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Re: [PATCH v3 0/5] ACPI: parse the SPCR table

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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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[PATCH v3 0/5] ACPI: parse the SPCR table Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-15 19:20 +0100
  [PATCH v3 1/5] ACPI: change __init to __ref for early_acpi_os_unmap_memory() Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-15 19:20 +0100
    RE: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() "Zheng, Lv" <lv.zheng@intel.com> - 2016-02-17 03:50 +0100
      RE: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() "Zheng, Lv" <lv.zheng@intel.com> - 2016-02-17 04:00 +0100
        Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-17 14:10 +0100
          RE: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() "Zheng, Lv" <lv.zheng@intel.com> - 2016-02-18 04:40 +0100
            Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Peter Hurley <peter@hurleysoftware.com> - 2016-02-18 23:10 +0100
              RE: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() "Zheng, Lv" <lv.zheng@intel.com> - 2016-02-19 04:00 +0100
                Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-19 12:10 +0100
                RE: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() "Zheng, Lv" <lv.zheng@intel.com> - 2016-02-22 03:30 +0100
                Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-22 16:10 +0100
              Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-19 11:50 +0100
                Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Peter Hurley <peter@hurleysoftware.com> - 2016-02-19 16:30 +0100
                Re: [PATCH v3 1/5] ACPI: change __init to __ref for early_acpi_os_unmap_memory() Christopher Covington <cov@codeaurora.org> - 2016-02-19 18:30 +0100
                Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Peter Hurley <peter@hurleysoftware.com> - 2016-02-22 06:40 +0100
                Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-22 15:50 +0100
                Re: [PATCH v3 1/5] ACPI: change __init to __ref for  early_acpi_os_unmap_memory() Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-22 15:40 +0100
  [PATCH v3 3/5] ACPI: enable ACPI_SPCR_TABLE on ARM64 Aleksey Makarov <aleksey.makarov@linaro.org> - 2016-02-15 19:20 +0100
  Re: [PATCH v3 0/5] ACPI: parse the SPCR table Mark Salter <msalter@redhat.com> - 2016-02-16 20:20 +0100
  Re: [PATCH v3 0/5] ACPI: parse the SPCR table Christopher Covington <cov@codeaurora.org> - 2016-02-17 03:40 +0100
  Re: [PATCH v3 0/5] ACPI: parse the SPCR table Jeremy Linton <jeremy.linton@arm.com> - 2016-02-18 22:20 +0100

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