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// SPDX-License-Identifier: GPL-2.0
/*
* Copyright (c) 2015, The Linux Foundation. All rights reserved.
* Copyright (c) 2018, Linaro Limited
*/
#include <linux/bitops.h>
#include <linux/regmap.h>
#include "tsens.h"
/* ----- SROT ------ */
#define SROT_HW_VER_OFF 0x0000
#define SROT_CTRL_OFF 0x0004
/* ----- TM ------ */
#define TM_INT_EN_OFF 0x0004
#define TM_UPPER_LOWER_INT_STATUS_OFF 0x0008
#define TM_UPPER_LOWER_INT_CLEAR_OFF 0x000c
#define TM_UPPER_LOWER_INT_MASK_OFF 0x0010
#define TM_CRITICAL_INT_STATUS_OFF 0x0014
#define TM_CRITICAL_INT_CLEAR_OFF 0x0018
#define TM_CRITICAL_INT_MASK_OFF 0x001c
#define TM_Sn_UPPER_LOWER_THRESHOLD_OFF 0x0020
#define TM_Sn_CRITICAL_THRESHOLD_OFF 0x0060
#define TM_Sn_STATUS_OFF 0x00a0
#define TM_TRDY_OFF 0x00e4
#define LAST_TEMP_MASK 0xfff
static int get_temp_tsens_v2(struct tsens_priv *priv, int id, int *temp)
{
struct tsens_sensor *s = &priv->sensor[id];
u32 temp_idx = LAST_TEMP_0 + s->hw_id;
u32 valid_idx = VALID_0 + s->hw_id;
u32 last_temp = 0, last_temp2 = 0, last_temp3 = 0, valid;
int ret;
ret = regmap_field_read(priv->rf[temp_idx], &last_temp);
if (ret)
return ret;
ret = regmap_field_read(priv->rf[valid_idx], &valid);
if (ret)
return ret;
if (valid)
goto done;
/* Try a second time */
ret = regmap_field_read(priv->rf[valid_idx], &valid);
if (ret)
return ret;
ret = regmap_field_read(priv->rf[temp_idx], &last_temp2);
if (ret)
return ret;
if (valid) {
last_temp = last_temp2;
goto done;
}
/* Try a third/last time */
ret = regmap_field_read(priv->rf[valid_idx], &valid);
if (ret)
return ret;
ret = regmap_field_read(priv->rf[temp_idx], &last_temp3);
if (ret)
return ret;
if (valid) {
last_temp = last_temp3;
goto done;
}
if (last_temp == last_temp2)
last_temp = last_temp2;
else if (last_temp2 == last_temp3)
last_temp = last_temp3;
done:
/* Convert temperature from deciCelsius to milliCelsius */
*temp = sign_extend32(last_temp, fls(LAST_TEMP_MASK) - 1) * 100;
return 0;
}
/* v2.x: 8996, 8998, sdm845 */
static const struct tsens_features tsens_v2_feat = {
.ver_major = VER_2_X,
.crit_int = 1,
.adc = 0,
.srot_split = 1,
.max_sensors = 16,
};
static const struct reg_field tsens_v2_regfields[MAX_REGFIELDS] = {
/* ----- SROT ------ */
/* VERSION */
[VER_MAJOR] = REG_FIELD(SROT_HW_VER_OFF, 28, 31),
[VER_MINOR] = REG_FIELD(SROT_HW_VER_OFF, 16, 27),
[VER_STEP] = REG_FIELD(SROT_HW_VER_OFF, 0, 15),
/* CTRL_OFF */
[TSENS_EN] = REG_FIELD(SROT_CTRL_OFF, 0, 0),
[TSENS_SW_RST] = REG_FIELD(SROT_CTRL_OFF, 1, 1),
[SENSOR_EN] = REG_FIELD(SROT_CTRL_OFF, 3, 18),
/* ----- TM ------ */
/* INTERRUPT ENABLE */
/* v2 has separate enables for UPPER/LOWER/CRITICAL interrupts */
[INT_EN] = REG_FIELD(TM_INT_EN_OFF, 0, 2),
/* Sn_STATUS */
REG_FIELD_FOR_EACH_SENSOR16(LAST_TEMP, TM_Sn_STATUS_OFF, 0, 11),
REG_FIELD_FOR_EACH_SENSOR16(VALID, TM_Sn_STATUS_OFF, 21, 21),
REG_FIELD_FOR_EACH_SENSOR16(MIN_STATUS, TM_Sn_STATUS_OFF, 16, 16),
REG_FIELD_FOR_EACH_SENSOR16(LOWER_STATUS, TM_Sn_STATUS_OFF, 17, 17),
REG_FIELD_FOR_EACH_SENSOR16(UPPER_STATUS, TM_Sn_STATUS_OFF, 18, 18),
REG_FIELD_FOR_EACH_SENSOR16(CRITICAL_STATUS, TM_Sn_STATUS_OFF, 19, 19),
REG_FIELD_FOR_EACH_SENSOR16(MAX_STATUS, TM_Sn_STATUS_OFF, 20, 20),
/* TRDY: 1=ready, 0=in progress */
[TRDY] = REG_FIELD(TM_TRDY_OFF, 0, 0),
};
static const struct tsens_ops ops_generic_v2 = {
.init = init_common,
.get_temp = get_temp_tsens_v2,
};
const struct tsens_plat_data data_tsens_v2 = {
.ops = &ops_generic_v2,
.feat = &tsens_v2_feat,
.fields = tsens_v2_regfields,
};
/* Kept around for backward compatibility with old msm8996.dtsi */
const struct tsens_plat_data data_8996 = {
.num_sensors = 13,
.ops = &ops_generic_v2,
.feat = &tsens_v2_feat,
.fields = tsens_v2_regfields,
};
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