Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/ohad/hwspinlock:
  hwspinlock: add MAINTAINERS entries
  hwspinlock/omap: omap_hwspinlock_remove should be __devexit
  hwspinlock/u8500: add hwspinlock driver
  hwspinlock/core: register a bank of hwspinlocks in a single API call
  hwspinlock/core: remove stubs for register/unregister
  hwspinlock/core: use a mutex to protect the radix tree
  hwspinlock/core/omap: fix id issues on multiple hwspinlock devices
  hwspinlock/omap: simplify allocation scheme
  hwspinlock/core: simplify 'owner' handling
  hwspinlock/core: simplify Kconfig

Fix up trivial conflicts (addition of omap_hwspinlock_pdata, removal of
omap_spinlock_latency) in arch/arm/mach-omap2/hwspinlock.c

Also, do an "evil merge" to fix a compile error in omap_hsmmc.c which
for some reason was reported in the same email thread as the "please
pull hwspinlock changes".

7 files changed, 416 insertions, 183 deletions

diff --git a/drivers/hwspinlock/Kconfig b/drivers/hwspinlock/Kconfig
index 1f29bab6b3e..c7c3128393d 100644
--- a/drivers/hwspinlock/Kconfig
+++ b/drivers/hwspinlock/Kconfig
@@ -2,22 +2,31 @@
 # Generic HWSPINLOCK framework
 #
 
+# HWSPINLOCK always gets selected by whoever wants it.
 config HWSPINLOCK
-        tristate "Generic Hardware Spinlock framework"
-        depends on ARCH_OMAP4
-        help
-          Say y here to support the generic hardware spinlock framework.
-          You only need to enable this if you have hardware spinlock module
-          on your system (usually only relevant if your system has remote slave
-          coprocessors).
+        tristate
 
-          If unsure, say N.
+menu "Hardware Spinlock drivers"
 
 config HWSPINLOCK_OMAP
         tristate "OMAP Hardware Spinlock device"
-        depends on HWSPINLOCK && ARCH_OMAP4
+        depends on ARCH_OMAP4
+        select HWSPINLOCK
         help
           Say y here to support the OMAP Hardware Spinlock device (firstly
           introduced in OMAP4).
 
           If unsure, say N.
+
+config HSEM_U8500
+        tristate "STE Hardware Semaphore functionality"
+        depends on ARCH_U8500
+        select HWSPINLOCK
+        help
+          Say y here to support the STE Hardware Semaphore functionality, which
+          provides a synchronisation mechanism for the various processor on the
+          SoC.
+
+          If unsure, say N.
+
+endmenu
diff --git a/drivers/hwspinlock/Makefile b/drivers/hwspinlock/Makefile
index 5729a3f7ed3..93eb64b6648 100644
--- a/drivers/hwspinlock/Makefile
+++ b/drivers/hwspinlock/Makefile
@@ -4,3 +4,4 @@
 
 obj-$(CONFIG_HWSPINLOCK)                += hwspinlock_core.o
 obj-$(CONFIG_HWSPINLOCK_OMAP)           += omap_hwspinlock.o
+obj-$(CONFIG_HSEM_U8500)                += u8500_hsem.o
diff --git a/drivers/hwspinlock/hwspinlock_core.c b/drivers/hwspinlock/hwspinlock_core.c
index 43a62714b4f..61c9cf15fa5 100644
--- a/drivers/hwspinlock/hwspinlock_core.c
+++ b/drivers/hwspinlock/hwspinlock_core.c
@@ -26,6 +26,7 @@
 #include <linux/radix-tree.h>
 #include <linux/hwspinlock.h>
 #include <linux/pm_runtime.h>
+#include <linux/mutex.h>
 
 #include "hwspinlock_internal.h"
 
@@ -52,10 +53,12 @@
 static RADIX_TREE(hwspinlock_tree, GFP_KERNEL);
 
 /*
- * Synchronization of access to the tree is achieved using this spinlock,
+ * Synchronization of access to the tree is achieved using this mutex,
  * as the radix-tree API requires that users provide all synchronisation.
+ * A mutex is needed because we're using non-atomic radix tree allocations.
  */
-static DEFINE_SPINLOCK(hwspinlock_tree_lock);
+static DEFINE_MUTEX(hwspinlock_tree_lock);
+
 
 /**
  * __hwspin_trylock() - attempt to lock a specific hwspinlock
@@ -114,7 +117,7 @@ int __hwspin_trylock(struct hwspinlock *hwlock, int mode, unsigned long *flags)
                 return -EBUSY;
 
