From: Russ Dill <Russ.Dill@xxxxxx>
The driver is currently mishandling the IRQENABLE register. The driver
should write a 1 for bits it wishes to set, and a zero for bits it does not
wish to change. The read of the current register contents is not
necessary.
Write 0 = No action.
Read 0 = Interrupt disabled (masked).
Read 1 = Interrupt enabled.
Write 1 = Enable interrupt.
The current read/update/write method is currently not causing any
problems, but could cause confusion in the future.
Signed-off-by: Russ Dill <Russ.Dill@xxxxxx>
Signed-off-by: Zubair Lutfullah <zubair.lutfullah@xxxxxxxxx>
---
drivers/iio/adc/ti_am335x_adc.c | 14 ++++++--------
1 file changed, 6 insertions(+), 8 deletions(-)
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c
index c1b051c..b566e6a 100644
--- a/drivers/iio/adc/ti_am335x_adc.c
+++ b/drivers/iio/adc/ti_am335x_adc.c
@@ -207,7 +207,7 @@ static void tiadc_poll_handler(struct work_struct *work_s)
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, status;
+ unsigned int fifo1count, readx1;
int i;
u32 *inputbuffer;
@@ -223,9 +223,8 @@ static void tiadc_poll_handler(struct work_struct *work_s)
}
buffer->access->store_to(buffer, (u8 *) inputbuffer);
- status = tiadc_readl(adc_dev, REG_IRQENABLE);
tiadc_writel(adc_dev, REG_IRQENABLE,
- (status | IRQENB_FIFO1THRES));
+ IRQENB_FIFO1THRES);
kfree(inputbuffer);
}
@@ -242,7 +241,7 @@ 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, status, fifo1count;
+ unsigned int enb, fifo1count;
int stepnum, i;
u8 bit;
@@ -250,11 +249,10 @@ static int tiadc_buffer_postenable(struct iio_dev *idev)
pr_info("Data cannot be read continuously in one shot mode\n");
return -EINVAL;
} else {
- status = tiadc_readl(adc_dev, REG_IRQENABLE);
tiadc_writel(adc_dev, REG_IRQENABLE,
- (status | IRQENB_FIFO1THRES)|
- IRQENB_FIFO1OVRRUN |
- IRQENB_FIFO1UNDRFLW);
+ (IRQENB_FIFO1THRES |
+ IRQENB_FIFO1OVRRUN |
+ IRQENB_FIFO1UNDRFLW));
fifo1count = tiadc_readl(adc_dev, REG_FIFO1CNT);
for (i = 0; i < fifo1count; i++)
--
1.7.9.5
--
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