beginning of SPI support

1 files changed, 35 insertions, 0 deletions

diff --git a/include/spi/spi.h b/include/spi/spi.h
new file mode 100644
index 0000000000..2811efce66
--- /dev/null
+++ b/include/spi/spi.h
@@ -0,0 +1,35 @@
+#ifndef __INCLUDE_SPI_H
+#define __INCLUDE_SPI_H
+
+struct spi_board_info {
+	char	*name;
+	int 	max_speed_hz;
+	int	bus_num;
+	int	chip_select;
+};
+
+struct spi_master {
+};
+
+struct spi_transfer {
+	/* it's ok if tx_buf == rx_buf (right?)
+	 * for MicroWire, one buffer must be null
+	 * buffers must work with dma_*map_single() calls, unless
+	 *   spi_message.is_dma_mapped reports a pre-existing mapping
+	 */
+	const void	*tx_buf;
+	void		*rx_buf;
+	unsigned	len;
+
+	unsigned	cs_change:1;
+	u8		bits_per_word;
+	u16		delay_usecs;
+	u32		speed_hz;
+
+	struct list_head transfer_list;
+};
+
+int spi_register_boardinfo(struct spi_board_info *info, int num);
+int spi_register_master(struct spi_master *master);
+
+#endif /* __INCLUDE_SPI_H */