mb/amd/birman: Add framework for morgana crb birman

birman is the reference board for the morgana SoC.  It needs to be
updated to match the actual board design as well.

Signed-off-by: Martin Roth <martin.roth@amd.corp-partner.google.com>
Change-Id: I4b16854c954949217a76c3d4f04ddc4001f64337
Reviewed-on: https://review.coreboot.org/c/coreboot/+/68196
Reviewed-by: Fred Reitberger <reitbergerfred@gmail.com>
Reviewed-by: Marshall Dawson <marshalldawson3rd@gmail.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>

1 files changed, 21 insertions, 0 deletions

diff --git a/src/mainboard/amd/birman/chromeos.c b/src/mainboard/amd/birman/chromeos.c
new file mode 100644
index 0000000000..515da94df1
--- /dev/null
+++ b/src/mainboard/amd/birman/chromeos.c
@@ -0,0 +1,21 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+
+#include <bootmode.h>
+#include <boot/coreboot_tables.h>
+#include <gpio.h>
+#include <types.h>
+#include <vendorcode/google/chromeos/chromeos.h>
+
+void fill_lb_gpios(struct lb_gpios *gpios)
+{
+	struct lb_gpio chromeos_gpios[] = {};
+	lb_add_gpios(gpios, chromeos_gpios, ARRAY_SIZE(chromeos_gpios));
+}
+
+int get_write_protect_state(void)
+{
+	/* Birman doesn't have a write protect pin */
+	return 0;
+}
+
+DECLARE_NO_CROS_GPIOS();