From: Paul Cercueil <paul@crapouillou.net> To: Jonathan Cameron <jic23@kernel.org>, Lars-Peter Clausen <lars@metafoo.de> Cc: linux-iio@vger.kernel.org, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Paul Cercueil <paul@crapouillou.net>, Eugen Hristev <eugen.hristev@microchip.com>, Nicolas Ferre <nicolas.ferre@microchip.com>, Alexandre Belloni <alexandre.belloni@bootlin.com>, Ludovic Desroches <ludovic.desroches@microchip.com> Subject: [PATCH 2/2] iio: at91-sama5d2: Limit requested watermark value to hwfifo size Date: Mon, 17 Jan 2022 10:25:12 +0000 [thread overview] Message-ID: <20220117102512.31725-2-paul@crapouillou.net> (raw) In-Reply-To: <20220117102512.31725-1-paul@crapouillou.net> Instead of returning an error if the watermark value is too high, which the core will silently ignore anyway, limit the value to the hardware FIFO size; a lower-than-requested value is still better than using the default, which is usually 1. Cc: Eugen Hristev <eugen.hristev@microchip.com> Cc: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Paul Cercueil <paul@crapouillou.net> --- drivers/iio/adc/at91-sama5d2_adc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index 854b1f81d807..5cc84f4a17bb 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -1752,7 +1752,7 @@ static int at91_adc_set_watermark(struct iio_dev *indio_dev, unsigned int val) int ret; if (val > AT91_HWFIFO_MAX_SIZE) - return -EINVAL; + val = AT91_HWFIFO_MAX_SIZE; if (!st->selected_trig->hw_trig) { dev_dbg(&indio_dev->dev, "we need hw trigger for DMA\n"); -- 2.34.1
WARNING: multiple messages have this Message-ID (diff)
From: Paul Cercueil <paul@crapouillou.net> To: Jonathan Cameron <jic23@kernel.org>, Lars-Peter Clausen <lars@metafoo.de> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Paul Cercueil <paul@crapouillou.net>, Ludovic Desroches <ludovic.desroches@microchip.com>, Eugen Hristev <eugen.hristev@microchip.com>, linux-arm-kernel@lists.infradead.org Subject: [PATCH 2/2] iio: at91-sama5d2: Limit requested watermark value to hwfifo size Date: Mon, 17 Jan 2022 10:25:12 +0000 [thread overview] Message-ID: <20220117102512.31725-2-paul@crapouillou.net> (raw) In-Reply-To: <20220117102512.31725-1-paul@crapouillou.net> Instead of returning an error if the watermark value is too high, which the core will silently ignore anyway, limit the value to the hardware FIFO size; a lower-than-requested value is still better than using the default, which is usually 1. Cc: Eugen Hristev <eugen.hristev@microchip.com> Cc: Nicolas Ferre <nicolas.ferre@microchip.com> Cc: Alexandre Belloni <alexandre.belloni@bootlin.com> Cc: Ludovic Desroches <ludovic.desroches@microchip.com> Signed-off-by: Paul Cercueil <paul@crapouillou.net> --- drivers/iio/adc/at91-sama5d2_adc.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/iio/adc/at91-sama5d2_adc.c b/drivers/iio/adc/at91-sama5d2_adc.c index 854b1f81d807..5cc84f4a17bb 100644 --- a/drivers/iio/adc/at91-sama5d2_adc.c +++ b/drivers/iio/adc/at91-sama5d2_adc.c @@ -1752,7 +1752,7 @@ static int at91_adc_set_watermark(struct iio_dev *indio_dev, unsigned int val) int ret; if (val > AT91_HWFIFO_MAX_SIZE) - return -EINVAL; + val = AT91_HWFIFO_MAX_SIZE; if (!st->selected_trig->hw_trig) { dev_dbg(&indio_dev->dev, "we need hw trigger for DMA\n"); -- 2.34.1 _______________________________________________ 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:[~2022-01-17 10:25 UTC|newest] Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top 2022-01-17 10:25 [PATCH 1/2] iio: imu: st_lsm6dsx: Limit requested watermark value to hwfifo size Paul Cercueil 2022-01-17 10:25 ` Paul Cercueil 2022-01-17 10:25 ` Paul Cercueil [this message] 2022-01-17 10:25 ` [PATCH 2/2] iio: at91-sama5d2: " Paul Cercueil 2022-01-22 17:04 ` Jonathan Cameron 2022-01-22 17:04 ` Jonathan Cameron 2022-06-04 15:05 ` Jonathan Cameron 2022-06-04 15:05 ` Jonathan Cameron 2022-06-04 22:41 ` Paul Cercueil 2022-06-04 22:41 ` Paul Cercueil 2022-06-12 8:49 ` Jonathan Cameron 2022-06-12 8:49 ` Jonathan Cameron 2022-01-17 10:56 ` [PATCH 1/2] iio: imu: st_lsm6dsx: " Lorenzo Bianconi 2022-01-17 10:56 ` Lorenzo Bianconi
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