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| author | Miquel Raynal <miquel.raynal@bootlin.com> | 2026-04-10 20:41:02 +0300 |
|---|---|---|
| committer | Mark Brown <broonie@kernel.org> | 2026-04-11 13:53:54 +0300 |
| commit | f79ee9e4b23244e77b28d176ce99a2d84d813ac5 (patch) | |
| tree | 426a2b5160a2bed392a1aed13e9eeae2e1957c99 | |
| parent | 5e75c1d4d386fb7d64e2b19355e4d38dd4fd8845 (diff) | |
| download | linux-f79ee9e4b23244e77b28d176ce99a2d84d813ac5.tar.xz | |
spi: spi-mem: Add a packed command operation
Instead of repeating the command opcode twice, some flash devices try to
pack command and address bits. In this case, the second opcode byte
being sent (LSB) is free to be used. The input data must be ANDed to
only provide the relevant bits.
Signed-off-by: Miquel Raynal <miquel.raynal@bootlin.com>
Link: https://patch.msgid.link/20260410-winbond-6-19-rc1-oddr-v1-2-2ac4827a3868@bootlin.com
Signed-off-by: Mark Brown <broonie@kernel.org>
| -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 37f709784350..c8e207522223 100644 --- a/include/linux/spi/spi-mem.h +++ b/include/linux/spi/spi-mem.h @@ -28,6 +28,14 @@ .dtr = true, \ } +#define SPI_MEM_DTR_OP_PACKED_CMD(__opcode, __addr, __buswidth) \ + { \ + .nbytes = 2, \ + .opcode = __opcode << 8 | __addr, \ + .buswidth = __buswidth, \ + .dtr = true, \ + } + #define SPI_MEM_OP_ADDR(__nbytes, __val, __buswidth) \ { \ .nbytes = __nbytes, \ |