iio: adc: qcom-vadc: move several adc5 functions to common file

ADC-TM5 driver will make use of several functions from ADC5 driver. Move
them to qcom-vadc-common driver.

Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>

3 files changed, 85 insertions, 69 deletions

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 21fdcde77883..10ca0bf77160 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -143,18 +143,6 @@ struct adc5_chip {
 	const struct adc5_data	*data;
 };
 
-static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
-	{.num =  1, .den =  1},
-	{.num =  1, .den =  3},
-	{.num =  1, .den =  4},
-	{.num =  1, .den =  6},
-	{.num =  1, .den = 20},
-	{.num =  1, .den =  8},
-	{.num = 10, .den = 81},
-	{.num =  1, .den = 10},
-	{.num =  1, .den = 16}
-};
-
 static int adc5_read(struct adc5_chip *adc, u16 offset, u8 *data, int len)
 {
 	return regmap_bulk_read(adc->regmap, adc->base + offset, data, len);
@@ -165,55 +153,6 @@ static int adc5_write(struct adc5_chip *adc, u16 offset, u8 *data, int len)
 	return regmap_bulk_write(adc->regmap, adc->base + offset, data, len);
 }
 
-static int adc5_prescaling_from_dt(u32 num, u32 den)
-{
-	unsigned int pre;
-
-	for (pre = 0; pre < ARRAY_SIZE(adc5_prescale_ratios); pre++)
-		if (adc5_prescale_ratios[pre].num == num &&
-		    adc5_prescale_ratios[pre].den == den)
-			break;
-
-	if (pre == ARRAY_SIZE(adc5_prescale_ratios))
-		return -EINVAL;
-
-	return pre;
-}
-
-static int adc5_hw_settle_time_from_dt(u32 value,
-					const unsigned int *hw_settle)
-{
-	unsigned int i;
-
-	for (i = 0; i < VADC_HW_SETTLE_SAMPLES_MAX; i++) {
-		if (value == hw_settle[i])
-			return i;
-	}
-
-	return -EINVAL;
-}
-
-static int adc5_avg_samples_from_dt(u32 value)
-{
-	if (!is_power_of_2(value) || value > ADC5_AVG_SAMPLES_MAX)
-		return -EINVAL;
-
-	return __ffs(value);
-}
-
-static int adc5_decimation_from_dt(u32 value,
-					const unsigned int *decimation)
-{
-	unsigned int i;
-
-	for (i = 0; i < ADC5_DECIMATION_SAMPLES_MAX; i++) {
-		if (value == decimation[i])
-			return i;
-	}
-
-	return -EINVAL;
-}
-
 static int adc5_read_voltage_data(struct adc5_chip *adc, u16 *data)
 {
 	int ret;
@@ -396,7 +335,7 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
 			return ret;
 
 		ret = qcom_adc5_hw_scale(prop->scale_fn_type,
-			&adc5_prescale_ratios[prop->prescale],
+			prop->prescale,
 			adc->data,
 			adc_code_volt, val);
 		if (ret)
@@ -539,7 +478,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 	ret = of_property_read_u32(node, "qcom,decimation", &value);
 	if (!ret) {
-		ret = adc5_decimation_from_dt(value, data->decimation);
+		ret = qcom_adc5_decimation_from_dt(value, data->decimation);
 		if (ret < 0) {
 			dev_err(dev, "%02x invalid decimation %d\n",
 				chan, value);
@@ -552,7 +491,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 	ret = of_property_read_u32_array(node, "qcom,pre-scaling", varr, 2);
 	if (!ret) {
-		ret = adc5_prescaling_from_dt(varr[0], varr[1]);
+		ret = qcom_adc5_prescaling_from_dt(varr[0], varr[1]);
 		if (ret < 0) {
 			dev_err(dev, "%02x invalid pre-scaling <%d %d>\n",
 				chan, varr[0], varr[1]);
@@ -580,10 +519,10 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 		/* Digital controller >= 5.3 have hw_settle_2 option */
 		if (dig_version[0] >= ADC5_HW_SETTLE_DIFF_MINOR &&
 			dig_version[1] >= ADC5_HW_SETTLE_DIFF_MAJOR)
-			ret = adc5_hw_settle_time_from_dt(value,
+			ret = qcom_adc5_hw_settle_time_from_dt(value,
 							data->hw_settle_2);
 		else
-			ret = adc5_hw_settle_time_from_dt(value,
+			ret = qcom_adc5_hw_settle_time_from_dt(value,
 							data->hw_settle_1);
 
 		if (ret < 0) {
@@ -598,7 +537,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,
 
 	ret = of_property_read_u32(node, "qcom,avg-samples", &value);
 	if (!ret) {
-		ret = adc5_avg_samples_from_dt(value);
+		ret = qcom_adc5_avg_samples_from_dt(value);
 		if (ret < 0) {
 			dev_err(dev, "%02x invalid avg-samples %d\n",
 				chan, value);
diff --git a/drivers/iio/adc/qcom-vadc-common.c b/drivers/iio/adc/qcom-vadc-common.c
index 2bb78d1c4daa..ffa578ce76db 100644
--- a/drivers/iio/adc/qcom-vadc-common.c
+++ b/drivers/iio/adc/qcom-vadc-common.c
@@ -89,6 +89,18 @@ static const struct vadc_map_pt adcmap_100k_104ef_104fb_1875_vref[] = {
 	{ 46,	125000 },
 };
 
