Re: [PATCH 6/8] ACPI/platform: add AWDZ8399 to serial-multi-instantiate

On Fri, Jul 17, 2026 at 3:27 PM Marco Giunta <[email protected]> wrote:
>
> Register the AWINIC AW88399 ACPI hardware ID "AWDZ8399" with the
> serial-multi-instantiate driver and add it to the ACPI scan ignore
> list so that the two I2C amplifier instances on Lenovo Legion laptops
> are enumerated as separate I2C client devices rather than a single
> ACPI platform device.
>
> The SMI node creates two instances named "aw88399-hda" with
> IRQ_RESOURCE_AUTO, matching the pattern used by CS35L41.
>
> Tested-by: Nadim Kobeissi <[email protected]>
> Tested-by: Xia Yun'an <[email protected]>
> Tested-by: Munzir Taha <[email protected]>
> Co-developed-by: Yakov Till <[email protected]>
> Signed-off-by: Yakov Till <[email protected]>
> Signed-off-by: Marco Giunta <[email protected]>

The change in drivers/acpi/scan.c is fine with me, so

Acked-by: Rafael J. Wysocki (Intel) <[email protected]> # ACPI core

and please feel free to route this patch as you see fit.

Thanks!

> ---
>  drivers/acpi/scan.c                             |  1 +
>  drivers/platform/x86/serial-multi-instantiate.c | 10 ++++++++++
>  2 files changed, 11 insertions(+)
>
> diff --git a/drivers/acpi/scan.c b/drivers/acpi/scan.c
> index 9a7ac2eb9ce0..4f4552b1551b 100644
> --- a/drivers/acpi/scan.c
> +++ b/drivers/acpi/scan.c
> @@ -1752,6 +1752,7 @@ static bool acpi_device_enumeration_by_parent(struct acpi_device *device)
>          * by the drivers/platform/x86/serial-multi-instantiate.c driver, which
>          * knows which client device id to use for each resource.
>          */
> +               {"AWDZ8399", },
>                 {"BSG1160", },
>                 {"BSG2150", },
>                 {"CSC3551", },
> diff --git a/drivers/platform/x86/serial-multi-instantiate.c b/drivers/platform/x86/serial-multi-instantiate.c
> index 1a369334f9cb..3e89fcdd45f7 100644
> --- a/drivers/platform/x86/serial-multi-instantiate.c
> +++ b/drivers/platform/x86/serial-multi-instantiate.c
> @@ -307,6 +307,15 @@ static void smi_remove(struct platform_device *pdev)
>         smi_devs_unregister(smi);
>  }
>
> +static const struct smi_node aw88399_hda = {
> +       .instances = {
> +               { "aw88399-hda", IRQ_RESOURCE_AUTO, 0 },
> +               { "aw88399-hda", IRQ_RESOURCE_AUTO, 0 },
> +               {}
> +       },
> +       .bus_type = SMI_AUTO_DETECT,
> +};
> +
>  static const struct smi_node bsg1160_data = {
>         .instances = {
>                 { "bmc150_accel", IRQ_RESOURCE_GPIO, 0 },
> @@ -405,6 +414,7 @@ static const struct smi_node tas2781_hda = {
>   * drivers/acpi/scan.c: acpi_device_enumeration_by_parent().
>   */
>  static const struct acpi_device_id smi_acpi_ids[] = {
> +       { "AWDZ8399", (unsigned long)&aw88399_hda },
>         { "BSG1160", (unsigned long)&bsg1160_data },
>         { "BSG2150", (unsigned long)&bsg2150_data },
>         { "CSC3551", (unsigned long)&cs35l41_hda },
> --
> 2.55.0
>