Re: [PATCH v2] platform: int3472: discrete: Support multiple HIDs per GPIO map entry

[Hans de Goede <hansg@kernel.org>]

Hi,

On 18-Jul-26 22:38, Tarang Raval wrote:
> Each int3472_gpio_map entry currently maps exactly one ACPI HID to a
> GPIO quirk. As more sensors needing the same quirk are identified, this
> means adding a full duplicate table entry per HID, differing only in
> the HID string, which does not scale.
> 
> Change int3472_gpio_map::hid to a NULL-terminated hids array so a
> single entry can match any number of ACPI HIDs, letting new HIDs be
> added to the relevant array instead of duplicating quirk entries.
> 
> Suggested-by: Sakari Ailus <sakari.ailus@linux.intel.com>
> Signed-off-by: Tarang Raval <tarang.raval@siliconsignals.io>
> Tested-by: Kate Hsuan <hpa@redhat.com>

Thank you for your patch.

> ---
> change log:
> 
> v1 -> v2:
> 
> - Add per-HID comments to power_enable_hids_vana[] (Lenovo X9-14/X9-15
>   for SONY471A, Lenovo X1 Carbon G14 for TBE20A0)
> - Convert INT33F0 (mt9m114), INT347E (ov7251) entries to use named
>   power_enable_hids_*[] arrays instead of anonymous compound literals,
>   for style consistency
> - Did not convert OVTI08F4 (ov08x40) to a named array, and did not add
>   a NULL guard in int3472_gpio_map_hids_match(): not fully convinced
>   these changes are needed yet, but open to further discussion on both
> 
> Identified while reviewing Kate Hsuan's imx471 vana con_id patch, whose
> two near-identical SONY471A/TBE20A0 entries are collapsed here into
> one, backed by a new power_enable_hids_vana[] array.
> 
> This patch is on top of kate's imx471 driver series[1].
> 
> Link: https://lore.kernel.org/linux-media/20260629074026.35490-1-hpa@redhat.com/T/#t [1].
> ---
>  drivers/platform/x86/intel/int3472/discrete.c | 63 +++++++++++++------
>  1 file changed, 44 insertions(+), 19 deletions(-)
> 
> diff --git a/drivers/platform/x86/intel/int3472/discrete.c b/drivers/platform/x86/intel/int3472/discrete.c
> index adff564bf3fd..f70bd661592d 100644
> --- a/drivers/platform/x86/intel/int3472/discrete.c
> +++ b/drivers/platform/x86/intel/int3472/discrete.c
> @@ -123,10 +123,35 @@ skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
>  	return desc;
>  }
> 
> +/*
> + * Other vana-supply users (e.g. ST, Toshiba, Sony sensors) can be added to
> + * this array instead of adding new quirk table entries.
> + */
> +static const char * const power_enable_hids_vana[] = {
> +	/* Lenovo X9-14 and X9-15 */
> +	"SONY471A",
> +	/* Lenovo X1 Carbon G14 */
> +	"TBE20A0",
> +	NULL
> +};

Small nit, IMHO it would be cleaner to have the comments behind the
actual HID strings, e.g. :

static const char * const power_enable_hids_vana[] = {
	"SONY471A", /* Lenovo X9-14 and X9-15 */
	"TBE20A0",  /* Lenovo X1 Carbon G14 */
	NULL
};

and maybe also mention which sensor the HID is for, e.g.:

static const char * const power_enable_hids_vana[] = {
	"SONY471A", /* imx471 on Lenovo X9-14 and X9-15 */
	"TBE20A0",  /* imx471 on Lenovo X1 Carbon G14 */
	NULL
};

Otherwise this looks good to me:

