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[PATCH v2 0/9] staging: iio: tsl2x7x: staging cleanups

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  [PATCH v2 0/9] staging: iio: tsl2x7x: staging cleanups Brian Masney <masneyb@onstation.org> - 2017-07-07 01:00 +0200
    [PATCH v2 8/9] staging: iio: tsl2x7x: migrate in_illuminance0_integration_time sysfs attribute to iio_chan_spec Brian Masney <masneyb@onstation.org> - 2017-07-07 01:00 +0200
      Re: [PATCH v2 8/9] staging: iio: tsl2x7x: migrate  in_illuminance0_integration_time sysfs attribute to iio_chan_spec Jonathan Cameron <jic23@kernel.org> - 2017-07-09 19:50 +0200
    [PATCH v2 2/9] staging: iio: tsl2x7x: add device tree documentation Brian Masney <masneyb@onstation.org> - 2017-07-07 01:00 +0200
      Re: [PATCH v2 2/9] staging: iio: tsl2x7x: add device tree  documentation Jonathan Cameron <jic23@kernel.org> - 2017-07-09 19:30 +0200
      Re: [PATCH v2 2/9] staging: iio: tsl2x7x: add device tree  documentation Rob Herring <robh@kernel.org> - 2017-07-10 16:20 +0200
    [PATCH v2 4/9] staging: iio: tsl2x7x: remove tsl2x7x_i2c_read() Brian Masney <masneyb@onstation.org> - 2017-07-07 01:00 +0200
      Re: [PATCH v2 4/9] staging: iio: tsl2x7x: remove tsl2x7x_i2c_read() Jonathan Cameron <jic23@kernel.org> - 2017-07-09 19:30 +0200
    [PATCH v2 3/9] staging: iio: tsl2x7x: remove redundant power_state sysfs attribute Brian Masney <masneyb@onstation.org> - 2017-07-07 01:00 +0200
      Re: [PATCH v2 3/9] staging: iio: tsl2x7x: remove redundant  power_state sysfs attribute Jonathan Cameron <jic23@kernel.org> - 2017-07-09 19:30 +0200

#1682790 — [PATCH v2 0/9] staging: iio: tsl2x7x: staging cleanups

This begins my work to clean this driver up and eventually move it out
of staging. Driver changes were tested using a TSL2771 hooked up to a
Raspberry Pi 2.

Thanks to Jon Brenner at AMS/TAOS for loaning me some hardware samples
to test my driver changes.

Changes since v1:
- checkpatch cleanups (oops)
- Split out the device tree documentation and driver change into
  two separate commits so that the changes can be accepted in separate
  trees to avoid merge conflicts later.
- New patch: migrate in_illuminance0_integration_time sysfs
  attribute to iio_chan_spec
- New patch: check return value from tsl2x7x_invoke_change()

Brian Masney (9):
  staging: iio: tsl2x7x: add of_match table for device tree support
  staging: iio: tsl2x7x: add device tree documentation
  staging: iio: tsl2x7x: remove redundant power_state sysfs attribute
  staging: iio: tsl2x7x: remove tsl2x7x_i2c_read()
  staging: iio: tsl2x7x: cleaned up i2c calls in tsl2x7x_als_calibrate()
  staging: iio: tsl2x7x: refactor {read,write}_event_value to allow
    handling multiple iio_event_infos
  staging: iio: tsl2x7x: use usleep_range() instead of mdelay()
  staging: iio: tsl2x7x: migrate in_illuminance0_integration_time sysfs
    attribute to iio_chan_spec
  staging: iio: tsl2x7x: check return value from tsl2x7x_invoke_change()

 .../devicetree/bindings/trivial-devices.txt        |  10 +
 drivers/staging/iio/light/tsl2x7x.c                | 440 ++++++++++-----------
 2 files changed, 209 insertions(+), 241 deletions(-)

-- 
2.9.4

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#1682791 — [PATCH v2 8/9] staging: iio: tsl2x7x: migrate in_illuminance0_integration_time sysfs attribute to iio_chan_spec

The driver explicitly creates the in_illuminance0_integration_time sysfs
attribute outside the IIO core. This attribute is available in the IIO
core so this patches migrates the attribute to be created by
the iio_chan_spec.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/staging/iio/light/tsl2x7x.c | 68 +++++++++++--------------------------
 1 file changed, 19 insertions(+), 49 deletions(-)

diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
index c38bd64..033468d 100644
--- a/drivers/staging/iio/light/tsl2x7x.c
+++ b/drivers/staging/iio/light/tsl2x7x.c
@@ -905,46 +905,6 @@ static ssize_t in_proximity0_calibscale_available_show(struct device *dev,
 		return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
 }
 
-static ssize_t in_illuminance0_integration_time_show(struct device *dev,
-				     struct device_attribute *attr,
-				     char *buf)
-{
-	struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
-	int y, z;
-
-	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
-	z = y * TSL2X7X_MIN_ITIME;
-	y /= 1000;
-	z %= 1000;
-
-	return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
-}
-
-static ssize_t in_illuminance0_integration_time_store(struct device *dev,
-				      struct device_attribute *attr,
-				      const char *buf, size_t len)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
-	struct tsl2x7x_parse_result result;
-	int ret;
-
-	ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
-	if (ret)
-		return ret;
-
-	result.fract /= 3;
-	chip->tsl2x7x_settings.als_time =
-			TSL2X7X_MAX_TIMER_CNT - (u8)result.fract;
-
-	dev_info(&chip->client->dev, "%s: als time = %d",
-		 __func__, chip->tsl2x7x_settings.als_time);
-
-	tsl2x7x_invoke_change(indio_dev);
-
-	return IIO_VAL_INT_PLUS_MICRO;
-}
-
 static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
 		".00272 - .696");
 
