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Tue, 29 Oct 2019 17:45:45 +0100 Received: from euls16034.sgp.st.com (euls16034.sgp.st.com [10.75.44.20]) by beta.dmz-eu.st.com (STMicroelectronics) with ESMTP id 761D510002A; Tue, 29 Oct 2019 17:45:45 +0100 (CET) Received: from Webmail-eu.st.com (sfhdag6node2.st.com [10.75.127.17]) by euls16034.sgp.st.com (STMicroelectronics) with ESMTP id 654DF2A748A; Tue, 29 Oct 2019 17:45:45 +0100 (CET) Received: from localhost (10.75.127.51) by SFHDAG6NODE2.st.com (10.75.127.17) with Microsoft SMTP Server (TLS) id 15.0.1347.2; Tue, 29 Oct 2019 17:45:45 +0100 From: Pascal Paillet To: , , , , , , , , , , , , , , Subject: [PATCH 3/4] thermal: stm32: fix engineering calibration value Date: Tue, 29 Oct 2019 17:45:36 +0100 Message-ID: <20191029164537.1561-4-p.paillet@st.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20191029164537.1561-1-p.paillet@st.com> References: <20191029164537.1561-1-p.paillet@st.com> MIME-Version: 1.0 X-Originating-IP: [10.75.127.51] X-ClientProxiedBy: SFHDAG6NODE3.st.com (10.75.127.18) To SFHDAG6NODE2.st.com (10.75.127.17) X-Proofpoint-Virus-Version: vendor=fsecure engine=2.50.10434:6.0.95,1.0.8 definitions=2019-10-29_05:2019-10-28,2019-10-29 signatures=0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191029_094558_263816_46E5C5CB X-CRM114-Status: GOOD ( 15.76 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: p.paillet@st.com Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org TS1_T0 is only used by engineering during calibration. The temperature offset is actually fixed to 30 Celsius. Signed-off-by: Pascal Paillet Change-Id: I83abea65ff3f58f8954256495f2d5d38f0d868d9 --- drivers/thermal/st/stm_thermal.c | 22 ++++++---------------- 1 file changed, 6 insertions(+), 16 deletions(-) diff --git a/drivers/thermal/st/stm_thermal.c b/drivers/thermal/st/stm_thermal.c index 4bc1bbece0de..37abbdffe573 100644 --- a/drivers/thermal/st/stm_thermal.c +++ b/drivers/thermal/st/stm_thermal.c @@ -82,8 +82,7 @@ #define ONE_MHZ 1000000 #define POLL_TIMEOUT 5000 #define STARTUP_TIME 40 -#define TS1_T0_VAL0 30000 /* 30 celsius */ -#define TS1_T0_VAL1 130000 /* 130 celsius */ +#define T0 30000 /* 30 celsius */ #define NO_HW_TRIG 0 #define SAMPLING_TIME 15 @@ -94,7 +93,7 @@ struct stm_thermal_sensor { struct clk *clk; int irq; void __iomem *base; - int t0, fmt0, ramp_coeff; + int fmt0, ramp_coeff; int low_en, high_en; }; @@ -248,14 +247,6 @@ static int stm_thermal_calibration(struct stm_thermal_sensor *sensor) /* Fill in DTS structure with factory sensor values */ static int stm_thermal_read_factory_settings(struct stm_thermal_sensor *sensor) { - /* Retrieve engineering calibration temperature */ - sensor->t0 = readl_relaxed(sensor->base + DTS_T0VALR1_OFFSET) & - TS1_T0_MASK; - if (!sensor->t0) - sensor->t0 = TS1_T0_VAL0; - else - sensor->t0 = TS1_T0_VAL1; - /* Retrieve fmt0 and put it on Hz */ sensor->fmt0 = ADJUST * (readl_relaxed(sensor->base + DTS_T0VALR1_OFFSET) & TS1_FMT0_MASK); @@ -269,8 +260,8 @@ static int stm_thermal_read_factory_settings(struct stm_thermal_sensor *sensor) return -EINVAL; } - dev_dbg(sensor->dev, "%s: T0 = %doC, FMT0 = %dHz, RAMP_COEFF = %dHz/oC", - __func__, sensor->t0, sensor->fmt0, sensor->ramp_coeff); + dev_dbg(sensor->dev, "%s: FMT0 = %dHz, RAMP_COEFF = %dHz/oC", + __func__, sensor->fmt0, sensor->ramp_coeff); return 0; } @@ -281,8 +272,7 @@ static int stm_thermal_calculate_threshold(struct stm_thermal_sensor *sensor, int freqM; /* Figure out the CLK_PTAT frequency for a given temperature */ - freqM = ((temp - sensor->t0) * sensor->ramp_coeff) / 1000 + - sensor->fmt0; + freqM = ((temp - T0) * sensor->ramp_coeff) / 1000 + sensor->fmt0; /* Figure out the threshold sample number */ *th = clk_get_rate(sensor->clk) * SAMPLING_TIME / freqM; @@ -317,7 +307,7 @@ static int stm_thermal_get_temp(void *data, int *temp) return -EINVAL; /* Figure out the temperature in mili celsius */ - *temp = (freqM - sensor->fmt0) * 1000 / sensor->ramp_coeff + sensor->t0; + *temp = (freqM - sensor->fmt0) * 1000 / sensor->ramp_coeff + T0; dev_dbg(sensor->dev, "periods=0x%x t=%d mC", periods, *temp); -- 2.17.1 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel