| Message ID | 20221005161424.4537-2-olivier.moysan@foss.st.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | iio: stm32-adc: add support of adc for stm32mp13 | expand |
On Wed, 5 Oct 2022 18:14:17 +0200 Olivier Moysan <olivier.moysan@foss.st.com> wrote: > Fix channel init for ADC generic channel bindings. > In generic channel initialization, stm32_adc_smpr_init() is called > to initialize channel sampling time. The "st,min-sample-time-ns" > property is an optional property. If it is not defined, > stm32_adc_smpr_init() is currently skipped. > However stm32_adc_smpr_init() must always be called, > to force a minimum sampling time for the internal channels, > as the minimum sampling time is known. > Make stm32_adc_smpr_init() call unconditional. Hi Olivier. Andy commented on this in v2... Line lengths in patch description are rather random and no where near the typical 72-75 chars. Should look more like: Fix channel init for ADC generic channel bindings. In generic channel initialization, stm32_adc_smpr_init() is called > to initialize channel sampling time. The "st,min-sample-time-ns" property is an optional property. If it is not defined, stm32_adc_smpr_init() is currently skipped. However stm32_adc_smpr_init() must always be called, to force a minimum sampling time for the internal channels, as the minimum sampling time is known. Make stm32_adc_smpr_init() call unconditional. Fine to have multiple paragraphs, but within each one, don't wrap too early. > > Fixes: 796e5d0b1e9b ("iio: adc: stm32-adc: use generic binding for sample-time") > Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> > --- > drivers/iio/adc/stm32-adc.c | 11 ++++++----- > 1 file changed, 6 insertions(+), 5 deletions(-) > > diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c > index 6256977eb7f7..3cda529f081d 100644 > --- a/drivers/iio/adc/stm32-adc.c > +++ b/drivers/iio/adc/stm32-adc.c > @@ -2086,18 +2086,19 @@ static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev, > stm32_adc_chan_init_one(indio_dev, &channels[scan_index], val, > vin[1], scan_index, differential); > > + val = 0; > ret = fwnode_property_read_u32(child, "st,min-sample-time-ns", &val); > /* st,min-sample-time-ns is optional */ > - if (!ret) { > - stm32_adc_smpr_init(adc, channels[scan_index].channel, val); > - if (differential) > - stm32_adc_smpr_init(adc, vin[1], val); > - } else if (ret != -EINVAL) { > + if (ret && ret != -EINVAL) { > dev_err(&indio_dev->dev, "Invalid st,min-sample-time-ns property %d\n", > ret); > goto err; > } > > + stm32_adc_smpr_init(adc, channels[scan_index].channel, val); > + if (differential) > + stm32_adc_smpr_init(adc, vin[1], val); > + > scan_index++; > } >
diff --git a/drivers/iio/adc/stm32-adc.c b/drivers/iio/adc/stm32-adc.c index 6256977eb7f7..3cda529f081d 100644 --- a/drivers/iio/adc/stm32-adc.c +++ b/drivers/iio/adc/stm32-adc.c @@ -2086,18 +2086,19 @@ static int stm32_adc_generic_chan_init(struct iio_dev *indio_dev, stm32_adc_chan_init_one(indio_dev, &channels[scan_index], val, vin[1], scan_index, differential); + val = 0; ret = fwnode_property_read_u32(child, "st,min-sample-time-ns", &val); /* st,min-sample-time-ns is optional */ - if (!ret) { - stm32_adc_smpr_init(adc, channels[scan_index].channel, val); - if (differential) - stm32_adc_smpr_init(adc, vin[1], val); - } else if (ret != -EINVAL) { + if (ret && ret != -EINVAL) { dev_err(&indio_dev->dev, "Invalid st,min-sample-time-ns property %d\n", ret); goto err; } + stm32_adc_smpr_init(adc, channels[scan_index].channel, val); + if (differential) + stm32_adc_smpr_init(adc, vin[1], val); + scan_index++; }
Fix channel init for ADC generic channel bindings. In generic channel initialization, stm32_adc_smpr_init() is called to initialize channel sampling time. The "st,min-sample-time-ns" property is an optional property. If it is not defined, stm32_adc_smpr_init() is currently skipped. However stm32_adc_smpr_init() must always be called, to force a minimum sampling time for the internal channels, as the minimum sampling time is known. Make stm32_adc_smpr_init() call unconditional. Fixes: 796e5d0b1e9b ("iio: adc: stm32-adc: use generic binding for sample-time") Signed-off-by: Olivier Moysan <olivier.moysan@foss.st.com> --- drivers/iio/adc/stm32-adc.c | 11 ++++++----- 1 file changed, 6 insertions(+), 5 deletions(-)