diff options
Diffstat (limited to 'drivers/iio')
| -rw-r--r-- | drivers/iio/adc/qcom-rradc.c | 89 | ||||
| -rw-r--r-- | drivers/iio/adc/qcom-tadc.c | 244 |
2 files changed, 294 insertions, 39 deletions
diff --git a/drivers/iio/adc/qcom-rradc.c b/drivers/iio/adc/qcom-rradc.c index 57145ea72e90..202fee4711c1 100644 --- a/drivers/iio/adc/qcom-rradc.c +++ b/drivers/iio/adc/qcom-rradc.c @@ -38,6 +38,7 @@ #define FG_ADC_RR_FAKE_BATT_HIGH_MSB 0x5B #define FG_ADC_RR_BATT_ID_CTRL 0x60 +#define FG_ADC_RR_BATT_ID_CTRL_CHANNEL_CONV BIT(0) #define FG_ADC_RR_BATT_ID_TRIGGER 0x61 #define FG_ADC_RR_BATT_ID_TRIGGER_CTL BIT(0) #define FG_ADC_RR_BATT_ID_STS 0x62 @@ -753,6 +754,75 @@ static int rradc_read_channel_with_continuous_mode(struct rradc_chip *chip, return rc; } +static int rradc_enable_batt_id_channel(struct rradc_chip *chip, bool enable) +{ + int rc = 0; + + if (enable) { + rc = rradc_masked_write(chip, FG_ADC_RR_BATT_ID_CTRL, + FG_ADC_RR_BATT_ID_CTRL_CHANNEL_CONV, + FG_ADC_RR_BATT_ID_CTRL_CHANNEL_CONV); + if (rc < 0) { + pr_err("Enabling BATT ID channel failed:%d\n", rc); + return rc; + } + } else { + rc = rradc_masked_write(chip, FG_ADC_RR_BATT_ID_CTRL, + FG_ADC_RR_BATT_ID_CTRL_CHANNEL_CONV, 0); + if (rc < 0) { + pr_err("Disabling BATT ID channel failed:%d\n", rc); + return rc; + } + } + + return rc; +} + +static int rradc_do_batt_id_conversion(struct rradc_chip *chip, + struct rradc_chan_prop *prop, u16 *data, u8 *buf) +{ + int rc = 0, ret = 0; + + rc = rradc_enable_batt_id_channel(chip, true); + if (rc < 0) { + pr_err("Enabling BATT ID channel failed:%d\n", rc); + return rc; + } + + rc = rradc_masked_write(chip, FG_ADC_RR_BATT_ID_TRIGGER, + FG_ADC_RR_BATT_ID_TRIGGER_CTL, + FG_ADC_RR_BATT_ID_TRIGGER_CTL); + if (rc < 0) { + pr_err("BATT_ID trigger set failed:%d\n", rc); + ret = rc; + rc = rradc_enable_batt_id_channel(chip, false); + if (rc < 0) + pr_err("Disabling BATT ID channel failed:%d\n", rc); + return ret; + } + + rc = rradc_read_channel_with_continuous_mode(chip, prop, buf); + if (rc < 0) { + pr_err("Error reading in continuous mode:%d\n", rc); + ret = rc; + } + + rc = rradc_masked_write(chip, FG_ADC_RR_BATT_ID_TRIGGER, + FG_ADC_RR_BATT_ID_TRIGGER_CTL, 0); + if (rc < 0) { + pr_err("BATT_ID trigger re-set failed:%d\n", rc); + ret = rc; + } + + rc = rradc_enable_batt_id_channel(chip, false); + if (rc < 0) { + pr_err("Disabling BATT ID channel failed:%d\n", rc); + ret = rc; + } + + return ret; +} + static int rradc_do_conversion(struct rradc_chip *chip, struct rradc_chan_prop *prop, u16 *data) { @@ -765,24 +835,9 @@ static int rradc_do_conversion(struct rradc_chip *chip, switch (prop->channel) { case RR_ADC_BATT_ID: - rc = rradc_masked_write(chip, FG_ADC_RR_BATT_ID_TRIGGER, - FG_ADC_RR_BATT_ID_TRIGGER_CTL, - FG_ADC_RR_BATT_ID_TRIGGER_CTL); - if (rc < 0) { - pr_err("BATT_ID trigger set failed:%d\n", rc); - goto fail; - } - - rc = rradc_read_channel_with_continuous_mode(chip, prop, buf); - if (rc < 0) { - pr_err("Error reading in continuous mode:%d\n", rc); - goto fail; - } - - rc = rradc_masked_write(chip, FG_ADC_RR_BATT_ID_TRIGGER, - FG_ADC_RR_BATT_ID_TRIGGER_CTL, 0); + rc = rradc_do_batt_id_conversion(chip, prop, data, buf); if (rc < 0) { - pr_err("BATT_ID trigger re-set failed:%d\n", rc); + pr_err("Battery ID conversion failed:%d\n", rc); goto fail; } break; diff --git a/drivers/iio/adc/qcom-tadc.c b/drivers/iio/adc/qcom-tadc.c index 9241288c1d43..054dfcc8556a 100644 --- a/drivers/iio/adc/qcom-tadc.c +++ b/drivers/iio/adc/qcom-tadc.c @@ -18,7 +18,12 @@ #include <linux/of_irq.h> #include <linux/platform_device.h> #include <linux/regmap.h> +#include <linux/power_supply.h> +#include <linux/pmic-voter.h> +#define USB_PRESENT_VOTER "USB_PRESENT_VOTER" +#define SLEEP_VOTER "SLEEP_VOTER" +#define SHUTDOWN_VOTER "SHUTDOWN_VOTER" #define TADC_REVISION1_REG 0x00 #define TADC_REVISION2_REG 0x01 #define TADC_REVISION3_REG 0x02 @@ -54,6 +59,7 @@ #define TADC_CH7_ADC_HI_REG(chip) (chip->tadc_base + 0x73) #define TADC_CH8_ADC_LO_REG(chip) (chip->tadc_base + 0x74) #define TADC_CH8_ADC_HI_REG(chip) (chip->tadc_base + 0x75) +#define TADC_ADC_DIRECT_TST(chip) (chip->tadc_base + 0xE7) /* TADC_CMP register definitions */ #define TADC_CMP_THR1_CMP_REG(chip) (chip->tadc_cmp_base + 0x51) @@ -217,6 +223,11 @@ struct tadc_chip { struct tadc_chan_data chans[TADC_NUM_CH]; struct completion eoc_complete; struct mutex write_lock; + struct mutex conv_lock; + struct power_supply *usb_psy; + struct votable *tadc_disable_votable; + struct work_struct status_change_work; + struct notifier_block nb; }; struct tadc_pt { @@ -274,7 +285,7 @@ static bool tadc_is_reg_locked(struct tadc_chip *chip, u16 reg) if ((reg & 0xFF00) == chip->tadc_cmp_base) return true; - if (reg == TADC_HWTRIG_CONV_CH_EN_REG(chip)) + if (reg >= TADC_HWTRIG_CONV_CH_EN_REG(chip)) return true; return false; @@ -480,12 +491,22 @@ static int tadc_do_conversion(struct tadc_chip *chip, u8 channels, s16 *adc) { unsigned long timeout, timeleft; u8 val[TADC_NUM_CH * 2]; - int rc, i; + int rc = 0, i; + mutex_lock(&chip->conv_lock); rc = tadc_read(chip, TADC_MBG_ERR_REG(chip), val, 1); if (rc < 0) { pr_err("Couldn't read mbg error status rc=%d\n", rc); - return rc; + goto unlock; + } + + reinit_completion(&chip->eoc_complete); + + if (get_effective_result(chip->tadc_disable_votable)) { + /* leave it back in completed state */ + complete_all(&chip->eoc_complete); + rc = -ENODATA; + goto unlock; } if (val[0] != 0) { @@ -496,7 +517,7 @@ static int tadc_do_conversion(struct tadc_chip *chip, u8 channels, s16 *adc) rc = tadc_write(chip, TADC_CONV_REQ_REG(chip), channels); if (rc < 0) { pr_err("Couldn't write conversion request rc=%d\n", rc); - return rc; + goto unlock; } timeout = msecs_to_jiffies(CONVERSION_TIMEOUT_MS); @@ -506,25 +527,34 @@ static int