@@ -1369,7 +1329,13 @@ static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
 		*val = chip->tsl2x7x_settings.als_gain_trim;
 		ret = IIO_VAL_INT;
 		break;
-
+	case IIO_CHAN_INFO_INT_TIME:
+		*val = (TSL2X7X_MAX_TIMER_CNT - chip->tsl2x7x_settings.als_time)
+			+ 1;
+		*val2 = (*val * TSL2X7X_MIN_ITIME) % 1000;
+		*val /= 1000;
+		ret = IIO_VAL_INT_PLUS_MICRO;
+		break;
 	default:
 		ret = -EINVAL;
 	}
@@ -1445,7 +1411,13 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
 	case IIO_CHAN_INFO_CALIBBIAS:
 		chip->tsl2x7x_settings.als_gain_trim = val;
 		break;
+	case IIO_CHAN_INFO_INT_TIME:
+		chip->tsl2x7x_settings.als_time =
+			TSL2X7X_MAX_TIMER_CNT - (val2 / 3);
 
+		dev_info(&chip->client->dev, "%s: als time = %d",
+			 __func__, chip->tsl2x7x_settings.als_time);
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -1459,8 +1431,6 @@ static DEVICE_ATTR_RO(in_proximity0_calibscale_available);
 
 static DEVICE_ATTR_RO(in_illuminance0_calibscale_available);
 
-static DEVICE_ATTR_RW(in_illuminance0_integration_time);
-
 static DEVICE_ATTR_RW(in_illuminance0_target_input);
 
 static DEVICE_ATTR_WO(in_illuminance0_calibrate);
@@ -1540,7 +1510,6 @@ static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
 
 static struct attribute *tsl2x7x_ALS_device_attrs[] = {
 	&dev_attr_in_illuminance0_calibscale_available.attr,
-	&dev_attr_in_illuminance0_integration_time.attr,
 	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
 	&dev_attr_in_illuminance0_target_input.attr,
 	&dev_attr_in_illuminance0_calibrate.attr,
@@ -1555,7 +1524,6 @@ static struct attribute *tsl2x7x_PRX_device_attrs[] = {
 
 static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
 	&dev_attr_in_illuminance0_calibscale_available.attr,
-	&dev_attr_in_illuminance0_integration_time.attr,
 	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
 	&dev_attr_in_illuminance0_target_input.attr,
 	&dev_attr_in_illuminance0_calibrate.attr,
@@ -1572,7 +1540,6 @@ static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
 
 static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
 	&dev_attr_in_illuminance0_calibscale_available.attr,
-	&dev_attr_in_illuminance0_integration_time.attr,
 	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
 	&dev_attr_in_illuminance0_target_input.attr,
 	&dev_attr_in_illuminance0_calibrate.attr,
@@ -1710,7 +1677,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.type = IIO_LIGHT,
 			.indexed = 1,
 			.channel = 0,
-			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+					      BIT(IIO_CHAN_INFO_INT_TIME),
 			}, {
 			.type = IIO_INTENSITY,
 			.indexed = 1,
@@ -1749,7 +1717,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.type = IIO_LIGHT,
 			.indexed = 1,
 			.channel = 0,
-			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED)
+			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+					      BIT(IIO_CHAN_INFO_INT_TIME),
 			}, {
 			.type = IIO_INTENSITY,
 			.indexed = 1,
@@ -1797,7 +1766,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
 			.type = IIO_LIGHT,
 			.indexed = 1,
 			.channel = 0,
-			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
+			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
+					      BIT(IIO_CHAN_INFO_INT_TIME),
 			}, {
 			.type = IIO_INTENSITY,
 			.indexed = 1,
-- 
2.9.4

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#1683782 — Re: [PATCH v2 8/9] staging: iio: tsl2x7x: migrate in_illuminance0_integration_time sysfs attribute to iio_chan_spec

On Thu,  6 Jul 2017 18:56:25 -0400
Brian Masney <masneyb@onstation.org> wrote:

> The driver explicitly creates the in_illuminance0_integration_time sysfs
> attribute outside the IIO core. This attribute is available in the IIO
> core so this patches migrates the attribute to be created by
> the iio_chan_spec.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> ---
>  drivers/staging/iio/light/tsl2x7x.c | 68 +++++++++++--------------------------
>  1 file changed, 19 insertions(+), 49 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
> index c38bd64..033468d 100644
> --- a/drivers/staging/iio/light/tsl2x7x.c
> +++ b/drivers/staging/iio/light/tsl2x7x.c
> @@ -905,46 +905,6 @@ static ssize_t in_proximity0_calibscale_available_show(struct device *dev,
>  		return snprintf(buf, PAGE_SIZE, "%s\n", "1 2 4 8");
>  }
>  
> -static ssize_t in_illuminance0_integration_time_show(struct device *dev,
> -				     struct device_attribute *attr,
> -				     char *buf)
> -{
> -	struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
> -	int y, z;
> -
> -	y = (TSL2X7X_MAX_TIMER_CNT - (u8)chip->tsl2x7x_settings.als_time) + 1;
> -	z = y * TSL2X7X_MIN_ITIME;
> -	y /= 1000;
> -	z %= 1000;
> -
> -	return snprintf(buf, PAGE_SIZE, "%d.%03d\n", y, z);
> -}
> -
> -static ssize_t in_illuminance0_integration_time_store(struct device *dev,
> -				      struct device_attribute *attr,
> -				      const char *buf, size_t len)
> -{
> -	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
> -	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
> -	struct tsl2x7x_parse_result result;
> -	int ret;
> -
> -	ret = iio_str_to_fixpoint(buf, 100, &result.integer, &result.fract);
> -	if (ret)
> -		return ret;
> -
> -	result.fract /= 3;
> -	chip->tsl2x7x_settings.als_time =
> -			TSL2X7X_MAX_TIMER_CNT - (u8)result.fract;
> -
> -	dev_info(&chip->client->dev, "%s: als time = %d",
> -		 __func__, chip->tsl2x7x_settings.als_time);
> -
> -	tsl2x7x_invoke_change(indio_dev);
> -
> -	return IIO_VAL_INT_PLUS_MICRO;
> -}
> -
>  static IIO_CONST_ATTR(in_illuminance0_integration_time_available,
>  		".00272 - .696");
>  
> @@ -1369,7 +1329,13 @@ static int tsl2x7x_read_raw(struct iio_dev *indio_dev,
>  		*val = chip->tsl2x7x_settings.als_gain_trim;
>  		ret = IIO_VAL_INT;
>  		break;
> -
> +	case IIO_CHAN_INFO_INT_TIME:
> +		*val = (TSL2X7X_MAX_TIMER_CNT - chip->tsl2x7x_settings.als_time)
> +			+ 1;
> +		*val2 = (*val * TSL2X7X_MIN_ITIME) % 1000;
> +		*val /= 1000;
> +		ret = IIO_VAL_INT_PLUS_MICRO;
> +		break;
>  	default:
>  		ret = -EINVAL;
>  	}
> @@ -1445,7 +1411,13 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
>  	case IIO_CHAN_INFO_CALIBBIAS:
>  		chip->tsl2x7x_settings.als_gain_trim = val;
>  		break;
> +	case IIO_CHAN_INFO_INT_TIME:
> +		chip->tsl2x7x_settings.als_time =
> +			TSL2X7X_MAX_TIMER_CNT - (val2 / 3);
Is that 3 the same one represented by MIN_ITME?

Looks like it so would be easier to review if it was using the
constant.

Thanks,

Jonathan
>  
> +		dev_info(&chip->client->dev, "%s: als time = %d",
> +			 __func__, chip->tsl2x7x_settings.als_time);
> +		break;
>  	default:
>  		return -EINVAL;
>  	}
> @@ -1459,8 +1431,6 @@ static DEVICE_ATTR_RO(in_proximity0_calibscale_available);
>  
>  static DEVICE_ATTR_RO(in_illuminance0_calibscale_available);
>  
> -static DEVICE_ATTR_RW(in_illuminance0_integration_time);
> -
>  static DEVICE_ATTR_RW(in_illuminance0_target_input);
>  
>  static DEVICE_ATTR_WO(in_illuminance0_calibrate);
> @@ -1540,7 +1510,6 @@ static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
>  
>  static struct attribute *tsl2x7x_ALS_device_attrs[] = {
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
> -	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
>  	&dev_attr_in_illuminance0_target_input.attr,
>  	&dev_attr_in_illuminance0_calibrate.attr,
> @@ -1555,7 +1524,6 @@ static struct attribute *tsl2x7x_PRX_device_attrs[] = {
>  
>  static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
> -	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
>  	&dev_attr_in_illuminance0_target_input.attr,
>  	&dev_attr_in_illuminance0_calibrate.attr,
> @@ -1572,7 +1540,6 @@ static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
>  
>  static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
> -	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
>  	&dev_attr_in_illuminance0_target_input.attr,
>  	&dev_attr_in_illuminance0_calibrate.attr,
> @@ -1710,7 +1677,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
>  			.type = IIO_LIGHT,
>  			.indexed = 1,
>  			.channel = 0,
> -			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +					      BIT(IIO_CHAN_INFO_INT_TIME),
>  			}, {
>  			.type = IIO_INTENSITY,
>  			.indexed = 1,
> @@ -1749,7 +1717,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
>  			.type = IIO_LIGHT,
>  			.indexed = 1,
>  			.channel = 0,
> -			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED)
> +			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +					      BIT(IIO_CHAN_INFO_INT_TIME),
>  			}, {
>  			.type = IIO_INTENSITY,
>  			.indexed = 1,
> @@ -1797,7 +1766,8 @@ static const struct tsl2x7x_chip_info tsl2x7x_chip_info_tbl[] = {
>  			.type = IIO_LIGHT,
>  			.indexed = 1,
>  			.channel = 0,
> -			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED),
> +			.info_mask_separate = BIT(IIO_CHAN_INFO_PROCESSED) |
> +					      BIT(IIO_CHAN_INFO_INT_TIME),
>  			}, {
>  			.type = IIO_INTENSITY,
>  			.indexed = 1,

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#1682792 — [PATCH v2 2/9] staging: iio: tsl2x7x: add device tree documentation

Add device tree documentation for the tsl2x7x IIO driver.

