[V6,7/7] iio: adc: Add a common read function for PMIC5 and PMIC7
diff mbox series

Message ID 1590684869-15400-8-git-send-email-jprakash@codeaurora.org
State New
Headers show
Series
  • [V6,1/7] iio: adc: Convert the QCOM SPMI ADC bindings to .yaml format
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Commit Message

Jishnu Prakash May 28, 2020, 4:54 p.m. UTC
Add a common function used for read_raw callback for both PMIC5
and PMIC7 ADCs.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
---
 drivers/iio/adc/qcom-spmi-adc5.c | 53 +++++++++++++++++++---------------------
 1 file changed, 25 insertions(+), 28 deletions(-)

Comments

Jonathan Cameron May 31, 2020, 10:52 a.m. UTC | #1
On Thu, 28 May 2020 22:24:29 +0530
Jishnu Prakash <jprakash@codeaurora.org> wrote:

> Add a common function used for read_raw callback for both PMIC5
> and PMIC7 ADCs.
> 
> Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>

Hmm. I'm not completely sold on this one.   Suggestions below.

Jonathan


> ---
>  drivers/iio/adc/qcom-spmi-adc5.c | 53 +++++++++++++++++++---------------------
>  1 file changed, 25 insertions(+), 28 deletions(-)
> 
> diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
> index 0f9af66..fe49741 100644
> --- a/drivers/iio/adc/qcom-spmi-adc5.c
> +++ b/drivers/iio/adc/qcom-spmi-adc5.c
> @@ -449,6 +449,13 @@ static int adc7_do_conversion(struct adc5_chip *adc,
>  	return ret;
>  }
>  
> +struct adc_do_conversion {
> +	int (*adc_do_conversion)(struct adc5_chip *adc,
> +			struct adc5_channel_prop *prop,
> +			struct iio_chan_spec const *chan,
> +			u16 *data_volt, u16 *data_cur);

Why use a structure for this? It's just a function pointer.
If they form is too long you can always use a typedef.

This is fine if you have other stuff coming shortly that will add
to this structure but for now it's just a bit confusing.

Directly passing the function pointer will reduce the amount
of coded added here and make the argument in favour of refactoring
rather stronger.


> +};
> +
>  static irqreturn_t adc5_isr(int irq, void *dev_id)
>  {
>  	struct adc5_chip *adc = dev_id;
> @@ -487,9 +494,9 @@ static int adc7_of_xlate(struct iio_dev *indio_dev,
>  	return -EINVAL;
>  }
>  
> -static int adc5_read_raw(struct iio_dev *indio_dev,
> +static int adc_read_raw_common(struct iio_dev *indio_dev,
>  			 struct iio_chan_spec const *chan, int *val, int *val2,
> -			 long mask)
> +			 long mask, struct adc_do_conversion do_conv)
>  {
>  	struct adc5_chip *adc = iio_priv(indio_dev);
>  	struct adc5_channel_prop *prop;
> @@ -500,8 +507,8 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
>  
>  	switch (mask) {
>  	case IIO_CHAN_INFO_PROCESSED:
> -		ret = adc5_do_conversion(adc, prop, chan,
> -				&adc_code_volt, &adc_code_cur);
> +		ret = do_conv.adc_do_conversion(adc, prop, chan,
> +					&adc_code_volt, &adc_code_cur);
>  		if (ret)
>  			return ret;
>  
> @@ -518,36 +525,26 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
>  	}
>  }
>  
> -static int adc7_read_raw(struct iio_dev *indio_dev,
> +static int adc5_read_raw(struct iio_dev *indio_dev,
>  			 struct iio_chan_spec const *chan, int *val, int *val2,
>  			 long mask)
>  {
> -	struct adc5_chip *adc = iio_priv(indio_dev);
> -	struct adc5_channel_prop *prop;
> -	u16 adc_code_volt, adc_code_cur;
> -	int ret;
> -
> -	prop = &adc->chan_props[chan->address];
> -
> -	switch (mask) {
> -	case IIO_CHAN_INFO_PROCESSED:
> -		ret = adc7_do_conversion(adc, prop, chan,
> -					&adc_code_volt, &adc_code_cur);
> -		if (ret)
> -			return ret;
> +	struct adc_do_conversion do_conv;
>  
> -		ret = qcom_adc5_hw_scale(prop->scale_fn_type,
> -			&adc5_prescale_ratios[prop->prescale],
> -			adc->data,
> -			adc_code_volt, val);
> +	do_conv.adc_do_conversion = adc5_do_conversion;
> +	return adc_read_raw_common(indio_dev, chan, val, val2,
> +				mask, do_conv);
> +}
>  
> -		if (ret)
> -			return ret;
> +static int adc7_read_raw(struct iio_dev *indio_dev,
> +			 struct iio_chan_spec const *chan, int *val, int *val2,
> +			 long mask)
> +{
> +	struct adc_do_conversion do_conv;
>  
> -		return IIO_VAL_INT;
> -	default:
> -		return -EINVAL;
> -	}
> +	do_conv.adc_do_conversion = adc7_do_conversion;
> +	return adc_read_raw_common(indio_dev, chan, val, val2,
> +				mask, do_conv);
>  }
>  
>  static const struct iio_info adc5_info = {

