From patchwork Fri Jan 20 11:45:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 644858 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 D309EC05027 for ; Fri, 20 Jan 2023 11:46:57 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229851AbjATLq4 (ORCPT ); Fri, 20 Jan 2023 06:46:56 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55276 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229518AbjATLqz (ORCPT ); Fri, 20 Jan 2023 06:46:55 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DDD6CA3167 for ; Fri, 20 Jan 2023 03:45:46 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1674215146; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=M9WYlL3pKMMXSrMlRU1ZrN5RQV9XYd4sVpOYmjkCHW8=; b=bPFa9PeR1Wrkkmqt0/B+vYOo3LgAw3pXPgsqz4M/yc1QeKlo9I2dtE2CpXa7AAoSBfg/9h 2LT6vUC7ROl+w8P4fi/2TwqzNlzjOP409OLlyu5yTLyFxYxdl21ZhBFzaW5dS+quz8JmFf eUJtmGlpy05nUdoOZN4kWP/4Fy7k71g= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-410-UkW5mKknMZOPRIJ6xCLpYw-1; Fri, 20 Jan 2023 06:45:40 -0500 X-MC-Unique: UkW5mKknMZOPRIJ6xCLpYw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 041A8101A521; Fri, 20 Jan 2023 11:45:40 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id B21A5140EBF6; Fri, 20 Jan 2023 11:45:27 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org, Andy Shevchenko Subject: [PATCH v5 01/11] leds: led-class: Add missing put_device() to led_put() Date: Fri, 20 Jan 2023 12:45:14 +0100 Message-Id: <20230120114524.408368-2-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org led_put() is used to "undo" a successful of_led_get() call, of_led_get() uses class_find_device_by_of_node() which returns a reference to the device which must be free-ed with put_device() when the caller is done with it. Add a put_device() call to led_put() to free the reference returned by class_find_device_by_of_node(). And also add a put_device() in the error-exit case of try_module_get() failing. Fixes: 699a8c7c4bd3 ("leds: Add of_led_get() and led_put()") Reviewed-by: Andy Shevchenko Reviewed-by: Linus Walleij Signed-off-by: Hans de Goede --- drivers/leds/led-class.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 6a8ea94834fa..7391d2cf1370 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -241,8 +241,10 @@ struct led_classdev *of_led_get(struct device_node *np, int index) led_cdev = dev_get_drvdata(led_dev); - if (!try_module_get(led_cdev->dev->parent->driver->owner)) + if (!try_module_get(led_cdev->dev->parent->driver->owner)) { + put_device(led_cdev->dev); return ERR_PTR(-ENODEV); + } return led_cdev; } @@ -255,6 +257,7 @@ EXPORT_SYMBOL_GPL(of_led_get); void led_put(struct led_classdev *led_cdev) { module_put(led_cdev->dev->parent->driver->owner); + put_device(led_cdev->dev); } EXPORT_SYMBOL_GPL(led_put); From patchwork Fri Jan 20 11:45:15 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 645856 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 65796C25B4E for ; Fri, 20 Jan 2023 11:46:58 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229865AbjATLq5 (ORCPT ); Fri, 20 Jan 2023 06:46:57 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229550AbjATLqz (ORCPT ); Fri, 20 Jan 2023 06:46:55 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.133.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 292C3A5CC5 for ; Fri, 20 Jan 2023 03:45:49 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1674215148; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=UmIMvoQlXZvHXwWvSWbWxN/3qEORHkeS34lHWE31K1M=; b=Pv8LEbOixK+vLxC/sH8vrFIu6GKUGS+7sUOTws7isINCNFnCg50LXmeWZ3Wy1mK80PLCjo fQcmEoZr8HigLScl4bca6Ch6Vonkpuq5XCPI8CBrTmf3QIP/LsTAQHvsT3gJZn1H4lOPg6 X9g8OmLL1+Lokz+42vRs6HGiJOtz5dc= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-50-14SpSOnEM0iETPeQnElUuQ-1; Fri, 20 Jan 2023 06:45:45 -0500 X-MC-Unique: 14SpSOnEM0iETPeQnElUuQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 5B3F585A588; Fri, 20 Jan 2023 11:45:44 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 566BE140EBF6; Fri, 20 Jan 2023 11:45:40 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org, Andy Shevchenko Subject: [PATCH v5 02/11] leds: led-class: Add led_module_get() helper Date: Fri, 20 Jan 2023 12:45:15 +0100 Message-Id: <20230120114524.408368-3-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Split out part of of_led_get() into a generic led_module_get() helper function. This is a preparation patch for adding a generic (non devicetree specific) led_get() function. Reviewed-by: Andy Shevchenko Reviewed-by: Linus Walleij Signed-off-by: Hans de Goede --- Changes in v4: - Rename helper from __led_get() to led_module_get() --- drivers/leds/led-class.c | 30 ++++++++++++++++++------------ 1 file changed, 18 insertions(+), 12 deletions(-) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 7391d2cf1370..743d97b082dc 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -215,6 +215,23 @@ static int led_resume(struct device *dev) static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume); +static struct led_classdev *led_module_get(struct device *led_dev) +{ + struct led_classdev *led_cdev; + + if (!led_dev) + return ERR_PTR(-EPROBE_DEFER); + + led_cdev = dev_get_drvdata(led_dev); + + if (!try_module_get(led_cdev->dev->parent->driver->owner)) { + put_device(led_cdev->dev); + return ERR_PTR(-ENODEV); + } + + return led_cdev; +} + /** * of_led_get() - request a LED device via the LED framework * @np: device node to get the LED device from @@ -226,7 +243,6 @@ static SIMPLE_DEV_PM_OPS(leds_class_dev_pm_ops, led_suspend, led_resume); struct led_classdev *of_led_get(struct device_node *np, int index) { struct device *led_dev; - struct led_classdev *led_cdev; struct device_node *led_node; led_node = of_parse_phandle(np, "leds", index); @@ -236,17 +252,7 @@ struct led_classdev *of_led_get(struct device_node *np, int index) led_dev = class_find_device_by_of_node(leds_class, led_node); of_node_put(led_node); - if (!led_dev) - return ERR_PTR(-EPROBE_DEFER); - - led_cdev = dev_get_drvdata(led_dev); - - if (!try_module_get(led_cdev->dev->parent->driver->owner)) { - put_device(led_cdev->dev); - return ERR_PTR(-ENODEV); - } - - return led_cdev; + return led_module_get(led_dev); } EXPORT_SYMBOL_GPL(of_led_get); From patchwork Fri Jan 20 11:45:16 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 644857 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 BC543C25B50 for ; 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Fri, 20 Jan 2023 06:45:48 -0500 X-MC-Unique: CEFJphzmNX2-2meUaJgl7g-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id E5AF4185A794; Fri, 20 Jan 2023 11:45:47 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 9DCCF140EBF6; Fri, 20 Jan 2023 11:45:44 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org, Andy Shevchenko Subject: [PATCH v5 03/11] leds: led-class: Add __devm_led_get() helper Date: Fri, 20 Jan 2023 12:45:16 +0100 Message-Id: <20230120114524.408368-4-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add a __devm_led_get() helper which registers a passed in led_classdev with devm for unregistration. This is a preparation patch for adding a generic (non devicetree specific) devm_led_get() function. Reviewed-by: Andy Shevchenko Reviewed-by: Linus Walleij Signed-off-by: Hans de Goede --- drivers/leds/led-class.c | 29 +++++++++++++++++------------ 1 file changed, 17 insertions(+), 12 