On Thu, Apr 02, 2015 at 04:49:07PM +0200, Pavel Machek wrote: > > > This adds support for OMAP3 chips to ti-soc-thermal. As requested by > TI people, it is marked unreliable and warning is printed. > > Signed-off-by: Pavel Machek <pavel@xxxxxx> > > --- > > Patch is against thermal linus tree, please apply so that it has > chance for 4.1. > > v2: fixed min/max temp > > diff --git a/drivers/thermal/ti-soc-thermal/Kconfig b/drivers/thermal/ti-soc-thermal/Kconfig > index bd4c7be..d414c2d 100644 > --- a/drivers/thermal/ti-soc-thermal/Kconfig > +++ b/drivers/thermal/ti-soc-thermal/Kconfig > @@ -21,6 +21,21 @@ config TI_THERMAL > This includes trip points definitions, extrapolation rules and > CPU cooling device bindings. > > +config OMAP3_THERMAL > + bool "Texas Instruments OMAP3 thermal support" > + depends on TI_SOC_THERMAL > + depends on ARCH_OMAP3 > + help > + If you say yes here you get thermal support for the Texas Instruments > + OMAP3 SoC family. The current chips supported are: > + - OMAP3430 > + > + OMAP3 chips normally don't need thermal management, and sensors in > + this generation are not accurate, nor they are very close to > + the important hotspots. > + > + Say 'N' here. > + > config OMAP4_THERMAL > bool "Texas Instruments OMAP4 thermal support" > depends on TI_SOC_THERMAL > diff --git a/drivers/thermal/ti-soc-thermal/Makefile b/drivers/thermal/ti-soc-thermal/Makefile > index 1226b24..0f89bdf 100644 > --- a/drivers/thermal/ti-soc-thermal/Makefile > +++ b/drivers/thermal/ti-soc-thermal/Makefile > @@ -2,5 +2,6 @@ obj-$(CONFIG_TI_SOC_THERMAL) += ti-soc-thermal.o > ti-soc-thermal-y := ti-bandgap.o > ti-soc-thermal-$(CONFIG_TI_THERMAL) += ti-thermal-common.o > ti-soc-thermal-$(CONFIG_DRA752_THERMAL) += dra752-thermal-data.o > +ti-soc-thermal-$(CONFIG_OMAP3_THERMAL) += omap3-thermal-data.o > ti-soc-thermal-$(CONFIG_OMAP4_THERMAL) += omap4-thermal-data.o > ti-soc-thermal-$(CONFIG_OMAP5_THERMAL) += omap5-thermal-data.o > diff --git a/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c b/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c > new file mode 100644 > index 0000000..86a4e2d > --- /dev/null > +++ b/drivers/thermal/ti-soc-thermal/omap3-thermal-data.c > @@ -0,0 +1,103 @@ > +/* > + * OMAP3 thermal driver. > + * > + * Copyright (C) 2011-2012 Texas Instruments Inc. > + * Copyright (C) 2014 Pavel Machek <pavel@xxxxxx> > + * > + * This software is licensed under the terms of the GNU General Public > + * License version 2, as published by the Free Software Foundation, and > + * may be copied, distributed, and modified under those terms. > + * > + * This program is distributed in the hope that it will be useful, > + * but WITHOUT ANY WARRANTY; without even the implied warranty of > + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the > + * GNU General Public License for more details. > + * > + * Note > + * http://www.ti.com/lit/er/sprz278f/sprz278f.pdf "Advisory > + * 3.1.1.186 MMC OCP Clock Not Gated When Thermal Sensor Is Used" > + * > + * Also TI says: > + * Just be careful when you try to make thermal policy like decisions > + * based on this sensor. Placement of the sensor w.r.t the actual logic > + * generating heat has to be a factor as well. If you are just looking > + * for an approximation temperature (thermometerish kind), you might be > + * ok with this. I am not sure we'd find any TI data around this.. just a > + * heads up. > + */ > + > +#include "ti-thermal.h" > +#include "ti-bandgap.h" > + > +/* > + * OMAP34XX has one instance of thermal sensor for MPU > + * need to describe the individual bit fields > + */ > +static struct temp_sensor_registers > +omap34xx_mpu_temp_sensor_registers = { > + .temp_sensor_ctrl = 0, > + .bgap_soc_mask = BIT(8), > + .bgap_eocz_mask = BIT(7), > + .bgap_dtemp_mask = 0x7f, > + > + .bgap_mode_ctrl = 0, > + .mode_ctrl_mask = BIT(9), > +}; > + > +/* Thresholds and limits for OMAP34XX MPU temperature sensor */ > +static struct temp_sensor_data omap34xx_mpu_temp_sensor_data = { > + .min_freq = 32768, > + .max_freq = 32768, > + .max_temp = 125000, > + .min_temp = -40000, > + .hyst_val = 5000, > +}; > + > +/* > + * Temperature values in milli degree celsius > + */ > +static const int > +omap34xx_adc_to_temp[128] = { > + -40000, -40000, -40000, -40000, -40000, -39000, -38000, -36000, > + -34000, -32000, -31000, -29000, -28000, -26000, -25000, -24000, > + -22000, -21000, -19000, -18000, -17000, -15000, -14000, -12000, > + -11000, -9000, -8000, -7000, -5000, -4000, -2000, -1000, 