From b23cdfbddb73bad9d835baabd076ee4bfe1ab2bb Mon Sep 17 00:00:00 2001 From: Hamza Mahfooz Date: Mon, 2 Aug 2021 08:52:32 -0400 Subject: HID: logitech-hidpp: battery: provide CAPACITY property for newer devices MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit For devices that only support the BATTERY_VOLTAGE (0x1001) feature, UPower requires the additional information provided by this patch, to set them up. Signed-off-by: Hamza Mahfooz Reviewed-by: Filipe Laíns Signed-off-by: Jiri Kosina --- drivers/hid/hid-logitech-hidpp.c | 44 +++++++++++++++++++++++++++++++++++++++- 1 file changed, 43 insertions(+), 1 deletion(-) (limited to 'drivers/hid') diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c index a7fa35245c2e..81de88ab2ecc 100644 --- a/drivers/hid/hid-logitech-hidpp.c +++ b/drivers/hid/hid-logitech-hidpp.c @@ -1331,6 +1331,43 @@ static int hidpp20_battery_get_battery_voltage(struct hidpp_device *hidpp, return 0; } +static int hidpp20_map_battery_capacity(struct hid_device *hid_dev, int voltage) +{ + /* NB: This voltage curve doesn't necessarily map perfectly to all + * devices that implement the BATTERY_VOLTAGE feature. This is because + * there are a few devices that use different battery technology. + */ + + static const int voltages[] = { + 4186, 4156, 4143, 4133, 4122, 4113, 4103, 4094, 4086, 4075, + 4067, 4059, 4051, 4043, 4035, 4027, 4019, 4011, 4003, 3997, + 3989, 3983, 3976, 3969, 3961, 3955, 3949, 3942, 3935, 3929, + 3922, 3916, 3909, 3902, 3896, 3890, 3883, 3877, 3870, 3865, + 3859, 3853, 3848, 3842, 3837, 3833, 3828, 3824, 3819, 3815, + 3811, 3808, 3804, 3800, 3797, 3793, 3790, 3787, 3784, 3781, + 3778, 3775, 3772, 3770, 3767, 3764, 3762, 3759, 3757, 3754, + 3751, 3748, 3744, 3741, 3737, 3734, 3730, 3726, 3724, 3720, + 3717, 3714, 3710, 3706, 3702, 3697, 3693, 3688, 3683, 3677, + 3671, 3666, 3662, 3658, 3654, 3646, 3633, 3612, 3579, 3537 + }; + + int i; + + BUILD_BUG_ON(ARRAY_SIZE(voltages) != 100); + + if (unlikely(voltage < 3500 || voltage >= 5000)) + hid_warn_once(hid_dev, + "%s: possibly using the wrong voltage curve\n", + __func__); + + for (i = 0; i < ARRAY_SIZE(voltages); i++) { + if (voltage >= voltages[i]) + return ARRAY_SIZE(voltages) - i; + } + + return 0; +} + static int hidpp20_query_battery_voltage_info(struct hidpp_device *hidpp) { u8 feature_type; @@ -1354,6 +1391,8 @@ static int hidpp20_query_battery_voltage_info(struct hidpp_device *hidpp) hidpp->battery.status = status; hidpp->battery.voltage = voltage; + hidpp->battery.capacity = hidpp20_map_battery_capacity(hidpp->hid_dev, + voltage); hidpp->battery.level = level; hidpp->battery.charge_type = charge_type; hidpp->battery.online = status != POWER_SUPPLY_STATUS_NOT_CHARGING; @@ -1378,6 +1417,8 @@ static int hidpp20_battery_voltage_event(struct hidpp_device *hidpp, if (voltage != hidpp->battery.voltage || status != hidpp->battery.status) { hidpp->battery.voltage = voltage; + hidpp->battery.capacity = hidpp20_map_battery_capacity(hidpp->hid_dev, + voltage); hidpp->battery.status = status; hidpp->battery.level = level; hidpp->battery.charge_type = charge_type; @@ -3716,7 +3757,8 @@ static int hidpp_initialize_battery(struct hidpp_device *hidpp) num_battery_props = ARRAY_SIZE(hidpp_battery_props) - 3; if (hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_MILEAGE || - hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_PERCENTAGE) + hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_PERCENTAGE || + hidpp->capabilities & HIDPP_CAPABILITY_BATTERY_VOLTAGE) battery_props[num_battery_props++] = POWER_SUPPLY_PROP_CAPACITY; -- cgit v1.2.3