RTEMS | bsp/aarch64/raspberrypi: Add I2C interrupt support (!682)

[Shaunak Datar (@skdatar)]

Shaunak Datar commented on a discussion on bsps/aarch64/raspberrypi/i2c/raspberrypi-i2c.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/682#note_129425

 >    bool                    read_transfer;
 >  } raspberrypi_i2c_bus;
 >  
 > -static int i2c_polling_read( raspberrypi_i2c_bus *bus )
 > +static int rpi_i2c_bus_transfer( raspberrypi_i2c_bus *bus )
 >  {
 > -  while ( !( S_REG( bus ) & S_DONE ) && ( bus->remaining_bytes > 0 ) ) {
 > -    while ( ( S_REG( bus ) & S_RXD ) && ( bus->remaining_bytes > 0 ) ) {
 > +  while ( bus->remaining_bytes > 0 ) {
 > +    if ( bus->read_transfer ) {
 > +      while ( ( S_REG( bus ) & S_RXD ) == 0 ) {
 > +      }

Added a check before entering the transfer for the S_ERR

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/682#note_129425
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