Signed-off-by: Brian Masney <masneyb@onstation.org>
CC: Rob Herring <robh+dt@kernel.org>
CC: Mark Rutland <mark.rutland@arm.com>
CC: devicetree@vger.kernel.org
---
 Documentation/devicetree/bindings/trivial-devices.txt | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/devicetree/bindings/trivial-devices.txt b/Documentation/devicetree/bindings/trivial-devices.txt
index 35f406d..0e6e953 100644
--- a/Documentation/devicetree/bindings/trivial-devices.txt
+++ b/Documentation/devicetree/bindings/trivial-devices.txt
@@ -21,6 +21,16 @@ adi,adt7490		+/-1C TDM Extended Temp Range I.C
 adi,adxl345		Three-Axis Digital Accelerometer
 adi,adxl346		Three-Axis Digital Accelerometer (backward-compatibility value "adi,adxl345" must be listed too)
 ams,iaq-core		AMS iAQ-Core VOC Sensor
+amstaos,tsl2571		AMS/TAOS ALS and proximity sensor
+amstaos,tsl2671		AMS/TAOS ALS and proximity sensor
+amstaos,tmd2671		AMS/TAOS ALS and proximity sensor
+amstaos,tsl2771		AMS/TAOS ALS and proximity sensor
+amstaos,tmd2771		AMS/TAOS ALS and proximity sensor
+amstaos,tsl2572		AMS/TAOS ALS and proximity sensor
+amstaos,tsl2672		AMS/TAOS ALS and proximity sensor
+amstaos,tmd2672		AMS/TAOS ALS and proximity sensor
+amstaos,tsl2772		AMS/TAOS ALS and proximity sensor
+amstaos,tmd2772		AMS/TAOS ALS and proximity sensor
 at,24c08		i2c serial eeprom  (24cxx)
 atmel,at97sc3204t	i2c trusted platform module (TPM)
 capella,cm32181		CM32181: Ambient Light Sensor
-- 
2.9.4

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#1683771 — Re: [PATCH v2 2/9] staging: iio: tsl2x7x: add device tree documentation

On Thu,  6 Jul 2017 18:56:19 -0400
Brian Masney <masneyb@onstation.org> wrote:

> Add device tree documentation for the tsl2x7x IIO driver.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> CC: Rob Herring <robh+dt@kernel.org>
> CC: Mark Rutland <mark.rutland@arm.com>
> CC: devicetree@vger.kernel.org
For what it's worth given the simplicity of the patch

Acked-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

> ---
>  Documentation/devicetree/bindings/trivial-devices.txt | 10 ++++++++++
>  1 file changed, 10 insertions(+)
> 
> diff --git a/Documentation/devicetree/bindings/trivial-devices.txt b/Documentation/devicetree/bindings/trivial-devices.txt
> index 35f406d..0e6e953 100644
> --- a/Documentation/devicetree/bindings/trivial-devices.txt
> +++ b/Documentation/devicetree/bindings/trivial-devices.txt
> @@ -21,6 +21,16 @@ adi,adt7490		+/-1C TDM Extended Temp Range I.C
>  adi,adxl345		Three-Axis Digital Accelerometer
>  adi,adxl346		Three-Axis Digital Accelerometer (backward-compatibility value "adi,adxl345" must be listed too)
>  ams,iaq-core		AMS iAQ-Core VOC Sensor
> +amstaos,tsl2571		AMS/TAOS ALS and proximity sensor
> +amstaos,tsl2671		AMS/TAOS ALS and proximity sensor
> +amstaos,tmd2671		AMS/TAOS ALS and proximity sensor
> +amstaos,tsl2771		AMS/TAOS ALS and proximity sensor
> +amstaos,tmd2771		AMS/TAOS ALS and proximity sensor
> +amstaos,tsl2572		AMS/TAOS ALS and proximity sensor
> +amstaos,tsl2672		AMS/TAOS ALS and proximity sensor
> +amstaos,tmd2672		AMS/TAOS ALS and proximity sensor
> +amstaos,tsl2772		AMS/TAOS ALS and proximity sensor
> +amstaos,tmd2772		AMS/TAOS ALS and proximity sensor
>  at,24c08		i2c serial eeprom  (24cxx)
>  atmel,at97sc3204t	i2c trusted platform module (TPM)
>  capella,cm32181		CM32181: Ambient Light Sensor

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#1684280 — Re: [PATCH v2 2/9] staging: iio: tsl2x7x: add device tree documentation

On Thu, Jul 06, 2017 at 06:56:19PM -0400, Brian Masney wrote:
> Add device tree documentation for the tsl2x7x IIO driver.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
> CC: Rob Herring <robh+dt@kernel.org>
> CC: Mark Rutland <mark.rutland@arm.com>
> CC: devicetree@vger.kernel.org
> ---
>  Documentation/devicetree/bindings/trivial-devices.txt | 10 ++++++++++
>  1 file changed, 10 insertions(+)

Applied.

