linux-kernel - Re: [PATCH v2] ARM: tegra: expose chip ID and revision

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Date:	Tue, 12 Mar 2013 11:58:56 -0600
From:	Stephen Warren <swarren@...dotorg.org>
To:	Danny Huang <dahuang@...dia.com>
CC:	linux@....linux.org.uk, hdoyu@...dia.com, olof@...om.net,
	gregkh@...uxfoundation.org, arnd@...db.de, josephl@...dia.com,
	pdeschrijver@...dia.com, pgaikwad@...dia.com,
	linux-arm-kernel@...ts.infradead.org, linux-tegra@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] ARM: tegra: expose chip ID and revision

On 03/12/2013 06:01 AM, Danny Huang wrote:
> Expose Tegra chip ID and revision in /sys/devices/soc for user mode
> usage

> diff --git a/arch/arm/mach-tegra/Kconfig b/arch/arm/mach-tegra/Kconfig
> index d1c4893..b7abcfa 100644
> --- a/arch/arm/mach-tegra/Kconfig
> +++ b/arch/arm/mach-tegra/Kconfig
> @@ -17,6 +17,7 @@ config ARCH_TEGRA_2x_SOC
>  	select PINCTRL_TEGRA20
>  	select PL310_ERRATA_727915 if CACHE_L2X0
>  	select PL310_ERRATA_769419 if CACHE_L2X0
> +	select SOC_BUS
>  	select USB_ARCH_HAS_EHCI if USB_SUPPORT
>  	select USB_ULPI if USB
>  	select USB_ULPI_VIEWPORT if USB_SUPPORT
> @@ -36,6 +37,7 @@ config ARCH_TEGRA_3x_SOC
>  	select PINCTRL
>  	select PINCTRL_TEGRA30
>  	select PL310_ERRATA_769419 if CACHE_L2X0
> +	select SOC_BUS
>  	select USB_ARCH_HAS_EHCI if USB_SUPPORT
>  	select USB_ULPI if USB
>  	select USB_ULPI_VIEWPORT if USB_SUPPORT
> @@ -51,6 +53,7 @@ config ARCH_TEGRA_114_SOC
>  	select CPU_V7
>  	select PINCTRL
>  	select PINCTRL_TEGRA114
> +	select SOC_BUS
>  	help

I assume we'll want this feature for all Tegra SoCs. Can't we select it
from ARCH_TEGRA, rather than separately for each chip? CONFIG_ARCH_TEGRA
is defined in arch/arm/Kconfig.
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