CHERRY-PICK: nocturne: Enable CONFIG_CHARGER_PROFILE_OVERRIDE.

We need to stop charging the battery when the DRAM temperature exceeds
47 C.  This commit uses charge_profile_override() to start discharging
the pack when this happens and resume charging when the temperature
cools down.

BUG=b:115924459, b:112550414
BRANCH=firmware-nocturne-10984.B
TEST=Cool device down, verify that once temp sensor crosses threshold,
charging is stopped.
TEST=Verify charging is resumed when device shuts down.
TEST=Verify charging is resumed when device cools down.

Signed-off-by: Aseda Aboagye <aaboagye@google.com>
Signed-off-by: Puthikorn Voravootivat <puthik@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1231476
Reviewed-by: Aseda Aboagye <aaboagye@chromium.org>
Change-Id: I5feb132ec915894b7c391ffdf49a3f150912f554
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/2157061
Tested-by: Patryk Duda <pdk@semihalf.com>
Commit-Queue: Patryk Duda <pdk@semihalf.com>

2 files changed, 61 insertions, 0 deletions

diff --git a/board/nocturne/battery.c b/board/nocturne/battery.c
index 3db5fede33..67c5346063 100644
--- a/board/nocturne/battery.c
+++ b/board/nocturne/battery.c
@@ -8,17 +8,26 @@
 #include "battery.h"
 #include "battery_smart.h"
 #include "charge_manager.h"
+#include "charger.h"
 #include "chipset.h"
+#include "charge_state_v2.h"
 #include "common.h"
 #include "console.h"
 #include "ec_commands.h"
 #include "extpower.h"
 #include "hooks.h"
+#include "temp_sensor.h"
 #include "usb_pd.h"
 
 /* Shutdown mode parameter to write to manufacturer access register */
 #define SB_SHUTDOWN_DATA	0x0010
 
+/*
+ * We need to stop charging the battery when the DRAM temperature sensor gets
+ * over 47 C (320 K), and resume charging once it cools back down.
+ */
+#define DRAM_STOPCHARGE_TEMP_K	320
+
 /* Battery info */
 static const struct battery_info info = {
 	.voltage_max		= 8880,
@@ -115,3 +124,54 @@ static void reduce_input_voltage_when_full(void)
 	}
 }
 DECLARE_HOOK(HOOK_SECOND, reduce_input_voltage_when_full, HOOK_PRIO_DEFAULT);
+
+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;
+}
+
+static int should_stopcharge(void)
+{
+	int t_dram;
+
+	/* We can only stop charging on AC, if AC is plugged in. */
+	if (!gpio_get_level(GPIO_AC_PRESENT))
+		return 0;
+
+	/*
+	 * The DRAM temperature sensor is only available when the AP is on,
+	 * therefore only inhibit charging when we can actually read a
+	 * temperature.
+	 */
+	if (chipset_in_state(CHIPSET_STATE_ON) &&
+	    !temp_sensor_read(TEMP_SENSOR_DRAM, &t_dram) &&
+	    (t_dram >= DRAM_STOPCHARGE_TEMP_K))
+		return 1;
+	else
+		return 0;
+}
+
+int charger_profile_override(struct charge_state_data *curr)
+{
+	static uint8_t stopcharge_on_ac;
+	int enable_stopcharge;
+
+	enable_stopcharge = should_stopcharge();
+	if (enable_stopcharge != stopcharge_on_ac) {
+		stopcharge_on_ac = enable_stopcharge;
+		if (enable_stopcharge) {
+			chgstate_set_manual_current(0);
+		} else {
+			chgstate_set_manual_current(-1);
+		}
+	}
+
+	return 0;
+}
diff --git a/board/nocturne/board.h b/board/nocturne/board.h
index 82d511ed01..868dde09ad 100644
--- a/board/nocturne/board.h
+++ b/board/nocturne/board.h
@@ -71,6 +71,7 @@
 #define CONFIG_CHARGER_INPUT_CURRENT 128
 #define CONFIG_CHARGER_ISL9238
 #define CONFIG_CHARGER_MIN_BAT_PCT_FOR_POWER_ON 1
+#define CONFIG_CHARGER_PROFILE_OVERRIDE
 #define CONFIG_CHARGER_SENSE_RESISTOR 10
 #define CONFIG_CHARGER_SENSE_RESISTOR_AC 20
 #define CONFIG_EXTPOWER_GPIO