P9221: Add P9221 driver

This patch adds P9221 driver and enable it for Flapjack.

The driver originates from https://android.googlesource.com/kernel
/msm/+/android-msm-bluecross-4.9-pie-qpr1/drivers/power/supply/qcom
/p9221_charger.c

CQ-DEPEND=CL:1445133 CL:1551583
BRANCH=none
BUG=b:126162615

TEST=Verify charging from PD and WPC as follows:
1. Charge with PD charger. Place DUT on WPC charger.
-> PD charger continues to charge.
2. Unplug PD charger.
-> WPC starts charging as GPP.
3. Plug PD charger.
-> PD charger starts charging at 2A@9V

TEST=Verify OTG and WPC functionality as follows:
1. Plug fan to USB port:
-> Fan spins
2. Place DUT on WPC charger:
-> WPC starts charging as GPP. Fan continues to spin.
3. Remove DUT from WPC charger:
-> Fan continues to spin.
4. Do 1 and 2 then unplug USB fan:
-> WPC starts charging.

TEST=/sys/class/power_supply/CROS_USBPD_CHARGER0/usb_type is BrickID
/sys/class/power_supply/sbs-12-000b/status is ok

Change-Id: I5fbd0237cedd8095f98582c39973d432e733f2cd
Signed-off-by: Tony Zou <zoutao@huaqin.corp-partner.google.com>
Signed-off-by: Daisuke Nojiri <dnojiri@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/1448193
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>

1 files changed, 26 insertions, 9 deletions

diff --git a/board/flapjack/board.c b/board/flapjack/board.c
index f05616f853..dd0f1bebe3 100644
--- a/board/flapjack/board.c
+++ b/board/flapjack/board.c
@@ -46,6 +46,8 @@
 #include "usb_mux.h"
 #include "usb_pd_tcpm.h"
 #include "util.h"
+#include "driver/wpc/p9221.h"
+
 
 #define CPRINTS(format, args...) cprints(CC_USBCHARGE, format, ## args)
 #define CPRINTF(format, args...) cprintf(CC_USBCHARGE, format, ## args)
@@ -273,8 +275,13 @@ int board_set_active_charge_port(int charge_port)
 
 	switch (charge_port) {
 	case 0:
-		/* Don't charge from a source port */
+		/* Don't charge from a source port except wireless charging*/
+#ifdef CONFIG_WIRELESS_CHARGER_P9221_R7
+		if (board_vbus_source_enabled(charge_port)
+			&& !wpc_chip_is_online())
+#else
 		if (board_vbus_source_enabled(charge_port))
+#endif
 			return -1;
 		break;
 	case CHARGE_PORT_NONE:
@@ -302,14 +309,7 @@ void board_set_charge_limit(int port, int supplier, int charge_ma,
 
 int extpower_is_present(void)
 {
-	/*
-	 * The charger will indicate VBUS presence if we're sourcing 5V,
-	 * so exclude such ports.
-	 */
-	if (board_vbus_source_enabled(0))
-		return 0;
-	else
-		return tcpm_get_vbus_level(0);
+	return tcpm_get_vbus_level(0);
 }
 
 int pd_snk_is_vbus_provided(int port)
@@ -355,6 +355,10 @@ static void board_init(void)
 	gpio_enable_interrupt(GPIO_CHARGER_INT_ODL);
 
 #ifdef SECTION_IS_RW
+#ifdef CONFIG_WIRELESS_CHARGER_P9221_R7
+	/* Enable Wireless charger interrupts */
+	gpio_enable_interrupt(GPIO_P9221_INT_ODL);
+#endif
 	/* Enable interrupts from BMI160 sensor. */
 	gpio_enable_interrupt(GPIO_ACCEL_INT_ODL);
 
@@ -495,3 +499,16 @@ int board_allow_i2c_passthru(int port)
 void usb_charger_set_switches(int port, enum usb_switch setting)
 {
 }
+
+int board_get_fod(uint8_t **fod)
+{
+	*fod = NULL;
+	return 0;
+}
+
+int board_get_epp_fod(uint8_t **fod)
+{
+	*fod = NULL;
+	return 0;
+}
+