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Wysocki , Daniel Lezcano , Zhang Rui , Lukasz Luba , Christian Marangi , Lorenzo Bianconi , linux-kernel@vger.kernel.org, linux-mediatek@lists.infradead.org Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: In airoha_thermal_setup_monitor(), the TEMPMONCTL2 register is programmed with: writel(FIELD_PREP(EN7581_FILT_INTERVAL, 1) | FIELD_PREP(EN7581_FILT_INTERVAL, 379), ...) Both FIELD_PREP calls target FILT_INTERVAL (GENMASK(25,16)), so the second one overwrites the first. The sensor interval field SEN_INTERVAL (GENMASK(9,0)) is never written and remains zero. The comment above states: "filt interval is 1 * 52.715us, sen interval is 379 * 52.715us", confirming the second value should go into SEN_INTERVAL. This matches the Mediatek auxadc_thermal.c reference implementation which correctly writes FILTER_INTERVAL and SENSOR_INTERVAL to their respective non-overlapping bit fields. Actual effect: FILT=379 (should be 1), SEN=0 (should be 379). The filter interval runs 379x too long and the sensor sampling interval is uninitialized, causing incorrect thermal monitoring timing. Fix by replacing the second FIELD_PREP's mask from FILT_INTERVAL to SEN_INTERVAL. Fixes: 42de37f40e1b ("thermal/drivers: Add support for Airoha EN7581 thermal sensor") Signed-off-by: Wayen --- drivers/thermal/airoha_thermal.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/thermal/airoha_thermal.c b/drivers/thermal/airoha_thermal.c index b9fd6bfc88..e8a33234e0 100644 --- a/drivers/thermal/airoha_thermal.c +++ b/drivers/thermal/airoha_thermal.c @@ -403,7 +403,7 @@ static void airoha_thermal_setup_monitor(struct airoha_thermal_priv *priv) * sen interval is 379 * 52.715us = 19.97ms */ writel(FIELD_PREP(EN7581_FILT_INTERVAL, 1) | - FIELD_PREP(EN7581_FILT_INTERVAL, 379), + FIELD_PREP(EN7581_SEN_INTERVAL, 379), priv->base + EN7581_TEMPMONCTL2); /* AHB poll is set to 146 * 68.64 = 10.02us */ -- 2.51.0