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path: root/drivers/staging/iio/adc/spear_adc.c
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Diffstat (limited to 'drivers/staging/iio/adc/spear_adc.c')
-rw-r--r--drivers/staging/iio/adc/spear_adc.c126
1 files changed, 63 insertions, 63 deletions
diff --git a/drivers/staging/iio/adc/spear_adc.c b/drivers/staging/iio/adc/spear_adc.c
index 44a129f37d9c..3003e89b5779 100644
--- a/drivers/staging/iio/adc/spear_adc.c
+++ b/drivers/staging/iio/adc/spear_adc.c
@@ -70,7 +70,7 @@ struct adc_regs_spear6xx {
struct chan_data average;
};
-struct spear_adc_info {
+struct spear_adc_state {
struct device_node *np;
struct adc_regs_spear3xx __iomem *adc_base_spear3xx;
struct adc_regs_spear6xx __iomem *adc_base_spear6xx;
@@ -88,51 +88,51 @@ struct spear_adc_info {
* static inline functions, because of different register offsets
* on different SoC variants (SPEAr300 vs SPEAr600 etc).
*/
-static void spear_adc_set_status(struct spear_adc_info *info, u32 val)
+static void spear_adc_set_status(struct spear_adc_state *st, u32 val)
{
- __raw_writel(val, &info->adc_base_spear6xx->status);
+ __raw_writel(val, &st->adc_base_spear6xx->status);
}
-static void spear_adc_set_clk(struct spear_adc_info *info, u32 val)
+static void spear_adc_set_clk(struct spear_adc_state *st, u32 val)
{
u32 clk_high, clk_low, count;
- u32 apb_clk = clk_get_rate(info->clk);
+ u32 apb_clk = clk_get_rate(st->clk);
count = (apb_clk + val - 1) / val;
clk_low = count / 2;
clk_high = count - clk_low;
- info->current_clk = apb_clk / count;
+ st->current_clk = apb_clk / count;
__raw_writel(SPEAR_ADC_CLK_LOW(clk_low) | SPEAR_ADC_CLK_HIGH(clk_high),
- &info->adc_base_spear6xx->clk);
+ &st->adc_base_spear6xx->clk);
}
-static void spear_adc_set_ctrl(struct spear_adc_info *info, int n,
+static void spear_adc_set_ctrl(struct spear_adc_state *st, int n,
u32 val)
{
- __raw_writel(val, &info->adc_base_spear6xx->ch_ctrl[n]);
+ __raw_writel(val, &st->adc_base_spear6xx->ch_ctrl[n]);
}
-static u32 spear_adc_get_average(struct spear_adc_info *info)
+static u32 spear_adc_get_average(struct spear_adc_state *st)
{
- if (of_device_is_compatible(info->np, "st,spear600-adc")) {
- return __raw_readl(&info->adc_base_spear6xx->average.msb) &
+ if (of_device_is_compatible(st->np, "st,spear600-adc")) {
+ return __raw_readl(&st->adc_base_spear6xx->average.msb) &
SPEAR_ADC_DATA_MASK;
} else {
- return __raw_readl(&info->adc_base_spear3xx->average) &
+ return __raw_readl(&st->adc_base_spear3xx->average) &
SPEAR_ADC_DATA_MASK;
}
}
-static void spear_adc_set_scanrate(struct spear_adc_info *info, u32 rate)
+static void spear_adc_set_scanrate(struct spear_adc_state *st, u32 rate)
{
- if (of_device_is_compatible(info->np, "st,spear600-adc")) {
+ if (of_device_is_compatible(st->np, "st,spear600-adc")) {
__raw_writel(SPEAR600_ADC_SCAN_RATE_LO(rate),
- &info->adc_base_spear6xx->scan_rate_lo);
+ &st->adc_base_spear6xx->scan_rate_lo);
__raw_writel(SPEAR600_ADC_SCAN_RATE_HI(rate),
- &info->adc_base_spear6xx->scan_rate_hi);
+ &st->adc_base_spear6xx->scan_rate_hi);
} else {
- __raw_writel(rate, &info->adc_base_spear3xx->scan_rate);
+ __raw_writel(rate, &st->adc_base_spear3xx->scan_rate);
}
}
@@ -142,7 +142,7 @@ static int spear_read_raw(struct iio_dev *indio_dev,
int *val2,
long mask)
{
- struct spear_adc_info *info = iio_priv(indio_dev);
+ struct spear_adc_state *st = iio_priv(indio_dev);
