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iio:adc:ad799x: Add helper function to read/write config register
16-bit on ad7997/ad7998, 8-bit elsewhere Signed-off-by: Peter Meerwald <pmeerw@pmeerw.net> Acked-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Jonathan Cameron <jic23@kernel.org>
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@ -136,6 +136,30 @@ struct ad799x_state {
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unsigned int transfer_size;
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};
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static int ad799x_write_config(struct ad799x_state *st, u16 val)
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{
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switch (st->id) {
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case ad7997:
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case ad7998:
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return i2c_smbus_write_word_swapped(st->client, AD7998_CONF_REG,
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val);
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default:
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return i2c_smbus_write_byte_data(st->client, AD7998_CONF_REG,
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val);
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}
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}
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static int ad799x_read_config(struct ad799x_state *st)
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{
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switch (st->id) {
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case ad7997:
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case ad7998:
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return i2c_smbus_read_word_swapped(st->client, AD7998_CONF_REG);
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default:
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return i2c_smbus_read_byte_data(st->client, AD7998_CONF_REG);
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}
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}
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/**
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* ad799x_trigger_handler() bh of trigger launched polling to ring buffer
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*
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