usbblaster_spi.c: Refactor singleton states into reentrant pattern
Move global singleton states into a struct and store within
the spi_master data field for the life-time of the driver.
This is one of the steps on the way to move spi_master data
memory management behind the initialisation API, for more
context see other patches under the same topic "register_master_api".
This patch also introduces shutdown function for usbblaster, because
there was none previously and without shutdown function there is no
way to free spi_master data at the end of driver lifecycle.
Signed-off-by: Anastasia Klimchuk <firstname.lastname@example.org>
Tested-by: build bot (Jenkins) <email@example.com>
Reviewed-by: Edward O'Callaghan <firstname.lastname@example.org>
Reviewed-by: Angel Pons <email@example.com>
1 file changed