[U-Boot] [PATCH v3 3/4] kirkwood: implement kw_sdram_size_adjust

[Prafulla Wadaskar]

> -----Original Message-----
> From: Holger Brunck [mailto:holger.brunck at keymile.com]
> Sent: 20 July 2012 18:04
> To: u-boot at lists.denx.de
> Cc: Gerlando Falauto; Holger Brunck; Prafulla Wadaskar; Valentin
> Longchamp; Marek Vasut
> Subject: [PATCH v3 3/4] kirkwood: implement kw_sdram_size_adjust
> 
> From: Gerlando Falauto <gerlando.falauto at keymile.com>
> 
> Size of the SDRAM chips might differ between any two (otherwise
> identical) instances of the same board. So add a function which reads
> out the current ram size and set them in the SDRAM size register of
> kirkwood.
> 
> Signed-off-by: Gerlando Falauto <gerlando.falauto at keymile.com>
> Signed-off-by: Holger Brunck <holger.brunck at keymile.com>
> cc: Prafulla Wadaskar <prafulla at marvell.com>
> cc: Valentin Longchamp <valentin.longchamp at keymile.com>
> cc: Marek Vasut <marex at denx.de>
> ---
> chages for v3:
>   - rename dram_size_fixup to kw_sdramsize_adjust and move them to
> kirkwood/dram.c
> 
> changes for v2:
>   - rebase to current u-boot-marvell.git master branch
> 
>  arch/arm/cpu/arm926ejs/kirkwood/dram.c   |   11 +++++++++++
>  arch/arm/include/asm/arch-kirkwood/cpu.h |    1 +
>  2 files changed, 12 insertions(+), 0 deletions(-)
> 
> diff --git a/arch/arm/cpu/arm926ejs/kirkwood/dram.c
> b/arch/arm/cpu/arm926ejs/kirkwood/dram.c
> index 5e2f9d8..9f97964 100644
> --- a/arch/arm/cpu/arm926ejs/kirkwood/dram.c
> +++ b/arch/arm/cpu/arm926ejs/kirkwood/dram.c
> @@ -97,6 +97,17 @@ u32 kw_sdram_bs(enum memory_bank bank)
>  	return result;
>  }
> 
> +void kw_sdram_size_adjust(void)

I think you must pass bank_id to this function so that one can tune any/all of the four available DRAM banks.

Regards..
Prafulla . . .

> +{
> +	u32 size;
> +
> +	/* probe currently equipped RAM size */
> +	size = get_ram_size((void *)kw_sdram_bar(0), kw_sdram_bs(0));
> +
> +	/* adjust SDRAM window size accordingly */
> +	kw_sdram_bs_set(0, size);
> +}
> +
>  #ifndef CONFIG_SYS_BOARD_DRAM_INIT
>  int dram_init(void)
>  {
> diff --git a/arch/arm/include/asm/arch-kirkwood/cpu.h
> b/arch/arm/include/asm/arch-kirkwood/cpu.h
> index d28c51a..128393c 100644
> --- a/arch/arm/include/asm/arch-kirkwood/cpu.h
> +++ b/arch/arm/include/asm/arch-kirkwood/cpu.h
> @@ -159,6 +159,7 @@ void reset_cpu(unsigned long ignored);
>  unsigned char get_random_hex(void);
>  unsigned int kw_sdram_bar(enum memory_bank bank);
>  unsigned int kw_sdram_bs(enum memory_bank bank);
> +void kw_sdram_size_adjust(void);
>  int kw_config_adr_windows(void);
>  void kw_config_gpio(unsigned int gpp0_oe_val, unsigned int
> gpp1_oe_val,
>  		unsigned int gpp0_oe, unsigned int gpp1_oe);
> --
> 1.7.1