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greybus: power_supply: add callback to handle power supply changes

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When checking for property changes we may need to act upon that change
besides reporting it using power_supply_changed. So, add a function that
will be call if the specific property changed.

As at it, adjust some indentation of the psy_props_changes array.

Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
This commit is contained in:
Rui Miguel Silva 2016-08-16 22:31:55 +01:00 committed by Greg Kroah-Hartman
parent 6198f892fa
commit c4582f9d79
1 changed files with 20 additions and 8 deletions
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28
drivers/staging/greybus/power_supply.c
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@ -70,17 +70,22 @@ static unsigned int update_interval_max = 30 * HZ;
struct gb_power_supply_changes {
enum power_supply_property prop;
u32 tolerance_change;
void (*prop_changed)(struct gb_power_supply *gbpsy,
struct gb_power_supply_prop *prop);
};
static const struct gb_power_supply_changes psy_props_changes[] = {
{ .prop = GB_POWER_SUPPLY_PROP_STATUS,
.tolerance_change = 0,
{ .prop = GB_POWER_SUPPLY_PROP_STATUS,
.tolerance_change = 0,
.prop_changed = NULL,
},
{ .prop = GB_POWER_SUPPLY_PROP_TEMP,
.tolerance_change = 500,
{ .prop = GB_POWER_SUPPLY_PROP_TEMP,
.tolerance_change = 500,
.prop_changed = NULL,
},
{ .prop = GB_POWER_SUPPLY_PROP_ONLINE,
.tolerance_change = 0,
{ .prop = GB_POWER_SUPPLY_PROP_ONLINE,
.tolerance_change = 0,
.prop_changed = NULL,
},
};
@ -349,18 +354,25 @@ static void check_changed(struct gb_power_supply *gbpsy,
const struct gb_power_supply_changes *psyc;
int val = prop->val;
int prev_val = prop->previous_val;
bool changed = false;
int i;
for (i = 0; i < ARRAY_SIZE(psy_props_changes); i++) {
psyc = &psy_props_changes[i];
if (prop->prop == psyc->prop) {
if (!psyc->tolerance_change)
gbpsy->changed = true;
changed = true;
else if (val < prev_val &&
prev_val - val > psyc->tolerance_change)
gbpsy->changed = true;
changed = true;
else if (val > prev_val &&
val - prev_val > psyc->tolerance_change)
changed = true;
if (changed && psyc->prop_changed)
psyc->prop_changed(gbpsy, prop);
if (changed)
gbpsy->changed = true;
break;
}