[PATCH] edb93xx: Fix SDRAM initialization

[PATCH] edb93xx: Fix SDRAM initialization

[Matthias Kaehlcke]

Before programming the SDRAM mode registers, mode register update mode must be
selected by setting the MRS bit and clearing INIT in GlConfig

Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>
---
 board/edb93xx/sdram_cfg.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)

diff --git a/board/edb93xx/sdram_cfg.c b/board/edb93xx/sdram_cfg.c
index 9f56f72..25b214b 100644
--- a/board/edb93xx/sdram_cfg.c
+++ b/board/edb93xx/sdram_cfg.c
@@ -111,6 +111,11 @@ static void setup_refresh_timer(void)
 
 static void program_mode_registers(void)
 {
+	struct sdram_regs *sdram = (struct sdram_regs *)SDRAM_BASE;
+
+	/* Select mode register update mode */
+	writel(GLCONFIG_MRS | GLCONFIG_CKE, &sdram->glconfig);
+
 	PROGRAM_MODE_REG(0);
 
 #if (CONFIG_EP93XX_SDRAM_NUM_BANKS >= 2)
-- 
1.6.5


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Re: [PATCH] edb93xx: Fix SDRAM initialization

[Sascha Hauer]

On Wed, Feb 10, 2010 at 08:56:15PM +0100, Matthias Kaehlcke wrote:
> Before programming the SDRAM mode registers, mode register update mode must be
> selected by setting the MRS bit and clearing INIT in GlConfig
> 
> Signed-off-by: Matthias Kaehlcke <matthias@kaehlcke.net>

Ok, applied

Sascha

> ---
>  board/edb93xx/sdram_cfg.c |    5 +++++
>  1 files changed, 5 insertions(+), 0 deletions(-)
> 
> diff --git a/board/edb93xx/sdram_cfg.c b/board/edb93xx/sdram_cfg.c
> index 9f56f72..25b214b 100644
> --- a/board/edb93xx/sdram_cfg.c
> +++ b/board/edb93xx/sdram_cfg.c
> @@ -111,6 +111,11 @@ static void setup_refresh_timer(void)
>  
>  static void program_mode_registers(void)
>  {
> +	struct sdram_regs *sdram = (struct sdram_regs *)SDRAM_BASE;
> +
> +	/* Select mode register update mode */
> +	writel(GLCONFIG_MRS | GLCONFIG_CKE, &sdram->glconfig);
> +
>  	PROGRAM_MODE_REG(0);
>  
>  #if (CONFIG_EP93XX_SDRAM_NUM_BANKS >= 2)
> -- 
> 1.6.5
> 
> 
> _______________________________________________
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> barebox@lists.infradead.org
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> 

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