445eaf871b
This patch has the common thermal framework support for OMAP bandgap driver. It includes the zone registration and unregistration, the cpu cooling and the trip definitions. The trips definition is essentially one trip for passive cooling using the generic cpu cooling device and another one for thermal shutdown. The cpu cooling device is built based on the existing cpu freq table. The build should be agnostic to omap version, but relies that cpufreq is up and running by the time the driver registers the cpu cooling, as it relies on the table walk api from cpufreq. Signed-off-by: Eduardo Valentin <eduardo.valentin@ti.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
109 lines
3.2 KiB
C
109 lines
3.2 KiB
C
/*
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* OMAP thermal definitions
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*
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* Copyright (C) 2012 Texas Instruments Incorporated - http://www.ti.com/
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* Contact:
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* Eduardo Valentin <eduardo.valentin@ti.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*
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*/
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#ifndef __OMAP_THERMAL_H
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#define __OMAP_THERMAL_H
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#include "omap-bandgap.h"
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/* sensors gradient and offsets */
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#define OMAP_GRADIENT_SLOPE_4460 348
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#define OMAP_GRADIENT_CONST_4460 -9301
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#define OMAP_GRADIENT_SLOPE_4470 308
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#define OMAP_GRADIENT_CONST_4470 -7896
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#define OMAP_GRADIENT_SLOPE_5430_CPU 196
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#define OMAP_GRADIENT_CONST_5430_CPU -6822
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#define OMAP_GRADIENT_SLOPE_5430_GPU 64
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#define OMAP_GRADIENT_CONST_5430_GPU 978
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/* PCB sensor calculation constants */
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#define OMAP_GRADIENT_SLOPE_W_PCB_4460 1142
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#define OMAP_GRADIENT_CONST_W_PCB_4460 -393
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#define OMAP_GRADIENT_SLOPE_W_PCB_4470 1063
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#define OMAP_GRADIENT_CONST_W_PCB_4470 -477
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#define OMAP_GRADIENT_SLOPE_W_PCB_5430_CPU 469
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#define OMAP_GRADIENT_CONST_W_PCB_5430_CPU -1272
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#define OMAP_GRADIENT_SLOPE_W_PCB_5430_GPU 378
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#define OMAP_GRADIENT_CONST_W_PCB_5430_GPU 154
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/* trip points of interest in milicelsius (at hotspot level) */
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#define OMAP_TRIP_COLD 100000
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#define OMAP_TRIP_HOT 110000
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#define OMAP_TRIP_SHUTDOWN 125000
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#define OMAP_TRIP_NUMBER 2
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#define OMAP_TRIP_STEP \
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((OMAP_TRIP_SHUTDOWN - OMAP_TRIP_HOT) / (OMAP_TRIP_NUMBER - 1))
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/* Update rates */
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#define FAST_TEMP_MONITORING_RATE 250
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/* helper macros */
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/**
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* omap_thermal_get_trip_value - returns trip temperature based on index
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* @i: trip index
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*/
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#define omap_thermal_get_trip_value(i) \
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(OMAP_TRIP_HOT + ((i) * OMAP_TRIP_STEP))
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/**
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* omap_thermal_is_valid_trip - check for trip index
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* @i: trip index
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*/
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#define omap_thermal_is_valid_trip(trip) \
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((trip) >= 0 && (trip) < OMAP_TRIP_NUMBER)
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#ifdef CONFIG_OMAP_THERMAL
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int omap_thermal_expose_sensor(struct omap_bandgap *bg_ptr, int id,
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char *domain);
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int omap_thermal_remove_sensor(struct omap_bandgap *bg_ptr, int id);
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int omap_thermal_register_cpu_cooling(struct omap_bandgap *bg_ptr, int id);
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int omap_thermal_unregister_cpu_cooling(struct omap_bandgap *bg_ptr, int id);
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#else
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static inline
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int omap_thermal_expose_sensor(struct omap_bandgap *bg_ptr, int id,
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char *domain)
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{
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return 0;
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}
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static inline
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int omap_thermal_remove_sensor(struct omap_bandgap *bg_ptr, int id)
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{
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return 0;
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}
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static inline
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int omap_thermal_register_cpu_cooling(struct omap_bandgap *bg_ptr, int id)
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{
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return 0;
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}
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static inline
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int omap_thermal_unregister_cpu_cooling(struct omap_bandgap *bg_ptr, int id)
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{
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return 0;
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}
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#endif
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#endif
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