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ramips: fix support for MX25L25635F flash

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Patch picked from commit 82618062cf

This enables 4B opcodes for MX25L25635F, to fix the reboot crash
issue (FS#1120) At least 3 devices are using this flash
- GeHua GHL-R-001
- Youku YK1
- Newifi D1

Now the MX25L25635F can be correctly detected without breaking MX25L25635E
[ 3.034324] spi-mt7621 1e000b00.spi: sys_freq: 220000000
[ 3.045962] m25p80 spi0.0: mx25l25635f (32768 Kbytes)
[ 3.056098] 4 fixed-partitions partitions found on MTD device spi0.0
[ 3.068748] Creating 4 MTD partitions on "spi0.0":

Signed-off-by: Deng Qingfang <dengqf6@mail2.sysu.edu.cn>
Signed-off-by: Christian Lamparter <chunkeey@gmail.com> [added deprecation notice]
v19.07.3_mercusys_ac12_duma
Deng Qingfang 5 years ago committed by Christian Lamparter
parent b368373fab
commit c2bcdabf2a
4 changed files with 80 additions and 6 deletions
Show Stats Download Patch File Download Diff File

3
target/linux/ramips/dts/GHL-R-001.dts
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@ -55,9 +55,10 @@
status = "okay";
flash@0 {
compatible = "jedec,spi-nor";
compatible = "mx25l25635f", "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <25000000>;
m25p,fast-read;
partitions {
compatible = "fixed-partitions";

6
target/linux/ramips/dts/Newifi-D1.dts
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@ -82,10 +82,10 @@
status = "okay";
m25p80@0 {
compatible = "jedec,spi-nor";
compatible = "mx25l25635f", "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <10000000>;
m25p,chunked-io = <32>;
spi-max-frequency = <25000000>;
m25p,fast-read;
partitions {
compatible = "fixed-partitions";

5
target/linux/ramips/dts/YOUKU-YK1.dts
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@ -69,9 +69,10 @@
status = "okay";
m25p80@0 {
compatible = "jedec,spi-nor";
compatible = "mx25l25635f", "jedec,spi-nor";
reg = <0>;
spi-max-frequency = <10000000>;
spi-max-frequency = <25000000>;
m25p,fast-read;
partitions {
compatible = "fixed-partitions";

72
target/linux/ramips/patches-4.14/304-spi-nor-enable-4B-opcodes-for-mx25l25635f.patch
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@ -0,0 +1,72 @@
This hack can be dropped after the next stable release from
v5.x-tree.
The problem was fixed upstream by
commit 2bffa65da43e ("mtd: spi-nor: Add a post BFPT fixup for MX25L25635E")
For reference see:
<https://github.com/openwrt/openwrt/pull/1743>
--- a/drivers/mtd/spi-nor/spi-nor.c
+++ b/drivers/mtd/spi-nor/spi-nor.c
@@ -1098,6 +1098,7 @@ static const struct flash_info spi_nor_i
{ "mx25l12805d", INFO(0xc22018, 0, 64 * 1024, 256, 0) },
{ "mx25l12855e", INFO(0xc22618, 0, 64 * 1024, 256, 0) },
{ "mx25l25635e", INFO(0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ) },
+ { "mx25l25635f", INFO(0xc22019, 0, 64 * 1024, 512, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
{ "mx25u25635f", INFO(0xc22539, 0, 64 * 1024, 512, SECT_4K | SPI_NOR_4B_OPCODES) },
{ "mx25l25655e", INFO(0xc22619, 0, 64 * 1024, 512, 0) },
{ "mx66l51235l", INFO(0xc2201a, 0, 64 * 1024, 1024, SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ | SPI_NOR_4B_OPCODES) },
@@ -1267,11 +1268,12 @@ static const struct flash_info spi_nor_i
{ },
};
-static const struct flash_info *spi_nor_read_id(struct spi_nor *nor)
+static const struct flash_info *spi_nor_read_id(struct spi_nor *nor,
+ const char *name)
{
int tmp;
u8 id[SPI_NOR_MAX_ID_LEN];
- const struct flash_info *info;
+ const struct flash_info *info, *first_match = NULL;
tmp = nor->read_reg(nor, SPINOR_OP_RDID, id, SPI_NOR_MAX_ID_LEN);
if (tmp < 0) {
@@ -1282,10 +1284,16 @@ static const struct flash_info *spi_nor_
for (tmp = 0; tmp < ARRAY_SIZE(spi_nor_ids) - 1; tmp++) {
info = &spi_nor_ids[tmp];
if (info->id_len) {
- if (!memcmp(info->id, id, info->id_len))
- return &spi_nor_ids[tmp];
+ if (!memcmp(info->id, id, info->id_len)) {
+ if (!name || !strcmp(name, info->name))
+ return info;
+ if (!first_match)
+ first_match = info;
+ }
}
}
+ if (first_match)
+ return first_match;
dev_err(nor->dev, "unrecognized JEDEC id bytes: %02x, %02x, %02x\n",
id[0], id[1], id[2]);
return ERR_PTR(-ENODEV);
@@ -2765,7 +2773,7 @@ int spi_nor_scan(struct spi_nor *nor, co
info = spi_nor_match_id(name);
/* Try to auto-detect if chip name wasn't specified or not found */
if (!info)
- info = spi_nor_read_id(nor);
+ info = spi_nor_read_id(nor, NULL);
if (IS_ERR_OR_NULL(info))
return -ENOENT;
@@ -2776,7 +2784,7 @@ int spi_nor_scan(struct spi_nor *nor, co
if (name && info->id_len) {
const struct flash_info *jinfo;
- jinfo = spi_nor_read_id(nor);
+ jinfo = spi_nor_read_id(nor, name);
if (IS_ERR(jinfo)) {
return PTR_ERR(jinfo);
} else if (jinfo != info) {
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