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| author | Benoît Thébaudeau <benoit.thebaudeau@advansee.com> | 2012-08-14 10:32:54 +0000 |
|---|---|---|
| committer | Stefano Babic <sbabic@denx.de> | 2012-09-06 11:04:41 +0200 |
| commit | e7619554173a9d9f72dc19f97a804afea135f07f (patch) | |
| tree | d6aa05579f294e0dffc65e05b12792adf5900bf7 /arch/arm/cpu/arm1136 | |
| parent | 0d7d3830984012a8209bbf497f92add652082afb (diff) | |
| download | u-boot-imx-e7619554173a9d9f72dc19f97a804afea135f07f.zip u-boot-imx-e7619554173a9d9f72dc19f97a804afea135f07f.tar.gz u-boot-imx-e7619554173a9d9f72dc19f97a804afea135f07f.tar.bz2 | |
mx35: Fix 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/arm1136')
| -rw-r--r-- | arch/arm/cpu/arm1136/mx35/generic.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/arch/arm/cpu/arm1136/mx35/generic.c b/arch/arm/cpu/arm1136/mx35/generic.c index d435e8a..de7503c 100644 --- a/arch/arm/cpu/arm1136/mx35/generic.c +++ b/arch/arm/cpu/arm1136/mx35/generic.c @@ -24,6 +24,7 @@ */ #include <common.h> +#include <div64.h> #include <asm/io.h> #include <asm/errno.h> #include <asm/arch/imx-regs.h> @@ -129,15 +130,17 @@ static int get_ahb_div(u32 pdr0) static u32 decode_pll(u32 reg, u32 infreq) { u32 mfi = (reg >> 10) & 0xf; - u32 mfn = reg & 0x3f; - u32 mfd = (reg >> 16) & 0x3f; + s32 mfn = reg & 0x3ff; + u32 mfd = (reg >> 16) & 0x3ff; u32 pd = (reg >> 26) & 0xf; mfi = mfi <= 5 ? 5 : mfi; + mfn = mfn >= 512 ? mfn - 1024 : mfn; mfd += 1; pd += 1; - return ((2 * (infreq / 1000) * (mfi * mfd + mfn)) / (mfd * pd)) * 1000; + return lldiv(2 * (u64)infreq * (mfi * mfd + mfn), + mfd * pd); } static u32 get_mcu_main_clk(void) |