deletions(-) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 743d97b082dc..4904d140a560 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -274,6 +274,22 @@ static void devm_led_release(struct device *dev, void *res) led_put(*p); } +static struct led_classdev *__devm_led_get(struct device *dev, struct led_classdev *led) +{ + struct led_classdev **dr; + + dr = devres_alloc(devm_led_release, sizeof(struct led_classdev *), GFP_KERNEL); + if (!dr) { + led_put(led); + return ERR_PTR(-ENOMEM); + } + + *dr = led; + devres_add(dev, dr); + + return led; +} + /** * devm_of_led_get - Resource-managed request of a LED device * @dev: LED consumer @@ -289,7 +305,6 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev, int index) { struct led_classdev *led; - struct led_classdev **dr; if (!dev) return ERR_PTR(-EINVAL); @@ -298,17 +313,7 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev, if (IS_ERR(led)) return led; - dr = devres_alloc(devm_led_release, sizeof(struct led_classdev *), - GFP_KERNEL); - if (!dr) { - led_put(led); - return ERR_PTR(-ENOMEM); - } - - *dr = led; - devres_add(dev, dr); - - return led; + return __devm_led_get(dev, led); } EXPORT_SYMBOL_GPL(devm_of_led_get); From patchwork Fri Jan 20 11:45:17 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 645855 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 4BBBDC05027 for ; Fri, 20 Jan 2023 11:47:46 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229811AbjATLro (ORCPT ); Fri, 20 Jan 2023 06:47:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55302 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229911AbjATLrm (ORCPT ); Fri, 20 Jan 2023 06:47:42 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 9994AAA7E0 for ; Fri, 20 Jan 2023 03:45:57 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1674215156; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=Bbe9z/QfPbRLjMmd2NdM01X6iKaiDeiCdG9jE+MnnFg=; b=dDX2K7E1xcC5V5VQZUIRl4oQPG7pyJ3WYhWzNVz6u0TmrE91YfNdNVrvQYwqutvqdmdpAu KUdH2cadp5F1krqf+7XcM1iRTaNPlRn04Hn8R2h5sYAFO7rvXZ4n2O6udKcQpFXGShNKzQ 95oLl3TOgUPH8dSiqzXJ74l09cWfIbM= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-397-tbw3YMK6PTSyJA0Jihx4nQ-1; Fri, 20 Jan 2023 06:45:53 -0500 X-MC-Unique: tbw3YMK6PTSyJA0Jihx4nQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id B040E85C064; Fri, 20 Jan 2023 11:45:52 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 49F30140EBF6; Fri, 20 Jan 2023 11:45:48 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v5 04/11] leds: led-class: Add generic [devm_]led_get() Date: Fri, 20 Jan 2023 12:45:17 +0100 Message-Id: <20230120114524.408368-5-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add a generic [devm_]led_get() method which can be used on both devicetree and non devicetree platforms to get a LED classdev associated with a specific function on a specific device, e.g. the privacy LED associated with a specific camera sensor. Note unlike of_led_get() this takes a string describing the function rather then an index. This is done because e.g. camera sensors might have a privacy LED, or a flash LED, or both and using an index approach leaves it unclear what the function of index 0 is if there is only 1 LED. This uses a lookup-table mechanism for non devicetree platforms. This allows the platform code to map specific LED class_dev-s to a specific device,function combinations this way. For devicetree platforms getting the LED by function-name could be made to work using the standard devicetree pattern of adding a -names string array to map names to the indexes. Reviewed-by: Linus Walleij Signed-off-by: Hans de Goede --- Changes in v5: - Rename lookup-table names to match those from the gpio and reset lookups: s/led_name/provider/ s/consumer_dev_name/dev_id/ s/consumer_function/con_id/ Changes in v4: - Split out support for led_get() devicetree name-based lookup support into a separate RFC patch as there currently are no users for this - Use kstrdup_const() / kfree_const() for the led_name --- drivers/leds/led-class.c | 84 ++++++++++++++++++++++++++++++++++++++++ include/linux/leds.h | 21 ++++++++++ 2 files changed, 105 insertions(+) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 4904d140a560..0c4b8d8d2b4f 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -23,6 +23,8 @@ #include "leds.h" static struct class *leds_class; +static DEFINE_MUTEX(leds_lookup_lock); +static LIST_HEAD(leds_lookup_list); static ssize_t brightness_show(struct device *dev, struct device_attribute *attr, char *buf) @@ -317,6 +319,88 @@ struct led_classdev *__must_check devm_of_led_get(struct device *dev, } EXPORT_SYMBOL_GPL(devm_of_led_get); +/** + * led_get() - request a LED device via the LED framework + * @dev: device for which to get the LED device + * @con_id: name of the LED from the device's point of view + * + * @return a pointer to a LED device or ERR_PTR(errno) on failure. + */ +struct led_classdev *led_get(struct device *dev, char *con_id) +{ + struct led_lookup_data *lookup; + const char *provider = NULL; + struct device *led_dev; + + mutex_lock(&leds_lookup_lock); + list_for_each_entry(lookup, &leds_lookup_list, list) { + if (!strcmp(lookup->dev_id, dev_name(dev)) && + !strcmp(lookup->con_id, con_id)) { + provider = kstrdup_const(lookup->provider, GFP_KERNEL); + break; + } + } + mutex_unlock(&leds_lookup_lock); + + if (!provider) + return ERR_PTR(-ENOENT); + + led_dev = class_find_device_by_name(leds_class, provider); + kfree_const(provider); + + return led_module_get(led_dev); +} +EXPORT_SYMBOL_GPL(led_get); + +/** + * devm_led_get() - request a LED device via the LED framework + * @dev: device for which to get the LED device + * @con_id: name of the LED from the device's point of view + * + * The LED device returned from this function is automatically released + * on driver detach. + * + * @return a pointer to a LED device or ERR_PTR(errno) on failure. + */ +struct led_classdev *devm_led_get(struct device *dev, char *con_id) +{ + struct led_classdev *led; + + led = led_get(dev, con_id); + if (IS_ERR(led)) + return led; + + return __devm_led_get(dev, led); +} +EXPORT_SYMBOL_GPL(devm_led_get); + +/** + * led_add_lookup() - Add a LED lookup table entry + * @led_lookup: the lookup table entry to add + * + * Add a LED lookup table entry. On systems without devicetree the lookup table + * is used by led_get() to find LEDs. + */ +void led_add_lookup(struct led_lookup_data *led_lookup) +{ + mutex_lock(&leds_lookup_lock); + list_add_tail(&led_lookup->list, &leds_lookup_list); + mutex_unlock(&leds_lookup_lock); +} +EXPORT_SYMBOL_GPL(led_add_lookup); + +/** + * led_remove_lookup() - Remove a LED lookup table entry + * @led_lookup: the lookup table entry to remove + */ +void led_remove_lookup(struct led_lookup_data *led_lookup) +{ + mutex_lock(&leds_lookup_lock); + list_del(&led_lookup->list); + mutex_unlock(&leds_lookup_lock); +} +EXPORT_SYMBOL_GPL(led_remove_lookup); + static int led_classdev_next_name(const char *init_name, char *name, size_t len) { diff --git a/include/linux/leds.h b/include/linux/leds.h index ba4861ec73d3..8d6767072ebf 100644 --- a/include/linux/leds.h +++ b/include/linux/leds.h @@ -39,6 +39,21 @@ enum led_default_state { LEDS_DEFSTATE_KEEP = 2, }; +/** + * struct led_lookup_data - represents a single LED lookup entry + * + * @list: internal list of all LED lookup entries + * @provider: