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thermal/drivers/qcom-spmi-temp-alarm: Add support for GEN2 rev 2 PMIC peripherals

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Add support for TEMP_ALARM GEN2 PMIC peripherals with digital major
revision 2.  This revision utilizes individual temp DAC registers
to set the threshold temperature for over-temperature stages 1 (warning),
2 (system shutdown), and 3 (emergency shutdown) instead of a single
register to specify a set of thresholds.

Co-developed-by: David Collins <david.collins@oss.qualcomm.com>
Signed-off-by: David Collins <david.collins@oss.qualcomm.com>
Signed-off-by: Anjelique Melendez <anjelique.melendez@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250710224555.3047790-5-anjelique.melendez@oss.qualcomm.com
Signed-off-by: Daniel Lezcano <daniel.lezcano@linaro.org>
This commit is contained in:
Anjelique Melendez 2025-07-10 15:45:54 -07:00 • committed by Daniel Lezcano
parent 1f835c6a4c
commit 348e104715
1 changed files with 137 additions and 1 deletions
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138
drivers/thermal/qcom/qcom-spmi-temp-alarm.c
View file

@ -26,6 +26,11 @@
#define QPNP_TM_REG_SHUTDOWN_CTRL1 0x40
#define QPNP_TM_REG_ALARM_CTRL 0x46
/* TEMP_DAC_STGx registers are only present for TEMP_GEN2 v2.0 */
#define QPNP_TM_REG_TEMP_DAC_STG1 0x47
#define QPNP_TM_REG_TEMP_DAC_STG2 0x48
#define QPNP_TM_REG_TEMP_DAC_STG3 0x49
#define QPNP_TM_TYPE 0x09
#define QPNP_TM_SUBTYPE_GEN1 0x08
#define QPNP_TM_SUBTYPE_GEN2 0x09
@ -71,6 +76,25 @@ static const long temp_map_gen2_v1[THRESH_COUNT][STAGE_COUNT] = {
#define TEMP_STAGE_HYSTERESIS 2000
/*
* For TEMP_GEN2 v2.0, TEMP_DAC_STG1/2/3 registers are used to set the threshold
* for each stage independently.
* TEMP_DAC_STG* = 0 --> 80 C
* Each 8 step increase in TEMP_DAC_STG* value corresponds to 5 C (5000 mC).
*/
#define TEMP_DAC_MIN 80000
#define TEMP_DAC_SCALE_NUM 8
#define TEMP_DAC_SCALE_DEN 5000
#define TEMP_DAC_TEMP_TO_REG(temp) \
(((temp) - TEMP_DAC_MIN) * TEMP_DAC_SCALE_NUM / TEMP_DAC_SCALE_DEN)
#define TEMP_DAC_REG_TO_TEMP(reg) \
(TEMP_DAC_MIN + (reg) * TEMP_DAC_SCALE_DEN / TEMP_DAC_SCALE_NUM)
static const long temp_dac_max[STAGE_COUNT] = {
119375, 159375, 159375
};
/* Temperature in Milli Celsius reported during stage 0 if no ADC is present */
#define DEFAULT_TEMP 37000
@ -93,6 +117,7 @@ struct qpnp_tm_chip {
long temp;
unsigned int stage;
unsigned int base;
unsigned int ntrips;
/* protects .thresh, .stage and chip registers */
struct mutex lock;
bool initialized;
@ -310,6 +335,54 @@ static const struct thermal_zone_device_ops qpnp_tm_sensor_ops = {
.set_trip_temp = qpnp_tm_set_trip_temp,
};
static int qpnp_tm_gen2_rev2_set_temp_thresh(struct qpnp_tm_chip *chip, unsigned int trip, int temp)
{
int ret, temp_cfg;
u8 reg;
WARN_ON(!mutex_is_locked(&chip->lock));
if (trip >= STAGE_COUNT) {
dev_err(chip->dev, "invalid TEMP_DAC trip = %d\n", trip);
return -EINVAL;
} else if (temp < TEMP_DAC_MIN || temp > temp_dac_max[trip]) {
dev_err(chip->dev, "invalid TEMP_DAC temp = %d\n", temp);
return -EINVAL;
}
reg = TEMP_DAC_TEMP_TO_REG(temp);
temp_cfg = TEMP_DAC_REG_TO_TEMP(reg);
ret = qpnp_tm_write(chip, QPNP_TM_REG_TEMP_DAC_STG1 + trip, reg);
if (ret < 0) {
dev_err(chip->dev, "TEMP_DAC_STG write failed, ret=%d\n", ret);
