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Wysocki" , Amit Kucheria , Thara Gopinath , Andy Gross , Bjorn Andersson CC: David Collins , Konrad Dybcio , Zhang Rui , , , Subject: [RESEND PATCH v3 2/3] thermal: qcom-spmi-temp-alarm: add support for GEN2 rev 2 PMIC peripherals Date: Tue, 24 Jan 2023 15:46:05 -0800 Message-ID: <4e444485df707277b7943d715ca355cc36ea536d.1674602698.git.quic_collinsd@quicinc.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: References: MIME-Version: 1.0 X-Originating-IP: [10.49.16.6] X-ClientProxiedBy: nalasex01a.na.qualcomm.com (10.47.209.196) To nasanex01b.na.qualcomm.com (10.46.141.250) Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add support for TEMP_ALARM GEN2 PMIC peripherals with digital major revision 2. This revision utilizes individual registers to set the threshold temperature for over-temperature stages 1, 2, and 3 instead of a single register to specify a set of thresholds. Signed-off-by: David Collins --- drivers/thermal/qcom/qcom-spmi-temp-alarm.c | 162 +++++++++++++++++++- 1 file changed, 156 insertions(+), 6 deletions(-) diff --git a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c b/drivers/thermal/qcom/qcom-spmi-temp-alarm.c index e2e52703ac4d..1fe8ff7a274e 100644 --- a/drivers/thermal/qcom/qcom-spmi-temp-alarm.c +++ b/drivers/thermal/qcom/qcom-spmi-temp-alarm.c @@ -26,6 +26,10 @@ #define QPNP_TM_REG_STATUS 0x08 #define QPNP_TM_REG_SHUTDOWN_CTRL1 0x40 #define QPNP_TM_REG_ALARM_CTRL 0x46 +/* TEMP_DAC_* 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 @@ -67,6 +71,25 @@ 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 @@ -87,6 +110,9 @@ struct qpnp_tm_chip { struct iio_channel *adc; const long (*temp_map)[THRESH_COUNT][STAGE_COUNT]; + + bool has_temp_dac; + long temp_dac_map[STAGE_COUNT]; }; /* This array maps from GEN2 alarm state to GEN1 alarm stage */ @@ -120,6 +146,13 @@ static int qpnp_tm_write(struct qpnp_tm_chip *chip, u16 addr, u8 data) */ static long qpnp_tm_decode_temp(struct qpnp_tm_chip *chip, unsigned int stage) { + if (chip->has_temp_dac) { + if (stage == 0 || stage > STAGE_COUNT) + return 0; + + return chip->temp_dac_map[stage - 1]; + } + if (!chip->temp_map || chip->thresh >= THRESH_COUNT || stage == 0 || stage > STAGE_COUNT) return 0; @@ -221,6 +254,34 @@ static int qpnp_tm_get_temp(struct thermal_zone_device *tz, int *temp) return 0; } +static int qpnp_tm_set_temp_dac_thresh(struct qpnp_tm_chip *chip, int trip, + int temp) +{ + int ret, temp_cfg; + u8 reg; + + if (trip < 0 || 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_dac_map[trip] = temp_cfg; + + return 0; +} + static int qpnp_tm_update_critical_trip_temp(struct qpnp_tm_chip *chip, int temp) { @@ -309,6 +370,24 @@ static const struct thermal_zone_device_ops qpnp_tm_sensor_ops = { .set_trip_temp = qpnp_tm_set_trip_temp, }; +static int qpnp_tm_set_temp_dac_trip_temp(struct thermal_zone_device *tz, + int trip, int temp) +{ + struct qpnp_tm_chip *chip = tz->devdata; + int ret; + + mutex_lock(&chip->lock); + ret = qpnp_tm_set_temp_dac_thresh(chip, trip, temp); + mutex_unlock(&chip->lock); + + return ret; +} + +static const struct thermal_zone_device_ops qpnp_tm_sensor_temp_dac_ops = { + .get_temp = qpnp_tm_get_temp, + .set_trip_temp = qpnp_tm_set_temp_dac_trip_temp, +}; + static irqreturn_t qpnp_tm_isr(int irq, void *data) { struct qpnp_tm_chip *chip = data; @@ -341,6 +420,60 @@ static int qpnp_tm_get_critical_trip_temp(struct qpnp_tm_chip *chip) return THERMAL_TEMP_INVALID; } +/* Configure TEMP_DAC registers based on DT thermal_zone trips */ +static int qpnp_tm_temp_dac_update_trip_temps(struct qpnp_tm_chip *chip) +{ + const struct thermal_trip *trips; + int ret, ntrips, i; + + ntrips = of_thermal_get_ntrips(chip->tz_dev); + /* Keep hardware defaults if no DT trips are defined. */ + if (ntrips <= 0) + return 0; + + trips = of_thermal_get_trip_points(chip->tz_dev); + if (!trips) + return -EINVAL; + + for (i = 0; i < ntrips; i++) { + if (of_thermal_is_trip_valid(chip->tz_dev, i)) { + ret = qpnp_tm_set_temp_dac_thresh(chip, i, + trips[i].temperature); + if (ret < 0) + return ret; + } + } + + /* Verify that trips are strictly increasing. */ + for (i = 1; i < STAGE_COUNT; i++) { + if (chip->temp_dac_map[i] <= chip->temp_dac_map[i - 1]) { + dev_err(chip->dev, "Threshold %d=%ld <= threshold %d=%ld\n", + i, chip->temp_dac_map[i], i - 1, + chip->temp_dac_map[i - 1]); + return -EINVAL; + } + } + + return 0; +} + +/* Read the hardware default TEMP_DAC stage threshold temperatures */ +static int qpnp_tm_temp_dac_init(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, ®); + if (ret < 0) + return ret; + + chip->temp_dac_map[i] = TEMP_DAC_REG_TO_TEMP(reg); + } + + return 0; +} + /* * This function initializes the internal temp value based on only the * current thermal stage and threshold. Setup threshold control and @@ -373,10 +506,16 @@ static int qpnp_tm_init(struct qpnp_tm_chip *chip) if (stage) chip->temp = qpnp_tm_decode_temp(chip, stage); - crit_temp = qpnp_tm_get_critical_trip_temp(chip); - ret = qpnp_tm_update_critical_trip_temp(chip, crit_temp); - if (ret < 0) - goto out; + if (chip->has_temp_dac) { + ret = qpnp_tm_temp_dac_update_trip_temps(chip); + if (ret < 0) + goto out; + } else { + crit_temp = qpnp_tm_get_critical_trip_temp(chip); + ret = qpnp_tm_update_critical_trip_temp(chip, crit_temp); + if (ret < 0) + goto out; + } /* Enable the thermal alarm PMIC module in always-on mode. */ reg = ALARM_CTRL_FORCE_ENABLE; @@ -393,6 +532,7 @@ static int qpnp_tm_probe(struct platform_device *pdev) { struct qpnp_tm_chip *chip; struct device_node *node; + const struct thermal_zone_device_ops *ops; u8 type, subtype, dig_major, dig_minor; u32 res; int ret, irq; @@ -464,19 +604,29 @@ static int qpnp_tm_probe(struct platform_device *pdev) return -ENODEV; } + ops = &qpnp_tm_sensor_ops; chip->subtype = subtype; - if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major >= 1) + if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major >= 2) + chip->has_temp_dac = true; + else if (subtype == QPNP_TM_SUBTYPE_GEN2 && dig_major >= 1) chip->temp_map = &temp_map_gen2_v1; else chip->temp_map = &temp_map_gen1; + if (chip->has_temp_dac) { + ops = &qpnp_tm_sensor_temp_dac_ops; + ret = qpnp_tm_temp_dac_init(chip); + if (ret < 0) + return ret; + } + /* * Register the sensor before initializing the hardware to be able to * read the trip points. get_temp() returns the default temperature * before the hardware initialization is completed. */ chip->tz_dev = devm_thermal_of_zone_register( - &pdev->dev, 0, chip, &qpnp_tm_sensor_ops); + &pdev->dev, 0, chip, ops); if (IS_ERR(chip->tz_dev)) { dev_err(&pdev->dev, "failed to register sensor\n"); return PTR_ERR(chip->tz_dev);