name of led_classdev providing the LED + * @dev_id: name of the device associated with this LED + * @con_id: name of the LED from the device's point of view + */ +struct led_lookup_data { + struct list_head list; + const char *provider; + const char *dev_id; + const char *con_id; +}; + struct led_init_data { /* device fwnode handle */ struct fwnode_handle *fwnode; @@ -211,6 +226,12 @@ void devm_led_classdev_unregister(struct device *parent, void led_classdev_suspend(struct led_classdev *led_cdev); void led_classdev_resume(struct led_classdev *led_cdev); +void led_add_lookup(struct led_lookup_data *led_lookup); +void led_remove_lookup(struct led_lookup_data *led_lookup); + +struct led_classdev *__must_check led_get(struct device *dev, char *con_id); +struct led_classdev *__must_check devm_led_get(struct device *dev, char *con_id); + extern struct led_classdev *of_led_get(struct device_node *np, int index); extern void led_put(struct led_classdev *led_cdev); struct led_classdev *__must_check devm_of_led_get(struct device *dev, From patchwork Fri Jan 20 11:45:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 644856 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 DE4FAC25B50 for ; 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Fri, 20 Jan 2023 06:45:56 -0500 X-MC-Unique: Z5RTCvFaOFS3WGfoHAG2vQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id C5ACE85C06A; Fri, 20 Jan 2023 11:45:55 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 01FD4140EBF6; Fri, 20 Jan 2023 11:45:52 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org, Andy Shevchenko Subject: [PATCH v5 05/11] [RFC] leds: led-class: Add devicetree support to led_get() Date: Fri, 20 Jan 2023 12:45:18 +0100 Message-Id: <20230120114524.408368-6-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Turn of_led_get() into a more generic __of_led_get() helper function, which can lookup LEDs in devicetree by either name or index. And use this new helper to add devicetree support to the generic (non devicetree specific) [devm_]led_get() function. This uses the standard devicetree pattern of adding a -names string array to map names to the indexes for an array of resources. Note the new led-names property for LED consumers is not added to the devicetree documentation because there seems to be no documentation for the leds property itself to extend it with this. It seems that how LED consumers should be described is not documented at all ATM. This patch is marked as RFC because of both the missing devicetree documentation and because there are no devicetree users of the generic [devm_]led_get() function for now. Reviewed-by: Andy Shevchenko Reviewed-by: Linus Walleij Signed-off-by: Hans de Goede Reviewed-by: Lee Jones --- drivers/leds/led-class.c | 37 ++++++++++++++++++++++++++++--------- 1 file changed, 28 insertions(+), 9 deletions(-) diff --git a/drivers/leds/led-class.c b/drivers/leds/led-class.c index 0c4b8d8d2b4f..2f3af6e30208 100644 --- a/drivers/leds/led-class.c +++ b/drivers/leds/led-class.c @@ -234,19 +234,18 @@ static struct led_classdev *led_module_get(struct device *led_dev) return led_cdev; } -/** - * of_led_get() - request a LED device via the LED framework - * @np: device node to get the LED device from - * @index: the index of the LED - * - * Returns the LED device parsed from the phandle specified in the "leds" - * property of a device tree node or a negative error-code on failure. - */ -struct led_classdev *of_led_get(struct device_node *np, int index) +static struct led_classdev *__of_led_get(struct device_node *np, int index, + const char *name) { struct device *led_dev; struct device_node *led_node; + /* + * For named LEDs, first look up the name in the "led-names" property. + * If it cannot be found, then of_parse_phandle() will propagate the error. + */ + if (name) + index = of_property_match_string(np, "led-names", name); led_node = of_parse_phandle(np, "leds", index); if (!led_node) return ERR_PTR(-ENOENT); @@ -256,6 +255,19 @@ struct led_classdev *of_led_get(struct device_node *np, int index) return led_module_get(led_dev); } + +/** + * of_led_get() - request a LED device via the LED framework + * @np: device node to get the LED device from + * @index: the index of the LED + * + * Returns the LED device parsed from the phandle specified in the "leds" + * property of a device tree node or a negative error-code on failure. + */ +struct led_classdev *of_led_get(struct device_node *np, int index) +{ + return __of_led_get(np, index, NULL); +} EXPORT_SYMBOL_GPL(of_led_get); /** @@ -329,9 +341,16 @@ EXPORT_SYMBOL_GPL(devm_of_led_get); struct led_classdev *led_get(struct device *dev, char *con_id) { struct led_lookup_data *lookup; + struct led_classdev *led_cdev; const char *provider = NULL; struct device *led_dev; + if (dev->of_node) { + led_cdev = __of_led_get(dev->of_node, -1, con_id); + if (!IS_ERR(led_cdev) || PTR_ERR(led_cdev) != -ENOENT) + return led_cdev; + } + mutex_lock(&leds_lookup_lock); list_for_each_entry(lookup, &leds_lookup_list, list) { if (!strcmp(lookup->dev_id, dev_name(dev)) && From patchwork Fri Jan 20 11:45:19 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 644855 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 BACFEC27C7C for ; Fri, 20 Jan 2023 11:47:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229983AbjATLru (ORCPT ); Fri, 20 Jan 2023 06:47:50 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55462 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229981AbjATLrr (ORCPT ); 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Fri, 20 Jan 2023 06:45:59 -0500 X-MC-Unique: XN4TBbSaNgyh0dyB5D4tag-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 8B51B29AB3FF; Fri, 20 Jan 2023 11:45:58 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 0B339140EBF6; Fri, 20 Jan 2023 11:45:55 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v5 06/11] media: v4l2-core: Built async and fwnode code into videodev.ko Date: Fri, 20 Jan 2023 12:45:19 +0100 Message-Id: <20230120114524.408368-7-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Currently the videodev.ko code may be builtin while e.g. v4l2-fwnode.ko is build as a module. This makes it hard to add code depending on other subsystems spanning both videodev.ko and v4l2-fwnode.ko. Specifically this block adding code depending on the LED subsystem. This is made even harder because CONFIG_V4L2_FWNODE is selected, not depended on so it itself cannot depend on another subsystem without editing all the Kconfig symbols selecting it to also list the dependency and there are many of such symbols. Adding a "select LED_CLASS if NEW_LEDS" to CONFIG_V4L2_FWNODE leads to Kconfig erroring out with "error: recursive dependency detected!". To fix this dependency mess, change the V4L2_FWNODE and V4L2_ASYNC (which V4L2_FWNODE selects) Kconfig symbols from tristate to bools and link their code into videodev.ko instead of making them separate modules. This will allow using IS_REACHABLE(LED_CLASS) for the new LED integration code without needing to worry that it expands to 0 in some places and 1 in other places because some of the code being builtin vs modular. On x86_64 this leads to the following size changes for videodev.ko [hans@shalem linux]$ size drivers/media/v4l2-core/videodev.ko Before: text data bss dec hex filename 218206 14395 2448 235049 39629 