1 /* SPDX-License-Identifier: GPL-2.0 */ 1
2 #ifndef __ASM_GENERIC_DELAY_H
3 #define __ASM_GENERIC_DELAY_H
4
5 /* Undefined functions to get compile-time err
6 extern void __bad_udelay(void);
7 extern void __bad_ndelay(void);
8
9 extern void __udelay(unsigned long usecs);
10 extern void __ndelay(unsigned long nsecs);
11 extern void __const_udelay(unsigned long xloop
12 extern void __delay(unsigned long loops);
13
14 /*
15 * The weird n/20000 thing suppresses a "compa
16 * limited range of data type" warning with no
17 */
18
19 /* 0x10c7 is 2**32 / 1000000 (rounded up) */
20 #define udelay(n)
21 ({
22 if (__builtin_constant_p(n)) {
23 if ((n) / 20000 >= 1)
24 __bad_udelay(
25 else
26 __const_udelay
27 } else {
28 __udelay(n);
29 }
30 })
31
32 /* 0x5 is 2**32 / 1000000000 (rounded up) */
33 #define ndelay(n)
34 ({
35 if (__builtin_constant_p(n)) {
36 if ((n) / 20000 >= 1)
37 __bad_ndelay()
38 else
39 __const_udelay
40 } else {
41 __ndelay(n);
42 }
43 })
44
45 #endif /* __ASM_GENERIC_DELAY_H */
46
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