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spi: s3c64xx: consider the case when the CS line is not connected

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When the CS line is not connected, it is not needed to enable or
disable the chip selection functionality from the s3c64xx
devices in order to perform a transfer.
Set the CS controller logically always enabled already during
initialization (by writing '0' in the S3C64XX_SPI_SLAVE_SEL
register) and never disable it.

Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Andi Shyti
2016-06-28 11:41:12 +09:00
committed by Mark Brown
parent aa4964c4eb
commit a92e7c3d82
3 changed files with 12 additions and 1 deletions
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include/linux/platform_data/spi-s3c64xx.h
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@@ -38,6 +38,7 @@ struct s3c64xx_spi_csinfo {
struct s3c64xx_spi_info {
int src_clk_nr;
int num_cs;
bool no_cs;
int (*cfg_gpio)(void);
dma_filter_fn filter;
void *dma_tx;