ich_descriptors: Guess Wildcat Lake from descriptor content

karthikr-google · Anastasia Klimchuk · commit 9cfb8fe3acb2 · 2026-04-29T05:46:16.000Z
Panther Lake and Wildcat Lake chipsets share the same CPU Soft Strap Offseti (CSSO). They have different ICH Strap Length (ISL) as per the SPI Programming Guide. When ISL is 0x78, guess the chipset as Wildcat Lake. Otherwise guess the chipset as Panther Lake by default as done earlier. BUG=None TEST= meson compile -C builddir; meson test -C builddir; Change-Id: I4f84ce2501a5526bf0b5118249efbc07e9d9a2ab Signed-off-by: Karthikeyan Ramasubramanian <kramasub@google.com> Reviewed-on: https://review.coreboot.org/c/flashrom/+/92411 Reviewed-by: Anastasia Klimchuk <aklm@chromium.org> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
diff --git a/ich_descriptors.c b/ich_descriptors.c
@@ -1094,8 +1094,14 @@ static enum ich_chipset guess_ich_chipset_from_content(const struct ich_desc_con
 				return CHIPSET_JASPER_LAKE;
 			else if (content->CSSO == 0x70)
 				return CHIPSET_METEOR_LAKE;
-			else if (content->CSSO == 0x60)
-				return CHIPSET_PANTHER_LAKE;
+			else if (content->CSSO == 0x60) {
+				switch (content->ISL) {
+				case 0x78:
+					return CHIPSET_WILDCAT_LAKE;
+				default:
+					return CHIPSET_PANTHER_LAKE;
+				}
+			}
 		}
 		msg_pwarn("Unknown flash descriptor, assuming 500 series compatibility.\n");
 		return CHIPSET_500_SERIES_TIGER_POINT;
