diff options
| author | Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | 2012-08-14 08:43:47 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2012-09-06 11:07:52 +0200 |
| commit | 697191d57fb2fae7b31cec9581fb7749f965d877 (patch) | |
| tree | d0ddce63862fe82ddc9b54583ac96fa2102fd1bd /arch/arm/cpu | |
| parent | 543d247935f544acdd16f6dc136b8b8ceca2c2a5 (diff) | |
| download | u-boot-imx-697191d57fb2fae7b31cec9581fb7749f965d877.zip u-boot-imx-697191d57fb2fae7b31cec9581fb7749f965d877.tar.gz u-boot-imx-697191d57fb2fae7b31cec9581fb7749f965d877.tar.bz2 | |
Fix mx31_decode_pll
The MFN bit-field of the PLL registers represents a signed value. See the
reference manual.
Signed-off-by: Benoît Thébaudeau <benoit.thebaudeau@advansee.com>
Cc: Stefano Babic <sbabic@denx.de>
Diffstat (limited to 'arch/arm/cpu')
| -rw-r--r-- | arch/arm/cpu/arm1136/mx31/generic.c | 8 |
1 files changed, 5 insertions, 3 deletions
diff --git a/arch/arm/cpu/arm1136/mx31/generic.c b/arch/arm/cpu/arm1136/mx31/generic.c index 8873fb7..3a35bfa 100644 --- a/arch/arm/cpu/arm1136/mx31/generic.c +++ b/arch/arm/cpu/arm1136/mx31/generic.c @@ -22,6 +22,7 @@ */ #include <common.h> +#include <div64.h> #include <asm/arch/imx-regs.h> #include <asm/arch/clock.h> #include <asm/io.h> @@ -30,16 +31,17 @@ static u32 mx31_decode_pll(u32 reg, u32 infreq) { u32 mfi = GET_PLL_MFI(reg); - u32 mfn = GET_PLL_MFN(reg); + s32 mfn = GET_PLL_MFN(reg); u32 mfd = GET_PLL_MFD(reg); u32 pd = GET_PLL_PD(reg); mfi = mfi <= 5 ? 5 : mfi; + mfn = mfn >= 512 ? mfn - 1024 : mfn; mfd += 1; pd += 1; - return ((2 * (infreq >> 10) * (mfi * mfd + mfn)) / - (mfd * pd)) << 10; + return lldiv(2 * (u64)infreq * (mfi * mfd + mfn), + mfd * pd); } static u32 mx31_get_mpl_dpdgck_clk(void) |