From: Mircea Caprioru <mircea.caprioru@analog.com>
To: <jic23@kernel.org>
Cc: <Michael.Hennerich@analog.com>, <stefan.popa@analog.com>,
<lars@metafoo.de>, <gregkh@linuxfoundation.org>,
<linux-kernel@vger.kernel.org>, <linux-iio@vger.kernel.org>,
Mircea Caprioru <mircea.caprioru@analog.com>
Subject: [PATCH] iio: adc: ad7124: Enable internal reference
Date: Thu, 14 Nov 2019 11:24:26 +0200 [thread overview]
Message-ID: <20191114092426.21631-1-mircea.caprioru@analog.com> (raw)
When the internal reference was selected by a channel it was not enabled.
This patch fixes that and enables it.
Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com>
---
drivers/iio/adc/ad7124.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/iio/adc/ad7124.c b/drivers/iio/adc/ad7124.c
index edc6f1cc90b2..3f03abf100b5 100644
--- a/drivers/iio/adc/ad7124.c
+++ b/drivers/iio/adc/ad7124.c
@@ -39,6 +39,8 @@
#define AD7124_STATUS_POR_FLAG_MSK BIT(4)
/* AD7124_ADC_CONTROL */
+#define AD7124_ADC_CTRL_REF_EN_MSK BIT(8)
+#define AD7124_ADC_CTRL_REF_EN(x) FIELD_PREP(AD7124_ADC_CTRL_REF_EN_MSK, x)
#define AD7124_ADC_CTRL_PWR_MSK GENMASK(7, 6)
#define AD7124_ADC_CTRL_PWR(x) FIELD_PREP(AD7124_ADC_CTRL_PWR_MSK, x)
#define AD7124_ADC_CTRL_MODE_MSK GENMASK(5, 2)
@@ -424,7 +426,10 @@ static int ad7124_init_channel_vref(struct ad7124_state *st,
break;
case AD7124_INT_REF:
st->channel_config[channel_number].vref_mv = 2500;
- break;
+ st->adc_control &= ~AD7124_ADC_CTRL_REF_EN_MSK;
+ st->adc_control |= AD7124_ADC_CTRL_REF_EN(1);
+ return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL,
+ 2, st->adc_control);
default:
dev_err(&st->sd.spi->dev, "Invalid reference %d\n", refsel);
return -EINVAL;
--
2.17.1
next reply other threads:[~2019-11-14 9:25 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-14 9:24 Mircea Caprioru [this message]
2019-11-16 16:26 ` [PATCH] iio: adc: ad7124: Enable internal reference Jonathan Cameron
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