vilboz: dynamic changing charge current

This patch base on charger thermistor sensor
temperature to dynamic changing charge current.

BUG=b:174720890
BRANCH=zork
TEST=verify the charge current can be changed when
charger thermistor sensor temperature rises and drop.

Signed-off-by: Samsp_Liu <Samsp_Liu@compal.corp-partner.google.com>
Change-Id: I0ba4c17fcfa6b5b468778865ded53ab494eebe7e
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2666554
Tested-by: SamSP Liu <samsp_liu@compal.corp-partner.google.com>
Reviewed-by: Elthan Huang <elthan_huang@compal.corp-partner.google.com>
Reviewed-by: Denis Brockus <dbrockus@chromium.org>
Reviewed-by: Edward Hill <ecgh@chromium.org>
Commit-Queue: Edward Hill <ecgh@chromium.org>

2 files changed, 83 insertions, 0 deletions

diff --git a/board/vilboz/battery.c b/board/vilboz/battery.c
index dccc02805b..05beee34bc 100644
--- a/board/vilboz/battery.c
+++ b/board/vilboz/battery.c
@@ -6,7 +6,11 @@
  */
 
 #include "battery_fuel_gauge.h"
+#include "battery_smart.h"
+#include "charge_state.h"
 #include "common.h"
+#include "temp_sensor.h"
+#include "thermal.h"
 #include "util.h"
 
 /*
@@ -375,3 +379,80 @@ 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_SMP;
+
+struct chg_curr_step {
+	int on;
+	int off;
+	int curr_ma;
+};
+
+static const struct chg_curr_step chg_curr_table[] = {
+	{.on = 0, .off = 35, .curr_ma = 2800},
+	{.on = 36, .off = 35, .curr_ma = 1500},
+	{.on = 39, .off = 38, .curr_ma = 1000},
+};
+
+/* All charge current tables must have the same number of levels */
+#define NUM_CHG_CURRENT_LEVELS ARRAY_SIZE(chg_curr_table)
+
+int charger_profile_override(struct charge_state_data *curr)
+{
+	int rv;
+	int chg_temp_c;
+	int current;
+	int thermal_sensor0;
+	static int current_level;
+	static int prev_tmp;
+
+	/*
+	 * Precharge must be executed when communication is failed on
+	 * dead battery.
+	 */
+	if (!(curr->batt.flags & BATT_FLAG_RESPONSIVE))
+		return 0;
+
+	current = curr->requested_current;
+
+	rv = temp_sensor_read(TEMP_SENSOR_CHARGER, &thermal_sensor0);
+	chg_temp_c = K_TO_C(thermal_sensor0);
+
+	if (rv != EC_SUCCESS)
+		return 0;
+
+	if (chipset_in_state(CHIPSET_STATE_ON)) {
+		if (chg_temp_c < prev_tmp) {
+			if (chg_temp_c <= chg_curr_table[current_level].off)
+				current_level = current_level - 1;
+		} else if (chg_temp_c > prev_tmp) {
+			if (chg_temp_c >= chg_curr_table[current_level + 1].on)
+				current_level = current_level + 1;
+		}
+	}
+
+	/*
+	 * Prevent level always minus 0 or over table steps.
+	 */
+	if (current_level < 0)
+		current_level = 0;
+	else if (current_level >= NUM_CHG_CURRENT_LEVELS)
+		current_level = NUM_CHG_CURRENT_LEVELS - 1;
+
+	prev_tmp = chg_temp_c;
+	current = chg_curr_table[current_level].curr_ma;
+
+	curr->requested_current = MIN(curr->requested_current, current);
+
+	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/vilboz/board.h b/board/vilboz/board.h
index 3babb9bbc7..33ecda9b30 100644
--- a/board/vilboz/board.h
+++ b/board/vilboz/board.h
@@ -19,6 +19,8 @@
 #define GPIO_USB1_ILIM_SEL GPIO_USB_A0_CHARGE_EN_L
 #define GPIO_USB2_ILIM_SEL GPIO_USB_A1_CHARGE_EN_DB_L
 
+#define CONFIG_CHARGER_PROFILE_OVERRIDE
+
 /* Power  LEDs */
 #define CONFIG_LED_POWER_LED