tree e538c512c9d2c65eff5990116b952ad157b4089a
parent c66bb641dbeed7dba60f2811da712db1cb144d09
author Vikram Kanigiri <vikram.kanigiri@arm.com> 1445356526 +0100
committer Vikram Kanigiri <vikram.kanigiri@arm.com> 1448632033 +0000

Fix TZC-400 peripheral detection

The TZC-400 driver implementation incorrectly uses the component
ID registers to detect the TZC-400 peripheral. As all ARM
peripherals share the same component ID, it doesn't allow to
uniquely identify the TZC-400 peripheral. This patch fixes the
TZC-400 driver by relying on the `part_number_0` and
`part_number_1` fields in the `PID` registers instead.
The `tzc_read_component_id` function has been replaced by
`tzc_read_peripheral_id`, which reads the 'part_number' values
and compares them with the TZC-400 peripheral ID.

Also, it adds a debug assertion to detect when the TZC driver
initialisation function is called multiple times.

Change-Id: I35949f6501a51c0a794144cd1c3a6db62440dce6