Messages in this thread | | | Subject | Re: [PATCH v3 0/5] ACPI: parse the SPCR table | From | Jeremy Linton <> | Date | Thu, 18 Feb 2016 15:15:44 -0600 |
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On 02/15/2016 12:05 PM, Aleksey Makarov wrote: > This patchset is based on the patchset by Leif Lindholm [1] > > 'ARM Server Base Boot Requirements' [2] mentions SPCR (Serial Port > Console Redirection Table) [3] as a mandatory ACPI table that > specifies the configuration of serial console. > > SPCR support is included in QEMU's ARM mach-virt since 2.4 release. > > Introduce a new function acpi_console_check(). At the uart port > registration, this function checks if the ACPI SPCR table specifies > its argument of type struct uart_port to be a console > and if so calls add_preferred_console(). > > Use SPCR to tell if SBSA serial driver should use 32-bit access to registers. > > To be able to access SPCR table each time any console is registered > change __init to __ref for early_acpi_os_unmap_memory(). > > The patchset should be applied to tty-next. (trimming)
This works on the JunoR2 with a new enough firmware to have the SPCR table.
Tested-by: Jeremy Linton <jeremy.linton@arm.com>
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