RTEMS | Add the support for i2c driver in the aarch64/raspberrypi bsp (!363)

[Gedare Bloom (@gedare)]

Gedare Bloom commented on a discussion on bsps/aarch64/raspberrypi/i2c/raspberrypi-i2c.c: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/363#note_125173

 > +  raspberrypi_i2c_bus *bus = (raspberrypi_i2c_bus *) base;
 > +  uint32_t             clock_rate;
 > +  uint16_t             divider;
 > +
 > +  divider = BSC_CORE_CLK_HZ / clock;
 > +
 > +  clock_rate = BSC_CORE_CLK_HZ / divider;
 > +
 > +  while ( clock_rate > clock ) {
 > +    ++divider;
 > +    clock_rate = BSC_CORE_CLK_HZ / divider;
 > +  }
 > +
 > +  BCM2835_REG( bus->base_address + BCM2711_I2C_DIV ) = divider;
 > +
 > +  bus->input_clock = clock_rate;

yeah but if the `input_clock` isn't used, why keep it?

-- 
View it on GitLab: https://gitlab.rtems.org/rtems/rtos/rtems/-/merge_requests/363#note_125173
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