hwmon: (adt7473) Fix voltage conversion routines

[linux-2.6-omap-h63xx.git] / include / asm-xtensa / bitops.h

diff --git a/include/asm-xtensa/bitops.h b/include/asm-xtensa/bitops.h
index d815649617aadb0701dee98672dd53661d9bb7d2..23261e8f2e5ac4c15cf36a23921f3cd9cb654b5f 100644 (file)
--- a/include/asm-xtensa/bitops.h
+++ b/include/asm-xtensa/bitops.h
@@ -7,7 +7,7 @@
  * License.  See the file "COPYING" in the main directory of this archive
  * for more details.
  *
- * Copyright (C) 2001 - 2005 Tensilica Inc.
+ * Copyright (C) 2001 - 2007 Tensilica Inc.
  */
 
 #ifndef _XTENSA_BITOPS_H
@@ -15,6 +15,10 @@
 
 #ifdef __KERNEL__
 
+#ifndef _LINUX_BITOPS_H
+#error only <linux/bitops.h> can be included directly
+#endif
+
 #include <asm/processor.h>
 #include <asm/byteorder.h>
 #include <asm/system.h>
@@ -31,53 +35,30 @@
 
 #if XCHAL_HAVE_NSA
 
-static __inline__ int __cntlz (unsigned long x)
+static inline unsigned long __cntlz (unsigned long x)
 {
        int lz;
        asm ("nsau %0, %1" : "=r" (lz) : "r" (x));
-       return 31 - lz;
-}
-
-#else
-
-static __inline__ int __cntlz (unsigned long x)
-{
-       unsigned long sum, x1, x2, x4, x8, x16;
-       x1  = x & 0xAAAAAAAA;
-       x2  = x & 0xCCCCCCCC;
-       x4  = x & 0xF0F0F0F0;
-       x8  = x & 0xFF00FF00;
-       x16 = x & 0xFFFF0000;
-       sum = x2 ? 2 : 0;
-       sum += (x16 != 0) * 16;
-       sum += (x8 != 0) * 8;
-       sum += (x4 != 0) * 4;
-       sum += (x1 != 0);
-
-       return sum;
+       return lz;
 }
 
-#endif
-
 /*
  * ffz: Find first zero in word. Undefined if no zero exists.
  * bit 0 is the LSB of addr; bit 32 is the LSB of (addr+1).
  */
 
-static __inline__ int ffz(unsigned long x)
+static inline int ffz(unsigned long x)
 {
-       if ((x = ~x) == 0)
-               return 32;
-       return __cntlz(x & -x);
+       return 31 - __cntlz(~x & -~x);
 }
 
 /*
  * __ffs: Find first bit set in word. Return 0 for bit 0
  */
 
-static __inline__ int __ffs(unsigned long x)
+static inline int __ffs(unsigned long x)
 {
-       return __cntlz(x & -x);
+       return 31 - __cntlz(x & -x);
 }
 
 /*
@@ -86,9 +67,9 @@ static __inline__ int __ffs(unsigned long x)
  * differs in spirit from the above ffz (man ffs).
  */
 
-static __inline__ int ffs(unsigned long x)
+static inline int ffs(unsigned long x)
 {
-       return __cntlz(x & -x) + 1;
+       return 32 - __cntlz(x & -x);
 }
 
 /*
@@ -96,25 +77,42 @@ static __inline__ int ffs(unsigned long x)
  * Note fls(0) = 0, fls(1) = 1, fls(0x80000000) = 32.
  */
 
-static __inline__ int fls (unsigned int x)
+static inline int fls (unsigned int x)
 {
-       return __cntlz(x);
+       return 32 - __cntlz(x);
 }
+
+#else
+
+/* Use the generic implementation if we don't have the nsa/nsau instructions. */
+
+# include <asm-generic/bitops/ffs.h>
+# include <asm-generic/bitops/__ffs.h>
+# include <asm-generic/bitops/ffz.h>
+# include <asm-generic/bitops/fls.h>
+
+#endif
+
 #include <asm-generic/bitops/fls64.h>
 #include <asm-generic/bitops/find.h>
 #include <asm-generic/bitops/ext2-non-atomic.h>
 
 #ifdef __XTENSA_EL__
-# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr),(addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr),(addr))
+# define ext2_set_bit_atomic(lock,nr,addr)                             \
+       test_and_set_bit((nr), (unsigned long*)(addr))
+# define ext2_clear_bit_atomic(lock,nr,addr)                           \
+       test_and_clear_bit((nr), (unsigned long*)(addr))
 #elif defined(__XTENSA_EB__)
-# define ext2_set_bit_atomic(lock,nr,addr) test_and_set_bit((nr) ^ 0x18, (addr))
-# define ext2_clear_bit_atomic(lock,nr,addr) test_and_clear_bit((nr)^0x18,(addr))
+# define ext2_set_bit_atomic(lock,nr,addr)                             \
+       test_and_set_bit((nr) ^ 0x18, (unsigned long*)(addr))
+# define ext2_clear_bit_atomic(lock,nr,addr)                           \
+       test_and_clear_bit((nr) ^ 0x18, (unsigned long*)(addr))
 #else
 # error processor byte order undefined!
 #endif
 
 #include <asm-generic/bitops/hweight.h>
+#include <asm-generic/bitops/lock.h>
 #include <asm-generic/bitops/sched.h>
 #include <asm-generic/bitops/minix.h>