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|
// SPDX-License-Identifier: GPL-2.0
/*
* Driver for Intel PMC USB mux control
*
* Copyright (C) 2020 Intel Corporation
* Author: Heikki Krogerus <heikki.krogerus@linux.intel.com>
*/
#include <linux/acpi.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/property.h>
#include <linux/usb/pd.h>
#include <linux/usb/role.h>
#include <linux/usb/typec_mux.h>
#include <linux/usb/typec_dp.h>
#include <linux/usb/typec_tbt.h>
#include <asm/intel_scu_ipc.h>
#define PMC_USBC_CMD 0xa7
/* Response status bits */
#define PMC_USB_RESP_STATUS_FAILURE BIT(0)
#define PMC_USB_RESP_STATUS_FATAL BIT(1)
/* "Usage" OOB Message field values */
enum {
PMC_USB_CONNECT,
PMC_USB_DISCONNECT,
PMC_USB_SAFE_MODE,
PMC_USB_ALT_MODE,
PMC_USB_DP_HPD,
};
#define PMC_USB_MSG_USB2_PORT_SHIFT 0
#define PMC_USB_MSG_USB3_PORT_SHIFT 4
#define PMC_USB_MSG_UFP_SHIFT 4
#define PMC_USB_MSG_ORI_HSL_SHIFT 5
#define PMC_USB_MSG_ORI_AUX_SHIFT 6
/* Alt Mode Request */
struct altmode_req {
u8 usage;
u8 mode_type;
u8 mode_id;
u8 reserved;
u32 mode_data;
} __packed;
#define PMC_USB_MODE_TYPE_SHIFT 4
enum {
PMC_USB_MODE_TYPE_USB,
PMC_USB_MODE_TYPE_DP,
PMC_USB_MODE_TYPE_TBT,
};
/* Common Mode Data bits */
#define PMC_USB_ALTMODE_ACTIVE_CABLE BIT(2)
#define PMC_USB_ALTMODE_ORI_SHIFT 1
#define PMC_USB_ALTMODE_UFP_SHIFT 3
/* DP specific Mode Data bits */
#define PMC_USB_ALTMODE_DP_MODE_SHIFT 8
/* TBT specific Mode Data bits */
#define PMC_USB_ALTMODE_TBT_TYPE BIT(17)
#define PMC_USB_ALTMODE_CABLE_TYPE BIT(18)
#define PMC_USB_ALTMODE_ACTIVE_LINK BIT(20)
#define PMC_USB_ALTMODE_FORCE_LSR BIT(23)
#define PMC_USB_ALTMODE_CABLE_SPD(_s_) (((_s_) & GENMASK(2, 0)) << 25)
#define PMC_USB_ALTMODE_CABLE_USB31 1
#define PMC_USB_ALTMODE_CABLE_10GPS 2
#define PMC_USB_ALTMODE_CABLE_20GPS 3
#define PMC_USB_ALTMODE_TBT_GEN(_g_) (((_g_) & GENMASK(1, 0)) << 28)
/* Display HPD Request bits */
#define PMC_USB_DP_HPD_LVL BIT(4)
#define PMC_USB_DP_HPD_IRQ BIT(5)
/*
* Input Output Manager (IOM) PORT STATUS
*/
#define IOM_PORT_STATUS_ACTIVITY_TYPE_MASK GENMASK(9, 6)
#define IOM_PORT_STATUS_ACTIVITY_TYPE_SHIFT 6
#define IOM_PORT_STATUS_ACTIVITY_TYPE_USB 0x03
/* activity type: Safe Mode */
#define IOM_PORT_STATUS_ACTIVITY_TYPE_SAFE_MODE 0x04
/* activity type: Display Port */
#define IOM_PORT_STATUS_ACTIVITY_TYPE_DP 0x05
/* activity type: Display Port Multi Function Device */
