linux-kernel - Re: [PATCH 0/3] USB-Serial serdev support

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Message-ID: <20241001072453.3xv5sqxaj4zjprnz@pengutronix.de>
Date: Tue, 1 Oct 2024 09:24:53 +0200
From: Marco Felsch <m.felsch@...gutronix.de>
To: Rob Herring <robh@...nel.org>,
	Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
	Jiri Slaby <jirislaby@...nel.org>, Johan Hovold <johan@...nel.org>
Cc: linux-serial@...r.kernel.org, linux-kernel@...r.kernel.org,
	linux-usb@...r.kernel.org
Subject: Re: [PATCH 0/3] USB-Serial serdev support

Hi,

gentle ping as this is series is two months old now.

Regards,
  Marco

On 24-08-07, Marco Felsch wrote:
> Hi,
> 
> this patchset is based on Johan's patches [1] but dropped the need of
> the special 'serial' of-node [2].
> 
> With the patches in place and the usb hierarchy described in properly we
> can use serdev on-top of usb-serial. The below example adds the support
> for the following hierarchy:
>  - host->usb-hub->ftdi-usb-uart->bt/wlan-module:
> 
> &usb_dwc3_1 {
> 	dr_mode = "host";
> 	status = "okay";
> 
> 	hub@1 {
> 		compatible = "usb424,2514";
> 		reg = <1>;
> 
> 		vdd-supply = <&reg>;
> 		reset-gpios = <&gpio4 5 GPIO_ACTIVE_LOW>;
> 
> 		#address-cells = <1>;
> 		#size-cells = <0>;
> 
> 		device@1 {
> 			compatible = "usb403,6010";
> 			reg = <1>;
> 
> 			#address-cells = <2>;
> 			#size-cells = <0>;
> 
> 			interface@0 {
> 				compatible = "usbif403,6010.config1.0";
> 				reg = <0 1>;
> 
> 				#address-cells = <1>;
> 				#size-cells = <0>;
> 
> 				bluetooth {
> 					compatible = "nxp,88w8987-bt";
> 					fw-init-baudrate = <3000000>;
> 				};
> 			};
> 		};
> 	};
> };
> 
> If no serdev node is found the usb-serial is exposed as usual and can be
> accessed via /dev/ttyUSBx.
> 
> Regards,
>   Marco
> 
> [1] https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git/log/?h=usb-serial-of
> [2] https://git.kernel.org/pub/scm/linux/kernel/git/johan/usb-serial.git/commit/?h=usb-serial-of&id=b19239022c92567a6a9ed40e8522e84972b0997f
> 
> Signed-off-by: Marco Felsch <m.felsch@...gutronix.de>
> ---
> Marco Felsch (3):
>       serdev: ttyport: make use of tty_kopen_exclusive
>       USB: serial: cosmetic cleanup <space><tab> mix
>       USB: serial: enable serdev support
> 
>  drivers/tty/serdev/serdev-ttyport.c |  9 ++++++---
>  drivers/usb/serial/bus.c            | 10 ++++++----
>  2 files changed, 12 insertions(+), 7 deletions(-)
> ---
> base-commit: 0c3836482481200ead7b416ca80c68a29cfdaabd
> change-id: 20240807-v6-10-topic-usb-serial-serdev-83a7f8f86432
> 
> Best regards,
> -- 
> Marco Felsch <m.felsch@...gutronix.de>
> 
>