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From: Matthias Kaehlcke <matthias@kaehlcke.net>
To: barebox@lists.infradead.org
Subject: [PATCH] edb93xx: Fix SDRAM initialization
Date: Wed, 10 Feb 2010 20:56:15 +0100	[thread overview]
Message-ID: <20100210195615.GE374@darwin> (raw)

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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             reply	other threads:[~2010-02-10 19:56 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-02-10 19:56 Matthias Kaehlcke [this message]
2010-02-12  7:09 ` Sascha Hauer

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