Re: [PATCH v10 30/36] pinctrl: airoha: an7583: add support for olt pinmux

[sashiko-bot@kernel.org]

Thank you for your contribution! Sashiko AI review found 1 potential issue(s) to consider:
- [High] The `olt` and `pon_alt` pin functions share the same physical pins but do not mutually clear each other's configuration bits, potentially causing hardware multiplexing conflicts.
--

--- Patch [30]: [PATCH v10 30/36] pinctrl: airoha: an7583: add support for olt pinmux ---
commit ce9b28cb0ea433c895d9e6cfad60de0854d4d8c3
Author: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>
Date:   Wed Aug 5 12:34:02 2026 +0000

pinctrl: airoha: an7583: add support for olt pinmux

Add support for olt pin function for olt pin group.

Signed-off-by: Mikhail Kshevetskiy <mikhail.kshevetskiy@iopsys.eu>

> diff --git a/drivers/pinctrl/airoha/pinctrl-an7583.c b/drivers/pinctrl/airoha/pinctrl-an7583.c
> index 2e145ef5a224c..031a8b36e0024 100644
> --- a/drivers/pinctrl/airoha/pinctrl-an7583.c
> +++ b/drivers/pinctrl/airoha/pinctrl-an7583.c

[ ... ]

> @@ -651,6 +655,19 @@ static const struct airoha_pinctrl_func_group pon_func_group[] = {
>  	},
>  };
>  
> +static const struct airoha_pinctrl_func_group olt_func_group[] = {
> +	{
> +		.name = "olt",
> +		.regmap[0] = {
> +			AIROHA_FUNC_MUX,
> +			REG_GPIO_PON_MODE,
> +			GPIO_OLT_MODE_MASK,

[Severity: High]
Will this mask configuration leave conflicting bits set if the pins were
previously configured for pon_alt mode?

Since the olt and pon_alt functions share the same physical pins (36
through 40), they appear to be mutually exclusive. When this mux
configuration is applied, it will set GPIO_OLT_MODE_MASK but won't clear
GPIO_PON_ALT_MODE_MASK or GPIO_PON_MODE_MASK if they were left set by the
bootloader or a previous runtime state.

Should the mask field include GPIO_PON_ALT_MODE_MASK and GPIO_PON_MODE_MASK
so they are properly cleared when olt is selected?

Additionally, does the existing pon_func_group need to be updated so that
selecting pon or pon_alt clears the newly added GPIO_OLT_MODE_MASK?

> +			GPIO_OLT_MODE_MASK
> +		},
> +		.regmap_size = 1,
> +	},
> +};
> +
>  static const struct airoha_pinctrl_func_group tod_1pps_func_group[] = {
>  	{
>  		.name = "pon_tod_1pps",

-- 
Sashiko AI review · https://sashiko.dev/#/patchset/20260805123408.3767648-1-mikhail.kshevetskiy@iopsys.eu?part=30