[M] Change in coreboot[master]: drivers/wifi/generic: Fix properties in generic-under-PCI device case

[Kapil Porwal (Code Review)]

Kapil Porwal has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/70262 )

Change subject: drivers/wifi/generic: Fix properties in generic-under-PCI device case
......................................................................

drivers/wifi/generic: Fix properties in generic-under-PCI device case

In the devicetree case where a generic device underneath the Intel PCI
CNVi device carries the device properties, the incorrect device was
passed to wifi_ssdt_write_properties.

BUG=b:259716145
TEST=Dump SSDT and see that _PRW and _DSD for CNVi device contains
the value from the devicetree on google/kuldax.

SSDT when generic-under-PCI:
    Scope (_SB.PCI0.WFA3)
    {
        Name (_PRW, Package (0x02)  // _PRW: Power Resources for Wake
        {
            0x6D,
            0x03
        })
        Name (_DSD, Package (0x02)  // _DSD: Device-Specific Data
        {
            ToUUID ("70d24161-6dd5-4c9e-8070-705531292865"),
            Package (0x01)
            {
                Package (0x02)
                {
                    "DmaProperty",
                    One
                }
            }
        })
        Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
        {
            ToBuffer (Arg0, Local0)
            Return (Buffer (One)
            {
                 0x00                                             // .
            })
        }
    }

SSDT when CNVi:
    Scope (_SB.PCI0.CNVW)
    {
        Name (_PRW, Package (0x02)  // _PRW: Power Resources for Wake
        {
            0x6D,
            0x03
        })
        Name (_DSD, Package (0x02)  // _DSD: Device-Specific Data
        {
            ToUUID ("70d24161-6dd5-4c9e-8070-705531292865"),
            Package (0x01)
            {
                Package (0x02)
                {
                    "DmaProperty",
                    One
                }
            }
        })
        Method (_DSM, 4, Serialized)  // _DSM: Device-Specific Method
        {
            ToBuffer (Arg0, Local0)
            Return (Buffer (One)
            {
                 0x00                                             // .
            })
        }
    }

Signed-off-by: Kapil Porwal 
Change-Id: I6f7d0b826ce067b40fa89d74f421d7018ecc3fbb
---
M src/drivers/wifi/generic/acpi.c
1 file changed, 84 insertions(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/62/70262/1

diff --git a/src/drivers/wifi/generic/acpi.c b/src/drivers/wifi/generic/acpi.c
index 3996739..6555c11 100644
--- a/src/drivers/wifi/generic/acpi.c
+++ b/src/drivers/wifi/generic/acpi.c
@@ -585,13 +585,18 @@
 void wifi_pcie_fill_ssdt(const struct device *dev)
 {
    const char *path;
+	const struct device *child;

path = acpi_device_path(dev);
    if (!path)
    	return;

wifi_ssdt_write_device(dev, path);
-	wifi_ssdt_write_properties(dev, path);
+	child = dev->link_list ? dev->link_list->children : NULL;
+	if (child && child->path.type == DEVICE_PATH_GENERIC)
+		wifi_ssdt_write_properties(child, path);
+	else
+		wifi_ssdt_write_properties(dev, path);
 }

const char *wifi_pcie_acpi_name(const struct device *dev)