linux-kernel - Re: [RFC PATCH 1/4] tools/lib/thermal: Add a thermal library

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Date:   Wed, 16 Feb 2022 08:40:52 -0800
From:   srinivas pandruvada <srinivas.pandruvada@...ux.intel.com>
To:     Daniel Lezcano <daniel.lezcano@...aro.org>, rafael@...nel.org
Cc:     linux-kernel@...r.kernel.org, linux-pm@...r.kernel.org,
        Sasha Levin <sashal@...nel.org>,
        William Breathitt Gray <vilhelm.gray@...il.com>,
        Jonathan Cameron <Jonathan.Cameron@...wei.com>
Subject: Re: [RFC PATCH 1/4] tools/lib/thermal: Add a thermal library

On Mon, 2022-02-14 at 22:04 +0100, Daniel Lezcano wrote:
> The thermal framework implements a netlink notification mechanism to
> be used by the userspace to have a thermal configuration discovery,
> trip point changes or violation, cooling device changes
> notifications,
> etc...
> 
> This library provides a level of abstraction for the thermal netlink
> notification allowing the userspace to connect to the notification
> mechanism more easily. The library is callback oriented.
> 
Some minor comments.
May be better use some defines instead of returning "-1" for error
conditions.
> 

[...]

> +struct thermal_zone *thermal_zone_find_by_name(struct thermal_zone
> *tz,
> +                                              const char *name)
> +{
> +       int i;
> +
> +       if (!name)
> +               return NULL;
> +       
> +       for (i = 0; tz[i].id != -1; i++) {
> +               if (!strcmp(tz[i].name, name))
strncmp

> +                       return &tz[i];
> +       }
> +
> +       return NULL;
> +}
> +
> 

[...]

> diff --git a/tools/lib/thermal/thermal_nl.h
> b/tools/lib/thermal/thermal_nl.h
> new file mode 100644
> index 000000000000..54dbbad58349
> --- /dev/null
> +++ b/tools/lib/thermal/thermal_nl.h
> @@ -0,0 +1,43 @@
> +/* SPDX-License-Identifier: LGPL-2.1+ */
> +/* Copyright (C) 2022, Linaro Ltd - Daniel Lezcano
> <daniel.lezcano@...aro.org> */
> +#ifndef __THERMAL_H
> +#define __THERMAL_H
__THERMAL_NL_H


> 
[...]

> +/*
> + * Low level netlink
> + */
> +extern int nl_subscribe_thermal(struct nl_sock *nl_sock, struct
> nl_cb *nl_cb,
> +                               const char *group);
> +
To complete API, don't we need nl_unsubscribe which calls
nl_socket_drop_memberships()?


Thanks,
Srinivas