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Wysocki" , , , CC: , , "Jishnu Prakash" Subject: [PATCH V2 3/3] thermal: qcom: add support for PMIC5 Gen2 ADCTM Date: Tue, 26 Oct 2021 21:34:35 +0530 Message-ID: <1635264275-12530-4-git-send-email-quic_jprakash@quicinc.com> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1635264275-12530-1-git-send-email-quic_jprakash@quicinc.com> References: <1635264275-12530-1-git-send-email-quic_jprakash@quicinc.com> MIME-Version: 1.0 X-Originating-IP: [10.80.80.8] X-ClientProxiedBy: nasanex01a.na.qualcomm.com (10.52.223.231) To nalasex01a.na.qualcomm.com (10.47.209.196) Precedence: bulk List-ID: X-Mailing-List: linux-pm@vger.kernel.org Add support for PMIC5 Gen2 ADC_TM, used on PMIC7 chips. It is a close counterpart of PMIC7 ADC and has the same functionality as PMIC5 ADC_TM, for threshold monitoring and interrupt generation. It is present on PMK8350 alone, like PMIC7 ADC and can be used to monitor up to 8 ADC channels, from any of the PMIC7 PMICs having ADC on a target, through PBS(Programmable Boot Sequence). Signed-off-by: Jishnu Prakash --- drivers/thermal/qcom/qcom-spmi-adc-tm5.c | 418 +++++++++++++++++++++++++++++-- 1 file changed, 399 insertions(+), 19 deletions(-) diff --git a/drivers/thermal/qcom/qcom-spmi-adc-tm5.c b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c index 8494cc0..cdc4405 100644 --- a/drivers/thermal/qcom/qcom-spmi-adc-tm5.c +++ b/drivers/thermal/qcom/qcom-spmi-adc-tm5.c @@ -71,6 +71,60 @@ #define ADC_TM5_M_HIGH_THR_INT_EN BIT(1) #define ADC_TM5_M_LOW_THR_INT_EN BIT(0) +#define ADC_TM_GEN2_STATUS1 0x08 +#define ADC_TM_GEN2_STATUS_LOW_SET 0x09 +#define ADC_TM_GEN2_STATUS_LOW_CLR 0x0a +#define ADC_TM_GEN2_STATUS_HIGH_SET 0x0b +#define ADC_TM_GEN2_STATUS_HIGH_CLR 0x0c + +#define ADC_TM_GEN2_CFG_HS_SET 0x0d +#define ADC_TM_GEN2_CFG_HS_FLAG BIT(0) +#define ADC_TM_GEN2_CFG_HS_CLR 0x0e + +#define ADC_TM_GEN2_SID 0x40 + +#define ADC_TM_GEN2_CH_CTL 0x41 +#define ADC_TM_GEN2_TM_CH_SEL GENMASK(7, 5) +#define ADC_TM_GEN2_MEAS_INT_SEL GENMASK(3, 2) + +#define ADC_TM_GEN2_ADC_DIG_PARAM 0x42 +#define ADC_TM_GEN2_CTL_CAL_SEL GENMASK(5, 4) +#define ADC_TM_GEN2_CTL_DEC_RATIO_MASK GENMASK(3, 2) + +#define ADC_TM_GEN2_FAST_AVG_CTL 0x43 +#define ADC_TM_GEN2_FAST_AVG_EN BIT(7) + +#define ADC_TM_GEN2_ADC_CH_SEL_CTL 0x44 + +#define ADC_TM_GEN2_DELAY_CTL 0x45 +#define ADC_TM_GEN2_HW_SETTLE_DELAY GENMASK(3, 0) + +#define ADC_TM_GEN2_EN_CTL1 0x46 +#define ADC_TM_GEN2_EN BIT(7) + +#define ADC_TM_GEN2_CONV_REQ 0x47 +#define ADC_TM_GEN2_CONV_REQ_EN BIT(7) + +#define ADC_TM_GEN2_LOW_THR0 0x49 +#define ADC_TM_GEN2_LOW_THR1 0x4a +#define ADC_TM_GEN2_HIGH_THR0 0x4b +#define ADC_TM_GEN2_HIGH_THR1 0x4c +#define ADC_TM_GEN2_LOWER_MASK(n) ((n) & GENMASK(7, 0)) +#define ADC_TM_GEN2_UPPER_MASK(n) (((n) & GENMASK(15, 8)) >> 8) + +#define ADC_TM_GEN2_MEAS_IRQ_EN 0x4d +#define ADC_TM_GEN2_MEAS_EN BIT(7) +#define ADC_TM5_GEN2_HIGH_THR_INT_EN BIT(1) +#define