Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933126Ab3CZLfF (ORCPT ); Tue, 26 Mar 2013 07:35:05 -0400 Received: from mail-pa0-f44.google.com ([209.85.220.44]:52142 "EHLO mail-pa0-f44.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1757642Ab3CZLfA (ORCPT ); Tue, 26 Mar 2013 07:35:00 -0400 From: Amit Daniel Kachhap To: linux-pm@vger.kernel.org Cc: Thomas Abraham , Zhang Rui , linux-samsung-soc@vger.kernel.org, linux-kernel@vger.kernel.org, amit.kachhap@gmail.com, Kukjin Kim Subject: [PATCH 8/9] thermal: exynos: Parse the platform data from the device tree. Date: Tue, 26 Mar 2013 17:04:01 +0530 Message-Id: <1364297642-2746-9-git-send-email-amit.daniel@samsung.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1364297642-2746-1-git-send-email-amit.daniel@samsung.com> References: <1364297642-2746-1-git-send-email-amit.daniel@samsung.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 8391 Lines: 255 This patch adds code to parse the DT based platform data like threshold temp, sensor configuration parameters like gain, reference voltages, calibration modes etc. Signed-off-by: Amit Daniel Kachhap --- .../bindings/thermal/exynos5440-thermal.txt | 93 ++++++++++++++++++++ drivers/thermal/samsung/exynos5440_thermal.c | 5 +- drivers/thermal/samsung/exynos_common.c | 92 +++++++++++++++++++ drivers/thermal/samsung/exynos_common.h | 2 + 4 files changed, 189 insertions(+), 3 deletions(-) create mode 100644 Documentation/devicetree/bindings/thermal/exynos5440-thermal.txt diff --git a/Documentation/devicetree/bindings/thermal/exynos5440-thermal.txt b/Documentation/devicetree/bindings/thermal/exynos5440-thermal.txt new file mode 100644 index 0000000..1ad2dee --- /dev/null +++ b/Documentation/devicetree/bindings/thermal/exynos5440-thermal.txt @@ -0,0 +1,93 @@ + +Exynos5440 TMU driver +------------------- + +Exynos5440 SoC Thermal Sensor driver for CPU temperature measurement and +performing cooling actions. + +Required properties: +- interrupts: Interrupt to know the threshold change interrupts. +- clocks: phandle of the clock from common clock binding. More description can + be found in Documentation/devicetree/bindings/clock/clock-bindings.txt. +- clock-name: clock name as used in the clock fetch. +- tmu-ctrl-data: phandle of the TMU controller configuration data. Its member + description is shown below, +- gain: A factor describing the gain of amplifier. The value varies between + 0-15. +- reference-voltage: A factor describing the reference volt to amplifier. The + value varies between 0-31. +- noise-cancel-mode: This value selects thermal tripping mode. The possible + values can be, + 0: Use current temp. + 4: Use current temp and past 4 temp values. + 5: Use current temp and past 8 temp values. + 6: Use current temp and past 12 temp values. + 7: Use current temp and past 16 temp values. +-cal-type: This value selects temperature calibration mode. The possible values + can be, + 0: No calibration. + 1: 1 point trimming method at 25 C. + 2: 1 point trimming method at 85 C. + 3: 2 point trimming method. +-cal-mode: This value selects hw/sw mode calibration. The possible values can be, + 0: Software calibration. + 1: Hardware calibration. + +Optional properties: +-efuse-value: This value should be used when the controller does not contain + valid fused temperature data needed for calibration. This is a 16 bit + value. +-threshold-falling: This value defines the falling threshold when it is added to + trip threshold. If this value is not supplied then rising and falling + threshold are same. + +-trip@: This node is added to define the trip properties. The trip members are + shown below, +-trip: This field defines the trip ID. Exynos5440 has 5 trip ID. +-trigger-temp: Temperature at which threshold trigger is fired. Its unit is + celsius. +-type: This denotes the type of trigger. The possible values are, + 0: active trip type + 1: critical + 2: hw system trip +-frequency-max: cpu frequency when this trip is reached. + +Example: +-------- + tmu_ctrl_info: tmu-ctrl-info { + gain = <8>; + reference-voltage = <16>; + noise-cancel-mode = <4>; + cal-type = <0>; + cal-mode = <0>; + efuse-value = <0xabcd>; + threshold-falling = <5>; + + trip@0{ + trip = <0>; + trigger-temp = <80>; + type = <0>; + frequency-max = <1200000>; + }; + + trip@3{ + trip = <3>; + trigger-temp = <110>; + type = <1>; + }; + + trip@4{ + trip = <4>; + trigger-temp = <120>; + type = <2>; + }; + }; + + tmuctrl_0: tmuctrl@160118 { + compatible = "samsung,exynos5440-tmu"; + reg = <0x160118 0x300>; + interrupts = <0 58 0>; + clocks = <&clock 8>; + clock-names = "tmu_apbif"; + tmu-ctrl-data = <&tmu_ctrl_info>; + }; diff --git a/drivers/thermal/samsung/exynos5440_thermal.c b/drivers/thermal/samsung/exynos5440_thermal.c index a3c75d3..c140e8c 100644 --- a/drivers/thermal/samsung/exynos5440_thermal.c +++ b/drivers/thermal/samsung/exynos5440_thermal.c @@ -564,9 +564,8 @@ static int exynos_tmu_probe(struct platform_device *pdev) return -ENOMEM; } - pdata = (struct exynos_tmu_platform_data *) - platform_get_device_id(pdev)->driver_data; - if (!pdata) { + pdata = exynos_parse_tmu_dt_data(pdev); + if (!pdata || IS_ERR(pdata)) { dev_err(&pdev->dev, "No platform init data supplied.\n"); return -ENODEV; } diff --git a/drivers/thermal/samsung/exynos_common.c b/drivers/thermal/samsung/exynos_common.c index 0c0098d..345284c 100644 --- a/drivers/thermal/samsung/exynos_common.c +++ b/drivers/thermal/samsung/exynos_common.c @@ -27,7 +27,9 @@ #include #include #include +#include #include +#include #include #include #include "exynos_common.h" @@ -421,3 +423,93 @@ void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf) kfree(th_zone); pr_info("Exynos: Kernel Thermal[%d] management unregistered\n", id); } + +struct exynos_tmu_platform_data * + exynos_parse_tmu_dt_data(struct platform_device *pdev) +{ + int ret; + struct device_node *np, *cn; + struct exynos_tmu_platform_data *pdata; + unsigned int val, trip; + + if (!pdev->dev.of_node) + return ERR_PTR(-ENODEV); + + pdata = devm_kzalloc(&pdev->dev, sizeof(*pdata), GFP_KERNEL); + if (!pdata) + return ERR_PTR(-ENOMEM); + + np = of_parse_phandle(pdev->dev.of_node, "tmu-ctrl-data", 0); + if (!np) { + ret = -ENODEV; + goto err_parse_dt; + } + + /* Parse compulsory parameters */ + ret = of_property_read_u32(np, "gain", &val); + if (ret) + goto err_parse_dt; + pdata->gain = val; + + ret = of_property_read_u32(np, "reference-voltage", &val); + if (ret) + goto err_parse_dt; + pdata->reference_voltage = val; + + ret = of_property_read_u32(np, "noise-cancel-mode", &val); + if (ret) + goto err_parse_dt; + pdata->noise_cancel_mode = val; + + ret = of_property_read_u32(np, "cal-type", &val); + if (ret) + goto err_parse_dt; + pdata->cal_type = val; + + ret = of_property_read_u32(np, "cal-mode", &val); + if (ret) + goto err_parse_dt; + pdata->cal_mode = val; + + /* Parse optional parameters */ + ret = of_property_read_u32(np, "efuse-value", &val); + if (!ret) + pdata->efuse_value = val; + + ret = of_property_read_u32(np, "threshold-falling", &val); + if (!ret) + pdata->threshold_falling = val; + + for (cn = NULL ; (cn = of_get_next_child(np, cn));) { + /* Parse compulsory child parameters */ + ret = of_property_read_u32(cn, "trip", &trip); + if (ret || trip > MAX_TRIP) + goto err_parse_dt; + + ret = of_property_read_u32(cn, "trigger-temp", &val); + if (ret || !val) + goto err_parse_dt; + pdata->trigger_levels[trip] = val; + + ret = of_property_read_u32(cn, "type", &val); + if (ret || val > HW_TRIP) + goto err_parse_dt; + pdata->trigger_type[trip] = val; + + /* Parse optional child parameters */ + ret = of_property_read_u32(cn, "frequency-max", &val); + if (!ret && val) { + pdata->freq_tab[pdata->freq_tab_count].freq_clip_max + = val; + pdata->freq_tab[pdata->freq_tab_count].temp_level + = pdata->trigger_levels[trip]; + pdata->freq_tab_count++; + } + pdata->trigger_enable[trip] = true; + } + return pdata; + +err_parse_dt: + dev_err(&pdev->dev, "Parsing TMU device tree data error.\n"); + return ERR_PTR(ret); +} diff --git a/drivers/thermal/samsung/exynos_common.h b/drivers/thermal/samsung/exynos_common.h index 453e09a..5ca640b 100644 --- a/drivers/thermal/samsung/exynos_common.h +++ b/drivers/thermal/samsung/exynos_common.h @@ -69,4 +69,6 @@ void exynos_unregister_thermal(struct thermal_sensor_conf *sensor_conf); int exynos_register_thermal(struct thermal_sensor_conf *sensor_conf); void exynos_report_trigger(struct thermal_sensor_conf *sensor_conf); int exynos_get_frequency_level(unsigned int cpu, unsigned int freq); +struct exynos_tmu_platform_data * + exynos_parse_tmu_dt_data(struct platform_device *pdev); #endif /* _LINUX_EXYNOS_COMMON_H */ -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/