Merge tag 'fixes-for-4.13b' of git://git.kernel.org/pub/scm/linux/kernel/git/jic23/iio into staging-linus

Jonathan writes:

Second set of IIO fixes for the 4.13 cycle.

Given the late stage of this series, some more involved fixes have been
held back for the upcoming merge window.

The hid-sensor issue has been causing problems for a long time so it
is great to have that one finally fixed!  No more bug reports for the
userspace guys (well about that anyway).

* documentation
  - some warning fixes due to missing colons in kernel-doc.
* adis16480
  - fix accel scale factor.
* bmp280
  - properly initialize the device for humidity readings - without this
  the humidity readings may be skipped and a magic value of 0x8000 returned.
* hid-sensor-strigger
  - fix a race with user space when powering up the sensor.
* ina291
  - Avoid an underflow for the sleeping time as a result of supporting the
  fastest rates.
* st-magnetometer
  - Fix the status register address for hte LSM303AGR,
  - Remove the ihl property for LSM303AGR as the sensor doesn't support
  active low for the dataready line.
* stm32-adc
  - Fix use of a common clock rate.
* stm32-timer
  - fix the quadrature mode get routine to account for the magic 0 value.
  set on boot.
  - fix the return value of write_raw,
  - fix the get/set down count direction as the enum value was not being
  converted to the relevant bit field,
  - add an enable attribute to actually turn it on when in encoder mode,
  - missing mask when reading the trigger mode.

10 files changed, 103 insertions, 43 deletions

diff --git a/drivers/iio/adc/ina2xx-adc.c b/drivers/iio/adc/ina2xx-adc.c
index 232c0b80d658..c3f86138cb55 100644
--- a/drivers/iio/adc/ina2xx-adc.c
+++ b/drivers/iio/adc/ina2xx-adc.c
@@ -644,7 +644,7 @@ static int ina2xx_capture_thread(void *data)
 {
 	struct iio_dev *indio_dev = data;
 	struct ina2xx_chip_info *chip = iio_priv(indio_dev);
-	unsigned int sampling_us = SAMPLING_PERIOD(chip);
+	int sampling_us = SAMPLING_PERIOD(chip);
 	int buffer_us;
 
 	/*
diff --git a/drivers/iio/adc/stm32-adc-core.c b/drivers/iio/adc/stm32-adc-core.c
index e09233b03c05..609676384f5e 100644
--- a/drivers/iio/adc/stm32-adc-core.c
+++ b/drivers/iio/adc/stm32-adc-core.c
@@ -64,7 +64,7 @@
 #define STM32H7_CKMODE_MASK		GENMASK(17, 16)
 
 /* STM32 H7 maximum analog clock rate (from datasheet) */
-#define STM32H7_ADC_MAX_CLK_RATE	72000000
+#define STM32H7_ADC_MAX_CLK_RATE	36000000
 
 /**
  * stm32_adc_common_regs - stm32 common registers, compatible dependent data
@@ -148,14 +148,14 @@ static int stm32f4_adc_clk_sel(struct platform_device *pdev,
 		return -EINVAL;
 	}
 
-	priv->common.rate = rate;
+	priv->common.rate = rate / stm32f4_pclk_div[i];
 	val = readl_relaxed(priv->common.base + STM32F4_ADC_CCR);
 	val &= ~STM32F4_ADC_ADCPRE_MASK;
 	val |= i << STM32F4_ADC_ADCPRE_SHIFT;
 	writel_relaxed(val, priv->common.base + STM32F4_ADC_CCR);
 
 	dev_dbg(&pdev->dev, "Using analog clock source at %ld kHz\n",
-		rate / (stm32f4_pclk_div[i] * 1000));
+		priv->common.rate / 1000);
 
 	return 0;
 }
@@ -250,7 +250,7 @@ static int stm32h7_adc_clk_sel(struct platform_device *pdev,
 
 out:
 	/* rate used later by each ADC instance to control BOOST mode */
-	priv->common.rate = rate;
+	priv->common.rate = rate / div;
 
