Hello Heinz,
On 18/02/2022 17:18, Heinz Junkes wrote:
I'm still trying to get the booting and registering and initialising of the i2c
devices on the MVME3100 to work properly.
In confdefs/iodrivers.h the driver address table is built up and then
_IO_Initialize_all_drivers() is called without registering the individual
devices first.
the device drivers are already registered which means they are contained
in _IO_Driver_address_table.
If I now enter in already before in bspstart.c
RTEMS_SYSINIT_ITEM(
mvme3100_i2c_initialize,
RTEMS_SYSINIT_BSP_PRE_DRIVERS,
RTEMS_SYSINIT_ORDER_MIDDLE
);
a device (register it and e.g. got the major number 0) this is ignored by the
IO_Initialize_all_drivers().
Shouldn't initialisation be preceded by registration (
rtems_io_register_driver() )?
There are two ways to register a legacy device driver:
1. Through application configuration options which populate
_IO_Driver_address_table.
2. Via calls to rtems_io_register_driver().
Device drivers registered when _IO_Initialize_all_drivers() is called
are initialized. Adding a file system node is the job of the
initialization entry (done using mknod()).
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