u32 status;
switch (mask) {
@@ -150,26 +150,26 @@ static int spear_read_raw(struct iio_dev *indio_dev,
mutex_lock(&indio_dev->mlock);
status = SPEAR_ADC_STATUS_CHANNEL_NUM(chan->channel) |
- SPEAR_ADC_STATUS_AVG_SAMPLE(info->avg_samples) |
+ SPEAR_ADC_STATUS_AVG_SAMPLE(st->avg_samples) |
SPEAR_ADC_STATUS_START_CONVERSION |
SPEAR_ADC_STATUS_ADC_ENABLE;
- if (info->vref_external == 0)
+ if (st->vref_external == 0)
status |= SPEAR_ADC_STATUS_VREF_INTERNAL;
- spear_adc_set_status(info, status);
- wait_for_completion(&info->completion); /* set by ISR */
- *val = info->value;
+ spear_adc_set_status(st, status);
+ wait_for_completion(&st->completion); /* set by ISR */
+ *val = st->value;
mutex_unlock(&indio_dev->mlock);
return IIO_VAL_INT;
case IIO_CHAN_INFO_SCALE:
- *val = info->vref_external;
+ *val = st->vref_external;
*val2 = SPEAR_ADC_DATA_BITS;
return IIO_VAL_FRACTIONAL_LOG2;
case IIO_CHAN_INFO_SAMP_FREQ:
- *val = info->current_clk;
+ *val = st->current_clk;
return IIO_VAL_INT;
}
@@ -182,7 +182,7 @@ static int spear_adc_write_raw(struct iio_dev *indio_dev,
int val2,
long mask)
{
- struct spear_adc_info *info = iio_priv(indio_dev);
+ struct spear_adc_state *st = iio_priv(indio_dev);
int ret = 0;
if (mask != IIO_CHAN_INFO_SAMP_FREQ)
@@ -197,7 +197,7 @@ static int spear_adc_write_raw(struct iio_dev *indio_dev,
goto out;
}
- spear_adc_set_clk(info, val);
+ spear_adc_set_clk(st, val);
out:
mutex_unlock(&indio_dev->mlock);
@@ -226,32 +226,32 @@ static const struct iio_chan_spec spear_adc_iio_channels[] = {
static irqreturn_t spear_adc_isr(int irq, void *dev_id)
{
- struct spear_adc_info *info = (struct spear_adc_info *)dev_id;
+ struct spear_adc_state *st = (struct spear_adc_state *)dev_id;
/* Read value to clear IRQ */
- info->value = spear_adc_get_average(info);
- complete(&info->completion);
+ st->value = spear_adc_get_average(st);
+ complete(&st->completion);
return IRQ_HANDLED;
}
-static int spear_adc_configure(struct spear_adc_info *info)
+static int spear_adc_configure(struct spear_adc_state *st)
{
int i;
/* Reset ADC core */
- spear_adc_set_status(info, 0);
- __raw_writel(0, &info->adc_base_spear6xx->clk);
+ spear_adc_set_status(st, 0);
+ __raw_writel(0, &st->adc_base_spear6xx->clk);
for (i = 0; i < 8; i++)
- spear_adc_set_ctrl(info, i, 0);
- spear_adc_set_scanrate(info, 0);
+ spear_adc_set_ctrl(st, i, 0);
+ spear_adc_set_scanrate(st, 0);
- spear_adc_set_clk(info, info->sampling_freq);
+ spear_adc_set_clk(st, st->sampling_freq);
return 0;
}
-static const struct iio_info spear_adc_iio_info = {
+static const struct iio_info spear_adc_info = {
.read_raw = &spear_read_raw,
.write_raw = &spear_adc_write_raw,
.driver_module = THIS_MODULE,
@@ -261,40 +261,40 @@ static int spear_adc_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
- struct spear_adc_info *info;
+ struct spear_adc_state *st;
struct iio_dev *iodev = NULL;
int ret = -ENODEV;
int irq;
- iodev = devm_iio_device_alloc(dev, sizeof(struct spear_adc_info));
+ iodev = devm_iio_device_alloc(dev, sizeof(struct spear_adc_state));
if (!iodev) {
dev_err(dev, "failed allocating iio device\n");
return -ENOMEM;
}
- info = iio_priv(iodev);
- info->np = np;
+ st = iio_priv(iodev);
+ st->np = np;
/*
* SPEAr600 has a different register layout than other SPEAr SoC's
* (e.g. SPEAr3xx). Let's provide two register base addresses
* to support multi-arch kernels.
