[PATCH 1/7] kernel: Add GigaDevice GD5F4GQ4xC SPI NAND flash

[Hauke Mehrtens]

This flash was found on the Imagination Technologies Creator Ci40 (Marduk).

Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
---
 ...dd-support-for-GigaDevice-GD5F4GQ4xC.patch | 86 +++++++++++++++++++
 1 file changed, 86 insertions(+)
 create mode 100644 target/linux/generic/pending-5.4/445-mtd-spinand-Add-support-for-GigaDevice-GD5F4GQ4xC.patch

diff --git a/target/linux/generic/pending-5.4/445-mtd-spinand-Add-support-for-GigaDevice-GD5F4GQ4xC.patch b/target/linux/generic/pending-5.4/445-mtd-spinand-Add-support-for-GigaDevice-GD5F4GQ4xC.patch
new file mode 100644
index 000000000000..56ddc2496a33
--- /dev/null
+++ b/target/linux/generic/pending-5.4/445-mtd-spinand-Add-support-for-GigaDevice-GD5F4GQ4xC.patch
@@ -0,0 +1,86 @@
+From d774db4749a67038f1c04058e74234c023100177 Mon Sep 17 00:00:00 2001
+From: Hauke Mehrtens <hauke at hauke-m.de>
+Date: Wed, 12 Aug 2020 22:50:26 +0200
+Subject: [PATCH] mtd: spinand: Add support for GigaDevice GD5F4GQ4xC
+
+This adds support for the following 4GiB chips:
+GD5F4GQ4RCYIG 1.8V
+GD5F4GQ4UCYIG 3.3V
+
+The datasheet can be found here:
+https://www.novitronic.ch/sixcms/media.php/2/DS-00173-GD5F4GQ4xCxIG-Rev1.574695.pdf
+
+The GD5F4GQ4UCYIGT (3.3V) version is used on the Imagination
+Technologies Creator Ci40 (Marduk), the 1.8V version was not tested.
+
+This device only works in single SPI mode and not in dual or quad mode
+for me on this board.
+
+Signed-off-by: Hauke Mehrtens <hauke at hauke-m.de>
+---
+ drivers/mtd/nand/spi/gigadevice.c | 49 +++++++++++++++++++++++++++++++
+ 1 file changed, 49 insertions(+)
+
+--- a/drivers/mtd/nand/spi/gigadevice.c
++++ b/drivers/mtd/nand/spi/gigadevice.c
+@@ -132,6 +132,35 @@ static const struct mtd_ooblayout_ops gd
+ 	.free = gd5fxgq4_variant2_ooblayout_free,
+ };
+ 
++static int gd5fxgq4xc_ooblayout_256_ecc(struct mtd_info *mtd, int section,
++					struct mtd_oob_region *oobregion)
++{
++	if (section)
++		return -ERANGE;
++
++	oobregion->offset = 128;
++	oobregion->length = 128;
++
++	return 0;
++}
++
++static int gd5fxgq4xc_ooblayout_256_free(struct mtd_info *mtd, int section,
++					 struct mtd_oob_region *oobregion)
++{
++	if (section)
++		return -ERANGE;
++
++	oobregion->offset = 1;
++	oobregion->length = 127;
++
++	return 0;
++}
++
++static const struct mtd_ooblayout_ops gd5fxgq4xc_oob_256_ops = {
++	.ecc = gd5fxgq4xc_ooblayout_256_ecc,
++	.free = gd5fxgq4xc_ooblayout_256_free,
++};
++
+ static int gd5fxgq4uexxg_ecc_get_status(struct spinand_device *spinand,
+ 					u8 status)
+ {
+@@ -222,6 +251,24 @@ static const struct spinand_info gigadev
+ 		     0,
+ 		     SPINAND_ECCINFO(&gd5fxgq4xa_ooblayout,
+ 				     gd5fxgq4xa_ecc_get_status)),
++	SPINAND_INFO("GD5F4GQ4RC", 0xa468,
++		     NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 1),
++		     NAND_ECCREQ(8, 512),
++		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants_f,
++					      &write_cache_variants,
++					      &update_cache_variants),
++		     0,
++		     SPINAND_ECCINFO(&gd5fxgq4xc_oob_256_ops,
++				     gd5fxgq4ufxxg_ecc_get_status)),
++	SPINAND_INFO("GD5F4GQ4UC", 0xb468,
++		     NAND_MEMORG(1, 4096, 256, 64, 2048, 40, 1, 1, 1),
++		     NAND_ECCREQ(8, 512),
++		     SPINAND_INFO_OP_VARIANTS(&read_cache_variants_f,
++					      &write_cache_variants,
++					      &update_cache_variants),
++		     0,
++		     SPINAND_ECCINFO(&gd5fxgq4xc_oob_256_ops,
++				     gd5fxgq4ufxxg_ecc_get_status)),
+ 	SPINAND_INFO("GD5F1GQ4UExxG", 0xd1,
+ 		     NAND_MEMORG(1, 2048, 128, 64, 1024, 20, 1, 1, 1),
+ 		     NAND_ECCREQ(8, 512),
-- 
2.20.1