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authorBoris Brezillon <boris.brezillon@bootlin.com>2018-06-07 22:52:56 +0200
committerBoris Brezillon <boris.brezillon@bootlin.com>2018-06-07 22:52:56 +0200
commit6e89b84e28f69c4f848dc8f1ea8fdecf33f2fbb4 (patch)
tree4c32febe723d922cf551e34c5a082033ebe371ce /Documentation
parentc64d4419a17cfb39a5b573f9016cd02ade4c9a64 (diff)
parentf567c71f4f91d173795a2f46d6fc493387ce084d (diff)
downloadlinux-6e89b84e28f69c4f848dc8f1ea8fdecf33f2fbb4.tar.bz2
Merge tag 'nand/for-4.18' of git://git.infradead.org/linux-mtd into mtd/next
Core changes: - Add Miquel as a NAND maintainer - Add access mode to the nand_page_io_req struct - Fix kernel-doc in rawnand.h - Support bit-wise majority to recover from corrupted ONFI parameter pages - Stop checking FAIL bit after a SET_FEATURES, as documented in the ONFI spec Raw NAND Driver changes: - Fix and cleanup the error path of many NAND controller drivers - GPMI: * Cleanup/simplification of a few aspects in the driver * Take ECC setup specified in the DT into account - sunxi: remove support for GPIO-based R/B polling - MTK: * Use of_device_get_match_data() instead of of_match_device() * Add an entry in MAINTAINERS for this driver * Fix nand-ecc-step-size and nand-ecc-strength description in the DT bindings doc - fsl_ifc: fix ->cmdfunc() to read more than one ONFI parameter page OneNAND driver changes: - samsung: use dev_get_drvdata() instead of platform_get_drvdata()
Diffstat (limited to 'Documentation')
-rw-r--r--Documentation/devicetree/bindings/mtd/gpmi-nand.txt5
-rw-r--r--Documentation/devicetree/bindings/mtd/mtk-nand.txt24
-rw-r--r--Documentation/devicetree/bindings/mtd/sunxi-nand.txt2
3 files changed, 24 insertions, 7 deletions
diff --git a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt
index b289ef3c1b7e..393588385c6e 100644
--- a/Documentation/devicetree/bindings/mtd/gpmi-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/gpmi-nand.txt
@@ -47,6 +47,11 @@ Optional properties:
partitions written from Linux with this feature
turned on may not be accessible by the BootROM
code.
+ - nand-ecc-strength: integer representing the number of bits to correct
+ per ECC step. Needs to be a multiple of 2.
+ - nand-ecc-step-size: integer representing the number of data bytes
+ that are covered by a single ECC step. The driver
+ supports 512 and 1024.
The device tree may optionally contain sub-nodes describing partitions of the
address space. See partition.txt for more detail.
diff --git a/Documentation/devicetree/bindings/mtd/mtk-nand.txt b/Documentation/devicetree/bindings/mtd/mtk-nand.txt
index 1c88526dedfc..f20ab4abd214 100644
--- a/Documentation/devicetree/bindings/mtd/mtk-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/mtk-nand.txt
@@ -50,14 +50,19 @@ Optional:
- nand-on-flash-bbt: Store BBT on NAND Flash.
- nand-ecc-mode: the NAND ecc mode (check driver for supported modes)
- nand-ecc-step-size: Number of data bytes covered by a single ECC step.
- valid values: 512 and 1024.
+ valid values:
+ 512 and 1024 on mt2701 and mt2712.
+ 512 only on mt7622.
1024 is recommended for large page NANDs.
- nand-ecc-strength: Number of bits to correct per ECC step.
- The valid values that the controller supports are: 4, 6,
- 8, 10, 12, 14, 16, 18, 20, 22, 24, 28, 32, 36, 40, 44,
- 48, 52, 56, 60.
+ The valid values that each controller supports:
+ mt2701: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28,
+ 32, 36, 40, 44, 48, 52, 56, 60.
+ mt2712: 4, 6, 8, 10, 12, 14, 16, 18, 20, 22, 24, 28,
+ 32, 36, 40, 44, 48, 52, 56, 60, 68, 72, 80.
+ mt7622: 4, 6, 8, 10, 12, 14, 16.
The strength should be calculated as follows:
- E = (S - F) * 8 / 14
+ E = (S - F) * 8 / B
S = O / (P / Q)
E : nand-ecc-strength.
S : spare size per sector.
@@ -66,6 +71,15 @@ Optional:
O : oob size.
P : page size.
Q : nand-ecc-step-size.
+ B : number of parity bits needed to correct
+ 1 bitflip.
+ According to MTK NAND controller design,
+ this number depends on max ecc step size
+ that MTK NAND controller supports.
+ If max ecc step size supported is 1024,
+ then it should be always 14. And if max
+ ecc step size is 512, then it should be
+ always 13.
If the result does not match any one of the listed
choices above, please select the smaller valid value from
the list.
diff --git a/Documentation/devicetree/bindings/mtd/sunxi-nand.txt b/Documentation/devicetree/bindings/mtd/sunxi-nand.txt
index 0734f03bf3d3..dcd5a5d80dc0 100644
--- a/Documentation/devicetree/bindings/mtd/sunxi-nand.txt
+++ b/Documentation/devicetree/bindings/mtd/sunxi-nand.txt
@@ -22,8 +22,6 @@ Optional properties:
- reset : phandle + reset specifier pair
- reset-names : must contain "ahb"
- allwinner,rb : shall contain the native Ready/Busy ids.
- or
-- rb-gpios : shall contain the gpios used as R/B pins.
- nand-ecc-mode : one of the supported ECC modes ("hw", "soft", "soft_bch" or
"none")