Rob

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#1682793 — [PATCH v2 4/9] staging: iio: tsl2x7x: remove tsl2x7x_i2c_read()

tsl2x7x_i2c_read() would call i2c_smbus_write_byte() and
i2c_smbus_read_byte(). These two i2c functions can be replaced with a
single call to i2c_smbus_read_byte_data(). This patch removes the
tsl2x7x_i2c_read() function and replaces all occurrences with a call to
i2c_smbus_read_byte_data().

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/staging/iio/light/tsl2x7x.c | 71 ++++++++++++-------------------------
 1 file changed, 22 insertions(+), 49 deletions(-)

diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
index 95ed7cc6..6c9f06b 100644
--- a/drivers/staging/iio/light/tsl2x7x.c
+++ b/drivers/staging/iio/light/tsl2x7x.c
@@ -285,35 +285,6 @@ static const u8 device_channel_config[] = {
 };
 
 /**
- * tsl2x7x_i2c_read() - Read a byte from a register.
- * @client:	i2c client
- * @reg:	device register to read from
- * @*val:	pointer to location to store register contents.
- *
- */
-static int
-tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
-{
-	int ret;
-
-	/* select register to write */
-	ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
-	if (ret < 0) {
-		dev_err(&client->dev, "failed to write register %x\n", reg);
-		return ret;
-	}
-
-	/* read the data */
-	ret = i2c_smbus_read_byte(client);
-	if (ret >= 0)
-		*val = (u8)ret;
-	else
-		dev_err(&client->dev, "failed to read register %x\n", reg);
-
-	return ret;
-}
-
-/**
  * tsl2x7x_get_lux() - Reads and calculates current lux value.
  * @indio_dev:	pointer to IIO device
  *
@@ -352,15 +323,15 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
 		goto out_unlock;
 	}
 
-	ret = tsl2x7x_i2c_read(chip->client,
-			       (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
+	ret = i2c_smbus_read_byte_data(chip->client,
+				       TSL2X7X_CMD_REG | TSL2X7X_STATUS);
 	if (ret < 0) {
 		dev_err(&chip->client->dev,
 			"%s: Failed to read STATUS Reg\n", __func__);
 		goto out_unlock;
 	}
 	/* is data new & valid */
-	if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
+	if (!(ret & TSL2X7X_STA_ADC_VALID)) {
 		dev_err(&chip->client->dev,
 			"%s: data not valid yet\n", __func__);
 		ret = chip->als_cur_info.lux; /* return LAST VALUE */
@@ -368,14 +339,16 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
 	}
 
 	for (i = 0; i < 4; i++) {
-		ret = tsl2x7x_i2c_read(chip->client,
-				       (TSL2X7X_CMD_REG |
-				       (TSL2X7X_ALS_CHAN0LO + i)), &buf[i]);
+		int reg = TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i);
+
+		ret = i2c_smbus_read_byte_data(chip->client, reg);
 		if (ret < 0) {
 			dev_err(&chip->client->dev,
 				"failed to read. err=%x\n", ret);
 			goto out_unlock;
 		}
+
+		buf[i] = ret;
 	}
 
 	/* clear any existing interrupt status */
@@ -475,7 +448,6 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
 {
 	int i;
 	int ret;
-	u8 status;
 	u8 chdata[2];
 	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
 
@@ -485,8 +457,8 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
 		return -EBUSY;
 	}
 
-	ret = tsl2x7x_i2c_read(chip->client,
-			       (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
+	ret = i2c_smbus_read_byte_data(chip->client,
+				       TSL2X7X_CMD_REG | TSL2X7X_STATUS);
 	if (ret < 0) {
 		dev_err(&chip->client->dev, "i2c err=%d\n", ret);
 		goto prox_poll_err;
@@ -498,7 +470,7 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
 	case tmd2671:
 	case tsl2771:
 	case tmd2771:
-		if (!(status & TSL2X7X_STA_ADC_VALID))
+		if (!(ret & TSL2X7X_STA_ADC_VALID))
 			goto prox_poll_err;
 	break;
 	case tsl2572:
@@ -506,17 +478,19 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
 	case tmd2672:
 	case tsl2772:
 	case tmd2772:
-		if (!(status & TSL2X7X_STA_PRX_VALID))
+		if (!(ret & TSL2X7X_STA_PRX_VALID))
 			goto prox_poll_err;
 	break;
 	}
 
 	for (i = 0; i < 2; i++) {
-		ret = tsl2x7x_i2c_read(chip->client,
-				       (TSL2X7X_CMD_REG |
-				       (TSL2X7X_PRX_LO + i)), &chdata[i]);
+		int reg = TSL2X7X_CMD_REG | (TSL2X7X_PRX_LO + i);
+
+		ret = i2c_smbus_read_byte_data(chip->client, reg);
 		if (ret < 0)
 			goto prox_poll_err;
+
+		chdata[i] = ret;
 	}
 
 	chip->prox_data =
@@ -1486,7 +1460,7 @@ static DEVICE_ATTR_RW(in_intensity0_thresh_period);
 static DEVICE_ATTR_RW(in_proximity0_thresh_period);
 
 /* Use the default register values to identify the Taos device */
-static int tsl2x7x_device_id(unsigned char *id, int target)
+static int tsl2x7x_device_id(int *id, int target)
 {
 	switch (target) {
 	case tsl2571:
@@ -1843,7 +1817,6 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
 			 const struct i2c_device_id *id)
 {
 	int ret;
-	unsigned char device_id;
 	struct iio_dev *indio_dev;
 	struct tsl2X7X_chip *chip;
 
