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spi: spi-nxp-fspi: Add the DDR LUT command support

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For DTR mode, flexspi need to use DDR LUT command, flexspi will switch
to DDR mode when detect the DDR LUT command.

Reviewed-by: Frank Li <Frank.Li@nxp.com>
Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
Link: https://patch.msgid.link/20250917-flexspi-ddr-v2-3-bb9fe2a01889@nxp.com
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Haibo Chen 2025-09-17 15:27:08 +08:00 committed by Mark Brown
parent a9888b3222
commit 3c1000e15f
No known key found for this signature in database
GPG Key ID: 24D68B725D5487D0
1 changed files with 15 additions and 5 deletions
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20
drivers/spi/spi-nxp-fspi.c
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@ -559,12 +559,21 @@ static void nxp_fspi_prepare_lut(struct nxp_fspi *f,
u32 target_lut_reg;
/* cmd */
lutval[0] |= LUT_DEF(0, LUT_CMD, LUT_PAD(op->cmd.buswidth),
op->cmd.opcode);
if (op->cmd.dtr) {
lutval[0] |= LUT_DEF(0, LUT_CMD_DDR, LUT_PAD(op->cmd.buswidth),
op->cmd.opcode >> 8);
lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_CMD_DDR,
LUT_PAD(op->cmd.buswidth),
op->cmd.opcode & 0xFF);
lutidx++;
} else {
lutval[0] |= LUT_DEF(0, LUT_CMD, LUT_PAD(op->cmd.buswidth),
op->cmd.opcode);
}
/* addr bytes */
if (op->addr.nbytes) {
lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_ADDR,
lutval[lutidx / 2] |= LUT_DEF(lutidx, op->addr.dtr ? LUT_ADDR_DDR : LUT_ADDR,
LUT_PAD(op->addr.buswidth),
op->addr.nbytes * 8);
lutidx++;
@ -572,7 +581,7 @@ static void nxp_fspi_prepare_lut(struct nxp_fspi *f,
/* dummy bytes, if needed */
if (op->dummy.nbytes) {
lutval[lutidx / 2] |= LUT_DEF(lutidx, LUT_DUMMY,
lutval[lutidx / 2] |= LUT_DEF(lutidx, op->dummy.dtr ? LUT_DUMMY_DDR : LUT_DUMMY,
/*
* Due to FlexSPI controller limitation number of PAD for dummy
* buswidth needs to be programmed as equal to data buswidth.
@ -587,7 +596,8 @@ static void nxp_fspi_prepare_lut(struct nxp_fspi *f,
if (op->data.nbytes) {
lutval[lutidx / 2] |= LUT_DEF(lutidx,
op->data.dir == SPI_MEM_DATA_IN ?
LUT_NXP_READ : LUT_NXP_WRITE,
(op->data.dtr ? LUT_READ_DDR : LUT_NXP_READ) :
(op->data.dtr ? LUT_WRITE_DDR : LUT_NXP_WRITE),
LUT_PAD(op->data.buswidth),
0);
lutidx++;