         /* try to take the hwspinlock device */
-        ret = hwlock->ops->trylock(hwlock);
+        ret = hwlock->bank->ops->trylock(hwlock);
 
         /* if hwlock is already taken, undo spin_trylock_* and exit */
         if (!ret) {
@@ -196,8 +199,8 @@ int __hwspin_lock_timeout(struct hwspinlock *hwlock, unsigned int to,
                  * Allow platform-specific relax handlers to prevent
                  * hogging the interconnect (no sleeping, though)
                  */
-                if (hwlock->ops->relax)
-                        hwlock->ops->relax(hwlock);
+                if (hwlock->bank->ops->relax)
+                        hwlock->bank->ops->relax(hwlock);
         }
 
         return ret;
@@ -242,7 +245,7 @@ void __hwspin_unlock(struct hwspinlock *hwlock, int mode, unsigned long *flags)
          */
         mb();
 
-        hwlock->ops->unlock(hwlock);
+        hwlock->bank->ops->unlock(hwlock);
 
         /* Undo the spin_trylock{_irq, _irqsave} called while locking */
         if (mode == HWLOCK_IRQSTATE)
@@ -254,68 +257,37 @@ void __hwspin_unlock(struct hwspinlock *hwlock, int mode, unsigned long *flags)
 }
 EXPORT_SYMBOL_GPL(__hwspin_unlock);
 
-/**
- * hwspin_lock_register() - register a new hw spinlock
- * @hwlock: hwspinlock to register.
- *
- * This function should be called from the underlying platform-specific
- * implementation, to register a new hwspinlock instance.
- *
- * Can be called from an atomic context (will not sleep) but not from
- * within interrupt context.
- *
- * Returns 0 on success, or an appropriate error code on failure
- */
-int hwspin_lock_register(struct hwspinlock *hwlock)
+static int hwspin_lock_register_single(struct hwspinlock *hwlock, int id)
 {
         struct hwspinlock *tmp;
         int ret;
 
-        if (!hwlock || !hwlock->ops ||
-                !hwlock->ops->trylock || !hwlock->ops->unlock) {
-                pr_err("invalid parameters\n");
-                return -EINVAL;
-        }
-
-        spin_lock_init(&hwlock->lock);
-
-        spin_lock(&hwspinlock_tree_lock);
+        mutex_lock(&hwspinlock_tree_lock);
 
-        ret = radix_tree_insert(&hwspinlock_tree, hwlock->id, hwlock);
-        if (ret)
+        ret = radix_tree_insert(&hwspinlock_tree, id, hwlock);
+        if (ret) {
+                if (ret == -EEXIST)
+                        pr_err("hwspinlock id %d already exists!\n", id);
                 goto out;
+        }
 
         /* mark this hwspinlock as available */
-        tmp = radix_tree_tag_set(&hwspinlock_tree, hwlock->id,
-                                                        HWSPINLOCK_UNUSED);
+        tmp = radix_tree_tag_set(&hwspinlock_tree, id, HWSPINLOCK_UNUSED);
 
         /* self-sanity check which should never fail */
         WARN_ON(tmp != hwlock);
 
 out:
-        spin_unlock(&hwspinlock_tree_lock);
-        return ret;
+        mutex_unlock(&hwspinlock_tree_lock);
+        return 0;
 }
-EXPORT_SYMBOL_GPL(hwspin_lock_register);
 
-/**
- * hwspin_lock_unregister() - unregister an hw spinlock
- * @id: index of the specific hwspinlock to unregister
- *
- * This function should be called from the underlying platform-specific
- * implementation, to unregister an existing (and unused) hwspinlock.
- *
- * Can be called from an atomic context (will not sleep) but not from
- * within interrupt context.
- *
- * Returns the address of hwspinlock @id on success, or NULL on failure
- */
-struct hwspinlock *hwspin_lock_unregister(unsigned int id)
+static struct hwspinlock *hwspin_lock_unregister_single(unsigned int id)
 {
         struct hwspinlock *hwlock = NULL;
         int ret;
 
-        spin_lock(&hwspinlock_tree_lock);
+        mutex_lock(&hwspinlock_tree_lock);
 
