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Commit aec99ac9 authored by Sudheer Papothi's avatar Sudheer Papothi
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ASoC: wsa881x: Fix equilibrium temperature calculation on wsa881x 



wsa881x has built-in temperature sensor for accurate temperature
measurement. Fix equilibrium temperature calculation on
wsa881x codec.

Change-Id: I1c6fb4ee59e2b5ce2d12d1043fd0bf4430a438e8
Signed-off-by: default avatarSudheer Papothi <spapothi@codeaurora.org>
parent 377d2dff

sound/soc/codecs/wsa881x-temp-sensor.c

+4 −2
Original line number Diff line number Diff line
@@ -53,7 +53,7 @@ static void calculate_temp(long *temp_val, int dmeas, 
		*temp_val = TEMP_INVALID;

		return;

	}

	*temp_val = t1 + ((dmeas - d1)/(d2 - d1)) * (t2 - t1);

	*temp_val = t1 + (((dmeas - d1) * (t2 - t1))/(d2 - d1));

}



static int wsa881x_get_temp(struct thermal_zone_device *thermal,
@@ -95,12 +95,14 @@ static int wsa881x_get_temp(struct thermal_zone_device *thermal, 
	dmeas = ((dmeas_cur_msb << 0x8) | dmeas_cur_lsb) >> 0x6;

	pr_debug("%s: dmeas: %d\n", __func__, dmeas);

	calculate_temp(&temp_val, dmeas, codec, pdata->dig_base);

	*temp = temp_val;

	if (temp_val <= LOW_TEMP_THRESHOLD ||

			temp_val >= HIGH_TEMP_THRESHOLD) {

		pr_err("%s: T0: %ld is out of range [%d, %d]\n", __func__,

			temp_val, LOW_TEMP_THRESHOLD, HIGH_TEMP_THRESHOLD);

		ret = -EAGAIN;

		goto rel;

	}

	*temp = temp_val;

	pr_debug("%s: t0 measured: %ld\n", __func__, temp_val);

rel:

	ret = pdata->wsa_resource_acquire(codec, false);