iio: adc: ad7124: Enable internal reference
commit5.4-rM2-2.2.x-imx-squashed11d7c8d3b1
upstream. When the internal reference was selected by a channel it was not enabled. This patch fixes that and enables it. Fixes:b3af341bbd
("iio: adc: Add ad7124 support") Signed-off-by: Mircea Caprioru <mircea.caprioru@analog.com> Cc: <Stable@vger.kernel.org> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
parent
187e07d991
commit
991fd95e5f
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@ -39,6 +39,8 @@
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#define AD7124_STATUS_POR_FLAG_MSK BIT(4)
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/* AD7124_ADC_CONTROL */
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#define AD7124_ADC_CTRL_REF_EN_MSK BIT(8)
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#define AD7124_ADC_CTRL_REF_EN(x) FIELD_PREP(AD7124_ADC_CTRL_REF_EN_MSK, x)
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#define AD7124_ADC_CTRL_PWR_MSK GENMASK(7, 6)
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#define AD7124_ADC_CTRL_PWR(x) FIELD_PREP(AD7124_ADC_CTRL_PWR_MSK, x)
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#define AD7124_ADC_CTRL_MODE_MSK GENMASK(5, 2)
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@ -424,7 +426,10 @@ static int ad7124_init_channel_vref(struct ad7124_state *st,
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break;
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case AD7124_INT_REF:
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st->channel_config[channel_number].vref_mv = 2500;
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break;
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st->adc_control &= ~AD7124_ADC_CTRL_REF_EN_MSK;
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st->adc_control |= AD7124_ADC_CTRL_REF_EN(1);
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return ad_sd_write_reg(&st->sd, AD7124_ADC_CONTROL,
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2, st->adc_control);
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default:
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dev_err(&st->sd.spi->dev, "Invalid reference %d\n", refsel);
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return -EINVAL;
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