[U-Boot] [PATCH 1/2] ARM: AM43xx: Add support for RTC only mode

[Tom Rini]

On Thu, Mar 15, 2018 at 04:09:52PM +0530, Keerthy wrote:

> From: Tero Kristo <t-kristo at ti.com>
> 
> Kernel stores information to the RTC_SCRATCH0 and RTC_SCRATCH1 registers
> for wakeup from RTC-only mode. Parse these registers during SPL boot and
> jump to the kernel resume vector if the device is waking up from RTC-only
> mode.
[snip]
> diff --git a/arch/arm/mach-omap2/am33xx/Kconfig b/arch/arm/mach-omap2/am33xx/Kconfig
> index 9a9ccd7..5ff4a85 100644
> --- a/arch/arm/mach-omap2/am33xx/Kconfig
> +++ b/arch/arm/mach-omap2/am33xx/Kconfig
> @@ -239,6 +239,13 @@ config TARGET_CM_T43
>  
>  endchoice
>  
> +config SPL_RTC_ONLY_SUPPORT
> +	bool
> +	depends on SPL
> +	prompt "Enable RTC ONLY Support"
> +	help
> +	  If you want RTC ONLY Support, say Y.

Please expand on the help content here.

[snip]
> +/*
> + * RTC only mode magic value, checked against during boot to see if we have
> + * a valid config
> + */
> +#define RTC_MAGIC_VAL		0x8cd0

Update the comment to include where this value needs to be kept in sync
with (what file in the kernel?).

[snip]
> +CONFIG_OF_LIST="am437x-gp-evm am437x-sk-evm am43x-epos-evm am437x-idk-evm"

We don't support this on all of those, do we?  I thought the comments
said you can't do it on ePOS...  Thanks!

-- 
Tom
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