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From: s.hauer@pengutronix.de (Sascha Hauer)
To: linux-arm-kernel@lists.infradead.org
Subject: [PATCH 2/2] i.MX35: remove get_3_3_div helper function
Date: Fri, 23 Apr 2010 09:40:26 +0200	[thread overview]
Message-ID: <1272008426-14435-3-git-send-email-s.hauer@pengutronix.de> (raw)
In-Reply-To: <1272008426-14435-1-git-send-email-s.hauer@pengutronix.de>

In the v2 reference manual there are no dividers combined of two
dividers. Instead, all dividers are simple 6bit dividers. I assume
the combined dividers only exist in preliminary hardware.

Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
---
 arch/arm/mach-mx3/clock-imx35.c |   13 ++++---------
 1 files changed, 4 insertions(+), 9 deletions(-)

diff --git a/arch/arm/mach-mx3/clock-imx35.c b/arch/arm/mach-mx3/clock-imx35.c
index 5c87338..c6ef64e 100644
--- a/arch/arm/mach-mx3/clock-imx35.c
+++ b/arch/arm/mach-mx3/clock-imx35.c
@@ -178,16 +178,11 @@ static unsigned long get_rate_ipg(struct clk *clk)
 	return get_rate_ahb(NULL) >> 1;
 }
 
-static unsigned long get_3_3_div(unsigned long in)
-{
-	return (((in >> 3) & 0x7) + 1) * ((in & 0x7) + 1);
-}
-
 static unsigned long get_rate_uart(struct clk *clk)
 {
 	unsigned long pdr3 = __raw_readl(CCM_BASE + CCM_PDR3);
 	unsigned long pdr4 = __raw_readl(CCM_BASE + CCM_PDR4);
-	unsigned long div = get_3_3_div(pdr4 >> 10);
+	unsigned long div = ((pdr4 >> 10) & 0x3f) + 1;
 
 	if (pdr3 & (1 << 14))
 		return get_rate_arm() / div;
@@ -218,7 +213,7 @@ static unsigned long get_rate_sdhc(struct clk *clk)
 		break;
 	}
 
-	return rate / get_3_3_div(div);
+	return rate / (div + 1);
 }
 
 static unsigned long get_rate_mshc(struct clk *clk)
@@ -272,7 +267,7 @@ static unsigned long get_rate_csi(struct clk *clk)
 	else
 		rate = get_rate_ppll();
 
-	return rate / get_3_3_div((pdr2 >> 16) & 0x3f);
+	return rate / (((pdr2 >> 16) & 0x3f) + 1);
 }
 
 static unsigned long get_rate_otg(struct clk *clk)
@@ -285,7 +280,7 @@ static unsigned long get_rate_otg(struct clk *clk)
 	else
 		rate = get_rate_ppll();
 
-	return rate / get_3_3_div((pdr4 >> 22) & 0x3f);
+	return rate / (((pdr4 >> 22) & 0x3f) + 1);
 }
 
 static unsigned long get_rate_ipg_per(struct clk *clk)
-- 
1.7.0

  parent reply	other threads:[~2010-04-23  7:40 UTC|newest]

Thread overview: 6+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-04-23  7:40 i.MX35 Clock patches Sascha Hauer
2010-04-23  7:40 ` [PATCH 1/2] i.MX35: Fix arm/ahb clock calculation Sascha Hauer
2010-04-23  7:40 ` Sascha Hauer [this message]
2010-04-23 10:12   ` [PATCH 2/2] i.MX35: remove get_3_3_div helper function Sergei Shtylyov
2010-04-23 12:38     ` Sascha Hauer
2010-04-23 13:20       ` Sergei Shtylyov

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