 	/* Set common clock mode and prescaler */
 	val = readl_relaxed(priv->common.base + STM32H7_ADC_CCR);
@@ -260,7 +260,7 @@ out:
 	writel_relaxed(val, priv->common.base + STM32H7_ADC_CCR);
 
 	dev_dbg(&pdev->dev, "Using %s clock/%d source at %ld kHz\n",
-		ckmode ? "bus" : "adc", div, rate / (div * 1000));
+		ckmode ? "bus" : "adc", div, priv->common.rate / 1000);
 
 	return 0;
 }
diff --git a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
index 16ade0a0327b..0e4b379ada45 100644
--- a/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
+++ b/drivers/iio/common/hid-sensors/hid-sensor-trigger.c
@@ -111,8 +111,6 @@ static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state)
 	s32 poll_value = 0;
 
 	if (state) {
-		if (!atomic_read(&st->user_requested_state))
-			return 0;
 		if (sensor_hub_device_open(st->hsdev))
 			return -EIO;
 
@@ -161,6 +159,9 @@ static int _hid_sensor_power_state(struct hid_sensor_common *st, bool state)
 				       &report_val);
 	}
 
+	pr_debug("HID_SENSOR %s set power_state %d report_state %d\n",
+		 st->pdev->name, state_val, report_val);
+
 	sensor_hub_get_feature(st->hsdev, st->power_state.report_id,
 			       st->power_state.index,
 			       sizeof(state_val), &state_val);
@@ -182,6 +183,7 @@ int hid_sensor_power_state(struct hid_sensor_common *st, bool state)
 		ret = pm_runtime_get_sync(&st->pdev->dev);
 	else {
 		pm_runtime_mark_last_busy(&st->pdev->dev);
+		pm_runtime_use_autosuspend(&st->pdev->dev);
 		ret = pm_runtime_put_autosuspend(&st->pdev->dev);
 	}
 	if (ret < 0) {
@@ -285,8 +287,6 @@ int hid_sensor_setup_trigger(struct iio_dev *indio_dev, const char *name,
 	/* Default to 3 seconds, but can be changed from sysfs */
 	pm_runtime_set_autosuspend_delay(&attrb->pdev->dev,
 					 3000);
-	pm_runtime_use_autosuspend(&attrb->pdev->dev);
-
 	return ret;
 error_unreg_trigger:
 	iio_trigger_unregister(trig);
diff --git a/drivers/iio/imu/adis16480.c b/drivers/iio/imu/adis16480.c
index 8cf84d3488b2..12898424d838 100644
--- a/drivers/iio/imu/adis16480.c
+++ b/drivers/iio/imu/adis16480.c
@@ -696,7 +696,7 @@ static const struct adis16480_chip_info adis16480_chip_info[] = {
 		.gyro_max_val = IIO_RAD_TO_DEGREE(22500),
 		.gyro_max_scale = 450,
 		.accel_max_val = IIO_M_S_2_TO_G(12500),
-		.accel_max_scale = 5,
+		.accel_max_scale = 10,
 	},
 	[ADIS16485] = {
 		.channels = adis16485_channels,
diff --git a/drivers/iio/magnetometer/st_magn_core.c b/drivers/iio/magnetometer/st_magn_core.c
index 8e1b0861fbe4..c38563699984 100644
--- a/drivers/iio/magnetometer/st_magn_core.c
+++ b/drivers/iio/magnetometer/st_magn_core.c
@@ -356,9 +356,7 @@ static const struct st_sensor_settings st_magn_sensors_settings[] = {
 		.drdy_irq = {
 			.addr = 0x62,
 			.mask_int1 = 0x01,
-			.addr_ihl = 0x63,
-			.mask_ihl = 0x04,
-			.addr_stat_drdy = ST_SENSORS_DEFAULT_STAT_ADDR,
+			.addr_stat_drdy = 0x67,
 		},
 		.multi_read_bit = false,
 		.bootime = 2,
diff --git a/drivers/iio/pressure/bmp280-core.c b/drivers/iio/pressure/bmp280-core.c
index d82b788374b6..0d2ea3ee371b 100644
--- a/drivers/iio/pressure/bmp280-core.c
+++ b/drivers/iio/pressure/bmp280-core.c
@@ -282,6 +282,11 @@ static int bmp280_read_temp(struct bmp280_data *data,
 	}
 
 	adc_temp = be32_to_cpu(tmp) >> 12;
+	if (adc_temp == BMP280_TEMP_SKIPPED) {
+		/* reading was skipped */
+		dev_err(data->dev, "reading temperature skipped\n");
+		return -EIO;
+	}
 	comp_temp = bmp280_compensate_temp(data, adc_temp);
 
