all clear. replaced printk with pr_info..
Signed-off-by: Zubair Lutfullah <zubair.lutful...@gmail.com>
---
drivers/iio/adc/ti_am335x_adc.c | 375 ++++++++++++++++++++-------------------
1 file changed, 188 insertions(+), 187 deletions(-)
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index 40eec84..b1438a7 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -44,9 +44,9 @@ struct tiadc_device {
u8 channel_step[8];
struct work_struct poll_work;
wait_queue_head_t wq_data_avail;
- int irq;
- bool is_continuous_mode;
- u16 *buffer;
+ int irq;
+ bool is_continuous_mode;
+ u16 *buffer;
};
static unsigned int tiadc_readl(struct tiadc_device *adc, unsigned int reg)
@@ -69,7 +69,7 @@ static u32 get_adc_step_mask(struct tiadc_device *adc_dev)
return step_en;
}
-static void tiadc_step_config(struct tiadc_device *adc_dev,bool mode)
+static void tiadc_step_config(struct tiadc_device *adc_dev, bool mode)
{
unsigned int stepconfig;
int i, steps;
@@ -86,10 +86,10 @@ static void tiadc_step_config(struct tiadc_device
*adc_dev,bool mode)
steps = TOTAL_STEPS - adc_dev->channels;
if (mode == 0)
- stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1;
+ stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1;
else
- stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1
- | STEPCONFIG_MODE_SWCNT;
+ stepconfig = STEPCONFIG_AVG_16 | STEPCONFIG_FIFO1
+ | STEPCONFIG_MODE_SWCNT;
for (i = 0; i < adc_dev->channels; i++) {
int chan;
@@ -106,225 +106,225 @@ static void tiadc_step_config(struct tiadc_device
*adc_dev,bool mode)
}
static ssize_t tiadc_show_mode(struct device *dev,
- struct device_attribute *attr, char *buf)
+ struct device_attribute *attr, char *buf)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct tiadc_device *adc_dev = iio_priv(indio_dev);
- unsigned int tmp;
-
- tmp = tiadc_readl(adc_dev, REG_STEPCONFIG(TOTAL_STEPS));
- tmp &= STEPCONFIG_MODE(1);
-
- if (tmp == 0x00)
- return sprintf(buf, "oneshot\n");
- else if (tmp == 0x01)
- return sprintf(buf, "continuous\n");
- else
- return sprintf(buf, "Operation mode unknown\n");
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tiadc_device *adc_dev = iio_priv(indio_dev);
+ unsigned int tmp;
+
+ tmp = tiadc_readl(adc_dev, REG_STEPCONFIG(TOTAL_STEPS));
+ tmp &= STEPCONFIG_MODE(1);
+
+ if (tmp == 0x00)
+ return sprintf(buf, "oneshot\n");
+ else if (tmp == 0x01)
+ return sprintf(buf, "continuous\n");
+ else
+ return sprintf(buf, "Operation mode unknown\n");
}
static ssize_t tiadc_set_mode(struct device *dev,
- struct device_attribute *attr, const char *buf, size_t count)
+ struct device_attribute *attr, const char *buf, size_t count)
{
- struct iio_dev *indio_dev = dev_get_drvdata(dev);
- struct tiadc_device *adc_dev = iio_priv(indio_dev);
- unsigned config;
+ struct iio_dev *indio_dev = dev_get_drvdata(dev);
+ struct tiadc_device *adc_dev = iio_priv(indio_dev);
+ unsigned config;
- config = tiadc_readl(adc_dev, REG_CTRL);
- config &= ~(CNTRLREG_TSCSSENB);
- tiadc_writel(adc_dev, REG_CTRL, config);