@@ -1855,13 +1828,13 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
 	chip->client = clientp;
 	i2c_set_clientdata(clientp, indio_dev);
 
-	ret = tsl2x7x_i2c_read(chip->client,
-			       TSL2X7X_CHIPID, &device_id);
+	ret = i2c_smbus_read_byte_data(chip->client,
+				       TSL2X7X_CMD_REG | TSL2X7X_CHIPID);
 	if (ret < 0)
 		return ret;
 
-	if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
-	    (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
+	if ((!tsl2x7x_device_id(&ret, id->driver_data)) ||
+	    (tsl2x7x_device_id(&ret, id->driver_data) == -EINVAL)) {
 		dev_info(&chip->client->dev,
 			 "%s: i2c device found does not match expected id\n",
 				__func__);
-- 
2.9.4

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#1683774 — Re: [PATCH v2 4/9] staging: iio: tsl2x7x: remove tsl2x7x_i2c_read()

On Thu,  6 Jul 2017 18:56:21 -0400
Brian Masney <masneyb@onstation.org> wrote:

> tsl2x7x_i2c_read() would call i2c_smbus_write_byte() and
> i2c_smbus_read_byte(). These two i2c functions can be replaced with a
> single call to i2c_smbus_read_byte_data(). This patch removes the
> tsl2x7x_i2c_read() function and replaces all occurrences with a call to
> i2c_smbus_read_byte_data().
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
Applied.
> ---
>  drivers/staging/iio/light/tsl2x7x.c | 71 ++++++++++++-------------------------
>  1 file changed, 22 insertions(+), 49 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
> index 95ed7cc6..6c9f06b 100644
> --- a/drivers/staging/iio/light/tsl2x7x.c
> +++ b/drivers/staging/iio/light/tsl2x7x.c
> @@ -285,35 +285,6 @@ static const u8 device_channel_config[] = {
>  };
>  
>  /**
> - * tsl2x7x_i2c_read() - Read a byte from a register.
> - * @client:	i2c client
> - * @reg:	device register to read from
> - * @*val:	pointer to location to store register contents.
> - *
> - */
> -static int
> -tsl2x7x_i2c_read(struct i2c_client *client, u8 reg, u8 *val)
> -{
> -	int ret;
> -
> -	/* select register to write */
> -	ret = i2c_smbus_write_byte(client, (TSL2X7X_CMD_REG | reg));
> -	if (ret < 0) {
> -		dev_err(&client->dev, "failed to write register %x\n", reg);
> -		return ret;
> -	}
> -
> -	/* read the data */
> -	ret = i2c_smbus_read_byte(client);
> -	if (ret >= 0)
> -		*val = (u8)ret;
> -	else
> -		dev_err(&client->dev, "failed to read register %x\n", reg);
> -
> -	return ret;
> -}
> -
> -/**
>   * tsl2x7x_get_lux() - Reads and calculates current lux value.
>   * @indio_dev:	pointer to IIO device
>   *
> @@ -352,15 +323,15 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
>  		goto out_unlock;
>  	}
>  
> -	ret = tsl2x7x_i2c_read(chip->client,
> -			       (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &buf[0]);
> +	ret = i2c_smbus_read_byte_data(chip->client,
> +				       TSL2X7X_CMD_REG | TSL2X7X_STATUS);
>  	if (ret < 0) {
>  		dev_err(&chip->client->dev,
>  			"%s: Failed to read STATUS Reg\n", __func__);
>  		goto out_unlock;
>  	}
>  	/* is data new & valid */
> -	if (!(buf[0] & TSL2X7X_STA_ADC_VALID)) {
> +	if (!(ret & TSL2X7X_STA_ADC_VALID)) {
>  		dev_err(&chip->client->dev,
>  			"%s: data not valid yet\n", __func__);
>  		ret = chip->als_cur_info.lux; /* return LAST VALUE */
> @@ -368,14 +339,16 @@ static int tsl2x7x_get_lux(struct iio_dev *indio_dev)
>  	}
>  
>  	for (i = 0; i < 4; i++) {
> -		ret = tsl2x7x_i2c_read(chip->client,
> -				       (TSL2X7X_CMD_REG |
> -				       (TSL2X7X_ALS_CHAN0LO + i)), &buf[i]);
> +		int reg = TSL2X7X_CMD_REG | (TSL2X7X_ALS_CHAN0LO + i);
> +
> +		ret = i2c_smbus_read_byte_data(chip->client, reg);
>  		if (ret < 0) {
>  			dev_err(&chip->client->dev,
>  				"failed to read. err=%x\n", ret);
>  			goto out_unlock;
>  		}
> +
> +		buf[i] = ret;
>  	}
>  
>  	/* clear any existing interrupt status */
> @@ -475,7 +448,6 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
>  {
>  	int i;
>  	int ret;
> -	u8 status;
>  	u8 chdata[2];
>  	struct tsl2X7X_chip *chip = iio_priv(indio_dev);
>  
> @@ -485,8 +457,8 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
>  		return -EBUSY;
>  	}
>  
> -	ret = tsl2x7x_i2c_read(chip->client,
> -			       (TSL2X7X_CMD_REG | TSL2X7X_STATUS), &status);
> +	ret = i2c_smbus_read_byte_data(chip->client,
> +				       TSL2X7X_CMD_REG | TSL2X7X_STATUS);
>  	if (ret < 0) {
>  		dev_err(&chip->client->dev, "i2c err=%d\n", ret);
>  		goto prox_poll_err;
> @@ -498,7 +470,7 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
>  	case tmd2671:
>  	case tsl2771:
>  	case tmd2771:
> -		if (!(status & TSL2X7X_STA_ADC_VALID))
> +		if (!(ret & TSL2X7X_STA_ADC_VALID))
>  			goto prox_poll_err;
>  	break;
>  	case tsl2572:
> @@ -506,17 +478,19 @@ static int tsl2x7x_get_prox(struct iio_dev *indio_dev)
>  	case tmd2672:
>  	case tsl2772:
>  	case tmd2772:
> -		if (!(status & TSL2X7X_STA_PRX_VALID))
> +		if (!(ret & TSL2X7X_STA_PRX_VALID))
>  			goto prox_poll_err;
>  	break;
>  	}
>  
>  	for (i = 0; i < 2; i++) {
> -		ret = tsl2x7x_i2c_read(chip->client,
> -				       (TSL2X7X_CMD_REG |
> -				       (TSL2X7X_PRX_LO + i)), &chdata[i]);
> +		int reg = TSL2X7X_CMD_REG | (TSL2X7X_PRX_LO + i);
> +
> +		ret = i2c_smbus_read_byte_data(chip->client, reg);
>  		if (ret < 0)
>  			goto prox_poll_err;
> +
> +		chdata[i] = ret;
>  	}
>  
>  	chip->prox_data =
> @@ -1486,7 +1460,7 @@ static DEVICE_ATTR_RW(in_intensity0_thresh_period);
>  static DEVICE_ATTR_RW(in_proximity0_thresh_period);
>  
>  /* Use the default register values to identify the Taos device */
> -static int tsl2x7x_device_id(unsigned char *id, int target)
> +static int tsl2x7x_device_id(int *id, int target)
>  {
>  	switch (target) {
>  	case tsl2571:
> @@ -1843,7 +1817,6 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
>  			 const struct i2c_device_id *id)
>  {
>  	int ret;
> -	unsigned char device_id;
>  	struct iio_dev *indio_dev;
>  	struct tsl2X7X_chip *chip;
>  
> @@ -1855,13 +1828,13 @@ static int tsl2x7x_probe(struct i2c_client *clientp,
>  	chip->client = clientp;
>  	i2c_set_clientdata(clientp, indio_dev);
>  
> -	ret = tsl2x7x_i2c_read(chip->client,
> -			       TSL2X7X_CHIPID, &device_id);
> +	ret = i2c_smbus_read_byte_data(chip->client,
> +				       TSL2X7X_CMD_REG | TSL2X7X_CHIPID);
>  	if (ret < 0)
>  		return ret;
>  
> -	if ((!tsl2x7x_device_id(&device_id, id->driver_data)) ||
> -	    (tsl2x7x_device_id(&device_id, id->driver_data) == -EINVAL)) {
> +	if ((!tsl2x7x_device_id(&ret, id->driver_data)) ||
> +	    (tsl2x7x_device_id(&ret, id->driver_data) == -EINVAL)) {
>  		dev_info(&chip->client->dev,
>  			 "%s: i2c device found does not match expected id\n",
>  				__func__);