ADC_TM5_GEN2_LOW_THR_INT_EN BIT(0) + +#define ADC_TM_GEN2_MEAS_INT_LSB 0x50 +#define ADC_TM_GEN2_MEAS_INT_MSB 0x51 +#define ADC_TM_GEN2_MEAS_INT_MODE 0x52 + +#define ADC_TM_GEN2_Mn_DATA0(n) ((n * 2) + 0xa0) +#define ADC_TM_GEN2_Mn_DATA1(n) ((n * 2) + 0xa1) +#define ADC_TM_GEN2_DATA_SHIFT 8 + enum adc5_timer_select { ADC5_TIMER_SEL_1 = 0, ADC5_TIMER_SEL_2, @@ -78,10 +132,10 @@ enum adc5_timer_select { ADC5_TIMER_SEL_NONE, }; -struct adc_tm5_data { - const u32 full_scale_code_volt; - unsigned int *decimation; - unsigned int *hw_settle; +enum adc5_gen { + ADC_TM5, + ADC_TM5_GEN2, + ADC_TM5_MAX }; enum adc_tm5_cal_method { @@ -91,6 +145,19 @@ enum adc_tm5_cal_method { }; struct adc_tm5_chip; +struct adc_tm5_channel; + +struct adc_tm5_data { + const u32 full_scale_code_volt; + unsigned int *decimation; + unsigned int *hw_settle; + int (*disable_channel)(struct adc_tm5_channel *channel); + int (*configure)(struct adc_tm5_channel *channel, int low, + int high); + irqreturn_t (*isr)(int irq, void *data); + char *irq_name; + int gen; +}; /** * struct adc_tm5_channel - ADC Thermal Monitoring channel data. @@ -100,6 +167,12 @@ struct adc_tm5_chip; * @prescale: channel scaling performed on the input signal. * @hw_settle_time: the time between AMUX being configured and the * start of conversion. + * @decimation: sampling rate supported for the channel. + * @avg_samples: ability to provide single result from the ADC + * that is an average of multiple measurements. + * @high_thr_en: channel upper voltage threshold enable state. + * @low_thr_en: channel lower voltage threshold enable state. + * @meas_en: recurring measurement enable state * @iio: IIO channel instance used by this channel. * @chip: ADC TM chip instance. * @tzd: thermal zone device used by this channel. @@ -110,6 +183,11 @@ struct adc_tm5_channel { enum adc_tm5_cal_method cal_method; unsigned int prescale; unsigned int hw_settle_time; + unsigned int decimation; /* For Gen2 ADC_TM */ + unsigned int avg_samples; /* For Gen2 ADC_TM */ + bool high_thr_en; /* For Gen2 ADC_TM */ + bool low_thr_en; /* For Gen2 ADC_TM */ + bool meas_en; /* For Gen2 ADC_TM */ struct iio_channel *iio; struct adc_tm5_chip *chip; struct thermal_zone_device *tzd; @@ -123,9 +201,12 @@ struct adc_tm5_channel { * @channels: array of ADC TM channel data. * @nchannels: amount of channels defined/allocated * @decimation: sampling rate supported for the channel. + * Applies to all channels, used only on Gen1 ADC_TM. * @avg_samples: ability to provide single result from the ADC - * that is an average of multiple measurements. + * that is an average of multiple measurements. Applies to all + * channels, used only on Gen1 ADC_TM. * @base: base address of TM registers. + * @adc_mutex_lock: ADC_TM mutex lock. */ struct adc_tm5_chip { struct regmap *regmap; @@ -136,14 +217,15 @@ struct adc_tm5_chip { unsigned int decimation; unsigned int avg_samples; u16 base; + struct