dojo: Control charging current with temperature charging table

Set a temperature charging table to control charging current to meet
thermal request.

BUG=b:219834480
BRANCH=cherry
TEST=make sure that charging current can be controlled by temperature
measured with thermistor according to the temperature charging table.

Signed-off-by: Tommy Chung <tommy.chung@quanta.corp-partner.google.com>
Change-Id: I6b31e5d9f06c60b1490d6ca6e5c74f970dac2173
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3468921
Reviewed-by: Devin Lu <Devin.Lu@quantatw.com>
Reviewed-by: Ting Shen <phoenixshen@chromium.org>

3 files changed, 86 insertions, 0 deletions

diff --git a/board/dojo/battery.c b/board/dojo/battery.c
index 7e9b30079b..12e6b6aba0 100644
--- a/board/dojo/battery.c
+++ b/board/dojo/battery.c
@@ -6,6 +6,10 @@
 #include "battery.h"
 #include "battery_fuel_gauge.h"
 #include "battery_smart.h"
+#include "charge_state.h"
+#include "console.h"
+#include "temp_sensor.h"
+#include "util.h"
 
 const struct board_batt_params board_battery_info[] = {
 	/* DynaPack CosMX Battery Information */
@@ -161,3 +165,44 @@ const struct board_batt_params board_battery_info[] = {
 BUILD_ASSERT(ARRAY_SIZE(board_battery_info) == BATTERY_TYPE_COUNT);
 
 const enum battery_type DEFAULT_BATTERY_TYPE = BATTERY_DYNAPACK_COS;
+
+int charger_profile_override(struct charge_state_data *curr)
+{
+	int chg_temp;
+	int prev_chg_lvl;
+	static int chg_lvl;
+
+	if (chipset_in_state(CHIPSET_STATE_ON)) {
+		temp_sensor_read(TEMP_SENSOR_CHARGER, &chg_temp);
+		chg_temp = K_TO_C(chg_temp);
+
+		prev_chg_lvl = chg_lvl;
+		if (chg_temp <= temp_chg_table[chg_lvl].lo_thre &&
+		    chg_lvl > 0)
+			chg_lvl--;
+		else if (chg_temp >= temp_chg_table[chg_lvl].hi_thre &&
+		         chg_lvl < CHG_LEVEL_COUNT - 1)
+			chg_lvl++;
+
+		curr->requested_current = MIN(curr->requested_current,
+		      temp_chg_table[chg_lvl].chg_curr);
+
+		if(chg_lvl != prev_chg_lvl)
+			ccprints("Override chg curr to %dmA by chg LEVEL_%d",
+			         curr->requested_current, chg_lvl);
+	}
+
+	return 0;
+}
+
+enum ec_status charger_profile_override_get_param(uint32_t param,
+						  uint32_t *value)
+{
+	return EC_RES_INVALID_PARAM;
+}
+
+enum ec_status charger_profile_override_set_param(uint32_t param,
+						  uint32_t value)
+{
+	return EC_RES_INVALID_PARAM;
+}
diff --git a/board/dojo/board.c b/board/dojo/board.c
index ae8e67b8f2..c3c57bd978 100644
--- a/board/dojo/board.c
+++ b/board/dojo/board.c
@@ -36,6 +36,26 @@ __override struct keyboard_scan_config keyscan_config = {
 	},
 };
 
+/* Temperature charging table */
+const struct temp_chg_struct temp_chg_table[] = {
+	[LEVEL_0] = {
+		.lo_thre = 0,
+		.hi_thre = 68,
+		.chg_curr = 3000,
+	},
+	[LEVEL_1] = {
+		.lo_thre = 63,
+		.hi_thre = 74,
+		.chg_curr = 1500,
+	},
+	[LEVEL_2] = {
+		.lo_thre = 69,
+		.hi_thre = 100,
+		.chg_curr = 500,
+	},
+};
+BUILD_ASSERT(ARRAY_SIZE(temp_chg_table) == CHG_LEVEL_COUNT);
+
 /* Sensor */
 static struct mutex g_base_mutex;
 static struct mutex g_lid_mutex;
diff --git a/board/dojo/board.h b/board/dojo/board.h
index ad1a251d92..6e00e3c009 100644
--- a/board/dojo/board.h
+++ b/board/dojo/board.h
@@ -31,6 +31,9 @@
 
 /* BC12 */
 
+/* Charger */
+#define CONFIG_CHARGER_PROFILE_OVERRIDE
+
 /* PD / USB-C / PPC */
 #undef CONFIG_USB_PD_DEBUG_LEVEL /* default to 1, configurable in ec console */
 
@@ -110,6 +113,24 @@ enum pwm_channel {
 	PWM_CH_COUNT,
 };
 
+/* Temperature charging level */
+enum temp_chg_lvl {
+	LEVEL_0 = 0,
+	LEVEL_1,
+	LEVEL_2,
+	CHG_LEVEL_COUNT,
+};
+
+/* Temperature charging struct */
+struct temp_chg_struct {
+	int lo_thre;
+	int hi_thre;
+	int chg_curr;
+};
+
+/* Forward declaration of temperature charging table */
+extern const struct temp_chg_struct temp_chg_table[];
+
 int board_accel_force_mode_mask(void);
 
 #endif /* !__ASSEMBLER__ */