From: Miquel Raynal <miquel.raynal@bootlin.com> To: Jonathan Cameron <jic23@kernel.org>, Hartmut Knaack <knaack.h@gmx.de>, Lars-Peter Clausen <lars@metafoo.de>, Peter Meerwald-Stadler <pmeerw@pmeerw.net>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com> Cc: <devicetree@vger.kernel.org>, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Miquel Raynal <miquel.raynal@bootlin.com> Subject: [PATCH 3/7] iio: adc: max1027: Reset the device at probe time Date: Wed, 2 Oct 2019 14:30:21 +0200 [thread overview] Message-ID: <20191002123025.21413-4-miquel.raynal@bootlin.com> (raw) In-Reply-To: <20191002123025.21413-1-miquel.raynal@bootlin.com> All the registers are configured by the driver, let's reset the chip at probe time, avoiding any conflict with a possible earlier configuration. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/iio/adc/max1027.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c index 823223b77a70..f9b473ee6711 100644 --- a/drivers/iio/adc/max1027.c +++ b/drivers/iio/adc/max1027.c @@ -466,6 +466,14 @@ static int max1027_probe(struct spi_device *spi) } } + /* Internal reset */ + st->reg = MAX1027_RST_REG; + ret = spi_write(st->spi, &st->reg, 1); + if (ret < 0) { + dev_err(&indio_dev->dev, "Failed to reset the ADC\n"); + return ret; + } + /* Disable averaging */ st->reg = MAX1027_AVG_REG; ret = spi_write(st->spi, &st->reg, 1); -- 2.20.1
WARNING: multiple messages have this Message-ID (diff)
From: Miquel Raynal <miquel.raynal@bootlin.com> To: Jonathan Cameron <jic23@kernel.org>, Hartmut Knaack <knaack.h@gmx.de>, Lars-Peter Clausen <lars@metafoo.de>, Peter Meerwald-Stadler <pmeerw@pmeerw.net>, Rob Herring <robh+dt@kernel.org>, Mark Rutland <mark.rutland@arm.com> Cc: devicetree@vger.kernel.org, linux-iio@vger.kernel.org, linux-kernel@vger.kernel.org, Thomas Petazzoni <thomas.petazzoni@bootlin.com>, Miquel Raynal <miquel.raynal@bootlin.com> Subject: [PATCH 3/7] iio: adc: max1027: Reset the device at probe time Date: Wed, 2 Oct 2019 14:30:21 +0200 [thread overview] Message-ID: <20191002123025.21413-4-miquel.raynal@bootlin.com> (raw) In-Reply-To: <20191002123025.21413-1-miquel.raynal@bootlin.com> All the registers are configured by the driver, let's reset the chip at probe time, avoiding any conflict with a possible earlier configuration. Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com> --- drivers/iio/adc/max1027.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/drivers/iio/adc/max1027.c b/drivers/iio/adc/max1027.c index 823223b77a70..f9b473ee6711 100644 --- a/drivers/iio/adc/max1027.c +++ b/drivers/iio/adc/max1027.c @@ -466,6 +466,14 @@ static int max1027_probe(struct spi_device *spi) } } + /* Internal reset */ + st->reg = MAX1027_RST_REG; + ret = spi_write(st->spi, &st->reg, 1); + if (ret < 0) { + dev_err(&indio_dev->dev, "Failed to reset the ADC\n"); + return ret; + } + /* Disable averaging */ st->reg = MAX1027_AVG_REG; ret = spi_write(st->spi, &st->reg, 1); -- 2.20.1
next prev parent reply other threads:[~2019-10-02 12:30 UTC|newest] Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top 2019-10-02 12:30 [PATCH 0/7] Introduce max12xx ADC support Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal 2019-10-02 12:30 ` [PATCH 1/7] iio: adc: max1027: Add debugfs register read support Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal 2019-10-02 12:30 ` [PATCH 2/7] iio: adc: max1027: Make it optional to use interrupts Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal [this message] 2019-10-02 12:30 ` [PATCH 3/7] iio: adc: max1027: Reset the device at probe time Miquel Raynal 2019-10-02 12:30 ` [PATCH 4/7] iio: adc: max1027: Prepare the introduction of different resolutions Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal 2019-10-02 12:52 ` Miquel Raynal 2019-10-02 12:52 ` Miquel Raynal 2019-10-02 12:30 ` [PATCH 5/7] iio: adc: max1027: Introduce 12-bit devices support Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal 2019-10-02 12:30 ` [PATCH 6/7] dt-bindings: iio: adc: max1027: Mark interrupts as optional Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal 2019-10-02 12:30 ` [PATCH 7/7] dt-bindings: iio: adc: max1027: Document max12xx series compatibles Miquel Raynal 2019-10-02 12:30 ` Miquel Raynal
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