return ret;
}
chip->temp_thresh_map[trip] = temp_cfg;
return 0;
}
static int qpnp_tm_gen2_rev2_set_trip_temp(struct thermal_zone_device *tz,
const struct thermal_trip *trip, int temp)
{
unsigned int trip_index = THERMAL_TRIP_PRIV_TO_INT(trip->priv);
struct qpnp_tm_chip *chip = thermal_zone_device_priv(tz);
int ret;
mutex_lock(&chip->lock);
ret = qpnp_tm_gen2_rev2_set_temp_thresh(chip, trip_index, temp);
mutex_unlock(&chip->lock);
return ret;
}
static const struct thermal_zone_device_ops qpnp_tm_gen2_rev2_sensor_ops = {
.get_temp = qpnp_tm_get_temp,
.set_trip_temp = qpnp_tm_gen2_rev2_set_trip_temp,
};
static irqreturn_t qpnp_tm_isr(int irq, void *data)
{
struct qpnp_tm_chip *chip = data;
@ -351,6 +424,60 @@ static int qpnp_tm_configure_trip_temp(struct qpnp_tm_chip *chip)
return ret;
}
/* Configure TEMP_DAC registers based on DT thermal_zone trips */
static int qpnp_tm_gen2_rev2_configure_trip_temps_cb(struct thermal_trip *trip, void *data)
{
struct qpnp_tm_chip *chip = data;
int ret;
mutex_lock(&chip->lock);
trip->priv = THERMAL_INT_TO_TRIP_PRIV(chip->ntrips);
ret = qpnp_tm_gen2_rev2_set_temp_thresh(chip, chip->ntrips, trip->temperature);
chip->ntrips++;
mutex_unlock(&chip->lock);
return ret;
}
static int qpnp_tm_gen2_rev2_configure_trip_temps(struct qpnp_tm_chip *chip)
{
int ret, i;
ret = thermal_zone_for_each_trip(chip->tz_dev,
qpnp_tm_gen2_rev2_configure_trip_temps_cb, chip);
if (ret < 0)
return ret;
/* Verify that trips are strictly increasing. */
for (i = 1; i < STAGE_COUNT; i++) {
if (chip->temp_thresh_map[i] <= chip->temp_thresh_map[i - 1]) {
dev_err(chip->dev, "Threshold %d=%ld <= threshold %d=%ld\n",
i, chip->temp_thresh_map[i], i - 1,
chip->temp_thresh_map[i - 1]);
return -EINVAL;
}
}
return 0;
}
/* Read the hardware default TEMP_DAC stage threshold temperatures */
static int qpnp_tm_gen2_rev2_sync_thresholds(struct qpnp_tm_chip *chip)
{
int ret, i;
u8 reg = 0;
for (i = 0; i < STAGE_COUNT; i++) {
ret = qpnp_tm_read(chip, QPNP_TM_REG_TEMP_DAC_STG1 + i, &reg);
if (ret < 0)
return ret;
chip->temp_thresh_map[i] = TEMP_DAC_REG_TO_TEMP(reg);
}
return 0;
}
static const struct spmi_temp_alarm_data spmi_temp_alarm_data = {
.ops = &qpnp_tm_sensor_ops,
.temp_map = &temp_map_gen1,
@ -375,6 +502,13 @@ static const struct spmi_temp_alarm_data spmi_temp_alarm_gen2_rev1_data = {
.get_temp_stage = qpnp_tm_gen2_get_temp_stage,
};
static const struct spmi_temp_alarm_data spmi_temp_alarm_gen2_rev2_data = {
.ops = &qpnp_tm_gen2_rev2_sensor_ops,
.sync_thresholds = qpnp_tm_gen2_rev2_sync_thresholds,
.configure_trip_temps = qpnp_tm_gen2_rev2_configure_trip_temps,
.get_temp_stage = qpnp_tm_gen2_get_temp_stage,
};
/*
* This function initializes the internal temp value based on only the
* current thermal stage and threshold.
@ -491,8 +625,10 @@ static int qpnp_tm_probe(struct platform_device *pdev)
chip->data = &spmi_temp_alarm_data;
else if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major == 0)
chip->data = &spmi_temp_alarm_gen2_data;
else if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major >= 1)
else if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major == 1)
chip->data = &spmi_temp_alarm_gen2_rev1_data;
else if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major >= 2)
chip->data = &spmi_temp_alarm_gen2_rev2_data;
else
return -ENODEV;