 	/*
@@ -317,6 +322,11 @@ static int bmp280_read_press(struct bmp280_data *data,
 	}
 
 	adc_press = be32_to_cpu(tmp) >> 12;
+	if (adc_press == BMP280_PRESS_SKIPPED) {
+		/* reading was skipped */
+		dev_err(data->dev, "reading pressure skipped\n");
+		return -EIO;
+	}
 	comp_press = bmp280_compensate_press(data, adc_press);
 
 	*val = comp_press;
@@ -345,6 +355,11 @@ static int bmp280_read_humid(struct bmp280_data *data, int *val, int *val2)
 	}
 
 	adc_humidity = be16_to_cpu(tmp);
+	if (adc_humidity == BMP280_HUMIDITY_SKIPPED) {
+		/* reading was skipped */
+		dev_err(data->dev, "reading humidity skipped\n");
+		return -EIO;
+	}
 	comp_humidity = bmp280_compensate_humidity(data, adc_humidity);
 
 	*val = comp_humidity;
@@ -597,14 +612,20 @@ static const struct bmp280_chip_info bmp280_chip_info = {
 
 static int bme280_chip_config(struct bmp280_data *data)
 {
-	int ret = bmp280_chip_config(data);
+	int ret;
 	u8 osrs = BMP280_OSRS_HUMIDITIY_X(data->oversampling_humid + 1);
 
+	/*
+	 * Oversampling of humidity must be set before oversampling of
+	 * temperature/pressure is set to become effective.
+	 */
+	ret = regmap_update_bits(data->regmap, BMP280_REG_CTRL_HUMIDITY,
+				  BMP280_OSRS_HUMIDITY_MASK, osrs);
+
 	if (ret < 0)
 		return ret;
 
-	return regmap_update_bits(data->regmap, BMP280_REG_CTRL_HUMIDITY,
-				  BMP280_OSRS_HUMIDITY_MASK, osrs);
+	return bmp280_chip_config(data);
 }
 
 static const struct bmp280_chip_info bme280_chip_info = {
diff --git a/drivers/iio/pressure/bmp280.h b/drivers/iio/pressure/bmp280.h
index 2c770e13be0e..61347438b779 100644
--- a/drivers/iio/pressure/bmp280.h
+++ b/drivers/iio/pressure/bmp280.h
@@ -96,6 +96,11 @@
 #define BME280_CHIP_ID			0x60
 #define BMP280_SOFT_RESET_VAL		0xB6
 
+/* BMP280 register skipped special values */
+#define BMP280_TEMP_SKIPPED		0x80000
+#define BMP280_PRESS_SKIPPED		0x80000
+#define BMP280_HUMIDITY_SKIPPED		0x8000
+
 /* Regmap configurations */
 extern const struct regmap_config bmp180_regmap_config;
 extern const struct regmap_config bmp280_regmap_config;
diff --git a/drivers/iio/trigger/stm32-timer-trigger.c b/drivers/iio/trigger/stm32-timer-trigger.c
index d22bc56dd9fc..25ad6abfee22 100644
--- a/drivers/iio/trigger/stm32-timer-trigger.c
+++ b/drivers/iio/trigger/stm32-timer-trigger.c
@@ -366,34 +366,32 @@ static int stm32_counter_read_raw(struct iio_dev *indio_dev,
 				  int *val, int *val2, long mask)
 {
 	struct stm32_timer_trigger *priv = iio_priv(indio_dev);
+	u32 dat;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-	{
-		u32 cnt;
-
-		regmap_read(priv->regmap, TIM_CNT, &cnt);
-		*val = cnt;
+		regmap_read(priv->regmap, TIM_CNT, &dat);
+		*val = dat;
+		return IIO_VAL_INT;
 
