[PATCH v3 2/2] mtd: spi-nor: micron-st: Add support for mt25qu01g

[Fabio Estevam]

From: Fabio Estevam <festevam at denx.de>

Add support for the MT25QU01G 128MB Micron Serial NOR Flash Memory
model.

Datasheet:
https://www.micron.com/-/media/client/global/documents/products/data-sheet/nor-flash/serial-nor/mt25q/die-rev-b/mt25q_qlkt_u_01g_bbb_0.pdf

Tested on a i.MX8MP based board:

~# cat /sys/devices/platform/soc at 0/30800000.bus/30bb0000.spi/spi_master/spi0/spi0.0/spi-nor/jedec_id
20bb21104400

~# cat /sys/devices/platform/soc at 0/30800000.bus/30bb0000.spi/spi_master/spi0/spi0.0/spi-nor/manufacturer
st

~# cat /sys/devices/platform/soc at 0/30800000.bus/30bb0000.spi/spi_master/spi0/spi0.0/spi-nor/partname
mt25qu01g

~# xxd -p  /sys/devices/platform/soc at 0/30800000.bus/30bb0000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp
53464450060101ff00060110300000ff84000102800000ffffffffffffff
ffffffffffffffffffffffffffffffffffffe520fbffffffff3f29eb276b
273b27bbffffffffffff27bbffff29eb0c2010d80f520000244a99008b8e
03e1ac0127387a757a75fbbdd55c4a0f82ff81bd3d36ffffffffffffffff
ffffffffffffffffffe7ffff21dcffff

~# md5sum  /sys/devices/platform/soc at 0/30800000.bus/30bb0000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp
9d28d1b11de8b15ba9152644219d9a78 /sys/devices/platform/soc at 0/30800000.bus/30bb0000.spi/spi_master/spi0/spi0.0/spi-nor/sfdp

~# dd if=/dev/urandom of=spi_test bs=1M count=128
128+0 records in
128+0 records out
134217728 bytes (134 MB, 128 MiB) copied, 4.77424 s, 28.1 MB/s

~# mtd_debug write /dev/mtd0 0 134217728 spi_test
Copied 134217728 bytes from spi_test to address 0x00000000 in flash

~# mtd_debug read /dev/mtd0 0 134217728 spi_read
Copied 134217728 bytes from address 0x00000000 in flash to spi_read

~# sha1sum spi_test spi_read
6778615a7b7db2d3c3fa122721d940082eb67039  spi_test
6778615a7b7db2d3c3fa122721d940082eb67039  spi_read

~# flash_erase /dev/mtd0 0 0
Erasing 131072 Kibyte @ 0 -- 100 % complete 

~# hexdump -C /dev/mtd0
00000000  ff ff ff ff ff ff ff ff  ff ff ff ff ff ff ff ff  |................|
*
08000000

Signed-off-by: Fabio Estevam <festevam at denx.de>
---
Changes since v2:
- Added fixups to report the correct n_dice information.
- Removed .flags = NO_CHIP_ERASE (Michael)
- Removed .mfr_flags = USE_FSR (Michael)

 drivers/mtd/spi-nor/micron-st.c | 18 ++++++++++++++++++
 1 file changed, 18 insertions(+)

diff --git a/drivers/mtd/spi-nor/micron-st.c b/drivers/mtd/spi-nor/micron-st.c
index 8920547c12bf..31839d6bc3ac 100644
--- a/drivers/mtd/spi-nor/micron-st.c
+++ b/drivers/mtd/spi-nor/micron-st.c
@@ -192,6 +192,20 @@ static struct spi_nor_fixups mt25qu512a_fixups = {
 	.post_bfpt = mt25qu512a_post_bfpt_fixup,
 };
 
+static int mt25qu01g_post_sfdp_fixup(struct spi_nor *nor)
+{
+	struct spi_nor_flash_parameter *params = nor->params;
+
+	/* MT25QU01G does not define the SCCR entry, so pass n_dice manually. */
+	params->n_dice = 2;
+
+	return 0;
+}
+
+static struct spi_nor_fixups mt25qu01g_fixups = {
+	.post_sfdp = mt25qu01g_post_sfdp_fixup,
+};
+
 static const struct flash_info st_nor_parts[] = {
 	{
 		.name = "m25p05-nonjedec",
@@ -429,6 +443,10 @@ static const struct flash_info st_nor_parts[] = {
 			 SPI_NOR_BP3_SR_BIT6,
 		.no_sfdp_flags = SECT_4K | SPI_NOR_QUAD_READ,
 		.mfr_flags = USE_FSR,
+	}, {
+		.id = SNOR_ID(0x20, 0xbb, 0x21, 0x10, 0x44, 0x00),
+		.name = "mt25qu01g",
+		.fixups = &mt25qu01g_fixups,
 	}, {
 		.id = SNOR_ID(0x20, 0xbb, 0x21),
 		.name = "n25q00a",
-- 
2.34.1