linux-imx

/*

 * OMAP4 thermal driver.

 *

 * Copyright (C) 2011-2012 Texas Instruments Inc.

 * Contact:

 *  Eduardo Valentin <eduardo.valentin@ti.com>

 *

 * 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.

 *

 */

​

#include "ti-thermal.h"

#include "ti-bandgap.h"

#include "omap4xxx-bandgap.h"

​

/*

 * OMAP4430 has one instance of thermal sensor for MPU

 * need to describe the individual bit fields

 */

static struct temp_sensor_registers

omap4430_mpu_temp_sensor_registers = {

    .temp_sensor_ctrl = OMAP4430_TEMP_SENSOR_CTRL_OFFSET,

    .bgap_tempsoff_mask = OMAP4430_BGAP_TEMPSOFF_MASK,

    .bgap_soc_mask = OMAP4430_BGAP_TEMP_SENSOR_SOC_MASK,

    .bgap_eocz_mask = OMAP4430_BGAP_TEMP_SENSOR_EOCZ_MASK,

    .bgap_dtemp_mask = OMAP4430_BGAP_TEMP_SENSOR_DTEMP_MASK,

​

    .bgap_mode_ctrl = OMAP4430_TEMP_SENSOR_CTRL_OFFSET,

    .mode_ctrl_mask = OMAP4430_SINGLE_MODE_MASK,

​

    .bgap_efuse = OMAP4430_FUSE_OPP_BGAP,

};

​

/* Thresholds and limits for OMAP4430 MPU temperature sensor */

static struct temp_sensor_data omap4430_mpu_temp_sensor_data = {

    .min_freq = OMAP4430_MIN_FREQ,

    .max_freq = OMAP4430_MAX_FREQ,

};

​

/*

 * Temperature values in milli degree celsius

 * ADC code values from 530 to 923

 */

static const int

omap4430_adc_to_temp[OMAP4430_ADC_END_VALUE - OMAP4430_ADC_START_VALUE + 1] = {

    -38000, -35000, -34000, -32000, -30000, -28000, -26000, -24000, -22000,

    -20000, -18000, -17000, -15000, -13000, -12000, -10000, -8000, -6000,

    -5000, -3000, -1000, 0, 2000, 3000, 5000, 6000, 8000, 10000, 12000,

    13000, 15000, 17000, 19000, 21000, 23000, 25000, 27000, 28000, 30000,

    32000, 33000, 35000, 37000, 38000, 40000, 42000, 43000, 45000, 47000,

    48000, 50000, 52000, 53000, 55000, 57000, 58000, 60000, 62000, 64000,

    66000, 68000, 70000, 71000, 73000, 75000, 77000, 78000, 80000, 82000,

    83000, 85000, 87000, 88000, 90000, 92000, 93000, 95000, 97000, 98000,

    100000, 102000, 103000, 105000, 107000, 109000, 111000, 113000, 115000,

    117000, 118000, 120000, 122000, 123000,

};

​

/* OMAP4430 data */

const struct ti_bandgap_data omap4430_data = {

    .features = TI_BANDGAP_FEATURE_MODE_CONFIG |

            TI_BANDGAP_FEATURE_CLK_CTRL |

            TI_BANDGAP_FEATURE_POWER_SWITCH,

    .fclock_name = "bandgap_fclk",

    .div_ck_name = "bandgap_fclk",

    .conv_table = omap4430_adc_to_temp,

    .adc_start_val = OMAP4430_ADC_START_VALUE,

    .adc_end_val = OMAP4430_ADC_END_VALUE,

    .expose_sensor = ti_thermal_expose_sensor,

    .remove_sensor = ti_thermal_remove_sensor,

    .sensors = {

        {

        .registers = &omap4430_mpu_temp_sensor_registers,

        .ts_data = &omap4430_mpu_temp_sensor_data,

        .domain = "cpu",

        .slope_pcb = OMAP_GRADIENT_SLOPE_W_PCB_4430,

        .constant_pcb = OMAP_GRADIENT_CONST_W_PCB_4430,

        .register_cooling = ti_thermal_register_cpu_cooling,

        .unregister_cooling = ti_thermal_unregister_cpu_cooling,

        },

    },

    .sensor_count = 1,

};

/*

 * OMAP4460 has one instance of thermal sensor for MPU

 * need to describe the individual bit fields