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linux-next/drivers/usb/misc/usb251xb.c
Richard Leitner 7f7d8ba3b2 usb: usb251xb: dt: add unit suffix to oc-delay and power-on-time 
Rename oc-delay-* to oc-delay-us and make it expect a time value.
Furthermore add -ms suffix to power-on-time. There changes were
suggested by Rob Herring in https://lkml.org/lkml/2017/2/15/1283.

Signed-off-by: Richard Leitner <richard.leitner@skidata.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-03-09 10:34:16 +01:00

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/*
* Driver for Microchip USB251xB USB 2.0 Hi-Speed Hub Controller
* Configuration via SMBus.
*
* Copyright (c) 2017 SKIDATA AG
*
* This work is based on the USB3503 driver by Dongjin Kim and
* a not-accepted patch by Fabien Lahoudere, see:
* https://patchwork.kernel.org/patch/9257715/
*
* 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.
*/
#include <linux/delay.h>
#include <linux/gpio.h>
#include <linux/i2c.h>
#include <linux/module.h>
#include <linux/nls.h>
#include <linux/of_device.h>
#include <linux/of_gpio.h>
#include <linux/slab.h>
/* Internal Register Set Addresses & Default Values acc. to DS00001692C */
#define USB251XB_ADDR_VENDOR_ID_LSB 0x00
#define USB251XB_ADDR_VENDOR_ID_MSB 0x01
#define USB251XB_DEF_VENDOR_ID 0x0424
#define USB251XB_ADDR_PRODUCT_ID_LSB 0x02
#define USB251XB_ADDR_PRODUCT_ID_MSB 0x03
#define USB251XB_DEF_PRODUCT_ID_12 0x2512 /* USB2512B/12Bi */
#define USB251XB_DEF_PRODUCT_ID_13 0x2513 /* USB2513B/13Bi */
#define USB251XB_DEF_PRODUCT_ID_14 0x2514 /* USB2514B/14Bi */
#define USB251XB_ADDR_DEVICE_ID_LSB 0x04
#define USB251XB_ADDR_DEVICE_ID_MSB 0x05
#define USB251XB_DEF_DEVICE_ID 0x0BB3
#define USB251XB_ADDR_CONFIG_DATA_1 0x06
#define USB251XB_DEF_CONFIG_DATA_1 0x9B
#define USB251XB_ADDR_CONFIG_DATA_2 0x07
#define USB251XB_DEF_CONFIG_DATA_2 0x20
#define USB251XB_ADDR_CONFIG_DATA_3 0x08
#define USB251XB_DEF_CONFIG_DATA_3 0x02
#define USB251XB_ADDR_NON_REMOVABLE_DEVICES 0x09
#define USB251XB_DEF_NON_REMOVABLE_DEVICES 0x00
#define USB251XB_ADDR_PORT_DISABLE_SELF 0x0A
#define USB251XB_DEF_PORT_DISABLE_SELF 0x00
#define USB251XB_ADDR_PORT_DISABLE_BUS 0x0B
#define USB251XB_DEF_PORT_DISABLE_BUS 0x00
#define USB251XB_ADDR_MAX_POWER_SELF 0x0C
#define USB251XB_DEF_MAX_POWER_SELF 0x01
#define USB251XB_ADDR_MAX_POWER_BUS 0x0D
#define USB251XB_DEF_MAX_POWER_BUS 0x32
#define USB251XB_ADDR_MAX_CURRENT_SELF 0x0E
#define USB251XB_DEF_MAX_CURRENT_SELF 0x01
#define USB251XB_ADDR_MAX_CURRENT_BUS 0x0F
#define USB251XB_DEF_MAX_CURRENT_BUS 0x32
#define USB251XB_ADDR_POWER_ON_TIME 0x10
#define USB251XB_DEF_POWER_ON_TIME 0x32
#define USB251XB_ADDR_LANGUAGE_ID_HIGH 0x11
#define USB251XB_ADDR_LANGUAGE_ID_LOW 0x12
#define USB251XB_DEF_LANGUAGE_ID 0x0000
#define USB251XB_STRING_BUFSIZE 62
#define USB251XB_ADDR_MANUFACTURER_STRING_LEN 0x13
