Messages in this thread Patch in this message | | | From | Ricardo Ribalda Delgado <> | Subject | [PATCH v2 08/24] serdev: Provide modalias attribute for modalias devices | Date | Mon, 11 Jun 2018 13:52:24 +0200 |
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Create modalias sysfs attribute for modalias devices. This is required by modprobe/udev to autoload the serdev driver.
Eg: root@qt5022:~# cat /sys/bus/serial/devices/serial1-0/modalias serdev:ttydev
Cc: Rob Herring <robh@kernel.org> Cc: Johan Hovold <johan@kernel.org> Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Cc: Jiri Slaby <jslaby@suse.com> Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com> --- drivers/tty/serdev/core.c | 7 ++++++- 1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/tty/serdev/core.c b/drivers/tty/serdev/core.c index 5df01d8cf307..b9bb0c0ee319 100644 --- a/drivers/tty/serdev/core.c +++ b/drivers/tty/serdev/core.c @@ -23,12 +23,17 @@ static ssize_t modalias_show(struct device *dev, struct device_attribute *attr, char *buf) { int len; + struct serdev_device *serdev = to_serdev_device(dev); len = acpi_device_modalias(dev, buf, PAGE_SIZE - 1); if (len != -ENODEV) return len; - return of_device_modalias(dev, buf, PAGE_SIZE); + len = of_device_modalias(dev, buf, PAGE_SIZE); + if (len != -ENODEV) + return len; + + return sprintf(buf, "%s%s\n", SERDEV_MODULE_PREFIX, serdev->modalias); } static DEVICE_ATTR_RO(modalias); -- 2.17.1
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