/**
* struct dw_i2c_dev - private i2c-designware data
* @dev: driver model device node
* @base: IO registers pointer
* @cmd_complete: tx completion indicator
* @lock: protect this struct and IO registers
* @clk: input reference clock
* @cmd_err: run time hadware error code
* @msgs: points to an array of messages currently being transfered
* @msgs_num: the number of elements in msgs
* @msg_write_idx: the element index of the current tx message in the msgs
* array
* @tx_buf_len: the length of the current tx buffer
* @tx_buf: the current tx buffer
* @msg_read_idx: the element index of the current rx message in the msgs
* array
* @rx_buf_len: the length of the current rx buffer
* @rx_buf: the current rx buffer
* @msg_err: error status of the current transfer
* @status: i2c master status, one of STATUS_*
* @abort_source: copy of the TX_ABRT_SOURCE register
* @irq: interrupt number for the i2c master
* @adapter: i2c subsystem adapter node
* @tx_fifo_depth: depth of the hardware tx fifo
* @rx_fifo_depth: depth of the hardware rx fifo
*/
struct dw_i2c_dev {
struct device *dev;
void __iomem *base;
struct completion cmd_complete;
struct mutex lock;
struct clk *clk;
u32 clock;
int cmd_err;
struct i2c_msg *msgs;
int msgs_num;
int msg_write_idx;
u32 tx_buf_len;
u8 *tx_buf;
int msg_read_idx;
u32 rx_buf_len;
int rx_cmd;
u8 *rx_buf;
int msg_err;
unsigned int status;
u32 abort_source;
int irq;
struct i2c_adapter adapter;
unsigned int tx_fifo_depth;
unsigned int rx_fifo_depth;
};