diff mbox series

[v5,7/9] thermal: exynos: split initialization of TMU and the thermal zone

Message ID 20231120145049.310509-8-m.majewski2@samsung.com (mailing list archive)
State New, archived
Headers show
Series Improve Exynos thermal driver | expand

Commit Message

Mateusz Majewski Nov. 20, 2023, 2:50 p.m. UTC 
This will be needed in the future, as the thermal zone subsystem might
call our callbacks right after devm_thermal_of_zone_register. Currently
we just make get_temp return EAGAIN in such case, but this will not be
possible with state-modifying callbacks, for instance set_trips.

Reviewed-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Signed-off-by: Mateusz Majewski <m.majewski2@samsung.com>
---
v3 -> v4: Reordered calls done while leaving exynos_tmu_initialize so
  that they mirror the calls done while entering this function.
v1 -> v2: We take clocks into account; exynos_tmu_initialize needs both
  clocks, as tmu_initialize might use the base_second registers. However,
  exynos_thermal_zone_configure only needs clk.

 drivers/thermal/samsung/exynos_tmu.c | 104 +++++++++++++++------------
 1 file changed, 60 insertions(+), 44 deletions(-)

Comments

Dan Carpenter Nov. 27, 2023, 7:20 a.m. UTC | #1 
Hi Mateusz,

kernel test robot noticed the following build warnings:

https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Mateusz-Majewski/thermal-exynos-remove-an-unnecessary-field-description/20231120-230641
base:   https://git.kernel.org/pub/scm/linux/kernel/git/rafael/linux-pm.git thermal
patch link:    https://lore.kernel.org/r/20231120145049.310509-8-m.majewski2%40samsung.com
patch subject: [PATCH v5 7/9] thermal: exynos: split initialization of TMU and the thermal zone
config: arm-randconfig-r081-20231123 (https://download.01.org/0day-ci/archive/20231125/202311251257.Fjn3kQH6-lkp@intel.com/config)
compiler: arm-linux-gnueabi-gcc (GCC) 13.2.0
reproduce: (https://download.01.org/0day-ci/archive/20231125/202311251257.Fjn3kQH6-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Reported-by: Dan Carpenter <error27@gmail.com>
| Closes: https://lore.kernel.org/r/202311251257.Fjn3kQH6-lkp@intel.com/

smatch warnings:
drivers/thermal/samsung/exynos_tmu.c:1064 exynos_tmu_probe() warn: missing unwind goto?
drivers/thermal/samsung/exynos_tmu.c:1103 exynos_tmu_probe() warn: 'data->clk' from clk_prepare() not released on lines: 1064.
drivers/thermal/samsung/exynos_tmu.c:1103 exynos_tmu_probe() warn: 'data->clk_sec' from clk_prepare() not released on lines: 1064.
drivers/thermal/samsung/exynos_tmu.c:1103 exynos_tmu_probe() warn: 'data->sclk' from clk_prepare_enable() not released on lines: 1064.

