linux-kernel - Re: [PATCH 2/3] pinctrl: ls2k0300: Support Loongson 2K0300 SoC

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [<thread-prev] [day] [month] [year] [list]

Message-ID: <aJ1U4RdkyCy4bxyd@pie>
Date: Thu, 14 Aug 2025 03:15:45 +0000
From: Yao Zi <ziyao@...root.org>
To: Linus Walleij <linus.walleij@...aro.org>, Rob Herring <robh@...nel.org>,
	Krzysztof Kozlowski <krzk+dt@...nel.org>,
	Conor Dooley <conor+dt@...nel.org>,
	Huacai Chen <chenhuacai@...nel.org>,
	WANG Xuerui <kernel@...0n.name>
Cc: linux-gpio@...r.kernel.org, devicetree@...r.kernel.org,
	linux-kernel@...r.kernel.org, loongarch@...ts.linux.dev,
	Mingcong Bai <jeffbai@...c.io>, Kexy Biscuit <kexybiscuit@...c.io>
Subject: Re: [PATCH 2/3] pinctrl: ls2k0300: Support Loongson 2K0300 SoC

On Mon, Aug 11, 2025 at 04:37:49PM +0000, Yao Zi wrote:
> Support pin multiplexing and drive-strength setting for Loongson 2K0300
> SoC. Pin multiplexing could be done separately for each pin, while
> drive-strength could be only configured on function basis. This differs
> a lot from the driver for previous generation of Loongson SoC, where
> pinmux setting is based on group.
> 
> Pins are represented with pinmux properties in devicetrees, and we use
> the generic pinmux API for parsing. The common pinconf interface isn't
> used for drive-strength setting, since it handles pinconf settings at a
> unit of pin groups or smaller.
> 
> Instead, the driver configures drive-strength settings just after
> parsing the devicetree. The devicetree's structure ensures no conflicts
> could happen in drive-strength settings.
> 
> Signed-off-by: Yao Zi <ziyao@...root.org>
> ---
>  MAINTAINERS                        |   1 +
>  drivers/pinctrl/Kconfig            |  14 +
>  drivers/pinctrl/Makefile           |   1 +
>  drivers/pinctrl/pinctrl-ls2k0300.c | 515 +++++++++++++++++++++++++++++
>  4 files changed, 531 insertions(+)
>  create mode 100644 drivers/pinctrl/pinctrl-ls2k0300.c

...

> diff --git a/drivers/pinctrl/pinctrl-ls2k0300.c b/drivers/pinctrl/pinctrl-ls2k0300.c
> new file mode 100644
> index 000000000000..11d448ba333d
> --- /dev/null
> +++ b/drivers/pinctrl/pinctrl-ls2k0300.c

...

> +static const struct pinmux_ops ls2k0300_pmux_ops = {
> +	.get_functions_count	= ls2k0300_pinmux_get_functions_count,
> +	.get_function_name	= ls2k0300_pinmux_get_function_name,
> +	.get_function_groups	= ls2k0300_pinmux_get_function_groups,
> +	.set_mux		= ls2k0300_pinmux_set_mux,
> +};

I forgot to enable strict mode for the pinmux operations. Will correct
this in v2. I'll wait a few days for more comments before sending it,
thanks for your time.

Best regards,
Yao Zi