From: Jonathan Cameron <jic23@kernel.org> To: <Eugen.Hristev@microchip.com> Cc: <linux-iio@vger.kernel.org>, <linux-arm-kernel@lists.infradead.org>, <linux-kernel@vger.kernel.org>, <Ludovic.Desroches@microchip.com>, <alexandru.ardelean@analog.com> Subject: Re: [PATCH v3 1/3] iio: adc: at91-sama5d2_adc: fix differential channels in triggered mode Date: Sun, 2 Feb 2020 11:02:06 +0000 [thread overview] Message-ID: <20200202110206.7326ce4d@archlinux> (raw) In-Reply-To: <1580216189-27418-2-git-send-email-eugen.hristev@microchip.com> On Tue, 28 Jan 2020 12:57:39 +0000 <Eugen.Hristev@microchip.com> wrote: > From: Eugen Hristev <eugen.hristev@microchip.com> > > The differential channels require writing the channel offset register (COR). > Otherwise they do not work in differential mode. > The configuration of COR is missing in triggered mode. > > Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support") > Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Applied to the fixes-togreg branch of iio.git. Normally I avoid rebasing that branch but I may do so this time given it's currently mid merge window. The other two patches will have to wait for this one to get upstream of my togreg branch which will take a few weeks. Please give me a poke if I seem to have forgotten about them! Thanks, Jonathan > --- > Changes in v2: > - moved to the start of the list > > drivers/iio/adc/at91-sama5d2_adc.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c > index e1850f3..2a6950a 100644 > --- a/drivers/iio/adc/at91-sama5d2_adc.c > +++ b/drivers/iio/adc/at91-sama5d2_adc.c > @@ -723,6 +723,7 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state) > > for_each_set_bit(bit, indio->active_scan_mask, indio->num_channels) { > struct iio_chan_spec const *chan = at91_adc_chan_get(indio, bit); > + u32 cor; > > if (!chan) > continue; > @@ -732,6 +733,20 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state) > continue; > > if (state) { > + cor = at91_adc_readl(st, AT91_SAMA5D2_COR); > + > + if (chan->differential) > + cor |= (BIT(chan->channel) | > + BIT(chan->channel2)) << > + AT91_SAMA5D2_COR_DIFF_OFFSET; > + else > + cor &= ~(BIT(chan->channel) << > + AT91_SAMA5D2_COR_DIFF_OFFSET); > + > + at91_adc_writel(st, AT91_SAMA5D2_COR, cor); > + } > + > + if (state) { > at91_adc_writel(st, AT91_SAMA5D2_CHER, > BIT(chan->channel)); > /* enable irq only if not using DMA */
WARNING: multiple messages have this Message-ID (diff)
From: Jonathan Cameron <jic23@kernel.org> To: <Eugen.Hristev@microchip.com> Cc: linux-iio@vger.kernel.org, Ludovic.Desroches@microchip.com, linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org, alexandru.ardelean@analog.com Subject: Re: [PATCH v3 1/3] iio: adc: at91-sama5d2_adc: fix differential channels in triggered mode Date: Sun, 2 Feb 2020 11:02:06 +0000 [thread overview] Message-ID: <20200202110206.7326ce4d@archlinux> (raw) In-Reply-To: <1580216189-27418-2-git-send-email-eugen.hristev@microchip.com> On Tue, 28 Jan 2020 12:57:39 +0000 <Eugen.Hristev@microchip.com> wrote: > From: Eugen Hristev <eugen.hristev@microchip.com> > > The differential channels require writing the channel offset register (COR). > Otherwise they do not work in differential mode. > The configuration of COR is missing in triggered mode. > > Fixes: 5e1a1da0f8c9 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support") > Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Applied to the fixes-togreg branch of iio.git. Normally I avoid rebasing that branch but I may do so this time given it's currently mid merge window. The other two patches will have to wait for this one to get upstream of my togreg branch which will take a few weeks. Please give me a poke if I seem to have forgotten about them! Thanks, Jonathan > --- > Changes in v2: > - moved to the start of the list > > drivers/iio/adc/at91-sama5d2_adc.c | 15 +++++++++++++++ > 1 file changed, 15 insertions(+) > > diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c > index e1850f3..2a6950a 100644 > --- a/drivers/iio/adc/at91-sama5d2_adc.c > +++ b/drivers/iio/adc/at91-sama5d2_adc.c > @@ -723,6 +723,7 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state) > > for_each_set_bit(bit, indio->active_scan_mask, indio->num_channels) { > struct iio_chan_spec const *chan = at91_adc_chan_get(indio, bit); > + u32 cor; > > if (!chan) > continue; > @@ -732,6 +733,20 @@ static int at91_adc_configure_trigger(struct iio_trigger *trig, bool state) > continue; > > if (state) { > + cor = at91_adc_readl(st, AT91_SAMA5D2_COR); > + > + if (chan->differential) > + cor |= (BIT(chan->channel) | > + BIT(chan->channel2)) << > + AT91_SAMA5D2_COR_DIFF_OFFSET; > + else > + cor &= ~(BIT(chan->channel) << > + AT91_SAMA5D2_COR_DIFF_OFFSET); > + > + at91_adc_writel(st, AT91_SAMA5D2_COR, cor); > + } > + > + if (state) { > at91_adc_writel(st, AT91_SAMA5D2_CHER, > BIT(chan->channel)); > /* enable irq only if not using DMA */ _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-02-02 11:02 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2020-01-28 12:57 [PATCH v3 0/3] Enhancements to at91-sama5d2_adc driver Eugen.Hristev 2020-01-28 12:57 ` Eugen.Hristev 2020-01-28 12:57 ` [PATCH v3 1/3] iio: adc: at91-sama5d2_adc: fix differential channels in triggered mode Eugen.Hristev 2020-01-28 12:57 ` Eugen.Hristev 2020-02-02 11:02 ` Jonathan Cameron [this message] 2020-02-02 11:02 ` Jonathan Cameron 2020-03-23 10:42 ` Eugen.Hristev 2020-03-23 10:42 ` Eugen.Hristev 2020-03-28 17:31 ` Jonathan Cameron 2020-03-28 17:31 ` Jonathan Cameron 2020-01-28 12:57 ` [PATCH v3 2/3] iio: adc: at91-sama5d2_adc: handle unfinished conversions Eugen.Hristev 2020-01-28 12:57 ` Eugen.Hristev 2020-04-25 14:52 ` Jonathan Cameron 2020-04-25 14:52 ` Jonathan Cameron 2020-01-28 12:57 ` [PATCH v3 3/3] iio: adc: at91-sama5d2_adc: update for other trigger usage Eugen.Hristev 2020-01-28 12:57 ` Eugen.Hristev 2020-02-02 11:05 ` Jonathan Cameron 2020-02-02 11:05 ` Jonathan Cameron
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