f_per 1160 drivers/iio/adc/at91-sama5d2_adc.c unsigned f_per, prescal, startup, mr; f_per 1162 drivers/iio/adc/at91-sama5d2_adc.c f_per = clk_get_rate(st->per_clk); f_per 1163 drivers/iio/adc/at91-sama5d2_adc.c prescal = (f_per / (2 * freq)) - 1;