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SubjectRe: [PATCH v4 0/3] Add support for MaxLinear/Exar USB to serial converters
On Sun, Jun 07, 2020 at 09:38:06PM +0530, Manivannan Sadhasivam wrote:
> Hello,
>
> This series adds support for MaxLinear/Exar USB to serial converters.
> This driver only supports XR21V141X series but it can easily be extended
> to other series in future.
>
> This driver is inspired from the initial one submitted by Patong Yang:
>
> https://patchwork.kernel.org/patch/10543261/
>
> While the initial driver was a custom tty USB driver exposing whole
> new serial interface ttyXRUSBn, this version is completely based on USB
> serial core thus exposing the interfaces as ttyUSBn. This will avoid
> the overhead of exposing a new USB serial interface which the userspace
> tools are unaware of.
>
> This series has been tested with Hikey970 board hosting XR21V141X chip.
>

Gentle ping on this series!

Thanks,
Mani

> Thanks,
> Mani
>
> Changes in v4:
>
> * Multiple improvements based on Johan's review. Noticeable ones are:
> - Now the driver claims both control and data interfaces but only registers
> tty device for data interface.
> - GPIO pin status is now shared between the console and gpiolib
> implementations. This is done to avoid changing the lines spuriously.
> - A separate port_open flag is added to reject GPIO requests while the tty
> port is open.
> - Removed padding PID to gpio device.
> * Added Greg and Mauro's review and tested tags.
> * Included a patch from Mauro to avoid the CDC-ACM driver to claim this device
> when this driver is built.
>
> Changes in v3:
>
> * Dropped the check for PID and also the reg_width property.
>
> Changes in v2:
>
> * Dropped the code related to handling variable register size. It's all u8 now.
> * Dropped the header file and moved the contents to driver itself.
> * Added Linus's reviewed-by tag for gpiochip patch.
> * Added PID to gpiochip label
> * Dropped gpiochip for interface 0
>
> Manivannan Sadhasivam (2):
> usb: serial: Add MaxLinear/Exar USB to Serial driver
> usb: serial: xr_serial: Add gpiochip support
>
> Mauro Carvalho Chehab (1):
> usb: cdc-acm: Ignore Exar XR21V141X when serial driver is built
>
> drivers/usb/class/cdc-acm.c | 6 +
> drivers/usb/serial/Kconfig | 9 +
> drivers/usb/serial/Makefile | 1 +
> drivers/usb/serial/xr_serial.c | 857 +++++++++++++++++++++++++++++++++
> 4 files changed, 873 insertions(+)
> create mode 100644 drivers/usb/serial/xr_serial.c
>
> --
> 2.17.1
>

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