From patchwork Wed Sep 14 23:57:55 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Raul Rangel X-Patchwork-Id: 605973 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70DFFECAAD3 for ; Wed, 14 Sep 2022 23:59:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229911AbiINX7O (ORCPT ); Wed, 14 Sep 2022 19:59:14 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:46096 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229761AbiINX6t (ORCPT ); Wed, 14 Sep 2022 19:58:49 -0400 Received: from mail-io1-xd29.google.com (mail-io1-xd29.google.com [IPv6:2607:f8b0:4864:20::d29]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id BE2EE89924 for ; Wed, 14 Sep 2022 16:58:18 -0700 (PDT) Received: by mail-io1-xd29.google.com with SMTP id b23so13517273iof.2 for ; Wed, 14 Sep 2022 16:58:18 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=content-transfer-encoding:mime-version:references:in-reply-to :message-id:date:subject:cc:to:from:from:to:cc:subject:date; bh=IrPBaJhayTsmQaagjn3kGBNWcqMGVL6PSHf+mDSmAT8=; b=Y1rMEYUcGoMoMTmL0vNyZ/Dgi1ZPxTfb5SvVMCj/7FkWYfPrlBpw1G7bZh6wigSRWv dxIFsKThKju72lgMlIwoi+FSFG3YR1VVGwXGinDnM8cT9dAcz0w4yHNOdSLctMO3Nse/ gxvjDIMcRXW3Gh43U9XEz5nWl2/OCb1LxfEv0= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; 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; bh=IrPBaJhayTsmQaagjn3kGBNWcqMGVL6PSHf+mDSmAT8=; b=uvahIyHIDzK7OYEW2AzVAx5PSDZkOKl3aJy6DFtKot9J6gzu1C7ewZcFPrJRQhUS2d mZsU2J2fvVt8YGL6RfityW5mGn/36d50tDbMwlEN/7rzmYbhiebIt6Om3EHoqsVzfq6A 6e16h4L0P9mZpDq9QEatdRxbPc1+jXvQCpeP6a//Z144XsiQek8TOKLX5zM7Yq/5P6Xh GbUu1HyXNSu8jwMq1WGsPtR1zdTA+aGieHi5HFxfyDiMHfqGo7mzAXc99G5GX6Kf83Da Sog91jmoXm22QY3qA3QkYM4axTy1m1FGL0DNxEjCsZyxC+Ffsd/Zr0S0oTryY+UMMJFf DY8A== X-Gm-Message-State: ACgBeo3m/o1AJ6OwkOMYaE4DZnrOtYL9pm/L/358fCBS0iD6kJgSzGTB wNBKFzp9xCu8UP6VQEbsBRVKPg== X-Google-Smtp-Source: AA6agR5OMRFoje682GJ6kTpBwCWXG3yxx27f4f7Npbvq1pC39ftjUh8MPD+aKo/IsYS/pNqhTAlPBQ== X-Received: by 2002:a02:29c2:0:b0:34a:195e:9574 with SMTP id p185-20020a0229c2000000b0034a195e9574mr20424069jap.79.1663199898203; Wed, 14 Sep 2022 16:58:18 -0700 (PDT) Received: from rrangel920.bld.corp.google.com (h24-56-189-219.arvdco.broadband.dynamic.tds.net. [24.56.189.219]) by smtp.gmail.com with ESMTPSA id a14-20020a027a0e000000b0034c0e8829c0sm353721jac.0.2022.09.14.16.58.16 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 14 Sep 2022 16:58:17 -0700 (PDT) From: Raul E Rangel To: linux-acpi@vger.kernel.org, linux-input@vger.kernel.org Cc: jingle.wu@emc.com.tw, rafael@kernel.org, andriy.shevchenko@linux.intel.com, mario.limonciello@amd.com, hdegoede@redhat.com, linus.walleij@linaro.org, timvp@google.com, dmitry.torokhov@gmail.com, Raul E Rangel , Mika Westerberg , Wolfram Sang , linux-i2c@vger.kernel.org, linux-kernel@vger.kernel.org Subject: [PATCH v3 07/13] i2c: acpi: Use ACPI wake capability bit to set wake_irq Date: Wed, 14 Sep 2022 17:57:55 -0600 Message-Id: <20220914155914.v3.7.I8af4282adc72eb9f247adcd03676a43893a020a6@changeid> X-Mailer: git-send-email 2.37.3.968.ga6b4b080e4-goog In-Reply-To: <20220914235801.1731478-1-rrangel@chromium.org> References: <20220914235801.1731478-1-rrangel@chromium.org> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-input@vger.kernel.org Device tree already has a mechanism to pass the wake_irq. It does this by looking for the wakeup-source property and setting the I2C_CLIENT_WAKE flag. This CL adds the ACPI equivalent. It uses the ACPI interrupt wake flag to determine if the interrupt can be used to wake the system. Previously the i2c drivers had to make assumptions and blindly enable the wake IRQ. This can cause spurious wake events. e.g., If there is a device with an Active Low interrupt and the device gets powered off while suspending, the interrupt line will go low since it's no longer powered and wakes the system. For this reason we should respect the board designers wishes and honor the wake bit