platform: mellanox: mlx-platform: Introduce ACPI init flow

Introduce support for ACPI initialization flow - add ACPI match hook.

Signed-off-by: Vadim Pasternak <vadimp@nvidia.com>
Reviewed-by: Michael Shych <michaelsh@nvidia.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ilpo Järvinen <ilpo.jarvinen@linux.intel.com>
Link: https://lore.kernel.org/r/20230822113451.13785-12-vadimp@nvidia.com
Signed-off-by: Hans de Goede <hdegoede@redhat.com>

Author: vadimp-nvidia

drivers/platform/x86/Kconfig

@@ -965,6 +965,7 @@ config SERIAL_MULTI_INSTANTIATE
 
 config MLX_PLATFORM
 	tristate "Mellanox Technologies platform support"
+	depends on ACPI
 	depends on I2C
 	select REGMAP
 	help

drivers/platform/x86/mlx-platform.c

@@ -6396,9 +6396,14 @@ static int mlxplat_probe(struct platform_device *pdev)
 {
 	unsigned int hotplug_resources_size = 0;
 	struct resource *hotplug_resources = NULL;
+	struct acpi_device *acpi_dev;
 	struct mlxplat_priv *priv;
 	int i, err;
 
+	acpi_dev = ACPI_COMPANION(&pdev->dev);
+	if (acpi_dev)
+		mlxplat_dev = pdev;
+
 	err = mlxplat_pre_init(&hotplug_resources, &hotplug_resources_size);
 	if (err)
 		return err;
@@ -6476,9 +6481,16 @@ static int mlxplat_remove(struct platform_device *pdev)
 	return 0;
 }
 
+static const struct acpi_device_id mlxplat_acpi_table[] = {
+	{ "MLNXBF49", 0 },
+	{}
+};
+MODULE_DEVICE_TABLE(acpi, mlxplat_acpi_table);
+
 static struct platform_driver mlxplat_driver = {
 	.driver		= {
 		.name	= "mlxplat",
+		.acpi_match_table = mlxplat_acpi_table,
 		.probe_type = PROBE_FORCE_SYNCHRONOUS,
 	},
 	.probe		= mlxplat_probe,