linux-kernel - [PATCH v2 09/28] drivers: Add generic match helper by ACPI

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Message-Id: <1560534863-15115-10-git-send-email-suzuki.poulose@arm.com>
Date:   Fri, 14 Jun 2019 18:54:04 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-kernel@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org,
        suzuki.poulose@....com, Len Brown <lenb@...nel.org>,
        linux-acpi@...r.kernel.org, linux-spi@...r.kernel.org,
        Mark Brown <broonie@...nel.org>
Subject: [PATCH v2 09/28] drivers: Add generic match helper by ACPI_COMPANION device

Add a generic helper to match a device by the ACPI_COMPANION device.
This will be later used for providing wrappers for
(bus/class/driver)_find_device().

Cc: Len Brown <lenb@...nel.org>
Cc: linux-acpi@...r.kernel.org
Cc: linux-spi@...r.kernel.org
Cc: Mark Brown <broonie@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Signed-off-by: Suzuki K Poulose <suzuki.poulose@....com>
---
 drivers/base/core.c    | 6 ++++++
 include/linux/device.h | 1 +
 2 files changed, 7 insertions(+)

diff --git a/drivers/base/core.c b/drivers/base/core.c
index b827ca1..597095b 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3346,3 +3346,9 @@ 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/include/linux/device.h b/include/linux/device.h
index f315692..a03b50d 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -166,6 +166,7 @@ void subsys_dev_iter_exit(struct subsys_dev_iter *iter);
 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));
-- 
2.7.4