         /* make sure the hwspinlock is not in use (tag is set) */
         ret = radix_tree_tag_get(&hwspinlock_tree, id, HWSPINLOCK_UNUSED);
@@ -331,9 +303,91 @@ struct hwspinlock *hwspin_lock_unregister(unsigned int id)
         }
 
 out:
-        spin_unlock(&hwspinlock_tree_lock);
+        mutex_unlock(&hwspinlock_tree_lock);
         return hwlock;
 }
+
+/**
+ * hwspin_lock_register() - register a new hw spinlock device
+ * @bank: the hwspinlock device, which usually provides numerous hw locks
+ * @dev: the backing device
+ * @ops: hwspinlock handlers for this device
+ * @base_id: id of the first hardware spinlock in this bank
+ * @num_locks: number of hwspinlocks provided by this device
+ *
+ * This function should be called from the underlying platform-specific
+ * implementation, to register a new hwspinlock device instance.
+ *
+ * Should be called from a process context (might sleep)
+ *
+ * Returns 0 on success, or an appropriate error code on failure
+ */
+int hwspin_lock_register(struct hwspinlock_device *bank, struct device *dev,
+                const struct hwspinlock_ops *ops, int base_id, int num_locks)
+{
+        struct hwspinlock *hwlock;
+        int ret = 0, i;
+
+        if (!bank || !ops || !dev || !num_locks || !ops->trylock ||
+                                                        !ops->unlock) {
+                pr_err("invalid parameters\n");
+                return -EINVAL;
+        }
+
+        bank->dev = dev;
+        bank->ops = ops;
+        bank->base_id = base_id;
+        bank->num_locks = num_locks;
+
+        for (i = 0; i < num_locks; i++) {
+                hwlock = &bank->lock[i];
+
+                spin_lock_init(&hwlock->lock);
+                hwlock->bank = bank;
+
+                ret = hwspin_lock_register_single(hwlock, i);
+                if (ret)
+                        goto reg_failed;
+        }
+
+        return 0;
+
+reg_failed:
+        while (--i >= 0)
+                hwspin_lock_unregister_single(i);
+        return ret;
+}
+EXPORT_SYMBOL_GPL(hwspin_lock_register);
+
+/**
+ * hwspin_lock_unregister() - unregister an hw spinlock device
+ * @bank: the hwspinlock device, which usually provides numerous hw locks
+ *
+ * This function should be called from the underlying platform-specific
+ * implementation, to unregister an existing (and unused) hwspinlock.
+ *
+ * Should be called from a process context (might sleep)
+ *
+ * Returns 0 on success, or an appropriate error code on failure
+ */
+int hwspin_lock_unregister(struct hwspinlock_device *bank)
+{
+        struct hwspinlock *hwlock, *tmp;
+        int i;
+
+        for (i = 0; i < bank->num_locks; i++) {
+                hwlock = &bank->lock[i];
+
+                tmp = hwspin_lock_unregister_single(bank->base_id + i);
+                if (!tmp)
+                        return -EBUSY;
+
+                /* self-sanity check that should never fail */
+                WARN_ON(tmp != hwlock);
+        }
+
+        return 0;
+}
 EXPORT_SYMBOL_GPL(hwspin_lock_unregister);
 
 /**
@@ -348,24 +402,25 @@ EXPORT_SYMBOL_GPL(hwspin_lock_unregister);
  */
 static int __hwspin_lock_request(struct hwspinlock *hwlock)
 {
+        struct device *dev = hwlock->bank->dev;
         struct hwspinlock *tmp;
         int ret;
 
         /* prevent underlying implementation from being removed */
-        if (!try_module_get(hwlock->owner)) {
-                dev_err(hwlock->dev, "%s: can't get owner\n", __func__);
+        if (!try_module_get(dev->driver->owner)) {
+                dev_err(dev, "%s: can't get owner\n", __func__);
                 return -EINVAL;
         }
 
         /* notify PM core that power is now needed */
-        ret = pm_runtime_get_sync(hwlock->dev);
+        ret = pm_runtime_get_sync(dev);
         if (ret < 0) {
-                dev_err(hwlock->dev, "%s: can't power on device\n", __func__);
+                dev_err(dev, "%s: can't power on device\n", __func__);
                 return ret;
         }
 
         /* mark hwspinlock as used, should not fail */
-        tmp = radix_tree_tag_clear(&hwspinlock_tree, hwlock->id,
+        tmp = radix_tree_tag_clear(&hwspinlock_tree, hwlock_to_id(hwlock),
                                                         HWSPINLOCK_UNUSED);
 
         /* self-sanity check that should never fail */
@@ -387,7 +442,7 @@ int hwspin_lock_get_id(struct hwspinlock *hwlock)
                 return -EINVAL;
         }
 
-        return hwlock->id;
+        return hwlock_to_id(hwlock);
 }
 EXPORT_SYMBOL_GPL(hwspin_lock_get_id);
 
