[U-Boot] [PATCH V2 2/3] lib: rand: add call to hw_rand() - hardware random number generator

[Przemyslaw Marczak]

Changes:
- lib/rand.c: add call to hw_rand() (depends on CONFIG_RAND_HW_ACCEL)
- include/common.h: add hw_rand() declaration.

Signed-off-by: Przemyslaw Marczak <p.marczak at samsung.com>
cc: Michael Walle <michael at walle.cc>
cc: Tom Rini <trini at ti.com>
---
Changes v2:
- move function hw_rand() from rand() to rand_r() and ignore its argument

 include/common.h |    3 +++
 lib/rand.c       |    3 +++
 2 files changed, 6 insertions(+)

diff --git a/include/common.h b/include/common.h
index 96a45a6..58e2fbc 100644
--- a/include/common.h
+++ b/include/common.h
@@ -836,6 +836,9 @@ void srand(unsigned int seed);
 unsigned int rand(void);
 unsigned int rand_r(unsigned int *seedp);
 #endif
+#ifdef CONFIG_RAND_HW_ACCEL
+unsigned int hw_rand(void);
+#endif
 
 /* common/console.c */
 int	console_init_f(void);	/* Before relocation; uses the serial  stuff	*/
diff --git a/lib/rand.c b/lib/rand.c
index 5c367e1..0617063 100644
--- a/lib/rand.c
+++ b/lib/rand.c
@@ -14,6 +14,9 @@ static unsigned int y = 1U;
 
 unsigned int rand_r(unsigned int *seedp)
 {
+#ifdef CONFIG_RAND_HW_ACCEL
+	return hw_rand();
+#endif
 	*seedp ^= (*seedp << 13);
 	*seedp ^= (*seedp >> 17);
 	*seedp ^= (*seedp << 5);
-- 
1.7.9.5