diff options
| author | Rui Miguel Silva <rui.silva@linaro.org> | 2015-12-02 11:12:27 +0000 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@google.com> | 2015-12-02 17:04:58 -0800 |
| commit | b455c84655d5bdfc5157d2100279e3ff2454b596 (patch) | |
| tree | 88ca8d32b1202c79400a9eb06569e9f61424f33b /drivers | |
| parent | 3e48acac26c8b5321ff5b752c8650e1cf4d04344 (diff) | |
greybus: spi: add rdwr field to transfer descriptor
Add read and/or write field to transfer descriptor to make it possible
to identify the type of transfer.
Signed-off-by: Rui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@google.com>
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/staging/greybus/greybus_protocols.h | 3 | ||||
| -rw-r--r-- | drivers/staging/greybus/spi.c | 5 |
2 files changed, 7 insertions, 1 deletions
diff --git a/drivers/staging/greybus/greybus_protocols.h b/drivers/staging/greybus/greybus_protocols.h index 00593b0a3597..23d4cce8b727 100644 --- a/drivers/staging/greybus/greybus_protocols.h +++ b/drivers/staging/greybus/greybus_protocols.h @@ -695,6 +695,9 @@ struct gb_spi_transfer { __le16 delay_usecs; __u8 cs_change; __u8 bits_per_word; + __u8 rdwr; +#define GB_SPI_XFER_READ 0x01 +#define GB_SPI_XFER_WRITE 0x02 } __packed; struct gb_spi_transfer_request { diff --git a/drivers/staging/greybus/spi.c b/drivers/staging/greybus/spi.c index 33e86f9c3182..1b9c97336451 100644 --- a/drivers/staging/greybus/spi.c +++ b/drivers/staging/greybus/spi.c @@ -107,13 +107,16 @@ gb_spi_operation_create(struct gb_connection *connection, gb_xfer->delay_usecs = cpu_to_le16(xfer->delay_usecs); gb_xfer->cs_change = xfer->cs_change; gb_xfer->bits_per_word = xfer->bits_per_word; - gb_xfer++; /* Copy tx data */ if (xfer->tx_buf) { memcpy(tx_data, xfer->tx_buf, xfer->len); tx_data += xfer->len; + gb_xfer->rdwr |= GB_SPI_XFER_WRITE; } + if (xfer->rx_buf) + gb_xfer->rdwr |= GB_SPI_XFER_READ; + gb_xfer++; } return operation; |