@@ -400,9 +455,7 @@ EXPORT_SYMBOL_GPL(hwspin_lock_get_id);
  * to the remote core before it can be used for synchronization (to get the
  * id of a given hwlock, use hwspin_lock_get_id()).
  *
- * Can be called from an atomic context (will not sleep) but not from
- * within interrupt context (simply because there is no use case for
- * that yet).
+ * Should be called from a process context (might sleep)
  *
  * Returns the address of the assigned hwspinlock, or NULL on error
  */
@@ -411,7 +464,7 @@ struct hwspinlock *hwspin_lock_request(void)
         struct hwspinlock *hwlock;
         int ret;
 
-        spin_lock(&hwspinlock_tree_lock);
+        mutex_lock(&hwspinlock_tree_lock);
 
         /* look for an unused lock */
         ret = radix_tree_gang_lookup_tag(&hwspinlock_tree, (void **)&hwlock,
@@ -431,7 +484,7 @@ struct hwspinlock *hwspin_lock_request(void)
                 hwlock = NULL;
 
 out:
-        spin_unlock(&hwspinlock_tree_lock);
+        mutex_unlock(&hwspinlock_tree_lock);
         return hwlock;
 }
 EXPORT_SYMBOL_GPL(hwspin_lock_request);
@@ -445,9 +498,7 @@ EXPORT_SYMBOL_GPL(hwspin_lock_request);
  * Usually early board code will be calling this function in order to
  * reserve specific hwspinlock ids for predefined purposes.
  *
- * Can be called from an atomic context (will not sleep) but not from
- * within interrupt context (simply because there is no use case for
- * that yet).
+ * Should be called from a process context (might sleep)
  *
  * Returns the address of the assigned hwspinlock, or NULL on error
  */
@@ -456,7 +507,7 @@ struct hwspinlock *hwspin_lock_request_specific(unsigned int id)
         struct hwspinlock *hwlock;
         int ret;
 
-        spin_lock(&hwspinlock_tree_lock);
+        mutex_lock(&hwspinlock_tree_lock);
 
         /* make sure this hwspinlock exists */
         hwlock = radix_tree_lookup(&hwspinlock_tree, id);
@@ -466,7 +517,7 @@ struct hwspinlock *hwspin_lock_request_specific(unsigned int id)
         }
 
         /* sanity check (this shouldn't happen) */
-        WARN_ON(hwlock->id != id);
+        WARN_ON(hwlock_to_id(hwlock) != id);
 
         /* make sure this hwspinlock is unused */
         ret = radix_tree_tag_get(&hwspinlock_tree, id, HWSPINLOCK_UNUSED);
@@ -482,7 +533,7 @@ struct hwspinlock *hwspin_lock_request_specific(unsigned int id)
                 hwlock = NULL;
 
 out:
-        spin_unlock(&hwspinlock_tree_lock);
+        mutex_unlock(&hwspinlock_tree_lock);
         return hwlock;
 }
 EXPORT_SYMBOL_GPL(hwspin_lock_request_specific);
@@ -495,14 +546,13 @@ EXPORT_SYMBOL_GPL(hwspin_lock_request_specific);
  * Should only be called with an @hwlock that was retrieved from
  * an earlier call to omap_hwspin_lock_request{_specific}.
  *
- * Can be called from an atomic context (will not sleep) but not from
- * within interrupt context (simply because there is no use case for
- * that yet).
+ * Should be called from a process context (might sleep)
  *
  * Returns 0 on success, or an appropriate error code on failure
  */
 int hwspin_lock_free(struct hwspinlock *hwlock)
 {
+        struct device *dev = hwlock->bank->dev;
         struct hwspinlock *tmp;
         int ret;
 
@@ -511,34 +561,34 @@ int hwspin_lock_free(struct hwspinlock *hwlock)
                 return -EINVAL;
         }
 
-        spin_lock(&hwspinlock_tree_lock);
+        mutex_lock(&hwspinlock_tree_lock);
 
         /* make sure the hwspinlock is used */
-        ret = radix_tree_tag_get(&hwspinlock_tree, hwlock->id,
+        ret = radix_tree_tag_get(&hwspinlock_tree, hwlock_to_id(hwlock),
                                                         HWSPINLOCK_UNUSED);
         if (ret == 1) {
-                dev_err(hwlock->dev, "%s: hwlock is already free\n", __func__);
+                dev_err(dev, "%s: hwlock is already free\n", __func__);
                 dump_stack();
                 ret = -EINVAL;
                 goto out;
         }
 
