[PATCH v2 1/3] platform/chrome: update pwm fan control host commands

From: Sung-Chi Li via B4 Relay
Date: Fri May 02 2025 - 01:35:08 EST


From: Sung-Chi Li <lschyi@xxxxxxxxxxxx>

Update cros_ec_commands.h to include definitions for getting PWM fan
duty, getting and setting the fan control mode.

Signed-off-by: Sung-Chi Li <lschyi@xxxxxxxxxxxx>
---
include/linux/platform_data/cros_ec_commands.h | 29 +++++++++++++++++++++++++-
1 file changed, 28 insertions(+), 1 deletion(-)

diff --git a/include/linux/platform_data/cros_ec_commands.h b/include/linux/platform_data/cros_ec_commands.h
index 1f4e4f2b89bb936b4b1c3f4162fec203b196cbc8..2ac1a30f9a3195bfc9dffc72fe5c5b92d83f1ef2 100644
--- a/include/linux/platform_data/cros_ec_commands.h
+++ b/include/linux/platform_data/cros_ec_commands.h
@@ -1825,6 +1825,16 @@ struct ec_response_pwm_get_duty {
uint16_t duty; /* Duty cycle, EC_PWM_MAX_DUTY = 100% */
} __ec_align2;

+#define EC_CMD_PWM_GET_FAN_DUTY 0x0027
+
+struct ec_params_pwm_get_fan_duty {
+ uint8_t fan_idx;
+} __ec_align1;
+
+struct ec_response_pwm_get_fan_duty {
+ uint32_t percent; /* Percentage of duty cycle, ranging from 0 ~ 100 */
+} __ec_align4;
+
/*****************************************************************************/
/*
* Lightbar commands. This looks worse than it is. Since we only use one HOST
@@ -3105,14 +3115,31 @@ struct ec_params_thermal_set_threshold_v1 {

/****************************************************************************/

-/* Toggle automatic fan control */
+/* Set or get fan control mode */
#define EC_CMD_THERMAL_AUTO_FAN_CTRL 0x0052

+enum ec_auto_fan_ctrl_cmd {
+ EC_AUTO_FAN_CONTROL_CMD_SET = 0,
+ EC_AUTO_FAN_CONTROL_CMD_GET,
+};
+
/* Version 1 of input params */
struct ec_params_auto_fan_ctrl_v1 {
uint8_t fan_idx;
} __ec_align1;

+/* Version 2 of input params */
+struct ec_params_auto_fan_ctrl_v2 {
+ uint8_t fan_idx;
+ uint8_t cmd; /* enum ec_auto_fan_ctrl_cmd */
+ uint8_t set_auto; /* only used with EC_AUTO_FAN_CONTROL_CMD_SET - bool
+ */
+} __ec_align4;
+
+struct ec_response_auto_fan_control {
+ uint8_t is_auto; /* bool */
+} __ec_align1;
+
/* Get/Set TMP006 calibration data */
#define EC_CMD_TMP006_GET_CALIBRATION 0x0053
#define EC_CMD_TMP006_SET_CALIBRATION 0x0054

--
2.49.0.906.g1f30a19c02-goog