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| author |   Andrey Smirnov <andrew.smirnov@gmail.com> | 2017-12-20 22:51:15 -0800 |
|---|---|---|
| committer |   Lee Jones <lee.jones@linaro.org> | 2018-01-08 10:08:34 +0000 |
| commit | 2cb67d20cdea1f4da60bbe073d32bd2ba11c22ad (patch) | |
| tree | ac8cdcf7bc28551c03dc2d8282e4500836c14eea /drivers/tty | |
| parent | serdev: Make .remove in struct serdev_device_driver optional (diff) | |
| download | linux-dev-2cb67d20cdea1f4da60bbe073d32bd2ba11c22ad.tar.xz linux-dev-2cb67d20cdea1f4da60bbe073d32bd2ba11c22ad.zip | |
serdev: Introduce devm_serdev_device_open()
Add code implementing managed version of serdev_device_open() for
serdev device drivers that "open" the device during driver's lifecycle
only once (e.g. opened in .probe() and closed in .remove()).
Acked-by: Philippe Ombredanne <pombredanne@nexb.com>
Acked-by: Pavel Machek <pavel@ucw.cz>
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Sebastian Reichel <sebastian.reichel@collabora.co.uk>
Reviewed-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Andrey Smirnov <andrew.smirnov@gmail.com>
Signed-off-by: Lee Jones <lee.jones@linaro.org>
Diffstat (limited to 'drivers/tty')
| -rw-r--r-- | drivers/tty/serdev/core.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 34050b439c1f..28133dbd2808 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -132,6 +132,33 @@ void serdev_device_close(struct serdev_device *serdev) } EXPORT_SYMBOL_GPL(serdev_device_close); +static void devm_serdev_device_release(struct device *dev, void *dr) +{ + serdev_device_close(*(struct serdev_device **)dr); +} + +int devm_serdev_device_open(struct device *dev, struct serdev_device *serdev) +{ + struct serdev_device **dr; + int ret; + + dr = devres_alloc(devm_serdev_device_release, sizeof(*dr), GFP_KERNEL); + if (!dr) + return -ENOMEM; + + ret = serdev_device_open(serdev); + if (ret) { + devres_free(dr); + return ret; + } + + *dr = serdev; + devres_add(dev, dr); + + return 0; +} +EXPORT_SYMBOL_GPL(devm_serdev_device_open); + void serdev_device_write_wakeup(struct serdev_device *serdev) { complete(&serdev->write_comp); |