iio: adc: ad7124: reduce the number of SPI transfers

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The ad7124_init_config_vref() function writes the AD7124_ADC_CONTROL
register for each channel that is configured to use the internal
reference.

The ad7124_write_config()function performs 7 SPI transfers for
configuring 2 registers: config_x and filter_x.

Reduce the number of SPI transfers:
-during the probe by only setting the st->adc_control value in
 ad7124_init_config_vref() and writing to the device only at the end of
 ad7124_setup().
-in ad7124_write_config() by grouping writes to the same register.

Signed-off-by: Dumitru Ceclan <dumitru.ceclan@analog.com>
Reviewed-by: Nuno Sa <nuno.sa@analog.com>
Link: https://patch.msgid.link/20240731-ad7124-fix-v1-3-46a76aa4b9be@analog.com
Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>

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Dumitru Ceclan 2024-07-31 15:37:24 +03:00 • committed by Jonathan Cameron

parent 13fad2607d

commit b7eef979b7

1 changed files with 12 additions and 19 deletions

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drivers/iio/adc/ad7124.c

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