1 files changed, 88 insertions, 0 deletions
diff --git a/board/taniks/fans.c b/board/taniks/fans.c
new file mode 100644
index 0000000000..d50d3e5506
--- /dev/null
+++ b/board/taniks/fans.c
@@ -0,0 +1,88 @@
+/* Copyright 2021 The Chromium OS Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can be
+ * found in the LICENSE file.
+ */
+
+/* Physical fans. These are logically separate from pwm_channels. */
+
+#include "common.h"
+#include "compile_time_macros.h"
+#include "console.h"
+#include "fan_chip.h"
+#include "fan.h"
+#include "hooks.h"
+#include "pwm.h"
+
+/* MFT channels. These are logically separate from pwm_channels. */
+const struct mft_t mft_channels[] = {
+	[MFT_CH_0] = {
+		.module = NPCX_MFT_MODULE_1,
+		.clk_src = TCKC_LFCLK,
+		.pwm_id = PWM_CH_FAN,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(mft_channels) == MFT_CH_COUNT);
+
+static const struct fan_conf fan_conf_0 = {
+	.flags = FAN_USE_RPM_MODE,
+	.ch = MFT_CH_0,	/* Use MFT id to control fan */
+	.pgood_gpio = -1,
+	.enable_gpio = GPIO_EN_PP5000_FAN,
+};
+
+/*
+ * TODO(b/211076077): need to update for real fan
+ *
+ * Prototype fan spins at about 7200 RPM at 100% PWM.
+ * Set minimum at around 30% PWM.
+ */
+static const struct fan_rpm fan_rpm_0 = {
+	.rpm_min = 2200,
+	.rpm_start = 2200,
+	.rpm_max = 7200,
+};
+
+const struct fan_t fans[FAN_CH_COUNT] = {
+	[FAN_CH_0] = {
+		.conf = &fan_conf_0,
+		.rpm = &fan_rpm_0,
+	},
+};
+
+#ifndef CONFIG_FANS
+
+/*
+ * TODO(b/211076077): use static fan speeds until fan and sensors are
+ * tuned. for now, use:
+ *
+ *   AP off:  33%
+ *   AP  on: 100%
+ */
+
+static void fan_slow(void)
+{
+	const int duty_pct = 33;
+
+	ccprints("%s: speed %d%%", __func__, duty_pct);
+
+	pwm_enable(PWM_CH_FAN, 1);
+	pwm_set_duty(PWM_CH_FAN, duty_pct);
+}
+
+static void fan_max(void)
+{
+	const int duty_pct = 100;
+
+	ccprints("%s: speed %d%%", __func__, duty_pct);
+
+	pwm_enable(PWM_CH_FAN, 1);
+	pwm_set_duty(PWM_CH_FAN, duty_pct);
+}
+
+DECLARE_HOOK(HOOK_INIT, fan_slow, HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, fan_slow, HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_SHUTDOWN, fan_slow, HOOK_PRIO_DEFAULT);
+DECLARE_HOOK(HOOK_CHIPSET_RESET, fan_max, HOOK_PRIO_FIRST);
+DECLARE_HOOK(HOOK_CHIPSET_RESUME, fan_max, HOOK_PRIO_DEFAULT);
+
+#endif /* CONFIG_FANS */