drivers/media/v4l2-core/videodev.ko After: text data bss dec hex filename 243213 17615 2456 263284 40474 drivers/media/v4l2-core/videodev.ko So (as expected) there is some increase in size here, but it really is not that much. And the uncompressed no-debuginfo .ko file disk-usage actually shrinks by 17 KiB (comparing the slightly larger videodev.ko against the 3 original modules) and loading time will also be better. Acked-by: Linus Walleij Signed-off-by: Hans de Goede --- Changes in v5: - Add a new v4l2-dev-priv.h for the async debugfs prototypes and add static inline wrappers there when CONFIG_V4L2_ASYNC is not enabled Changes in v4: - New patch in v4 of this patch-set --- drivers/media/v4l2-core/Kconfig | 4 ++-- drivers/media/v4l2-core/Makefile | 4 ++-- drivers/media/v4l2-core/v4l2-async.c | 17 ++++------------- drivers/media/v4l2-core/v4l2-dev-priv.h | 19 +++++++++++++++++++ drivers/media/v4l2-core/v4l2-dev.c | 8 ++++++++ drivers/media/v4l2-core/v4l2-fwnode.c | 6 ------ 6 files changed, 35 insertions(+), 23 deletions(-) create mode 100644 drivers/media/v4l2-core/v4l2-dev-priv.h diff --git a/drivers/media/v4l2-core/Kconfig b/drivers/media/v4l2-core/Kconfig index 348559bc2468..73574d946010 100644 --- a/drivers/media/v4l2-core/Kconfig +++ b/drivers/media/v4l2-core/Kconfig @@ -68,11 +68,11 @@ config V4L2_FLASH_LED_CLASS When in doubt, say N. config V4L2_FWNODE - tristate + bool select V4L2_ASYNC config V4L2_ASYNC - tristate + bool # Used by drivers that need Videobuf modules config VIDEOBUF_GEN diff --git a/drivers/media/v4l2-core/Makefile b/drivers/media/v4l2-core/Makefile index 41d91bd10cf2..8c5a1ab8d939 100644 --- a/drivers/media/v4l2-core/Makefile +++ b/drivers/media/v4l2-core/Makefile @@ -15,7 +15,9 @@ videodev-objs := v4l2-dev.o v4l2-ioctl.o v4l2-device.o v4l2-fh.o \ # Please keep it alphabetically sorted by Kconfig name # (e. g. LC_ALL=C sort Makefile) +videodev-$(CONFIG_V4L2_ASYNC) += v4l2-async.o videodev-$(CONFIG_COMPAT) += v4l2-compat-ioctl32.o +videodev-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o videodev-$(CONFIG_MEDIA_CONTROLLER) += v4l2-mc.o videodev-$(CONFIG_SPI) += v4l2-spi.o videodev-$(CONFIG_TRACEPOINTS) += v4l2-trace.o @@ -24,9 +26,7 @@ videodev-$(CONFIG_VIDEO_V4L2_I2C) += v4l2-i2c.o # Please keep it alphabetically sorted by Kconfig name # (e. g. LC_ALL=C sort Makefile) -obj-$(CONFIG_V4L2_ASYNC) += v4l2-async.o obj-$(CONFIG_V4L2_FLASH_LED_CLASS) += v4l2-flash-led-class.o -obj-$(CONFIG_V4L2_FWNODE) += v4l2-fwnode.o obj-$(CONFIG_V4L2_H264) += v4l2-h264.o obj-$(CONFIG_V4L2_JPEG_HELPER) += v4l2-jpeg.o obj-$(CONFIG_V4L2_MEM2MEM_DEV) += v4l2-mem2mem.o diff --git a/drivers/media/v4l2-core/v4l2-async.c b/drivers/media/v4l2-core/v4l2-async.c index 2f1b718a9189..024d6b82b50a 100644 --- a/drivers/media/v4l2-core/v4l2-async.c +++ b/drivers/media/v4l2-core/v4l2-async.c @@ -11,7 +11,6 @@ #include #include #include -#include #include #include #include @@ -24,6 +23,8 @@ #include #include +#include "v4l2-dev-priv.h" + static int v4l2_async_nf_call_bound(struct v4l2_async_notifier *n, struct v4l2_subdev *subdev, struct v4l2_async_subdev *asd) @@ -900,25 +901,15 @@ DEFINE_SHOW_ATTRIBUTE(pending_subdevs); static struct dentry *v4l2_async_debugfs_dir; -static int __init v4l2_async_init(void) +void __init v4l2_async_debugfs_init(void) { v4l2_async_debugfs_dir = debugfs_create_dir("v4l2-async", NULL); debugfs_create_file("pending_async_subdevices", 0444, v4l2_async_debugfs_dir, NULL, &pending_subdevs_fops); - - return 0; } -static void __exit v4l2_async_exit(void) +void __exit v4l2_async_debugfs_exit(void) { debugfs_remove_recursive(v4l2_async_debugfs_dir); } - -subsys_initcall(v4l2_async_init); -module_exit(v4l2_async_exit); - -MODULE_AUTHOR("Guennadi Liakhovetski "); -MODULE_AUTHOR("Sakari Ailus "); -MODULE_AUTHOR("Ezequiel Garcia "); -MODULE_LICENSE("GPL"); diff --git a/drivers/media/v4l2-core/v4l2-dev-priv.h b/drivers/media/v4l2-core/v4l2-dev-priv.h new file mode 100644 index 000000000000..b5b1ee78be20 --- /dev/null +++ b/drivers/media/v4l2-core/v4l2-dev-priv.h @@ -0,0 +1,19 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * Video capture interface for Linux version 2 private header. + * + * Copyright (C) 2023 Hans de Goede + */ + +#ifndef _V4L2_DEV_PRIV_H_ +#define _V4L2_DEV_PRIV_H_ + +#if IS_ENABLED(CONFIG_V4L2_ASYNC) +void v4l2_async_debugfs_init(void); +void v4l2_async_debugfs_exit(void); +#else +static inline void v4l2_async_debugfs_init(void) {} +static inline void v4l2_async_debugfs_exit(void) {} +#endif + +#endif diff --git a/drivers/media/v4l2-core/v4l2-dev.c b/drivers/media/v4l2-core/v4l2-dev.c index 397d553177fa..10ba2e4196a6 100644 --- a/drivers/media/v4l2-core/v4l2-dev.c +++ b/drivers/media/v4l2-core/v4l2-dev.c @@ -31,6 +31,8 @@ #include #include +#include "v4l2-dev-priv.h" + #define VIDEO_NUM_DEVICES 256 #define VIDEO_NAME "video4linux" @@ -1190,6 +1192,7 @@ static int __init videodev_init(void) return -EIO; } + v4l2_async_debugfs_init(); return 0; } @@ -1197,6 +1200,7 @@ static void __exit videodev_exit(void) { dev_t dev = MKDEV(VIDEO_MAJOR, 0); + v4l2_async_debugfs_exit(); class_unregister(&video_class); unregister_chrdev_region(dev, VIDEO_NUM_DEVICES); } @@ -1205,6 +1209,10 @@ subsys_initcall(videodev_init); module_exit(videodev_exit) MODULE_AUTHOR("Alan Cox, Mauro Carvalho Chehab , Bill Dirks, Justin Schoeman, Gerd Knorr"); +MODULE_AUTHOR("Guennadi Liakhovetski "); +MODULE_AUTHOR("Sakari Ailus "); +MODULE_AUTHOR("Ezequiel Garcia "); +MODULE_AUTHOR("Sylwester Nawrocki "); MODULE_DESCRIPTION("Video4Linux2 core driver"); MODULE_LICENSE("GPL"); MODULE_ALIAS_CHARDEV_MAJOR(VIDEO_MAJOR); diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index 3d9533c1b202..c8a2264262bc 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -17,7 +17,6 @@ #include #include #include -#include #include #include #include @@ -1328,8 +1327,3 @@ int v4l2_async_register_subdev_sensor(struct v4l2_subdev *sd) return ret; } EXPORT_SYMBOL_GPL(v4l2_async_register_subdev_sensor); - -MODULE_LICENSE("GPL"); -MODULE_AUTHOR("Sakari Ailus "); -MODULE_AUTHOR("Sylwester Nawrocki "); -MODULE_AUTHOR("Guennadi Liakhovetski "); From patchwork Fri Jan 20 11:45:20 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 644854 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 3B33FC27C76 for ; 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Fri, 20 Jan 2023 06:46:02 -0500 X-MC-Unique: MBd4liUrPqKM0NECBFmkag-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 50659858F09; Fri, 20 Jan 2023 11:46:01 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id CC0FF140EBF6; Fri, 20 Jan 2023 11:45:58 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v5 07/11] media: v4l2-core: Make the v4l2-core code enable/disable the privacy LED if present Date: Fri, 20 Jan 2023 12:45:20 +0100 Message-Id: <20230120114524.408368-8-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Make v4l2_async_register_subdev_sensor() try to get a privacy LED associated with the sensor and extend the call_s_stream() wrapper to enable/disable the privacy LED if found. This makes the core handle privacy LED control, rather then having to duplicate this code in all the sensor drivers. Suggested-by: Sakari Ailus Acked-by: Linus Walleij Signed-off-by: Hans de Goede --- Changes in v4 (requested by Laurent Pinchart): - Move the led_get() call to v4l2_async_register_subdev_sensor() and