Re: [PATCH] usb: misc: Driver for Yepkit YKUSH switchable hub
Hi, On Mon, Jan 19, 2015 at 10:38 PM, Greg KH g...@kroah.com wrote: That's great, and the hid parts of the patch makes sense, keeping the HID driver from binding to it, but for the rest, shouldn't that just be a simple userspace program instead? We don't like to add kernel drivers that can be done in userspace, and using usbfs/libusb should be really simple for this device from what the driver looks like. So, care to slim down the patch a bunch and resend? Sure, no problem. You want a patch containing only the HID-parts? My reason for adding this as a kernel driver was to ease usage of the device in scenarios where using libusb is not possible or desirable. For example embedded devices with space constraints or being able to restart USB ports from Bash-scripts. One use-case I have had for the driver is a script which monitors AT-modems by sending AT to the serial device, and restart the port by pipeing a value into portX if no reply has been received for a certain amount of time. -Kristian -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
Re: [PATCH] usb: misc: Driver for Yepkit YKUSH switchable hub
On Mon, Jan 19, 2015 at 08:32:26PM +0100, Kristian Evensen wrote: The Yepkit YKUSH https://www.yepkit.com/products/ykush is a three-port switchable USB hub. In addition the to actual hub device, an HID device is exported (VID 0x04D8 PID 0x0042). By sending specific commands to the HID device, it is possible to power up/down the three ports separately or all ports together. Commands 0x01-0x03 is used to power down ports 1-3, while 0x0A is used to power down all ports. In order to power up a port (or all ports), the command is OR'd with 0x10. That's great, and the hid parts of the patch makes sense, keeping the HID driver from binding to it, but for the rest, shouldn't that just be a simple userspace program instead? We don't like to add kernel drivers that can be done in userspace, and using usbfs/libusb should be really simple for this device from what the driver looks like. So, care to slim down the patch a bunch and resend? thanks, greg k-h -- To unsubscribe from this list: send the line unsubscribe linux-usb in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
