[PATCH 12/12] staging: typec: tcpci: move tcpci driver out of staging

[Li Jun <jun.li-3arQi8VN3Tc@public.gmane.org>]

Move TCPCI(Typec port controller interface) driver out of staging.

Signed-off-by: Li Jun <jun.li-3arQi8VN3Tc@public.gmane.org>
---
 drivers/staging/Kconfig        |   2 -
 drivers/staging/Makefile       |   1 -
 drivers/staging/typec/Kconfig  |  14 -
 drivers/staging/typec/Makefile |   1 -
 drivers/staging/typec/TODO     |   5 -
 drivers/staging/typec/tcpci.c  | 637 -----------------------------------------
 drivers/staging/typec/tcpci.h  | 133 ---------
 drivers/usb/typec/Kconfig      |   7 +
 drivers/usb/typec/Makefile     |   1 +
 drivers/usb/typec/tcpci.c      | 637 +++++++++++++++++++++++++++++++++++++++++
 drivers/usb/typec/tcpci.h      | 133 +++++++++
 11 files changed, 778 insertions(+), 793 deletions(-)

diff --git a/drivers/staging/Kconfig b/drivers/staging/Kconfig
index 5546839..1e3d5d0 100644
--- a/drivers/staging/Kconfig
+++ b/drivers/staging/Kconfig
@@ -112,8 +112,6 @@ source "drivers/staging/vc04_services/Kconfig"
 
 source "drivers/staging/ccree/Kconfig"
 
-source "drivers/staging/typec/Kconfig"
-
 source "drivers/staging/vboxvideo/Kconfig"
 
 source "drivers/staging/pi433/Kconfig"
diff --git a/drivers/staging/Makefile b/drivers/staging/Makefile
index 8951c37..4d1ccb4 100644
--- a/drivers/staging/Makefile
+++ b/drivers/staging/Makefile
@@ -1,7 +1,6 @@
 # Makefile for staging directory
 
 obj-y				+= media/
-obj-y				+= typec/
 obj-$(CONFIG_IRDA)		+= irda/net/
 obj-$(CONFIG_IRDA)		+= irda/drivers/
 obj-$(CONFIG_PRISM2_USB)	+= wlan-ng/
diff --git a/drivers/staging/typec/Kconfig b/drivers/staging/typec/Kconfig
deleted file mode 100644
index 5359f55..0000000
--- a/drivers/staging/typec/Kconfig
+++ /dev/null
@@ -1,14 +0,0 @@
-menu "USB Power Delivery and Type-C drivers"
-
-if TYPEC_TCPM
-
-config TYPEC_TCPCI
-	tristate "Type-C Port Controller Interface driver"
-	depends on I2C
-	select REGMAP_I2C
-	help
-	  Type-C Port Controller driver for TCPCI-compliant controller.
-
-endif
-
-endmenu
diff --git a/drivers/staging/typec/Makefile b/drivers/staging/typec/Makefile
deleted file mode 100644
index 53d649a..0000000
--- a/drivers/staging/typec/Makefile
+++ /dev/null
@@ -1 +0,0 @@
-obj-$(CONFIG_TYPEC_TCPCI)	+= tcpci.o
diff --git a/drivers/staging/typec/TODO b/drivers/staging/typec/TODO
deleted file mode 100644
index 53fe2f7..0000000
--- a/drivers/staging/typec/TODO
+++ /dev/null
@@ -1,5 +0,0 @@
-tcpci:
-- Test with real hardware
-
-Please send patches to Guenter Roeck <linux-0h96xk9xTtrk1uMJSBkQmQ@public.gmane.org> and copy
-Heikki Krogerus <heikki.krogerus-VuQAYsv1563Yd54FQh9/CA@public.gmane.org>.
diff --git a/drivers/staging/typec/tcpci.c b/drivers/staging/typec/tcpci.c
deleted file mode 100644
index 293a07c..0000000
--- a/drivers/staging/typec/tcpci.c
+++ /dev/null
@@ -1,637 +0,0 @@
-/*
- * Copyright 2015-2017 Google, Inc
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * USB Type-C Port Controller Interface.
- */
-
-#include <linux/delay.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/i2c.h>
-#include <linux/interrupt.h>
-#include <linux/regmap.h>
-#include <linux/usb/pd.h>
-#include <linux/usb/tcpm.h>
-#include <linux/usb/typec.h>
-
-#include "tcpci.h"
-
-#define PD_RETRY_COUNT 3
-
-struct tcpci {
-	struct device *dev;
-	struct i2c_client *client;
-
-	struct tcpm_port *port;
-
-	struct regmap *regmap;
-
-	bool controls_vbus;
-
-	struct tcpc_dev tcpc;
-};
-
-static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev *tcpc)
-{
-	return container_of(tcpc, struct tcpci, tcpc);
-}
-
-static int tcpci_read16(struct tcpci *tcpci, unsigned int reg,
-			unsigned int *val)
-{
-	return regmap_raw_read(tcpci->regmap, reg, val, sizeof(u16));
-}
-
-static int tcpci_write16(struct tcpci *tcpci, unsigned int reg, u16 val)
-{
-	return regmap_raw_write(tcpci->regmap, reg, &val, sizeof(u16));
-}
-
-static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc,
-			bool attached, enum typec_cc_polarity polarity)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned int reg = 0, reg_cc1 = 0, reg_cc2 = 0;
-	int ret;
-
-	switch (cc) {
-	case TYPEC_CC_RA:
-		reg = (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC1_SHIFT) |
-			(TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC2_SHIFT);
-		break;
-	case TYPEC_CC_RD:
-		reg_cc1 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT;
-		reg_cc2 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT;
-		break;
-	case TYPEC_CC_RP_DEF:
-		reg_cc1 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT;
-		reg_cc2 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT;
-		reg = TCPC_ROLE_CTRL_RP_VAL_DEF << TCPC_ROLE_CTRL_RP_VAL_SHIFT;
-		break;
-	case TYPEC_CC_RP_1_5:
-		reg_cc1 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT;
-		reg_cc2 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT;
-		reg = TCPC_ROLE_CTRL_RP_VAL_1_5 << TCPC_ROLE_CTRL_RP_VAL_SHIFT;
-		break;
-	case TYPEC_CC_RP_3_0:
-		reg_cc1 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT;
-		reg_cc2 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT;
-		reg = TCPC_ROLE_CTRL_RP_VAL_3_0 << TCPC_ROLE_CTRL_RP_VAL_SHIFT;
-		break;
-	case TYPEC_CC_OPEN:
-	default:
-		reg = (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT) |
-			(TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT);
-		break;
-	}
-
-	if (!attached)
-		reg |= reg_cc1 | reg_cc2;
-	else if (polarity == TYPEC_POLARITY_CC1)
-		reg |= reg_cc1;
-	else
-		reg |= reg_cc2;
-
-	ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc,
-				    enum typec_cc_status cc)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned int reg = TCPC_ROLE_CTRL_DRP;
-	int ret;
-
-	switch (cc) {
-	default:
-	case TYPEC_CC_RP_DEF:
-		reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF <<
-			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
-		break;
-	case TYPEC_CC_RP_1_5:
-		reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
-			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
-		break;
-	case TYPEC_CC_RP_3_0:
-		reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
-			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
-		break;
-	}
-
-	if (cc == TYPEC_CC_RD)
-		reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
-			(TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
-	else
-		reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
-			(TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);
-
-	ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
-	if (ret < 0)
-		return ret;
-
-	return regmap_write(tcpci->regmap, TCPC_COMMAND,
-				TCPC_CMD_LOOK4CONNECTION);
-}
-
-static enum typec_cc_status tcpci_to_typec_cc(unsigned int cc, bool sink)
-{
-	switch (cc) {
-	case 0x1:
-		return sink ? TYPEC_CC_RP_DEF : TYPEC_CC_RA;
-	case 0x2:
-		return sink ? TYPEC_CC_RP_1_5 : TYPEC_CC_RD;
-	case 0x3:
-		if (sink)
-			return TYPEC_CC_RP_3_0;
-	case 0x0:
-	default:
-		return TYPEC_CC_OPEN;
-	}
-}
-
-static int tcpci_get_cc(struct tcpc_dev *tcpc,
-			enum typec_cc_status *cc1, enum typec_cc_status *cc2)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned int reg;
-	int ret;
-
-	ret = regmap_read(tcpci->regmap, TCPC_CC_STATUS, &reg);
-	if (ret < 0)
-		return ret;
-
-	*cc1 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC1_SHIFT) &
-				 TCPC_CC_STATUS_CC1_MASK,
-				 reg & TCPC_CC_STATUS_TERM);
-	*cc2 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC2_SHIFT) &
-				 TCPC_CC_STATUS_CC2_MASK,
-				 reg & TCPC_CC_STATUS_TERM);
-
-	return 0;
-}
-
-static int tcpci_set_polarity(struct tcpc_dev *tcpc,
-			      enum typec_cc_polarity polarity)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	int ret;
-
-	ret = regmap_write(tcpci->regmap, TCPC_TCPC_CTRL,
-			   (polarity == TYPEC_POLARITY_CC2) ?