tadc_do_conversion(struct tadc_chip *chip, u8 channels, s16 *adc) rc = tadc_read(chip, TADC_SW_CH_CONV_REG(chip), val, 1); if (rc < 0) { pr_err("Couldn't read conversion status rc=%d\n", rc); - return rc; + goto unlock; } + /* + * check one last time if the channel we are requesting + * has completed conversion + */ if (val[0] != channels) { - pr_err("Conversion timed out\n"); - return -ETIMEDOUT; + rc = -ETIMEDOUT; + goto unlock; } } rc = tadc_read(chip, TADC_CH1_ADC_LO_REG(chip), val, ARRAY_SIZE(val)); if (rc < 0) { pr_err("Couldn't read adc channels rc=%d\n", rc); - return rc; + goto unlock; } for (i = 0; i < TADC_NUM_CH; i++) adc[i] = (s16)(val[i * 2] | (u16)val[i * 2 + 1] << 8); - return jiffies_to_msecs(timeout - timeleft); + pr_debug("Conversion time for channels 0x%x = %dms\n", channels, + jiffies_to_msecs(timeout - timeleft)); + +unlock: + mutex_unlock(&chip->conv_lock); + return rc; } static int tadc_read_raw(struct iio_dev *indio_dev, @@ -593,12 +623,17 @@ static int tadc_read_raw(struct iio_dev *indio_dev, break; default: rc = tadc_do_conversion(chip, BIT(chan->channel), adc); - if (rc >= 0) - *val = adc[chan->channel]; + if (rc < 0) { + if (rc != -ENODATA) + pr_err("Couldn't read battery current and voltage channels rc=%d\n", + rc); + return rc; + } + *val = adc[chan->channel]; break; } - if (rc < 0) { + if (rc < 0 && rc != -ENODATA) { pr_err("Couldn't read channel %d\n", chan->channel); return rc; } @@ -630,7 +665,7 @@ static int tadc_read_raw(struct iio_dev *indio_dev, case TADC_BATT_P: rc = tadc_do_conversion(chip, BIT(TADC_BATT_I) | BIT(TADC_BATT_V), adc); - if (rc < 0) { + if (rc < 0 && rc != -ENODATA) { pr_err("Couldn't read battery current and voltage channels rc=%d\n", rc); return rc; @@ -641,7 +676,7 @@ static int tadc_read_raw(struct iio_dev *indio_dev, case TADC_INPUT_P: rc = tadc_do_conversion(chip, BIT(TADC_INPUT_I) | BIT(TADC_INPUT_V), adc); - if (rc < 0) { + if (rc < 0 && rc != -ENODATA) { pr_err("Couldn't read input current and voltage channels rc=%d\n", rc); return rc; @@ -683,6 +718,7 @@ static int tadc_read_raw(struct iio_dev *indio_dev, case TADC_DIE_TEMP: case TADC_DIE_TEMP_THR1: case TADC_DIE_TEMP_THR2: + case TADC_DIE_TEMP_THR3: *val = chan_data->scale; return IIO_VAL_INT; case TADC_BATT_I: @@ -821,15 +857,130 @@ static int tadc_write_raw(struct iio_dev *indio_dev, return 0; } - static irqreturn_t handle_eoc(int irq, void *dev_id) { struct tadc_chip *chip = dev_id; - complete(&chip->eoc_complete); + complete_all(&chip->eoc_complete); return IRQ_HANDLED; } +static int tadc_disable_vote_callback(struct votable *votable, + void *data, int disable, const char *client) +{ + struct tadc_chip *chip = data; + int rc; + int timeout; + unsigned long timeleft; + + if (disable) { + timeout = msecs_to_jiffies(CONVERSION_TIMEOUT_MS); + timeleft = wait_for_completion_timeout(&chip->eoc_complete, + timeout); + if (timeleft == 0) + pr_err("Timed