defined on the interrupt. Signed-off-by: Raul E Rangel Reviewed-by: Mika Westerberg Reviewed-by: Andy Shevchenko --- Changes in v3: - Convert wake_capable to bool - Only update wake_capable pointer once - Move wake_capable local into local block Changes in v2: - Look at wake_cabple bit for IRQ/Interrupt resources drivers/i2c/i2c-core-acpi.c | 33 ++++++++++++++++++++++++--------- drivers/i2c/i2c-core-base.c | 8 +++++++- drivers/i2c/i2c-core.h | 4 ++-- 3 files changed, 33 insertions(+), 12 deletions(-) diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index c762a879c4cc6b..b3d68a9659ff4f 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -137,6 +137,11 @@ static const struct acpi_device_id i2c_acpi_ignored_device_ids[] = { {} }; +struct i2c_acpi_irq_context { + int irq; + bool wake_capable; +}; + static int i2c_acpi_do_lookup(struct acpi_device *adev, struct i2c_acpi_lookup *lookup) { @@ -170,11 +175,14 @@ static int i2c_acpi_do_lookup(struct acpi_device *adev, static int i2c_acpi_add_resource(struct acpi_resource *ares, void *data) { - int *irq = data; + struct i2c_acpi_irq_context *irq_ctx = data; struct resource r; - if (*irq <= 0 && acpi_dev_resource_interrupt(ares, 0, &r)) - *irq = i2c_dev_irq_from_resources(&r, 1); + if (irq_ctx->irq <= 0 && acpi_dev_resource_interrupt(ares, 0, &r)) { + irq_ctx->irq = i2c_dev_irq_from_resources(&r, 1); + irq_ctx->wake_capable = + !!(r.flags & IORESOURCE_IRQ_WAKECAPABLE); + } return 1; /* No need to add resource to the list */ } @@ -182,31 +190,38 @@ static int i2c_acpi_add_resource(struct acpi_resource *ares, void *data) /** * i2c_acpi_get_irq - get device IRQ number from ACPI * @client: Pointer to the I2C client device + * @wake_capable: Set to true if the IRQ is wake capable * * Find the IRQ number used by a specific client device. * * Return: The IRQ number or an error code. */ -int i2c_acpi_get_irq(struct i2c_client *client) +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; - int irq = -ENOENT; + struct i2c_acpi_irq_context irq_ctx = { + .irq = -ENOENT, + }; int ret; INIT_LIST_HEAD(&resource_list); ret = acpi_dev_get_resources(adev, &resource_list, - i2c_acpi_add_resource, &irq); + i2c_acpi_add_resource, &irq_ctx); if (ret < 0) return ret; acpi_dev_free_resource_list(&resource_list); - if (irq == -ENOENT) - irq = acpi_dev_gpio_irq_get(adev, 0); + if (irq_ctx.irq == -ENOENT) + irq_ctx.irq = acpi_dev_gpio_irq_wake_get(adev, 0, + &irq_ctx.wake_capable); + + if (wake_capable) + *wake_capable = irq_ctx.wake_capable; - return irq; + return irq_ctx.irq; } static int i2c_acpi_get_info(struct acpi_device *adev, diff --git a/drivers/i2c/i2c-core-base.c b/drivers/i2c/i2c-core-base.c index 91007558bcb260..c4debd46c6340f 100644 --- a/drivers/i2c/i2c-core-base.c +++ b/drivers/i2c/i2c-core-base.c @@ -487,8 +487,14 @@ static int i2c_device_probe(struct device *dev) if (irq == -EINVAL || irq == -ENODATA) irq = of_irq_get(dev->of_node, 0); } else if (ACPI_COMPANION(dev)) { - irq = i2c_acpi_get_irq(client); + bool wake_capable; + + irq = i2c_acpi_get_irq(client, &wake_capable); + + if (irq > 0 && wake_capable) + client->flags |= I2C_CLIENT_WAKE; } + if (irq == -EPROBE_DEFER) { status = irq; goto put_sync_adapter; diff --git a/drivers/i2c/i2c-core.h b/drivers/i2c/i2c-core.h index 87e2c914f1c57b..1247e6e6e97517 100644 --- a/drivers/i2c/i2c-core.h +++ b/drivers/i2c/i2c-core.h @@ -61,11 +61,11 @@ static inline int __i2c_check_suspended(struct i2c_adapter *adap) #ifdef CONFIG_ACPI void i2c_acpi_register_devices(struct i2c_adapter *adap); -int i2c_acpi_get_irq(struct i2c_client *client); +int i2c_acpi_get_irq(struct i2c_client *client, bool *wake_capable); #else /* CONFIG_ACPI */ static inline void i2c_acpi_register_devices(struct i2c_adapter *adap) { } -static inline int i2c_acpi_get_irq(struct i2c_client *client) +static inline int i2c_acpi_get_irq(struct i2c_client *client, bool *wake_capable) { return 0; }