         /* notify the underlying device that power is not needed */
-        ret = pm_runtime_put(hwlock->dev);
+        ret = pm_runtime_put(dev);
         if (ret < 0)
                 goto out;
 
         /* mark this hwspinlock as available */
-        tmp = radix_tree_tag_set(&hwspinlock_tree, hwlock->id,
+        tmp = radix_tree_tag_set(&hwspinlock_tree, hwlock_to_id(hwlock),
                                                         HWSPINLOCK_UNUSED);
 
         /* sanity check (this shouldn't happen) */
         WARN_ON(tmp != hwlock);
 
-        module_put(hwlock->owner);
+        module_put(dev->driver->owner);
 
 out:
-        spin_unlock(&hwspinlock_tree_lock);
+        mutex_unlock(&hwspinlock_tree_lock);
         return ret;
 }
 EXPORT_SYMBOL_GPL(hwspin_lock_free);
diff --git a/drivers/hwspinlock/hwspinlock_internal.h b/drivers/hwspinlock/hwspinlock_internal.h
index 69935e6b93e..d26f78b8f21 100644
--- a/drivers/hwspinlock/hwspinlock_internal.h
+++ b/drivers/hwspinlock/hwspinlock_internal.h
@@ -21,6 +21,8 @@
 #include <linux/spinlock.h>
 #include <linux/device.h>
 
+struct hwspinlock_device;
+
 /**
  * struct hwspinlock_ops - platform-specific hwspinlock handlers
  *
@@ -39,23 +41,37 @@ struct hwspinlock_ops {
 
 /**
  * struct hwspinlock - this struct represents a single hwspinlock instance
- *
- * @dev: underlying device, will be used to invoke runtime PM api
- * @ops: platform-specific hwspinlock handlers
- * @id: a global, unique, system-wide, index of the lock.
+ * @bank: the hwspinlock_device structure which owns this lock
  * @lock: initialized and used by hwspinlock core
- * @owner: underlying implementation module, used to maintain module ref count
- *
- * Note: currently simplicity was opted for, but later we can squeeze some
- * memory bytes by grouping the dev, ops and owner members in a single
- * per-platform struct, and have all hwspinlocks point at it.
+ * @priv: private data, owned by the underlying platform-specific hwspinlock drv
  */
 struct hwspinlock {
+        struct hwspinlock_device *bank;
+        spinlock_t lock;
+        void *priv;
+};
+
+/**
+ * struct hwspinlock_device - a device which usually spans numerous hwspinlocks
+ * @dev: underlying device, will be used to invoke runtime PM api
+ * @ops: platform-specific hwspinlock handlers
+ * @base_id: id index of the first lock in this device
+ * @num_locks: number of locks in this device
+ * @lock: dynamically allocated array of 'struct hwspinlock'
+ */
+struct hwspinlock_device {
         struct device *dev;
         const struct hwspinlock_ops *ops;
-        int id;
-        spinlock_t lock;
-        struct module *owner;
+        int base_id;
+        int num_locks;
+        struct hwspinlock lock[0];
 };
 
+static inline int hwlock_to_id(struct hwspinlock *hwlock)
+{
+        int local_id = hwlock - &hwlock->bank->lock[0];
+
+        return hwlock->bank->base_id + local_id;
+}
+
 #endif /* __HWSPINLOCK_HWSPINLOCK_H */
diff --git a/drivers/hwspinlock/omap_hwspinlock.c b/drivers/hwspinlock/omap_hwspinlock.c
index a8f02734c02..887d34effb3 100644
--- a/drivers/hwspinlock/omap_hwspinlock.c
+++ b/drivers/hwspinlock/omap_hwspinlock.c
@@ -41,33 +41,20 @@
 #define SPINLOCK_NOTTAKEN               (0)     /* free */
 #define SPINLOCK_TAKEN                  (1)     /* locked */
 
-#define to_omap_hwspinlock(lock)        \
-        container_of(lock, struct omap_hwspinlock, lock)
-
-struct omap_hwspinlock {
-        struct hwspinlock lock;
-        void __iomem *addr;
-};
-
-struct omap_hwspinlock_state {
-        int num_locks;                  /* Total number of locks in system */
-        void __iomem *io_base;          /* Mapped base address */
-};
-
 static int omap_hwspinlock_trylock(struct hwspinlock *lock)
 {
-        struct omap_hwspinlock *omap_lock = to_omap_hwspinlock(lock);
+        void __iomem *lock_addr = lock->priv;
 