#define IOM_PORT_STATUS_ACTIVITY_TYPE_DP_MFD 0x06
/* activity type: Thunderbolt */
#define IOM_PORT_STATUS_ACTIVITY_TYPE_TBT 0x07
#define IOM_PORT_STATUS_ACTIVITY_TYPE_ALT_MODE_USB 0x0c
#define IOM_PORT_STATUS_ACTIVITY_TYPE_ALT_MODE_TBT_USB 0x0d
/* Upstream Facing Port Information */
#define IOM_PORT_STATUS_UFP BIT(10)
/* Display Port Hot Plug Detect status */
#define IOM_PORT_STATUS_DHPD_HPD_STATUS_MASK GENMASK(13, 12)
#define IOM_PORT_STATUS_DHPD_HPD_STATUS_SHIFT 12
#define IOM_PORT_STATUS_DHPD_HPD_STATUS_ASSERT 0x01
#define IOM_PORT_STATUS_DHPD_HPD_SOURCE_TBT BIT(14)
#define IOM_PORT_STATUS_CONNECTED BIT(31)
#define IOM_PORT_ACTIVITY_IS(_status_, _type_) \
((((_status_) & IOM_PORT_STATUS_ACTIVITY_TYPE_MASK) >> \
IOM_PORT_STATUS_ACTIVITY_TYPE_SHIFT) == \
(IOM_PORT_STATUS_ACTIVITY_TYPE_##_type_))
#define IOM_PORT_HPD_ASSERTED(_status_) \
((((_status_) & IOM_PORT_STATUS_DHPD_HPD_STATUS_MASK) >> \
IOM_PORT_STATUS_DHPD_HPD_STATUS_SHIFT) & \
IOM_PORT_STATUS_DHPD_HPD_STATUS_ASSERT)
struct pmc_usb;
struct pmc_usb_port {
int num;
u32 iom_status;
struct pmc_usb *pmc;
struct typec_mux *typec_mux;
struct typec_switch *typec_sw;
struct usb_role_switch *usb_sw;
enum typec_orientation orientation;
enum usb_role role;
u8 usb2_port;
u8 usb3_port;
enum typec_orientation sbu_orientation;
enum typec_orientation hsl_orientation;
};
struct pmc_usb {
u8 num_ports;
struct device *dev;
struct intel_scu_ipc_dev *ipc;
struct pmc_usb_port *port;
struct acpi_device *iom_adev;
void __iomem *iom_base;
u32 iom_port_status_offset;
};
static void update_port_status(struct pmc_usb_port *port)
{
u8 port_num;
/* SoC expects the USB Type-C port numbers to start with 0 */
port_num = port->usb3_port - 1;
port->iom_status = readl(port->pmc->iom_base +
port->pmc->iom_port_status_offset +
port_num * sizeof(u32));
}
static int sbu_orientation(struct pmc_usb_port *port)
{
if (port->sbu_orientation)
return port->sbu_orientation - 1;
return port->orientation - 1;
}
static int hsl_orientation(struct pmc_usb_port *port)
{
if (port->hsl_orientation)
return port->hsl_orientation - 1;
return port->orientation - 1;
}
static int pmc_usb_command(struct pmc_usb_port *port, u8 *msg, u32 len)
{
u8 response[4];
int ret;
/*
* Error bit will always be 0 with the USBC command.
* Status can be checked from the response message if the
* function intel_scu_ipc_dev_command succeeds.