-			   TCPC_TCPC_CTRL_ORIENTATION : 0);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-
-	return regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL,
-				TCPC_POWER_CTRL_VCONN_ENABLE,
-				enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0);
-}
-
-static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached,
-			   enum typec_role role, enum typec_data_role data)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned int reg;
-	int ret;
-
-	reg = PD_REV20 << TCPC_MSG_HDR_INFO_REV_SHIFT;
-	if (role == TYPEC_SOURCE)
-		reg |= TCPC_MSG_HDR_INFO_PWR_ROLE;
-	if (data == TYPEC_HOST)
-		reg |= TCPC_MSG_HDR_INFO_DATA_ROLE;
-	ret = regmap_write(tcpci->regmap, TCPC_MSG_HDR_INFO, reg);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-static int tcpci_set_pd_rx(struct tcpc_dev *tcpc, bool enable)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned int reg = 0;
-	int ret;
-
-	if (enable)
-		reg = TCPC_RX_DETECT_SOP | TCPC_RX_DETECT_HARD_RESET;
-	ret = regmap_write(tcpci->regmap, TCPC_RX_DETECT, reg);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-static int tcpci_get_vbus(struct tcpc_dev *tcpc)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned int reg;
-	int ret;
-
-	ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, &reg);
-	if (ret < 0)
-		return ret;
-
-	return !!(reg & TCPC_POWER_STATUS_VBUS_PRES);
-}
-
-static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	int ret;
-
-	/* Disable both source and sink first before enabling anything */
-
-	if (!source) {
-		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
-				   TCPC_CMD_DISABLE_SRC_VBUS);
-		if (ret < 0)
-			return ret;
-	}
-
-	if (!sink) {
-		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
-				   TCPC_CMD_DISABLE_SINK_VBUS);
-		if (ret < 0)
-			return ret;
-	}
-
-	if (source) {
-		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
-				   TCPC_CMD_SRC_VBUS_DEFAULT);
-		if (ret < 0)
-			return ret;
-	}
-
-	if (sink) {
-		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
-				   TCPC_CMD_SINK_VBUS);
-		if (ret < 0)
-			return ret;
-	}
-
-	return 0;
-}
-
-static int tcpci_pd_transmit(struct tcpc_dev *tcpc,
-			     enum tcpm_transmit_type type,
-			     const struct pd_message *msg)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned int reg, cnt, header;
-	int ret;
-
-	cnt = msg ? pd_header_cnt(msg->header) * 4 : 0;
-	ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2);
-	if (ret < 0)
-		return ret;
-
-	header = msg ? msg->header : 0;
-	ret = tcpci_write16(tcpci, TCPC_TX_HDR, header);
-	if (ret < 0)
-		return ret;
-
-	if (cnt > 0) {
-		ret = regmap_raw_write(tcpci->regmap, TCPC_TX_DATA,
-				       &msg->payload, cnt);
-		if (ret < 0)
-			return ret;
-	}
-
-	reg = (PD_RETRY_COUNT << TCPC_TRANSMIT_RETRY_SHIFT) |
-		(type << TCPC_TRANSMIT_TYPE_SHIFT);
-	ret = regmap_write(tcpci->regmap, TCPC_TRANSMIT, reg);
-	if (ret < 0)
-		return ret;
-
-	return 0;
-}
-
-static int tcpci_vbus_detect(struct tcpc_dev *tcpc, bool enable)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	int ret;
-
-	if (enable) {
-		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
-				   TCPC_CMD_ENABLE_VBUS_DETECT);
-		if (ret < 0)
-			return ret;
-	} else {
-		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
-				   TCPC_CMD_DISABLE_VBUS_DETECT);
-		if (ret < 0)
-			return ret;
-	}
-
-	return 0;
-}
-
-static int tcpci_init(struct tcpc_dev *tcpc)
-{
-	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
-	unsigned long timeout = jiffies + msecs_to_jiffies(2000); /* XXX */
-	unsigned int reg;
-	int ret;
-
-	while (time_before_eq(jiffies, timeout)) {
-		ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, &reg);
-		if (ret < 0)
-			return ret;
-		if (!(reg & TCPC_POWER_STATUS_UNINIT))
-			break;
-		usleep_range(10000, 20000);
-	}
-	if (time_after(jiffies, timeout))
-		return -ETIMEDOUT;
-
-	/* Clear all events */
-	ret = tcpci_write16(tcpci, TCPC_ALERT, 0xffff);
-	if (ret < 0)
-		return ret;
-
-	if (tcpci->controls_vbus)
-		reg = TCPC_POWER_STATUS_VBUS_PRES;
-	else
-		reg = 0;
-	ret = regmap_write(tcpci->regmap, TCPC_POWER_STATUS_MASK, reg);
-	if (ret < 0)
-		return ret;
-
-	/* Enable Vbus detection */
-	tcpci_vbus_detect(tcpc, true);
-
-	reg = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_FAILED |
-		TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_RX_STATUS |
-		TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS;
-	if (tcpci->controls_vbus)
-		reg |= TCPC_ALERT_POWER_STATUS;
-	return tcpci_write16(tcpci, TCPC_ALERT_MASK, reg);
-}
-
-static irqreturn_t tcpci_irq(int irq, void *dev_id)
-{
-	struct tcpci *tcpci = dev_id;
-	unsigned int status, reg;
-
-	tcpci_read16(tcpci, TCPC_ALERT, &status);
-
-	/*
-	 * Clear alert status for everything except RX_STATUS, which shouldn't
-	 * be cleared until we have successfully retrieved message.
-	 */
-	if (status & ~TCPC_ALERT_RX_STATUS)
-		tcpci_write16(tcpci, TCPC_ALERT,
-			      status & ~TCPC_ALERT_RX_STATUS);
-
-	if (status & TCPC_ALERT_CC_STATUS)
-		tcpm_cc_change(tcpci->port);
-
-	if (status & TCPC_ALERT_POWER_STATUS) {
-		regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, &reg);
-
-		/*
-		 * If power status mask has been reset, then the TCPC
-		 * has reset.
