[PATCH v10 3/4] ARM64: ACPI: enable ACPI_SPCR_TABLE

From
Graeme Gregory <hidden>
Date
2016-09-08 13:25:32
Also in
linux-acpi, linux-serial, lkml
Reply to
Will Deacon, 2016-09-08
On Thu, Sep 08, 2016 at 12:16:55PM +0100, Will Deacon wrote:
On Wed, Sep 07, 2016 at 12:30:19PM +0300, Aleksey Makarov wrote:
quoted
On 09/05/2016 03:36 PM, Aleksey Makarov wrote:
quoted
SBBR mentions SPCR as a mandatory ACPI table.  So enable it for ARM64

Earlycon should be set up as early as possible.  ACPI boot tables are
mapped in arch/arm64/kernel/acpi.c:acpi_boot_table_init() that
is called from setup_arch() and that's where we parse SPCR.
So it has to be opted-in per-arch.

When ACPI_SPCR_TABLE is defined initialization of DT earlycon is
deferred until the DT/ACPI decision is done.  Initialize DT earlycon
if ACPI is disabled.
Hi Will, Catalin,

Can you review this patch and consider ACKing it please?
Hanjun, Al, Mark, Graeme -- any comments on this?
We have been using this series internally for a long while for boards
with SBSA UART. So IMO it is good to go. We have worked with some OEMs
to fix firmware bugs discovered with this patch series so it should work
with machines in the wild.

Graeme
Thread (29 messages) 29 messages, 8 authors, last reply 2016-09-27
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