vim +1064 drivers/thermal/samsung/exynos_tmu.c

cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24   980  static int exynos_tmu_probe(struct platform_device *pdev)
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24   981  {
3b6a1a805f3424 drivers/thermal/samsung/exynos_tmu.c Lukasz Majewski          2015-01-23   982  	struct exynos_tmu_data *data;
3b6a1a805f3424 drivers/thermal/samsung/exynos_tmu.c Lukasz Majewski          2015-01-23   983  	int ret;
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24   984  
79e093c3fe9de9 drivers/thermal/exynos_thermal.c     Amit Daniel Kachhap      2012-08-16   985  	data = devm_kzalloc(&pdev->dev, sizeof(struct exynos_tmu_data),
79e093c3fe9de9 drivers/thermal/exynos_thermal.c     Amit Daniel Kachhap      2012-08-16   986  					GFP_KERNEL);
2a9675b39ad1af drivers/thermal/samsung/exynos_tmu.c Jingoo Han               2014-05-07   987  	if (!data)
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07   988  		return -ENOMEM;
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07   989  
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24   990  	platform_set_drvdata(pdev, data);
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24   991  	mutex_init(&data->lock);
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07   992  
824ead03b78403 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08   993  	/*
824ead03b78403 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08   994  	 * Try enabling the regulator if found
824ead03b78403 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08   995  	 * TODO: Add regulator as an SOC feature, so that regulator enable
824ead03b78403 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08   996  	 * is a compulsory call.
824ead03b78403 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08   997  	 */
ef1639e66e72af drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20   998  	ret = devm_regulator_get_enable_optional(&pdev->dev, "vtmu");
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20   999  	switch (ret) {
ef1639e66e72af drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1000  	case 0:
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1001  	case -ENODEV:
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1002  		break;
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1003  	case -EPROBE_DEFER:
ccb361d2fdda89 drivers/thermal/samsung/exynos_tmu.c Javier Martinez Canillas 2016-02-18  1004  		return -EPROBE_DEFER;
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1005  	default:
ef1639e66e72af drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1006  		dev_err(&pdev->dev, "Failed to get enabled regulator: %d\n",
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1007  			ret);
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1008  		return ret;
b2f20752180f71 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1009  	}
824ead03b78403 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1010  
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24  1011  	ret = exynos_map_dt_data(pdev);
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24  1012  	if (ret)
ef1639e66e72af drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1013  		return ret;
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1014  
2a16279c68bcfa drivers/thermal/exynos_thermal.c     Sachin Kamat             2013-04-18  1015  	data->clk = devm_clk_get(&pdev->dev, "tmu_apbif");
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1016  	if (IS_ERR(data->clk)) {
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1017  		dev_err(&pdev->dev, "Failed to get clock\n");
ef1639e66e72af drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1018  		return PTR_ERR(data->clk);
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1019  	}
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1020  
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1021  	data->clk_sec = devm_clk_get(&pdev->dev, "tmu_triminfo_apbif");
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1022  	if (IS_ERR(data->clk_sec)) {
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1023  		if (data->soc == SOC_ARCH_EXYNOS5420_TRIMINFO) {
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1024  			dev_err(&pdev->dev, "Failed to get triminfo clock\n");
ef1639e66e72af drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1025  			return PTR_ERR(data->clk_sec);
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1026  		}
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1027  	} else {
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1028  		ret = clk_prepare(data->clk_sec);
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1029  		if (ret) {
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1030  			dev_err(&pdev->dev, "Failed to get clock\n");
ef1639e66e72af drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1031  			return ret;
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1032  		}
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1033  	}
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1034  
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1035  	ret = clk_prepare(data->clk);
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1036  	if (ret) {
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1037  		dev_err(&pdev->dev, "Failed to get clock\n");
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1038  		goto err_clk_sec;
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1039  	}
2a16279c68bcfa drivers/thermal/exynos_thermal.c     Sachin Kamat             2013-04-18  1040  
488c7455d74ce0 drivers/thermal/samsung/exynos_tmu.c Chanwoo Choi             2015-03-10  1041  	switch (data->soc) {
488c7455d74ce0 drivers/thermal/samsung/exynos_tmu.c Chanwoo Choi             2015-03-10  1042  	case SOC_ARCH_EXYNOS5433:
488c7455d74ce0 drivers/thermal/samsung/exynos_tmu.c Chanwoo Choi             2015-03-10  1043  	case SOC_ARCH_EXYNOS7:
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1044  		data->sclk = devm_clk_get(&pdev->dev, "tmu_sclk");
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1045  		if (IS_ERR(data->sclk)) {
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1046  			dev_err(&pdev->dev, "Failed to get sclk\n");
02d438f62c05f0 drivers/thermal/samsung/exynos_tmu.c Dan Carpenter            2021-08-10  1047  			ret = PTR_ERR(data->sclk);
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1048  			goto err_clk;
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1049  		} else {
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1050  			ret = clk_prepare_enable(data->sclk);
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1051  			if (ret) {
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1052  				dev_err(&pdev->dev, "Failed to enable sclk\n");
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1053  				goto err_clk;
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1054  			}
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1055  		}
488c7455d74ce0 drivers/thermal/samsung/exynos_tmu.c Chanwoo Choi             2015-03-10  1056  		break;
488c7455d74ce0 drivers/thermal/samsung/exynos_tmu.c Chanwoo Choi             2015-03-10  1057  	default:
488c7455d74ce0 drivers/thermal/samsung/exynos_tmu.c Chanwoo Choi             2015-03-10  1058  		break;
baba1ebb99ba1f drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1059  	}
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1060  
9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1061  	ret = exynos_tmu_initialize(pdev);
9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1062  	if (ret) {
9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1063  		dev_err(&pdev->dev, "Failed to initialize TMU\n");
9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20 @1064  		return ret;

All these warnings are basically saying that this should be goto
err_sclk;