-		 */
-		if (reg == 0xff)
-			tcpm_tcpc_reset(tcpci->port);
-		else
-			tcpm_vbus_change(tcpci->port);
-	}
-
-	if (status & TCPC_ALERT_RX_STATUS) {
-		struct pd_message msg;
-		unsigned int cnt;
-
-		regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt);
-
-		tcpci_read16(tcpci, TCPC_RX_HDR, &reg);
-		msg.header = reg;
-
-		if (WARN_ON(cnt > sizeof(msg.payload)))
-			cnt = sizeof(msg.payload);
-
-		if (cnt > 0)
-			regmap_raw_read(tcpci->regmap, TCPC_RX_DATA,
-					&msg.payload, cnt);
-
-		/* Read complete, clear RX status alert bit */
-		tcpci_write16(tcpci, TCPC_ALERT, TCPC_ALERT_RX_STATUS);
-
-		tcpm_pd_receive(tcpci->port, &msg);
-	}
-
-	if (status & TCPC_ALERT_RX_HARD_RST)
-		tcpm_pd_hard_reset(tcpci->port);
-
-	if (status & TCPC_ALERT_TX_SUCCESS)
-		tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_SUCCESS);
-	else if (status & TCPC_ALERT_TX_DISCARDED)
-		tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_DISCARDED);
-	else if (status & TCPC_ALERT_TX_FAILED)
-		tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_FAILED);
-
-	return IRQ_HANDLED;
-}
-
-static const struct regmap_config tcpci_regmap_config = {
-	.reg_bits = 8,
-	.val_bits = 8,
-
-	.max_register = 0x7F, /* 0x80 .. 0xFF are vendor defined */
-};
-
-/* Populate struct tcpc_config from device-tree */
-static int tcpci_parse_config(struct tcpci *tcpci)
-{
-	struct tcpc_config *tcfg;
-	int ret = -EINVAL;
-
-	tcpci->controls_vbus = true; /* XXX */
-
-	tcpci->tcpc.config = devm_kzalloc(tcpci->dev, sizeof(*tcfg),
-					  GFP_KERNEL);
-	if (!tcpci->tcpc.config)
-		return -ENOMEM;
-
-	tcfg = tcpci->tcpc.config;
-
-	/* Get port-type */
-	ret = typec_get_port_type(tcpci->dev);
-	if (ret < 0) {
-		dev_err(tcpci->dev, "typec port type is NOT correct!\n");
-		return ret;
-	}
-	tcfg->type = ret;
-
-	if (tcfg->type == TYPEC_PORT_UFP)
-		goto sink;
-
-	/* Get source PDO */
-	tcfg->nr_src_pdo = device_property_read_u32_array(tcpci->dev,
-						"src-pdos", NULL, 0);
-	if (tcfg->nr_src_pdo <= 0) {
-		dev_err(tcpci->dev, "typec source pdo is missing!\n");
-		return -EINVAL;
-	}
-
-	tcfg->src_pdo = devm_kzalloc(tcpci->dev,
-		sizeof(*tcfg->src_pdo) * tcfg->nr_src_pdo, GFP_KERNEL);
-	if (!tcfg->src_pdo)
-		return -ENOMEM;
-
-	ret = device_property_read_u32_array(tcpci->dev, "src-pdos",
-				tcfg->src_pdo, tcfg->nr_src_pdo);
-	if (ret) {
-		dev_err(tcpci->dev, "Failed to read src pdo!\n");
-		return -EINVAL;
-	}
-
-	if (tcfg->type == TYPEC_PORT_DFP)
-		return 0;
-
-	/* Get the preferred power role for drp */
-	ret = typec_get_power_role(tcpci->dev);
-	if (ret < 0) {
-		dev_err(tcpci->dev, "typec preferred role is wrong!\n");
-		return ret;
-	}
-	tcfg->default_role = ret;
-sink:
-	/* Get sink power capability */
-	tcfg->nr_snk_pdo = device_property_read_u32_array(tcpci->dev,
-						"snk-pdos", NULL, 0);
-	if (tcfg->nr_snk_pdo <= 0) {
-		dev_err(tcpci->dev, "typec sink pdo is missing!\n");
-		return -EINVAL;
-	}
-
-	tcfg->snk_pdo = devm_kzalloc(tcpci->dev,
-		sizeof(*tcfg->snk_pdo) * tcfg->nr_snk_pdo, GFP_KERNEL);
-	if (!tcfg->snk_pdo)
-		return -ENOMEM;
-
-	ret = device_property_read_u32_array(tcpci->dev, "snk-pdos",
-				tcfg->snk_pdo, tcfg->nr_snk_pdo);
-	if (ret) {
-		dev_err(tcpci->dev, "Failed to read sink pdo!\n");
-		return -EINVAL;
-	}
-
-	if (device_property_read_u32(tcpci->dev, "max-snk-mv",
-				     &tcfg->max_snk_mv) ||
-		device_property_read_u32(tcpci->dev, "max-snk-ma",
-					 &tcfg->max_snk_ma) ||
-		device_property_read_u32(tcpci->dev, "op-snk-mw",
-					 &tcfg->operating_snk_mw)) {
-		dev_err(tcpci->dev, "Failed to read sink capability!\n");
-		return -EINVAL;
-	}
-
-	return 0;
-}
-
-static int tcpci_probe(struct i2c_client *client,
-		       const struct i2c_device_id *i2c_id)
-{
-	struct tcpci *tcpci;
-	int err;
-
-	tcpci = devm_kzalloc(&client->dev, sizeof(*tcpci), GFP_KERNEL);
-	if (!tcpci)
-		return -ENOMEM;
-
-	tcpci->client = client;
-	tcpci->dev = &client->dev;
-	i2c_set_clientdata(client, tcpci);
-	tcpci->regmap = devm_regmap_init_i2c(client, &tcpci_regmap_config);
-	if (IS_ERR(tcpci->regmap))
-		return PTR_ERR(tcpci->regmap);
-
-	tcpci->tcpc.init = tcpci_init;
-	tcpci->tcpc.get_vbus = tcpci_get_vbus;
-	tcpci->tcpc.set_vbus = tcpci_set_vbus;
-	tcpci->tcpc.set_cc = tcpci_set_cc;
-	tcpci->tcpc.get_cc = tcpci_get_cc;
-	tcpci->tcpc.set_polarity = tcpci_set_polarity;
-	tcpci->tcpc.set_vconn = tcpci_set_vconn;
-	tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling;
-
-	tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx;
-	tcpci->tcpc.set_roles = tcpci_set_roles;
-	tcpci->tcpc.pd_transmit = tcpci_pd_transmit;
-
-	err = tcpci_parse_config(tcpci);
-	if (err < 0)
-		return err;
-
-	/* Disable chip interrupts */
-	tcpci_write16(tcpci, TCPC_ALERT_MASK, 0);
-
-	tcpci->port = tcpm_register_port(tcpci->dev, &tcpci->tcpc);
-	if (IS_ERR(tcpci->port))
-		return PTR_ERR(tcpci->port);
-
-	return devm_request_threaded_irq(tcpci->dev, client->irq, NULL,
-					tcpci_irq,
-					IRQF_ONESHOT | IRQF_TRIGGER_LOW,
-					dev_name(tcpci->dev), tcpci);
-}
-
-static int tcpci_remove(struct i2c_client *client)
-{
-	struct tcpci *tcpci = i2c_get_clientdata(client);
-
-	tcpm_unregister_port(tcpci->port);
-
-	return 0;
-}
-
-static const struct i2c_device_id tcpci_id[] = {
-	{ "tcpci", 0 },
-	{ }
-};
-MODULE_DEVICE_TABLE(i2c, tcpci_id);
-
-#ifdef CONFIG_OF
-static const struct of_device_id tcpci_of_match[] = {
-	{ .compatible = "usb,tcpci", },
-	{},
-};
-MODULE_DEVICE_TABLE(of, tcpci_of_match);
-#endif
-
-static struct i2c_driver tcpci_i2c_driver = {
-	.driver = {
-		.name = "tcpci",
-		.of_match_table = of_match_ptr(tcpci_of_match),
-	},
-	.probe = tcpci_probe,
-	.remove = tcpci_remove,
-	.id_table = tcpci_id,
-};
-module_i2c_driver(tcpci_i2c_driver);
-
-MODULE_DESCRIPTION("USB Type-C Port Controller Interface driver");
-MODULE_LICENSE("GPL");
diff --git a/drivers/staging/typec/tcpci.h b/drivers/staging/typec/tcpci.h
deleted file mode 100644
index 10b04c8..0000000
--- a/drivers/staging/typec/tcpci.h
+++ /dev/null
@@ -1,133 +0,0 @@
-/*
- * Copyright 2015-2017 Google, Inc
- *
- * This program is free software; you can redistribute it and/or modify
- * it under the terms of the GNU General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or
- * (at your option) any later version.
