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Message-Id: <20240807-v6-10-topic-usb-serial-serdev-v1-0-ed2cc5da591f@pengutronix.de>
Date: Wed, 07 Aug 2024 16:08:47 +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, Marco Felsch <m.felsch@...gutronix.de>
Subject: [PATCH 0/3] USB-Serial serdev support
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 = <®>;
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>
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