2012-07-12 18:02:29 +02:00
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/*
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* OMAP4 Bandgap temperature sensor driver
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*
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* Copyright (C) 2011 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_BANDGAP_H
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#define __OMAP_BANDGAP_H
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#include <linux/mutex.h>
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#include <linux/types.h>
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#include <linux/err.h>
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/**
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* The register offsets and bit fields might change across
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* OMAP versions hence populating them in this structure.
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*/
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struct temp_sensor_registers {
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u32 temp_sensor_ctrl;
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u32 bgap_tempsoff_mask;
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u32 bgap_soc_mask;
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u32 bgap_eocz_mask;
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u32 bgap_dtemp_mask;
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u32 bgap_mask_ctrl;
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u32 mask_hot_mask;
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u32 mask_cold_mask;
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2013-02-26 23:53:29 +01:00
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u32 mask_sidlemode_mask;
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u32 mask_freeze_mask;
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u32 mask_clear_mask;
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u32 mask_clear_accum_mask;
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2012-07-12 18:02:29 +02:00
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u32 bgap_mode_ctrl;
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u32 mode_ctrl_mask;
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u32 bgap_counter;
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u32 counter_mask;
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u32 bgap_threshold;
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u32 threshold_thot_mask;
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u32 threshold_tcold_mask;
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u32 tshut_threshold;
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2013-02-26 23:53:29 +01:00
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u32 tshut_efuse_mask;
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u32 tshut_efuse_shift;
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2012-07-12 18:02:29 +02:00
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u32 tshut_hot_mask;
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u32 tshut_cold_mask;
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u32 bgap_status;
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u32 status_clean_stop_mask;
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u32 status_bgap_alert_mask;
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u32 status_hot_mask;
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u32 status_cold_mask;
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2013-02-26 23:53:29 +01:00
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u32 bgap_cumul_dtemp;
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u32 ctrl_dtemp_0;
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u32 ctrl_dtemp_1;
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u32 ctrl_dtemp_2;
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u32 ctrl_dtemp_3;
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u32 ctrl_dtemp_4;
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2012-07-12 18:02:29 +02:00
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u32 bgap_efuse;
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};
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/**
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* The thresholds and limits for temperature sensors.
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*/
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struct temp_sensor_data {
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u32 tshut_hot;
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u32 tshut_cold;
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u32 t_hot;
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u32 t_cold;
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u32 min_freq;
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u32 max_freq;
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int max_temp;
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int min_temp;
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int hyst_val;
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u32 adc_start_val;
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u32 adc_end_val;
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u32 update_int1;
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u32 update_int2;
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};
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struct omap_bandgap_data;
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/**
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* struct omap_bandgap - bandgap device structure
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* @dev: device pointer
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* @conf: platform data with sensor data
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* @fclock: pointer to functional clock of temperature sensor
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* @div_clk: pointer to parent clock of temperature sensor fclk
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* @conv_table: Pointer to adc to temperature conversion table
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* @bg_mutex: Mutex for sysfs, irq and PM
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* @irq: MPU Irq number for thermal alert
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* @tshut_gpio: GPIO where Tshut signal is routed
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* @clk_rate: Holds current clock rate
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*/
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struct omap_bandgap {
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struct device *dev;
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void __iomem *base;
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struct omap_bandgap_data *conf;
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struct clk *fclock;
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struct clk *div_clk;
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struct mutex bg_mutex; /* Mutex for irq and PM */
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int irq;
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int tshut_gpio;
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u32 clk_rate;
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};
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/**
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* struct temp_sensor_regval - temperature sensor register values
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* @bg_mode_ctrl: temp sensor control register value
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* @bg_ctrl: bandgap ctrl register value
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* @bg_counter: bandgap counter value
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* @bg_threshold: bandgap threshold register value
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* @tshut_threshold: bandgap tshut register value
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*/
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struct temp_sensor_regval {
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u32 bg_mode_ctrl;
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u32 bg_ctrl;
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u32 bg_counter;
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u32 bg_threshold;
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u32 tshut_threshold;
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};
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/**
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* struct omap_temp_sensor - bandgap temperature sensor platform data
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* @ts_data: pointer to struct with thresholds, limits of temperature sensor
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* @registers: pointer to the list of register offsets and bitfields
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* @regval: temperature sensor register values
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* @domain: the name of the domain where the sensor is located
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* @cooling_data: description on how the zone should be cooled off.