0000, > + 1000, 3000, 4000, 5000, 7000, 8000, 10000, 11000, 13000, 14000, > + 15000, 17000, 18000, 20000, 21000, 22000, 24000, 25000, 27000, > + 28000, 30000, 31000, 32000, 34000, 35000, 37000, 38000, 39000, > + 41000, 42000, 44000, 45000, 47000, 48000, 49000, 51000, 52000, > + 53000, 55000, 56000, 58000, 59000, 60000, 62000, 63000, 65000, > + 66000, 67000, 69000, 70000, 72000, 73000, 74000, 76000, 77000, > + 79000, 80000, 81000, 83000, 84000, 85000, 87000, 88000, 89000, > + 91000, 92000, 94000, 95000, 96000, 98000, 99000, 100000, > + 102000, 103000, 105000, 106000, 107000, 109000, 110000, 111000, > + 113000, 114000, 116000, 117000, 118000, 120000, 121000, 122000, > + 124000, 124000, 125000, 125000, 125000, 125000, 125000 > +}; > + > +/* OMAP34XX data */ > +const struct ti_bandgap_data omap34xx_data = { > + .features = TI_BANDGAP_FEATURE_CLK_CTRL | TI_BANDGAP_FEATURE_UNRELIABLE, > + .fclock_name = "ts_fck", > + .div_ck_name = "ts_fck", > + .conv_table = omap34xx_adc_to_temp, > + .adc_start_val = 0, > + .adc_end_val = 127, > + .expose_sensor = ti_thermal_expose_sensor, > + .remove_sensor = ti_thermal_remove_sensor, > + > + .sensors = { > + { > + .registers = &omap34xx_mpu_temp_sensor_registers, > + .ts_data = &omap34xx_mpu_temp_sensor_data, > + .domain = "cpu", > + .slope = 0, > + .constant = 20000, > + .slope_pcb = 0, > + .constant_pcb = 20000, > + .register_cooling = NULL, > + .unregister_cooling = NULL, > + }, > + }, > + .sensor_count = 1, > +}; > diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.c b/drivers/thermal/ti-soc-thermal/ti-bandgap.c > index 63e2f5c..a58610d 100644 > --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.c > +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.c > @@ -1200,6 +1195,10 @@ int ti_bandgap_probe(struct platform_device *pdev) > } > bgp->dev = &pdev->dev; > > + if (TI_BANDGAP_HAS(bgp, UNRELIABLE)) > + dev_warn(&pdev->dev, > + "OMAP3 thermal sensor is unreliable and normally unneccessary\n"); For now we have only one unreliable sensor. But once one is in, I am pretty sure other people will ask for more :-). Therefore, I am accepting this patch but with the message like this: + dev_warn(&pdev->dev, + "This OMAP thermal sensor is unreliable. You've been warned\n"); > + > if (TI_BANDGAP_HAS(bgp, TSHUT)) { > ret = ti_bandgap_tshut_init(bgp, pdev); > if (ret) { > @@ -1505,6 +1504,12 @@ static SIMPLE_DEV_PM_OPS(ti_bandgap_dev_pm_ops, ti_bandgap_suspend, > #endif > > static const struct of_device_id of_ti_bandgap_match[] = { > +#ifdef CONFIG_OMAP3_THERMAL > + { > + .compatible = "ti,omap34xx-bandgap", > + .data = (void *)&omap34xx_data, > + }, > +#endif > #ifdef CONFIG_OMAP4_THERMAL > { > .compatible = "ti,omap4430-bandgap", > diff --git a/drivers/thermal/ti-soc-thermal/ti-bandgap.h b/drivers/thermal/ti-soc-thermal/ti-bandgap.h > index b3adf72..15878a1 100644 > --- a/drivers/thermal/ti-soc-thermal/ti-bandgap.h > +++ b/drivers/thermal/ti-soc-thermal/ti-bandgap.h > @@ -331,6 +331,7 @@ struct ti_temp_sensor { > #define TI_BANDGAP_FEATURE_FREEZE_BIT BIT(7) > #define TI_BANDGAP_FEATURE_COUNTER_DELAY BIT(8) > #define TI_BANDGAP_FEATURE_HISTORY_BUFFER BIT(9) > +#define TI_BANDGAP_FEATURE_UNRELIABLE BIT(10) > #define TI_BANDGAP_HAS(b, f) \ > ((b)->conf->features & TI_BANDGAP_FEATURE_ ## f) > > @@ -384,6 +385,12 @@ int ti_bandgap_set_sensor_data(struct ti_bandgap *bgp, int id, void *data); > void *ti_bandgap_get_sensor_data(struct ti_bandgap *bgp, int id); > int ti_bandgap_get_trend(struct ti_bandgap *bgp, int id, int *trend); > > +#ifdef CONFIG_OMAP3_THERMAL > +extern const struct ti_bandgap_data omap34xx_data; > +#else > +#define omap34xx_data NULL > +#endif > + > #ifdef CONFIG_OMAP4_THERMAL > extern const struct ti_bandgap_data omap4430_data; > extern const struct ti_bandgap_data omap4460_data; > diff --git a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt > index 0c9222d..3cf8a3b 100644 > --- a/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt > +++ b/Documentation/devicetree/bindings/thermal/ti_soc_thermal.txt > @@ -10,6 +10,7 @@ to the silicon temperature. > > Required properties: > - compatible : Should be: > + - "ti,omap34xx-bandgap" : for OMAP34xx bandgap > - "ti,omap4430-bandgap" : for OMAP4430 bandgap > - "ti,omap4460-bandgap" : for OMAP4460 bandgap > - "ti,omap4470-bandgap" : for OMAP4470 bandgap > > > -- > (english) http://www.livejournal.com/~pavelmachek > (cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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