[PATCH v3 3/4] mtd: spi-nor: fsl-quadspi: add fast-read mode support

[Yunhui Cui]

From: Yunhui Cui <yunhui....@nxp.com>

The qspi driver add generic fast-read mode for different
flash venders. There are some different board flash work on
different mode, such fast-read, quad-mode.

Signed-off-by: Yunhui Cui <yunhui....@nxp.com>
---
 drivers/mtd/spi-nor/fsl-quadspi.c | 21 ++++++++++++++++-----
 1 file changed, 16 insertions(+), 5 deletions(-)

diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c 
b/drivers/mtd/spi-nor/fsl-quadspi.c
index 9861290..09adaa4 100644
--- a/drivers/mtd/spi-nor/fsl-quadspi.c
+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
@@ -389,11 +389,21 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q)
        /* Read */
        lut_base = SEQID_READ * 4;
 
-       qspi_writel(q, LUT0(CMD, PAD1, read_op) | LUT1(ADDR, PAD1, addrlen),
-                       base + QUADSPI_LUT(lut_base));
-       qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
-                   LUT1(FSL_READ, PAD4, rxfifo),
-                       base + QUADSPI_LUT(lut_base + 1));
+       if (nor->flash_read == SPI_NOR_FAST) {
+               qspi_writel(q, LUT0(CMD, PAD1, read_op) |
+                           LUT1(ADDR, PAD1, addrlen),
+                               base + QUADSPI_LUT(lut_base));
+               qspi_writel(q,  LUT0(DUMMY, PAD1, read_dm) |
+                           LUT1(FSL_READ, PAD1, rxfifo),
+                               base + QUADSPI_LUT(lut_base + 1));
+       } else if (nor->flash_read == SPI_NOR_QUAD) {
+               qspi_writel(q, LUT0(CMD, PAD1, read_op) |
+                           LUT1(ADDR, PAD1, addrlen),
+                               base + QUADSPI_LUT(lut_base));
+               qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
+                           LUT1(FSL_READ, PAD4, rxfifo),
+                               base + QUADSPI_LUT(lut_base + 1));
+       }
 
        /* Write enable */
        lut_base = SEQID_WREN * 4;
@@ -468,6 +478,7 @@ static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd)
 {
        switch (cmd) {
        case SPINOR_OP_READ_1_1_4:
+       case SPINOR_OP_READ_FAST:
                return SEQID_READ;
        case SPINOR_OP_WREN:
                return SEQID_WREN;
-- 
2.1.0.27.g96db324