linux-kernel - Re: [PATCH 1/2] HID: logitech-hidpp: add battery support for HID++ 2.0 devices

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Date:	Fri, 08 Jul 2016 16:35:45 +0200
From:	Bastien Nocera <hadess@...ess.net>
To:	Peter Hutterer <peter.hutterer@...-t.net>,
	Jiri Kosina <jikos@...nel.org>,
	Benjamin Tissoires <benjamin.tissoires@...hat.com>,
	linux-input@...r.kernel.org, linux-kernel@...r.kernel.org,
	Nestor Lopez Casado <nlopezcasad@...itech.com>
Subject: Re: [PATCH 1/2] HID: logitech-hidpp: add battery support for HID++
 2.0 devices

On Wed, 2016-06-29 at 19:28 +1000, Peter Hutterer wrote:
> +static int hidpp_battery_get_property(struct power_supply *psy,
> +                                     enum power_supply_property psp,
> +                                     union power_supply_propval
> *val)
> +{
> +       struct hidpp_device *hidpp = power_supply_get_drvdata(psy);
> +       int ret = 0;
> +
> +       switch(psp) {
> +               case POWER_SUPPLY_PROP_STATUS:
> +                       val->intval = hidpp->battery.status;
> +                       break;
> +               case POWER_SUPPLY_PROP_CAPACITY:
> +                       val->intval = hidpp->battery.level;
> +                       break;
> +               default:

You forgot to handle POWER_SUPPLY_PROP_SCOPE. This means that UPower
thinks it's supplying power to the computer to which it is connected.

Should be set to "POWER_SUPPLY_SCOPE_DEVICE". This should fix it.

>From 8fbfcfd411a4b2c55ec24adc8b8ecc0bca2db5e3 Mon Sep 17 00:00:00 2001
From: Bastien Nocera <hadess@...ess.net>
Date: Fri, 8 Jul 2016 16:34:18 +0200
Subject: [PATCH] HID: logitech-hidpp: Add scope to battery

Without a scope defined, UPower assumes that the battery is provide
power to the computer it's connected to, like a laptop battery or a UPS.

Signed-off-by: Bastien Nocera <hadess@...ess.net>
---
 drivers/hid/hid-logitech-hidpp.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
index 4eeb550..4aaf237 100644
--- a/drivers/hid/hid-logitech-hidpp.c
+++ b/drivers/hid/hid-logitech-hidpp.c
@@ -761,6 +761,7 @@ static int hidpp20_battery_event(struct hidpp_device *hidpp,
 static enum power_supply_property hidpp_battery_props[] = {
        POWER_SUPPLY_PROP_STATUS,
        POWER_SUPPLY_PROP_CAPACITY,
+       POWER_SUPPLY_PROP_SCOPE,
 };
 
 static int hidpp_battery_get_property(struct power_supply *psy,
@@ -777,6 +778,9 @@ static int hidpp_battery_get_property(struct power_supply *psy,
                case POWER_SUPPLY_PROP_CAPACITY:
                        val->intval = hidpp->battery.level;
                        break;
+               case POWER_SUPPLY_PROP_SCOPE:
+                       val->intval = POWER_SUPPLY_SCOPE_DEVICE;
+                       break;
                default:
                        ret = -EINVAL;
                        break;
-- 
2.7.4