*/
ret = intel_scu_ipc_dev_command(port->pmc->ipc, PMC_USBC_CMD, 0, msg,
len, response, sizeof(response));
if (ret)
return ret;
if (response[2] & PMC_USB_RESP_STATUS_FAILURE) {
if (response[2] & PMC_USB_RESP_STATUS_FATAL)
return -EIO;
return -EBUSY;
}
return 0;
}
static int
pmc_usb_mux_dp_hpd(struct pmc_usb_port *port, struct typec_displayport_data *dp)
{
u8 msg[2] = { };
int ret;
msg[0] = PMC_USB_DP_HPD;
msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT;
/* Configure HPD first if HPD,IRQ comes together */
if (!IOM_PORT_HPD_ASSERTED(port->iom_status) &&
dp->status & DP_STATUS_IRQ_HPD &&
dp->status & DP_STATUS_HPD_STATE) {
msg[1] = PMC_USB_DP_HPD_LVL;
ret = pmc_usb_command(port, msg, sizeof(msg));
if (ret)
return ret;
}
if (dp->status & DP_STATUS_IRQ_HPD)
msg[1] = PMC_USB_DP_HPD_IRQ;
if (dp->status & DP_STATUS_HPD_STATE)
msg[1] |= PMC_USB_DP_HPD_LVL;
return pmc_usb_command(port, msg, sizeof(msg));
}
static int
pmc_usb_mux_dp(struct pmc_usb_port *port, struct typec_mux_state *state)
{
struct typec_displayport_data *data = state->data;
struct altmode_req req = { };
int ret;
if (IOM_PORT_ACTIVITY_IS(port->iom_status, DP) ||
IOM_PORT_ACTIVITY_IS(port->iom_status, DP_MFD)) {
if (IOM_PORT_HPD_ASSERTED(port->iom_status) &&
(!(data->status & DP_STATUS_IRQ_HPD) &&
data->status & DP_STATUS_HPD_STATE))
return 0;
return pmc_usb_mux_dp_hpd(port, state->data);
}
req.usage = PMC_USB_ALT_MODE;
req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT;
req.mode_type = PMC_USB_MODE_TYPE_DP << PMC_USB_MODE_TYPE_SHIFT;
req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT;
req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT;
req.mode_data |= (state->mode - TYPEC_STATE_MODAL) <<
PMC_USB_ALTMODE_DP_MODE_SHIFT;
ret = pmc_usb_command(port, (void *)&req, sizeof(req));
if (ret)
return ret;
if (data->status & (DP_STATUS_IRQ_HPD | DP_STATUS_HPD_STATE))
return pmc_usb_mux_dp_hpd(port, state->data);
return 0;
}
static int
pmc_usb_mux_tbt(struct pmc_usb_port *port, struct typec_mux_state *state)
{
struct typec_thunderbolt_data *data = state->data;
u8 cable_speed = TBT_CABLE_SPEED(data->cable_mode);
struct altmode_req req = { };
if (IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) ||
IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB))
return 0;
req.usage = PMC_USB_ALT_MODE;
req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT;
req.mode_type = PMC_USB_MODE_TYPE_TBT << PMC_USB_MODE_TYPE_SHIFT;
req.mode_data = (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT;
req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT;
if (TBT_ADAPTER(data->device_mode) == TBT_ADAPTER_TBT3)
req.mode_data |= PMC_USB_ALTMODE_TBT_TYPE;
if (data->cable_mode & TBT_CABLE_OPTICAL)
req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE;
if (data->cable_mode & TBT_CABLE_LINK_TRAINING)
req.mode_data |= PMC_USB_ALTMODE_ACTIVE_LINK;
if (data->enter_vdo & TBT_ENTER_MODE_ACTIVE_CABLE)
req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE;
req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed);
return pmc_usb_command(port, (void *)&req, sizeof(req));
}
static int
pmc_usb_mux_usb4(struct pmc_usb_port *port, struct typec_mux_state *state)
{
struct enter_usb_data *data = state->data;
