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Subject[PATCH V4 5/5] iio: adc: Clean up ADC code common to PMIC5 and PMIC7
Date
This commit includes the following changes:
Add a common function used for read_raw callback for
both PMIC5 and PMIC7 ADCs.
Add exit function for ADC.
Add info_property under adc_data to more efficiently
distinguish PMIC5 and PMIC7 ADCs.

Signed-off-by: Jishnu Prakash <jprakash@codeaurora.org>
---
drivers/iio/adc/qcom-spmi-adc5.c | 83 +++++++++++++++++++++-----------------
drivers/iio/adc/qcom-vadc-common.h | 1 +
2 files changed, 48 insertions(+), 36 deletions(-)

diff --git a/drivers/iio/adc/qcom-spmi-adc5.c b/drivers/iio/adc/qcom-spmi-adc5.c
index 974073f..fbe7a39 100644
--- a/drivers/iio/adc/qcom-spmi-adc5.c
+++ b/drivers/iio/adc/qcom-spmi-adc5.c
@@ -167,8 +167,6 @@ static const struct vadc_prescale_ratio adc5_prescale_ratios[] = {
{.num = 1, .den = 16}
};

-static const struct adc5_data adc7_data_pmic;
-
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);
@@ -452,6 +450,13 @@ 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;
@@ -490,9 +495,9 @@ 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;
@@ -503,8 +508,9 @@ 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;

@@ -512,6 +518,7 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
&adc5_prescale_ratios[prop->prescale],
adc->data,
adc_code_volt, val);
+
if (ret)
return ret;

@@ -523,38 +530,28 @@ static int adc5_read_raw(struct iio_dev *indio_dev,
return 0;
}

-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];
+ struct adc_do_conversion do_conv;

- switch (mask) {
- case IIO_CHAN_INFO_PROCESSED:
- ret = adc7_do_conversion(adc, prop, chan,
- &adc_code_volt, &adc_code_cur);
- if (ret)
- return ret;
+ do_conv.adc_do_conversion = adc5_do_conversion;

- ret = qcom_adc5_hw_scale(prop->scale_fn_type,
- &adc5_prescale_ratios[prop->prescale],
- adc->data,
- adc_code_volt, val);
+ 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 0;
+ return adc_read_raw_common(indio_dev, chan, val, val2,
+ mask, do_conv);
}

static const struct iio_info adc5_info = {
@@ -710,7 +707,7 @@ static int adc5_get_dt_channel_data(struct adc5_chip *adc,

/* virtual channel number = sid << 8 | channel number */

- if (adc->data == &adc7_data_pmic) {
+ if (adc->data->info == &adc7_info) {
sid = chan >> ADC_CHANNEL_OFFSET;
chan = chan & ADC_CHANNEL_MASK;
}
@@ -776,7 +773,7 @@ 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) ||
- adc->data == &adc7_data_pmic)
+ adc->data->info == &adc7_info)
ret = adc5_hw_settle_time_from_dt(value,
data->hw_settle_2);
else
@@ -826,6 +823,7 @@ static const struct adc5_data adc5_data_pmic = {
.full_scale_code_volt = 0x70e4,
.full_scale_code_cur = 0x2710,
.adc_chans = adc5_chans_pmic,
+ .info = &adc5_info,
.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
{250, 420, 840},
.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -839,6 +837,7 @@ static const struct adc5_data adc5_data_pmic = {
static const struct adc5_data adc7_data_pmic = {
.full_scale_code_volt = 0x70e4,
.adc_chans = adc7_chans_pmic,
+ .info = &adc7_info,
.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
{85, 340, 1360},
.hw_settle_2 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -851,6 +850,7 @@ static const struct adc5_data adc5_data_pmic_rev2 = {
.full_scale_code_volt = 0x4000,
.full_scale_code_cur = 0x1800,
.adc_chans = adc5_chans_rev2,
+ .info = &adc5_info,
.decimation = (unsigned int [ADC5_DECIMATION_SAMPLES_MAX])
{256, 512, 1024},
.hw_settle_1 = (unsigned int [VADC_HW_SETTLE_SAMPLES_MAX])
@@ -965,10 +965,7 @@ static int adc5_probe(struct platform_device *pdev)
adc->dev = dev;
adc->base = reg;

- if (of_device_is_compatible(node, "qcom,spmi-adc7"))
- indio_dev->info = &adc7_info;
- else
- indio_dev->info = &adc5_info;
+ platform_set_drvdata(pdev, adc);

init_completion(&adc->complete);
mutex_init(&adc->lock);
@@ -979,6 +976,8 @@ static int adc5_probe(struct platform_device *pdev)
return ret;
}

+ indio_dev->info = adc->data->info;
+
irq_eoc = platform_get_irq(pdev, 0);
if (irq_eoc < 0) {
if (irq_eoc == -EPROBE_DEFER || irq_eoc == -EINVAL)
@@ -991,6 +990,8 @@ static int adc5_probe(struct platform_device *pdev)
return ret;
}

+ adc->irq_eoc = irq_eoc;
+
indio_dev->dev.parent = dev;
indio_dev->dev.of_node = node;
indio_dev->name = pdev->name;
@@ -1001,12 +1002,22 @@ static int adc5_probe(struct platform_device *pdev)
return devm_iio_device_register(dev, indio_dev);
}

+static int adc5_exit(struct platform_device *pdev)
+{
+ struct adc5_chip *adc = platform_get_drvdata(pdev);
+
+ if (adc->irq_eoc >= 0)
+ disable_irq(adc->irq_eoc);
+ return 0;
+}
+
static struct platform_driver adc5_driver = {
.driver = {
.name = "qcom-spmi-adc5.c",
.of_match_table = adc5_match_table,
},
.probe = adc5_probe,
+ .remove = adc5_exit,
};
module_platform_driver(adc5_driver);

diff --git a/drivers/iio/adc/qcom-vadc-common.h b/drivers/iio/adc/qcom-vadc-common.h
index 5f9e680..d195e83 100644
--- a/drivers/iio/adc/qcom-vadc-common.h
+++ b/drivers/iio/adc/qcom-vadc-common.h
@@ -150,6 +150,7 @@ struct adc5_data {
const u32 full_scale_code_volt;
const u32 full_scale_code_cur;
const struct adc5_channels *adc_chans;
+ const struct iio_info *info;
unsigned int *decimation;
unsigned int *hw_settle_1;
unsigned int *hw_settle_2;
--
The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
a Linux Foundation Collaborative Project
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