linux-kernel - Re: [RFC PATCH 0/4] ESWIN EIC7700 pinctrl driver

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Message-ID: <4a45df45-b2b1-4da9-b829-c5310cf32b5f@sifive.com>
Date: Tue, 25 Mar 2025 16:19:40 -0500
From: Samuel Holland <samuel.holland@...ive.com>
To: Emil Renner Berthing <emil.renner.berthing@...onical.com>,
 Pinkesh Vaghela <pinkesh.vaghela@...fochips.com>,
 Pritesh Patel <pritesh.patel@...fochips.com>,
 Min Lin <linmin@...incomputing.com>
Cc: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
 Krzysztof Kozlowski <krzk+dt@...nel.org>, Conor Dooley
 <conor+dt@...nel.org>, Paul Walmsley <paul.walmsley@...ive.com>,
 Palmer Dabbelt <palmer@...belt.com>, Alexandre Ghiti <alex@...ti.fr>,
 Bartosz Golaszewski <brgl@...ev.pl>, linux-gpio@...r.kernel.org,
 devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
 linux-riscv@...ts.infradead.org, 鲁玉林
 <luyulin@...incomputing.com>, 宁宇
 <ningyu@...incomputing.com>, Lin Feng <fenglin@...incomputing.com>
Subject: Re: [RFC PATCH 0/4] ESWIN EIC7700 pinctrl driver

Hi Emil,

On 2025-03-25 9:13 AM, Emil Renner Berthing wrote:
> Hi Pinkesh et. al
> 
> It's great to see you've begun upstreaming support for the EIC7700. I
> read some of the data sheet for the SoC and noticed the pinctrl is quite
> simple and could benefit from using the same model as the TH1520 pinctrl
> driver. This version should do the same as the vendor driver, but in
> less than 2/3 the code.
> 
> I hope you'll consider switching to this version once the basic
> support[1] lands. This patchset also depends on that series.

Thanks for your efforts here. We are working with ESWIN (CCed) to simplify and
prepare their driver for upstreaming, and we have ended up with something
similar to what you include here. We were hoping to send out a first version of
the driver soon. There are still some differences between the two drivers, so
ideally we can coordinate on which series to move forward with.

Regards,
Samuel

> [1]: https://lore.kernel.org/all/20250320105449.2094192-1-pinkesh.vaghela@einfochips.com/
> 
> Emil Renner Berthing (4):
>   dt-bindings: pinctrl: Add eswin,eic7700-pinctrl binding
>   pinctrl: Add driver for the ESWIN EIC7700 RISC-V SoC
>   riscv: dts: Add EIC7700 pin controller node
>   riscv: dts: eswin: Add HiFive Premier UART pin control
> 
>  .../pinctrl/eswin,eic7700-pinctrl.yaml        | 141 +++
>  .../dts/eswin/eic7700-hifive-premier-p550.dts |  46 +
>  arch/riscv/boot/dts/eswin/eic7700.dtsi        |  17 +
>  drivers/pinctrl/Kconfig                       |  14 +
>  drivers/pinctrl/Makefile                      |   1 +
>  drivers/pinctrl/pinctrl-eic7700.c             | 802 ++++++++++++++++++
>  6 files changed, 1021 insertions(+)
>  create mode 100644 Documentation/devicetree/bindings/pinctrl/eswin,eic7700-pinctrl.yaml
>  create mode 100644 drivers/pinctrl/pinctrl-eic7700.c
> 
> 
> base-commit: 38fec10eb60d687e30c8c6b5420d86e8149f7557
> prerequisite-patch-id: 2e5cc67f66a8cfe463ec73b98cd17130d4094a86
> prerequisite-patch-id: e39d6867f89c605fd1e3621937c8c91a6cfbe7c8
> prerequisite-patch-id: 5d2232bb3ce3d7d4e23477c2ad3db30424fee33c
> prerequisite-patch-id: 946719f43a0cc23ffe82e996e076de2221dcd8db
> prerequisite-patch-id: c2c2bc1b676b1e15165e107515b380318e9ca941
> prerequisite-patch-id: aa4a955dd99d0796973fedb78bea269ebab73b6b
> prerequisite-patch-id: 1cd27ddae721cc1e6c52723f8b360b09b5e712c7
> prerequisite-patch-id: 237813218e54e0c7cbed8d72e30eb649ffd9ecd4
> prerequisite-patch-id: 8e687755e898e71c80b0294b90deac71fe05c421
> prerequisite-patch-id: 05622d10a27ba9cba36b3d194e51a2d8d7b7b783