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ARM: OMAP2+: hwmod: provide a function to return the address space of the MPU RT

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A subsequent patch will need to know the struct omap_hwmod_addr_space
record corresponding to the module's register target, used by the MPU.
So, convert _find_mpu_rt_base() into _find_mpu_rt_addr_space().  Then
modify its sole current user, _populate_mpu_rt_base(), to extract the
MPU RT base address itself from the struct omap_hwmod_addr_space record.

Signed-off-by: Paul Walmsley <paul@pwsan.com>
Cc: Benoît Cousson <b-cousson@ti.com>
This commit is contained in:
Paul Walmsley 2012-04-18 19:10:05 -06:00
parent 747834ab83
commit c9aafd23d6
1 changed files with 31 additions and 24 deletions
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55
arch/arm/mach-omap2/omap_hwmod.c
View file

@ -884,24 +884,22 @@ static int __init _find_mpu_port_index(struct omap_hwmod *oh)
}
/**
* _find_mpu_rt_base - find hwmod register target base addr accessible by MPU
* _find_mpu_rt_addr_space - return MPU register target address space for @oh
* @oh: struct omap_hwmod *
*
* Return the virtual address of the base of the register target of
* device @oh, or NULL on error.
* Returns a pointer to the struct omap_hwmod_addr_space record representing
* the register target MPU address space; or returns NULL upon error.
*/
static void __iomem * __init _find_mpu_rt_base(struct omap_hwmod *oh, u8 index)
static struct omap_hwmod_addr_space * __init _find_mpu_rt_addr_space(struct omap_hwmod *oh)
{
struct omap_hwmod_ocp_if *os;
struct omap_hwmod_addr_space *mem;
int i = 0, found = 0;
void __iomem *va_start;
int found = 0, i = 0;
if (!oh || oh->slaves_cnt == 0)
if (!oh || oh->_int_flags & _HWMOD_NO_MPU_PORT || oh->slaves_cnt == 0)
return NULL;
os = oh->slaves[index];
os = oh->slaves[oh->_mpu_port_index];
if (!os->addr)
return NULL;
@ -911,20 +909,7 @@ static void __iomem * __init _find_mpu_rt_base(struct omap_hwmod *oh, u8 index)
found = 1;
} while (!found && mem->pa_start != mem->pa_end);
if (found) {
va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
if (!va_start) {
pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name);
return NULL;
}
pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
oh->name, va_start);
} else {
pr_debug("omap_hwmod: %s: no MPU register target found\n",
oh->name);
}
return (found) ? va_start : NULL;
return (found) ? mem : NULL;
}
/**
@ -1813,10 +1798,32 @@ static int _shutdown(struct omap_hwmod *oh)
*/
static void __init _init_mpu_rt_base(struct omap_hwmod *oh, void *data)
{
struct omap_hwmod_addr_space *mem;
void __iomem *va_start;
if (!oh)
return;
if (oh->_int_flags & _HWMOD_NO_MPU_PORT)
return;
oh->_mpu_rt_va = _find_mpu_rt_base(oh, oh->_mpu_port_index);
mem = _find_mpu_rt_addr_space(oh);
if (!mem) {
pr_debug("omap_hwmod: %s: no MPU register target found\n",
oh->name);
return;
}
va_start = ioremap(mem->pa_start, mem->pa_end - mem->pa_start);
if (!va_start) {
pr_err("omap_hwmod: %s: Could not ioremap\n", oh->name);
return;
}
pr_debug("omap_hwmod: %s: MPU register target at va %p\n",
oh->name, va_start);
oh->_mpu_rt_va = va_start;
}
/**