         /* attempt to acquire the lock by reading its value */
-        return (SPINLOCK_NOTTAKEN == readl(omap_lock->addr));
+        return (SPINLOCK_NOTTAKEN == readl(lock_addr));
 }
 
 static void omap_hwspinlock_unlock(struct hwspinlock *lock)
 {
-        struct omap_hwspinlock *omap_lock = to_omap_hwspinlock(lock);
+        void __iomem *lock_addr = lock->priv;
 
         /* release the lock by writing 0 to it */
-        writel(SPINLOCK_NOTTAKEN, omap_lock->addr);
+        writel(SPINLOCK_NOTTAKEN, lock_addr);
 }
 
 /*
@@ -93,26 +80,23 @@ static const struct hwspinlock_ops omap_hwspinlock_ops = {
 
 static int __devinit omap_hwspinlock_probe(struct platform_device *pdev)
 {
-        struct omap_hwspinlock *omap_lock;
-        struct omap_hwspinlock_state *state;
-        struct hwspinlock *lock;
+        struct hwspinlock_pdata *pdata = pdev->dev.platform_data;
+        struct hwspinlock_device *bank;
+        struct hwspinlock *hwlock;
         struct resource *res;
         void __iomem *io_base;
-        int i, ret;
+        int num_locks, i, ret;
+
+        if (!pdata)
+                return -ENODEV;
 
         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
         if (!res)
                 return -ENODEV;
 
-        state = kzalloc(sizeof(*state), GFP_KERNEL);
-        if (!state)
-                return -ENOMEM;
-
         io_base = ioremap(res->start, resource_size(res));
-        if (!io_base) {
-                ret = -ENOMEM;
-                goto free_state;
-        }
+        if (!io_base)
+                return -ENOMEM;
 
         /* Determine number of locks */
         i = readl(io_base + SYSSTATUS_OFFSET);
@@ -124,10 +108,18 @@ static int __devinit omap_hwspinlock_probe(struct platform_device *pdev)
                 goto iounmap_base;
         }
 
-        state->num_locks = i * 32;
-        state->io_base = io_base;
+        num_locks = i * 32; /* actual number of locks in this device */
+
+        bank = kzalloc(sizeof(*bank) + num_locks * sizeof(*hwlock), GFP_KERNEL);
+        if (!bank) {
+                ret = -ENOMEM;
+                goto iounmap_base;
+        }
+
+        platform_set_drvdata(pdev, bank);
 
-        platform_set_drvdata(pdev, state);
+        for (i = 0, hwlock = &bank->lock[0]; i < num_locks; i++, hwlock++)
+                hwlock->priv = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
 
         /*
          * runtime PM will make sure the clock of this module is
@@ -135,79 +127,46 @@ static int __devinit omap_hwspinlock_probe(struct platform_device *pdev)
          */
         pm_runtime_enable(&pdev->dev);
 
-        for (i = 0; i < state->num_locks; i++) {
-                omap_lock = kzalloc(sizeof(*omap_lock), GFP_KERNEL);
-                if (!omap_lock) {
-                        ret = -ENOMEM;
-                        goto free_locks;
-                }
-
-                omap_lock->lock.dev = &pdev->dev;
-                omap_lock->lock.owner = THIS_MODULE;
-                omap_lock->lock.id = i;
-                omap_lock->lock.ops = &omap_hwspinlock_ops;
-                omap_lock->addr = io_base + LOCK_BASE_OFFSET + sizeof(u32) * i;
-
-                ret = hwspin_lock_register(&omap_lock->lock);
-                if (ret) {
-                        kfree(omap_lock);
-                        goto free_locks;
-                }
-        }
+        ret = hwspin_lock_register(bank, &pdev->dev, &omap_hwspinlock_ops,
+                                                pdata->base_id, num_locks);
+        if (ret)
+                goto reg_fail;
 
         return 0;
 
-free_locks:
-        while (--i >= 0) {
-                lock = hwspin_lock_unregister(i);
-                /* this should't happen, but let's give our best effort */
-                if (!lock) {
-                        dev_err(&pdev->dev, "%s: cleanups failed\n", __func__);
-                        continue;
-                }
-                omap_lock = to_omap_hwspinlock(lock);
-                kfree(omap_lock);
-        }
+reg_fail:
         pm_runtime_disable(&pdev->dev);
+        kfree(bank);
 iounmap_base:
         iounmap(io_base);
-free_state:
-        kfree(state);
         return ret;
 }
 
