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Subject: Re: [PATCH v7 3/3] thermal: tegra: add get_trend ops
To:     Wei Ni <wni@nvidia.com>, edubezval@gmail.com
Cc:     thierry.reding@gmail.com, linux-tegra@vger.kernel.org,
        rui.zhang@intel.com, srikars@nvidia.com,
        linux-kernel@vger.kernel.org, linux-pm@vger.kernel.org
References: <1546510369-28491-1-git-send-email-wni@nvidia.com>
 <1546510369-28491-4-git-send-email-wni@nvidia.com>
 <bae5b0c3-3d7f-0b60-da96-730c7e8c4e5c@linaro.org>
 <ecabe3d8-274f-7c0e-f875-6968c65a4425@nvidia.com>
From:   Daniel Lezcano <daniel.lezcano@linaro.org>
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Message-ID: <156ef39f-4bb2-c7fb-7bf0-abc9e0067c62@linaro.org>
Date:   Mon, 30 Mar 2020 19:23:14 +0200
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In-Reply-To: <ecabe3d8-274f-7c0e-f875-6968c65a4425@nvidia.com>
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Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

Hi Wei,

On 19/02/2019 03:15, Wei Ni wrote:

>>> +static int tegra_thermctl_get_trend(void *data, int trip, +
>>> enum thermal_trend *trend)

[ ... ]

>>> +	temp = tz->temperature; +	last_temp = tz->last_temperature; +
>>> mutex_unlock(&tz->lock); + +	if (temp > trip_temp) { +		if
>>> (temp >= last_temp) +			*trend = THERMAL_TREND_RAISING; +
>>> else +			*trend = THERMAL_TREND_STABLE; +	} else if (temp <
>>> trip_temp) { +		*trend = THERMAL_TREND_DROPPING; +	} else { +
>>> *trend = THERMAL_TREND_STABLE; +	} + +	return 0; +} + static
>>> const struct thermal_zone_of_device_ops tegra_of_thermal_ops =
>>> { .get_temp = tegra_thermctl_get_temp, .set_trip_temp =
>>> tegra_thermctl_set_trip_temp, +	.get_trend =
>>> tegra_thermctl_get_trend, };

It has been awhile since this patch was submitted and merged by
Eduardo. I replace him to co-maintain the thermal framework with Rui.

While figuring out the internals for code cleanup, I ended up in this
function above.

Why do you have to use this routine instead of the generic one in
get_tz_trend()?


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