linux-kernel - [PATCH v2 08/28] drivers: Add generic helper to match by device type

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Message-Id: <1560534863-15115-9-git-send-email-suzuki.poulose@arm.com>
Date:   Fri, 14 Jun 2019 18:54:03 +0100
From:   Suzuki K Poulose <suzuki.poulose@....com>
To:     linux-kernel@...r.kernel.org
Cc:     gregkh@...uxfoundation.org, rafael@...nel.org,
        suzuki.poulose@....com,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Arnd Bergmann <arnd@...db.de>,
        Harald Freudenberger <freude@...ux.ibm.com>,
        Heiko Carstens <heiko.carstens@...ibm.com>,
        linux-usb@...r.kernel.org, Oliver Neukum <oneukum@...e.com>,
        Sebastian Andrzej Siewior <bigeasy@...utronix.de>,
        Tomas Winkler <tomas.winkler@...el.com>,
        Ulf Hansson <ulf.hansson@...aro.org>,
        Joe Perches <joe@...ches.com>
Subject: [PATCH v2 08/28] drivers: Add generic helper to match by device type

Add a helper to match a device by its type. This will be used
later for providing wrappers to the device iterators for bus/class/driver.

Cc: Alexander Shishkin <alexander.shishkin@...ux.intel.com>
Cc: Arnd Bergmann <arnd@...db.de>
Cc: Harald Freudenberger <freude@...ux.ibm.com>
Cc: Heiko Carstens <heiko.carstens@...ibm.com>
Cc: linux-usb@...r.kernel.org
Cc: Oliver Neukum <oneukum@...e.com>
Cc: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: Tomas Winkler <tomas.winkler@...el.com>
Cc: "Rafael J. Wysocki" <rafael@...nel.org>
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Cc: Ulf Hansson <ulf.hansson@...aro.org>
Cc: Joe Perches <joe@...ches.com>
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 efcdb96..b827ca1 100644
--- a/drivers/base/core.c
+++ b/drivers/base/core.c
@@ -3340,3 +3340,9 @@ int device_match_fwnode(struct device *dev, const void *fwnode)
 	return dev_fwnode(dev) == fwnode;
 }
 EXPORT_SYMBOL_GPL(device_match_fwnode);
+
+int device_match_devt(struct device *dev, const void *pdevt)
+{
+	return dev->devt == *(dev_t *)pdevt;
+}
+EXPORT_SYMBOL_GPL(device_match_devt);
diff --git a/include/linux/device.h b/include/linux/device.h
index 08aa087..f315692 100644
--- a/include/linux/device.h
+++ b/include/linux/device.h
@@ -165,6 +165,7 @@ 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 bus_for_each_dev(struct bus_type *bus, struct device *start, void *data,
 		     int (*fn)(struct device *dev, void *data));
-- 
2.7.4