[patch 30/38] openrisc: Select ARCH_HAS_RANDOM_ENTROPY

The only remaining non-architecture usage of get_cycles() is to provide
random_get_entropy().

Switch openrisc over to the new scheme of selecting ARCH_HAS_RANDOM_ENTROPY
and providing random_get_entropy() in asm/random.h.

Add 'asm/timex.h' includes to the relevant files, so the global include can
be removed once all architectures are converted over.

Signed-off-by: Thomas Gleixner <[email protected]>
Cc: Jonas Bonn <[email protected]>
Cc: [email protected]
---
 arch/openrisc/Kconfig              |    1 +
 arch/openrisc/include/asm/random.h |   12 ++++++++++++
 arch/openrisc/include/asm/timex.h  |    5 -----
 arch/openrisc/lib/delay.c          |    1 +
 4 files changed, 14 insertions(+), 5 deletions(-)

--- a/arch/openrisc/Kconfig
+++ b/arch/openrisc/Kconfig
@@ -10,6 +10,7 @@ config OPENRISC
 	select ARCH_HAS_DELAY_TIMER
 	select ARCH_HAS_DMA_SET_UNCACHED
 	select ARCH_HAS_DMA_CLEAR_UNCACHED
+	select ARCH_HAS_RANDOM_ENTROPY
 	select ARCH_HAS_SYNC_DMA_FOR_DEVICE
 	select GENERIC_BUILTIN_DTB
 	select COMMON_CLK
--- /dev/null
+++ b/arch/openrisc/include/asm/random.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0-or-later */
+#ifndef __ASM_OPENRISC_RANDOM_H
+#define __ASM_OPENRISC_RANDOM_H
+
+#include <asm/timex.h>
+
+static inline unsigned long random_get_entropy(void)
+{
+	return get_cycles();
+}
+
+#endif
--- a/arch/openrisc/include/asm/timex.h
+++ b/arch/openrisc/include/asm/timex.h
@@ -9,13 +9,9 @@
  * OpenRISC implementation:
  * Copyright (C) 2010-2011 Jonas Bonn <[email protected]>
  */
-
 #ifndef __ASM_OPENRISC_TIMEX_H
 #define __ASM_OPENRISC_TIMEX_H
 
-#define get_cycles get_cycles
-
-#include <asm-generic/timex.h>
 #include <asm/spr.h>
 #include <asm/spr_defs.h>
 
@@ -23,6 +19,5 @@ static inline cycles_t get_cycles(void)
 {
 	return mfspr(SPR_TTCR);
 }
-#define get_cycles get_cycles
 
 #endif
--- a/arch/openrisc/lib/delay.c
+++ b/arch/openrisc/lib/delay.c
@@ -18,6 +18,7 @@
 #include <linux/init.h>
 
 #include <asm/param.h>
+#include <asm/timex.h>
 #include <asm/processor.h>
 
 bool delay_read_timer(unsigned long *timer_value)