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Currently we are initializing the SPI controller in the chip select line function, and that function is called once for each SPI device on the bus. If a board has multiple SPI devices, the controller will be initialized multiple times. Introduce ath79_spi_{en,dis}able helper functions, and call those from probe/response in order to avoid the mutliple initialization of the controller. Signed-off-by: Gabor Juhos <juhosg@openwrt.org> Signed-off-by: Grant Likely <grant.likely@secretlab.ca>
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