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path: root/drivers/mfd/wm831x-auxadc.c
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Diffstat (limited to 'drivers/mfd/wm831x-auxadc.c')
-rw-r--r--drivers/mfd/wm831x-auxadc.c43
1 files changed, 18 insertions, 25 deletions
diff --git a/drivers/mfd/wm831x-auxadc.c b/drivers/mfd/wm831x-auxadc.c
index 65b98f3fbd..18618a8f92 100644
--- a/drivers/mfd/wm831x-auxadc.c
+++ b/drivers/mfd/wm831x-auxadc.c
@@ -152,7 +152,7 @@ static irqreturn_t wm831x_auxadc_irq(int irq, void *irq_data)
static int wm831x_auxadc_read_polled(struct wm831x *wm831x,
enum wm831x_auxadc input)
{
- int ret, src, timeout;
+ int ret, src;
mutex_lock(&wm831x->auxadc_lock);
@@ -179,32 +179,25 @@ static int wm831x_auxadc_read_polled(struct wm831x *wm831x,
goto disable;
}
- /* If we're not using interrupts then poll the
- * interrupt status register */
- timeout = 5;
- while (timeout) {
- msleep(1);
+ /* If we're not using interrupts then read the interrupt status register */
+ msleep(20);
- ret = wm831x_reg_read(wm831x,
- WM831X_INTERRUPT_STATUS_1);
- if (ret < 0) {
- dev_err(wm831x->dev,
- "ISR 1 read failed: %d\n", ret);
- goto disable;
- }
+ ret = wm831x_reg_read(wm831x, WM831X_INTERRUPT_STATUS_1);
+ if (ret < 0) {
+ dev_err(wm831x->dev,
+ "ISR 1 read failed: %d\n", ret);
+ goto disable;
+ }
- /* Did it complete? */
- if (ret & WM831X_AUXADC_DATA_EINT) {
- wm831x_reg_write(wm831x,
- WM831X_INTERRUPT_STATUS_1,
- WM831X_AUXADC_DATA_EINT);
- break;
- } else {
- dev_err(wm831x->dev,
- "AUXADC conversion timeout\n");
- ret = -EBUSY;
- goto disable;
- }
+ /* Did it complete? */
+ if (ret & WM831X_AUXADC_DATA_EINT) {
+ wm831x_reg_write(wm831x, WM831X_INTERRUPT_STATUS_1,
+ WM831X_AUXADC_DATA_EINT);
+ } else {
+ dev_err(wm831x->dev,
+ "AUXADC conversion timeout\n");
+ ret = -EBUSY;
+ goto disable;
}
ret = wm831x_reg_read(wm831x, WM831X_AUXADC_DATA);