omap mailbox: convert sequence bit checking to module paramter
Signed-off-by: Hiroshi DOYU <Hiroshi.DOYU@nokia.com>
diff --git a/arch/arm/plat-omap/mailbox.c b/arch/arm/plat-omap/mailbox.c
index fcac60d..10f2405 100644
--- a/arch/arm/plat-omap/mailbox.c
+++ b/arch/arm/plat-omap/mailbox.c
@@ -32,30 +32,34 @@
#include <linux/io.h>
#include <mach/mailbox.h>
+static int enable_seq_bit;
+module_param(enable_seq_bit, bool, 0);
+MODULE_PARM_DESC(enable_seq_bit, "Enable sequence bit checking.");
+
static struct omap_mbox *mboxes;
static DEFINE_RWLOCK(mboxes_lock);
/*
* Mailbox sequence bit API
*/
-#if defined(CONFIG_ARCH_OMAP1)
-# define MBOX_USE_SEQ_BIT
-#elif defined(CONFIG_ARCH_OMAP2)
-# define MBOX_USE_SEQ_BIT
-#endif
-#ifdef MBOX_USE_SEQ_BIT
/* seq_rcv should be initialized with any value other than
* 0 and 1 << 31, to allow either value for the first
* message. */
static inline void mbox_seq_init(struct omap_mbox *mbox)
{
+ if (!enable_seq_bit)
+ return;
+
/* any value other than 0 and 1 << 31 */
mbox->seq_rcv = 0xffffffff;
}
static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
{
+ if (!enable_seq_bit)
+ return;
+
/* add seq_snd to msg */
*msg = (*msg & 0x7fffffff) | mbox->seq_snd;
/* flip seq_snd */
@@ -64,24 +68,17 @@
static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
{
- mbox_msg_t seq = msg & (1 << 31);
+ mbox_msg_t seq;
+
+ if (!enable_seq_bit)
+ return 0;
+
+ seq = msg & (1 << 31);
if (seq == mbox->seq_rcv)
return -1;
mbox->seq_rcv = seq;
return 0;
}
-#else
-static inline void mbox_seq_init(struct omap_mbox *mbox)
-{
-}
-static inline void mbox_seq_toggle(struct omap_mbox *mbox, mbox_msg_t * msg)
-{
-}
-static inline int mbox_seq_test(struct omap_mbox *mbox, mbox_msg_t msg)
-{
- return 0;
-}
-#endif
/* Mailbox FIFO handle functions */
static inline mbox_msg_t mbox_fifo_read(struct omap_mbox *mbox)