+ config = tiadc_readl(adc_dev, REG_CTRL);
+ config &= ~(CNTRLREG_TSCSSENB);
+ tiadc_writel(adc_dev, REG_CTRL, config);
if (!strncmp(buf, "oneshot", 7))
- adc_dev->is_continuous_mode = false;
- else if (!strncmp(buf, "continuous", 10))
- adc_dev->is_continuous_mode = true;
- else {
- dev_err(dev, "Operational mode unknown\n");
- return -EINVAL;
- }
-
+ adc_dev->is_continuous_mode = false;
+ else if (!strncmp(buf, "continuous", 10))
+ adc_dev->is_continuous_mode = true;
+ else {
+ dev_err(dev, "Operational mode unknown\n");
+ return -EINVAL;
+ }
+
tiadc_step_config(adc_dev, adc_dev->is_continuous_mode);
- config = tiadc_readl(adc_dev, REG_CTRL);
- tiadc_writel(adc_dev, REG_CTRL,
- (config | CNTRLREG_TSCSSENB));
- return count;
+ config = tiadc_readl(adc_dev, REG_CTRL);
+ tiadc_writel(adc_dev, REG_CTRL,
+ (config | CNTRLREG_TSCSSENB));
+ return count;
}
static IIO_DEVICE_ATTR(mode, S_IRUGO | S_IWUSR, tiadc_show_mode,
- tiadc_set_mode, 0);
+ tiadc_set_mode, 0);
static struct attribute *tiadc_attributes[] = {
- &iio_dev_attr_mode.dev_attr.attr,
- NULL,
+ &iio_dev_attr_mode.dev_attr.attr,
+ NULL,
};
static const struct attribute_group tiadc_attribute_group = {
- .attrs = tiadc_attributes,
+ .attrs = tiadc_attributes,
};
static irqreturn_t tiadc_irq(int irq, void *private)
{
- struct iio_dev *idev = private;
- struct tiadc_device *adc_dev = iio_priv(idev);
+ struct iio_dev *idev = private;
+ struct tiadc_device *adc_dev = iio_priv(idev);
unsigned int status, config;
- status = tiadc_readl(adc_dev, REG_IRQSTATUS);
- if (status & IRQENB_FIFO1OVRRUN) {
- config = tiadc_readl(adc_dev, REG_CTRL);
- config &= ~(CNTRLREG_TSCSSENB);
- tiadc_writel(adc_dev, REG_CTRL, config);
-
- tiadc_writel(adc_dev, REG_IRQSTATUS,
- IRQENB_FIFO1OVRRUN |
- IRQENB_FIFO1UNDRFLW |
- IRQENB_FIFO1THRES);
-
- tiadc_writel(adc_dev, REG_CTRL,
- (config | CNTRLREG_TSCSSENB));
+ status = tiadc_readl(adc_dev, REG_IRQSTATUS);
+ if (status & IRQENB_FIFO1OVRRUN) {
+ config = tiadc_readl(adc_dev, REG_CTRL);
+ config &= ~(CNTRLREG_TSCSSENB);
+ tiadc_writel(adc_dev, REG_CTRL, config);
+
+ tiadc_writel(adc_dev, REG_IRQSTATUS,
+ IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW |
+ IRQENB_FIFO1THRES);
+
+ tiadc_writel(adc_dev, REG_CTRL,
+ (config | CNTRLREG_TSCSSENB));
+ return IRQ_HANDLED;
+ } else if (status & IRQENB_FIFO1THRES) {
+ tiadc_writel(adc_dev, REG_IRQCLR,
+ IRQENB_FIFO1THRES);
+
+ if (iio_buffer_enabled(idev)) {
+ if (!work_pending(&adc_dev->poll_work))
+ schedule_work(&adc_dev->poll_work);
+ } else {
+ wake_up_interruptible(&adc_dev->wq_data_avail);
+ }
+
return IRQ_HANDLED;
- } else if (status & IRQENB_FIFO1THRES) {
- tiadc_writel(adc_dev, REG_IRQCLR,
- IRQENB_FIFO1THRES);
-
- if (iio_buffer_enabled(idev)) {
- if (!work_pending(&adc_dev->poll_work))
- schedule_work(&adc_dev->poll_work);
- } else {
- wake_up_interruptible(&adc_dev->wq_data_avail);
- }
-
- return IRQ_HANDLED;
} else {
- return IRQ_NONE;
- }
+ return IRQ_NONE;
+ }
}
static void tiadc_poll_handler(struct work_struct *work_s)
