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| author | Sascha Hauer <s.hauer@pengutronix.de> | 2009-06-03 11:22:32 +0200 |
|---|---|---|
| committer | Sascha Hauer <s.hauer@pengutronix.de> | 2009-08-07 12:11:10 +0200 |
| commit | 6d73665f052a8dadf6f33dfd2546e15199ad7c5f (patch) | |
| tree | 8ab68874fbbfb7d1d46358daf4a5fa191c543978 /arch/arm/plat-mxc/clock.c | |
| parent | MXC: pwm driver fixes (diff) | |
| download | linux-6d73665f052a8dadf6f33dfd2546e15199ad7c5f.tar.xz linux-6d73665f052a8dadf6f33dfd2546e15199ad7c5f.zip | |
MXC PLL decoding: calculate mfn value with less magic
Also, use cpu_is_* macros rather than CONFIG_ARCH_*
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
Diffstat (limited to 'arch/arm/plat-mxc/clock.c')
| -rw-r--r-- | arch/arm/plat-mxc/clock.c | 16 |
1 files changed, 9 insertions, 7 deletions
diff --git a/arch/arm/plat-mxc/clock.c b/arch/arm/plat-mxc/clock.c index 92e13566cd4f..f653213b7416 100644 --- a/arch/arm/plat-mxc/clock.c +++ b/arch/arm/plat-mxc/clock.c @@ -39,6 +39,7 @@ #include <linux/string.h> #include <mach/clock.h> +#include <mach/hardware.h> static LIST_HEAD(clocks); static DEFINE_MUTEX(clocks_mutex); @@ -363,12 +364,11 @@ unsigned long mxc_decode_pll(unsigned int reg_val, u32 freq) mfn_abs = mfn; -#if !defined CONFIG_ARCH_MX1 && !defined CONFIG_ARCH_MX21 - if (mfn >= 0x200) { - mfn |= 0xFFFFFE00; - mfn_abs = -mfn; - } -#endif + /* On all i.MXs except i.MX1 and i.MX21 mfn is a 10bit + * 2's complements number + */ + if (!cpu_is_mx1() && !cpu_is_mx21() && mfn >= 0x200) + mfn_abs = 0x400 - mfn; freq *= 2; freq /= pd + 1; @@ -376,8 +376,10 @@ unsigned long mxc_decode_pll(unsigned int reg_val, u32 freq) ll = (unsigned long long)freq * mfn_abs; do_div(ll, mfd + 1); - if (mfn < 0) + + if (!cpu_is_mx1() && !cpu_is_mx21() && mfn >= 0x200) ll = -ll; + ll = (freq * mfi) + ll; return ll; |