+	case IIO_CHAN_INFO_ENABLE:
+		regmap_read(priv->regmap, TIM_CR1, &dat);
+		*val = (dat & TIM_CR1_CEN) ? 1 : 0;
 		return IIO_VAL_INT;
-	}
-	case IIO_CHAN_INFO_SCALE:
-	{
-		u32 smcr;
 
-		regmap_read(priv->regmap, TIM_SMCR, &smcr);
-		smcr &= TIM_SMCR_SMS;
+	case IIO_CHAN_INFO_SCALE:
+		regmap_read(priv->regmap, TIM_SMCR, &dat);
+		dat &= TIM_SMCR_SMS;
 
 		*val = 1;
 		*val2 = 0;
 
 		/* in quadrature case scale = 0.25 */
-		if (smcr == 3)
+		if (dat == 3)
 			*val2 = 2;
 
 		return IIO_VAL_FRACTIONAL_LOG2;
 	}
-	}
 
 	return -EINVAL;
 }
@@ -403,15 +401,31 @@ static int stm32_counter_write_raw(struct iio_dev *indio_dev,
 				   int val, int val2, long mask)
 {
 	struct stm32_timer_trigger *priv = iio_priv(indio_dev);
+	u32 dat;
 
 	switch (mask) {
 	case IIO_CHAN_INFO_RAW:
-		regmap_write(priv->regmap, TIM_CNT, val);
+		return regmap_write(priv->regmap, TIM_CNT, val);
 
-		return IIO_VAL_INT;
 	case IIO_CHAN_INFO_SCALE:
 		/* fixed scale */
 		return -EINVAL;
+
+	case IIO_CHAN_INFO_ENABLE:
+		if (val) {
+			regmap_read(priv->regmap, TIM_CR1, &dat);
+			if (!(dat & TIM_CR1_CEN))
+				clk_enable(priv->clk);
+			regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN,
+					   TIM_CR1_CEN);
+		} else {
+			regmap_read(priv->regmap, TIM_CR1, &dat);
+			regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_CEN,
+					   0);
+			if (dat & TIM_CR1_CEN)
+				clk_disable(priv->clk);
+		}
+		return 0;
 	}
 
 	return -EINVAL;
@@ -471,7 +485,7 @@ static int stm32_get_trigger_mode(struct iio_dev *indio_dev,
 
 	regmap_read(priv->regmap, TIM_SMCR, &smcr);
 
-	return smcr == TIM_SMCR_SMS ? 0 : -EINVAL;
+	return (smcr & TIM_SMCR_SMS) == TIM_SMCR_SMS ? 0 : -EINVAL;
 }
 
 static const struct iio_enum stm32_trigger_mode_enum = {
@@ -507,9 +521,19 @@ static int stm32_set_enable_mode(struct iio_dev *indio_dev,
 {
 	struct stm32_timer_trigger *priv = iio_priv(indio_dev);
 	int sms = stm32_enable_mode2sms(mode);
+	u32 val;
 
 	if (sms < 0)
 		return sms;
+	/*
+	 * Triggered mode sets CEN bit automatically by hardware. So, first
+	 * enable counter clock, so it can use it. Keeps it in sync with CEN.
+	 */
+	if (sms == 6) {
+		regmap_read(priv->regmap, TIM_CR1, &val);
+		if (!(val & TIM_CR1_CEN))
+			clk_enable(priv->clk);
+	}
 
 	regmap_update_bits(priv->regmap, TIM_SMCR, TIM_SMCR_SMS, sms);
 
