1 files changed, 145 insertions, 0 deletions
diff --git a/board/dewatt/thermal.c b/board/dewatt/thermal.c
new file mode 100644
index 0000000000..39be5bfd6b
--- /dev/null
+++ b/board/dewatt/thermal.c
@@ -0,0 +1,145 @@
+/* Copyright 2022 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.
+ */
+
+/* Guybrush board-specific configuration */
+
+#include "console.h"
+#include "fan.h"
+#include "thermal.h"
+#include "util.h"
+
+/* Console output macros */
+#define CPUTS(outstr) cputs(CC_THERMAL, outstr)
+#define CPRINTS(format, args...) cprints(CC_THERMAL, format, ## args)
+
+const struct fan_conf fan_conf_0 = {
+	.flags = FAN_USE_RPM_MODE,
+	.ch = MFT_CH_0, /* Use MFT id to control fan */
+	.pgood_gpio = GPIO_S0_PGOOD,
+	.enable_gpio = -1,
+};
+const struct fan_rpm fan_rpm_0 = {
+	.rpm_min = 3000,
+	.rpm_start = 3000,
+	.rpm_max = 6000,
+};
+const struct fan_t fans[] = {
+	[FAN_CH_0] = {
+		.conf = &fan_conf_0,
+		.rpm = &fan_rpm_0,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(fans) == FAN_CH_COUNT);
+
+struct ec_thermal_config thermal_params[TEMP_SENSOR_COUNT] = {
+	[TEMP_SENSOR_SOC] = {
+		.temp_host = {
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(80),
+			[EC_TEMP_THRESH_HALT] = C_TO_K(85),
+		},
+		.temp_host_release = {
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(75),
+		},
+		.temp_fan_off = C_TO_K(27),
+		.temp_fan_max = C_TO_K(80),
+	},
+	[TEMP_SENSOR_CHARGER] = {
+		.temp_host = {
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(80),
+			[EC_TEMP_THRESH_HALT] = C_TO_K(85),
+		},
+		.temp_host_release = {
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(75),
+		},
+		.temp_fan_off = 0,
+		.temp_fan_max = 0,
+	},
+	[TEMP_SENSOR_MEMORY] = {
+		.temp_host = {
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(80),
+			[EC_TEMP_THRESH_HALT] = C_TO_K(85),
+		},
+		.temp_host_release = {
+			[EC_TEMP_THRESH_HIGH] = C_TO_K(75),
+		},
+		.temp_fan_off = 0,
+		.temp_fan_max = 0,
+	},
+	[TEMP_SENSOR_CPU] = {
+		.temp_host = {
+			[EC_TEMP_THRESH_HIGH] = 0,
+			[EC_TEMP_THRESH_HALT] = 0,
+		},
+		.temp_host_release = {
+			[EC_TEMP_THRESH_HIGH] = 0,
+		},
+		.temp_fan_off = 0,
+		.temp_fan_max = 0,
+	},
+	/*
+	 * Note: Leave ambient entries at 0, both as it does not represent a
+	 * hotspot and as not all boards have this sensor
+	 */
+};
+BUILD_ASSERT(ARRAY_SIZE(thermal_params) == TEMP_SENSOR_COUNT);
+
+struct fan_step {
+	int on;
+	int off;
+	int rpm;
+};
+
+static const struct fan_step fan_table[] = {
+	{.on =  0, .off =  1, .rpm = 0},
+	{.on =  6, .off =  2, .rpm = 3000},
+	{.on = 28, .off = 15, .rpm = 3300},
+	{.on = 34, .off = 26, .rpm = 3700},
+	{.on = 39, .off = 32, .rpm = 4000},
+	{.on = 45, .off = 38, .rpm = 4300},
+	{.on = 51, .off = 43, .rpm = 4700},
+	{.on = 74, .off = 62, .rpm = 5400},
+};
+#define NUM_FAN_LEVELS ARRAY_SIZE(fan_table)
+
+int fan_percent_to_rpm(int fan, int pct)
+{
+	static int current_level;
+	static int previous_pct;
+	int i;
+
+	/*
+	 * Compare the pct and previous pct, we have the three paths :
+	 *  1. decreasing path. (check the off point)
+	 *  2. increasing path. (check the on point)
+	 *  3. invariant path. (return the current RPM)
+	 */
+	if (pct < previous_pct) {
+		for (i = current_level; i >= 0; i--) {
+			if (pct <= fan_table[i].off)
+				current_level = i - 1;
+			else
+				break;
+		}
+	} else if (pct > previous_pct) {
+		for (i = current_level + 1; i < NUM_FAN_LEVELS; i++) {
+			if (pct >= fan_table[i].on)
+				current_level = i;
+			else
+				break;
+		}
+	}
+
+	if (current_level < 0)
+		current_level = 0;
+
+	previous_pct = pct;
+
+	if (fan_table[current_level].rpm !=
+		fan_get_rpm_target(FAN_CH(fan)))
+		CPRINTS("Setting fan RPM to %d",
+			fan_table[current_level].rpm);
+
+	return fan_table[current_level].rpm;
+}