_dev_free_resource_list(&resource_list); - if (irq_ctx.irq == -ENOENT) - irq_ctx.irq = acpi_dev_gpio_irq_wake_get(adev, 0, &irq_ctx.wake_capable); + if (irq_ctx.irq == -ENOENT) { + ret = acpi_dev_get_gpio_irq_resource(adev, NULL, 0, &irqres); + if (ret) + return ret; + irq_ctx.irq = irqres.start; + irq_ctx.wake_capable = irqres.flags & IORESOURCE_IRQ_WAKECAPABLE; + } if (irq_ctx.irq < 0) return irq_ctx.irq; diff --git a/include/linux/acpi.h b/include/linux/acpi.h index 118a18b7ff844..83aa2fa8e81fc 100644 --- a/include/linux/acpi.h +++ b/include/linux/acpi.h @@ -1221,8 +1221,8 @@ bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, struct acpi_resource_gpio **agpio); bool acpi_gpio_get_io_resource(struct acpi_resource *ares, struct acpi_resource_gpio **agpio); -int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, int index, - bool *wake_capable); +int acpi_dev_get_gpio_irq_resource(struct acpi_device *adev, const char *name, int index, + struct resource *r); #else static inline bool acpi_gpio_get_irq_resource(struct acpi_resource *ares, struct acpi_resource_gpio **agpio) @@ -1234,28 +1234,25 @@ static inline bool acpi_gpio_get_io_resource(struct acpi_resource *ares, { return false; } -static inline int acpi_dev_gpio_irq_wake_get_by(struct acpi_device *adev, const char *name, - int index, bool *wake_capable) +static inline int acpi_dev_get_gpio_irq_resource(struct acpi_device *adev, const char *name, + int index, struct resource *r) { return -ENXIO; } #endif -static inline int acpi_dev_gpio_irq_wake_get(struct acpi_device *adev, int index, - bool *wake_capable) +static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, int index) { - return acpi_dev_gpio_irq_wake_get_by(adev, NULL, index, wake_capable); -} + struct resource r; + int ret; -static inline int acpi_dev_gpio_irq_get_by(struct acpi_device *adev, const char *name, - int index) -{ - return acpi_dev_gpio_irq_wake_get_by(adev, name, index, NULL); + ret = acpi_dev_get_gpio_irq_resource(adev, name, index, &r); + return ret ?: r.start; } static inline int acpi_dev_gpio_irq_get(struct acpi_device *adev, int index) { - return acpi_dev_gpio_irq_wake_get_by(adev, NULL, index, NULL); + return acpi_dev_gpio_irq_get_by(adev, NULL, index); } /* Device properties */