@@ -571,11 +595,14 @@ static int stm32_get_quadrature_mode(struct iio_dev *indio_dev,
 {
 	struct stm32_timer_trigger *priv = iio_priv(indio_dev);
 	u32 smcr;
+	int mode;
 
 	regmap_read(priv->regmap, TIM_SMCR, &smcr);
-	smcr &= TIM_SMCR_SMS;
+	mode = (smcr & TIM_SMCR_SMS) - 1;
+	if ((mode < 0) || (mode > ARRAY_SIZE(stm32_quadrature_modes)))
+		return -EINVAL;
 
-	return smcr - 1;
+	return mode;
 }
 
 static const struct iio_enum stm32_quadrature_mode_enum = {
@@ -592,13 +619,20 @@ static const char *const stm32_count_direction_states[] = {
 
 static int stm32_set_count_direction(struct iio_dev *indio_dev,
 				     const struct iio_chan_spec *chan,
-				     unsigned int mode)
+				     unsigned int dir)
 {
 	struct stm32_timer_trigger *priv = iio_priv(indio_dev);
+	u32 val;
+	int mode;
 
-	regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_DIR, mode);
+	/* In encoder mode, direction is RO (given by TI1/TI2 signals) */
+	regmap_read(priv->regmap, TIM_SMCR, &val);
+	mode = (val & TIM_SMCR_SMS) - 1;
+	if ((mode >= 0) || (mode < ARRAY_SIZE(stm32_quadrature_modes)))
+		return -EBUSY;
 
-	return 0;
+	return regmap_update_bits(priv->regmap, TIM_CR1, TIM_CR1_DIR,
+				  dir ? TIM_CR1_DIR : 0);
 }
 
 static int stm32_get_count_direction(struct iio_dev *indio_dev,
@@ -609,7 +643,7 @@ static int stm32_get_count_direction(struct iio_dev *indio_dev,
 
 	regmap_read(priv->regmap, TIM_CR1, &cr1);
 
-	return (cr1 & TIM_CR1_DIR);
+	return ((cr1 & TIM_CR1_DIR) ? 1 : 0);
 }
 
 static const struct iio_enum stm32_count_direction_enum = {
@@ -672,7 +706,9 @@ static const struct iio_chan_spec_ext_info stm32_trigger_count_info[] = {
 static const struct iio_chan_spec stm32_trigger_channel = {
 	.type = IIO_COUNT,
 	.channel = 0,
-	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) | BIT(IIO_CHAN_INFO_SCALE),
+	.info_mask_separate = BIT(IIO_CHAN_INFO_RAW) |
+			      BIT(IIO_CHAN_INFO_ENABLE) |
+			      BIT(IIO_CHAN_INFO_SCALE),
 	.ext_info = stm32_trigger_count_info,
 	.indexed = 1
 };
diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h
index d68bec297a45..c380daa40c0e 100644
--- a/include/linux/iio/iio.h
+++ b/include/linux/iio/iio.h
@@ -535,7 +535,7 @@ struct iio_buffer_setup_ops {
  * @scan_timestamp:	[INTERN] set if any buffers have requested timestamp
  * @scan_index_timestamp:[INTERN] cache of the index to the timestamp
  * @trig:		[INTERN] current device trigger (buffer modes)
- * @trig_readonly	[INTERN] mark the current trigger immutable
+ * @trig_readonly:	[INTERN] mark the current trigger immutable
  * @pollfunc:		[DRIVER] function run on trigger being received
  * @pollfunc_event:	[DRIVER] function run on events trigger being received
  * @channels:		[DRIVER] channel specification structure table
diff --git a/include/linux/iio/trigger.h b/include/linux/iio/trigger.h
index ea08302f2d7b..7142d8d6e470 100644
--- a/include/linux/iio/trigger.h
+++ b/include/linux/iio/trigger.h
@@ -144,8 +144,8 @@ void devm_iio_trigger_unregister(struct device *dev,
 /**
  * iio_trigger_set_immutable() - set an immutable trigger on destination
  *
- * @indio_dev - IIO device structure containing the device
- * @trig - trigger to assign to device
+ * @indio_dev: IIO device structure containing the device
+ * @trig: trigger to assign to device
  *
  **/
 int iio_trigger_set_immutable(struct iio_dev *indio_dev, struct iio_trigger *trig);