{
- struct tiadc_device *adc_dev =
- container_of(work_s, struct tiadc_device, poll_work);
- struct iio_dev *idev = iio_priv_to_dev(adc_dev);
- struct iio_buffer *buffer = idev->buffer;
- unsigned int fifo1count, readx1;
- int i;
- u32 *iBuf;
-
- fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
- if (fifo1count * sizeof(u32) <
- buffer->access->get_bytes_per_datum(buffer)) {
- dev_err(adc_dev->mfd_tscadc->dev, "%s: Short FIFO event\n",
- __func__);
- goto out;
- }
-
- iBuf = kmalloc((fifo1count) * sizeof(u32), GFP_KERNEL);
- if (iBuf == NULL)
- goto out;
-
- for (i = 0; i < fifo1count; i++) {
- readx1 = tiadc_readl(adc_dev, REG_FIFO1);
- readx1 &= FIFOREAD_DATA_MASK;
- iBuf[i] = readx1;
- }
-
- buffer->access->store_to(buffer, (u8 *) iBuf);
- kfree(iBuf);
-
-out:
+ struct tiadc_device *adc_dev =
+ container_of(work_s, struct tiadc_device, poll_work);
+ struct iio_dev *idev = iio_priv_to_dev(adc_dev);
+ struct iio_buffer *buffer = idev->buffer;
+ unsigned int fifo1count, readx1;
+ int i;
+ u32 *inputbuffer;
+
+ fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
+ if (fifo1count * sizeof(u32) <
+ buffer->access->get_bytes_per_datum(buffer)) {
+ dev_err(adc_dev->mfd_tscadc->dev, "%s: Short FIFO event\n",
+ __func__);
+ goto out;
+ }
+
+ inputbuffer = kmalloc((fifo1count) * sizeof(u32), GFP_KERNEL);
+ if (inputbuffer == NULL)
+ goto out;
+
+ for (i = 0; i < fifo1count; i++) {
+ readx1 = tiadc_readl(adc_dev, REG_FIFO1);
+ readx1 &= FIFOREAD_DATA_MASK;
+ inputbuffer[i] = readx1;
+ }
+
+ buffer->access->store_to(buffer, (u8 *) inputbuffer);
+ kfree(inputbuffer);
+
+out:
tiadc_writel(adc_dev, REG_IRQSTATUS,
IRQENB_FIFO1THRES);
- tiadc_writel(adc_dev, REG_IRQENABLE,
+ tiadc_writel(adc_dev, REG_IRQENABLE,
IRQENB_FIFO1THRES);
-
+
}
static int tiadc_buffer_preenable(struct iio_dev *idev)
{
- struct iio_buffer *buffer = idev->buffer;
+ struct iio_buffer *buffer = idev->buffer;
- buffer->access->set_bytes_per_datum(buffer, 16);
- return 0;
+ buffer->access->set_bytes_per_datum(buffer, 16);
+ return 0;
}
static int tiadc_buffer_postenable(struct iio_dev *idev)
{
- struct tiadc_device *adc_dev = iio_priv(idev);
- struct iio_buffer *buffer = idev->buffer;
- unsigned int enb, config;
- int stepnum;
- u8 bit;
-
- if (!adc_dev->is_continuous_mode) {
- printk("Data cannot be read continuously in one shot mode\n");
- return -EINVAL;
- } else {
-
- config = tiadc_readl(adc_dev, REG_CTRL);
- tiadc_writel(adc_dev, REG_CTRL,
- config & ~CNTRLREG_TSCSSENB);
- tiadc_writel(adc_dev, REG_CTRL,
- config | CNTRLREG_TSCSSENB);
-
- tiadc_writel(adc_dev, REG_IRQSTATUS,
- IRQENB_FIFO1THRES |
- IRQENB_FIFO1OVRRUN |
- IRQENB_FIFO1UNDRFLW);
- tiadc_writel(adc_dev, REG_IRQENABLE,
- IRQENB_FIFO1THRES |
- IRQENB_FIFO1OVRRUN);
-
- tiadc_writel(adc_dev, REG_SE, 0x00);
- for_each_set_bit(bit, buffer->scan_mask,
- adc_dev->channels) {
- struct iio_chan_spec const *chan = idev->channels +
bit;
- /*
- * There are a total of 16 steps available
- * that are shared between ADC and touchscreen.