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* @slope: sensor gradient slope info for hotspot extrapolation
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* @const: sensor gradient const info for hotspot extrapolation
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* @slope_pcb: sensor gradient slope info for hotspot extrapolation
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* with no external influence
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* @const_pcb: sensor gradient const info for hotspot extrapolation
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* with no external influence
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* @data: private data
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* @register_cooling: function to describe how this sensor is going to be cooled
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* @unregister_cooling: function to release cooling data
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*/
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struct omap_temp_sensor {
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struct temp_sensor_data *ts_data;
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struct temp_sensor_registers *registers;
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struct temp_sensor_regval regval;
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char *domain;
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/* for hotspot extrapolation */
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const int slope;
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const int constant;
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const int slope_pcb;
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const int constant_pcb;
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void *data;
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int (*register_cooling)(struct omap_bandgap *bg_ptr, int id);
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int (*unregister_cooling)(struct omap_bandgap *bg_ptr, int id);
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};
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/**
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* struct omap_bandgap_data - bandgap platform data structure
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* @features: a bitwise flag set to describe the device features
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* @conv_table: Pointer to adc to temperature conversion table
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* @fclock_name: clock name of the functional clock
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* @div_ck_nme: clock name of the clock divisor
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* @sensor_count: count of temperature sensor device in scm
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* @sensors: array of sensors present in this bandgap instance
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* @expose_sensor: callback to export sensor to thermal API
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*/
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struct omap_bandgap_data {
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2013-03-15 13:59:49 +01:00
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#define OMAP_BANDGAP_FEATURE_TSHUT BIT(0)
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#define OMAP_BANDGAP_FEATURE_TSHUT_CONFIG BIT(1)
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#define OMAP_BANDGAP_FEATURE_TALERT BIT(2)
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#define OMAP_BANDGAP_FEATURE_MODE_CONFIG BIT(3)
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#define OMAP_BANDGAP_FEATURE_COUNTER BIT(4)
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#define OMAP_BANDGAP_FEATURE_POWER_SWITCH BIT(5)
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#define OMAP_BANDGAP_FEATURE_CLK_CTRL BIT(6)
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#define OMAP_BANDGAP_FEATURE_FREEZE_BIT BIT(7)
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2012-07-12 18:02:29 +02:00
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#define OMAP_BANDGAP_HAS(b, f) \
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((b)->conf->features & OMAP_BANDGAP_FEATURE_ ## f)
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unsigned int features;
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const int *conv_table;
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char *fclock_name;
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char *div_ck_name;
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int sensor_count;
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int (*report_temperature)(struct omap_bandgap *bg_ptr, int id);
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int (*expose_sensor)(struct omap_bandgap *bg_ptr, int id, char *domain);
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int (*remove_sensor)(struct omap_bandgap *bg_ptr, int id);
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/* this needs to be at the end */
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struct omap_temp_sensor sensors[];
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};
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int omap_bandgap_read_thot(struct omap_bandgap *bg_ptr, int id, int *thot);
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int omap_bandgap_write_thot(struct omap_bandgap *bg_ptr, int id, int val);
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int omap_bandgap_read_tcold(struct omap_bandgap *bg_ptr, int id, int *tcold);
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int omap_bandgap_write_tcold(struct omap_bandgap *bg_ptr, int id, int val);
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int omap_bandgap_read_update_interval(struct omap_bandgap *bg_ptr, int id,
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int *interval);
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int omap_bandgap_write_update_interval(struct omap_bandgap *bg_ptr, int id,
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u32 interval);
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int omap_bandgap_read_temperature(struct omap_bandgap *bg_ptr, int id,
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int *temperature);
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int omap_bandgap_set_sensor_data(struct omap_bandgap *bg_ptr, int id,
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void *data);
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void *omap_bandgap_get_sensor_data(struct omap_bandgap *bg_ptr, int id);
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2012-07-12 18:02:31 +02:00
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#ifdef CONFIG_OMAP4_THERMAL
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extern const struct omap_bandgap_data omap4430_data;
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extern const struct omap_bandgap_data omap4460_data;
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extern const struct omap_bandgap_data omap4470_data;
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#else
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#define omap4430_data NULL
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#define omap4460_data NULL
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#define omap4470_data NULL
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#endif
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2012-07-12 18:02:32 +02:00
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#ifdef CONFIG_OMAP5_THERMAL
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extern const struct omap_bandgap_data omap5430_data;
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#else
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#define omap5430_data NULL
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#endif
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2012-07-12 18:02:29 +02:00
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#endif
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