From: Silesh C V <svellattu@mvista.com> To: Greg Kroah-Hartman <gregkh@linuxfoundation.org>, "Rafael J. Wysocki" <rafael@kernel.org> Cc: linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-i2c@vger.kernel.org, linux-rdma@vger.kernel.org, netdev@vger.kernel.org, devicetree@vger.kernel.org, linux-spi@vger.kernel.org, Mathieu Poirier <mathieu.poirier@linaro.org>, Wolfram Sang <wsa@the-dreams.de>, Lijun Ou <oulijun@huawei.com>, "Wei Hu(Xavier)" <xavier.huwei@huawei.com>, Yisen Zhuang <yisen.zhuang@huawei.com>, Salil Mehta <salil.mehta@huawei.com>, Srinivas Kandagatla <srinivas.kandagatla@linaro.org>, Andrew Lunn <andrew@lunn.ch>, Florian Fainelli <f.fainelli@gmail.com>, Rob Herring <robh+dt@kernel.org>, Frank Rowand <frowand.list@gmail.com>, Mark Brown <broonie@kernel.org>, "David S. Miller" <davem@davemloft.net>, Silesh C V <svellattu@mvista.com> Subject: [PATCH v3 1/2] Driver core: add bus_find_device_by_fwnode Date: Tue, 9 Oct 2018 15:47:24 +0530 [thread overview] Message-ID: <1539080245-25818-1-git-send-email-svellattu@mvista.com> (raw) Some drivers need to find the device on a bus having a specific firmware node. Currently, such drivers have their own implementations to do this. Provide a helper similar to bus_find_device_by_name so that each driver does not have to reinvent this. Signed-off-by: Silesh C V <svellattu@mvista.com> --- Changes since v2: - make use of dev_fwnode in match_fwnode. drivers/base/bus.c | 20 ++++++++++++++++++++ include/linux/device.h | 3 +++ 2 files changed, 23 insertions(+) diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 8bfd27e..a2f39db 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -17,6 +17,7 @@ #include <linux/string.h> #include <linux/mutex.h> #include <linux/sysfs.h> +#include <linux/property.h> #include "base.h" #include "power/power.h" @@ -373,6 +374,25 @@ struct device *bus_find_device_by_name(struct bus_type *bus, } EXPORT_SYMBOL_GPL(bus_find_device_by_name); +static int match_fwnode(struct device *dev, void *fwnode) +{ + return dev_fwnode(dev) == fwnode; +} + +/** + * bus_find_device_by_fwnode - device iterator for locating a particular device + * having a specific firmware node + * @bus: bus type + * @start: Device to begin with + * @fwnode: firmware node of the device to match + */ +struct device *bus_find_device_by_fwnode(struct bus_type *bus, struct device *start, + struct fwnode_handle *fwnode) +{ + return bus_find_device(bus, start, (void *)fwnode, match_fwnode); +} +EXPORT_SYMBOL_GPL(bus_find_device_by_fwnode); + /** * subsys_find_device_by_id - find a device with a specific enumeration number * @subsys: subsystem diff --git a/include/linux/device.h b/include/linux/device.h index 8f88254..09384f6 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -171,6 +171,9 @@ struct device *bus_find_device(struct bus_type *bus, struct device *start, struct device *bus_find_device_by_name(struct bus_type *bus, struct device *start, const char *name); +struct device *bus_find_device_by_fwnode(struct bus_type *bus, + struct device *start, + struct fwnode_handle *fwnode); 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, -- 1.9.1
WARNING: multiple messages have this Message-ID (diff)