- *
- * This program is distributed in the hope that it will be useful,
- * but WITHOUT ANY WARRANTY; without even the implied warranty of
- * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
- * GNU General Public License for more details.
- *
- * USB Type-C Port Controller Interface.
- */
-
-#ifndef __LINUX_USB_TCPCI_H
-#define __LINUX_USB_TCPCI_H
-
-#define TCPC_VENDOR_ID			0x0
-#define TCPC_PRODUCT_ID			0x2
-#define TCPC_BCD_DEV			0x4
-#define TCPC_TC_REV			0x6
-#define TCPC_PD_REV			0x8
-#define TCPC_PD_INT_REV			0xa
-
-#define TCPC_ALERT			0x10
-#define TCPC_ALERT_VBUS_DISCNCT		BIT(11)
-#define TCPC_ALERT_RX_BUF_OVF		BIT(10)
-#define TCPC_ALERT_FAULT		BIT(9)
-#define TCPC_ALERT_V_ALARM_LO		BIT(8)
-#define TCPC_ALERT_V_ALARM_HI		BIT(7)
-#define TCPC_ALERT_TX_SUCCESS		BIT(6)
-#define TCPC_ALERT_TX_DISCARDED		BIT(5)
-#define TCPC_ALERT_TX_FAILED		BIT(4)
-#define TCPC_ALERT_RX_HARD_RST		BIT(3)
-#define TCPC_ALERT_RX_STATUS		BIT(2)
-#define TCPC_ALERT_POWER_STATUS		BIT(1)
-#define TCPC_ALERT_CC_STATUS		BIT(0)
-
-#define TCPC_ALERT_MASK			0x12
-#define TCPC_POWER_STATUS_MASK		0x14
-#define TCPC_FAULT_STATUS_MASK		0x15
-#define TCPC_CONFIG_STD_OUTPUT		0x18
-
-#define TCPC_TCPC_CTRL			0x19
-#define TCPC_TCPC_CTRL_ORIENTATION	BIT(0)
-
-#define TCPC_ROLE_CTRL			0x1a
-#define TCPC_ROLE_CTRL_DRP		BIT(6)
-#define TCPC_ROLE_CTRL_RP_VAL_SHIFT	4
-#define TCPC_ROLE_CTRL_RP_VAL_MASK	0x3
-#define TCPC_ROLE_CTRL_RP_VAL_DEF	0x0
-#define TCPC_ROLE_CTRL_RP_VAL_1_5	0x1
-#define TCPC_ROLE_CTRL_RP_VAL_3_0	0x2
-#define TCPC_ROLE_CTRL_CC2_SHIFT	2
-#define TCPC_ROLE_CTRL_CC2_MASK		0x3
-#define TCPC_ROLE_CTRL_CC1_SHIFT	0
-#define TCPC_ROLE_CTRL_CC1_MASK		0x3
-#define TCPC_ROLE_CTRL_CC_RA		0x0
-#define TCPC_ROLE_CTRL_CC_RP		0x1
-#define TCPC_ROLE_CTRL_CC_RD		0x2
-#define TCPC_ROLE_CTRL_CC_OPEN		0x3
-
-#define TCPC_FAULT_CTRL			0x1b
-
-#define TCPC_POWER_CTRL			0x1c
-#define TCPC_POWER_CTRL_VCONN_ENABLE	BIT(0)
-
-#define TCPC_CC_STATUS			0x1d
-#define TCPC_CC_STATUS_TERM		BIT(4)
-#define TCPC_CC_STATUS_CC2_SHIFT	2
-#define TCPC_CC_STATUS_CC2_MASK		0x3
-#define TCPC_CC_STATUS_CC1_SHIFT	0
-#define TCPC_CC_STATUS_CC1_MASK		0x3
-
-#define TCPC_POWER_STATUS		0x1e
-#define TCPC_POWER_STATUS_UNINIT	BIT(6)
-#define TCPC_POWER_STATUS_VBUS_DET	BIT(3)
-#define TCPC_POWER_STATUS_VBUS_PRES	BIT(2)
-
-#define TCPC_FAULT_STATUS		0x1f
-
-#define TCPC_COMMAND			0x23
-#define TCPC_CMD_WAKE_I2C		0x11
-#define TCPC_CMD_DISABLE_VBUS_DETECT	0x22
-#define TCPC_CMD_ENABLE_VBUS_DETECT	0x33
-#define TCPC_CMD_DISABLE_SINK_VBUS	0x44
-#define TCPC_CMD_SINK_VBUS		0x55
-#define TCPC_CMD_DISABLE_SRC_VBUS	0x66
-#define TCPC_CMD_SRC_VBUS_DEFAULT	0x77
-#define TCPC_CMD_SRC_VBUS_HIGH		0x88
-#define TCPC_CMD_LOOK4CONNECTION	0x99
-#define TCPC_CMD_RXONEMORE		0xAA
-#define TCPC_CMD_I2C_IDLE		0xFF
-
-#define TCPC_DEV_CAP_1			0x24
-#define TCPC_DEV_CAP_2			0x26
-#define TCPC_STD_INPUT_CAP		0x28
-#define TCPC_STD_OUTPUT_CAP		0x29
-
-#define TCPC_MSG_HDR_INFO		0x2e
-#define TCPC_MSG_HDR_INFO_DATA_ROLE	BIT(3)
-#define TCPC_MSG_HDR_INFO_PWR_ROLE	BIT(0)
-#define TCPC_MSG_HDR_INFO_REV_SHIFT	1
-#define TCPC_MSG_HDR_INFO_REV_MASK	0x3
-
-#define TCPC_RX_DETECT			0x2f
-#define TCPC_RX_DETECT_HARD_RESET	BIT(5)
-#define TCPC_RX_DETECT_SOP		BIT(0)
-
-#define TCPC_RX_BYTE_CNT		0x30
-#define TCPC_RX_BUF_FRAME_TYPE		0x31
-#define TCPC_RX_HDR			0x32
-#define TCPC_RX_DATA			0x34 /* through 0x4f */
-
-#define TCPC_TRANSMIT			0x50
-#define TCPC_TRANSMIT_RETRY_SHIFT	4
-#define TCPC_TRANSMIT_RETRY_MASK	0x3
-#define TCPC_TRANSMIT_TYPE_SHIFT	0
-#define TCPC_TRANSMIT_TYPE_MASK		0x7
-
-#define TCPC_TX_BYTE_CNT		0x51
-#define TCPC_TX_HDR			0x52
-#define TCPC_TX_DATA			0x54 /* through 0x6f */
-
-#define TCPC_VBUS_VOLTAGE			0x70
-#define TCPC_VBUS_SINK_DISCONNECT_THRESH	0x72
-#define TCPC_VBUS_STOP_DISCHARGE_THRESH		0x74
-#define TCPC_VBUS_VOLTAGE_ALARM_HI_CFG		0x76
-#define TCPC_VBUS_VOLTAGE_ALARM_LO_CFG		0x78
-
-#endif /* __LINUX_USB_TCPCI_H */
diff --git a/drivers/usb/typec/Kconfig b/drivers/usb/typec/Kconfig
index 819c0ed..33b04c4 100644
--- a/drivers/usb/typec/Kconfig
+++ b/drivers/usb/typec/Kconfig
@@ -14,6 +14,13 @@ config TYPEC_TCPM
 
 if TYPEC_TCPM
 
+config TYPEC_TCPCI
+	tristate "Type-C Port Controller Interface driver"
+	depends on I2C
+	select REGMAP_I2C
+	help
+	  Type-C Port Controller driver for TCPCI-compliant controller.