+static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
+	{.num =  1, .den =  1},
+	{.num =  1, .den =  3},
+	{.num =  1, .den =  4},
+	{.num =  1, .den =  6},
+	{.num =  1, .den = 20},
+	{.num =  1, .den =  8},
+	{.num = 10, .den = 81},
+	{.num =  1, .den = 10},
+	{.num =  1, .den = 16}
+};
+
 static int qcom_vadc_scale_hw_calib_volt(
 				const struct vadc_prescale_ratio *prescale,
 				const struct adc5_data *data,
@@ -385,10 +397,12 @@ int qcom_vadc_scale(enum vadc_scale_fn_type scaletype,
 EXPORT_SYMBOL(qcom_vadc_scale);
 
 int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
-		    const struct vadc_prescale_ratio *prescale,
+		    unsigned int prescale_ratio,
 		    const struct adc5_data *data,
 		    u16 adc_code, int *result)
 {
+	const struct vadc_prescale_ratio *prescale = &adc5_prescale_ratios[prescale_ratio];
+
 	if (!(scaletype >= SCALE_HW_CALIB_DEFAULT &&
 		scaletype < SCALE_HW_CALIB_INVALID)) {
 		pr_err("Invalid scale type %d\n", scaletype);
@@ -400,6 +414,59 @@ int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
 }
 EXPORT_SYMBOL(qcom_adc5_hw_scale);
 
+int qcom_adc5_prescaling_from_dt(u32 num, u32 den)
+{
+	unsigned int pre;
+
+	for (pre = 0; pre < ARRAY_SIZE(adc5_prescale_ratios); pre++)
+		if (adc5_prescale_ratios[pre].num == num &&
+		    adc5_prescale_ratios[pre].den == den)
+			break;
+
+	if (pre == ARRAY_SIZE(adc5_prescale_ratios))
+		return -EINVAL;
+
+	return pre;
+}
+EXPORT_SYMBOL(qcom_adc5_prescaling_from_dt);
+
+int qcom_adc5_hw_settle_time_from_dt(u32 value,
+				     const unsigned int *hw_settle)
+{
+	unsigned int i;
+
+	for (i = 0; i < VADC_HW_SETTLE_SAMPLES_MAX; i++) {
+		if (value == hw_settle[i])
+			return i;
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL(qcom_adc5_hw_settle_time_from_dt);
+
+int qcom_adc5_avg_samples_from_dt(u32 value)
+{
+	if (!is_power_of_2(value) || value > ADC5_AVG_SAMPLES_MAX)
+		return -EINVAL;
+
+	return __ffs(value);
+}
+EXPORT_SYMBOL(qcom_adc5_avg_samples_from_dt);
+
+int qcom_adc5_decimation_from_dt(u32 value,
+			    const unsigned int *decimation)
+{
+	unsigned int i;
+
+	for (i = 0; i < ADC5_DECIMATION_SAMPLES_MAX; i++) {
+		if (value == decimation[i])
+			return i;
+	}
+
+	return -EINVAL;
+}
+EXPORT_SYMBOL(qcom_adc5_decimation_from_dt);
+
 int qcom_vadc_decimation_from_dt(u32 value)
 {
 	if (!is_power_of_2(value) || value < VADC_DECIMATION_MIN ||
diff --git a/drivers/iio/adc/qcom-vadc-common.h b/drivers/iio/adc/qcom-vadc-common.h
index e074902a24cc..2c65ddc98696 100644
--- a/drivers/iio/adc/qcom-vadc-common.h
+++ b/drivers/iio/adc/qcom-vadc-common.h
@@ -153,10 +153,20 @@ struct qcom_adc5_scale_type {
 };
 
 int qcom_adc5_hw_scale(enum vadc_scale_fn_type scaletype,
-		    const struct vadc_prescale_ratio *prescale,
+		    unsigned int prescale_ratio,
 		    const struct adc5_data *data,
 		    u16 adc_code, int *result_mdec);
 
+int qcom_adc5_prescaling_from_dt(u32 num, u32 den);
+
+int qcom_adc5_hw_settle_time_from_dt(u32 value,
+		const unsigned int *hw_settle);
+
+int qcom_adc5_avg_samples_from_dt(u32 value);
+
+int qcom_adc5_decimation_from_dt(u32 value,
+			    const unsigned int *decimation);
+
 int qcom_vadc_decimation_from_dt(u32 value);
 
 #endif /* QCOM_VADC_COMMON_H */