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Diffstat (limited to 'arch/arm/mach-pxa/ssp.c')
-rw-r--r--arch/arm/mach-pxa/ssp.c17
1 files changed, 9 insertions, 8 deletions
diff --git a/arch/arm/mach-pxa/ssp.c b/arch/arm/mach-pxa/ssp.c
index a68b30eff4d2..93096befd017 100644
--- a/arch/arm/mach-pxa/ssp.c
+++ b/arch/arm/mach-pxa/ssp.c
@@ -31,6 +31,7 @@
#include <linux/interrupt.h>
#include <linux/ioport.h>
#include <linux/init.h>
+#include <linux/mutex.h>
#include <asm/io.h>
#include <asm/irq.h>
#include <asm/hardware.h>
@@ -59,7 +60,7 @@ static const struct ssp_info_ ssp_info[PXA_SSP_PORTS] = {
#endif
};
-static DECLARE_MUTEX(sem);
+static DEFINE_MUTEX(mutex);
static int use_count[PXA_SSP_PORTS] = {0, 0, 0};
static irqreturn_t ssp_interrupt(int irq, void *dev_id, struct pt_regs *regs)
@@ -239,16 +240,16 @@ int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags)
if (port > PXA_SSP_PORTS || port == 0)
return -ENODEV;
- down(&sem);
+ mutex_lock(&mutex);
if (use_count[port - 1]) {
- up(&sem);
+ mutex_unlock(&mutex);
return -EBUSY;
}
use_count[port - 1]++;
if (!request_mem_region(__PREG(SSCR0_P(port)), 0x2c, "SSP")) {
use_count[port - 1]--;
- up(&sem);
+ mutex_unlock(&mutex);
return -EBUSY;
}
dev->port = port;
@@ -265,13 +266,13 @@ int ssp_init(struct ssp_dev *dev, u32 port, u32 init_flags)
/* turn on SSP port clock */
pxa_set_cken(ssp_info[port-1].clock, 1);
- up(&sem);
+ mutex_unlock(&mutex);
return 0;
out_region:
release_mem_region(__PREG(SSCR0_P(port)), 0x2c);
use_count[port - 1]--;
- up(&sem);
+ mutex_unlock(&mutex);
return ret;
}
@@ -282,7 +283,7 @@ out_region:
*/
void ssp_exit(struct ssp_dev *dev)
{
- down(&sem);
+ mutex_lock(&mutex);
SSCR0_P(dev->port) &= ~SSCR0_SSE;
if (dev->port > PXA_SSP_PORTS || dev->port == 0) {
@@ -295,7 +296,7 @@ void ssp_exit(struct ssp_dev *dev)
free_irq(dev->irq, dev);
release_mem_region(__PREG(SSCR0_P(dev->port)), 0x2c);
use_count[dev->port - 1]--;
- up(&sem);
+ mutex_unlock(&mutex);
}
EXPORT_SYMBOL(ssp_write_word);