On Wed, Jan 06, 2016 at 02:08:18AM +0000, Wang, Annie wrote:
> How about I add select ARM_AMBA and SERIAL_8250 in arch/x86/Kconfig?
Yeah, select sounds good in that case, except in that particular case ...
>
> diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
> index db3622f..0fe6657 100644
> --- a/arch/x86/Kconfig
> +++ b/arch/x86/Kconfig
> @@ -537,11 +537,15 @@ config X86_AMD_PLATFORM_DEVICE
> depends on ACPI
> select COMMON_CLK
> select PINCTRL
> + select SERIAL_8250
> + select ARM_AMBA
... that's a X86_AMD_PLATFORM_DEVICE which selects ARM thing? i.e.,
ARM_AMBA. Can that even work?
[ Rant on the side: And that ARM_AMBA thing has, of course, no effing
help text. Dammit, people need to start explaining those cryptic
abbreviations. Somewhere in the code I found "Advanced Microcontroller
Bus Architecture". This is clearly suboptimal. ]
So why does the X86 platform device need to select the AMBA crap?
> ---help---
> Select to interpret AMD specific ACPI device to platform device
> such as I2C, UART, GPIO found on AMD Carrizo and later chipsets.
> I2C and UART depend on COMMON_CLK to set clock. GPIO driver is
> - implemented under PINCTRL subsystem.
> + implemented under PINCTRL subsystem. Carrizo's UART is implemented
> + under SERIAL_8250. Carrizo's UART DMA device is an amba device,
> + it selects ARM_AMBA option.
As I already said before, please refrain from using platform names like
Carrizo because people have no clue what those are. Only the marketing
people do. Use CPU family + models instead.
> CPU_SUP_AMD is only configured in X86 arch. AMD future ARM64 processors may
> also need acpi to platform support.
So this code is going to be shared between X86 and ARM64?
--
Regards/Gruss,
Boris.
ECO tip #101: Trim your mails when you reply.
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