Reviewed-by: Hans de Goede <johannes.goede@oss.qualcomm.com>

Regards,

Hans




> +
> +static const char * const power_enable_hids_vdd[] = {
> +	/* mt9m114 */
> +	"INT33F0",
> +	NULL
> +};
> +
> +static const char * const power_enable_hids_enable[] = {
> +	/* ov7251 */
> +	"INT347E",
> +	NULL
> +};
> +
>  /**
>   * struct int3472_gpio_map - Map GPIOs to whatever is expected by the
>   * sensor driver (as in DT bindings)
> - * @hid: The ACPI HID of the device without the instance number e.g. INT347E
> + * @hids: NULL-terminated array of ACPI HIDs of the devices without the
> + * instance number e.g. INT347E
>   * @type_from: The GPIO type from ACPI ?SDT
>   * @type_to: The assigned GPIO type, typically same as @type_from
>   * @enable_time_us: Enable time in usec for GPIOs mapped to regulators
> @@ -135,7 +160,7 @@ skl_int3472_gpiod_get_from_temp_lookup(struct int3472_discrete_device *int3472,
>   * GPIO_ACTIVE_HIGH otherwise
>   */
>  struct int3472_gpio_map {
> -	const char *hid;
> +	const char * const *hids;
>  	u8 type_from;
>  	u8 type_to;
>  	bool polarity_low;
> @@ -145,38 +170,27 @@ struct int3472_gpio_map {
> 
>  static const struct int3472_gpio_map int3472_gpio_map[] = {
>  	{	/* mt9m114 designs declare a powerdown pin which controls the regulators */
> -		.hid = "INT33F0",
> +		.hids = power_enable_hids_vdd,
>  		.type_from = INT3472_GPIO_TYPE_POWERDOWN,
>  		.type_to = INT3472_GPIO_TYPE_POWER_ENABLE,
>  		.con_id = "vdd",
>  		.enable_time_us = GPIO_REGULATOR_ENABLE_TIME,
>  	},
>  	{	/* ov7251 driver / DT-bindings expect "enable" as con_id for reset */
> -		.hid = "INT347E",
> +		.hids = power_enable_hids_enable,
>  		.type_from = INT3472_GPIO_TYPE_RESET,
>  		.type_to = INT3472_GPIO_TYPE_RESET,
>  		.con_id = "enable",
>  	},
>  	{	/* ov08x40's handshake pin needs a 45 ms delay on some HP laptops */
> -		.hid = "OVTI08F4",
> +		.hids = (const char * const[]) { "OVTI08F4", NULL },
>  		.type_from = INT3472_GPIO_TYPE_HANDSHAKE,
>  		.type_to = INT3472_GPIO_TYPE_HANDSHAKE,
>  		.con_id = "dvdd",
>  		.enable_time_us = 45 * USEC_PER_MSEC,
>  	},
> -	{	/* imx471 expects "vana" as con_id for power enable */
> -		.hid = "SONY471A",
> -		.type_from = INT3472_GPIO_TYPE_POWER_ENABLE,
> -		.type_to = INT3472_GPIO_TYPE_POWER_ENABLE,
> -		.con_id = "vana",
> -		.enable_time_us = GPIO_REGULATOR_ENABLE_TIME,
> -	},
> -	{
> -		/*
> -		 * imx471 (on Lenovo ThinkPads X1 G14) expects "vana" as con_id
> -		 * for power enable
> -		 */
> -		.hid = "TBE20A0",
> +	{	/* Sensors which expect "vana" as con_id for power enable */
> +		.hids = power_enable_hids_vana,
>  		.type_from = INT3472_GPIO_TYPE_POWER_ENABLE,
>  		.type_to = INT3472_GPIO_TYPE_POWER_ENABLE,
>  		.con_id = "vana",
> @@ -184,6 +198,17 @@ static const struct int3472_gpio_map int3472_gpio_map[] = {
>  	},
>  };
> 
> +static bool int3472_gpio_map_hids_match(struct acpi_device *adev,
> +					const char * const *hids)
> +{
> +	for (unsigned int i = 0; hids[i]; i++) {
> +		if (acpi_dev_hid_uid_match(adev, hids[i], NULL))
> +			return true;
> +	}
> +
> +	return false;
> +}
> +
>  static void int3472_get_con_id_and_polarity(struct int3472_discrete_device *int3472, u8 *type,
>  					    const char **con_id, unsigned long *gpio_flags,
>  					    unsigned int *enable_time_us)
> @@ -200,7 +225,7 @@ static void int3472_get_con_id_and_polarity(struct int3472_discrete_device *int3
>  		if (*type != int3472_gpio_map[i].type_from)
>  			continue;
> 
> -		if (!acpi_dev_hid_uid_match(adev, int3472_gpio_map[i].hid, NULL))
> +		if (!int3472_gpio_map_hids_match(adev, int3472_gpio_map[i].hids))
>  			continue;
> 
>  		dev_dbg(int3472->dev, "mapping type 0x%02x pin to 0x%02x %s\n",
> --
> 2.34.1
>