Add the chip select glue.

2 files changed, 6 insertions, 0 deletions

diff --git a/sys/dev/spibus/spi.h b/sys/dev/spibus/spi.h
index 663f5ff..4f89e94 100644
--- a/sys/dev/spibus/spi.h
+++ b/sys/dev/spibus/spi.h
@@ -1,6 +1,7 @@
 /* $FreeBSD$ */
 
 struct spi_command {
+	int	cs;
 	void	*tx_cmd;
 	uint32_t tx_cmd_sz;
 	void	*rx_cmd;
@@ -10,3 +11,5 @@ struct spi_command {
 	void	*rx_data;
 	uint32_t rx_data_sz;
 };
+
+#define	SPI_CHIP_SELECT_HIGH	0x1		/* Chip select high (else low) */
diff --git a/sys/dev/spibus/spibus.c b/sys/dev/spibus/spibus.c
index 43b4e7e..0f8e359 100644
--- a/sys/dev/spibus/spibus.c
+++ b/sys/dev/spibus/spibus.c
@@ -158,6 +158,9 @@ spibus_hinted_child(device_t bus, const char *dname, int dunit)
 static int
 spibus_transfer_impl(device_t dev, device_t child, struct spi_command *cmd)
 {
+	/* Maybe set flags too? spi mode? */
+	spibus_get_cs(dev, &cmd->cs);
+
 	return (SPIBUS_TRANSFER(device_get_parent(dev), child, cmd));
 }