From patchwork Tue Jul 23 22:18:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Suzuki K Poulose X-Patchwork-Id: 169573 Delivered-To: patch@linaro.org Received: by 2002:a92:4782:0:0:0:0:0 with SMTP id e2csp9412837ilk; Tue, 23 Jul 2019 15:19:23 -0700 (PDT) X-Google-Smtp-Source: APXvYqyaKDl6FF9xbx9+mOlGP7VZWy0oJ9DLACn59ftvSBqJn6lfme6BZZDDUzV+uHpLiqwDI6K6 X-Received: by 2002:a62:3283:: with SMTP id y125mr8098947pfy.83.1563920363583; Tue, 23 Jul 2019 15:19:23 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1563920363; cv=none; d=google.com; s=arc-20160816; b=r7w3xE6cHZWkOQPWdC1kbZi3cQNt+sykFx3FHS0XIgt318mu7PdY+FsO5duFIxq/EY daVuK+DJ5J8uPTBxVtraD3GouOze1Vnwn5pw9Sf/bVm98RSmZ7/JXuWM7+Bgibdcf1um E9ZxYy52Id4UoQ1MNY9EcXavs8IRooMfSobEtrJcBBkGo2b4iqx1wl+JKEfKgWy0tcdk PES2gQOtzJoJodoekvvskFZYOrod0yl1YnWvu/uPJXxuMfmIyr8k4EL3LlYKuIXur6nV rJPrJ2YWsQg0AtELfQm5+Vh6QO5UElA4o1nmvbhT/bu90Tn4XsF8B5tdBQQIkRcWgviu wQgQ== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding:mime-version :references:in-reply-to:message-id:date:subject:cc:to:from; bh=3T2mbJsu96DTmP9e5C4MQDc2l0Xo95wI1l5s4sQegBU=; b=vz3S7eQFr03uI1joypWRwuWfSmmn/uf6u34MAp9UICkV3/LE0Eeq5iq+DZJMwFKtF7 UvCtDe4OM+Mc9ebUyM6j/XFmUEGqVGWgdfdTta3UZiLgOVJbAt9NYk++ixbWlDszOFht +l/CpgOTkc+JVnxbdyLrBKaYax4IjdTnWyso63BUqfuDQDWoeFXEBvW/BVkpo7VbWxhw 7yrjWIlbw90J8EjqenhqSyniUZGg0hm/gxAcfBdztVD3IBJzjiTi33pjGsbRGbKJSLvv QKDwmCUm6B7yN98E0TdabrPDGmrxgOxLnoNPm4WG06r6uLWts1ZdPbHEIppEWcQJF7nT DO7g== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-spi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-spi-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id 4si13244401pgo.198.2019.07.23.15.19.23; Tue, 23 Jul 2019 15:19:23 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-spi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-spi-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-spi-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2392445AbfGWWTW (ORCPT + 1 other); Tue, 23 Jul 2019 18:19:22 -0400 Received: from foss.arm.com ([217.140.110.172]:60776 "EHLO foss.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2392434AbfGWWTV (ORCPT ); Tue, 23 Jul 2019 18:19:21 -0400 Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id 5E61F1684; Tue, 23 Jul 2019 15:19:20 -0700 (PDT) Received: from dawn-kernel.cambridge.arm.com (unknown [10.1.197.116]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPA id C7DCB3F694; Tue, 23 Jul 2019 15:19:18 -0700 (PDT) From: Suzuki K Poulose To: linux-kernel@vger.kernel.org Cc: gregkh@linuxfoundation.org, rafael@kernel.org, linux-arm-kernel@lists.infradead.org, Suzuki K Poulose , Len Brown , linux-acpi@vger.kernel.org, linux-spi@vger.kernel.org, Mark Brown , Mika Westerberg , Wolfram Sang , linux-i2c@vger.kernel.org Subject: [PATCH v3 5/7] drivers: Introduce device lookup variants by ACPI_COMPANION device Date: Tue, 23 Jul 2019 23:18:36 +0100 Message-Id: <20190723221838.12024-6-suzuki.poulose@arm.com> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190723221838.12024-1-suzuki.poulose@arm.com> References: <20190723221838.12024-1-suzuki.poulose@arm.com> MIME-Version: 1.0 Sender: linux-spi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-spi@vger.kernel.org