US_OVRE_RXRDY_IRQS  452 drivers/spi/spi-at91-usart.c 	at91_usart_spi_writel(aus, IER, US_OVRE_RXRDY_IRQS);
US_OVRE_RXRDY_IRQS  464 drivers/spi/spi-at91-usart.c 	at91_usart_spi_writel(aus, IDR, US_OVRE_RXRDY_IRQS);