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Commit b455c846 authored by Rui Miguel Silva's avatar Rui Miguel Silva Committed by Greg Kroah-Hartman
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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: default avatarRui Miguel Silva <rui.silva@linaro.org>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@google.com>
parent 3e48acac

drivers/staging/greybus/greybus_protocols.h

+3 −0
Original line number Diff line number Diff line
@@ -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 {

drivers/staging/greybus/spi.c

+4 −1
Original line number Diff line number Diff line
@@ -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;