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OMAP2+: hwmod: Make omap_hwmod_register private and remove omap_hwmod_unregister 

Do not allow omap_hwmod_register to be used outside the core
hwmod code. An omap_hwmod should be registered only at init time.
Remove the omap_hwmod_unregister that is not used today since the
hwmod list will be built once at init time and never be modified
at runtime.

Signed-off-by: Benoit Cousson <b-cousson@ti.com>
Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Kevin Hilman <khilman@deeprootsystems.com>
This commit is contained in:
Benoit Cousson 2010-12-21 21:31:27 -07:00 committed by Paul Walmsley
parent 50ebb7772c
commit 0102b62789
2 changed files with 56 additions and 85 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

139
arch/arm/mach-omap2/omap_hwmod.c
View File

@ -1418,6 +1418,60 @@ static int _setup(struct omap_hwmod *oh, void *data)
return 0;
}
/**
* _register - register a struct omap_hwmod
* @oh: struct omap_hwmod *
*
* Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod
* already has been registered by the same name; -EINVAL if the
* omap_hwmod is in the wrong state, if @oh is NULL, if the
* omap_hwmod's class field is NULL; if the omap_hwmod is missing a
* name, or if the omap_hwmod's class is missing a name; or 0 upon
* success.
*
* XXX The data should be copied into bootmem, so the original data
* should be marked __initdata and freed after init. This would allow
* unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
* that the copy process would be relatively complex due to the large number
* of substructures.
*/
static int _register(struct omap_hwmod *oh)
{
int ret, ms_id;
if (!oh || !oh->name || !oh->class || !oh->class->name ||
(oh->_state != _HWMOD_STATE_UNKNOWN))
return -EINVAL;
mutex_lock(&omap_hwmod_mutex);
pr_debug("omap_hwmod: %s: registering\n", oh->name);
if (_lookup(oh->name)) {
ret = -EEXIST;
goto ohr_unlock;
}
ms_id = _find_mpu_port_index(oh);
if (!IS_ERR_VALUE(ms_id)) {
oh->_mpu_port_index = ms_id;
oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index);
} else {
oh->_int_flags |= _HWMOD_NO_MPU_PORT;
}
list_add_tail(&oh->node, &omap_hwmod_list);
spin_lock_init(&oh->_lock);
oh->_state = _HWMOD_STATE_REGISTERED;
ret = 0;
ohr_unlock:
mutex_unlock(&omap_hwmod_mutex);
return ret;
}
/* Public functions */
@ -1470,61 +1524,6 @@ int omap_hwmod_set_slave_idlemode(struct omap_hwmod *oh, u8 idlemode)
return retval;
}
/**
* omap_hwmod_register - register a struct omap_hwmod
* @oh: struct omap_hwmod *
*
* Registers the omap_hwmod @oh. Returns -EEXIST if an omap_hwmod
* already has been registered by the same name; -EINVAL if the
* omap_hwmod is in the wrong state, if @oh is NULL, if the
* omap_hwmod's class field is NULL; if the omap_hwmod is missing a
* name, or if the omap_hwmod's class is missing a name; or 0 upon
* success.
*
* XXX The data should be copied into bootmem, so the original data
* should be marked __initdata and freed after init. This would allow
* unneeded omap_hwmods to be freed on multi-OMAP configurations. Note
* that the copy process would be relatively complex due to the large number
* of substructures.
*/
int omap_hwmod_register(struct omap_hwmod *oh)
{
int ret, ms_id;
if (!oh || !oh->name || !oh->class || !oh->class->name ||
(oh->_state != _HWMOD_STATE_UNKNOWN))
return -EINVAL;
mutex_lock(&omap_hwmod_mutex);
pr_debug("omap_hwmod: %s: registering\n", oh->name);
if (_lookup(oh->name)) {
ret = -EEXIST;
goto ohr_unlock;
}
ms_id = _find_mpu_port_index(oh);
if (!IS_ERR_VALUE(ms_id)) {
oh->_mpu_port_index = ms_id;
oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index);
} else {
oh->_int_flags |= _HWMOD_NO_MPU_PORT;
}
list_add_tail(&oh->node, &omap_hwmod_list);
spin_lock_init(&oh->_lock);
oh->_state = _HWMOD_STATE_REGISTERED;
ret = 0;
ohr_unlock:
mutex_unlock(&omap_hwmod_mutex);
return ret;
}
/**
* omap_hwmod_lookup - look up a registered omap_hwmod by name
* @name: name of the omap_hwmod to look up
@ -1604,8 +1603,8 @@ int omap_hwmod_init(struct omap_hwmod **ohs)
oh = *ohs;
while (oh) {
if (omap_chip_is(oh->omap_chip)) {
r = omap_hwmod_register(oh);
WARN(r, "omap_hwmod: %s: omap_hwmod_register returned "
r = _register(oh);
WARN(r, "omap_hwmod: %s: _register returned "
"%d\n", oh->name, r);
}
oh = *++ohs;
@ -1638,32 +1637,6 @@ int omap_hwmod_late_init(void)
return 0;
}
/**
* omap_hwmod_unregister - unregister an omap_hwmod
* @oh: struct omap_hwmod *
*
* Unregisters a previously-registered omap_hwmod @oh. There's probably
* no use case for this, so it is likely to be removed in a later version.
*
* XXX Free all of the bootmem-allocated structures here when that is
* implemented. Make it clear that core code is the only code that is
* expected to unregister modules.
*/
int omap_hwmod_unregister(struct omap_hwmod *oh)
{
if (!oh)
return -EINVAL;
pr_debug("omap_hwmod: %s: unregistering\n", oh->name);
mutex_lock(&omap_hwmod_mutex);
iounmap(oh->_mpu_rt_va);
list_del(&oh->node);
mutex_unlock(&omap_hwmod_mutex);
return 0;
}
/**
* omap_hwmod_enable - enable an omap_hwmod
* @oh: struct omap_hwmod *

2
arch/arm/plat-omap/include/plat/omap_hwmod.h
View File

@ -515,8 +515,6 @@ struct omap_hwmod {
};
int omap_hwmod_init(struct omap_hwmod **ohs);
int omap_hwmod_register(struct omap_hwmod *oh);
int omap_hwmod_unregister(struct omap_hwmod *oh);
struct omap_hwmod *omap_hwmod_lookup(const char *name);
int omap_hwmod_for_each(int (*fn)(struct omap_hwmod *oh, void *data),
void *data);