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From: Alexander Shiyan <shc_work@mail.ru>
To: barebox@lists.infradead.org
Subject: [PATCH 02/13] ARM: clps711x: Fix setup bus wait state scaling factor for 13Mhz mode
Date: Mon, 11 Mar 2013 13:26:32 +0400	[thread overview]
Message-ID: <1362994003-22653-2-git-send-email-shc_work@mail.ru> (raw)
In-Reply-To: <1362994003-22653-1-git-send-email-shc_work@mail.ru>


Signed-off-by: Alexander Shiyan <shc_work@mail.ru>
---
 arch/arm/mach-clps711x/lowlevel.c |   16 ++++++++++------
 1 files changed, 10 insertions(+), 6 deletions(-)

diff --git a/arch/arm/mach-clps711x/lowlevel.c b/arch/arm/mach-clps711x/lowlevel.c
index 193f61a..58306f2 100644
--- a/arch/arm/mach-clps711x/lowlevel.c
+++ b/arch/arm/mach-clps711x/lowlevel.c
@@ -21,12 +21,12 @@ void __naked __bare_init clps711x_barebox_entry(u32 pllmult)
 {
 	u32 cpu, bus;
 
-	/* Setup base clocking, Enable SDQM pins  */
-	writel(SYSCON3_CLKCTL0 | SYSCON3_CLKCTL1, SYSCON3);
-	asm("nop");
-
 	/* Check if we running from external 13 MHz clock */
 	if (!(readl(SYSFLG2) & SYSFLG2_CKMODE)) {
+		/* Setup bus wait state scaling factor to 2  */
+		writel(SYSCON3_CLKCTL0 | SYSCON3_CLKCTL1, SYSCON3);
+		asm("nop");
+
 		/* Check valid multiplier, default to 74 MHz */
 		if ((pllmult < 20) || (pllmult > 50))
 			pllmult = 40;
@@ -42,11 +42,15 @@ void __naked __bare_init clps711x_barebox_entry(u32 pllmult)
 			cpu = pllmult * 3686400;
 
 		if (cpu >= 36864000)
-			bus = cpu /2;
+			bus = cpu / 2;
 		else
 			bus = 36864000 / 2;
-	} else
+	} else {
 		bus = 13000000;
+		/* Setup bus wait state scaling factor to 1  */
+		writel(0, SYSCON3);
+		asm("nop");
+	}
 
 	/* CLKEN select, SDRAM width=32 */
 	writel(SYSCON2_CLKENSL, SYSCON2);
-- 
1.7.3.4


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  reply	other threads:[~2013-03-11  9:26 UTC|newest]

Thread overview: 22+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2013-03-11  9:26 [PATCH 01/13] ARM: clep7212: Migrate to config-board Alexander Shiyan
2013-03-11  9:26 ` Alexander Shiyan [this message]
2013-03-11  9:26 ` [PATCH 03/13] ARM: clps711x: Replace numeric PLL option with boolean for raise CPU frequency Alexander Shiyan
2013-03-11  9:26 ` [PATCH 04/13] ARM: clps711x: Add clocksource driver Alexander Shiyan
2013-03-11 11:01   ` Jean-Christophe PLAGNIOL-VILLARD
2013-03-11 11:10     ` Sascha Hauer
2013-03-11 16:22       ` Re[2]: " Alexander Shiyan
2013-03-11 18:00         ` Sascha Hauer
2013-03-11 18:17           ` Re[2]: " Alexander Shiyan
2013-03-11  9:26 ` [PATCH 05/13] ARM: clps711x: Using COMMON_CLK Alexander Shiyan
2013-03-11 11:00   ` Jean-Christophe PLAGNIOL-VILLARD
2013-03-11 11:26     ` Re[2]: " Alexander Shiyan
2013-03-11 11:58       ` Jean-Christophe PLAGNIOL-VILLARD
2013-03-11  9:26 ` [PATCH 06/13] Add Generic GPIO driver Alexander Shiyan
2013-03-11  9:26 ` [PATCH 07/13] ARM: clps711x: Add " Alexander Shiyan
2013-03-11  9:26 ` [PATCH 08/13] Add helpers to define resources Alexander Shiyan
2013-03-11  9:26 ` [PATCH 09/13] ARM: clps711x: Migrate to using DEFINE_RES_MEM macro Alexander Shiyan
2013-03-11  9:26 ` [PATCH 10/13] ARM: clps711x: Limit chipselect setup up to CS5 Alexander Shiyan
2013-03-11  9:26 ` [PATCH 11/13] Add system controller register driver (SYSCON) Alexander Shiyan
2013-03-11  9:26 ` [PATCH 12/13] ARM: clps711x: Export system-wide registers through SYSCON driver Alexander Shiyan
2013-03-11  9:26 ` [PATCH 13/13] serial: clps711x: Migrate to using " Alexander Shiyan
2013-03-11 21:18 ` [PATCH 01/13] ARM: clep7212: Migrate to config-board Sascha Hauer

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