aboutsummaryrefslogtreecommitdiff
path: root/src/drivers/spi/spi-generic.c
diff options
context:
space:
mode:
Diffstat (limited to 'src/drivers/spi/spi-generic.c')
-rw-r--r--src/drivers/spi/spi-generic.c53
1 files changed, 0 insertions, 53 deletions
diff --git a/src/drivers/spi/spi-generic.c b/src/drivers/spi/spi-generic.c
index 1fcc05d4f3..6d7fcdc021 100644
--- a/src/drivers/spi/spi-generic.c
+++ b/src/drivers/spi/spi-generic.c
@@ -146,56 +146,3 @@ int spi_setup_slave(unsigned int bus, unsigned int cs, struct spi_slave *slave)
return 0;
}
-
-static int spi_xfer_combine_two_vectors(const struct spi_slave *slave,
- struct spi_op *v1, struct spi_op *v2)
-{
- struct spi_op op = {
- .dout = v1->dout, .bytesout = v1->bytesout,
- .din = v2->din, .bytesin = v2->bytesin,
- };
- int ret;
-
- /*
- * Combine two vectors only if:
- * v1 has non-NULL dout and NULL din and
- * v2 has non-NULL din and NULL dout and
- *
- * In all other cases, do not combine the two vectors.
- */
- if ((!v1->dout || v1->din) || (v2->dout || !v2->din))
- return -1;
-
- ret = spi_xfer_single_op(slave, &op);
- v1->status = v2->status = op.status;
-
- return ret;
-}
-
-/*
- * Helper function to allow chipsets to combine two vectors if possible. This
- * function can only handle upto 2 vectors.
- *
- * Two vectors are combined if first vector has a non-NULL dout and NULL din and
- * second vector has a non-NULL din and NULL dout. Otherwise, each vector is
- * operated upon one at a time.
- *
- * Returns 0 on success and non-zero on failure.
- */
-int spi_xfer_two_vectors(const struct spi_slave *slave,
- struct spi_op vectors[], size_t count)
-{
- int ret;
-
- assert (count <= 2);
-
- if (count == 2) {
- ret = spi_xfer_combine_two_vectors(slave, &vectors[0],
- &vectors[1]);
-
- if (!ret || (vectors[0].status != SPI_OP_NOT_EXECUTED))
- return ret;
- }
-
- return spi_xfer_vector_default(slave, vectors, count);
-}