#define USB251XB_ADDR_MANUFACTURER_STRING 0x16
#define USB251XB_DEF_MANUFACTURER_STRING "Microchip"
#define USB251XB_ADDR_PRODUCT_STRING_LEN 0x14
#define USB251XB_ADDR_PRODUCT_STRING 0x54
#define USB251XB_DEF_PRODUCT_STRING "USB251xB/xBi"
#define USB251XB_ADDR_SERIAL_STRING_LEN 0x15
#define USB251XB_ADDR_SERIAL_STRING 0x92
#define USB251XB_DEF_SERIAL_STRING ""
#define USB251XB_ADDR_BATTERY_CHARGING_ENABLE 0xD0
#define USB251XB_DEF_BATTERY_CHARGING_ENABLE 0x00
#define USB251XB_ADDR_BOOST_UP 0xF6
#define USB251XB_DEF_BOOST_UP 0x00
#define USB251XB_ADDR_BOOST_X 0xF8
#define USB251XB_DEF_BOOST_X 0x00
#define USB251XB_ADDR_PORT_SWAP 0xFA
#define USB251XB_DEF_PORT_SWAP 0x00
#define USB251XB_ADDR_PORT_MAP_12 0xFB
#define USB251XB_DEF_PORT_MAP_12 0x00
#define USB251XB_ADDR_PORT_MAP_34 0xFC
#define USB251XB_DEF_PORT_MAP_34 0x00 /* USB2513B/i & USB2514B/i only */
#define USB251XB_ADDR_STATUS_COMMAND 0xFF
#define USB251XB_STATUS_COMMAND_SMBUS_DOWN 0x04
#define USB251XB_STATUS_COMMAND_RESET 0x02
#define USB251XB_STATUS_COMMAND_ATTACH 0x01
#define USB251XB_I2C_REG_SZ 0x100
#define USB251XB_I2C_WRITE_SZ 0x10
#define DRIVER_NAME "usb251xb"
#define DRIVER_DESC "Microchip USB 2.0 Hi-Speed Hub Controller"
#define DRIVER_VERSION "1.0"
struct usb251xb {
struct device *dev;
struct i2c_client *i2c;
u8 skip_config;
int gpio_reset;
u16 vendor_id;
u16 product_id;
u16 device_id;
u8 conf_data1;
u8 conf_data2;
u8 conf_data3;
u8 non_rem_dev;
u8 port_disable_sp;
u8 port_disable_bp;
u8 max_power_sp;
u8 max_power_bp;
u8 max_current_sp;
u8 max_current_bp;
u8 power_on_time;
u16 lang_id;
u8 manufacturer_len;
u8 product_len;
u8 serial_len;
char manufacturer[USB251XB_STRING_BUFSIZE];
char product[USB251XB_STRING_BUFSIZE];
char serial[USB251XB_STRING_BUFSIZE];
u8 bat_charge_en;
u8 boost_up;
u8 boost_x;
u8 port_swap;
u8 port_map12;
u8 port_map34;
u8 status;
};
struct usb251xb_data {
u16 product_id;
char product_str[USB251XB_STRING_BUFSIZE / 2]; /* ASCII string */
};
static const struct usb251xb_data usb2512b_data = {
.product_id = 0x2512,
.product_str = "USB2512B",
};
static const struct usb251xb_data usb2512bi_data = {
.product_id = 0x2512,
.product_str = "USB2512Bi",
};
static const struct usb251xb_data usb2513b_data = {
.product_id = 0x2513,
.product_str = "USB2513B",
};
static const struct usb251xb_data usb2513bi_data = {
.product_id = 0x2513,
.product_str = "USB2513Bi",
};
static const struct usb251xb_data usb2514b_data = {
.product_id = 0x2514,
.product_str = "USB2514B",
};
static const struct usb251xb_data usb2514bi_data = {
.product_id = 0x2514,
.product_str = "USB2514Bi",
};
static void usb251xb_reset(struct usb251xb *hub, int state)
{
if (!gpio_is_valid(hub->gpio_reset))
return;
gpio_set_value_cansleep(hub->gpio_reset, state);
/* wait for hub recovery/stabilization */
if (state)
usleep_range(500, 750); /* >=500us at power on */
else
