Unverified Commit 3c1000e1 authored by Haibo Chen's avatar Haibo Chen Committed by Mark Brown
Browse files

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



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

Reviewed-by: default avatarFrank Li <Frank.Li@nxp.com>
Signed-off-by: default avatarHaibo Chen <haibo.chen@nxp.com>
Link: https://patch.msgid.link/20250917-flexspi-ddr-v2-3-bb9fe2a01889@nxp.com


Signed-off-by: default avatarMark Brown <broonie@kernel.org>
parent a9888b32

drivers/spi/spi-nxp-fspi.c

+15 −5
Original line number Diff line number Diff line
@@ -559,12 +559,21 @@ static void nxp_fspi_prepare_lut(struct nxp_fspi *f, 
	u32 target_lut_reg;



	/* cmd */

	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++;