- * We start configuring from step 16 to 0 incase of
- * ADC. Hence the relation between input channel
- * and step for ADC would be as below.
- */
- stepnum = chan->channel + 9;
- enb = tiadc_readl(adc_dev, REG_SE);
- enb |= (1 << stepnum);
- tiadc_writel(adc_dev, REG_SE, enb);
- }
- return 0;
- }
+ struct tiadc_device *adc_dev = iio_priv(idev);
+ struct iio_buffer *buffer = idev->buffer;
+ unsigned int enb, config;
+ int stepnum;
+ u8 bit;
+
+ if (!adc_dev->is_continuous_mode) {
+ pr_info("Data cannot be read continuously in one shot mode\n");
+ return -EINVAL;
+ } else {
+
+ config = tiadc_readl(adc_dev, REG_CTRL);
+ tiadc_writel(adc_dev, REG_CTRL,
+ config & ~CNTRLREG_TSCSSENB);
+ tiadc_writel(adc_dev, REG_CTRL,
+ config | CNTRLREG_TSCSSENB);
+
+ tiadc_writel(adc_dev, REG_IRQSTATUS,
+ IRQENB_FIFO1THRES |
+ IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW);
+ tiadc_writel(adc_dev, REG_IRQENABLE,
+ IRQENB_FIFO1THRES |
+ IRQENB_FIFO1OVRRUN);
+
+ tiadc_writel(adc_dev, REG_SE, 0x00);
+ for_each_set_bit(bit, buffer->scan_mask,
+ adc_dev->channels) {
+ struct iio_chan_spec const *chan = idev->channels + bit;
+ /*
+ * There are a total of 16 steps available
+ * that are shared between ADC and touchscreen.
+ * We start configuring from step 16 to 0 incase of
+ * ADC. Hence the relation between input channel
+ * and step for ADC would be as below.
+ */
+ stepnum = chan->channel + 9;
+ enb = tiadc_readl(adc_dev, REG_SE);
+ enb |= (1 << stepnum);
+ tiadc_writel(adc_dev, REG_SE, enb);
+ }
+ return 0;
+ }
}
static int tiadc_buffer_postdisable(struct iio_dev *idev)
{
- struct tiadc_device *adc_dev = iio_priv(idev);
-
+ struct tiadc_device *adc_dev = iio_priv(idev);
+
tiadc_writel(adc_dev, REG_IRQCLR, (IRQENB_FIFO1THRES |
- IRQENB_FIFO1OVRRUN |
- IRQENB_FIFO1UNDRFLW));
- tiadc_writel(adc_dev, REG_SE, STPENB_STEPENB_TC);
- return 0;
+ IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW));
+ tiadc_writel(adc_dev, REG_SE, STPENB_STEPENB_TC);
+ return 0;
}
static const struct iio_buffer_setup_ops tiadc_buffer_setup_ops = {
- .preenable = &tiadc_buffer_preenable,
- .postenable = &tiadc_buffer_postenable,
- .postdisable = &tiadc_buffer_postdisable,
+ .preenable = &tiadc_buffer_preenable,
+ .postenable = &tiadc_buffer_postenable,
+ .postdisable = &tiadc_buffer_postdisable,
};
static int tiadc_config_sw_ring(struct iio_dev *idev)
{
- struct tiadc_device *adc_dev = iio_priv(idev);
+ struct tiadc_device *adc_dev = iio_priv(idev);
- idev->buffer = iio_kfifo_allocate(idev);
- if (!idev->buffer)
- return(-ENOMEM);
+ idev->buffer = iio_kfifo_allocate(idev);
+ if (!idev->buffer)
+ return -ENOMEM;
- idev->setup_ops = &tiadc_buffer_setup_ops;
