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72 lines
2.4 KiB
72 lines
2.4 KiB
From c501cdf57682265b72a8180c06e4a01dc2978375 Mon Sep 17 00:00:00 2001
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From: Yunhui Cui <B56489@freescale.com>
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Date: Mon, 1 Feb 2016 18:26:23 +0800
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Subject: [PATCH 099/113] mtd:spi-nor:fsl-quadspi:Add fast-read mode support
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The qspi driver add generic fast-read mode for different
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flash venders. There are some different board flash work on
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different mode, such fast-read, quad-mode.
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So we have to modify the third entrace parameter of spi_nor_scan().
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Signed-off-by: Yunhui Cui <B56489@freescale.com>
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---
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drivers/mtd/spi-nor/fsl-quadspi.c | 27 +++++++++++++++++++++------
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1 file changed, 21 insertions(+), 6 deletions(-)
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--- a/drivers/mtd/spi-nor/fsl-quadspi.c
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+++ b/drivers/mtd/spi-nor/fsl-quadspi.c
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@@ -389,11 +389,21 @@ static void fsl_qspi_init_lut(struct fsl
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/* Read */
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lut_base = SEQID_READ * 4;
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- qspi_writel(q, LUT0(CMD, PAD1, read_op) | LUT1(ADDR, PAD1, addrlen),
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- base + QUADSPI_LUT(lut_base));
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- qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
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- LUT1(FSL_READ, PAD4, rxfifo),
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- base + QUADSPI_LUT(lut_base + 1));
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+ if (nor->flash_read == SPI_NOR_FAST) {
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+ qspi_writel(q, LUT0(CMD, PAD1, read_op) |
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+ LUT1(ADDR, PAD1, addrlen),
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+ base + QUADSPI_LUT(lut_base));
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+ qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
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+ LUT1(FSL_READ, PAD1, rxfifo),
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+ base + QUADSPI_LUT(lut_base + 1));
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+ } else if (nor->flash_read == SPI_NOR_QUAD) {
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+ qspi_writel(q, LUT0(CMD, PAD1, read_op) |
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+ LUT1(ADDR, PAD1, addrlen),
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+ base + QUADSPI_LUT(lut_base));
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+ qspi_writel(q, LUT0(DUMMY, PAD1, read_dm) |
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+ LUT1(FSL_READ, PAD4, rxfifo),
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+ base + QUADSPI_LUT(lut_base + 1));
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+ }
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/* Write enable */
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lut_base = SEQID_WREN * 4;
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@@ -468,6 +478,7 @@ static int fsl_qspi_get_seqid(struct fsl
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{
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switch (cmd) {
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case SPINOR_OP_READ_1_1_4:
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+ case SPINOR_OP_READ_FAST:
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return SEQID_READ;
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case SPINOR_OP_WREN:
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return SEQID_WREN;
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@@ -964,6 +975,7 @@ static int fsl_qspi_probe(struct platfor
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struct spi_nor *nor;
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struct mtd_info *mtd;
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int ret, i = 0;
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+ enum read_mode mode = SPI_NOR_QUAD;
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q = devm_kzalloc(dev, sizeof(*q), GFP_KERNEL);
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if (!q)
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@@ -1065,7 +1077,10 @@ static int fsl_qspi_probe(struct platfor
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/* set the chip address for READID */
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fsl_qspi_set_base_addr(q, nor);
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- ret = spi_nor_scan(nor, NULL, SPI_NOR_QUAD);
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+ ret = of_property_read_bool(np, "m25p,fast-read");
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+ mode = (ret) ? SPI_NOR_FAST : SPI_NOR_QUAD;
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+
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+ ret = spi_nor_scan(nor, NULL, mode);
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if (ret)
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goto mutex_failed;
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