iio: adc: select triggered buffer for sama5d2 adc
Without the triggered buffer code, we get a link error: drivers/iio/adc/at91-sama5d2_adc.o: In function `at91_adc_probe': at91-sama5d2_adc.c:(.text+0x938): undefined reference to `devm_iio_triggered_buffer_setup' This adds a Kconfig 'select' statement like other ADC drivers have it already. Fixes: 5e1a1da0 ("iio: adc: at91-sama5d2_adc: add hw trigger and buffer support") Signed-off-by: NArnd Bergmann <arnd@arndb.de> Signed-off-by: NJonathan Cameron <Jonathan.Cameron@huawei.com>
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