From: "Benoît Thébaudeau" <benoit.thebaudeau@advansee.com>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 1/7] mx25: Fix decode_pll
Date: Thu, 27 Sep 2012 22:26:54 +0200 (CEST) [thread overview]
Message-ID: <354965566.5372561.1348777614543.JavaMail.root@advansee.com> (raw)
The MFN bit-field of the PLL registers represents a signed value. See the
reference manual.
Signed-off-by: Beno?t Th?baudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
---
.../arch/arm/cpu/arm926ejs/mx25/generic.c | 9 ++++++---
1 file changed, 6 insertions(+), 3 deletions(-)
diff --git u-boot-imx-e1eb75b.orig/arch/arm/cpu/arm926ejs/mx25/generic.c u-boot-imx-e1eb75b/arch/arm/cpu/arm926ejs/mx25/generic.c
index 90e584a..2283a89 100644
--- u-boot-imx-e1eb75b.orig/arch/arm/cpu/arm926ejs/mx25/generic.c
+++ u-boot-imx-e1eb75b/arch/arm/cpu/arm926ejs/mx25/generic.c
@@ -48,7 +48,7 @@ static unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref)
{
unsigned int mfi = (pll >> CCM_PLL_MFI_SHIFT)
& CCM_PLL_MFI_MASK;
- unsigned int mfn = (pll >> CCM_PLL_MFN_SHIFT)
+ int mfn = (pll >> CCM_PLL_MFN_SHIFT)
& CCM_PLL_MFN_MASK;
unsigned int mfd = (pll >> CCM_PLL_MFD_SHIFT)
& CCM_PLL_MFD_MASK;
@@ -56,9 +56,12 @@ static unsigned int imx_decode_pll(unsigned int pll, unsigned int f_ref)
& CCM_PLL_PD_MASK;
mfi = mfi <= 5 ? 5 : mfi;
+ mfn = mfn >= 512 ? mfn - 1024 : mfn;
+ mfd += 1;
+ pd += 1;
- return lldiv(2 * (u64) f_ref * (mfi * (mfd + 1) + mfn),
- (mfd + 1) * (pd + 1));
+ return lldiv(2 * (u64) f_ref * (mfi * mfd + mfn),
+ mfd * pd);
}
static ulong imx_get_mpllclk(void)
next reply other threads:[~2012-09-27 20:26 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-09-27 20:26 Benoît Thébaudeau [this message]
2012-09-27 20:27 ` [U-Boot] [PATCH 2/7] mx25: Clean up clock calculations Benoît Thébaudeau
2012-09-27 20:27 ` [U-Boot] [PATCH 3/7] mx25: Define more standard clocks Benoît Thébaudeau
2012-09-27 20:27 ` [U-Boot] [PATCH 4/7] mx25 clocks: Fix MXC_FEC_CLK Benoît Thébaudeau
2012-09-28 10:33 ` Stefano Babic
2012-09-27 20:27 ` [U-Boot] [PATCH 5/7] mx25: Clean up clocks API Benoît Thébaudeau
2012-09-28 10:31 ` Stefano Babic
2012-09-27 20:28 ` [U-Boot] [PATCH 6/7] mx25: Define cpu_eth_init() only if needed Benoît Thébaudeau
2012-09-27 20:55 ` Fabio Estevam
2012-09-27 21:43 ` Benoît Thébaudeau
2012-09-28 9:09 ` Stefano Babic
2012-09-27 20:28 ` [U-Boot] [PATCH 7/7] mx25: Fix eSDHC support Benoît Thébaudeau
2012-09-30 10:26 ` [U-Boot] [PATCH 1/7] mx25: Fix decode_pll Stefano Babic
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