OMAP2+: voltage: keep track of powerdomains in each voltagedomain

When a powerdomain is registered and it has an associated voltage domain,
add the powerdomain to the voltagedomain using voltdm_add_pwrdm().

Also add voltagedomain iterator helper functions to iterate over all
registered voltagedomains and all powerdomains associated with a
voltagedomain.

Modeled after a similar relationship between clockdomains and powerdomains.

Signed-off-by: Kevin Hilman <khilman@ti.com>
This commit is contained in:
Kevin Hilman 2011-03-16 16:13:15 -07:00
parent 048a7034f1
commit e69c22b145
4 changed files with 93 additions and 0 deletions

View File

@ -99,6 +99,8 @@ static int _pwrdm_register(struct powerdomain *pwrdm)
return -EINVAL;
}
pwrdm->voltdm.ptr = voltdm;
INIT_LIST_HEAD(&pwrdm->voltdm_node);
voltdm_add_pwrdm(voltdm, pwrdm);
list_add(&pwrdm->node, &pwrdm_list);

View File

@ -91,6 +91,7 @@ struct powerdomain;
* @pwrsts_mem_on: Possible memory bank pwrstates when pwrdm in ON
* @pwrdm_clkdms: Clockdomains in this powerdomain
* @node: list_head linking all powerdomains
* @voltdm_node: list_head linking all powerdomains in a voltagedomain
* @state:
* @state_counter:
* @timer:
@ -114,6 +115,7 @@ struct powerdomain {
const u8 prcm_partition;
struct clockdomain *pwrdm_clkdms[PWRDM_MAX_CLKDMS];
struct list_head node;
struct list_head voltdm_node;
int state;
unsigned state_counter[PWRDM_MAX_PWRSTS];
unsigned ret_logic_off_counter;

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@ -36,6 +36,7 @@
#include "control.h"
#include "voltage.h"
#include "powerdomain.h"
#include "vc.h"
#include "vp.h"
@ -1085,11 +1086,90 @@ static struct voltagedomain *_voltdm_lookup(const char *name)
return voltdm;
}
/**
* voltdm_add_pwrdm - add a powerdomain to a voltagedomain
* @voltdm: struct voltagedomain * to add the powerdomain to
* @pwrdm: struct powerdomain * to associate with a voltagedomain
*
* Associate the powerdomain @pwrdm with a voltagedomain @voltdm. This
* enables the use of voltdm_for_each_pwrdm(). Returns -EINVAL if
* presented with invalid pointers; -ENOMEM if memory could not be allocated;
* or 0 upon success.
*/
int voltdm_add_pwrdm(struct voltagedomain *voltdm, struct powerdomain *pwrdm)
{
if (!voltdm || !pwrdm)
return -EINVAL;
pr_debug("voltagedomain: associating powerdomain %s with voltagedomain "
"%s\n", pwrdm->name, voltdm->name);
list_add(&pwrdm->voltdm_node, &voltdm->pwrdm_list);
return 0;
}
/**
* voltdm_for_each_pwrdm - call function for each pwrdm in a voltdm
* @voltdm: struct voltagedomain * to iterate over
* @fn: callback function *
*
* Call the supplied function @fn for each powerdomain in the
* voltagedomain @voltdm. Returns -EINVAL if presented with invalid
* pointers; or passes along the last return value of the callback
* function, which should be 0 for success or anything else to
* indicate failure.
*/
int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
int (*fn)(struct voltagedomain *voltdm,
struct powerdomain *pwrdm))
{
struct powerdomain *pwrdm;
int ret = 0;
if (!fn)
return -EINVAL;
list_for_each_entry(pwrdm, &voltdm->pwrdm_list, voltdm_node)
ret = (*fn)(voltdm, pwrdm);
return ret;
}
/**
* voltdm_for_each - call function on each registered voltagedomain
* @fn: callback function *
*
* Call the supplied function @fn for each registered voltagedomain.
* The callback function @fn can return anything but 0 to bail out
* early from the iterator. Returns the last return value of the
* callback function, which should be 0 for success or anything else
* to indicate failure; or -EINVAL if the function pointer is null.
*/
int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
void *user)
{
struct voltagedomain *temp_voltdm;
int ret = 0;
if (!fn)
return -EINVAL;
list_for_each_entry(temp_voltdm, &voltdm_list, node) {
ret = (*fn)(temp_voltdm, user);
if (ret)
break;
}
return ret;
}
static int _voltdm_register(struct voltagedomain *voltdm)
{
if (!voltdm || !voltdm->name)
return -EINVAL;
INIT_LIST_HEAD(&voltdm->pwrdm_list);
list_add(&voltdm->node, &voltdm_list);
pr_debug("voltagedomain: registered %s\n", voltdm->name);

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@ -19,6 +19,8 @@
#include "vc.h"
#include "vp.h"
struct powerdomain;
/* XXX document */
#define VOLTSCALE_VPFORCEUPDATE 1
#define VOLTSCALE_VCBYPASS 2
@ -55,12 +57,14 @@ struct omap_vfsm_instance_data {
* @name: Name of the voltage domain which can be used as a unique identifier.
* @scalable: Whether or not this voltage domain is scalable
* @node: list_head linking all voltage domains
* @pwrdm_list: list_head linking all powerdomains in this voltagedomain
* @vdd: to be removed
*/
struct voltagedomain {
char *name;
bool scalable;
struct list_head node;
struct list_head pwrdm_list;
struct omap_vdd_info *vdd;
};
@ -187,4 +191,9 @@ 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);
int voltdm_for_each(int (*fn)(struct voltagedomain *voltdm, void *user),
void *user);
int voltdm_for_each_pwrdm(struct voltagedomain *voltdm,
int (*fn)(struct voltagedomain *voltdm,
struct powerdomain *pwrdm));
#endif