iio: adc: meson-saradc: initialize the bandgap correctly on older SoCs

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commit d85eed9f57 upstream.

Meson8 and Meson8b do not have the MESON_SAR_ADC_REG11 register. The
bandgap setting for these SoCs is configured in the
MESON_SAR_ADC_DELTA_10 register instead.
Make the driver aware of this difference and use the correct bandgap
register depending on the SoC.
This has worked fine on Meson8 and Meson8b because the bootloader is
already initializing the bandgap setting.

Fixes: 6c76ed31cd ("iio: adc: meson-saradc: add Meson8b SoC compatibility")
Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com>
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

...

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Martin Blumenstingl 2017-10-31 21:01:44 +01:00 • committed by Greg Kroah-Hartman

parent ac2d783880

commit b6c6d01a2d

1 changed files with 26 additions and 7 deletions

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drivers/iio/adc/meson_saradc.c

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