+
 source "drivers/usb/typec/fusb302/Kconfig"
 
 endif
diff --git a/drivers/usb/typec/Makefile b/drivers/usb/typec/Makefile
index b77688c..c2fbf17 100644
--- a/drivers/usb/typec/Makefile
+++ b/drivers/usb/typec/Makefile
@@ -3,3 +3,4 @@ obj-$(CONFIG_TYPEC_TCPM)	+= tcpm.o
 obj-y				+= fusb302/
 obj-$(CONFIG_TYPEC_WCOVE)	+= typec_wcove.o
 obj-$(CONFIG_TYPEC_UCSI)	+= ucsi/
+obj-$(CONFIG_TYPEC_TCPCI)	+= tcpci.o
diff --git a/drivers/usb/typec/tcpci.c b/drivers/usb/typec/tcpci.c
new file mode 100644
index 0000000..293a07c
--- /dev/null
+++ b/drivers/usb/typec/tcpci.c
@@ -0,0 +1,637 @@
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * USB Type-C Port Controller Interface.
+ */
+
+#include <linux/delay.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <linux/interrupt.h>
+#include <linux/regmap.h>
+#include <linux/usb/pd.h>
+#include <linux/usb/tcpm.h>
+#include <linux/usb/typec.h>
+
+#include "tcpci.h"
+
+#define PD_RETRY_COUNT 3
+
+struct tcpci {
+	struct device *dev;
+	struct i2c_client *client;
+
+	struct tcpm_port *port;
+
+	struct regmap *regmap;
+
+	bool controls_vbus;
+
+	struct tcpc_dev tcpc;
+};
+
+static inline struct tcpci *tcpc_to_tcpci(struct tcpc_dev *tcpc)
+{
+	return container_of(tcpc, struct tcpci, tcpc);
+}
+
+static int tcpci_read16(struct tcpci *tcpci, unsigned int reg,
+			unsigned int *val)
+{
+	return regmap_raw_read(tcpci->regmap, reg, val, sizeof(u16));
+}
+
+static int tcpci_write16(struct tcpci *tcpci, unsigned int reg, u16 val)
+{
+	return regmap_raw_write(tcpci->regmap, reg, &val, sizeof(u16));
+}
+
+static int tcpci_set_cc(struct tcpc_dev *tcpc, enum typec_cc_status cc,
+			bool attached, enum typec_cc_polarity polarity)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg = 0, reg_cc1 = 0, reg_cc2 = 0;
+	int ret;
+
+	switch (cc) {
+	case TYPEC_CC_RA:
+		reg = (TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC1_SHIFT) |
+			(TCPC_ROLE_CTRL_CC_RA << TCPC_ROLE_CTRL_CC2_SHIFT);
+		break;
+	case TYPEC_CC_RD:
+		reg_cc1 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT;
+		reg_cc2 = TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT;
+		break;
+	case TYPEC_CC_RP_DEF:
+		reg_cc1 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT;
+		reg_cc2 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT;
+		reg = TCPC_ROLE_CTRL_RP_VAL_DEF << TCPC_ROLE_CTRL_RP_VAL_SHIFT;
+		break;
+	case TYPEC_CC_RP_1_5:
+		reg_cc1 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT;
+		reg_cc2 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT;
+		reg = TCPC_ROLE_CTRL_RP_VAL_1_5 << TCPC_ROLE_CTRL_RP_VAL_SHIFT;
+		break;
+	case TYPEC_CC_RP_3_0:
+		reg_cc1 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT;
+		reg_cc2 = TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT;
+		reg = TCPC_ROLE_CTRL_RP_VAL_3_0 << TCPC_ROLE_CTRL_RP_VAL_SHIFT;
+		break;
+	case TYPEC_CC_OPEN:
+	default:
+		reg = (TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC1_SHIFT) |
+			(TCPC_ROLE_CTRL_CC_OPEN << TCPC_ROLE_CTRL_CC2_SHIFT);
+		break;
+	}
+
+	if (!attached)
+		reg |= reg_cc1 | reg_cc2;
+	else if (polarity == TYPEC_POLARITY_CC1)
+		reg |= reg_cc1;
+	else
+		reg |= reg_cc2;
+
+	ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tcpci_start_drp_toggling(struct tcpc_dev *tcpc,
+				    enum typec_cc_status cc)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg = TCPC_ROLE_CTRL_DRP;
+	int ret;
+
+	switch (cc) {
+	default:
+	case TYPEC_CC_RP_DEF:
+		reg |= (TCPC_ROLE_CTRL_RP_VAL_DEF <<
+			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+		break;
+	case TYPEC_CC_RP_1_5:
+		reg |= (TCPC_ROLE_CTRL_RP_VAL_1_5 <<
+			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+		break;
+	case TYPEC_CC_RP_3_0:
+		reg |= (TCPC_ROLE_CTRL_RP_VAL_3_0 <<
+			TCPC_ROLE_CTRL_RP_VAL_SHIFT);
+		break;
+	}
+
+	if (cc == TYPEC_CC_RD)
+		reg |= (TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC1_SHIFT) |
+			(TCPC_ROLE_CTRL_CC_RD << TCPC_ROLE_CTRL_CC2_SHIFT);
+	else
+		reg |= (TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC1_SHIFT) |
+			(TCPC_ROLE_CTRL_CC_RP << TCPC_ROLE_CTRL_CC2_SHIFT);
+
+	ret = regmap_write(tcpci->regmap, TCPC_ROLE_CTRL, reg);
+	if (ret < 0)
+		return ret;
+
+	return regmap_write(tcpci->regmap, TCPC_COMMAND,
+				TCPC_CMD_LOOK4CONNECTION);
+}
+
+static enum typec_cc_status tcpci_to_typec_cc(unsigned int cc, bool sink)
+{
+	switch (cc) {
+	case 0x1:
+		return sink ? TYPEC_CC_RP_DEF : TYPEC_CC_RA;
+	case 0x2:
+		return sink ? TYPEC_CC_RP_1_5 : TYPEC_CC_RD;
+	case 0x3:
+		if (sink)
+			return TYPEC_CC_RP_3_0;
+	case 0x0:
+	default:
+		return TYPEC_CC_OPEN;
+	}
+}
+
+static int tcpci_get_cc(struct tcpc_dev *tcpc,
+			enum typec_cc_status *cc1, enum typec_cc_status *cc2)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(tcpci->regmap, TCPC_CC_STATUS, &reg);
+	if (ret < 0)
+		return ret;
+
+	*cc1 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC1_SHIFT) &
+				 TCPC_CC_STATUS_CC1_MASK,
+				 reg & TCPC_CC_STATUS_TERM);
+	*cc2 = tcpci_to_typec_cc((reg >> TCPC_CC_STATUS_CC2_SHIFT) &
+				 TCPC_CC_STATUS_CC2_MASK,
+				 reg & TCPC_CC_STATUS_TERM);
+
+	return 0;
+}
+
+static int tcpci_set_polarity(struct tcpc_dev *tcpc,
+			      enum typec_cc_polarity polarity)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	int ret;
+
+	ret = regmap_write(tcpci->regmap, TCPC_TCPC_CTRL,
+			   (polarity == TYPEC_POLARITY_CC2) ?
