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-rw-r--r--arch/powerpc/platforms/powermac/low_i2c.c23
1 files changed, 12 insertions, 11 deletions
diff --git a/arch/powerpc/platforms/powermac/low_i2c.c b/arch/powerpc/platforms/powermac/low_i2c.c
index 3f507ab9c5e5..efdf5eb81ecc 100644
--- a/arch/powerpc/platforms/powermac/low_i2c.c
+++ b/arch/powerpc/platforms/powermac/low_i2c.c
@@ -42,6 +42,7 @@
42#include <linux/interrupt.h> 42#include <linux/interrupt.h>
43#include <linux/completion.h> 43#include <linux/completion.h>
44#include <linux/timer.h> 44#include <linux/timer.h>
45#include <linux/mutex.h>
45#include <asm/keylargo.h> 46#include <asm/keylargo.h>
46#include <asm/uninorth.h> 47#include <asm/uninorth.h>
47#include <asm/io.h> 48#include <asm/io.h>
@@ -84,7 +85,7 @@ struct pmac_i2c_bus
84 void *hostdata; 85 void *hostdata;
85 int channel; /* some hosts have multiple */ 86 int channel; /* some hosts have multiple */
86 int mode; /* current mode */ 87 int mode; /* current mode */
87 struct semaphore sem; 88 struct mutex mutex;
88 int opened; 89 int opened;
89 int polled; /* open mode */ 90 int polled; /* open mode */
90 struct platform_device *platform_dev; 91 struct platform_device *platform_dev;
@@ -104,7 +105,7 @@ static LIST_HEAD(pmac_i2c_busses);
104 105
105struct pmac_i2c_host_kw 106struct pmac_i2c_host_kw
106{ 107{
107 struct semaphore mutex; /* Access mutex for use by 108 struct mutex mutex; /* Access mutex for use by
108 * i2c-keywest */ 109 * i2c-keywest */
109 void __iomem *base; /* register base address */ 110 void __iomem *base; /* register base address */
110 int bsteps; /* register stepping */ 111 int bsteps; /* register stepping */
@@ -375,14 +376,14 @@ static void kw_i2c_timeout(unsigned long data)
375static int kw_i2c_open(struct pmac_i2c_bus *bus) 376static int kw_i2c_open(struct pmac_i2c_bus *bus)
376{ 377{
377 struct pmac_i2c_host_kw *host = bus->hostdata; 378 struct pmac_i2c_host_kw *host = bus->hostdata;
378 down(&host->mutex); 379 mutex_lock(&host->mutex);
379 return 0; 380 return 0;
380} 381}
381 382
382static void kw_i2c_close(struct pmac_i2c_bus *bus) 383static void kw_i2c_close(struct pmac_i2c_bus *bus)
383{ 384{
384 struct pmac_i2c_host_kw *host = bus->hostdata; 385 struct pmac_i2c_host_kw *host = bus->hostdata;
385 up(&host->mutex); 386 mutex_unlock(&host->mutex);
386} 387}
387 388
388static int kw_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize, 389static int kw_i2c_xfer(struct pmac_i2c_bus *bus, u8 addrdir, int subsize,
@@ -498,7 +499,7 @@ static struct pmac_i2c_host_kw *__init kw_i2c_host_init(struct device_node *np)
498 kfree(host); 499 kfree(host);
499 return NULL; 500 return NULL;
500 } 501 }
501 init_MUTEX(&host->mutex); 502 mutex_init(&host->mutex);
502 init_completion(&host->complete); 503 init_completion(&host->complete);
503 spin_lock_init(&host->lock); 504 spin_lock_init(&host->lock);
504 init_timer(&host->timeout_timer); 505 init_timer(&host->timeout_timer);
@@ -571,7 +572,7 @@ static void __init kw_i2c_add(struct pmac_i2c_host_kw *host,
571 bus->open = kw_i2c_open; 572 bus->open = kw_i2c_open;
572 bus->close = kw_i2c_close; 573 bus->close = kw_i2c_close;
573 bus->xfer = kw_i2c_xfer; 574 bus->xfer = kw_i2c_xfer;
574 init_MUTEX(&bus->sem); 575 mutex_init(&bus->mutex);
575 if (controller == busnode) 576 if (controller == busnode)
576 bus->flags = pmac_i2c_multibus; 577 bus->flags = pmac_i2c_multibus;
577 list_add(&bus->link, &pmac_i2c_busses); 578 list_add(&bus->link, &pmac_i2c_busses);
@@ -798,7 +799,7 @@ static void __init pmu_i2c_probe(void)
798 bus->mode = pmac_i2c_mode_std; 799 bus->mode = pmac_i2c_mode_std;
799 bus->hostdata = bus + 1; 800 bus->hostdata = bus + 1;
800 bus->xfer = pmu_i2c_xfer; 801 bus->xfer = pmu_i2c_xfer;
801 init_MUTEX(&bus->sem); 802 mutex_init(&bus->mutex);
802 bus->flags = pmac_i2c_multibus; 803 bus->flags = pmac_i2c_multibus;
803 list_add(&bus->link, &pmac_i2c_busses); 804 list_add(&bus->link, &pmac_i2c_busses);
804 805
@@ -921,7 +922,7 @@ static void __init smu_i2c_probe(void)
921 bus->mode = pmac_i2c_mode_std; 922 bus->mode = pmac_i2c_mode_std;
922 bus->hostdata = bus + 1; 923 bus->hostdata = bus + 1;
923 bus->xfer = smu_i2c_xfer; 924 bus->xfer = smu_i2c_xfer;
924 init_MUTEX(&bus->sem); 925 mutex_init(&bus->mutex);
925 bus->flags = 0; 926 bus->flags = 0;
926 list_add(&bus->link, &pmac_i2c_busses); 927 list_add(&bus->link, &pmac_i2c_busses);
927 928
@@ -1093,13 +1094,13 @@ int pmac_i2c_open(struct pmac_i2c_bus *bus, int polled)
1093{ 1094{
1094 int rc; 1095 int rc;
1095 1096
1096 down(&bus->sem); 1097 mutex_lock(&bus->mutex);
1097 bus->polled = polled || pmac_i2c_force_poll; 1098 bus->polled = polled || pmac_i2c_force_poll;
1098 bus->opened = 1; 1099 bus->opened = 1;
1099 bus->mode = pmac_i2c_mode_std; 1100 bus->mode = pmac_i2c_mode_std;
1100 if (bus->open && (rc = bus->open(bus)) != 0) { 1101 if (bus->open && (rc = bus->open(bus)) != 0) {
1101 bus->opened = 0; 1102 bus->opened = 0;
1102 up(&bus->sem); 1103 mutex_unlock(&bus->mutex);
1103 return rc; 1104 return rc;
1104 } 1105 }
1105 return 0; 1106 return 0;
@@ -1112,7 +1113,7 @@ void pmac_i2c_close(struct pmac_i2c_bus *bus)
1112 if (bus->close) 1113 if (bus->close)
1113 bus->close(bus); 1114 bus->close(bus);
1114 bus->opened = 0; 1115 bus->opened = 0;
1115 up(&bus->sem); 1116 mutex_unlock(&bus->mutex);
1116} 1117}
1117EXPORT_SYMBOL_GPL(pmac_i2c_close); 1118EXPORT_SYMBOL_GPL(pmac_i2c_close);
1118 1119