mutex adc_mutex_lock; }; -static const struct adc_tm5_data adc_tm5_data_pmic = { - .full_scale_code_volt = 0x70e4, - .decimation = (unsigned int []) { 250, 420, 840 }, - .hw_settle = (unsigned int []) { 15, 100, 200, 300, 400, 500, 600, 700, - 1000, 2000, 4000, 8000, 16000, 32000, - 64000, 128000 }, +enum adc_tm_gen2_time_select { + MEAS_INT_50MS = 0, + MEAS_INT_100MS, + MEAS_INT_1S, + MEAS_INT_SET, + MEAS_INT_NONE, }; static int adc_tm5_read(struct adc_tm5_chip *adc_tm, u16 offset, u8 *data, int len) @@ -210,6 +292,61 @@ static irqreturn_t adc_tm5_isr(int irq, void *data) return IRQ_HANDLED; } +static irqreturn_t adc_tm5_gen2_isr(int irq, void *data) +{ + struct adc_tm5_chip *chip = data; + u8 status_low, status_high; + int ret, i; + + ret = adc_tm5_read(chip, ADC_TM_GEN2_STATUS_LOW_CLR, &status_low, sizeof(status_low)); + if (ret) { + dev_err(chip->dev, "read status_low failed: %d\n", ret); + return IRQ_HANDLED; + } + + ret = adc_tm5_read(chip, ADC_TM_GEN2_STATUS_HIGH_CLR, &status_high, sizeof(status_high)); + if (ret) { + dev_err(chip->dev, "read status_high failed: %d\n", ret); + return IRQ_HANDLED; + } + + ret = adc_tm5_write(chip, ADC_TM_GEN2_STATUS_LOW_CLR, &status_low, sizeof(status_low)); + if (ret < 0) { + dev_err(chip->dev, "clear status low failed with %d\n", ret); + return IRQ_HANDLED; + } + + ret = adc_tm5_write(chip, ADC_TM_GEN2_STATUS_HIGH_CLR, &status_high, sizeof(status_high)); + if (ret < 0) { + dev_err(chip->dev, "clear status high failed with %d\n", ret); + return IRQ_HANDLED; + } + + for (i = 0; i < chip->nchannels; i++) { + bool upper_set = false, lower_set = false; + unsigned int ch = chip->channels[i].channel; + + /* No TZD, we warned at the boot time */ + if (!chip->channels[i].tzd) + continue; + + if (!chip->channels[i].meas_en) + continue; + + lower_set = (status_low & BIT(ch)) && + (chip->channels[i].low_thr_en); + + upper_set = (status_high & BIT(ch)) && + (chip->channels[i].high_thr_en); + + if (upper_set || lower_set) + thermal_zone_device_update(chip->channels[i].tzd, + THERMAL_EVENT_UNSPECIFIED); + } + + return IRQ_HANDLED; +} + static int adc_tm5_get_temp(void *data, int *temp) { struct adc_tm5_channel *channel = data; @@ -240,6 +377,104 @@ static int adc_tm5_disable_channel(struct adc_tm5_channel *channel) 0); } +#define ADC_TM_GEN2_POLL_DELAY_MIN_US 100 +#define ADC_TM_GEN2_POLL_DELAY_MAX_US 110 +#define ADC_TM_GEN2_POLL_RETRY_COUNT 3 + +static int32_t adc_tm5_gen2_conv_req(struct adc_tm5_chip *chip) +{ + int ret = 0; + u8 data = 0; + unsigned int count; + + data = ADC_TM_GEN2_EN; + ret = adc_tm5_write(chip, ADC_TM_GEN2_EN_CTL1, &data, 1); + if (ret < 0) { + pr_err("adc-tm enable failed with %d\n", ret); + return ret; + } + + data = ADC_TM_GEN2_CFG_HS_FLAG; + ret = adc_tm5_write(chip, ADC_TM_GEN2_CFG_HS_SET, &data, 1); + if (ret < 0) { + pr_err("adc-tm handshake failed with %d\n", ret); + return ret; + } + + data = ADC_TM_GEN2_CONV_REQ_EN; + ret = adc_tm5_write(chip, ADC_TM_GEN2_CONV_REQ, &data, 1); + if (ret < 0) { + pr_err("adc-tm request conversion failed with %d\n", ret); + return ret; + } + + /* + * SW sets a handshake bit and waits for PBS to clear it + * before the next conversion request can be queued. + */ + + for (count = 0; count < ADC_TM_GEN2_POLL_RETRY_COUNT; count++) { + ret = adc_tm5_read(chip, ADC_TM_GEN2_CFG_HS_SET, &data, sizeof(data)); + if (ret < 0) { + pr_err("adc-tm read failed with %d\n", ret); + return ret; + } + + if (!(data & ADC_TM_GEN2_CFG_HS_FLAG)) + return ret; + usleep_range(ADC_TM_GEN2_POLL_DELAY_MIN_US, + ADC_TM_GEN2_POLL_DELAY_MAX_US); + } + + pr_err("adc-tm conversion request handshake timed out\n"); + + return -ETIMEDOUT; +} + +static int adc_tm5_gen2_disable_channel(struct adc_tm5_channel *channel) +{ + struct adc_tm5_chip *chip = channel->chip; + int ret; + u8 val; + + mutex_lock(&chip->adc_mutex_lock); + + channel->meas_en = false; + channel->high_thr_en = false; + channel->low_thr_en = false; + + ret = adc_tm5_read(chip, ADC_TM_GEN2_CH_CTL, &val, sizeof(val)); + if (ret < 0) { + pr_err("adc-tm block read failed with %d\n", ret); + goto disable_fail; + } + + val &= ~ADC_TM_GEN2_TM_CH_SEL; + val |= FIELD_PREP(ADC_TM_GEN2_TM_CH_SEL, channel->channel); + + ret = adc_tm5_write(chip, ADC_TM_GEN2_CH_CTL, &val, 1); + if (ret < 0) { + dev_err(chip->dev, "adc-tm channel disable failed with %d\n", ret); + goto disable_fail; + } + + val = 0; + ret = adc_tm5_write(chip, ADC_TM_GEN2_MEAS_IRQ_EN, &val, 1); + if (ret < 0) { + dev_err(chip->dev, "adc-tm interrupt disable failed with %d\n", ret); + goto disable_fail; + } + + + ret = adc_tm5_gen2_conv_req(channel->chip); + if (ret < 0) + dev_err(chip->dev, "adc-tm channel configure failed with %d\n", ret); + +disable_fail: + mutex_unlock(&chip->adc_mutex_lock); + return ret; +} + static int adc_tm5_enable(struct adc_tm5_chip *chip) { int ret; @@ -320,6 +555,86 @@ static int adc_tm5_configure(struct adc_tm5_channel *channel, int low, int high) return adc_tm5_enable(chip); } +static int adc_tm5_gen2_configure(struct adc_tm5_channel *channel, int low, int high) +{ + struct adc_tm5_chip *chip = channel->chip; + int ret; + u8 buf[14]; + u16 adc_code; + + mutex_lock(&chip->adc_mutex_lock); + + channel->meas_en = true; + + ret = adc_tm5_read(chip, ADC_TM_GEN2_SID, buf, sizeof(buf)); + if (ret < 0) { + pr_err("adc-tm block read failed with %d\n", ret); + goto config_fail; + } + + /* Set SID from virtual channel number */ + buf[0] = channel->adc_channel >> 8; + + /* Set TM channel number used and measurement interval */ + buf[1] &= ~ADC_TM_GEN2_TM_CH_SEL; + buf[1] |= FIELD_PREP(ADC_TM_GEN2_TM_CH_SEL, channel->channel); + buf[1] &= ~ADC_TM_GEN2_MEAS_INT_SEL; + buf[1] |= FIELD_PREP(ADC_TM_GEN2_MEAS_INT_SEL, MEAS_INT_1S); + + buf[2] &= ~ADC_TM_GEN2_CTL_DEC_RATIO_MASK; + buf[2] |= FIELD_PREP(ADC_TM_GEN2_CTL_DEC_RATIO_MASK, channel->decimation); + buf[2] &= ~ADC_TM_GEN2_CTL_CAL_SEL; + buf[2] |= FIELD_PREP(ADC_TM_GEN2_CTL_CAL_SEL, channel->cal_method); + + buf[3] = channel->avg_samples | ADC_TM_GEN2_FAST_AVG_EN; + + buf[4] = channel->adc_channel & 0xff; + + buf[5] = channel->hw_settle_time & ADC_TM_GEN2_HW_SETTLE_DELAY; + + /* High temperature corresponds to low voltage threshold */ + if (high != INT_MAX) { + channel->low_thr_en = true; + adc_code = qcom_adc_tm5_gen2_temp_res_scale(high); + + buf[9] = adc_code & 0xff; + buf[10] = adc_code >> 8; + } else { + channel->low_thr_en = false; + } + + /* Low temperature corresponds to high voltage threshold */ + if (low != -INT_MAX) { + channel->high_thr_en = true; + adc_code = qcom_adc_tm5_gen2_temp_res_scale(low); + + buf[11] = adc_code & 0xff; + buf[12] = adc_code >> 8; + } else { + channel->high_thr_en = false; + } + + buf[13] = ADC_TM_GEN2_MEAS_EN; + if (channel->high_thr_en) + buf[13] |= ADC_TM5_GEN2_HIGH_THR_INT_EN; + if (channel->low_thr_en) + buf[13] |= ADC_TM5_GEN2_LOW_THR_INT_EN; + + ret = adc_tm5_write(chip, ADC_TM_GEN2_SID, buf, sizeof(buf)); + if (ret) { + dev_err(chip->dev, "channel %d params write failed: %d\n", channel->channel, ret); + goto config_fail; + } + + ret = adc_tm5_gen2_conv_req(channel->chip); + if (ret < 0) + dev_err(chip->dev, "adc-tm channel configure failed with %d\n", ret); + +config_fail: + mutex_unlock(&chip->adc_mutex_lock); + return ret; +} + static int adc_tm5_set_trips(void *data, int low, int high) { struct adc_tm5_channel *channel = data; @@ -334,14 +649,14 @@ static int adc_tm5_set_trips(void *data, int low, int high) channel->channel, low, high); if (high == INT_MAX && low <= -INT_MAX) - ret = adc_tm5_disable_channel(channel); + ret = chip->data->disable_channel(channel); else - ret = adc_tm5_configure(channel, low, high); + ret = chip->data->configure(channel, low, high); return ret; } -static struct thermal_zone_of_device_ops adc_tm5_ops = { +static struct thermal_zone_of_device_ops adc_tm5_thermal_ops = { .get_temp = adc_tm5_get_temp, .set_trips = adc_tm5_set_trips, }; @@ -357,7 +672,7 @@ static int adc_tm5_register_tzd(struct adc_tm5_chip *adc_tm) tzd = devm_thermal_zone_of_sensor_register(adc_tm->dev, adc_tm->channels[i].channel, &adc_tm->channels[i], - &adc_tm5_ops); + &adc_tm5_thermal_ops); if (IS_ERR(tzd)) { if (PTR_ERR(tzd) == -ENODEV) { dev_warn(adc_tm->dev, "thermal sensor on channel %d is not used\n", @@ -395,6 +710,11 @@ static int adc_tm5_init(struct adc_tm5_chip *chip) } } + if (chip-->data->gen == ADC_TM5_GEN2) { + mutex_init(&chip->adc_mutex_lock); + return ret; + } + buf[0] = chip->decimation; buf[1] = chip->avg_samples | ADC_TM5_FAST_AVG_EN; buf[2] = ADC_TM5_TIMER1; @@ -415,7 +735,7 @@ static int adc_tm5_get_dt_channel_data(struct adc_tm5_chip *adc_tm, struct device_node *node) { const char *name = node->name; - u32 chan, value, varr[2]; + u32 chan, value, adc_channel, varr[2]; int ret; struct device *dev = adc_tm->dev; struct of_phandle_args