Add a generic helper to match a device by the ACPI_COMPANION device and provide wrappers for the device lookup APIs. Cc: Len Brown Cc: linux-acpi@vger.kernel.org Cc: linux-spi@vger.kernel.org Cc: Mark Brown Cc: Mika Westerberg Cc: Wolfram Sang Cc: linux-i2c@vger.kernel.org Cc: Mark Brown Cc: Greg Kroah-Hartman Cc: "Rafael J. Wysocki" Signed-off-by: Suzuki K Poulose --- drivers/base/core.c | 6 ++++ drivers/i2c/i2c-core-acpi.c | 11 ++----- drivers/spi/spi.c | 8 +---- include/linux/device.h | 65 +++++++++++++++++++++++++++++++++++++ 4 files changed, 74 insertions(+), 16 deletions(-) -- 2.21.0 Acked-by: Mark Brown Acked-by: Andy Shevchenko diff --git a/drivers/base/core.c b/drivers/base/core.c index 3abc32b60c0a..57d71bc2c559 100644 --- a/drivers/base/core.c +++ b/drivers/base/core.c @@ -3373,3 +3373,9 @@ int device_match_devt(struct device *dev, const void *pdevt) return dev->devt == *(dev_t *)pdevt; } EXPORT_SYMBOL_GPL(device_match_devt); + +int device_match_acpi_dev(struct device *dev, const void *adev) +{ + return ACPI_COMPANION(dev) == adev; +} +EXPORT_SYMBOL(device_match_acpi_dev); diff --git a/drivers/i2c/i2c-core-acpi.c b/drivers/i2c/i2c-core-acpi.c index 4dbbc9a35f65..bc80aafb521f 100644 --- a/drivers/i2c/i2c-core-acpi.c +++ b/drivers/i2c/i2c-core-acpi.c @@ -354,17 +354,11 @@ static int i2c_acpi_find_match_adapter(struct device *dev, const void *data) return ACPI_HANDLE(dev) == (acpi_handle)data; } -static int i2c_acpi_find_match_device(struct device *dev, const void *data) -{ - return ACPI_COMPANION(dev) == data; -} struct i2c_adapter *i2c_acpi_find_adapter_by_handle(acpi_handle handle) { - struct device *dev; + struct device *dev = bus_find_device_by_acpi_dev(&i2c_bus_type, handle); - dev = bus_find_device(&i2c_bus_type, NULL, handle, - i2c_acpi_find_match_adapter); return dev ? i2c_verify_adapter(dev) : NULL; } EXPORT_SYMBOL_GPL(i2c_acpi_find_adapter_by_handle); @@ -373,8 +367,7 @@ static struct i2c_client *i2c_acpi_find_client_by_adev(struct acpi_device *adev) { struct device *dev; - dev = bus_find_device(&i2c_bus_type, NULL, adev, - i2c_acpi_find_match_device); + dev = bus_find_device_by_acpi_dev(&i2c_bus_type, adev); return dev ? i2c_verify_client(dev) : NULL; } diff --git a/drivers/spi/spi.c b/drivers/spi/spi.c index a591da87981a..c486a6f84c2c 100644 --- a/drivers/spi/spi.c +++ b/drivers/spi/spi.c @@ -3741,11 +3741,6 @@ static int spi_acpi_controller_match(struct device *dev, const void *data) return ACPI_COMPANION(dev->parent) == data; } -static int spi_acpi_device_match(struct device *dev, const void *data) -{ - return ACPI_COMPANION(dev) == data; -} - static struct spi_controller *acpi_spi_find_controller_by_adev(struct acpi_device *adev) { struct device *dev; @@ -3765,8 +3760,7 @@ static struct spi_device *acpi_spi_find_device_by_adev(struct acpi_device *adev) { struct device *dev; - dev = bus_find_device(&spi_bus_type, NULL, adev, spi_acpi_device_match); - + dev = bus_find_device_by_acpi_dev(&spi_bus_type, adev); return dev ? to_spi_device(dev) : NULL; } diff --git a/include/linux/device.h b/include/linux/device.h index 93b2f55ef44e..7514ef3d3f1a 