[U-Boot] [PATCH 1/4] Add deep sleep framework support for Freescale QorIQ platforms

[Tom Rini]

On Sun, Sep 28, 2014 at 04:59:45PM +0800, Yuantian.Tang at freescale.com wrote:
> From: Tang Yuantian <Yuantian.Tang at freescale.com>
> 
> When Freescale QorIQ SoCs wake up from deep sleep, control is
> passed to the primary core that starts executing uboot. After
> re-initialized some IP blocks, like DDRC, kernel will take
> responsibility to continue to restore environment it leaves before.
> 
> This patch adds the deep sleep framework support for all Freescale
> QorIQ platforms that use generic_board configuation.
> 
> Signed-off-by: Tang Yuantian <Yuantian.Tang at freescale.com>
> ---
>  common/board_f.c               | 10 +++++++++
>  drivers/ddr/fsl/arm_ddr_gen3.c | 48 +++++++++++++++++++++++++++++++++++++-----
>  include/fsl_ddr_sdram.h        |  2 ++
>  include/fsl_sleep.h            | 32 ++++++++++++++++++++++++++++
>  4 files changed, 87 insertions(+), 5 deletions(-)
>  create mode 100644 include/fsl_sleep.h
> 
> diff --git a/common/board_f.c b/common/board_f.c
> index e6aa298..b736d29 100644
> --- a/common/board_f.c
> +++ b/common/board_f.c
> @@ -56,6 +56,9 @@
>  #endif
>  #include <dm/root.h>
>  #include <linux/compiler.h>
> +#ifdef CONFIG_FSL_DEEP_SLEEP
> +#include <fsl_sleep.h>
> +#endif
>  
>  /*
>   * Pointer to initial global data area
> @@ -921,6 +924,9 @@ static init_fnc_t init_sequence_f[] = {
>  #if defined(CONFIG_MIPS) || defined(CONFIG_PPC)
>  	init_func_ram,
>  #endif
> +#ifdef CONFIG_FSL_DEEP_SLEEP
> +	fsl_dp_resume,
> +#endif

Is there not an existing hook you can use here instead?  Is misc_init_f
too early?  If we're going to add a new hook in here, it needs to be
somewhat generically named, with the requirements of the system spelled
out.  Some TI parts have a (setting aside marketing-speak) similar
function and I believe the U-Boot patches for that use an existing hook
to notice what happened and do what's needed.  Thanks!

-- 
Tom
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