usleep_range(1, 10); /* >=1us at power down */
}
static int usb251xb_connect(struct usb251xb *hub)
{
struct device *dev = hub->dev;
int err, i;
char i2c_wb[USB251XB_I2C_REG_SZ];
memset(i2c_wb, 0, USB251XB_I2C_REG_SZ);
if (hub->skip_config) {
dev_info(dev, "Skip hub configuration, only attach.\n");
i2c_wb[0] = 0x01;
i2c_wb[1] = USB251XB_STATUS_COMMAND_ATTACH;
usb251xb_reset(hub, 1);
err = i2c_smbus_write_i2c_block_data(hub->i2c,
USB251XB_ADDR_STATUS_COMMAND, 2, i2c_wb);
if (err) {
dev_err(dev, "attaching hub failed: %d\n", err);
return err;
}
return 0;
}
i2c_wb[USB251XB_ADDR_VENDOR_ID_MSB] = (hub->vendor_id >> 8) & 0xFF;
i2c_wb[USB251XB_ADDR_VENDOR_ID_LSB] = hub->vendor_id & 0xFF;
i2c_wb[USB251XB_ADDR_PRODUCT_ID_MSB] = (hub->product_id >> 8) & 0xFF;
i2c_wb[USB251XB_ADDR_PRODUCT_ID_LSB] = hub->product_id & 0xFF;
i2c_wb[USB251XB_ADDR_DEVICE_ID_MSB] = (hub->device_id >> 8) & 0xFF;
i2c_wb[USB251XB_ADDR_DEVICE_ID_LSB] = hub->device_id & 0xFF;
i2c_wb[USB251XB_ADDR_CONFIG_DATA_1] = hub->conf_data1;
i2c_wb[USB251XB_ADDR_CONFIG_DATA_2] = hub->conf_data2;
i2c_wb[USB251XB_ADDR_CONFIG_DATA_3] = hub->conf_data3;
i2c_wb[USB251XB_ADDR_NON_REMOVABLE_DEVICES] = hub->non_rem_dev;
i2c_wb[USB251XB_ADDR_PORT_DISABLE_SELF] = hub->port_disable_sp;
i2c_wb[USB251XB_ADDR_PORT_DISABLE_BUS] = hub->port_disable_bp;
i2c_wb[USB251XB_ADDR_MAX_POWER_SELF] = hub->max_power_sp;
i2c_wb[USB251XB_ADDR_MAX_POWER_BUS] = hub->max_power_bp;
i2c_wb[USB251XB_ADDR_MAX_CURRENT_SELF] = hub->max_current_sp;
i2c_wb[USB251XB_ADDR_MAX_CURRENT_BUS] = hub->max_current_bp;
i2c_wb[USB251XB_ADDR_POWER_ON_TIME] = hub->power_on_time;
i2c_wb[USB251XB_ADDR_LANGUAGE_ID_HIGH] = (hub->lang_id >> 8) & 0xFF;
i2c_wb[USB251XB_ADDR_LANGUAGE_ID_LOW] = hub->lang_id & 0xFF;
i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING_LEN] = hub->manufacturer_len;
i2c_wb[USB251XB_ADDR_PRODUCT_STRING_LEN] = hub->product_len;
i2c_wb[USB251XB_ADDR_SERIAL_STRING_LEN] = hub->serial_len;
memcpy(&i2c_wb[USB251XB_ADDR_MANUFACTURER_STRING], hub->manufacturer,
USB251XB_STRING_BUFSIZE);
memcpy(&i2c_wb[USB251XB_ADDR_SERIAL_STRING], hub->serial,
USB251XB_STRING_BUFSIZE);
memcpy(&i2c_wb[USB251XB_ADDR_PRODUCT_STRING], hub->product,
USB251XB_STRING_BUFSIZE);
i2c_wb[USB251XB_ADDR_BATTERY_CHARGING_ENABLE] = hub->bat_charge_en;
i2c_wb[USB251XB_ADDR_BOOST_UP] = hub->boost_up;
i2c_wb[USB251XB_ADDR_BOOST_X] = hub->boost_x;
i2c_wb[USB251XB_ADDR_PORT_SWAP] = hub->port_swap;
i2c_wb[USB251XB_ADDR_PORT_MAP_12] = hub->port_map12;
i2c_wb[USB251XB_ADDR_PORT_MAP_34] = hub->port_map34;
i2c_wb[USB251XB_ADDR_STATUS_COMMAND] = USB251XB_STATUS_COMMAND_ATTACH;
usb251xb_reset(hub, 1);
/* write registers */
for (i = 0; i < (USB251XB_I2C_REG_SZ / USB251XB_I2C_WRITE_SZ); i++) {
int offset = i * USB251XB_I2C_WRITE_SZ;
char wbuf[USB251XB_I2C_WRITE_SZ + 1];
/* The first data byte transferred tells the hub how many data
* bytes will follow (byte count).