+			   TCPC_TCPC_CTRL_ORIENTATION : 0);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tcpci_set_vconn(struct tcpc_dev *tcpc, bool enable)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+
+	return regmap_update_bits(tcpci->regmap, TCPC_POWER_CTRL,
+				TCPC_POWER_CTRL_VCONN_ENABLE,
+				enable ? TCPC_POWER_CTRL_VCONN_ENABLE : 0);
+}
+
+static int tcpci_set_roles(struct tcpc_dev *tcpc, bool attached,
+			   enum typec_role role, enum typec_data_role data)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg;
+	int ret;
+
+	reg = PD_REV20 << TCPC_MSG_HDR_INFO_REV_SHIFT;
+	if (role == TYPEC_SOURCE)
+		reg |= TCPC_MSG_HDR_INFO_PWR_ROLE;
+	if (data == TYPEC_HOST)
+		reg |= TCPC_MSG_HDR_INFO_DATA_ROLE;
+	ret = regmap_write(tcpci->regmap, TCPC_MSG_HDR_INFO, reg);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tcpci_set_pd_rx(struct tcpc_dev *tcpc, bool enable)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg = 0;
+	int ret;
+
+	if (enable)
+		reg = TCPC_RX_DETECT_SOP | TCPC_RX_DETECT_HARD_RESET;
+	ret = regmap_write(tcpci->regmap, TCPC_RX_DETECT, reg);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tcpci_get_vbus(struct tcpc_dev *tcpc)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg;
+	int ret;
+
+	ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, &reg);
+	if (ret < 0)
+		return ret;
+
+	return !!(reg & TCPC_POWER_STATUS_VBUS_PRES);
+}
+
+static int tcpci_set_vbus(struct tcpc_dev *tcpc, bool source, bool sink)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	int ret;
+
+	/* Disable both source and sink first before enabling anything */
+
+	if (!source) {
+		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+				   TCPC_CMD_DISABLE_SRC_VBUS);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (!sink) {
+		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+				   TCPC_CMD_DISABLE_SINK_VBUS);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (source) {
+		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+				   TCPC_CMD_SRC_VBUS_DEFAULT);
+		if (ret < 0)
+			return ret;
+	}
+
+	if (sink) {
+		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+				   TCPC_CMD_SINK_VBUS);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int tcpci_pd_transmit(struct tcpc_dev *tcpc,
+			     enum tcpm_transmit_type type,
+			     const struct pd_message *msg)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned int reg, cnt, header;
+	int ret;
+
+	cnt = msg ? pd_header_cnt(msg->header) * 4 : 0;
+	ret = regmap_write(tcpci->regmap, TCPC_TX_BYTE_CNT, cnt + 2);
+	if (ret < 0)
+		return ret;
+
+	header = msg ? msg->header : 0;
+	ret = tcpci_write16(tcpci, TCPC_TX_HDR, header);
+	if (ret < 0)
+		return ret;
+
+	if (cnt > 0) {
+		ret = regmap_raw_write(tcpci->regmap, TCPC_TX_DATA,
+				       &msg->payload, cnt);
+		if (ret < 0)
+			return ret;
+	}
+
+	reg = (PD_RETRY_COUNT << TCPC_TRANSMIT_RETRY_SHIFT) |
+		(type << TCPC_TRANSMIT_TYPE_SHIFT);
+	ret = regmap_write(tcpci->regmap, TCPC_TRANSMIT, reg);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int tcpci_vbus_detect(struct tcpc_dev *tcpc, bool enable)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	int ret;
+
+	if (enable) {
+		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+				   TCPC_CMD_ENABLE_VBUS_DETECT);
+		if (ret < 0)
+			return ret;
+	} else {
+		ret = regmap_write(tcpci->regmap, TCPC_COMMAND,
+				   TCPC_CMD_DISABLE_VBUS_DETECT);
+		if (ret < 0)
+			return ret;
+	}
+
+	return 0;
+}
+
+static int tcpci_init(struct tcpc_dev *tcpc)
+{
+	struct tcpci *tcpci = tcpc_to_tcpci(tcpc);
+	unsigned long timeout = jiffies + msecs_to_jiffies(2000); /* XXX */
+	unsigned int reg;
+	int ret;
+
+	while (time_before_eq(jiffies, timeout)) {
+		ret = regmap_read(tcpci->regmap, TCPC_POWER_STATUS, &reg);
+		if (ret < 0)
+			return ret;
+		if (!(reg & TCPC_POWER_STATUS_UNINIT))
+			break;
+		usleep_range(10000, 20000);
+	}
+	if (time_after(jiffies, timeout))
+		return -ETIMEDOUT;
+
+	/* Clear all events */
+	ret = tcpci_write16(tcpci, TCPC_ALERT, 0xffff);
+	if (ret < 0)
+		return ret;
+
+	if (tcpci->controls_vbus)
+		reg = TCPC_POWER_STATUS_VBUS_PRES;
+	else
+		reg = 0;
+	ret = regmap_write(tcpci->regmap, TCPC_POWER_STATUS_MASK, reg);
+	if (ret < 0)
+		return ret;
+
+	/* Enable Vbus detection */
+	tcpci_vbus_detect(tcpc, true);
+
+	reg = TCPC_ALERT_TX_SUCCESS | TCPC_ALERT_TX_FAILED |
+		TCPC_ALERT_TX_DISCARDED | TCPC_ALERT_RX_STATUS |
+		TCPC_ALERT_RX_HARD_RST | TCPC_ALERT_CC_STATUS;
+	if (tcpci->controls_vbus)
+		reg |= TCPC_ALERT_POWER_STATUS;
+	return tcpci_write16(tcpci, TCPC_ALERT_MASK, reg);
+}
+
+static irqreturn_t tcpci_irq(int irq, void *dev_id)
+{
+	struct tcpci *tcpci = dev_id;
+	unsigned int status, reg;
+
+	tcpci_read16(tcpci, TCPC_ALERT, &status);
+
+	/*
+	 * Clear alert status for everything except RX_STATUS, which shouldn't
+	 * be cleared until we have successfully retrieved message.
+	 */
+	if (status & ~TCPC_ALERT_RX_STATUS)
+		tcpci_write16(tcpci, TCPC_ALERT,
+			      status & ~TCPC_ALERT_RX_STATUS);
+
+	if (status & TCPC_ALERT_CC_STATUS)
+		tcpm_cc_change(tcpci->port);
+
+	if (status & TCPC_ALERT_POWER_STATUS) {
+		regmap_read(tcpci->regmap, TCPC_POWER_STATUS_MASK, &reg);
+
+		/*
+		 * If power status mask has been reset, then the TCPC
+		 * has reset.
