Re: [Xen-devel] [PATCH v4 19/21] arm/acpi: Initialize serial port from ACPI SPCR table

[Shannon Zhao <zhaoshenglong@xxxxxxxxxx>]

On 2016/1/25 23:05, Jan Beulich wrote:
>>>> On 23.01.16 at 10:20, <zhaoshenglong@xxxxxxxxxx> wrote:
>> --- a/xen/include/acpi/actbl2.h
>> +++ b/xen/include/acpi/actbl2.h
>> @@ -815,6 +815,15 @@ struct acpi_table_spcr {
>>  
>>  #define ACPI_SPCR_DO_NOT_DISABLE    (1)
>>  
>> +/* SPCR Interface type */
>> +#define ACPI_SPCR_TYPE_16550                0
>> +#define ACPI_SPCR_TYPE_16550_SUB    0x1
>> +#define ACPI_SPCR_TYPE_PL011                0x3
>> +#define ACPI_SPCR_TYPE_SBSA_32              0xd
>> +#define ACPI_SPCR_TYPE_SBSA         0xe
>> +#define ACPI_SPCR_TYPE_DCC          0xf
>> +#define ACPI_SPCR_TYPE_BCM2835              0x10
> 
> It seems very likely to me that this part of the change actually would
> have a Linux counterpart, in which case it should be submitted as such.
> 

I checked it with Linux master. Those interface types are shared with
DGB2 table. But Linux master only adds ACPI_DBG2_16550_COMPATIBLE and
ACPI_DBG2_16550_SUBSET, doesn't have other types. And actually we only
need the interface type not the DBG2 table. Yes, it could port commit
[1] first then add other types. Is that fine?

[1]4e2f9c278ad84196991fcf6f6646a3e15967fe90

Thanks,
-- 
Shannon


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