spi: s3c64xx: added support for polling mode
The 64xx spi driver supports partial polling mode. Only the last chunk of the transfer length is transferred or recieved in polling mode. Some SoC's that adopt this controller might not have have dma interface. This patch adds support for complete polling mode and gives flexibity for the user to select poll/dma mode. Signed-off-by: Girish K S <ks.giri@samsung.com> Signed-off-by: Mark Brown <broonie@linaro.org>
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