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| author | Pratyush Yadav <p.yadav@ti.com> | 2020-06-24 00:00:14 +0530 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2020-07-14 17:29:37 +0100 |
| commit | 4c5e2bba30e49b970a0fd07b43e0b7a3b5fd5ea7 (patch) | |
| tree | 26f3159168133fdb63292c707deb896d6248631e /include/linux/spi/spi-mem.h | |
| parent | b3a9e3b9622ae10064826dccb4f7a52bd88c7407 (diff) | |
| download | lwn-4c5e2bba30e49b970a0fd07b43e0b7a3b5fd5ea7.tar.gz lwn-4c5e2bba30e49b970a0fd07b43e0b7a3b5fd5ea7.zip | |
spi: spi-mem: allow specifying whether an op is DTR or not
Each phase is given a separate 'dtr' field so mixed protocols like
4S-4D-4D can be supported.
Signed-off-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200623183030.26591-2-p.yadav@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Diffstat (limited to 'include/linux/spi/spi-mem.h')
| -rw-r--r-- | include/linux/spi/spi-mem.h | 8 |
1 files changed, 8 insertions, 0 deletions
diff --git a/include/linux/spi/spi-mem.h b/include/linux/spi/spi-mem.h index af9ff2f0f1b2..e3dcb956bf61 100644 --- a/include/linux/spi/spi-mem.h +++ b/include/linux/spi/spi-mem.h @@ -71,9 +71,11 @@ enum spi_mem_data_dir { * struct spi_mem_op - describes a SPI memory operation * @cmd.buswidth: number of IO lines used to transmit the command * @cmd.opcode: operation opcode + * @cmd.dtr: whether the command opcode should be sent in DTR mode or not * @addr.nbytes: number of address bytes to send. Can be zero if the operation * does not need to send an address * @addr.buswidth: number of IO lines used to transmit the address cycles + * @addr.dtr: whether the address should be sent in DTR mode or not * @addr.val: address value. This value is always sent MSB first on the bus. * Note that only @addr.nbytes are taken into account in this * address value, so users should make sure the value fits in the @@ -81,7 +83,9 @@ enum spi_mem_data_dir { * @dummy.nbytes: number of dummy bytes to send after an opcode or address. Can * be zero if the operation does not require dummy bytes * @dummy.buswidth: number of IO lanes used to transmit the dummy bytes + * @dummy.dtr: whether the dummy bytes should be sent in DTR mode or not * @data.buswidth: number of IO lanes used to send/receive the data + * @data.dtr: whether the data should be sent in DTR mode or not * @data.dir: direction of the transfer * @data.nbytes: number of data bytes to send/receive. Can be zero if the * operation does not involve transferring data @@ -91,22 +95,26 @@ enum spi_mem_data_dir { struct spi_mem_op { struct { u8 buswidth; + u8 dtr : 1; u8 opcode; } cmd; struct { u8 nbytes; u8 buswidth; + u8 dtr : 1; u64 val; } addr; struct { u8 nbytes; u8 buswidth; + u8 dtr : 1; } dummy; struct { u8 buswidth; + u8 dtr : 1; enum spi_mem_data_dir dir; unsigned int nbytes; union { |