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  4. struct_hsi_port(9)

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STRUCT HSI_PORT(9) High Speed Synchronous Serial STRUCT HSI_PORT(9)

NAME

struct_hsi_port - HSI port device

SYNOPSIS

struct hsi_port {


  struct device device;


  struct hsi_config tx_cfg;


  struct hsi_config rx_cfg;


  unsigned int num;


  unsigned int shared:1;


  int claimed;


  struct mutex lock;


  int (* async) (struct hsi_msg *msg);


  int (* setup) (struct hsi_client *cl);


  int (* flush) (struct hsi_client *cl);


  int (* start_tx) (struct hsi_client *cl);


  int (* stop_tx) (struct hsi_client *cl);


  int (* release) (struct hsi_client *cl);


  struct atomic_notifier_head n_head;
};

MEMBERS

device

Driver model representation of the device

tx_cfg

Current TX path configuration

rx_cfg

Current RX path configuration

num

Port number

shared

Set when port can be shared by different clients

claimed

Reference count of clients which claimed the port

lock

Serialize port claim

async

Asynchronous transfer callback

setup

Callback to set the HSI client configuration

flush

Callback to clean the HW state and destroy all pending transfers

start_tx

Callback to inform that a client wants to TX data

stop_tx

Callback to inform that a client no longer wishes to TX data

release

Callback to inform that a client no longer uses the port

n_head

Notifier chain for signaling port events to the clients.

COPYRIGHT

June 2024 Kernel Hackers Manual 3.10