9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1065  	}
9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1066  
7ea98f70c73ea3 drivers/thermal/samsung/exynos_tmu.c Daniel Lezcano           2022-08-05  1067  	data->tzd = devm_thermal_of_zone_register(&pdev->dev, 0, data,
9e4249b4034090 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1068  						  &exynos_sensor_ops);
9e4249b4034090 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1069  	if (IS_ERR(data->tzd)) {
9e4249b4034090 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1070  		ret = PTR_ERR(data->tzd);
82bdde8ecdd7e5 drivers/thermal/samsung/exynos_tmu.c Marek Szyprowski         2020-02-28  1071  		if (ret != -EPROBE_DEFER)
82bdde8ecdd7e5 drivers/thermal/samsung/exynos_tmu.c Marek Szyprowski         2020-02-28  1072  			dev_err(&pdev->dev, "Failed to register sensor: %d\n",
82bdde8ecdd7e5 drivers/thermal/samsung/exynos_tmu.c Marek Szyprowski         2020-02-28  1073  				ret);
9e4249b4034090 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1074  		goto err_sclk;
9e4249b4034090 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1075  	}
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1076  
9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1077  	ret = exynos_thermal_zone_configure(pdev);
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1078  	if (ret) {
9f72236db6c75b drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1079  		dev_err(&pdev->dev, "Failed to configure the thermal zone\n");
7ea98f70c73ea3 drivers/thermal/samsung/exynos_tmu.c Daniel Lezcano           2022-08-05  1080  		goto err_sclk;
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1081  	}
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1082  
4147281723b2e6 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1083  	ret = devm_request_threaded_irq(&pdev->dev, data->irq, NULL,
4147281723b2e6 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1084  					exynos_tmu_threaded_irq,
4147281723b2e6 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1085  					IRQF_TRIGGER_RISING
4147281723b2e6 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1086  						| IRQF_SHARED | IRQF_ONESHOT,
4147281723b2e6 drivers/thermal/samsung/exynos_tmu.c Mateusz Majewski         2023-11-20  1087  					dev_name(&pdev->dev), data);
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24  1088  	if (ret) {
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24  1089  		dev_err(&pdev->dev, "Failed to request irq: %d\n", data->irq);
7ea98f70c73ea3 drivers/thermal/samsung/exynos_tmu.c Daniel Lezcano           2022-08-05  1090  		goto err_sclk;
cebe7373a7e659 drivers/thermal/samsung/exynos_tmu.c Amit Daniel Kachhap      2013-06-24  1091  	}
bbf63be4f33135 drivers/thermal/exynos_thermal.c     Jonghwa Lee              2012-11-21  1092  
3b6a1a805f3424 drivers/thermal/samsung/exynos_tmu.c Lukasz Majewski          2015-01-23  1093  	exynos_tmu_control(pdev, true);
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1094  	return 0;
9e4249b4034090 drivers/thermal/samsung/exynos_tmu.c Krzysztof Kozlowski      2015-10-08  1095  
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1096  err_sclk:
6c247393cfdd66 drivers/thermal/samsung/exynos_tmu.c Abhilash Kesavan         2015-01-27  1097  	clk_disable_unprepare(data->sclk);
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1098  err_clk:
2a16279c68bcfa drivers/thermal/exynos_thermal.c     Sachin Kamat             2013-04-18  1099  	clk_unprepare(data->clk);
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1100  err_clk_sec:
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1101  	if (!IS_ERR(data->clk_sec))
14a11dc7e0dbf4 drivers/thermal/samsung/exynos_tmu.c Naveen Krishna Chatradhi 2013-12-19  1102  		clk_unprepare(data->clk_sec);
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07 @1103  	return ret;
9d97e5c81e15af drivers/hwmon/exynos4_tmu.c          Donggeun Kim             2011-09-07  1104  }
diff mbox series

Patch

diff --git a/drivers/thermal/samsung/exynos_tmu.c b/drivers/thermal/samsung/exynos_tmu.c
index d918bf6d5359..6b3a7dd05c68 100644
--- a/drivers/thermal/samsung/exynos_tmu.c
+++ b/drivers/thermal/samsung/exynos_tmu.c
@@ -251,25 +251,8 @@  static void sanitize_temp_error(struct exynos_tmu_data *data, u32 trim_info)
 static int exynos_tmu_initialize(struct platform_device *pdev)
 {
 	struct exynos_tmu_data *data = platform_get_drvdata(pdev);
-	struct thermal_zone_device *tzd = data->tzd;
-	int num_trips = thermal_zone_get_num_trips(tzd);
 	unsigned int status;
-	int ret = 0, temp;
-
-	ret = thermal_zone_get_crit_temp(tzd, &temp);
-	if (ret && data->soc != SOC_ARCH_EXYNOS5433) { /* FIXME */
-		dev_err(&pdev->dev,
-			"No CRITICAL trip point defined in device tree!\n");
-		goto out;
-	}
-
-	if (num_trips > data->ntrip) {
-		dev_info(&pdev->dev,
-			 "More trip points than supported by this TMU.\n");
-		dev_info(&pdev->dev,
-			 "%d trip points should be configured in polling mode.\n",
-			 num_trips - data->ntrip);
-	}
+	int ret = 0;
 