From: svellattu@mvista.com (Silesh C V) To: linux-arm-kernel@lists.infradead.org Subject: [PATCH v3 1/2] Driver core: add bus_find_device_by_fwnode Date: Tue, 9 Oct 2018 15:47:24 +0530 [thread overview] Message-ID: <1539080245-25818-1-git-send-email-svellattu@mvista.com> (raw) Some drivers need to find the device on a bus having a specific firmware node. Currently, such drivers have their own implementations to do this. Provide a helper similar to bus_find_device_by_name so that each driver does not have to reinvent this. Signed-off-by: Silesh C V <svellattu@mvista.com> --- Changes since v2: - make use of dev_fwnode in match_fwnode. drivers/base/bus.c | 20 ++++++++++++++++++++ include/linux/device.h | 3 +++ 2 files changed, 23 insertions(+) diff --git a/drivers/base/bus.c b/drivers/base/bus.c index 8bfd27e..a2f39db 100644 --- a/drivers/base/bus.c +++ b/drivers/base/bus.c @@ -17,6 +17,7 @@ #include <linux/string.h> #include <linux/mutex.h> #include <linux/sysfs.h> +#include <linux/property.h> #include "base.h" #include "power/power.h" @@ -373,6 +374,25 @@ struct device *bus_find_device_by_name(struct bus_type *bus, } EXPORT_SYMBOL_GPL(bus_find_device_by_name); +static int match_fwnode(struct device *dev, void *fwnode) +{ + return dev_fwnode(dev) == fwnode; +} + +/** + * bus_find_device_by_fwnode - device iterator for locating a particular device + * having a specific firmware node + * @bus: bus type + * @start: Device to begin with + * @fwnode: firmware node of the device to match + */ +struct device *bus_find_device_by_fwnode(struct bus_type *bus, struct device *start, + struct fwnode_handle *fwnode) +{ + return bus_find_device(bus, start, (void *)fwnode, match_fwnode); +} +EXPORT_SYMBOL_GPL(bus_find_device_by_fwnode); + /** * subsys_find_device_by_id - find a device with a specific enumeration number * @subsys: subsystem diff --git a/include/linux/device.h b/include/linux/device.h index 8f88254..09384f6 100644 --- a/include/linux/device.h +++ b/include/linux/device.h @@ -171,6 +171,9 @@ struct device *bus_find_device(struct bus_type *bus, struct device *start, struct device *bus_find_device_by_name(struct bus_type *bus, struct device *start, const char *name); +struct device *bus_find_device_by_fwnode(struct bus_type *bus, + struct device *start, + struct fwnode_handle *fwnode); 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, -- 1.9.1
next reply other threads:[~2018-10-09 10:17 UTC|newest] Thread overview: 38+ messages / expand[flat|nested] mbox.gz Atom feed top 2018-10-09 10:17 Silesh C V [this message] 2018-10-09 10:17 ` [PATCH v3 1/2] Driver core: add bus_find_device_by_fwnode Silesh C V 2018-10-09 10:17 ` [PATCH v3 2/2] treewide: use bus_find_device_by_fwnode Silesh C V 2018-10-09 10:17 ` Silesh C V 2018-10-09 17:44 ` Mathieu Poirier 2018-10-09 17:44 ` Mathieu Poirier 2018-10-10 2:58 ` Silesh C V 2018-10-10 2:58 ` Silesh C V 2018-10-10 19:05 ` Rob Herring 2018-10-10 19:05 ` Rob Herring 2018-10-10 19:05 ` Rob Herring 2018-10-10 19:05 ` Rob Herring 2018-10-09 10:20 ` [PATCH v3 1/2] Driver core: add bus_find_device_by_fwnode Rafael J. Wysocki 2018-10-09 10:20 ` Rafael J. Wysocki 2018-10-09 10:20 ` Rafael J. Wysocki 2018-10-09 10:20 ` Rafael J. Wysocki 2018-10-09 11:02 ` Wolfram Sang 2018-10-09 11:02 ` Wolfram Sang 2018-10-09 11:02 ` Wolfram Sang 2018-10-09 15:15 ` Mark Brown 2018-10-09 15:15 ` Mark Brown 2018-10-09 15:15 ` Mark Brown 2018-10-09 15:15 ` Mark Brown 2018-10-10 2:49 ` Silesh C V 2018-10-10 2:49 ` Silesh C V 2018-10-10 2:49 ` Silesh C V 2018-10-09 17:27 ` Mathieu Poirier 2018-10-09 17:27 ` Mathieu Poirier 2018-10-09 17:39 ` Rafael J. Wysocki 2018-10-09 17:39 ` Rafael J. Wysocki 2018-10-09 17:39 ` Rafael J. Wysocki 2018-10-09 17:39 ` Rafael J. Wysocki 2018-10-09 17:48 ` Mathieu Poirier 2018-10-09 17:48 ` Mathieu Poirier 2018-10-09 17:48 ` Mathieu Poirier 2018-10-09 17:48 ` Mathieu Poirier 2018-10-10 2:55 ` Silesh C V 2018-10-10 2:55 ` Silesh C V
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