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Subject[PATCH 03/11] spi: spi-nxp-fspi: add DTR mode support
Date
From: Haibo Chen <haibo.chen@nxp.com>

For LUT, add DTR command support.

Signed-off-by: Haibo Chen <haibo.chen@nxp.com>
---
drivers/spi/spi-nxp-fspi.c | 27 ++++++++++++++++++++++-----
1 file changed, 22 insertions(+), 5 deletions(-)

diff --git a/drivers/spi/spi-nxp-fspi.c b/drivers/spi/spi-nxp-fspi.c
index 10e71e55d21a..c32a4f53fa2a 100644
--- a/drivers/spi/spi-nxp-fspi.c
+++ b/drivers/spi/spi-nxp-fspi.c
@@ -537,12 +537,22 @@ static void nxp_fspi_prepare_lut(struct nxp_fspi *f,
int lutidx = 1, i;

/* 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 & 0x00ff);
+ 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++;
@@ -550,7 +560,8 @@ 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.
@@ -565,7 +576,8 @@ 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++;
@@ -1090,6 +1102,10 @@ static const struct spi_controller_mem_ops nxp_fspi_mem_ops = {
.get_name = nxp_fspi_get_name,
};

+static struct spi_controller_mem_caps nxp_fspi_mem_caps = {
+ .dtr = true,
+};
+
static int nxp_fspi_probe(struct platform_device *pdev)
{
struct spi_controller *ctlr;
@@ -1194,6 +1210,7 @@ static int nxp_fspi_probe(struct platform_device *pdev)
ctlr->bus_num = -1;
ctlr->num_chipselect = NXP_FSPI_MAX_CHIPSELECT;
ctlr->mem_ops = &nxp_fspi_mem_ops;
+ ctlr->mem_caps = &nxp_fspi_mem_caps;

nxp_fspi_default_setup(f);

--
2.25.1
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