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authorAndrey Smirnov <andrew.smirnov@gmail.com>2017-12-21 09:51:15 +0300
committerLee Jones <lee.jones@linaro.org>2018-01-08 13:08:34 +0300
commit2cb67d20cdea1f4da60bbe073d32bd2ba11c22ad (patch)
treeac8cdcf7bc28551c03dc2d8282e4500836c14eea /drivers/tty
parentc5ff7de262b6e92ec88a20ea0a0244c29ccdc764 (diff)
downloadlinux-2cb67d20cdea1f4da60bbe073d32bd2ba11c22ad.tar.xz
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.c27
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);