[PATCH] mtd: spi-nor: gigadevice: add support for GD25LQ255E

[Weimin Wu]

gd25lq255e is similar with gd25lq256d, has 32MB of total capacity.
It support Quad Page Program which mean programming the memory using
four pins: IO0, IO1, IO2, and IO3.

Signed-off-by: Weimin Wu <wuweimin@xxxxxxxxxxxxxxxxxxxxxxxxxxxxxx>

---
/ # cat /sys/bus/spi/devices/spi0.0/spi-nor/partname
gd25lq256d

/ # cat /sys/bus/spi/devices/spi0.0/spi-nor/manufacturer
gigadevice

/ # cat /sys/bus/spi/devices/spi0.0/spi-nor/jedec_id
c86019

/ # xxd -p /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
53464450060102ff00060110300000ffc8000103900000ff84000102c000
00ffffffffffffffffffffffffffffffffffe520f3ffffffff0f44eb086b
083b42bbfeffffffffff00ffffff44eb0c200f5210d800ffd439a5fe82e4
1452ec6216337a757a7504bdd55c2906140008500001ffffffffffffffff
ffffffffffffffffffffffffffffffffffffffffffffffff002050169df9
77648fdbffffffffffffffffffffffffffffffffffffffffffffffffffff
ffffffffffffffffffffffffff0effff215cdcff

/ # sha256sum /sys/bus/spi/devices/spi0.0/spi-nor/sfdp
9f56d460181f7c0b6cc16a69554e3b587948b5f65323e976d0a4f1dbbcb93d94  /sys/bus/spi/devices/spi0.0/spi-nor/sfdp

/ # cat /sys/kernel/debug/spi-nor/spi0.0/capabilities
Supported read modes by the flash
 1S-1S-1S
  opcode	0x13
  mode cycles	0
  dummy cycles	0
 1S-1S-1S (fast read)
  opcode	0x0c
  mode cycles	0
  dummy cycles	8
 1S-1S-2S
  opcode	0x3c
  mode cycles	0
  dummy cycles	8
 1S-2S-2S
  opcode	0xbc
  mode cycles	2
  dummy cycles	2
 1S-1S-4S
  opcode	0x6c
  mode cycles	0
  dummy cycles	8
 1S-4S-4S
  opcode	0xec
  mode cycles	2
  dummy cycles	4
 4S-4S-4S
  opcode	0xec
  mode cycles	2
  dummy cycles	4

Supported page program modes by the flash
 1S-1S-1S
  opcode	0x12
 1S-1S-4S
  opcode	0x34

/ # cat /sys/kernel/debug/spi-nor/spi0.0/params
name		gd25lq256d
id		c8 60 19 c8 60 19
size		32.0 MiB
write size	1
page size	256
address nbytes	4
flags		HAS_SR_TB | 4B_OPCODES | HAS_4BAIT | HAS_LOCK | HAS_16BIT_SR | NO_READ_CR | SOFT_RESET

opcodes
 read		0x0c
  dummy cycles	8
 erase		0xdc
 program	0x12
 8D extension	none

protocols
 read		1S-1S-1S
 write		1S-1S-1S
 register	1S-1S-1S

erase commands
 21 (4.00 KiB) [1]
 5c (32.0 KiB) [2]
 dc (64.0 KiB) [3]
 c7 (32.0 MiB)

sector map
 region (in hex)   | erase mask | overlaid
 ------------------+------------+----------
 00000000-01ffffff |     [   3] | no
---
 drivers/mtd/spi-nor/gigadevice.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/mtd/spi-nor/gigadevice.c b/drivers/mtd/spi-nor/gigadevice.c
index ef1edd0ad..356a3f196 100644
--- a/drivers/mtd/spi-nor/gigadevice.c
+++ b/drivers/mtd/spi-nor/gigadevice.c
@@ -82,6 +82,12 @@ static const struct flash_info gigadevice_nor_parts[] = {
 		.size = SZ_16M,
 		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB,
 		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
+	}, {
+		.id = SNOR_ID(0xc8, 0x60, 0x19),
+		.name = "gd25lq256d",
+		.size = SZ_32M,
+		.flags = SPI_NOR_HAS_LOCK | SPI_NOR_HAS_TB | SPI_NOR_QUAD_PP,
+		.no_sfdp_flags = SECT_4K | SPI_NOR_DUAL_READ | SPI_NOR_QUAD_READ,
 	},
 };
 
-- 
2.43.0