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -168,6 +168,7 @@ int device_match_name(struct device *dev, const void *name); int device_match_of_node(struct device *dev, const void *np); int device_match_fwnode(struct device *dev, const void *fwnode); int device_match_devt(struct device *dev, const void *pdevt); +int device_match_acpi_dev(struct device *dev, const void *adev); int bus_for_each_dev(struct bus_type *bus, struct device *start, void *data, int (*fn)(struct device *dev, void *data)); @@ -224,6 +225,28 @@ static inline struct device *bus_find_device_by_devt(struct bus_type *bus, return bus_find_device(bus, NULL, &devt, device_match_devt); } +#ifdef CONFIG_ACPI +struct acpi_device; + +/** + * bus_find_device_by_acpi_dev : device iterator for locating a particular device + * matching the ACPI COMPANION device. + * @bus: bus type + * @adev: ACPI COMPANION device to match. + */ +static inline struct device * +bus_find_device_by_acpi_dev(struct bus_type *bus, const struct acpi_device *adev) +{ + return bus_find_device(bus, NULL, adev, device_match_acpi_dev); +} +#else +static inline struct device * +bus_find_device_by_acpi_dev(struct bus_type *bus, const void *adev) +{ + return NULL; +} +#endif + struct device *subsys_find_device_by_id(struct bus_type *bus, unsigned int id, struct device *hint); int bus_for_each_drv(struct bus_type *bus, struct device_driver *start, @@ -442,6 +465,27 @@ static inline struct device *driver_find_device_by_devt(struct device_driver *dr return driver_find_device(drv, NULL, &devt, device_match_devt); } +#ifdef CONFIG_ACPI +/** + * driver_find_device_by_acpi_dev : device iterator for locating a particular + * device matching the ACPI_COMPANION device. + * @driver: the driver we're iterating + * @adev: ACPI_COMPANION device to match. + */ +static inline struct device * +driver_find_device_by_acpi_dev(struct device_driver *drv, + const struct acpi_device *adev) +{ + return driver_find_device(drv, NULL, adev, device_match_acpi_dev); +} +#else +static inline struct device * +driver_find_device_by_acpi_dev(struct device_driver *drv, const void *adev) +{ + return NULL; +} +#endif + void driver_deferred_probe_add(struct device *dev); int driver_deferred_probe_check_state(struct device *dev); int driver_deferred_probe_check_state_continue(struct device *dev); @@ -620,6 +664,27 @@ static inline struct device *class_find_device_by_devt(struct class *class, return class_find_device(class, NULL, &devt, device_match_devt); } +#ifdef CONFIG_ACPI +struct acpi_device; +/** + * class_find_device_by_acpi_dev : device iterator for locating a particular + * device matching the ACPI_COMPANION device. + * @class: class type + * @adev: ACPI_COMPANION device to match. + */ +static inline struct device * +class_find_device_by_acpi_dev(struct class *class, const struct acpi_device *adev) +{ + return class_find_device(class, NULL, adev, device_match_acpi_dev); +} +#else +static inline struct device * +class_find_device_by_acpi_dev(struct class *class, const void *adev) +{ + return NULL; +} +#endif + struct class_attribute { struct attribute attr; ssize_t (*show)(struct class *class, struct class_attribute *attr,