args; @@ -445,7 +765,11 @@ static int adc_tm5_get_dt_channel_data(struct adc_tm5_chip *adc_tm, } of_node_put(args.np); - if (args.args_count != 1 || args.args[0] >= ADC5_MAX_CHANNEL) { + adc_channel = args.args[0]; + if (adc_tm->data->gen == ADC_TM5_GEN2) + adc_channel &= 0xff; + + if (args.args_count != 1 || adc_channel >= ADC5_MAX_CHANNEL) { dev_err(dev, "%s: invalid ADC channel number %d\n", name, chan); return -EINVAL; } @@ -491,9 +815,61 @@ static int adc_tm5_get_dt_channel_data(struct adc_tm5_chip *adc_tm, else channel->cal_method = ADC_TM5_ABSOLUTE_CAL; + if (adc_tm->data->gen == ADC_TM5_GEN2) { + ret = of_property_read_u32(node, "qcom,decimation", &value); + if (!ret) { + ret = qcom_adc5_decimation_from_dt(value, adc_tm->data->decimation); + if (ret < 0) { + dev_err(dev, "invalid decimation %d\n", value); + return ret; + } + channel->decimation = ret; + } else { + channel->decimation = ADC5_DECIMATION_DEFAULT; + } + + ret = of_property_read_u32(node, "qcom,avg-samples", &value); + if (!ret) { + ret = qcom_adc5_avg_samples_from_dt(value); + if (ret < 0) { + dev_err(dev, "invalid avg-samples %d\n", value); + return ret; + } + channel->avg_samples = ret; + } else { + channel->avg_samples = VADC_DEF_AVG_SAMPLES; + } + } + return 0; } +static const struct adc_tm5_data adc_tm5_data_pmic = { + .full_scale_code_volt = 0x70e4, + .decimation = (unsigned int []) { 250, 420, 840 }, + .hw_settle = (unsigned int []) { 15, 100, 200, 300, 400, 500, 600, 700, + 1000, 2000, 4000, 8000, 16000, 32000, + 64000, 128000 }, + .disable_channel = adc_tm5_disable_channel, + .configure = adc_tm5_configure, + .isr = adc_tm5_isr, + .irq_name = "pm-adc-tm5", + .gen = ADC_TM5, +}; + +static const struct adc_tm5_data adc_tm5_gen2_data_pmic = { + .full_scale_code_volt = 0x70e4, + .decimation = (unsigned int []) { 85, 340, 1360 }, + .hw_settle = (unsigned int []) { 15, 100, 200, 300, 400, 500, 600, 700, + 1000, 2000, 4000, 8000, 16000, 32000, + 64000, 128000 }, + .disable_channel = adc_tm5_gen2_disable_channel, + .configure = adc_tm5_gen2_configure, + .isr = adc_tm5_gen2_isr, + .irq_name = "pm-adc-tm5-gen2", + .gen = ADC_TM5_GEN2, +}; + static int adc_tm5_get_dt_data(struct adc_tm5_chip *adc_tm, struct device_node *node) { struct adc_tm5_channel *channels; @@ -603,8 +979,8 @@ static int adc_tm5_probe(struct platform_device *pdev) return ret; } - return devm_request_threaded_irq(dev, irq, NULL, adc_tm5_isr, - IRQF_ONESHOT, "pm-adc-tm5", adc_tm); + return devm_request_threaded_irq(dev, irq, NULL, adc_tm->data->isr, + IRQF_ONESHOT, adc_tm->data->irq_name, adc_tm); } static const struct of_device_id adc_tm5_match_table[] = { @@ -612,6 +988,10 @@ static const struct of_device_id adc_tm5_match_table[] = { .compatible = "qcom,spmi-adc-tm5", .data = &adc_tm5_data_pmic, }, + { + .compatible = "qcom,spmi-adc-tm5-gen2", + .data = &adc_tm5_gen2_data_pmic, + }, { } }; MODULE_DEVICE_TABLE(of, adc_tm5_match_table);