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#1682794 — [PATCH v2 3/9] staging: iio: tsl2x7x: remove redundant power_state sysfs attribute

The TSL2X7X driver has a custom power_state sysfs attribute. Remove this
attribute since the runtime power management code provides a sysfs
attribute to control the power state of the device.

Signed-off-by: Brian Masney <masneyb@onstation.org>
---
 drivers/staging/iio/light/tsl2x7x.c | 34 ----------------------------------
 1 file changed, 34 deletions(-)

diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
index 8148986..95ed7cc6 100644
--- a/drivers/staging/iio/light/tsl2x7x.c
+++ b/drivers/staging/iio/light/tsl2x7x.c
@@ -915,33 +915,6 @@ static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
 		tsl2x7x_chip_on(indio_dev);
 }
 
-static ssize_t power_state_show(struct device *dev,
-					struct device_attribute *attr,
-					char *buf)
-{
-	struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
-
-	return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
-}
-
-static ssize_t power_state_store(struct device *dev,
-					 struct device_attribute *attr,
-					 const char *buf, size_t len)
-{
-	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
-	bool value;
-
-	if (strtobool(buf, &value))
-		return -EINVAL;
-
-	if (value)
-		tsl2x7x_chip_on(indio_dev);
-	else
-		tsl2x7x_chip_off(indio_dev);
-
-	return len;
-}
-
 static ssize_t in_illuminance0_calibscale_available_show(struct device *dev,
 					   struct device_attribute *attr,
 					   char *buf)
@@ -1494,8 +1467,6 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
 	return 0;
 }
 