+ idev->setup_ops = &tiadc_buffer_setup_ops;
- INIT_WORK(&adc_dev->poll_work, &tiadc_poll_handler);
+ INIT_WORK(&adc_dev->poll_work, &tiadc_poll_handler);
- idev->modes |= INDIO_BUFFER_HARDWARE;
- return 0;
+ idev->modes |= INDIO_BUFFER_HARDWARE;
+ return 0;
}
static const char * const chan_name_ain[] = {
@@ -389,14 +389,14 @@ static int tiadc_read_raw(struct iio_dev *indio_dev,
unsigned long timeout = jiffies + usecs_to_jiffies
(IDLE_TIMEOUT * adc_dev->channels);
- if (adc_dev->is_continuous_mode) {
- printk("One shot mode not enabled\n");
- return -EINVAL;
- } else {
+ if (adc_dev->is_continuous_mode) {
+ pr_info("One shot mode not enabled\n");
+ return -EINVAL;
+ } else {
step_en = get_adc_step_mask(adc_dev);
am335x_tsc_se_set(adc_dev->mfd_tscadc, step_en);
-
+
/* Wait for ADC sequencer to complete sampling */
while (tiadc_readl(adc_dev, REG_ADCFSM) & SEQ_STATUS) {
if (time_after(jiffies, timeout))
@@ -437,16 +437,17 @@ static int tiadc_read_raw(struct iio_dev *indio_dev,
}
}
- switch (mask){
- case IIO_CHAN_INFO_RAW : /*Do nothing. Above code works
fine.*/
+ switch (mask) {
+ case IIO_CHAN_INFO_RAW: /*Do nothing. Above code works fine.*/
break;
- case IIO_CHAN_INFO_SCALE : {
- /*12 Bit adc. Scale value for 1800mV AVDD.
Ideally
- AVDD should come from DT.*/
- *val = div_u64( (u64)(*val) * 1800 , 4096);
+ case IIO_CHAN_INFO_SCALE: {
+ /*12 Bit adc. Scale value for 1800mV AVDD. Ideally
+ AVDD should come from DT.*/
+ *val = div_u64((u64)(*val) * 1800 , 4096);
break;
}
- default: break;
+ default:
+ break;
}
if (found == false)
@@ -518,7 +519,7 @@ static int tiadc_probe(struct platform_device *pdev)
err = tiadc_config_sw_ring(indio_dev);
if (err < 0)
goto err_unregister;
-
+
err = iio_buffer_register(indio_dev,
indio_dev->channels, indio_dev->num_channels);
if (err < 0)
@@ -588,16 +589,16 @@ static int tiadc_resume(struct device *dev)
struct tiadc_device *adc_dev = iio_priv(indio_dev);
unsigned int restore;
- restore = tiadc_readl(adc_dev, REG_CTRL);
- restore &= ~(CNTRLREG_TSCSSENB);
- tiadc_writel(adc_dev, REG_CTRL, restore);
+ restore = tiadc_readl(adc_dev, REG_CTRL);
+ restore &= ~(CNTRLREG_TSCSSENB);
+ tiadc_writel(adc_dev, REG_CTRL, restore);
- tiadc_writel(adc_dev, REG_FIFO1THR, FIFO1_THRESHOLD);
- tiadc_step_config(adc_dev, adc_dev->is_continuous_mode);
+ tiadc_writel(adc_dev, REG_FIFO1THR, FIFO1_THRESHOLD);
+ tiadc_step_config(adc_dev, adc_dev->is_continuous_mode);
/* Make sure ADC is powered up */
restore &= ~(CNTRLREG_POWERDOWN);
- restore |= CNTRLREG_TSCSSENB;
+ restore |= CNTRLREG_TSCSSENB;
tiadc_writel(adc_dev, REG_CTRL, restore);
return 0;
--
1.7.9.5
--
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