hid-input/battery: make the battery setup common for INPUTs and FEATUREs

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>

diff --git a/drivers/hid/hid-input.c b/drivers/hid/hid-input.c
index f5c3efc..771ff5d 100644 (file)
--- a/drivers/hid/hid-input.c
+++ b/drivers/hid/hid-input.c
@@ -351,20 +351,22 @@ static int hidinput_get_battery_property(struct power_supply *psy,
        return ret;
 }
 
-static void hidinput_setup_battery(struct hid_device *dev,
-                                  unsigned report_type, unsigned report_id,
-                                  s32 min, s32 max)
+static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type, struct hid_field *field)
 {
        struct power_supply *battery = &dev->battery;
        int ret;
        unsigned quirks;
+       s32 min, max;
+
+       if (field->usage->hid != HID_DC_BATTERYSTRENGTH)
+               return false;   /* no match */
 
        if (battery->name != NULL)
-               return;         /* already initialized? */
+               goto out;       /* already initialized? */
 
        battery->name = kasprintf(GFP_KERNEL, "hid-%s-battery", dev->uniq);
        if (battery->name == NULL)
-               return;
+               goto out;
 
        battery->type = POWER_SUPPLY_TYPE_USB;
        battery->properties = hidinput_battery_props;
@@ -374,6 +376,9 @@ static void hidinput_setup_battery(struct hid_device *dev,
 
        quirks = find_battery_quirk(dev);
 
+       min = field->logical_minimum;
+       max = field->logical_maximum;
+
        if (quirks & HID_BATTERY_QUIRK_PERCENT) {
                min = 0;
                max = 100;
@@ -382,7 +387,7 @@ static void hidinput_setup_battery(struct hid_device *dev,
        dev->battery_min = min;
        dev->battery_max = max;
        dev->battery_report_type = report_type;
-       dev->battery_report_id = report_id;
+       dev->battery_report_id = field->report->id;
 
        ret = power_supply_register(&dev->dev, battery);
        if (ret != 0) {
@@ -390,6 +395,9 @@ static void hidinput_setup_battery(struct hid_device *dev,
                kfree(battery->name);
                battery->name = NULL;
        }
+
+out:
+       return true;
 }
 
 static void hidinput_cleanup_battery(struct hid_device *dev)
@@ -402,10 +410,10 @@ static void hidinput_cleanup_battery(struct hid_device *dev)
        dev->battery.name = NULL;
 }
 #else  /* !CONFIG_HID_BATTERY_STRENGTH */
-static void hidinput_setup_battery(struct hid_device *dev,
-                                  unsigned report_type, unsigned report_id,
-                                  s32 min, s32 max)
+static bool hidinput_setup_battery(struct hid_device *dev, unsigned report_type,
+                                  struct hid_field *field)
 {
+       return false;
 }
 
 static void hidinput_cleanup_battery(struct hid_device *dev)
@@ -772,14 +780,9 @@ static void hidinput_configure_usage(struct hid_input *hidinput, struct hid_fiel
                break;
 
        case HID_UP_GENDEVCTRLS:
-               if ((usage->hid & HID_USAGE) == 0x20) { /* Battery Strength */
-                       hidinput_setup_battery(device,
-                                              HID_INPUT_REPORT,
-                                              field->report->id,
-                                              field->logical_minimum,
-                                              field->logical_maximum);
+               if (hidinput_setup_battery(device, HID_INPUT_REPORT, field))
                        goto ignore;
-               } else
+               else
                        goto unknown;
                break;
 
@@ -1055,13 +1058,7 @@ static void report_features(struct hid_device *hid)
                for (i = 0; i < rep->maxfield; i++)
                        for (j = 0; j < rep->field[i]->maxusage; j++) {
                                /* Verify if Battery Strength feature is available */
-                               if (((rep->field[i]->usage + j)->hid & HID_USAGE_PAGE) == HID_UP_GENDEVCTRLS &&
-                                       ((rep->field[i]->usage + j)->hid & HID_USAGE) == 0x20) {
-                                       hidinput_setup_battery(hid,
-                                                              HID_FEATURE_REPORT, rep->id,
-                                                              rep->field[i]->logical_minimum,
-                                                              rep->field[i]->logical_maximum);
-                               }
+                               hidinput_setup_battery(hid, HID_FEATURE_REPORT, rep->field[i]);
 
                                if (drv->feature_mapping)
                                        drv->feature_mapping(hid, rep->field[i],