Patch
diff mbox series

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 0f9af66..fe49741 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -449,6 +449,13 @@  static int adc7_do_conversion(struct adc5_chip *adc,
 	return ret;
 }
 
+struct adc_do_conversion {
+	int (*adc_do_conversion)(struct adc5_chip *adc,
+			struct adc5_channel_prop *prop,
+			struct iio_chan_spec const *chan,
+			u16 *data_volt, u16 *data_cur);
+};
+
 static irqreturn_t adc5_isr(int irq, void *dev_id)
 {
 	struct adc5_chip *adc = dev_id;
@@ -487,9 +494,9 @@  static int adc7_of_xlate(struct iio_dev *indio_dev,
 	return -EINVAL;
 }
 
-static int adc5_read_raw(struct iio_dev *indio_dev,
+static int adc_read_raw_common(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
-			 long mask)
+			 long mask, struct adc_do_conversion do_conv)
 {
 	struct adc5_chip *adc = iio_priv(indio_dev);
 	struct adc5_channel_prop *prop;
@@ -500,8 +507,8 @@  static int adc5_read_raw(struct iio_dev *indio_dev,
 
 	switch (mask) {
 	case IIO_CHAN_INFO_PROCESSED:
-		ret = adc5_do_conversion(adc, prop, chan,
-				&adc_code_volt, &adc_code_cur);
+		ret = do_conv.adc_do_conversion(adc, prop, chan,
+					&adc_code_volt, &adc_code_cur);
 		if (ret)
 			return ret;
 
@@ -518,36 +525,26 @@  static int adc5_read_raw(struct iio_dev *indio_dev,
 	}
 }
 
-static int adc7_read_raw(struct iio_dev *indio_dev,
+static int adc5_read_raw(struct iio_dev *indio_dev,
 			 struct iio_chan_spec const *chan, int *val, int *val2,
 			 long mask)
 {
-	struct adc5_chip *adc = iio_priv(indio_dev);
-	struct adc5_channel_prop *prop;
-	u16 adc_code_volt, adc_code_cur;
-	int ret;
-
-	prop = &adc->chan_props[chan->address];
-
-	switch (mask) {
-	case IIO_CHAN_INFO_PROCESSED:
-		ret = adc7_do_conversion(adc, prop, chan,
-					&adc_code_volt, &adc_code_cur);
-		if (ret)
-			return ret;
+	struct adc_do_conversion do_conv;
 
-		ret = qcom_adc5_hw_scale(prop->scale_fn_type,
-			&adc5_prescale_ratios[prop->prescale],
-			adc->data,
-			adc_code_volt, val);
+	do_conv.adc_do_conversion = adc5_do_conversion;
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, do_conv);
+}
 
-		if (ret)
-			return ret;
+static int adc7_read_raw(struct iio_dev *indio_dev,
+			 struct iio_chan_spec const *chan, int *val, int *val2,
+			 long mask)
+{
+	struct adc_do_conversion do_conv;
 
-		return IIO_VAL_INT;
-	default:
-		return -EINVAL;
-	}
+	do_conv.adc_do_conversion = adc7_do_conversion;
+	return adc_read_raw_common(indio_dev, chan, val, val2,
+				mask, do_conv);
 }
 
 static const struct iio_info adc5_info = {