struct altmode_req req = { };
u8 cable_speed;
if (IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) ||
IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB))
return 0;
req.usage = PMC_USB_ALT_MODE;
req.usage |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT;
req.mode_type = PMC_USB_MODE_TYPE_TBT << PMC_USB_MODE_TYPE_SHIFT;
/* USB4 Mode */
req.mode_data = PMC_USB_ALTMODE_FORCE_LSR;
if (data->active_link_training)
req.mode_data |= PMC_USB_ALTMODE_ACTIVE_LINK;
req.mode_data |= (port->orientation - 1) << PMC_USB_ALTMODE_ORI_SHIFT;
req.mode_data |= (port->role - 1) << PMC_USB_ALTMODE_UFP_SHIFT;
switch ((data->eudo & EUDO_CABLE_TYPE_MASK) >> EUDO_CABLE_TYPE_SHIFT) {
case EUDO_CABLE_TYPE_PASSIVE:
break;
case EUDO_CABLE_TYPE_OPTICAL:
req.mode_data |= PMC_USB_ALTMODE_CABLE_TYPE;
fallthrough;
default:
req.mode_data |= PMC_USB_ALTMODE_ACTIVE_CABLE;
break;
}
cable_speed = (data->eudo & EUDO_CABLE_SPEED_MASK) >> EUDO_CABLE_SPEED_SHIFT;
req.mode_data |= PMC_USB_ALTMODE_CABLE_SPD(cable_speed);
return pmc_usb_command(port, (void *)&req, sizeof(req));
}
static int pmc_usb_mux_safe_state(struct pmc_usb_port *port,
struct typec_mux_state *state)
{
u8 msg;
if (IOM_PORT_ACTIVITY_IS(port->iom_status, SAFE_MODE))
return 0;
if ((IOM_PORT_ACTIVITY_IS(port->iom_status, DP) ||
IOM_PORT_ACTIVITY_IS(port->iom_status, DP_MFD)) &&
state->alt && state->alt->svid == USB_TYPEC_DP_SID)
return 0;
if ((IOM_PORT_ACTIVITY_IS(port->iom_status, TBT) ||
IOM_PORT_ACTIVITY_IS(port->iom_status, ALT_MODE_TBT_USB)) &&
state->alt && state->alt->svid == USB_TYPEC_TBT_SID)
return 0;
msg = PMC_USB_SAFE_MODE;
msg |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT;
return pmc_usb_command(port, &msg, sizeof(msg));
}
static int pmc_usb_disconnect(struct pmc_usb_port *port)
{
struct typec_displayport_data data = { };
u8 msg[2];
if (!(port->iom_status & IOM_PORT_STATUS_CONNECTED))
return 0;
/* Clear DisplayPort HPD if it's still asserted. */
if (IOM_PORT_HPD_ASSERTED(port->iom_status))
pmc_usb_mux_dp_hpd(port, &data);
msg[0] = PMC_USB_DISCONNECT;
msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT;
msg[1] = port->usb2_port << PMC_USB_MSG_USB2_PORT_SHIFT;
return pmc_usb_command(port, msg, sizeof(msg));
}
static int pmc_usb_connect(struct pmc_usb_port *port, enum usb_role role)
{
u8 ufp = role == USB_ROLE_DEVICE ? 1 : 0;
u8 msg[2];
int ret;
if (port->orientation == TYPEC_ORIENTATION_NONE)
return -EINVAL;
if (port->iom_status & IOM_PORT_STATUS_CONNECTED) {
if (port->role == role || port->role == USB_ROLE_NONE)
return 0;
/* Role swap */
ret = pmc_usb_disconnect(port);
if (ret)
return ret;
}
msg[0] = PMC_USB_CONNECT;
msg[0] |= port->usb3_port << PMC_USB_MSG_USB3_PORT_SHIFT;
msg[1] = port->usb2_port << PMC_USB_MSG_USB2_PORT_SHIFT;
msg[1] |= ufp << PMC_USB_MSG_UFP_SHIFT;
msg[1] |= hsl_orientation(port) << PMC_USB_MSG_ORI_HSL_SHIFT;
msg[1] |= sbu_orientation(port) << PMC_USB_MSG_ORI_AUX_SHIFT;
return pmc_usb_command(port, msg, sizeof(msg));
}
static int
pmc_usb_mux_set(struct typec_mux *mux, struct typec_mux_state *state)
{
struct pmc_usb_port *port = typec_mux_get_drvdata(mux);
update_port_status(port);
if (port->orientation == TYPEC_ORIENTATION_NONE || port->role == USB_ROLE_NONE)
return 0;
if (state->mode == TYPEC_STATE_SAFE)
