1 files changed, 36 insertions, 0 deletions
diff --git a/zephyr/projects/nissa/yaviks/src/fan.c b/zephyr/projects/nissa/yaviks/src/fan.c
new file mode 100644
index 0000000000..23c3ec1143
--- /dev/null
+++ b/zephyr/projects/nissa/yaviks/src/fan.c
@@ -0,0 +1,36 @@
+/* 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_cbi.h"
+#include "fan.h"
+#include "gpio/gpio.h"
+#include "hooks.h"
+#include "nissa_common.h"
+LOG_MODULE_DECLARE(nissa, CONFIG_NISSA_LOG_LEVEL);
+
+static void fan_init(void)
+{
+	int ret;
+	uint32_t val;
+	/*
+	 * 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;
+	}
+	if (val != FW_FAN_PRESENT) {
+		/* Disable the fan */
+		fan_set_count(0);
+	} else {
+		/* Configure the fan enable GPIO */
+		gpio_pin_configure_dt(GPIO_DT_FROM_NODELABEL(gpio_fan_enable),
+				      GPIO_OUTPUT);
+	}
+}
+DECLARE_HOOK(HOOK_INIT, fan_init, HOOK_PRIO_POST_FIRST);