[U-Boot] [[PATCH v2]pandaboard: 1/1] Modification of Elpida DDR2 RAM for Pandaboard-ES Rev B3

[Tom Rini]

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On 11/14/2013 05:06 AM, Hardik wrote:
> From: Hardik Patel <hardik.patel at volansystech.com>
> 
> Signed-off-by: Hardik Patel <hardik.patel at volansystech.com>
> ---
>  arch/arm/cpu/armv7/omap4/sdram_elpida.c |    2 +-
>  board/ti/panda/panda.c                  |   24 ++++++++++++++++++++++++
>  2 files changed, 25 insertions(+), 1 deletion(-)
> 
> diff --git a/arch/arm/cpu/armv7/omap4/sdram_elpida.c b/arch/arm/cpu/armv7/omap4/sdram_elpida.c
> index e4c8316..9fbdeea 100644
> --- a/arch/arm/cpu/armv7/omap4/sdram_elpida.c
> +++ b/arch/arm/cpu/armv7/omap4/sdram_elpida.c
> @@ -123,7 +123,7 @@ static void emif_get_reg_dump_sdp(u32 emif_nr, const struct emif_regs **regs)
>  		*regs = &emif_regs_elpida_200_mhz_2cs;
>  	else if (omap4_rev == OMAP4430_ES2_3)
>  		*regs = &emif_regs_elpida_400_mhz_1cs;
> -	else if (omap4_rev < OMAP4470_ES1_0)
> +	else if (omap4_rev < OMAP4470_ES1_0 && !is_panda_es_rev_b3())
>  		*regs = &emif_regs_elpida_400_mhz_2cs;
>  	else
>  		*regs = &emif_regs_elpida_400_mhz_1cs;
> diff --git a/board/ti/panda/panda.c b/board/ti/panda/panda.c
> index c104024..5a7f80a 100644
> --- a/board/ti/panda/panda.c
> +++ b/board/ti/panda/panda.c
> @@ -122,6 +122,30 @@ int get_board_revision(void)
>  	return board_id;
>  }
>  
> +/*
> +* Routine: is_panda_es_rev_b3
> +* Description: Detect if we are running on B3 version of ES panda board,
> +*              This can be done by reading the level of GPIO 171 
> +*              and checking the processor revisions.
> +*              GPIO171: 1 => Panda ES Rev B3
> +*/
> +u8 is_panda_es_rev_b3(void)
> +{
> +        int processor_rev = omap_revision();
> +        int ret = 0;
> +
> +        if ((processor_rev >= OMAP4460_ES1_0 &&
> +             processor_rev <= OMAP4460_ES1_1)) {
> +
> +                /* Setup the mux for the common board ID pins (gpio 171) */
> +                writew((IEN | M3), (*ctrl)->control_padconf_core_base + UNIPRO_TX0);
> +
> +                /* if processor_rev is panda ES and GPIO171 is 1, it is rev b3 */
> +                ret = gpio_get_value(PANDA_BOARD_ID_2_GPIO);
> +        }
> +        return ret;
> +}
> +
>  /**
>   * @brief misc_init_r - Configure Panda board specific configurations
>   * such as power configurations, ethernet initialization as phase2 of

This isn't right.  What I was saying is that board/ti/panda/panda.c
needs to provide its own emif_get_reg_dump function, which will (as
designed) override the current one from
arch/arm/cpu/armv7/omap4/sdram_elpida.c

- -- 
Tom
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