Re: [PATCH] i2c: tegra: Set ACPI node as primary fwnode

Jon Hunter
2022-11-18T09:39:23Z

On 17/11/2022 10:04, Akhil R wrote:
> Set ACPI node as the primary fwnode of I2C adapter to allow
> enumeration of child devices from the ACPI table
>
> Signed-off-by: Zubair Waheed <zwaheed@nvidia.com>
> Signed-off-by: Akhil R <akhilrajeev@nvidia.com>
> ---
> drivers/i2c/busses/i2c-tegra.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/drivers/i2c/busses/i2c-tegra.c b/drivers/i2c/busses/i2c-tegra.c
> index 954022c04cc4..69c9ae161bbe 100644
> --- a/drivers/i2c/busses/i2c-tegra.c
> +++ b/drivers/i2c/busses/i2c-tegra.c
> @@ -1826,6 +1826,7 @@ static int tegra_i2c_probe(struct platform_device *pdev)
> i2c_dev->adapter.class = I2C_CLASS_DEPRECATED;
> i2c_dev->adapter.algo = &tegra_i2c_algo;
> i2c_dev->adapter.nr = pdev->id;
> + ACPI_COMPANION_SET(&i2c_dev->adapter.dev, ACPI_COMPANION(&pdev->dev));
>
> if (i2c_dev->hw->supports_bus_clear)
> i2c_dev->adapter.bus_recovery_info = &tegra_i2c_recovery_info;

Do we always want to set as the primary fwnode even when booting with
device-tree? I some other drivers do, but I also see some others ...

if (has_acpi_companion(dev))
ACPI_COMPANION_SET(&i2c_dev->adapter.dev,
ACPI_COMPANION(&pdev->dev));

It would be nice to know why it is OK to always do this even for
device-tree because it is not clear to me.

Jon

--
nvpublic