diff options
Diffstat (limited to 'drivers/spi/spi-mem.c')
| -rw-r--r-- | drivers/spi/spi-mem.c | 23 |
1 files changed, 20 insertions, 3 deletions
diff --git a/drivers/spi/spi-mem.c b/drivers/spi/spi-mem.c index f3a3f196e628..dc713b0c3c4d 100644 --- a/drivers/spi/spi-mem.c +++ b/drivers/spi/spi-mem.c @@ -137,8 +137,8 @@ static int spi_check_buswidth_req(struct spi_mem *mem, u8 buswidth, bool tx) return -ENOTSUPP; } -bool spi_mem_default_supports_op(struct spi_mem *mem, - const struct spi_mem_op *op) +static bool spi_mem_check_buswidth(struct spi_mem *mem, + const struct spi_mem_op *op) { if (spi_check_buswidth_req(mem, op->cmd.buswidth, true)) return false; @@ -156,13 +156,29 @@ bool spi_mem_default_supports_op(struct spi_mem *mem, op->data.dir == SPI_MEM_DATA_OUT)) return false; + return true; +} + +bool spi_mem_dtr_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ + if (op->cmd.nbytes != 2) + return false; + + return spi_mem_check_buswidth(mem, op); +} +EXPORT_SYMBOL_GPL(spi_mem_dtr_supports_op); + +bool spi_mem_default_supports_op(struct spi_mem *mem, + const struct spi_mem_op *op) +{ if (op->cmd.dtr || op->addr.dtr || op->dummy.dtr || op->data.dtr) return false; if (op->cmd.nbytes != 1) return false; - return true; + return spi_mem_check_buswidth(mem, op); } EXPORT_SYMBOL_GPL(spi_mem_default_supports_op); @@ -354,6 +370,7 @@ int spi_mem_exec_op(struct spi_mem *mem, const struct spi_mem_op *op) xfers[xferpos].tx_buf = tmpbuf + op->addr.nbytes + 1; xfers[xferpos].len = op->dummy.nbytes; xfers[xferpos].tx_nbits = op->dummy.buswidth; + xfers[xferpos].dummy_data = 1; spi_message_add_tail(&xfers[xferpos], &msg); xferpos++; totalxferlen += op->dummy.nbytes; |