-static DEVICE_ATTR_RW(power_state);
-
 static DEVICE_ATTR_RO(in_proximity0_calibscale_available);
 
 static DEVICE_ATTR_RO(in_illuminance0_calibscale_available);
@@ -1580,7 +1551,6 @@ static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
 }
 
 static struct attribute *tsl2x7x_ALS_device_attrs[] = {
-	&dev_attr_power_state.attr,
 	&dev_attr_in_illuminance0_calibscale_available.attr,
 	&dev_attr_in_illuminance0_integration_time.attr,
 	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
@@ -1591,13 +1561,11 @@ static struct attribute *tsl2x7x_ALS_device_attrs[] = {
 };
 
 static struct attribute *tsl2x7x_PRX_device_attrs[] = {
-	&dev_attr_power_state.attr,
 	&dev_attr_in_proximity0_calibrate.attr,
 	NULL
 };
 
 static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
-	&dev_attr_power_state.attr,
 	&dev_attr_in_illuminance0_calibscale_available.attr,
 	&dev_attr_in_illuminance0_integration_time.attr,
 	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
@@ -1609,14 +1577,12 @@ static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
 };
 
 static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
-	&dev_attr_power_state.attr,
 	&dev_attr_in_proximity0_calibrate.attr,
 	&dev_attr_in_proximity0_calibscale_available.attr,
 	NULL
 };
 
 static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
-	&dev_attr_power_state.attr,
 	&dev_attr_in_illuminance0_calibscale_available.attr,
 	&dev_attr_in_illuminance0_integration_time.attr,
 	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
-- 
2.9.4

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#1683772 — Re: [PATCH v2 3/9] staging: iio: tsl2x7x: remove redundant power_state sysfs attribute

On Thu,  6 Jul 2017 18:56:20 -0400
Brian Masney <masneyb@onstation.org> wrote:

> The TSL2X7X driver has a custom power_state sysfs attribute. Remove this
> attribute since the runtime power management code provides a sysfs
> attribute to control the power state of the device.
> 
> Signed-off-by: Brian Masney <masneyb@onstation.org>
Applied.
> ---
>  drivers/staging/iio/light/tsl2x7x.c | 34 ----------------------------------
>  1 file changed, 34 deletions(-)
> 
> diff --git a/drivers/staging/iio/light/tsl2x7x.c b/drivers/staging/iio/light/tsl2x7x.c
> index 8148986..95ed7cc6 100644
> --- a/drivers/staging/iio/light/tsl2x7x.c
> +++ b/drivers/staging/iio/light/tsl2x7x.c
> @@ -915,33 +915,6 @@ static void tsl2x7x_prox_cal(struct iio_dev *indio_dev)
>  		tsl2x7x_chip_on(indio_dev);
>  }
>  
> -static ssize_t power_state_show(struct device *dev,
> -					struct device_attribute *attr,
> -					char *buf)
> -{
> -	struct tsl2X7X_chip *chip = iio_priv(dev_to_iio_dev(dev));
> -
> -	return snprintf(buf, PAGE_SIZE, "%d\n", chip->tsl2x7x_chip_status);
> -}
> -
> -static ssize_t power_state_store(struct device *dev,
> -					 struct device_attribute *attr,
> -					 const char *buf, size_t len)
> -{
> -	struct iio_dev *indio_dev = dev_to_iio_dev(dev);
> -	bool value;
> -
> -	if (strtobool(buf, &value))
> -		return -EINVAL;
> -
> -	if (value)
> -		tsl2x7x_chip_on(indio_dev);
> -	else
> -		tsl2x7x_chip_off(indio_dev);
> -
> -	return len;
> -}
> -
>  static ssize_t in_illuminance0_calibscale_available_show(struct device *dev,
>  					   struct device_attribute *attr,
>  					   char *buf)
> @@ -1494,8 +1467,6 @@ static int tsl2x7x_write_raw(struct iio_dev *indio_dev,
>  	return 0;
>  }
>  
> -static DEVICE_ATTR_RW(power_state);
> -
>  static DEVICE_ATTR_RO(in_proximity0_calibscale_available);
>  
>  static DEVICE_ATTR_RO(in_illuminance0_calibscale_available);
> @@ -1580,7 +1551,6 @@ static irqreturn_t tsl2x7x_event_handler(int irq, void *private)
>  }
>  
>  static struct attribute *tsl2x7x_ALS_device_attrs[] = {
> -	&dev_attr_power_state.attr,
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
>  	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
> @@ -1591,13 +1561,11 @@ static struct attribute *tsl2x7x_ALS_device_attrs[] = {
>  };
>  
>  static struct attribute *tsl2x7x_PRX_device_attrs[] = {
> -	&dev_attr_power_state.attr,
>  	&dev_attr_in_proximity0_calibrate.attr,
>  	NULL
>  };
>  
>  static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
> -	&dev_attr_power_state.attr,
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
>  	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,
> @@ -1609,14 +1577,12 @@ static struct attribute *tsl2x7x_ALSPRX_device_attrs[] = {
>  };
>  
>  static struct attribute *tsl2x7x_PRX2_device_attrs[] = {
> -	&dev_attr_power_state.attr,
>  	&dev_attr_in_proximity0_calibrate.attr,
>  	&dev_attr_in_proximity0_calibscale_available.attr,
>  	NULL
>  };
>  
>  static struct attribute *tsl2x7x_ALSPRX2_device_attrs[] = {
> -	&dev_attr_power_state.attr,
>  	&dev_attr_in_illuminance0_calibscale_available.attr,
>  	&dev_attr_in_illuminance0_integration_time.attr,
>  	&iio_const_attr_in_illuminance0_integration_time_available.dev_attr.attr,

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