return pmc_usb_mux_safe_state(port, state);
if (state->mode == TYPEC_STATE_USB)
return pmc_usb_connect(port, port->role);
if (state->alt) {
switch (state->alt->svid) {
case USB_TYPEC_TBT_SID:
return pmc_usb_mux_tbt(port, state);
case USB_TYPEC_DP_SID:
return pmc_usb_mux_dp(port, state);
}
} else {
switch (state->mode) {
case TYPEC_MODE_USB2:
/* REVISIT: Try with usb3_port set to 0? */
break;
case TYPEC_MODE_USB3:
return pmc_usb_connect(port, port->role);
case TYPEC_MODE_USB4:
return pmc_usb_mux_usb4(port, state);
}
}
return -EOPNOTSUPP;
}
static int pmc_usb_set_orientation(struct typec_switch *sw,
enum typec_orientation orientation)
{
struct pmc_usb_port *port = typec_switch_get_drvdata(sw);
update_port_status(port);
port->orientation = orientation;
return 0;
}
static int pmc_usb_set_role(struct usb_role_switch *sw, enum usb_role role)
{
struct pmc_usb_port *port = usb_role_switch_get_drvdata(sw);
int ret;
update_port_status(port);
if (role == USB_ROLE_NONE)
ret = pmc_usb_disconnect(port);
else
ret = pmc_usb_connect(port, role);
port->role = role;
return ret;
}
static int pmc_usb_register_port(struct pmc_usb *pmc, int index,
struct fwnode_handle *fwnode)
{
struct pmc_usb_port *port = &pmc->port[index];
struct usb_role_switch_desc desc = { };
struct typec_switch_desc sw_desc = { };
struct typec_mux_desc mux_desc = { };
const char *str;
int ret;
ret = fwnode_property_read_u8(fwnode, "usb2-port-number", &port->usb2_port);
if (ret)
return ret;
ret = fwnode_property_read_u8(fwnode, "usb3-port-number", &port->usb3_port);
if (ret)
return ret;
ret = fwnode_property_read_string(fwnode, "sbu-orientation", &str);
if (!ret)
port->sbu_orientation = typec_find_orientation(str);
ret = fwnode_property_read_string(fwnode, "hsl-orientation", &str);
if (!ret)
port->hsl_orientation = typec_find_orientation(str);
port->num = index;
port->pmc = pmc;
sw_desc.fwnode = fwnode;
sw_desc.drvdata = port;
sw_desc.name = fwnode_get_name(fwnode);
sw_desc.set = pmc_usb_set_orientation;
port->typec_sw = typec_switch_register(pmc->dev, &sw_desc);
if (IS_ERR(port->typec_sw))
return PTR_ERR(port->typec_sw);
mux_desc.fwnode = fwnode;
mux_desc.drvdata = port;
mux_desc.name = fwnode_get_name(fwnode);
mux_desc.set = pmc_usb_mux_set;
port->typec_mux = typec_mux_register(pmc->dev, &mux_desc);
if (IS_ERR(port->typec_mux)) {
ret = PTR_ERR(port->typec_mux);
goto err_unregister_switch;
}
desc.fwnode = fwnode;
desc.driver_data = port;
desc.name = fwnode_get_name(fwnode);
desc.set = pmc_usb_set_role;
port->usb_sw = usb_role_switch_register(pmc->dev, &desc);
if (IS_ERR(port->usb_sw)) {
ret = PTR_ERR(port->usb_sw);
goto err_unregister_mux;
}
return 0;
err_unregister_mux:
typec_mux_unregister(port->typec_mux);
err_unregister_switch:
typec_switch_unregister(port->typec_sw);
return ret;
}
static int is_memory(struct acpi_resource *res, void *data)
{
struct resource_win win = {};
struct resource *r = &win.res;
return !(acpi_dev_resource_memory(res, r) ||
acpi_dev_resource_address_space(res, &win));
}
/* IOM ACPI IDs and IOM_PORT_STATUS_OFFSET */
static const struct acpi_device_id iom_acpi_ids[] = {
/* TigerLake */
{ "INTC1072", 0x560, },
/* AlderLake */
{ "INTC1079", 0x160, },
/* Meteor Lake */
{ "INTC107A", 0x160, },
{}
};
