| Message ID | 1398850015-17761-5-git-send-email-ch.naveen@samsung.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On 30/04/14 10:26, Naveen Krishna Chatradhi wrote: > Do a soft reset software if a timeout happens. > This is applicable only for ADC_V2. > > Signed-off-by: Naveen Krishna Chatradhi <ch.naveen@samsung.com> > Reviewed-by: Doug Anderson <dianders@chromium.org> Applied to the togreg branch of iio.git Thanks, > --- > Changes since v2: > None > Changes since v1: > None > v0: > This change is a part of the patch reviewed at https://lkml.org/lkml/2013/11/5/92 > > drivers/iio/adc/exynos_adc.c | 50 ++++++++++++++++++++++-------------------- > 1 file changed, 26 insertions(+), 24 deletions(-) > > diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c > index 939aaf7..eddc58e 100644 > --- a/drivers/iio/adc/exynos_adc.c > +++ b/drivers/iio/adc/exynos_adc.c > @@ -112,6 +112,30 @@ static inline unsigned int exynos_adc_get_version(struct platform_device *pdev) > return (unsigned int)match->data; > } > > +static void exynos_adc_hw_init(struct exynos_adc *info) > +{ > + u32 con1, con2; > + > + if (info->version == ADC_V2) { > + con1 = ADC_V2_CON1_SOFT_RESET; > + writel(con1, ADC_V2_CON1(info->regs)); > + > + con2 = ADC_V2_CON2_OSEL | ADC_V2_CON2_ESEL | > + ADC_V2_CON2_HIGHF | ADC_V2_CON2_C_TIME(0); > + writel(con2, ADC_V2_CON2(info->regs)); > + > + /* Enable interrupts */ > + writel(1, ADC_V2_INT_EN(info->regs)); > + } else { > + /* set default prescaler values and Enable prescaler */ > + con1 = ADC_V1_CON_PRSCLV(49) | ADC_V1_CON_PRSCEN; > + > + /* Enable 12-bit ADC resolution */ > + con1 |= ADC_V1_CON_RES; > + writel(con1, ADC_V1_CON(info->regs)); > + } > +} > + > static int exynos_read_raw(struct iio_dev *indio_dev, > struct iio_chan_spec const *chan, > int *val, > @@ -149,6 +173,8 @@ static int exynos_read_raw(struct iio_dev *indio_dev, > timeout = wait_for_completion_timeout > (&info->completion, EXYNOS_ADC_TIMEOUT); > if (timeout == 0) { > + dev_warn(&indio_dev->dev, "Conversion timed out! Resetting\n"); > + exynos_adc_hw_init(info); > ret = -ETIMEDOUT; > } else { > *val = info->value; > @@ -230,30 +256,6 @@ static int exynos_adc_remove_devices(struct device *dev, void *c) > return 0; > } > > -static void exynos_adc_hw_init(struct exynos_adc *info) > -{ > - u32 con1, con2; > - > - if (info->version == ADC_V2) { > - con1 = ADC_V2_CON1_SOFT_RESET; > - writel(con1, ADC_V2_CON1(info->regs)); > - > - con2 = ADC_V2_CON2_OSEL | ADC_V2_CON2_ESEL | > - ADC_V2_CON2_HIGHF | ADC_V2_CON2_C_TIME(0); > - writel(con2, ADC_V2_CON2(info->regs)); > - > - /* Enable interrupts */ > - writel(1, ADC_V2_INT_EN(info->regs)); > - } else { > - /* set default prescaler values and Enable prescaler */ > - con1 = ADC_V1_CON_PRSCLV(49) | ADC_V1_CON_PRSCEN; > - > - /* Enable 12-bit ADC resolution */ > - con1 |= ADC_V1_CON_RES; > - writel(con1, ADC_V1_CON(info->regs)); > - } > -} > - > static int exynos_adc_probe(struct platform_device *pdev) > { > struct exynos_adc *info = NULL; > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/iio/adc/exynos_adc.c b/drivers/iio/adc/exynos_adc.c index 939aaf7..eddc58e 100644 --- a/drivers/iio/adc/exynos_adc.c +++ b/drivers/iio/adc/exynos_adc.c @@ -112,6 +112,30 @@ static inline unsigned int exynos_adc_get_version(struct platform_device *pdev) return (unsigned int)match->data; } +static void exynos_adc_hw_init(struct exynos_adc *info) +{ + u32 con1, con2; + + if (info->version == ADC_V2) { + con1 = ADC_V2_CON1_SOFT_RESET; + writel(con1, ADC_V2_CON1(info->regs)); + + con2 = ADC_V2_CON2_OSEL | ADC_V2_CON2_ESEL | + ADC_V2_CON2_HIGHF | ADC_V2_CON2_C_TIME(0); + writel(con2, ADC_V2_CON2(info->regs)); + + /* Enable interrupts */ + writel(1, ADC_V2_INT_EN(info->regs)); + } else { + /* set default prescaler values and Enable prescaler */ + con1 = ADC_V1_CON_PRSCLV(49) | ADC_V1_CON_PRSCEN; + + /* Enable 12-bit ADC resolution */ + con1 |= ADC_V1_CON_RES; + writel(con1, ADC_V1_CON(info->regs)); + } +} + static int exynos_read_raw(struct iio_dev *indio_dev, struct iio_chan_spec const *chan, int *val, @@ -149,6 +173,8 @@ static int exynos_read_raw(struct iio_dev *indio_dev, timeout = wait_for_completion_timeout (&info->completion, EXYNOS_ADC_TIMEOUT); if (timeout == 0) { + dev_warn(&indio_dev->dev, "Conversion timed out! Resetting\n"); + exynos_adc_hw_init(info); ret = -ETIMEDOUT; } else { *val = info->value; @@ -230,30 +256,6 @@ static int exynos_adc_remove_devices(struct device *dev, void *c) return 0; } -static void exynos_adc_hw_init(struct exynos_adc *info) -{ - u32 con1, con2; - - if (info->version == ADC_V2) { - con1 = ADC_V2_CON1_SOFT_RESET; - writel(con1, ADC_V2_CON1(info->regs)); - - con2 = ADC_V2_CON2_OSEL | ADC_V2_CON2_ESEL | - ADC_V2_CON2_HIGHF | ADC_V2_CON2_C_TIME(0); - writel(con2, ADC_V2_CON2(info->regs)); - - /* Enable interrupts */ - writel(1, ADC_V2_INT_EN(info->regs)); - } else { - /* set default prescaler values and Enable prescaler */ - con1 = ADC_V1_CON_PRSCLV(49) | ADC_V1_CON_PRSCEN; - - /* Enable 12-bit ADC resolution */ - con1 |= ADC_V1_CON_RES; - writel(con1, ADC_V1_CON(info->regs)); - } -} - static int exynos_adc_probe(struct platform_device *pdev) { struct exynos_adc *info = NULL;