hid-input/battery: add quirks for battery
Some devices always report percentage, despite having 0/255 as their min/max, so add a quirk for them. Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
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ef5251993c
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bbc21cfd55
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@ -1157,7 +1157,7 @@ static bool hid_match_one_id(struct hid_device *hdev,
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(id->product == HID_ANY_ID || id->product == hdev->product);
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}
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static const struct hid_device_id *hid_match_id(struct hid_device *hdev,
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const struct hid_device_id *hid_match_id(struct hid_device *hdev,
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const struct hid_device_id *id)
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{
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for (; id->bus; id++)
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@ -32,6 +32,8 @@
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#include <linux/hid.h>
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#include <linux/hid-debug.h>
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#include "hid-ids.h"
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#define unk KEY_UNKNOWN
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static const unsigned char hid_keyboard[256] = {
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@ -280,6 +282,28 @@ static enum power_supply_property hidinput_battery_props[] = {
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POWER_SUPPLY_PROP_STATUS
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};
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#define HID_BATTERY_QUIRK_PERCENT (1 << 0) /* always reports percent */
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static const struct hid_device_id hid_battery_quirks[] = {
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICMOUSE),
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HID_BATTERY_QUIRK_PERCENT },
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{ HID_BLUETOOTH_DEVICE(USB_VENDOR_ID_APPLE, USB_DEVICE_ID_APPLE_MAGICTRACKPAD),
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HID_BATTERY_QUIRK_PERCENT },
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{}
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};
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static unsigned find_battery_quirk(struct hid_device *hdev)
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{
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unsigned quirks = 0;
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const struct hid_device_id *match;
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match = hid_match_id(hdev, hid_battery_quirks);
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if (match != NULL)
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quirks = match->driver_data;
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return quirks;
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}
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static int hidinput_get_battery_property(struct power_supply *psy,
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enum power_supply_property prop,
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union power_supply_propval *val)
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@ -304,10 +328,11 @@ static int hidinput_get_battery_property(struct power_supply *psy,
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break;
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}
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/* store the returned value */
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/* I'm not calculating this using the logical_minimum and maximum */
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/* because my device returns 0-100 even though the min and max are 0-255 */
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val->intval = buf[1];
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if (dev->battery_min < dev->battery_max &&
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buf[1] >= dev->battery_min &&
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buf[1] <= dev->battery_max)
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val->intval = (100 * (buf[1] - dev->battery_min)) /
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(dev->battery_max - dev->battery_min);
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break;
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case POWER_SUPPLY_PROP_MODEL_NAME:
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@ -330,6 +355,7 @@ static void hidinput_setup_battery(struct hid_device *dev, unsigned id, s32 min,
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{
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struct power_supply *battery = &dev->battery;
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int ret;
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unsigned quirks;
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if (battery->name != NULL)
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return; /* already initialized? */
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@ -344,6 +370,13 @@ static void hidinput_setup_battery(struct hid_device *dev, unsigned id, s32 min,
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battery->use_for_apm = 0;
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battery->get_property = hidinput_get_battery_property;
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quirks = find_battery_quirk(dev);
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if (quirks & HID_BATTERY_QUIRK_PERCENT) {
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min = 0;
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max = 100;
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}
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dev->battery_min = min;
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dev->battery_max = max;
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dev->battery_report_id = id;
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@ -735,6 +735,8 @@ int hid_parse_report(struct hid_device *hid, __u8 *start, unsigned size);
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int hid_check_keys_pressed(struct hid_device *hid);
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int hid_connect(struct hid_device *hid, unsigned int connect_mask);
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void hid_disconnect(struct hid_device *hid);
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const struct hid_device_id *hid_match_id(struct hid_device *hdev,
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const struct hid_device_id *id);
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/**
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* hid_map_usage - map usage input bits
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