*/
- info->adc_base_spear6xx = of_iomap(np, 0);
- if (!info->adc_base_spear6xx) {
+ st->adc_base_spear6xx = of_iomap(np, 0);
+ if (!st->adc_base_spear6xx) {
dev_err(dev, "failed mapping memory\n");
return -ENOMEM;
}
- info->adc_base_spear3xx =
- (struct adc_regs_spear3xx __iomem *)info->adc_base_spear6xx;
+ st->adc_base_spear3xx =
+ (struct adc_regs_spear3xx __iomem *)st->adc_base_spear6xx;
- info->clk = clk_get(dev, NULL);
- if (IS_ERR(info->clk)) {
+ st->clk = clk_get(dev, NULL);
+ if (IS_ERR(st->clk)) {
dev_err(dev, "failed getting clock\n");
goto errout1;
}
- ret = clk_prepare_enable(info->clk);
+ ret = clk_prepare_enable(st->clk);
if (ret) {
dev_err(dev, "failed enabling clock\n");
goto errout2;
@@ -308,14 +308,14 @@ static int spear_adc_probe(struct platform_device *pdev)
}
ret = devm_request_irq(dev, irq, spear_adc_isr, 0, SPEAR_ADC_MOD_NAME,
- info);
+ st);
if (ret < 0) {
dev_err(dev, "failed requesting interrupt\n");
goto errout3;
}
if (of_property_read_u32(np, "sampling-frequency",
- &info->sampling_freq)) {
+ &st->sampling_freq)) {
dev_err(dev, "sampling-frequency missing in DT\n");
ret = -EINVAL;
goto errout3;
@@ -325,23 +325,23 @@ static int spear_adc_probe(struct platform_device *pdev)
* Optional avg_samples defaults to 0, resulting in single data
* conversion
*/
- of_property_read_u32(np, "average-samples", &info->avg_samples);
+ of_property_read_u32(np, "average-samples", &st->avg_samples);
/*
* Optional vref_external defaults to 0, resulting in internal vref
* selection
*/
- of_property_read_u32(np, "vref-external", &info->vref_external);
+ of_property_read_u32(np, "vref-external", &st->vref_external);
- spear_adc_configure(info);
+ spear_adc_configure(st);
platform_set_drvdata(pdev, iodev);
- init_completion(&info->completion);
+ init_completion(&st->completion);
iodev->name = SPEAR_ADC_MOD_NAME;
iodev->dev.parent = dev;
- iodev->info = &spear_adc_iio_info;
+ iodev->info = &spear_adc_info;
iodev->modes = INDIO_DIRECT_MODE;
iodev->channels = spear_adc_iio_channels;
iodev->num_channels = ARRAY_SIZE(spear_adc_iio_channels);
@@ -355,23 +355,23 @@ static int spear_adc_probe(struct platform_device *pdev)
return 0;
errout3:
- clk_disable_unprepare(info->clk);
+ clk_disable_unprepare(st->clk);
errout2:
- clk_put(info->clk);
+ clk_put(st->clk);
errout1:
- iounmap(info->adc_base_spear6xx);
+ iounmap(st->adc_base_spear6xx);
return ret;
}
static int spear_adc_remove(struct platform_device *pdev)
{
struct iio_dev *iodev = platform_get_drvdata(pdev);
- struct spear_adc_info *info = iio_priv(iodev);
+ struct spear_adc_state *st = iio_priv(iodev);
iio_device_unregister(iodev);
- clk_disable_unprepare(info->clk);
- clk_put(info->clk);
- iounmap(info->adc_base_spear6xx);
+ clk_disable_unprepare(st->clk);
+ clk_put(st->clk);
+ iounmap(st->adc_base_spear6xx);
return 0;
}
generated by cgit v1.2.3-55-g7522 (git 2.39.0) at 2024-07-09 22:36:31 +0200