-static int omap_hwspinlock_remove(struct platform_device *pdev)
+static int __devexit omap_hwspinlock_remove(struct platform_device *pdev)
 {
-        struct omap_hwspinlock_state *state = platform_get_drvdata(pdev);
-        struct hwspinlock *lock;
-        struct omap_hwspinlock *omap_lock;
-        int i;
-
-        for (i = 0; i < state->num_locks; i++) {
-                lock = hwspin_lock_unregister(i);
-                /* this shouldn't happen at this point. if it does, at least
-                 * don't continue with the remove */
-                if (!lock) {
-                        dev_err(&pdev->dev, "%s: failed on %d\n", __func__, i);
-                        return -EBUSY;
-                }
-
-                omap_lock = to_omap_hwspinlock(lock);
-                kfree(omap_lock);
+        struct hwspinlock_device *bank = platform_get_drvdata(pdev);
+        void __iomem *io_base = bank->lock[0].priv - LOCK_BASE_OFFSET;
+        int ret;
+
+        ret = hwspin_lock_unregister(bank);
+        if (ret) {
+                dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret);
+                return ret;
         }
 
         pm_runtime_disable(&pdev->dev);
-        iounmap(state->io_base);
-        kfree(state);
+        iounmap(io_base);
+        kfree(bank);
 
         return 0;
 }
 
 static struct platform_driver omap_hwspinlock_driver = {
         .probe          = omap_hwspinlock_probe,
-        .remove         = omap_hwspinlock_remove,
+        .remove         = __devexit_p(omap_hwspinlock_remove),
         .driver         = {
                 .name   = "omap_hwspinlock",
+                .owner  = THIS_MODULE,
         },
 };
 
