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OMAP2+: powerdomain: add voltage domain lookup during register 

When a powerdomain is registered, lookup the voltage domain by name
and keep a pointer to the containing voltagedomain in the powerdomain
structure.

Modeled after similar method between powerdomain and clockdomain layers.

Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Kevin Hilman 2011-03-16 15:52:47 -07:00
parent 7e1b94059c
commit 048a7034f1
3 changed files with 23 additions and 0 deletions
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21
arch/arm/mach-omap2/powerdomain.c
View File

@ -77,6 +77,7 @@ static struct powerdomain *_pwrdm_lookup(const char *name)
static int _pwrdm_register(struct powerdomain *pwrdm)
{
int i;
struct voltagedomain *voltdm;
if (!pwrdm || !pwrdm->name)
return -EINVAL;
@ -91,6 +92,14 @@ static int _pwrdm_register(struct powerdomain *pwrdm)
if (_pwrdm_lookup(pwrdm->name))
return -EEXIST;
voltdm = voltdm_lookup(pwrdm->voltdm.name);
if (!voltdm) {
pr_err("powerdomain: %s: voltagedomain %s does not exist\n",
pwrdm->name, pwrdm->voltdm.name);
return -EINVAL;
}
pwrdm->voltdm.ptr = voltdm;
list_add(&pwrdm->node, &pwrdm_list);
/* Initialize the powerdomain's state counter */
@ -426,6 +435,18 @@ int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
return ret;
}
/**
* pwrdm_get_voltdm - return a ptr to the voltdm that this pwrdm resides in
* @pwrdm: struct powerdomain *
*
* Return a pointer to the struct voltageomain that the specified powerdomain
* @pwrdm exists in.
*/
struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm)
{
return pwrdm->voltdm.ptr;
}
/**
* pwrdm_get_mem_bank_count - get number of memory banks in this powerdomain
* @pwrdm: struct powerdomain *

1
arch/arm/mach-omap2/powerdomain.h
View File

@ -183,6 +183,7 @@ int pwrdm_del_clkdm(struct powerdomain *pwrdm, struct clockdomain *clkdm);
int pwrdm_for_each_clkdm(struct powerdomain *pwrdm,
int (*fn)(struct powerdomain *pwrdm,
struct clockdomain *clkdm));
struct voltagedomain *pwrdm_get_voltdm(struct powerdomain *pwrdm);
int pwrdm_get_mem_bank_count(struct powerdomain *pwrdm);

1
arch/arm/mach-omap2/voltage.h
View File

@ -186,4 +186,5 @@ extern void omap44xx_voltagedomains_init(void);
struct voltagedomain *voltdm_lookup(const char *name);
void voltdm_init(struct voltagedomain **voltdm_list);
int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm);
#endif