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From: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
To: Zhang Rui <rui.zhang@intel.com>, Eduardo Valentin <edubezval@gmail.com>
Cc: Amit kucheria <amit.kucheria@linaro.org>,
	Eric Anholt <eric@anholt.net>,
	Stefan Wahren <stefan.wahren@i2se.com>,
	Markus Mayer <mmayer@broadcom.com>,
	bcm-kernel-feedback-list@broadcom.com,
	Heiko Stuebner <heiko@sntech.de>,
	Thierry Reding <thierry.reding@gmail.com>,
	Jonathan Hunter <jonathanh@nvidia.com>,
	Keerthy <j-keerthy@ti.com>,
	Masahiro Yamada <yamada.masahiro@socionext.com>,
	Jun Nie <jun.nie@linaro.org>, Baoyou Xie <baoyou.xie@linaro.org>,
	Shawn Guo <shawnguo@kernel.org>,
	linux-pm@vger.kernel.org, linux-kernel@vger.kernel.org,
	b.zolnierkie@samsung.com
Subject: [PATCH v2 17/17] thermal: warn on attempts to read temperature on disabled sensors
Date: Wed, 17 Oct 2018 17:52:43 +0200	[thread overview]
Message-ID: <1539791563-5959-18-git-send-email-b.zolnierkie@samsung.com> (raw)
In-Reply-To: <1539791563-5959-1-git-send-email-b.zolnierkie@samsung.com>

* Add ops_of_thermal flag to struct thermal_zone_device_ops and
  set it in of-thermal.c.

* Add checking sensor mode for drivers using of-thermal.c to
  thermal_zone_get_temp() (print a warning if sensor is disabled).

Signed-off-by: Bartlomiej Zolnierkiewicz <b.zolnierkie@samsung.com>
---
 drivers/thermal/of-thermal.c      |  2 ++
 drivers/thermal/thermal_helpers.c | 12 ++++++++++++
 include/linux/thermal.h           |  1 +
 3 files changed, 15 insertions(+)

diff --git a/drivers/thermal/of-thermal.c b/drivers/thermal/of-thermal.c
index 523ac5c..912bd85 100644
--- a/drivers/thermal/of-thermal.c
+++ b/drivers/thermal/of-thermal.c
@@ -378,6 +378,8 @@ static int of_thermal_get_crit_temp(struct thermal_zone_device *tz,
 
 	.bind = of_thermal_bind,
 	.unbind = of_thermal_unbind,
+
+	.ops_of_thermal = true,
 };
 
 /***   sensor API   ***/
diff --git a/drivers/thermal/thermal_helpers.c b/drivers/thermal/thermal_helpers.c
index 14b7a7e..12d1f53 100644
--- a/drivers/thermal/thermal_helpers.c
+++ b/drivers/thermal/thermal_helpers.c
@@ -84,6 +84,18 @@ int thermal_zone_get_temp(struct thermal_zone_device *tz, int *temp)
 	if (!tz || IS_ERR(tz) || !tz->ops->get_temp)
 		goto exit;
 
+	if (tz->ops->ops_of_thermal) {
+		enum thermal_device_mode mode;
+
+		ret = tz->ops->get_mode(tz, &mode);
+		if (ret)
+			goto exit;
+
+		if (mode == THERMAL_DEVICE_DISABLED)
+			dev_warn_once(&tz->device,
+				 "trying to read out disabled thermal zone\n");
+	}
+
 	mutex_lock(&tz->lock);
 
 	ret = tz->ops->get_temp(tz, temp);
diff --git a/include/linux/thermal.h b/include/linux/thermal.h
index 92c460e..2215e11 100644
--- a/include/linux/thermal.h
+++ b/include/linux/thermal.h
@@ -115,6 +115,7 @@ struct thermal_zone_device_ops {
 		       enum thermal_trip_type);
 
 	bool set_mode_skip_check;
+	bool ops_of_thermal;
 };
 
 struct thermal_cooling_device_ops {
-- 
1.9.1


  parent reply	other threads:[~2018-10-17 15:55 UTC|newest]