static int pmc_usb_probe_iom(struct pmc_usb *pmc)
{
struct list_head resource_list;
struct resource_entry *rentry;
static const struct acpi_device_id *dev_id;
struct acpi_device *adev = NULL;
int ret;
for (dev_id = &iom_acpi_ids[0]; dev_id->id[0]; dev_id++) {
if (acpi_dev_present(dev_id->id, NULL, -1)) {
pmc->iom_port_status_offset = (u32)dev_id->driver_data;
adev = acpi_dev_get_first_match_dev(dev_id->id, NULL, -1);
break;
}
}
if (!adev)
return -ENODEV;
INIT_LIST_HEAD(&resource_list);
ret = acpi_dev_get_resources(adev, &resource_list, is_memory, NULL);
if (ret < 0)
return ret;
rentry = list_first_entry_or_null(&resource_list, struct resource_entry, node);
if (rentry)
pmc->iom_base = devm_ioremap_resource(pmc->dev, rentry->res);
acpi_dev_free_resource_list(&resource_list);
if (!pmc->iom_base) {
put_device(&adev->dev);
return -ENOMEM;
}
if (IS_ERR(pmc->iom_base)) {
put_device(&adev->dev);
return PTR_ERR(pmc->iom_base);
}
pmc->iom_adev = adev;
return 0;
}
static int pmc_usb_probe(struct platform_device *pdev)
{
struct fwnode_handle *fwnode = NULL;
struct pmc_usb *pmc;
int i = 0;
int ret;
pmc = devm_kzalloc(&pdev->dev, sizeof(*pmc), GFP_KERNEL);
if (!pmc)
return -ENOMEM;
device_for_each_child_node(&pdev->dev, fwnode)
pmc->num_ports++;
/* The IOM microcontroller has a limitation of max 4 ports. */
if (pmc->num_ports > 4) {
dev_err(&pdev->dev, "driver limited to 4 ports\n");
return -ERANGE;
}
pmc->port = devm_kcalloc(&pdev->dev, pmc->num_ports,
sizeof(struct pmc_usb_port), GFP_KERNEL);
if (!pmc->port)
return -ENOMEM;
pmc->ipc = devm_intel_scu_ipc_dev_get(&pdev->dev);
if (!pmc->ipc)
return -ENODEV;
pmc->dev = &pdev->dev;
ret = pmc_usb_probe_iom(pmc);
if (ret)
return ret;
/*
* For every physical USB connector (USB2 and USB3 combo) there is a
* child ACPI device node under the PMC mux ACPI device object.
*/
for (i = 0; i < pmc->num_ports; i++) {
fwnode = device_get_next_child_node(pmc->dev, fwnode);
if (!fwnode)
break;
ret = pmc_usb_register_port(pmc, i, fwnode);
if (ret) {
fwnode_handle_put(fwnode);
goto err_remove_ports;
}
}
platform_set_drvdata(pdev, pmc);
return 0;
err_remove_ports:
for (i = 0; i < pmc->num_ports; i++) {
typec_switch_unregister(pmc->port[i].typec_sw);
typec_mux_unregister(pmc->port[i].typec_mux);
usb_role_switch_unregister(pmc->port[i].usb_sw);
}
put_device(&pmc->iom_adev->dev);
return ret;
}
static int pmc_usb_remove(struct platform_device *pdev)
{
struct pmc_usb *pmc = platform_get_drvdata(pdev);
int i;
for (i = 0; i < pmc->num_ports; i++) {
typec_switch_unregister(pmc->port[i].typec_sw);
typec_mux_unregister(pmc->port[i].typec_mux);
usb_role_switch_unregister(pmc->port[i].usb_sw);
}
put_device(&pmc->iom_adev->dev);
return 0;
}
static const struct acpi_device_id pmc_usb_acpi_ids[] = {
{ "INTC105C", },
{ }
};
MODULE_DEVICE_TABLE(acpi, pmc_usb_acpi_ids);
static struct platform_driver pmc_usb_driver = {
.driver = {
.name = "intel_pmc_usb",
.acpi_match_table = ACPI_PTR(pmc_usb_acpi_ids),
},
.probe = pmc_usb_probe,
.remove = pmc_usb_remove,
};
module_platform_driver(pmc_usb_driver);
MODULE_AUTHOR("Heikki Krogerus <heikki.krogerus@linux.intel.com>");
MODULE_LICENSE("GPL v2");
MODULE_DESCRIPTION("Intel PMC USB mux control");
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