out waiting for eoc, disabling hw conversions regardless\n"); + + rc = tadc_write(chip, TADC_HWTRIG_CONV_CH_EN_REG(chip), 0x00); + if (rc < 0) { + pr_err("Couldn't disable hw conversions rc=%d\n", rc); + return rc; + } + rc = tadc_write(chip, TADC_ADC_DIRECT_TST(chip), 0x80); + if (rc < 0) { + pr_err("Couldn't enable direct test mode rc=%d\n", rc); + return rc; + } + } else { + rc = tadc_write(chip, TADC_ADC_DIRECT_TST(chip), 0x00); + if (rc < 0) { + pr_err("Couldn't disable direct test mode rc=%d\n", rc); + return rc; + } + rc = tadc_write(chip, TADC_HWTRIG_CONV_CH_EN_REG(chip), 0x07); + if (rc < 0) { + pr_err("Couldn't enable hw conversions rc=%d\n", rc); + return rc; + } + } + + pr_debug("client: %s disable: %d\n", client, disable); + return 0; +} + +static void status_change_work(struct work_struct *work) +{ + struct tadc_chip *chip = container_of(work, + struct tadc_chip, status_change_work); + union power_supply_propval pval = {0, }; + int rc; + + if (!chip->usb_psy) + chip->usb_psy = power_supply_get_by_name("usb"); + + if (!chip->usb_psy) { + /* treat usb is not present */ + vote(chip->tadc_disable_votable, USB_PRESENT_VOTER, true, 0); + return; + } + + rc = power_supply_get_property(chip->usb_psy, + POWER_SUPPLY_PROP_PRESENT, &pval); + if (rc < 0) { + pr_err("Couldn't get present status rc=%d\n", rc); + /* treat usb is not present */ + vote(chip->tadc_disable_votable, USB_PRESENT_VOTER, true, 0); + return; + } + + /* disable if usb is not present */ + vote(chip->tadc_disable_votable, USB_PRESENT_VOTER, !pval.intval, 0); +} + +static int tadc_notifier_call(struct notifier_block *nb, + unsigned long ev, void *v) +{ + struct power_supply *psy = v; + struct tadc_chip *chip = container_of(nb, struct tadc_chip, nb); + + if (ev != PSY_EVENT_PROP_CHANGED) + return NOTIFY_OK; + + if ((strcmp(psy->desc->name, "usb") == 0)) + schedule_work(&chip->status_change_work); + + return NOTIFY_OK; +} + +static int tadc_register_notifier(struct tadc_chip *chip) +{ + int rc; + + chip->nb.notifier_call = tadc_notifier_call; + rc = power_supply_reg_notifier(&chip->nb); + if (rc < 0) { + pr_err("Couldn't register psy notifier rc = %d\n", rc); + return rc; + } + + return 0; +} + +static int tadc_suspend(struct device *dev) +{ + struct tadc_chip *chip = dev_get_drvdata(dev); + + vote(chip->tadc_disable_votable, SLEEP_VOTER, true, 0); + return 0; +} + +static int tadc_resume(struct device *dev) +{ + struct tadc_chip *chip = dev_get_drvdata(dev); + + vote(chip->tadc_disable_votable, SLEEP_VOTER, false, 0); + return 0; +} + static int tadc_set_therm_table(struct tadc_chan_data *chan_data, u32 beta, u32 rtherm) { @@ -1009,6 +1160,12 @@ static int tadc_probe(struct platform_device *pdev) chip->dev = &pdev->dev; init_completion(&chip->eoc_complete); + /* + * set the completion in "completed" state so disable of the tadc + * can progress + */ + complete_all(&chip->eoc_complete); + rc = of_property_read_u32(node, "reg", &chip->tadc_base); if (rc < 0) { pr_err("Couldn't read base address rc=%d\n", rc); @@ -1017,6 +1174,8 @@ static int tadc_probe(struct platform_device *pdev) chip->tadc_cmp_base = chip->tadc_base + 0x100; mutex_init(&chip->write_lock); + mutex_init(&chip->conv_lock); + INIT_WORK(&chip->status_change_work, status_change_work); chip->regmap = dev_get_regmap(chip->dev->parent, NULL); if (!chip->regmap) { pr_err("Couldn't get regmap\n"); @@ -1035,17 +1194,36 @@ static int tadc_probe(struct platform_device *pdev) return rc; } + chip->tadc_disable_votable = create_votable("SMB_TADC_DISABLE", + VOTE_SET_ANY, + tadc_disable_vote_callback, + chip); + if (IS_ERR(chip->tadc_disable_votable)) { + rc = PTR_ERR(chip->tadc_disable_votable); + return rc; + } + /* assume usb is not present */ + vote(chip->tadc_disable_votable, USB_PRESENT_VOTER, true, 0); + vote(chip->tadc_disable_votable, SHUTDOWN_VOTER, false, 0); + vote(chip->tadc_disable_votable, SLEEP_VOTER, false, 0); + + rc = tadc_register_notifier(chip); + if (rc < 0) { + pr_err("Couldn't register notifier=%d\n", rc); + goto destroy_votable; + } + irq = of_irq_get_byname(node, "eoc"); if (irq < 0) { pr_err("Couldn't get eoc irq rc=%d\n", irq); - return irq; + goto destroy_votable; } rc = devm_request_threaded_irq(chip->dev, irq, NULL, handle_eoc, IRQF_ONESHOT, "eoc", chip); if (rc < 0) { pr_err("Couldn't request irq %d rc=%d\n", irq, rc); - return rc; + goto destroy_votable; } indio_dev->dev.parent = chip->dev; @@ -1058,17 +1236,37 @@ static int tadc_probe(struct platform_device *pdev) rc = devm_iio_device_register(chip->dev, indio_dev); if (rc < 0) { pr_err("Couldn't register IIO device rc=%d\n", rc); - return rc; + goto destroy_votable; } + platform_set_drvdata(pdev, chip); return 0; + +destroy_votable: + destroy_votable(chip->tadc_disable_votable); + return rc; } static int tadc_remove(struct platform_device *pdev) { + struct tadc_chip *chip = platform_get_drvdata(pdev); + + destroy_votable(chip->tadc_disable_votable); return 0; } +static void tadc_shutdown(struct platform_device *pdev) +{ + struct tadc_chip *chip = platform_get_drvdata(pdev); + + vote(chip->tadc_disable_votable, SHUTDOWN_VOTER, true, 0); +} + +static const struct dev_pm_ops tadc_pm_ops = { + .resume = tadc_resume, + .suspend = tadc_suspend, +}; + static const struct of_device_id tadc_match_table[] = { { .compatible = "qcom,tadc" }, { } @@ -1076,12 +1274,14 @@ static const struct of_device_id tadc_match_table[] = { MODULE_DEVICE_TABLE(of, tadc_match_table); static struct platform_driver tadc_driver = { - .driver = { + .driver = { .name = "qcom-tadc", .of_match_table = tadc_match_table, + .pm = &tadc_pm_ops, }, - .probe = tadc_probe, - .remove = tadc_remove, + .probe = tadc_probe, + .remove = tadc_remove, + .shutdown = tadc_shutdown, }; module_platform_driver(tadc_driver); |