linux-kernel - Re: [PATCH 2/2] HID: hid-logitech-hidpp: subscribe to battery voltage change events

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Date:   Wed, 5 Jun 2019 12:40:56 -0400
From:   Pedro Vanzella <pedro@...rovanzella.com>
To:     linux-input@...r.kernel.org
Cc:     Jiri Kosina <jikos@...nel.org>,
        Benjamin Tissoires <benjamin.tissoires@...hat.com>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH 2/2] HID: hid-logitech-hidpp: subscribe to battery
 voltage change events

Sorry for littering the list, but please ignore this patch set. I'll
have one that uses a quirk to detect the right devices in a little
while.

On 06/04, Pedro Vanzella wrote:
> Same as with the other ways of reporting battery status,
> fetch the battery voltage on raw hidpp events.
> 
> Signed-off-by: Pedro Vanzella <pedro@...rovanzella.com>
> ---
>  drivers/hid/hid-logitech-hidpp.c | 32 ++++++++++++++++++++++++++++++++
>  1 file changed, 32 insertions(+)
> 
> diff --git a/drivers/hid/hid-logitech-hidpp.c b/drivers/hid/hid-logitech-hidpp.c
> index e68ea44b0d24..1eee206a0aed 100644
> --- a/drivers/hid/hid-logitech-hidpp.c
> +++ b/drivers/hid/hid-logitech-hidpp.c
> @@ -1313,6 +1313,35 @@ static int hidpp20_query_battery_voltage_info(struct hidpp_device *hidpp)
>  	return 0;
>  }
>  
> +static int hidpp20_battery_voltage_event(struct hidpp_device *hidpp,
> +					 u8 *data, int size)
> +{
> +	struct hidpp_report *report = (struct hidpp_report *)data;
> +	int status, voltage;
> +	bool changed;
> +
> +	if (report->fap.feature_index != hidpp->battery.voltage_feature_index ||
> +	    report->fap.funcindex_clientid !=
> +		    EVENT_BATTERY_LEVEL_STATUS_BROADCAST)
> +		return 0;
> +
> +	status = hidpp20_battery_map_status_voltage(report->fap.params,
> +						    &voltage);
> +
> +	hidpp->battery.online = status != POWER_SUPPLY_STATUS_NOT_CHARGING;
> +
> +	changed = voltage != hidpp->battery.voltage ||
> +		  status != hidpp->battery.status;
> +
> +	if (changed) {
> +		hidpp->battery.voltage = voltage;
> +		hidpp->battery.status = status;
> +		if (hidpp->battery.ps)
> +			power_supply_changed(hidpp->battery.ps);
> +	}
> +	return 0;
> +}
> +
>  static enum power_supply_property hidpp_battery_props[] = {
>  	POWER_SUPPLY_PROP_ONLINE,
>  	POWER_SUPPLY_PROP_STATUS,
> @@ -3181,6 +3210,9 @@ static int hidpp_raw_hidpp_event(struct hidpp_device *hidpp, u8 *data,
>  		ret = hidpp_solar_battery_event(hidpp, data, size);
>  		if (ret != 0)
>  			return ret;
> +		ret = hidpp20_battery_voltage_event(hidpp, data, size);
> +		if (ret != 0)
> +			return ret;
>  	}
>  
>  	if (hidpp->capabilities & HIDPP_CAPABILITY_HIDPP10_BATTERY) {
> -- 
> 2.21.0
> 

-- 
Pedro Vanzella
pedrovanzella.com
#include <paranoia.h>
Don't Panic

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