make errors other then -ENOENT fail the register() call. - Move the led_disable_sysfs() call to be done at led_get() time, instead of only disabling the sysfs interface when the sensor is streaming. --- drivers/media/v4l2-core/v4l2-fwnode.c | 15 +++++++++++++++ drivers/media/v4l2-core/v4l2-subdev.c | 18 ++++++++++++++++++ include/media/v4l2-subdev.h | 3 +++ 3 files changed, 36 insertions(+) diff --git a/drivers/media/v4l2-core/v4l2-fwnode.c b/drivers/media/v4l2-core/v4l2-fwnode.c index c8a2264262bc..cfac1e2ae501 100644 --- a/drivers/media/v4l2-core/v4l2-fwnode.c +++ b/drivers/media/v4l2-core/v4l2-fwnode.c @@ -16,6 +16,7 @@ */ #include #include +#include #include #include #include @@ -1295,6 +1296,20 @@ int v4l2_async_register_subdev_sensor(struct v4l2_subdev *sd) if (WARN_ON(!sd->dev)) return -ENODEV; +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + sd->privacy_led = led_get(sd->dev, "privacy-led"); + if (IS_ERR(sd->privacy_led) && PTR_ERR(sd->privacy_led) != -ENOENT) + return dev_err_probe(sd->dev, PTR_ERR(sd->privacy_led), "getting privacy LED\n"); + + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + mutex_lock(&sd->privacy_led->led_access); + led_sysfs_disable(sd->privacy_led); + led_trigger_remove(sd->privacy_led); + led_set_brightness(sd->privacy_led, 0); + mutex_unlock(&sd->privacy_led->led_access); + } +#endif + notifier = kzalloc(sizeof(*notifier), GFP_KERNEL); if (!notifier) return -ENOMEM; diff --git a/drivers/media/v4l2-core/v4l2-subdev.c b/drivers/media/v4l2-core/v4l2-subdev.c index 4988a25bd8f4..f33e943aab3f 100644 --- a/drivers/media/v4l2-core/v4l2-subdev.c +++ b/drivers/media/v4l2-core/v4l2-subdev.c @@ -9,6 +9,7 @@ */ #include +#include #include #include #include @@ -322,6 +323,14 @@ static int call_s_stream(struct v4l2_subdev *sd, int enable) { int ret; +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + if (enable) + led_set_brightness(sd->privacy_led, sd->privacy_led->max_brightness); + else + led_set_brightness(sd->privacy_led, 0); + } +#endif ret = sd->ops->video->s_stream(sd, enable); if (!enable && ret < 0) { @@ -1050,6 +1059,14 @@ EXPORT_SYMBOL_GPL(__v4l2_subdev_init_finalize); void v4l2_subdev_cleanup(struct v4l2_subdev *sd) { +#if IS_REACHABLE(CONFIG_LEDS_CLASS) + if (!IS_ERR_OR_NULL(sd->privacy_led)) { + mutex_lock(&sd->privacy_led->led_access); + led_sysfs_enable(sd->privacy_led); + mutex_unlock(&sd->privacy_led->led_access); + led_put(sd->privacy_led); + } +#endif __v4l2_subdev_state_free(sd->active_state); sd->active_state = NULL; } @@ -1090,6 +1107,7 @@ void v4l2_subdev_init(struct v4l2_subdev *sd, const struct v4l2_subdev_ops *ops) sd->grp_id = 0; sd->dev_priv = NULL; sd->host_priv = NULL; + sd->privacy_led = NULL; #if defined(CONFIG_MEDIA_CONTROLLER) sd->entity.name = sd->name; sd->entity.obj_type = MEDIA_ENTITY_TYPE_V4L2_SUBDEV; diff --git a/include/media/v4l2-subdev.h b/include/media/v4l2-subdev.h index b15fa9930f30..0547313f98cc 100644 --- a/include/media/v4l2-subdev.h +++ b/include/media/v4l2-subdev.h @@ -38,6 +38,7 @@ struct v4l2_subdev; struct v4l2_subdev_fh; struct tuner_setup; struct v4l2_mbus_frame_desc; +struct led_classdev; /** * struct v4l2_decode_vbi_line - used to decode_vbi_line @@ -982,6 +983,8 @@ struct v4l2_subdev { * appropriate functions. */ + struct led_classdev *privacy_led; + /* * TODO: active_state should most likely be changed from a pointer to an * embedded field. For the time being it's kept as a pointer to more From patchwork Fri Jan 20 11:45:21 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 645853 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 485BFC38141 for ; Fri, 20 Jan 2023 11:47:59 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230033AbjATLry (ORCPT ); Fri, 20 Jan 2023 06:47:54 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55552 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229893AbjATLrv (ORCPT ); Fri, 20 Jan 2023 06:47:51 -0500 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 5E4EDBAF2C for ; Fri, 20 Jan 2023 03:46:18 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1674215177; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=sgkJ8gjvAZ2oCUIXyOJukkzBVDQc7aYrsHkcYUv9HyA=; b=MnRNFhcIFlDpQ9OV48ynt8IYXuAJfOcjiKsbTh+8AU6O/HYgtsMF4tKvx6vDhSQfdXw1ui uVSRSlbg4MoZHrak+NcuFPfb7QFJwrLDW9Mm1e22sWNDyQUee2Pr52ZiTpOj3O69MT4GWb Az1akLcLeBPHf3fpWwIOHtX6yMFjH/I= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-369-kKUioZ9rO-SndU8ykS6VTg-1; Fri, 20 Jan 2023 06:46:06 -0500 X-MC-Unique: kKUioZ9rO-SndU8ykS6VTg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 94BD7801779; Fri, 20 Jan 2023 11:46:05 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 89710140EBF6; Fri, 20 Jan 2023 11:46:01 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v5 08/11] platform/x86: int3472/discrete: Refactor GPIO to sensor mapping Date: Fri, 20 Jan 2023 12:45:21 +0100 Message-Id: <20230120114524.408368-9-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Add a helper function to map the type returned by the _DSM method to a function name + the default polarity for that function. And fold the INT3472_GPIO_TYPE_RESET and INT3472_GPIO_TYPE_POWERDOWN cases into a single generic case. This is a preparation patch for further GPIO mapping changes. Signed-off-by: Hans de Goede --- Changes in v3: - Add break to default case Changes in v2: - Make the helper function doing the type -> function mapping, also return a default polarity for the function. --- drivers/platform/x86/intel/int3472/discrete.c | 45 +++++++++++++++---- 1 file changed, 36 insertions(+), 9 deletions(-) diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c index c42c3faa2c32..708d51f9b41d 100644 --- a/drivers/platform/x86/intel/int3472/discrete.c +++ b/drivers/platform/x86/intel/int3472/discrete.c @@ -188,6 +188,36 @@ static int skl_int3472_map_gpio_to_clk(struct int3472_discrete_device *int3472, return 0; } +static void int3472_get_func_and_polarity(u8 type, const char **func, u32 *polarity) +{ + switch (type) { + case INT3472_GPIO_TYPE_RESET: + *func = "reset"; + *polarity = GPIO_ACTIVE_LOW; + break; + case INT3472_GPIO_TYPE_POWERDOWN: + *func = "powerdown"; + *polarity = GPIO_ACTIVE_LOW; + break; + case INT3472_GPIO_TYPE_CLK_ENABLE: + *func = "clk-enable"; + *polarity = GPIO_ACTIVE_HIGH; + break; + case INT3472_GPIO_TYPE_PRIVACY_LED: + *func = "privacy-led"; + *polarity = GPIO_ACTIVE_HIGH; + break; + case INT3472_GPIO_TYPE_POWER_ENABLE: + *func = "power-enable"; + *polarity = GPIO_ACTIVE_HIGH; + break; + default: + *func = "unknown"; + *polarity = GPIO_ACTIVE_HIGH; + break; + } +} + /** * skl_int3472_handle_gpio_resources: Map PMIC resources to consuming sensor * @ares: A pointer to a &struct acpi_resource @@ -227,6 +257,8 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, struct acpi_resource_gpio *agpio; union acpi_object *obj; const char *err_msg; + const char *func; + u32 polarity; int ret; u8 type; @@ -250,19 +282,14 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, type = obj->integer.value & 0xff; + int3472_get_func_and_polarity(type, &func, &polarity); + switch (type) { case INT3472_GPIO_TYPE_RESET: - ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, "reset", - GPIO_ACTIVE_LOW); - if (ret) - err_msg = "Failed to map reset pin to sensor\n"; - - break; case INT3472_GPIO_TYPE_POWERDOWN: - ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, "powerdown", - GPIO_ACTIVE_LOW); + ret = skl_int3472_map_gpio_to_sensor(int3472, agpio, func, polarity); if (ret) - err_msg = "Failed to map powerdown pin to sensor\n"; + err_msg = "Failed to map GPIO pin to sensor\n"; break; case INT3472_GPIO_TYPE_CLK_ENABLE: From patchwork Fri Jan 20 11:45:22 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 645854 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 10365C25B4E for ; Fri, 20 Jan 2023 11:47:51 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229479AbjATLrs (ORCPT ); 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Fri, 20 Jan 2023 06:46:09 -0500 X-MC-Unique: Nv6iatZiOHOlVe0Meas6Sw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 54C9B85A588; Fri, 20 Jan 2023 11:46:08 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id CF6C1140EBF6; Fri, 20 Jan 2023 11:46:05 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v5 09/11] platform/x86: int3472/discrete: Create a LED class device for the privacy LED Date: Fri, 20 Jan 2023 12:45:22 +0100 Message-Id: <20230120114524.408368-10-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org On some systems, e.g. the Lenovo ThinkPad X1 Yoga gen 7 and the ThinkPad X1 Nano gen 2 there is no clock-enable pin, triggering the: "No clk GPIO. The privacy LED won't work" warning and causing the privacy LED to not work. Fix this by modeling the privacy LED as a LED class device rather then integrating it with the registered clock. Note this relies on media subsys changes to actually turn the LED on/off when the sensor's v4l2_subdev's s_stream() operand gets called. Signed-off-by: Hans de Goede --- Changes in v4: - Make struct led_classdev the first member of the pled struct - Use strchr to replace the : with _ in the acpi_dev_name() --- drivers/platform/x86/intel/int3472/Makefile | 2 +- .../x86/intel/int3472/clk_and_regulator.c | 3 - drivers/platform/x86/intel/int3472/common.h | 15 +++- drivers/platform/x86/intel/int3472/discrete.c | 58 ++++----------- drivers/platform/x86/intel/int3472/led.c | 74 +++++++++++++++++++ 5 files changed, 105 insertions(+), 47 deletions(-) create mode 100644 drivers/platform/x86/intel/int3472/led.c diff --git a/drivers/platform/x86/intel/int3472/Makefile b/drivers/platform/x86/intel/int3472/Makefile index cfec7784c5c9..9f16cb514397 100644 --- a/drivers/platform/x86/intel/int3472/Makefile +++ b/drivers/platform/x86/intel/int3472/Makefile @@ -1,4 +1,4 @@ obj-$(CONFIG_INTEL_SKL_INT3472) += intel_skl_int3472_discrete.o \ intel_skl_int3472_tps68470.o -intel_skl_int3472_discrete-y := discrete.o clk_and_regulator.o common.o +intel_skl_int3472_discrete-y := discrete.o clk_and_regulator.o led.o common.o intel_skl_int3472_tps68470-y := tps68470.o tps68470_board_data.o common.o diff --git a/drivers/platform/x86/intel/int3472/clk_and_regulator.c b/drivers/platform/x86/intel/int3472/clk_and_regulator.c index 74dc2cff799e..e3b597d93388 100644 --- a/drivers/platform/x86/intel/int3472/clk_and_regulator.c +++ b/drivers/platform/x86/intel/int3472/clk_and_regulator.c @@ -23,8 +23,6 @@ static int skl_int3472_clk_prepare(struct clk_hw *hw) struct int3472_gpio_clock *clk = to_int3472_clk(hw); gpiod_set_value_cansleep(clk->ena_gpio, 1); - gpiod_set_value_cansleep(clk->led_gpio, 1); - return 0; } @@ -33,7 +31,6 @@ static void skl_int3472_clk_unprepare(struct clk_hw *hw) struct int3472_gpio_clock *clk = to_int3472_clk(hw); gpiod_set_value_cansleep(clk->ena_gpio, 0); - gpiod_set_value_cansleep(clk->led_gpio, 0); } static int skl_int3472_clk_enable(struct clk_hw *hw) diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h index 53270d19c73a..82dc37e08882 100644 --- a/drivers/platform/x86/intel/int3472/common.h +++ b/drivers/platform/x86/intel/int3472/common.h @@ -6,6 +6,7 @@ #include #include +#include #include #include #include @@ -28,6 +29,8 @@ #define GPIO_REGULATOR_NAME_LENGTH 21 #define GPIO_REGULATOR_SUPPLY_NAME_LENGTH 9 +#define INT3472_LED_MAX_NAME_LEN 32 + #define CIO2_SENSOR_SSDB_MCLKSPEED_OFFSET 86 #define INT3472_REGULATOR(_name, _supply, _ops) \ @@ -96,10 +99,16 @@ struct int3472_discrete_device { struct clk_hw clk_hw; struct clk_lookup *cl; struct gpio_desc *ena_gpio; - struct gpio_desc *led_gpio; u32 frequency; } clock; + struct int3472_pled { + struct led_classdev classdev; + struct led_lookup_data lookup; + char name[INT3472_LED_MAX_NAME_LEN]; + struct gpio_desc *gpio; + } pled; + unsigned int ngpios; /* how many GPIOs have we seen */ unsigned int n_sensor_gpios; /* how many have we mapped to sensor */ struct gpiod_lookup_table gpios; @@ -119,4 +128,8 @@ int skl_int3472_register_regulator(struct int3472_discrete_device *int3472, struct acpi_resource_gpio *agpio); void skl_int3472_unregister_regulator(struct int3472_discrete_device *int3472); +int skl_int3472_register_pled(struct int3472_discrete_device *int3472, + struct acpi_resource_gpio *agpio, u32 polarity); +void skl_int3472_unregister_pled(struct int3472_discrete_device *int3472); + #endif diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c index 708d51f9b41d..38b1372e0745 100644 --- a/drivers/platform/x86/intel/int3472/discrete.c +++ b/drivers/platform/x86/intel/int3472/discrete.c @@ -155,37 +155,21 @@ static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int347 } static int skl_int3472_map_gpio_to_clk(struct int3472_discrete_device *int3472, - struct acpi_resource_gpio *agpio, u8 type) + struct acpi_resource_gpio *agpio) { char *path = agpio->resource_source.string_ptr; u16 pin = agpio->pin_table[0]; struct gpio_desc *gpio; - switch (type) { - case INT3472_GPIO_TYPE_CLK_ENABLE: - gpio = acpi_get_and_request_gpiod(path, pin, "int3472,clk-enable"); - if (IS_ERR(gpio)) - return (PTR_ERR(gpio)); - - int3472->clock.ena_gpio = gpio; - /* Ensure the pin is in output mode and non-active state */ - gpiod_direction_output(int3472->clock.ena_gpio, 0); - break; - case INT3472_GPIO_TYPE_PRIVACY_LED: - gpio = acpi_get_and_request_gpiod(path, pin, "int3472,privacy-led"); - if (IS_ERR(gpio)) - return (PTR_ERR(gpio)); + gpio = acpi_get_and_request_gpiod(path, pin, "int3472,clk-enable"); + if (IS_ERR(gpio)) + return (PTR_ERR(gpio)); - int3472->clock.led_gpio = gpio; - /* Ensure the pin is in output mode and non-active state */ - gpiod_direction_output(int3472->clock.led_gpio, 0); - break; - default: - dev_err(int3472->dev, "Invalid GPIO type 0x%02x for clock\n", type); - break; - } + int3472->clock.ena_gpio = gpio; + /* Ensure the pin is in output mode and non-active state */ + gpiod_direction_output(int3472->clock.ena_gpio, 0); - return 0; + return skl_int3472_register_clock(int3472); } static void int3472_get_func_and_polarity(u8 type, const char **func, u32 *polarity) @@ -293,11 +277,16 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, break; case INT3472_GPIO_TYPE_CLK_ENABLE: - case INT3472_GPIO_TYPE_PRIVACY_LED: - ret = skl_int3472_map_gpio_to_clk(int3472, agpio, type); + ret = skl_int3472_map_gpio_to_clk(int3472, agpio); if (ret) err_msg = "Failed to map GPIO to clock\n"; + break; + case INT3472_GPIO_TYPE_PRIVACY_LED: + ret = skl_int3472_register_pled(int3472, agpio, polarity); + if (ret) + err_msg = "Failed to register LED\n"; + break; case INT3472_GPIO_TYPE_POWER_ENABLE: ret = skl_int3472_register_regulator(int3472, agpio); @@ -341,21 +330,6 @@ static int skl_int3472_parse_crs(struct int3472_discrete_device *int3472) acpi_dev_free_resource_list(&resource_list); - /* - * If we find no clock enable GPIO pin then the privacy LED won't work. - * We've never seen that situation, but it's possible. Warn the user so - * it's clear what's happened. - */ - if (int3472->clock.ena_gpio) { - ret = skl_int3472_register_clock(int3472); - if (ret) - return ret; - } else { - if (int3472->clock.led_gpio) - dev_warn(int3472->dev, - "No clk GPIO. The privacy LED won't work\n"); - } - int3472->gpios.dev_id = int3472->sensor_name; gpiod_add_lookup_table(&int3472->gpios); @@ -372,8 +346,8 @@ static int skl_int3472_discrete_remove(struct platform_device *pdev) skl_int3472_unregister_clock(int3472); gpiod_put(int3472->clock.ena_gpio); - gpiod_put(int3472->clock.led_gpio); + skl_int3472_unregister_pled(int3472); skl_int3472_unregister_regulator(int3472); return 0; diff --git a/drivers/platform/x86/intel/int3472/led.c b/drivers/platform/x86/intel/int3472/led.c new file mode 100644 index 000000000000..251c6524458e --- /dev/null +++ b/drivers/platform/x86/intel/int3472/led.c @@ -0,0 +1,74 @@ +// SPDX-License-Identifier: GPL-2.0 +/* Author: Hans de Goede */ + +#include +#include +#include +#include "common.h" + +static int int3472_pled_set(struct led_classdev *led_cdev, + enum led_brightness brightness) +{ + struct int3472_discrete_device *int3472 = + container_of(led_cdev, struct int3472_discrete_device, pled.classdev); + + gpiod_set_value_cansleep(int3472->pled.gpio, brightness); + return 0; +} + +int skl_int3472_register_pled(struct int3472_discrete_device *int3472, + struct acpi_resource_gpio *agpio, u32 polarity) +{ + char *p, *path = agpio->resource_source.string_ptr; + int ret; + + if (int3472->pled.classdev.dev) + return -EBUSY; + + int3472->pled.gpio = acpi_get_and_request_gpiod(path, agpio->pin_table[0], + "int3472,privacy-led"); + if (IS_ERR(int3472->pled.gpio)) + return dev_err_probe(int3472->dev, PTR_ERR(int3472->pled.gpio), + "getting privacy LED GPIO\n"); + + if (polarity == GPIO_ACTIVE_LOW) + gpiod_toggle_active_low(int3472->pled.gpio); + + /* Ensure the pin is in output mode and non-active state */ + gpiod_direction_output(int3472->pled.gpio, 0); + + /* Generate the name, replacing the ':' in the ACPI devname with '_' */ + snprintf(int3472->pled.name, sizeof(int3472->pled.name), + "%s::privacy_led", acpi_dev_name(int3472->sensor)); + p = strchr(int3472->pled.name, ':'); + *p = '_'; + + int3472->pled.classdev.name = int3472->pled.name; + int3472->pled.classdev.max_brightness = 1; + int3472->pled.classdev.brightness_set_blocking = int3472_pled_set; + + ret = led_classdev_register(int3472->dev, &int3472->pled.classdev); + if (ret) + goto err_free_gpio; + + int3472->pled.lookup.provider = int3472->pled.name; + int3472->pled.lookup.dev_id = int3472->sensor_name; + int3472->pled.lookup.con_id = "privacy-led"; + led_add_lookup(&int3472->pled.lookup); + + return 0; + +err_free_gpio: + gpiod_put(int3472->pled.gpio); + return ret; +} + +void skl_int3472_unregister_pled(struct int3472_discrete_device *int3472) +{ + if (IS_ERR_OR_NULL(int3472->pled.classdev.dev)) + return; + + led_remove_lookup(&int3472->pled.lookup); + led_classdev_unregister(&int3472->pled.classdev); + gpiod_put(int3472->pled.gpio); +} From patchwork Fri Jan 20 11:45:23 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 645852 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 0504FC38A23 for ; 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Fri, 20 Jan 2023 06:46:12 -0500 X-MC-Unique: qV5XCC9DPXqCKrrnMA4iqA-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 3A03E858F09; Fri, 20 Jan 2023 11:46:11 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id 8D94D140EBF6; Fri, 20 Jan 2023 11:46:08 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v5 10/11] platform/x86: int3472/discrete: Move GPIO request to skl_int3472_register_clock() Date: Fri, 20 Jan 2023 12:45:23 +0100 Message-Id: <20230120114524.408368-11-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org Move the requesting of the clk-enable GPIO to skl_int3472_register_clock() (and move the gpiod_put to unregister). This mirrors the GPIO handling in skl_int3472_register_regulator() and allows removing skl_int3472_map_gpio_to_clk() from discrete.c. Signed-off-by: Hans de Goede --- .../x86/intel/int3472/clk_and_regulator.c | 28 +++++++++++++++-- drivers/platform/x86/intel/int3472/common.h | 3 +- drivers/platform/x86/intel/int3472/discrete.c | 30 ++----------------- 3 files changed, 30 insertions(+), 31 deletions(-) diff --git a/drivers/platform/x86/intel/int3472/clk_and_regulator.c b/drivers/platform/x86/intel/int3472/clk_and_regulator.c index e3b597d93388..626e5e86f4e0 100644 --- a/drivers/platform/x86/intel/int3472/clk_and_regulator.c +++ b/drivers/platform/x86/intel/int3472/clk_and_regulator.c @@ -86,18 +86,34 @@ static const struct clk_ops skl_int3472_clock_ops = { .recalc_rate = skl_int3472_clk_recalc_rate, }; -int skl_int3472_register_clock(struct int3472_discrete_device *int3472) +int skl_int3472_register_clock(struct int3472_discrete_device *int3472, + struct acpi_resource_gpio *agpio) { + char *path = agpio->resource_source.string_ptr; struct clk_init_data init = { .ops = &skl_int3472_clock_ops, .flags = CLK_GET_RATE_NOCACHE, }; int ret; + if (int3472->clock.cl) + return -EBUSY; + + int3472->clock.ena_gpio = acpi_get_and_request_gpiod(path, agpio->pin_table[0], + "int3472,clk-enable"); + if (IS_ERR(int3472->clock.ena_gpio)) + return dev_err_probe(int3472->dev, PTR_ERR(int3472->clock.ena_gpio), + "getting clk-enable GPIO\n"); + + /* Ensure the pin is in output mode and non-active state */ + gpiod_direction_output(int3472->clock.ena_gpio, 0); + init.name = kasprintf(GFP_KERNEL, "%s-clk", acpi_dev_name(int3472->adev)); - if (!init.name) - return -ENOMEM; + if (!init.name) { + ret = -ENOMEM; + goto out_put_gpio; + } int3472->clock.frequency = skl_int3472_get_clk_frequency(int3472); @@ -123,14 +139,20 @@ int skl_int3472_register_clock(struct int3472_discrete_device *int3472) clk_unregister(int3472->clock.clk); out_free_init_name: kfree(init.name); +out_put_gpio: + gpiod_put(int3472->clock.ena_gpio); return ret; } void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472) { + if (!int3472->clock.cl) + return; + clkdev_drop(int3472->clock.cl); clk_unregister(int3472->clock.clk); + gpiod_put(int3472->clock.ena_gpio); } int skl_int3472_register_regulator(struct int3472_discrete_device *int3472, diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h index 82dc37e08882..0d4fa7d00b5f 100644 --- a/drivers/platform/x86/intel/int3472/common.h +++ b/drivers/platform/x86/intel/int3472/common.h @@ -121,7 +121,8 @@ int skl_int3472_get_sensor_adev_and_name(struct device *dev, struct acpi_device **sensor_adev_ret, const char **name_ret); -int skl_int3472_register_clock(struct int3472_discrete_device *int3472); +int skl_int3472_register_clock(struct int3472_discrete_device *int3472, + struct acpi_resource_gpio *agpio); void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472); int skl_int3472_register_regulator(struct int3472_discrete_device *int3472, diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c index 38b1372e0745..b7752c2b798d 100644 --- a/drivers/platform/x86/intel/int3472/discrete.c +++ b/drivers/platform/x86/intel/int3472/discrete.c @@ -2,8 +2,6 @@ /* Author: Dan Scally */ #include -#include -#include #include #include #include @@ -154,24 +152,6 @@ static int skl_int3472_map_gpio_to_sensor(struct int3472_discrete_device *int347 return 0; } -static int skl_int3472_map_gpio_to_clk(struct int3472_discrete_device *int3472, - struct acpi_resource_gpio *agpio) -{ - char *path = agpio->resource_source.string_ptr; - u16 pin = agpio->pin_table[0]; - struct gpio_desc *gpio; - - gpio = acpi_get_and_request_gpiod(path, pin, "int3472,clk-enable"); - if (IS_ERR(gpio)) - return (PTR_ERR(gpio)); - - int3472->clock.ena_gpio = gpio; - /* Ensure the pin is in output mode and non-active state */ - gpiod_direction_output(int3472->clock.ena_gpio, 0); - - return skl_int3472_register_clock(int3472); -} - static void int3472_get_func_and_polarity(u8 type, const char **func, u32 *polarity) { switch (type) { @@ -277,9 +257,9 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, break; case INT3472_GPIO_TYPE_CLK_ENABLE: - ret = skl_int3472_map_gpio_to_clk(int3472, agpio); + ret = skl_int3472_register_clock(int3472, agpio); if (ret) - err_msg = "Failed to map GPIO to clock\n"; + err_msg = "Failed to register clock\n"; break; case INT3472_GPIO_TYPE_PRIVACY_LED: @@ -342,11 +322,7 @@ static int skl_int3472_discrete_remove(struct platform_device *pdev) gpiod_remove_lookup_table(&int3472->gpios); - if (int3472->clock.cl) - skl_int3472_unregister_clock(int3472); - - gpiod_put(int3472->clock.ena_gpio); - + skl_int3472_unregister_clock(int3472); skl_int3472_unregister_pled(int3472); skl_int3472_unregister_regulator(int3472); From patchwork Fri Jan 20 11:45:24 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Hans de Goede X-Patchwork-Id: 644853 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 029A2C27C76 for ; Fri, 20 Jan 2023 11:48:03 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S230018AbjATLsA (ORCPT ); Fri, 20 Jan 2023 06:48:00 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55576 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230037AbjATLr4 (ORCPT ); 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Fri, 20 Jan 2023 06:46:15 -0500 X-MC-Unique: gJBgeTxrOQqB1DuMFG4LFQ-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 84801101A521; Fri, 20 Jan 2023 11:46:14 +0000 (UTC) Received: from shalem.redhat.com (unknown [10.39.195.101]) by smtp.corp.redhat.com (Postfix) with ESMTP id AE8A8140EBF6; Fri, 20 Jan 2023 11:46:11 +0000 (UTC) From: Hans de Goede To: Mark Gross , Andy Shevchenko , Pavel Machek , Lee Jones , Linus Walleij , Daniel Scally , Laurent Pinchart , Mauro Carvalho Chehab , Sakari Ailus Cc: Hans de Goede , platform-driver-x86@vger.kernel.org, linux-leds@vger.kernel.org, linux-gpio@vger.kernel.org, Kate Hsuan , Mark Pearson , Andy Yeh , Hao Yao , linux-media@vger.kernel.org Subject: [PATCH v5 11/11] platform/x86: int3472/discrete: Get the polarity from the _DSM entry Date: Fri, 20 Jan 2023 12:45:24 +0100 Message-Id: <20230120114524.408368-12-hdegoede@redhat.com> In-Reply-To: <20230120114524.408368-1-hdegoede@redhat.com> References: <20230120114524.408368-1-hdegoede@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Precedence: bulk List-ID: X-Mailing-List: linux-leds@vger.kernel.org According to: https://github.com/intel/ipu6-drivers/blob/master/patch/int3472-support-independent-clock-and-LED-gpios-5.17%2B.patch Bits 31-24 of the _DSM pin entry integer value codes the active-value, that is the actual physical signal (0 or 1) which needs to be output on the pin to turn the sensor chip on (to make it active). So if bits 31-24 are 0 for a reset pin, then the actual value of the reset pin needs to be 0 to take the chip out of reset. IOW in this case the reset signal is active-high rather then the default active-low. And if bits 31-24 are 0 for a clk-en pin then the actual value of the clk pin needs to be 0 to enable the clk. So in this case the clk-en signal is active-low rather then the default active-high. IOW if bits 31-24 are 0 for a pin, then the default polarity of the pin is inverted. Add a check for this and also propagate this new polarity to the clock registration. Signed-off-by: Hans de Goede --- .../platform/x86/intel/int3472/clk_and_regulator.c | 5 ++++- drivers/platform/x86/intel/int3472/common.h | 2 +- drivers/platform/x86/intel/int3472/discrete.c | 13 +++++++++++-- 3 files changed, 16 insertions(+), 4 deletions(-) diff --git a/drivers/platform/x86/intel/int3472/clk_and_regulator.c b/drivers/platform/x86/intel/int3472/clk_and_regulator.c index 626e5e86f4e0..1086c3d83494 100644 --- a/drivers/platform/x86/intel/int3472/clk_and_regulator.c +++ b/drivers/platform/x86/intel/int3472/clk_and_regulator.c @@ -87,7 +87,7 @@ static const struct clk_ops skl_int3472_clock_ops = { }; int skl_int3472_register_clock(struct int3472_discrete_device *int3472, - struct acpi_resource_gpio *agpio) + struct acpi_resource_gpio *agpio, u32 polarity) { char *path = agpio->resource_source.string_ptr; struct clk_init_data init = { @@ -105,6 +105,9 @@ int skl_int3472_register_clock(struct int3472_discrete_device *int3472, return dev_err_probe(int3472->dev, PTR_ERR(int3472->clock.ena_gpio), "getting clk-enable GPIO\n"); + if (polarity == GPIO_ACTIVE_LOW) + gpiod_toggle_active_low(int3472->clock.ena_gpio); + /* Ensure the pin is in output mode and non-active state */ gpiod_direction_output(int3472->clock.ena_gpio, 0); diff --git a/drivers/platform/x86/intel/int3472/common.h b/drivers/platform/x86/intel/int3472/common.h index 0d4fa7d00b5f..61688e450ce5 100644 --- a/drivers/platform/x86/intel/int3472/common.h +++ b/drivers/platform/x86/intel/int3472/common.h @@ -122,7 +122,7 @@ int skl_int3472_get_sensor_adev_and_name(struct device *dev, const char **name_ret); int skl_int3472_register_clock(struct int3472_discrete_device *int3472, - struct acpi_resource_gpio *agpio); + struct acpi_resource_gpio *agpio, u32 polarity); void skl_int3472_unregister_clock(struct int3472_discrete_device *int3472); int skl_int3472_register_regulator(struct int3472_discrete_device *int3472, diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c index b7752c2b798d..96963e30ab6c 100644 --- a/drivers/platform/x86/intel/int3472/discrete.c +++ b/drivers/platform/x86/intel/int3472/discrete.c @@ -220,11 +220,11 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, struct int3472_discrete_device *int3472 = data; struct acpi_resource_gpio *agpio; union acpi_object *obj; + u8 active_value, type; const char *err_msg; const char *func; u32 polarity; int ret; - u8 type; if (!acpi_gpio_get_io_resource(ares, &agpio)) return 1; @@ -248,6 +248,15 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, int3472_get_func_and_polarity(type, &func, &polarity); + /* If bits 31-24 of the _DSM entry are all 0 then the signal is inverted */ + active_value = obj->integer.value >> 24; + if (!active_value) + polarity ^= GPIO_ACTIVE_LOW; + + dev_dbg(int3472->dev, "%s %s pin %d active-%s\n", func, + agpio->resource_source.string_ptr, agpio->pin_table[0], + (polarity == GPIO_ACTIVE_HIGH) ? "high" : "low"); + switch (type) { case INT3472_GPIO_TYPE_RESET: case INT3472_GPIO_TYPE_POWERDOWN: @@ -257,7 +266,7 @@ static int skl_int3472_handle_gpio_resources(struct acpi_resource *ares, break; case INT3472_GPIO_TYPE_CLK_ENABLE: - ret = skl_int3472_register_clock(int3472, agpio); + ret = skl_int3472_register_clock(int3472, agpio, polarity); if (ret) err_msg = "Failed to register clock\n";