 	mutex_lock(&data->lock);
 	clk_enable(data->clk);
@@ -280,32 +263,63 @@  static int exynos_tmu_initialize(struct platform_device *pdev)
 	if (!status) {
 		ret = -EBUSY;
 	} else {
-		int i, ntrips =
-			min_t(int, num_trips, data->ntrip);
-
 		data->tmu_initialize(pdev);
-
-		/* Write temperature code for rising and falling threshold */
-		for (i = 0; i < ntrips; i++) {
-
-			struct thermal_trip trip;
-
-			ret = thermal_zone_get_trip(tzd, i, &trip);
-			if (ret)
-				goto err;
-
-			data->tmu_set_trip_temp(data, i, trip.temperature / MCELSIUS);
-			data->tmu_set_trip_hyst(data, i, trip.temperature / MCELSIUS,
-						trip.hysteresis / MCELSIUS);
-		}
-
 		data->tmu_clear_irqs(data);
 	}
+
+	if (!IS_ERR(data->clk_sec))
+		clk_disable(data->clk_sec);
+	clk_disable(data->clk);
+	mutex_unlock(&data->lock);
+
+	return ret;
+}
+
+static int exynos_thermal_zone_configure(struct platform_device *pdev)
+{
+	struct exynos_tmu_data *data = platform_get_drvdata(pdev);
+	struct thermal_zone_device *tzd = data->tzd;
+	int i, num_trips = thermal_zone_get_num_trips(tzd);
+	int ret = 0, temp;
+
+	ret = thermal_zone_get_crit_temp(tzd, &temp);
+
+	if (ret && data->soc != SOC_ARCH_EXYNOS5433) { /* FIXME */
+		dev_err(&pdev->dev,
+			"No CRITICAL trip point defined in device tree!\n");
+		goto out;
+	}
+
+	mutex_lock(&data->lock);
+
+	if (num_trips > data->ntrip) {
+		dev_info(&pdev->dev,
+			 "More trip points than supported by this TMU.\n");
+		dev_info(&pdev->dev,
+			 "%d trip points should be configured in polling mode.\n",
+			 num_trips - data->ntrip);
+	}
+
+	clk_enable(data->clk);
+
+	num_trips = min_t(int, num_trips, data->ntrip);
+
+	/* Write temperature code for rising and falling threshold */
+	for (i = 0; i < num_trips; i++) {
+		struct thermal_trip trip;
+
+		ret = thermal_zone_get_trip(tzd, i, &trip);
+		if (ret)
+			goto err;
+
+		data->tmu_set_trip_temp(data, i, trip.temperature / MCELSIUS);
+		data->tmu_set_trip_hyst(data, i, trip.temperature / MCELSIUS,
+					trip.hysteresis / MCELSIUS);
+	}
+
 err:
 	clk_disable(data->clk);
 	mutex_unlock(&data->lock);
-	if (!IS_ERR(data->clk_sec))
-		clk_disable(data->clk_sec);
 out:
 	return ret;
 }
@@ -1044,10 +1058,12 @@  static int exynos_tmu_probe(struct platform_device *pdev)
 		break;
 	}
 
-	/*
-	 * data->tzd must be registered before calling exynos_tmu_initialize(),
-	 * requesting irq and calling exynos_tmu_control().
-	 */
+	ret = exynos_tmu_initialize(pdev);
+	if (ret) {
+		dev_err(&pdev->dev, "Failed to initialize TMU\n");
+		return ret;
+	}
+
 	data->tzd = devm_thermal_of_zone_register(&pdev->dev, 0, data,
 						  &exynos_sensor_ops);
 	if (IS_ERR(data->tzd)) {
@@ -1058,9 +1074,9 @@  static int exynos_tmu_probe(struct platform_device *pdev)
 		goto err_sclk;
 	}
 
-	ret = exynos_tmu_initialize(pdev);
+	ret = exynos_thermal_zone_configure(pdev);
 	if (ret) {
-		dev_err(&pdev->dev, "Failed to initialize TMU\n");
+		dev_err(&pdev->dev, "Failed to configure the thermal zone\n");
 		goto err_sclk;
 	}