Thread overview: 27+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
     [not found] <CGME20181017155314epcas2p4a5aa24978b36354a2ccb2f9b0fb6f0f6@epcas2p4.samsung.com>
2018-10-17 15:52 ` [PATCH v2 00/17] thermal: enable+check sensor after its setup is finished Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155320epcas2p439b713149d94aa485b3c2ffba063ea03@epcas2p4.samsung.com>
2018-10-17 15:52     ` [PATCH v2 01/17] thermal: add thermal_zone_set_mode() helper Bartlomiej Zolnierkiewicz
2018-11-06  8:11       ` Zhang Rui
2018-11-06 16:11         ` Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155326epcas2p21d8b703f27fe54561a0f741fa7920dce@epcas2p2.samsung.com>
2018-10-17 15:52     ` [PATCH v2 02/17] thermal: add thermal_zone_device_check() helper Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155332epcas2p499ac9d53678d82a9984b3533e723a0dd@epcas2p4.samsung.com>
2018-10-17 15:52     ` [PATCH v2 03/17] thermal: separate sensor enable and check operations Bartlomiej Zolnierkiewicz
2018-10-26 12:11       ` Amit Kucheria
     [not found]   ` <CGME20181017155338epcas1p3a22cd0b22e757c3e51eb72ccee545478@epcas1p3.samsung.com>
2018-10-17 15:52     ` [PATCH v2 04/17] thermal: separate sensor registration and enable+check operations Bartlomiej Zolnierkiewicz
2018-10-31 12:40       ` Amit Kucheria
     [not found]   ` <CGME20181017155345epcas1p18dee37b9a46f2bf0b68aa3ded43f2717@epcas1p1.samsung.com>
2018-10-17 15:52     ` [PATCH v2 05/17] thermal: bcm2835: enable+check sensor after its setup is finished Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155351epcas1p171637911ef29cdec96dda648cfac51a5@epcas1p1.samsung.com>
2018-10-17 15:52     ` [PATCH v2 06/17] thermal: brcmstb: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155357epcas1p3900b1d3522c636fdee27ab9928c076e1@epcas1p3.samsung.com>
2018-10-17 15:52     ` [PATCH v2 07/17] thermal: hisi_thermal: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155403epcas2p1ed9777e96c6b2c77c2c5b67466be9843@epcas2p1.samsung.com>
2018-10-17 15:52     ` [PATCH v2 08/17] thermal: qcom: tsens: " Bartlomiej Zolnierkiewicz
2018-10-26 12:11       ` Amit Kucheria
2018-10-26 12:39         ` Amit Kucheria
     [not found]   ` <CGME20181017155409epcas2p41b5770668abdb4af99646841a3dd24ec@epcas2p4.samsung.com>
2018-10-17 15:52     ` [PATCH v2 09/17] thermal: qoriq: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155416epcas2p32f63571e9c06cd1aba2b40bcf23de8e1@epcas2p3.samsung.com>
2018-10-17 15:52     ` [PATCH v2 10/17] thermal: rcar_gen3_thermal: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155422epcas1p1644d897c62ceb36b57d33ecd4e3bc81c@epcas1p1.samsung.com>
2018-10-17 15:52     ` [PATCH v2 11/17] thermal: rockchip_thermal: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155428epcas2p1aca0b5e7b30b89db7be7026dfa740fc6@epcas2p1.samsung.com>
2018-10-17 15:52     ` [PATCH v2 12/17] thermal: exynos: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155434epcas1p33a6de1fda3c69cc966f954796a95a935@epcas1p3.samsung.com>
2018-10-17 15:52     ` [PATCH v2 13/17] thermal: tegra: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155440epcas1p12c33048a8c1c083496d1a8996591d884@epcas1p1.samsung.com>
2018-10-17 15:52     ` [PATCH v2 14/17] thermal: ti-soc-thermal: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155447epcas2p2db761f6575de357b65eb5e39b709fead@epcas2p2.samsung.com>
2018-10-17 15:52     ` [PATCH v2 15/17] thermal: uniphier: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155453epcas1p3be6976375c18583bcbebc7ff7853ae50@epcas1p3.samsung.com>
2018-10-17 15:52     ` [PATCH v2 16/17] thermal: zx2967: " Bartlomiej Zolnierkiewicz
     [not found]   ` <CGME20181017155459epcas1p470bd73f433cdbb0f7a11aa8d46212e4e@epcas1p4.samsung.com>
2018-10-17 15:52     ` Bartlomiej Zolnierkiewicz [this message]
     [not found]   ` <1541387097.2124.9.camel@intel.com>
2018-11-05 16:35     ` [PATCH v2 00/17] thermal: " Bartlomiej Zolnierkiewicz
2018-11-06  0:46       ` Eduardo Valentin
2018-11-06  7:34       ` Zhang Rui

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