*/
wbuf[0] = USB251XB_I2C_WRITE_SZ;
memcpy(&wbuf[1], &i2c_wb[offset], USB251XB_I2C_WRITE_SZ);
dev_dbg(dev, "writing %d byte block %d to 0x%02X\n",
USB251XB_I2C_WRITE_SZ, i, offset);
err = i2c_smbus_write_i2c_block_data(hub->i2c, offset,
USB251XB_I2C_WRITE_SZ + 1,
wbuf);
if (err)
goto out_err;
}
dev_info(dev, "Hub configuration was successful.\n");
return 0;
out_err:
dev_err(dev, "configuring block %d failed: %d\n", i, err);
return err;
}
#ifdef CONFIG_OF
static int usb251xb_get_ofdata(struct usb251xb *hub,
struct usb251xb_data *data)
{
struct device *dev = hub->dev;
struct device_node *np = dev->of_node;
int len, err, i;
u32 *property_u32 = NULL;
const u32 *cproperty_u32;
const char *cproperty_char;
char str[USB251XB_STRING_BUFSIZE / 2];
if (!np) {
dev_err(dev, "failed to get ofdata\n");
return -ENODEV;
}
if (of_get_property(np, "skip-config", NULL))
hub->skip_config = 1;
else
hub->skip_config = 0;
hub->gpio_reset = of_get_named_gpio(np, "reset-gpios", 0);
if (hub->gpio_reset == -EPROBE_DEFER)
return -EPROBE_DEFER;
if (gpio_is_valid(hub->gpio_reset)) {
err = devm_gpio_request_one(dev, hub->gpio_reset,
GPIOF_OUT_INIT_LOW,
"usb251xb reset");
if (err) {
dev_err(dev,
"unable to request GPIO %d as reset pin (%d)\n",
hub->gpio_reset, err);
return err;
}
}
if (of_property_read_u16_array(np, "vendor-id", &hub->vendor_id, 1))
hub->vendor_id = USB251XB_DEF_VENDOR_ID;
if (of_property_read_u16_array(np, "product-id",
&hub->product_id, 1))
hub->product_id = data->product_id;
if (of_property_read_u16_array(np, "device-id", &hub->device_id, 1))
hub->device_id = USB251XB_DEF_DEVICE_ID;
hub->conf_data1 = USB251XB_DEF_CONFIG_DATA_1;
if (of_get_property(np, "self-powered", NULL)) {
hub->conf_data1 |= BIT(7);
/* Configure Over-Current sens when self-powered */
hub->conf_data1 &= ~BIT(2);
if (of_get_property(np, "ganged-sensing", NULL))
hub->conf_data1 &= ~BIT(1);
else if (of_get_property(np, "individual-sensing", NULL))
hub->conf_data1 |= BIT(1);
} else if (of_get_property(np, "bus-powered", NULL)) {
hub->conf_data1 &= ~BIT(7);
/* Disable Over-Current sense when bus-powered */
hub->conf_data1 |= BIT(2);
}
if (of_get_property(np, "disable-hi-speed", NULL))
hub->conf_data1 |= BIT(5);
if (of_get_property(np, "multi-tt", NULL))
hub->conf_data1 |= BIT(4);
else if (of_get_property(np, "single-tt", NULL))
hub->conf_data1 &= ~BIT(4);
if (of_get_property(np, "disable-eop", NULL))
hub->conf_data1 |= BIT(3);
if (of_get_property(np, "individual-port-switching", NULL))
hub->conf_data1 |= BIT(0);
else if (of_get_property(np, "ganged-port-switching", NULL))
hub->conf_data1 &= ~BIT(0);
hub->conf_data2 = USB251XB_DEF_CONFIG_DATA_2;
if (of_get_property(np, "dynamic-power-switching", NULL))
hub->conf_data2 |= BIT(7);
if (!of_property_read_u32(np, "oc-delay-us", property_u32)) {
if (*property_u32 == 100) {
/* 100 us*/
hub->conf_data2 &= ~BIT(5);
hub->conf_data2 &= ~BIT(4);
} else if (*property_u32 == 4000) {
/* 4 ms */
hub->conf_data2 &= ~BIT(5);
hub->conf_data2 |= BIT(4);
} else if (*property_u32 == 16000) {
/* 16 ms */
hub->conf_data2 |= BIT(5);
hub->conf_data2 |= BIT(4);
} else {
/* 8 ms (DEFAULT) */
hub->conf_data2 |= BIT(5);
hub->conf_data2 &= ~BIT(4);
}
}
if (of_get_property(np, "compound-device", NULL))
hub->conf_data2 |= BIT(3);
hub->conf_data3 = USB251XB_DEF_CONFIG_DATA_3;
if (of_get_property(np, "port-mapping-mode", NULL))
hub->conf_data3 |= BIT(3);
if (of_get_property(np, "string-support", NULL))
hub->conf_data3 |= BIT(0);
hub->non_rem_dev = USB251XB_DEF_NON_REMOVABLE_DEVICES;
cproperty_u32 = of_get_property(np, "non-removable-ports", &len);
if (cproperty_u32 && (len / sizeof(u32)) > 0) {
for (i = 0; i < len / sizeof(u32); i++) {
u32 port = be32_to_cpu(cproperty_u32[i]);
if ((port >= 1) && (port <= 4))
hub->non_rem_dev |= BIT(port);
}
}
hub->port_disable_sp = USB251XB_DEF_PORT_DISABLE_SELF;
cproperty_u32 = of_get_property(np, "sp-disabled-ports", &len);
if (cproperty_u32 && (len / sizeof(u32)) > 0) {
for (i = 0; i < len / sizeof(u32); i++) {
u32 port = be32_to_cpu(cproperty_u32[i]);
if ((port >= 1) && (port <= 4))
hub->port_disable_sp |= BIT(port);
}
}
hub->port_disable_bp = USB251XB_DEF_PORT_DISABLE_BUS;
cproperty_u32 = of_get_property(np, "bp-disabled-ports", &len);
if (cproperty_u32 && (len / sizeof(u32)) > 0) {
for (i = 0; i < len / sizeof(u32); i++) {
u32 port = be32_to_cpu(cproperty_u32[i]);
if ((port >= 1) && (port <= 4))
hub->port_disable_bp |= BIT(port);
}
}
hub->power_on_time = USB251XB_DEF_POWER_ON_TIME;
if (!of_property_read_u32(np, "power-on-time-ms", property_u32))
hub->power_on_time = min_t(u8, *property_u32 / 2, 255);
if (of_property_read_u16_array(np, "language-id", &hub->lang_id, 1))
hub->lang_id = USB251XB_DEF_LANGUAGE_ID;
cproperty_char = of_get_property(np, "manufacturer", NULL);
strlcpy(str, cproperty_char ? : USB251XB_DEF_MANUFACTURER_STRING,
sizeof(str));
hub->manufacturer_len = strlen(str) & 0xFF;
memset(hub->manufacturer, 0, USB251XB_STRING_BUFSIZE);
len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
(wchar_t *)hub->manufacturer,
USB251XB_STRING_BUFSIZE);
cproperty_char = of_get_property(np, "product", NULL);
strlcpy(str, cproperty_char ? : data->product_str, sizeof(str));
hub->product_len = strlen(str) & 0xFF;
memset(hub->product, 0, USB251XB_STRING_BUFSIZE);
len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
(wchar_t *)hub->product,
USB251XB_STRING_BUFSIZE);
cproperty_char = of_get_property(np, "serial", NULL);
strlcpy(str, cproperty_char ? : USB251XB_DEF_SERIAL_STRING,
sizeof(str));
hub->serial_len = strlen(str) & 0xFF;
memset(hub->serial, 0, USB251XB_STRING_BUFSIZE);
len = min_t(size_t, USB251XB_STRING_BUFSIZE / 2, strlen(str));
len = utf8s_to_utf16s(str, len, UTF16_LITTLE_ENDIAN,
(wchar_t *)hub->serial,
USB251XB_STRING_BUFSIZE);
/* The following parameters are currently not exposed to devicetree, but
* may be as soon as needed.
