RE: [PATCH v12 3/5] gpio: rpmsg: add generic rpmsg GPIO driver

[Shenwei Wang]

Hi Bjorn,

> -----Original Message-----
> From: Shenwei Wang
> Sent: Friday, March 13, 2026 2:59 PM
> To: Linus Walleij <linusw@xxxxxxxxxx>; Bartosz Golaszewski <brgl@xxxxxxxxxx>;
> Jonathan Corbet <corbet@xxxxxxx>; Rob Herring <robh@xxxxxxxxxx>; Krzysztof
> Kozlowski <krzk+dt@xxxxxxxxxx>; Conor Dooley <conor+dt@xxxxxxxxxx>; Bjorn
> Andersson <andersson@xxxxxxxxxx>; Mathieu Poirier
> <mathieu.poirier@xxxxxxxxxx>; Frank Li <frank.li@xxxxxxx>; Sascha Hauer
> <s.hauer@xxxxxxxxxxxxxx>; arnaud.pouliquen@xxxxxxxxxxx
> Cc: Shuah Khan <skhan@xxxxxxxxxxxxxxxxxxx>; linux-gpio@xxxxxxxxxxxxxxx; linux-
> doc@xxxxxxxxxxxxxxx; linux-kernel@xxxxxxxxxxxxxxx; Pengutronix Kernel Team
> <kernel@xxxxxxxxxxxxxx>; Fabio Estevam <festevam@xxxxxxxxx>; Shenwei
> Wang <shenwei.wang@xxxxxxx>; Peng Fan <peng.fan@xxxxxxx>;
> devicetree@xxxxxxxxxxxxxxx; linux-remoteproc@xxxxxxxxxxxxxxx;
> imx@xxxxxxxxxxxxxxx; linux-arm-kernel@xxxxxxxxxxxxxxxxxxx; dl-linux-imx <linux-
> imx@xxxxxxx>; Bartosz Golaszewski <brgl@xxxxxxxx>; Andrew Lunn
> <andrew@xxxxxxx>
> Subject: [PATCH v12 3/5] gpio: rpmsg: add generic rpmsg GPIO driver
> 

Since I rewrote this version based on your earlier feedback 
---
"My expectation is that it will be better to just have two separate
drivers - but reuse all the design-work done in the gpio-virtio."
---
I'd glad to hear what you think about this patch.

Thanks,
Shenwei

> On an AMP platform, the system may include two processors:
> 	- An MCU running an RTOS
> 	- An MPU running Linux
> 
> These processors communicate via the RPMSG protocol.
> The driver implements the standard GPIO interface, allowing the Linux side to
> control GPIO controllers which reside in the remote processor via RPMSG
> protocol.
> 
> Cc: Bartosz Golaszewski <brgl@xxxxxxxx>
> Cc: Andrew Lunn <andrew@xxxxxxx>
> Signed-off-by: Shenwei Wang <shenwei.wang@xxxxxxx>
> ---
>  drivers/gpio/Kconfig      |  17 ++
>  drivers/gpio/Makefile     |   1 +
>  drivers/gpio/gpio-rpmsg.c | 596 ++++++++++++++++++++++++++++++++++++++
>  3 files changed, 614 insertions(+)
>  create mode 100644 drivers/gpio/gpio-rpmsg.c
> 
> diff --git a/drivers/gpio/Kconfig b/drivers/gpio/Kconfig index
> b45fb799e36c..cff0fda8a283 100644