+		 */
+		if (reg == 0xff)
+			tcpm_tcpc_reset(tcpci->port);
+		else
+			tcpm_vbus_change(tcpci->port);
+	}
+
+	if (status & TCPC_ALERT_RX_STATUS) {
+		struct pd_message msg;
+		unsigned int cnt;
+
+		regmap_read(tcpci->regmap, TCPC_RX_BYTE_CNT, &cnt);
+
+		tcpci_read16(tcpci, TCPC_RX_HDR, &reg);
+		msg.header = reg;
+
+		if (WARN_ON(cnt > sizeof(msg.payload)))
+			cnt = sizeof(msg.payload);
+
+		if (cnt > 0)
+			regmap_raw_read(tcpci->regmap, TCPC_RX_DATA,
+					&msg.payload, cnt);
+
+		/* Read complete, clear RX status alert bit */
+		tcpci_write16(tcpci, TCPC_ALERT, TCPC_ALERT_RX_STATUS);
+
+		tcpm_pd_receive(tcpci->port, &msg);
+	}
+
+	if (status & TCPC_ALERT_RX_HARD_RST)
+		tcpm_pd_hard_reset(tcpci->port);
+
+	if (status & TCPC_ALERT_TX_SUCCESS)
+		tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_SUCCESS);
+	else if (status & TCPC_ALERT_TX_DISCARDED)
+		tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_DISCARDED);
+	else if (status & TCPC_ALERT_TX_FAILED)
+		tcpm_pd_transmit_complete(tcpci->port, TCPC_TX_FAILED);
+
+	return IRQ_HANDLED;
+}
+
+static const struct regmap_config tcpci_regmap_config = {
+	.reg_bits = 8,
+	.val_bits = 8,
+
+	.max_register = 0x7F, /* 0x80 .. 0xFF are vendor defined */
+};
+
+/* Populate struct tcpc_config from device-tree */
+static int tcpci_parse_config(struct tcpci *tcpci)
+{
+	struct tcpc_config *tcfg;
+	int ret = -EINVAL;
+
+	tcpci->controls_vbus = true; /* XXX */
+
+	tcpci->tcpc.config = devm_kzalloc(tcpci->dev, sizeof(*tcfg),
+					  GFP_KERNEL);
+	if (!tcpci->tcpc.config)
+		return -ENOMEM;
+
+	tcfg = tcpci->tcpc.config;
+
+	/* Get port-type */
+	ret = typec_get_port_type(tcpci->dev);
+	if (ret < 0) {
+		dev_err(tcpci->dev, "typec port type is NOT correct!\n");
+		return ret;
+	}
+	tcfg->type = ret;
+
+	if (tcfg->type == TYPEC_PORT_UFP)
+		goto sink;
+
+	/* Get source PDO */
+	tcfg->nr_src_pdo = device_property_read_u32_array(tcpci->dev,
+						"src-pdos", NULL, 0);
+	if (tcfg->nr_src_pdo <= 0) {
+		dev_err(tcpci->dev, "typec source pdo is missing!\n");
+		return -EINVAL;
+	}
+
+	tcfg->src_pdo = devm_kzalloc(tcpci->dev,
+		sizeof(*tcfg->src_pdo) * tcfg->nr_src_pdo, GFP_KERNEL);
+	if (!tcfg->src_pdo)
+		return -ENOMEM;
+
+	ret = device_property_read_u32_array(tcpci->dev, "src-pdos",
+				tcfg->src_pdo, tcfg->nr_src_pdo);
+	if (ret) {
+		dev_err(tcpci->dev, "Failed to read src pdo!\n");
+		return -EINVAL;
+	}
+
+	if (tcfg->type == TYPEC_PORT_DFP)
+		return 0;
+
+	/* Get the preferred power role for drp */
+	ret = typec_get_power_role(tcpci->dev);
+	if (ret < 0) {
+		dev_err(tcpci->dev, "typec preferred role is wrong!\n");
+		return ret;
+	}
+	tcfg->default_role = ret;
+sink:
+	/* Get sink power capability */
+	tcfg->nr_snk_pdo = device_property_read_u32_array(tcpci->dev,
+						"snk-pdos", NULL, 0);
+	if (tcfg->nr_snk_pdo <= 0) {
+		dev_err(tcpci->dev, "typec sink pdo is missing!\n");
+		return -EINVAL;
+	}
+
+	tcfg->snk_pdo = devm_kzalloc(tcpci->dev,
+		sizeof(*tcfg->snk_pdo) * tcfg->nr_snk_pdo, GFP_KERNEL);
+	if (!tcfg->snk_pdo)
+		return -ENOMEM;
+
+	ret = device_property_read_u32_array(tcpci->dev, "snk-pdos",
+				tcfg->snk_pdo, tcfg->nr_snk_pdo);
+	if (ret) {
+		dev_err(tcpci->dev, "Failed to read sink pdo!\n");
+		return -EINVAL;
+	}
+
+	if (device_property_read_u32(tcpci->dev, "max-snk-mv",
+				     &tcfg->max_snk_mv) ||
+		device_property_read_u32(tcpci->dev, "max-snk-ma",
+					 &tcfg->max_snk_ma) ||
+		device_property_read_u32(tcpci->dev, "op-snk-mw",
+					 &tcfg->operating_snk_mw)) {
+		dev_err(tcpci->dev, "Failed to read sink capability!\n");
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int tcpci_probe(struct i2c_client *client,
+		       const struct i2c_device_id *i2c_id)
+{
+	struct tcpci *tcpci;
+	int err;
+
+	tcpci = devm_kzalloc(&client->dev, sizeof(*tcpci), GFP_KERNEL);
+	if (!tcpci)
+		return -ENOMEM;
+
+	tcpci->client = client;
+	tcpci->dev = &client->dev;
+	i2c_set_clientdata(client, tcpci);
+	tcpci->regmap = devm_regmap_init_i2c(client, &tcpci_regmap_config);
+	if (IS_ERR(tcpci->regmap))
+		return PTR_ERR(tcpci->regmap);
+
+	tcpci->tcpc.init = tcpci_init;
+	tcpci->tcpc.get_vbus = tcpci_get_vbus;
+	tcpci->tcpc.set_vbus = tcpci_set_vbus;
+	tcpci->tcpc.set_cc = tcpci_set_cc;
+	tcpci->tcpc.get_cc = tcpci_get_cc;
+	tcpci->tcpc.set_polarity = tcpci_set_polarity;
+	tcpci->tcpc.set_vconn = tcpci_set_vconn;
+	tcpci->tcpc.start_drp_toggling = tcpci_start_drp_toggling;
+
+	tcpci->tcpc.set_pd_rx = tcpci_set_pd_rx;
+	tcpci->tcpc.set_roles = tcpci_set_roles;
+	tcpci->tcpc.pd_transmit = tcpci_pd_transmit;
+
+	err = tcpci_parse_config(tcpci);
+	if (err < 0)
+		return err;
+
+	/* Disable chip interrupts */
+	tcpci_write16(tcpci, TCPC_ALERT_MASK, 0);
+
+	tcpci->port = tcpm_register_port(tcpci->dev, &tcpci->tcpc);
+	if (IS_ERR(tcpci->port))
+		return PTR_ERR(tcpci->port);
+
+	return devm_request_threaded_irq(tcpci->dev, client->irq, NULL,
+					tcpci_irq,
+					IRQF_ONESHOT | IRQF_TRIGGER_LOW,
+					dev_name(tcpci->dev), tcpci);
+}
+
+static int tcpci_remove(struct i2c_client *client)
+{
+	struct tcpci *tcpci = i2c_get_clientdata(client);
+
+	tcpm_unregister_port(tcpci->port);
+
+	return 0;
+}
+
+static const struct i2c_device_id tcpci_id[] = {
+	{ "tcpci", 0 },
+	{ }
+};
+MODULE_DEVICE_TABLE(i2c, tcpci_id);
+
+#ifdef CONFIG_OF
+static const struct of_device_id tcpci_of_match[] = {
+	{ .compatible = "usb,tcpci", },
+	{},
+};
+MODULE_DEVICE_TABLE(of, tcpci_of_match);
+#endif
+
+static struct i2c_driver tcpci_i2c_driver = {
+	.driver = {
+		.name = "tcpci",
+		.of_match_table = of_match_ptr(tcpci_of_match),
+	},
+	.probe = tcpci_probe,
+	.remove = tcpci_remove,
+	.id_table = tcpci_id,
+};
+module_i2c_driver(tcpci_i2c_driver);
+
+MODULE_DESCRIPTION("USB Type-C Port Controller Interface driver");
+MODULE_LICENSE("GPL");
diff --git a/drivers/usb/typec/tcpci.h b/drivers/usb/typec/tcpci.h
new file mode 100644
index 0000000..10b04c8
--- /dev/null
+++ b/drivers/usb/typec/tcpci.h
@@ -0,0 +1,133 @@
+/*
+ * Copyright 2015-2017 Google, Inc
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * USB Type-C Port Controller Interface.
