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authorSascha Hauer <s.hauer@pengutronix.de>2009-06-03 11:22:32 +0200
committerSascha Hauer <s.hauer@pengutronix.de>2009-08-07 12:11:10 +0200
commit6d73665f052a8dadf6f33dfd2546e15199ad7c5f (patch)
tree8ab68874fbbfb7d1d46358daf4a5fa191c543978 /arch/arm/plat-mxc/clock.c
parent5ef881bbecc72862fa379cb286a50f2781db4cec (diff)
downloadlinux-6d73665f052a8dadf6f33dfd2546e15199ad7c5f.tar.bz2
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.c16
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;