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| author | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-27 10:19:32 +0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2017-03-27 10:19:32 +0300 |
| commit | e47ff590cc57a3468c1f77e5f2494bbaefdd4371 (patch) | |
| tree | 7c71b3832c0d805b0ee6daa1aaaa50326b65654f /drivers/iio/adc/ti_am335x_adc.c | |
| parent | 2e58cafa0bbde529a9f44300382f60f6ce46d7d2 (diff) | |
| parent | c02ed2e75ef4c74e41e421acb4ef1494671585e8 (diff) | |
| download | linux-e47ff590cc57a3468c1f77e5f2494bbaefdd4371.tar.xz | |
Merge 4.11-rc4 into usb-next
This resolves a merge issue in the gadget code, and we want the USB
fixes in here as well.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Diffstat (limited to 'drivers/iio/adc/ti_am335x_adc.c')
| -rw-r--r-- | drivers/iio/adc/ti_am335x_adc.c | 13 |
1 files changed, 12 insertions, 1 deletions
diff --git a/drivers/iio/adc/ti_am335x_adc.c b/drivers/iio/adc/ti_am335x_adc.c index ad9dec30bb30..4282ceca3d8f 100644 --- a/drivers/iio/adc/ti_am335x_adc.c +++ b/drivers/iio/adc/ti_am335x_adc.c @@ -169,7 +169,9 @@ static irqreturn_t tiadc_irq_h(int irq, void *private) { struct iio_dev *indio_dev = private; struct tiadc_device *adc_dev = iio_priv(indio_dev); - unsigned int status, config; + unsigned int status, config, adc_fsm; + unsigned short count = 0; + status = tiadc_readl(adc_dev, REG_IRQSTATUS); /* @@ -183,6 +185,15 @@ static irqreturn_t tiadc_irq_h(int irq, void *private) tiadc_writel(adc_dev, REG_CTRL, config); tiadc_writel(adc_dev, REG_IRQSTATUS, IRQENB_FIFO1OVRRUN | IRQENB_FIFO1UNDRFLW | IRQENB_FIFO1THRES); + + /* wait for idle state. + * ADC needs to finish the current conversion + * before disabling the module + */ + do { + adc_fsm = tiadc_readl(adc_dev, REG_ADCFSM); + } while (adc_fsm != 0x10 && count++ < 100); + tiadc_writel(adc_dev, REG_CTRL, (config | CNTRLREG_TSCSSENB)); return IRQ_HANDLED; } else if (status & IRQENB_FIFO1THRES) { |