1 files changed, 62 insertions, 0 deletions
diff --git a/zephyr/projects/skyrim/src/skyrim/fan.c b/zephyr/projects/skyrim/src/skyrim/fan.c
new file mode 100644
index 0000000000..0a368ee6f0
--- /dev/null
+++ b/zephyr/projects/skyrim/src/skyrim/fan.c
@@ -0,0 +1,62 @@
+/* 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/drivers/gpio.h>
+#include <zephyr/logging/log.h>
+
+#include "cros_board_info.h"
+#include "cros_cbi.h"
+#include "fan.h"
+#include "gpio/gpio.h"
+#include "hooks.h"
+
+LOG_MODULE_DECLARE(skyrim, CONFIG_SKYRIM_LOG_LEVEL);
+
+/*
+ * Skyrim fan support
+ */
+static void fan_init(void)
+{
+	int ret;
+	uint32_t val;
+	uint32_t board_version;
+	/*
+	 * Retrieve the fan config.
+	 */
+	ret = cros_cbi_get_fw_config(FW_FAN, &val);
+	if (ret != 0) {
+		LOG_ERR("Error retrieving CBI FW_CONFIG field %d", FW_FAN);
+		return;
+	}
+
+	ret = cbi_get_board_version(&board_version);
+	if (ret != EC_SUCCESS) {
+		LOG_ERR("Error retrieving CBI board version");
+		return;
+	}
+
+	if ((board_version >= 3) && (val != FW_FAN_PRESENT)) {
+		/* Disable the fan */
+		fan_set_count(0);
+	}
+}
+DECLARE_HOOK(HOOK_INIT, fan_init, HOOK_PRIO_POST_FIRST);
+
+/*
+ * Pcore OCP support
+ * Note: early boards should note enable this interrupt as they are not
+ * correctly configured for it.
+ */
+__override bool board_supports_pcore_ocp(void)
+{
+	uint32_t board_version;
+
+	if (cbi_get_board_version(&board_version) == EC_SUCCESS &&
+	    board_version > 3)
+		return true;
+
+	return false;
+}