banshee: modify current limit setting

This modify is prevent the power lose when ac only power on the system.
Set the 0x4C bit5 to 1 when AC only then set to 0 when battery present.

When the charger input current over the InputCurrentLimit(0x3F) setting.
Charger IC will decrease the Vsys until Vsys is under battery voltage and
let the battery supplement the adapter(hybrid mode).
Therefore, AC only mode should disable the input current limit loop for
preventing Vsys drop too low and causing system shutdown.

BUG=b:222038282
BRANCH=none
TEST=1. AC only can power on the system to OS success.
2. AC+DC boot to OS then unplug the battery the system power not lose.
3. System can power on success from shipping mode.

Signed-off-by: Matt Wang <matt_wang@compal.corp-partner.google.com>
Change-Id: Ibadef0f523eaca532ec20cbff8a17ec14b6a4d19
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/platform/ec/+/3512113
Reviewed-by: Elthan Huang <elthan_huang@compal.corp-partner.google.com>
Reviewed-by: Boris Mittelberg <bmbm@google.com>

Author: Matt Wang

board/banshee/board.c

@@ -14,6 +14,7 @@
 #include "gpio_signal.h"
 #include "hooks.h"
 #include "driver/als_tcs3400.h"
+#include "driver/charger/isl9241.h"
 #include "fw_config.h"
 #include "hooks.h"
 #include "lid_switch.h"
@@ -41,3 +42,41 @@ static void board_chipset_suspend(void)
 {
 }
 DECLARE_HOOK(HOOK_CHIPSET_SUSPEND, board_chipset_suspend, HOOK_PRIO_DEFAULT);
+
+void board_set_charger_current_limit_deferred(void)
+{
+	int action;
+	int rv;
+
+	if (extpower_is_present() &&
+		(battery_get_disconnect_state() != BATTERY_NOT_DISCONNECTED))
+		/* AC only or AC+DC but battery is disconnect */
+		action = MASK_SET;
+	else
+		action = MASK_CLR;
+
+	rv = i2c_update16(chg_chips[CHARGER_SOLO].i2c_port,
+				chg_chips[CHARGER_SOLO].i2c_addr_flags,
+				ISL9241_REG_CONTROL3,
+				ISL9241_CONTROL3_INPUT_CURRENT_LIMIT, action);
+
+	if (rv)
+		CPRINTF("Could not set charger input current limit! Error: %d\n"
+		, rv);
+}
+
+DECLARE_DEFERRED(board_set_charger_current_limit_deferred);
+DECLARE_HOOK(HOOK_SECOND, board_set_charger_current_limit_deferred,
+	HOOK_PRIO_DEFAULT);
+
+void battery_present_interrupt(enum gpio_signal signal)
+{
+	hook_call_deferred(&board_set_charger_current_limit_deferred_data, 0);
+}
+
+void board_init(void)
+{
+	gpio_enable_interrupt(GPIO_EC_BATT_PRES_ODL);
+	hook_call_deferred(&board_set_charger_current_limit_deferred_data, 0);
+}
+DECLARE_HOOK(HOOK_INIT, board_init, HOOK_PRIO_DEFAULT);

board/banshee/board.h

@@ -235,6 +235,8 @@ enum mft_channel {
 	MFT_CH_COUNT
 };
 
+void battery_present_interrupt(enum gpio_signal signal);
+
 #endif /* !__ASSEMBLER__ */
 
 #endif /* __CROS_EC_BOARD_H */

board/banshee/gpio.inc

@@ -23,6 +23,7 @@ GPIO_INT(SEQ_EC_RSMRST_ODL,              PIN(E, 2), GPIO_INT_BOTH, power_signal_
 GPIO_INT(SLP_S3_L,                       PIN(A, 5), GPIO_INT_BOTH, power_signal_interrupt)
 GPIO_INT(SLP_SUS_L,                      PIN(F, 1), GPIO_INT_BOTH, power_signal_interrupt)
 GPIO_INT(SYS_SLP_S0IX_L,                 PIN(D, 5), GPIO_INT_BOTH, power_signal_interrupt)
+GPIO_INT(EC_BATT_PRES_ODL,               PIN(A, 3), GPIO_INT_BOTH, battery_present_interrupt)
 
 GPIO_INT(USB_C0_BC12_INT_ODL,            PIN(C, 6), GPIO_INT_FALLING, bc12_interrupt)
 GPIO_INT(USB_C1_BC12_INT_ODL,            PIN(5, 0), GPIO_INT_FALLING, bc12_interrupt)
@@ -43,7 +44,6 @@ GPIO_INT(USB_C3_RT_INT_ODL,              PIN(8, 1), GPIO_INT_FALLING, retimer_in
 GPIO(CCD_MODE_ODL,                   PIN(E, 5), GPIO_INPUT)
 GPIO(CHARGER_VAP_OTG_EN,             PIN(7, 3), GPIO_OUT_LOW)
 GPIO(CPU_C10_GATE_L,                 PIN(6, 7), GPIO_INPUT)
-GPIO(EC_BATT_PRES_ODL,               PIN(A, 3), GPIO_INPUT)
 GPIO(EC_ENTERING_RW,                 PIN(0, 3), GPIO_OUT_LOW)
 GPIO(EC_EN_EDP_BL,                   PIN(D, 3), GPIO_OUT_HIGH)
 GPIO(EC_GSC_PACKET_MODE,             PIN(7, 5), GPIO_OUT_LOW)