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--- a/drivers/spi/Kconfig
+++ b/drivers/spi/Kconfig
@@ -171,6 +171,13 @@ config SPI_CLPS711X
This enables dedicated general purpose SPI/Microwire1-compatible
master mode interface (SSI1) for CLPS711X-based CPUs.
+config SPI_CNS3XXX
+ tristate "CNS3XXX SPI controller"
+ depends on ARCH_CNS3XXX && SPI_MASTER
+ select SPI_BITBANG
+ help
+ This enables using the CNS3XXX SPI controller in master mode.
+
config SPI_COLDFIRE_QSPI
tristate "Freescale Coldfire QSPI controller"
depends on (M520x || M523x || M5249 || M525x || M527x || M528x || M532x)
--- a/drivers/spi/Makefile
+++ b/drivers/spi/Makefile
@@ -25,6 +25,7 @@ obj-$(CONFIG_SPI_BITBANG) += spi-bitban
obj-$(CONFIG_SPI_BUTTERFLY) += spi-butterfly.o
obj-$(CONFIG_SPI_CADENCE) += spi-cadence.o
obj-$(CONFIG_SPI_CLPS711X) += spi-clps711x.o
+obj-$(CONFIG_SPI_CNS3XXX) += spi-cns3xxx.o
obj-$(CONFIG_SPI_COLDFIRE_QSPI) += spi-coldfire-qspi.o
obj-$(CONFIG_SPI_DAVINCI) += spi-davinci.o
obj-$(CONFIG_SPI_DESIGNWARE) += spi-dw.o
--- a/drivers/spi/spi-bitbang.c
+++ b/drivers/spi/spi-bitbang.c
@@ -332,6 +332,10 @@ static int spi_bitbang_transfer_one(stru
*/
if (!m->is_dma_mapped)
t->rx_dma = t->tx_dma = 0;
+
+ t->last_in_message_list =
+ list_is_last(&t->transfer_list, &m->transfers);
+
status = bitbang->txrx_bufs(spi, t);
}
if (status > 0)
--- a/include/linux/spi/spi.h
+++ b/include/linux/spi/spi.h
@@ -628,6 +628,13 @@ struct spi_transfer {
u32 speed_hz;
struct list_head transfer_list;
+
+#ifdef CONFIG_ARCH_CNS3XXX
+ unsigned last_in_message_list;
+#ifdef CONFIG_SPI_CNS3XXX_2IOREAD
+ u8 dio_read;
+#endif
+#endif
};
/**
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