*/
hub->max_power_sp = USB251XB_DEF_MAX_POWER_SELF;
hub->max_power_bp = USB251XB_DEF_MAX_POWER_BUS;
hub->max_current_sp = USB251XB_DEF_MAX_CURRENT_SELF;
hub->max_current_bp = USB251XB_DEF_MAX_CURRENT_BUS;
hub->bat_charge_en = USB251XB_DEF_BATTERY_CHARGING_ENABLE;
hub->boost_up = USB251XB_DEF_BOOST_UP;
hub->boost_x = USB251XB_DEF_BOOST_X;
hub->port_swap = USB251XB_DEF_PORT_SWAP;
hub->port_map12 = USB251XB_DEF_PORT_MAP_12;
hub->port_map34 = USB251XB_DEF_PORT_MAP_34;
return 0;
}
static const struct of_device_id usb251xb_of_match[] = {
{
.compatible = "microchip,usb2512b",
.data = &usb2512b_data,
}, {
.compatible = "microchip,usb2512bi",
.data = &usb2512bi_data,
}, {
.compatible = "microchip,usb2513b",
.data = &usb2513b_data,
}, {
.compatible = "microchip,usb2513bi",
.data = &usb2513bi_data,
}, {
.compatible = "microchip,usb2514b",
.data = &usb2514b_data,
}, {
.compatible = "microchip,usb2514bi",
.data = &usb2514bi_data,
}, {
/* sentinel */
}
};
MODULE_DEVICE_TABLE(of, usb251xb_of_match);
#else /* CONFIG_OF */
static int usb251xb_get_ofdata(struct usb251xb *hub,
struct usb251xb_data *data)
{
return 0;
}
#endif /* CONFIG_OF */
static int usb251xb_probe(struct usb251xb *hub)
{
struct device *dev = hub->dev;
struct device_node *np = dev->of_node;
const struct of_device_id *of_id = of_match_device(usb251xb_of_match,
dev);
int err;
if (np) {
err = usb251xb_get_ofdata(hub,
(struct usb251xb_data *)of_id->data);
if (err) {
dev_err(dev, "failed to get ofdata: %d\n", err);
return err;
}
}
err = usb251xb_connect(hub);
if (err) {
dev_err(dev, "Failed to connect hub (%d)\n", err);
return err;
}
dev_info(dev, "Hub probed successfully\n");
return 0;
}
static int usb251xb_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct usb251xb *hub;
hub = devm_kzalloc(&i2c->dev, sizeof(struct usb251xb), GFP_KERNEL);
if (!hub)
return -ENOMEM;
i2c_set_clientdata(i2c, hub);
hub->dev = &i2c->dev;
hub->i2c = i2c;
return usb251xb_probe(hub);
}
static const struct i2c_device_id usb251xb_id[] = {
{ "usb2512b", 0 },
{ "usb2512bi", 0 },
{ "usb2513b", 0 },
{ "usb2513bi", 0 },
{ "usb2514b", 0 },
{ "usb2514bi", 0 },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(i2c, usb251xb_id);
static struct i2c_driver usb251xb_i2c_driver = {
.driver = {
.name = DRIVER_NAME,
.of_match_table = of_match_ptr(usb251xb_of_match),
},
.probe = usb251xb_i2c_probe,
.id_table = usb251xb_id,
};
module_i2c_driver(usb251xb_i2c_driver);
MODULE_AUTHOR("Richard Leitner <richard.leitner@skidata.com>");
MODULE_DESCRIPTION("USB251xB/xBi USB 2.0 Hub Controller Driver");
MODULE_LICENSE("GPL");
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