+ */
+
+#ifndef __LINUX_USB_TCPCI_H
+#define __LINUX_USB_TCPCI_H
+
+#define TCPC_VENDOR_ID			0x0
+#define TCPC_PRODUCT_ID			0x2
+#define TCPC_BCD_DEV			0x4
+#define TCPC_TC_REV			0x6
+#define TCPC_PD_REV			0x8
+#define TCPC_PD_INT_REV			0xa
+
+#define TCPC_ALERT			0x10
+#define TCPC_ALERT_VBUS_DISCNCT		BIT(11)
+#define TCPC_ALERT_RX_BUF_OVF		BIT(10)
+#define TCPC_ALERT_FAULT		BIT(9)
+#define TCPC_ALERT_V_ALARM_LO		BIT(8)
+#define TCPC_ALERT_V_ALARM_HI		BIT(7)
+#define TCPC_ALERT_TX_SUCCESS		BIT(6)
+#define TCPC_ALERT_TX_DISCARDED		BIT(5)
+#define TCPC_ALERT_TX_FAILED		BIT(4)
+#define TCPC_ALERT_RX_HARD_RST		BIT(3)
+#define TCPC_ALERT_RX_STATUS		BIT(2)
+#define TCPC_ALERT_POWER_STATUS		BIT(1)
+#define TCPC_ALERT_CC_STATUS		BIT(0)
+
+#define TCPC_ALERT_MASK			0x12
+#define TCPC_POWER_STATUS_MASK		0x14
+#define TCPC_FAULT_STATUS_MASK		0x15
+#define TCPC_CONFIG_STD_OUTPUT		0x18
+
+#define TCPC_TCPC_CTRL			0x19
+#define TCPC_TCPC_CTRL_ORIENTATION	BIT(0)
+
+#define TCPC_ROLE_CTRL			0x1a
+#define TCPC_ROLE_CTRL_DRP		BIT(6)
+#define TCPC_ROLE_CTRL_RP_VAL_SHIFT	4
+#define TCPC_ROLE_CTRL_RP_VAL_MASK	0x3
+#define TCPC_ROLE_CTRL_RP_VAL_DEF	0x0
+#define TCPC_ROLE_CTRL_RP_VAL_1_5	0x1
+#define TCPC_ROLE_CTRL_RP_VAL_3_0	0x2
+#define TCPC_ROLE_CTRL_CC2_SHIFT	2
+#define TCPC_ROLE_CTRL_CC2_MASK		0x3
+#define TCPC_ROLE_CTRL_CC1_SHIFT	0
+#define TCPC_ROLE_CTRL_CC1_MASK		0x3
+#define TCPC_ROLE_CTRL_CC_RA		0x0
+#define TCPC_ROLE_CTRL_CC_RP		0x1
+#define TCPC_ROLE_CTRL_CC_RD		0x2
+#define TCPC_ROLE_CTRL_CC_OPEN		0x3
+
+#define TCPC_FAULT_CTRL			0x1b
+
+#define TCPC_POWER_CTRL			0x1c
+#define TCPC_POWER_CTRL_VCONN_ENABLE	BIT(0)
+
+#define TCPC_CC_STATUS			0x1d
+#define TCPC_CC_STATUS_TERM		BIT(4)
+#define TCPC_CC_STATUS_CC2_SHIFT	2
+#define TCPC_CC_STATUS_CC2_MASK		0x3
+#define TCPC_CC_STATUS_CC1_SHIFT	0
+#define TCPC_CC_STATUS_CC1_MASK		0x3
+
+#define TCPC_POWER_STATUS		0x1e
+#define TCPC_POWER_STATUS_UNINIT	BIT(6)
+#define TCPC_POWER_STATUS_VBUS_DET	BIT(3)
+#define TCPC_POWER_STATUS_VBUS_PRES	BIT(2)
+
+#define TCPC_FAULT_STATUS		0x1f
+
+#define TCPC_COMMAND			0x23
+#define TCPC_CMD_WAKE_I2C		0x11
+#define TCPC_CMD_DISABLE_VBUS_DETECT	0x22
+#define TCPC_CMD_ENABLE_VBUS_DETECT	0x33
+#define TCPC_CMD_DISABLE_SINK_VBUS	0x44
+#define TCPC_CMD_SINK_VBUS		0x55
+#define TCPC_CMD_DISABLE_SRC_VBUS	0x66
+#define TCPC_CMD_SRC_VBUS_DEFAULT	0x77
+#define TCPC_CMD_SRC_VBUS_HIGH		0x88
+#define TCPC_CMD_LOOK4CONNECTION	0x99
+#define TCPC_CMD_RXONEMORE		0xAA
+#define TCPC_CMD_I2C_IDLE		0xFF
+
+#define TCPC_DEV_CAP_1			0x24
+#define TCPC_DEV_CAP_2			0x26
+#define TCPC_STD_INPUT_CAP		0x28
+#define TCPC_STD_OUTPUT_CAP		0x29
+
+#define TCPC_MSG_HDR_INFO		0x2e
+#define TCPC_MSG_HDR_INFO_DATA_ROLE	BIT(3)
+#define TCPC_MSG_HDR_INFO_PWR_ROLE	BIT(0)
+#define TCPC_MSG_HDR_INFO_REV_SHIFT	1
+#define TCPC_MSG_HDR_INFO_REV_MASK	0x3
+
+#define TCPC_RX_DETECT			0x2f
+#define TCPC_RX_DETECT_HARD_RESET	BIT(5)
+#define TCPC_RX_DETECT_SOP		BIT(0)
+
+#define TCPC_RX_BYTE_CNT		0x30
+#define TCPC_RX_BUF_FRAME_TYPE		0x31
+#define TCPC_RX_HDR			0x32
+#define TCPC_RX_DATA			0x34 /* through 0x4f */
+
+#define TCPC_TRANSMIT			0x50
+#define TCPC_TRANSMIT_RETRY_SHIFT	4
+#define TCPC_TRANSMIT_RETRY_MASK	0x3
+#define TCPC_TRANSMIT_TYPE_SHIFT	0
+#define TCPC_TRANSMIT_TYPE_MASK		0x7
+
+#define TCPC_TX_BYTE_CNT		0x51
+#define TCPC_TX_HDR			0x52
+#define TCPC_TX_DATA			0x54 /* through 0x6f */
+
+#define TCPC_VBUS_VOLTAGE			0x70
+#define TCPC_VBUS_SINK_DISCONNECT_THRESH	0x72
+#define TCPC_VBUS_STOP_DISCHARGE_THRESH		0x74
+#define TCPC_VBUS_VOLTAGE_ALARM_HI_CFG		0x76
+#define TCPC_VBUS_VOLTAGE_ALARM_LO_CFG		0x78
+
+#endif /* __LINUX_USB_TCPCI_H */
-- 
2.6.6

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