diff --git a/drivers/hwspinlock/u8500_hsem.c b/drivers/hwspinlock/u8500_hsem.c
new file mode 100644
index 00000000000..143461a95ae
--- /dev/null
+++ b/drivers/hwspinlock/u8500_hsem.c
@@ -0,0 +1,198 @@
+/*
+ * u8500 HWSEM driver
+ *
+ * Copyright (C) 2010-2011 ST-Ericsson
+ *
+ * Implements u8500 semaphore handling for protocol 1, no interrupts.
+ *
+ * Author: Mathieu Poirier <mathieu.poirier@linaro.org>
+ * Heavily borrowed from the work of :
+ *   Simon Que <sque@ti.com>
+ *   Hari Kanigeri <h-kanigeri2@ti.com>
+ *   Ohad Ben-Cohen <ohad@wizery.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/pm_runtime.h>
+#include <linux/slab.h>
+#include <linux/spinlock.h>
+#include <linux/hwspinlock.h>
+#include <linux/platform_device.h>
+
+#include "hwspinlock_internal.h"
+
+/*
+ * Implementation of STE's HSem protocol 1 without interrutps.
+ * The only masterID we allow is '0x01' to force people to use
+ * HSems for synchronisation between processors rather than processes
+ * on the ARM core.
+ */
+
+#define U8500_MAX_SEMAPHORE             32      /* a total of 32 semaphore */
+#define RESET_SEMAPHORE                 (0)     /* free */
+
+/*
+ * CPU ID for master running u8500 kernel.
+ * Hswpinlocks should only be used to synchonise operations
+ * between the Cortex A9 core and the other CPUs.  Hence
+ * forcing the masterID to a preset value.
+ */
+#define HSEM_MASTER_ID                  0x01
+
+#define HSEM_REGISTER_OFFSET            0x08
+
+#define HSEM_CTRL_REG                   0x00
+#define HSEM_ICRALL                     0x90
+#define HSEM_PROTOCOL_1                 0x01
+
+static int u8500_hsem_trylock(struct hwspinlock *lock)
+{
+        void __iomem *lock_addr = lock->priv;
+
+        writel(HSEM_MASTER_ID, lock_addr);
+
+        /* get only first 4 bit and compare to masterID.
+         * if equal, we have the semaphore, otherwise
+         * someone else has it.
+         */
+        return (HSEM_MASTER_ID == (0x0F & readl(lock_addr)));
+}
+
+static void u8500_hsem_unlock(struct hwspinlock *lock)
+{
+        void __iomem *lock_addr = lock->priv;
+
+        /* release the lock by writing 0 to it */
+        writel(RESET_SEMAPHORE, lock_addr);
+}
+
+/*
+ * u8500: what value is recommended here ?
+ */
+static void u8500_hsem_relax(struct hwspinlock *lock)
+{
+        ndelay(50);
+}
+
+static const struct hwspinlock_ops u8500_hwspinlock_ops = {
+        .trylock        = u8500_hsem_trylock,
+        .unlock         = u8500_hsem_unlock,
+        .relax          = u8500_hsem_relax,
+};
+
+static int __devinit u8500_hsem_probe(struct platform_device *pdev)
+{
+        struct hwspinlock_pdata *pdata = pdev->dev.platform_data;
+        struct hwspinlock_device *bank;
+        struct hwspinlock *hwlock;
+        struct resource *res;
+        void __iomem *io_base;
+        int i, ret, num_locks = U8500_MAX_SEMAPHORE;
+        ulong val;
+
+        if (!pdata)
+                return -ENODEV;
+
+        res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+        if (!res)
+                return -ENODEV;
+
+        io_base = ioremap(res->start, resource_size(res));
+        if (!io_base) {
+                ret = -ENOMEM;
+                goto free_state;
+        }
+
+        /* make sure protocol 1 is selected */
+        val = readl(io_base + HSEM_CTRL_REG);
+        writel((val & ~HSEM_PROTOCOL_1), io_base + HSEM_CTRL_REG);
+
+        /* clear all interrupts */
+        writel(0xFFFF, io_base + HSEM_ICRALL);
+
+        bank = kzalloc(sizeof(*bank) + num_locks * sizeof(*hwlock), GFP_KERNEL);
+        if (!bank) {
+                ret = -ENOMEM;
+                goto iounmap_base;
+        }
+
+        platform_set_drvdata(pdev, bank);
+
+        for (i = 0, hwlock = &bank->lock[0]; i < num_locks; i++, hwlock++)
+                hwlock->priv = io_base + HSEM_REGISTER_OFFSET + sizeof(u32) * i;
+
+        /* no pm needed for HSem but required to comply with hwspilock core */
+        pm_runtime_enable(&pdev->dev);
+
+        ret = hwspin_lock_register(bank, &pdev->dev, &u8500_hwspinlock_ops,
+                                                pdata->base_id, num_locks);
+        if (ret)
+                goto reg_fail;
+
+        return 0;
+
+reg_fail:
+        pm_runtime_disable(&pdev->dev);
+        kfree(bank);
+iounmap_base:
+        iounmap(io_base);
+        return ret;
+}
+
+static int __devexit u8500_hsem_remove(struct platform_device *pdev)
+{
+        struct hwspinlock_device *bank = platform_get_drvdata(pdev);
+        void __iomem *io_base = bank->lock[0].priv - HSEM_REGISTER_OFFSET;
+        int ret;
+
+        /* clear all interrupts */
+        writel(0xFFFF, io_base + HSEM_ICRALL);
+
+        ret = hwspin_lock_unregister(bank);
+        if (ret) {
+                dev_err(&pdev->dev, "%s failed: %d\n", __func__, ret);
+                return ret;
+        }
+
+        pm_runtime_disable(&pdev->dev);
+        iounmap(io_base);
+        kfree(bank);
+
+        return 0;
+}
+
+static struct platform_driver u8500_hsem_driver = {
+        .probe          = u8500_hsem_probe,
+        .remove         = __devexit_p(u8500_hsem_remove),
+        .driver         = {
+                .name   = "u8500_hsem",
+                .owner  = THIS_MODULE,
+        },
+};
+
+static int __init u8500_hsem_init(void)
+{
+        return platform_driver_register(&u8500_hsem_driver);
+}
+/* board init code might need to reserve hwspinlocks for predefined purposes */
+postcore_initcall(u8500_hsem_init);
+
+static void __exit u8500_hsem_exit(void)
+{
+        platform_driver_unregister(&u8500_hsem_driver);
+}
+module_exit(u8500_hsem_exit);
+
+MODULE_LICENSE("GPL v2");
+MODULE_DESCRIPTION("Hardware Spinlock driver for u8500");
+MODULE_AUTHOR("Mathieu Poirier <mathieu.poirier@linaro.org>");
diff --git a/drivers/mmc/host/omap_hsmmc.c b/drivers/mmc/host/omap_hsmmc.c
index e8ff1239668..101cd31c822 100644
--- a/drivers/mmc/host/omap_hsmmc.c
+++ b/drivers/mmc/host/omap_hsmmc.c
@@ -1270,7 +1270,7 @@ static void omap_hsmmc_protect_card(struct omap_hsmmc_host *host)
                 }
         } else {
                 if (!host->protect_card) {
-                        pr_info"%s: cover is open, "
+                        pr_info("%s: cover is open, "
                                          "card is now inaccessible\n",
                                          mmc_hostname(host->mmc));
                         host->protect_card = 1;