[U-Boot] [PATCH 7/9] imx: mx6: ddr init MMDC according to ddr_type

[Stefan Roese <sr@denx.de>]

On 17.08.2015 05:29, Peng Fan wrote:
> To i.MX6, DDR3 and LPDDR2 is supported, so rename function mx6_dram_cfg
> to mx6_ddr3_cfg and the original mx6_dram_cfg function only is a wrapper.
> The new reimplemented function mx6_dram_cfg only invokes mx6_ddr3_cfg
> when ddr_type is for DDR3. Later we can use ddr_type to initialize
> MMDC for LPDDR2.
> Initialize ddr_type for different boards which enable SPL.
>
> Signed-off-by: Peng Fan <Peng.Fan@freescale.com>
> Cc: Stefano Babic <sbabic@denx.de>
> Cc: Tim Harvey <tharvey@gateworks.com>
> Cc: Stefan Roese <sr@denx.de>
> Cc: Fabio Estevam <fabio.estevam@freescale.com>
> ---
>   arch/arm/cpu/armv7/mx6/ddr.c                      | 14 +++++++++++++-
>   arch/arm/include/asm/arch-mx6/mx6-ddr.h           |  2 +-
>   board/barco/platinum/spl_picon.c                  |  1 +
>   board/barco/platinum/spl_titanium.c               |  1 +
>   board/freescale/mx6sabresd/mx6sabresd.c           |  1 +
>   board/freescale/mx6sxsabresd/mx6sxsabresd.c       |  1 +
>   board/freescale/mx6ul_14x14_evk/mx6ul_14x14_evk.c |  1 +
>   board/gateworks/gw_ventana/gw_ventana_spl.c       |  1 +
>   board/solidrun/mx6cuboxi/mx6cuboxi.c              |  1 +
>   9 files changed, 21 insertions(+), 2 deletions(-)
>
> diff --git a/arch/arm/cpu/armv7/mx6/ddr.c b/arch/arm/cpu/armv7/mx6/ddr.c
> index 3f23abf..a6bef60 100644
> --- a/arch/arm/cpu/armv7/mx6/ddr.c
> +++ b/arch/arm/cpu/armv7/mx6/ddr.c
> @@ -348,7 +348,7 @@ void mx6sdl_dram_iocfg(unsigned width,
>   		mmdc1->entry = value;					  \
>   	} while (0)
>
> -void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
> +void mx6_ddr3_cfg(const struct mx6_ddr_sysinfo *sysinfo,
>   		  const struct mx6_mmdc_calibration *calib,
>   		  const struct mx6_ddr3_cfg *ddr3_cfg)
>   {
> @@ -655,3 +655,15 @@ void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
>   	/* wait for auto-ZQ calibration to complete */
>   	mdelay(1);
>   }
> +
> +void mx6_dram_cfg(const struct mx6_ddr_sysinfo *sysinfo,
> +		  const struct mx6_mmdc_calibration *calib,
> +		  const void *ddr_cfg)
> +{
> +	if (sysinfo->ddr_type == 0) {
> +		mx6_ddr3_cfg(sysinfo, calib, ddr_cfg);
> +	} else {
> +		puts("Unsupported ddr type\n");
> +		hang();
> +	}
> +}
> diff --git a/arch/arm/include/asm/arch-mx6/mx6-ddr.h b/arch/arm/include/asm/arch-mx6/mx6-ddr.h
> index 49fc9e5..e3ba140 100644
> --- a/arch/arm/include/asm/arch-mx6/mx6-ddr.h
> +++ b/arch/arm/include/asm/arch-mx6/mx6-ddr.h
> @@ -439,7 +439,7 @@ void mx6sl_dram_iocfg(unsigned width,
>   /* configure mx6 mmdc registers */
>   void mx6_dram_cfg(const struct mx6_ddr_sysinfo *,
>   		  const struct mx6_mmdc_calibration *,
> -		  const struct mx6_ddr3_cfg *);
> +		  const void *);
>
>   #endif /* CONFIG_SPL_BUILD */
>
> diff --git a/board/barco/platinum/spl_picon.c b/board/barco/platinum/spl_picon.c
> index f421c21..aac0948 100644
> --- a/board/barco/platinum/spl_picon.c
> +++ b/board/barco/platinum/spl_picon.c
> @@ -137,6 +137,7 @@ static void spl_dram_init(int width)
>   		.bi_on = 1,	/* Bank interleaving enabled */
>   		.sde_to_rst = 0x10,	/* 14 cycles, 200us (JEDEC default) */
>   		.rst_to_cke = 0x23,	/* 33 cycles, 500us (JEDEC default) */
> +		.ddr_type = 0,	/* DDR3 */

Perhaps adding an enum here would be better. You could remove the 
comment then as well.

Other than this:

Reviewed-by: Stefan Roese <sr@denx.de>

Thanks,
Stefan