diff options
| author | Juan Castillo <juan.castillo@arm.com> | 2015-11-16 16:53:38 +0000 |
|---|---|---|
| committer | Juan Castillo <juan.castillo@arm.com> | 2015-12-10 09:22:44 +0000 |
| commit | 12f654b6a88f6f927fe34d00eece537b01f444e3 (patch) | |
| tree | c73cfddac689a1b0a1827ae2687a30bd08e2a2ce /drivers | |
| parent | f3974ea5b17b0ec88091a8a8c59e56da0fe507f0 (diff) | |
De-feature PL011 UART driver to match generic UART spec
The Server Base System Architecture document (ARM-DEN-0029)
specifies a generic UART device. The programmer's view of this
generic UART is a subset of the ARM PL011 UART. However, the
current PL011 driver in Trusted Firmware uses some features
that are outside the generic UART specification.
This patch modifies the PL011 driver to exclude features outside
the SBSA generic UART specification by setting the boolean build
option 'PL011_GENERIC_UART=1'. Default value is 0 (use full
PL011 features).
User guide updated.
Fixes ARM-software/tf-issues#216
Change-Id: I6e0eb86f9d69569bc3980fb57e70d6da5d91a737
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/arm/pl011/pl011_console.S | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/arm/pl011/pl011_console.S b/drivers/arm/pl011/pl011_console.S index ea41e5d9..47608da3 100644 --- a/drivers/arm/pl011/pl011_console.S +++ b/drivers/arm/pl011/pl011_console.S @@ -60,6 +60,7 @@ func console_core_init /* Check the input base address */ cbz x0, core_init_fail +#if !PL011_GENERIC_UART /* Check baud rate and uart clock for sanity */ cbz w1, core_init_fail cbz w2, core_init_fail @@ -82,6 +83,7 @@ func console_core_init /* Enable tx, rx, and uart overall */ mov w1, #(PL011_UARTCR_RXE | PL011_UARTCR_TXE | PL011_UARTCR_UARTEN) str w1, [x0, #UARTCR] +#endif mov w0, #1 ret core_init_fail: |