1 files changed, 34 insertions, 0 deletions
diff --git a/zephyr/projects/skyrim/src/winterhold/kb_backlight.c b/zephyr/projects/skyrim/src/winterhold/kb_backlight.c
new file mode 100644
index 0000000000..049b99e3a1
--- /dev/null
+++ b/zephyr/projects/skyrim/src/winterhold/kb_backlight.c
@@ -0,0 +1,34 @@
+/* Copyright 2022 The ChromiumOS Authors
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+#include <zephyr/devicetree.h>
+#include <zephyr/logging/log.h>
+
+#include "board_config.h"
+#include "common.h"
+#include "cros_board_info.h"
+#include "cros_cbi.h"
+
+LOG_MODULE_DECLARE(skyrim, CONFIG_SKYRIM_LOG_LEVEL);
+
+__override uint32_t board_override_feature_flags0(uint32_t flags0)
+{
+	int ret;
+	uint32_t val;
+
+	/*
+	 * Remove keyboard backlight feature for devices that don't support it.
+	 */
+	ret = cros_cbi_get_fw_config(FW_KB_BL, &val);
+	if (ret != 0) {
+		LOG_ERR("Error retrieving CBI FW_CONFIG field %d", FW_KB_BL);
+		return flags0;
+	}
+
+	if (val == FW_KB_BL_NOT_PRESENT)
+		return (flags0 & ~EC_FEATURE_MASK_0(EC_FEATURE_PWM_KEYB));
+	else
+		return flags0;
+}