This commit adds LUT sequence to perform DUAL read (as opposite to the default QUAD for this controller).
Signed-off-by: Lukasz Majewski <[email protected]> --- drivers/mtd/spi-nor/fsl-quadspi.c | 12 ++++++++++++ 1 file changed, 12 insertions(+) diff --git a/drivers/mtd/spi-nor/fsl-quadspi.c b/drivers/mtd/spi-nor/fsl-quadspi.c index 4f0c78ba6fcb..0c381cdfb39f 100644 --- a/drivers/mtd/spi-nor/fsl-quadspi.c +++ b/drivers/mtd/spi-nor/fsl-quadspi.c @@ -207,6 +207,7 @@ #define SEQID_RDCR 9 #define SEQID_EN4B 10 #define SEQID_BRWR 11 +#define SEQID_DUAL_READ 12 #define QUADSPI_MIN_IOMAP SZ_4M @@ -482,6 +483,15 @@ static void fsl_qspi_init_lut(struct fsl_qspi *q) qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_BRWR), base + QUADSPI_LUT(lut_base)); + /* Dual Read */ + lut_base = SEQID_DUAL_READ * 4; + + qspi_writel(q, LUT0(CMD, PAD1, SPINOR_OP_READ_1_1_2) | + LUT1(ADDR, PAD1, addrlen), base + QUADSPI_LUT(lut_base)); + qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) | + LUT1(FSL_READ, PAD2, rxfifo), + base + QUADSPI_LUT(lut_base + 1)); + fsl_qspi_lock_lut(q); } @@ -513,6 +523,8 @@ static int fsl_qspi_get_seqid(struct fsl_qspi *q, u8 cmd) return SEQID_EN4B; case SPINOR_OP_BRWR: return SEQID_BRWR; + case SPINOR_OP_READ_1_1_2: + return SEQID_DUAL_READ; default: if (cmd == q->nor[0].erase_opcode) return SEQID_SE; -- 2.11.0
