From 05ff8c258c76dd469232a03ec8d45f7e7267e0ac Mon Sep 17 00:00:00 2001 From: Joe Schaack Date: Thu, 21 Feb 2013 16:29:45 -0600 Subject: mtd: ofpart: support partitions of 4 GiB and larger Previously, partitions were limited to less than 4 GiB in size because the address and size were read as 32-bit values. Add support for 64-bit values to support devices of 4 GiB and larger. Signed-off-by: Joe Schaack Signed-off-by: Nate Case Signed-off-by: Aaron Sierra Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- .../devicetree/bindings/mtd/partition.txt | 36 ++++++++++++++++++++-- 1 file changed, 34 insertions(+), 2 deletions(-) (limited to 'Documentation') diff --git a/Documentation/devicetree/bindings/mtd/partition.txt b/Documentation/devicetree/bindings/mtd/partition.txt index 6e1f61f1e78..9315ac96b49 100644 --- a/Documentation/devicetree/bindings/mtd/partition.txt +++ b/Documentation/devicetree/bindings/mtd/partition.txt @@ -5,8 +5,12 @@ on platforms which have strong conventions about which portions of a flash are used for what purposes, but which don't use an on-flash partition table such as RedBoot. -#address-cells & #size-cells must both be present in the mtd device and be -equal to 1. +#address-cells & #size-cells must both be present in the mtd device. There are +two valid values for both: +<1>: for partitions that require a single 32-bit cell to represent their + size/address (aka the value is below 4 GiB) +<2>: for partitions that require two 32-bit cells to represent their + size/address (aka the value is 4 GiB or greater). Required properties: - reg : The partition's offset and size within the mtd bank. @@ -36,3 +40,31 @@ flash@0 { reg = <0x0100000 0x200000>; }; }; + +flash@1 { + #address-cells = <1>; + #size-cells = <2>; + + /* a 4 GiB partition */ + partition@0 { + label = "filesystem"; + reg = <0x00000000 0x1 0x00000000>; + }; +}; + +flash@2 { + #address-cells = <2>; + #size-cells = <2>; + + /* an 8 GiB partition */ + partition@0 { + label = "filesystem #1"; + reg = <0x0 0x00000000 0x2 0x00000000>; + }; + + /* a 4 GiB partition */ + partition@200000000 { + label = "filesystem #2"; + reg = <0x2 0x00000000 0x1 0x00000000>; + }; +}; -- cgit v1.2.3-70-g09d2 From 880113eff2f7703f61f70361ba37d72941e2906d Mon Sep 17 00:00:00 2001 From: Artem Bityutskiy Date: Thu, 14 Mar 2013 13:09:08 +0200 Subject: Documentation: mtd: amend the sysfs docs after mtdchar merge The mtdchar module was merged with the mtdcore module, which means that the MTD_CHAR Kconfig symbol does not exist any more. Signed-off-by: Artem Bityutskiy Signed-off-by: David Woodhouse --- Documentation/ABI/testing/sysfs-class-mtd | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) (limited to 'Documentation') diff --git a/Documentation/ABI/testing/sysfs-class-mtd b/Documentation/ABI/testing/sysfs-class-mtd index 938ef71e203..3105644b3bf 100644 --- a/Documentation/ABI/testing/sysfs-class-mtd +++ b/Documentation/ABI/testing/sysfs-class-mtd @@ -14,8 +14,7 @@ Description: The /sys/class/mtd/mtd{0,1,2,3,...} directories correspond to each /dev/mtdX character device. These may represent physical/simulated flash devices, partitions on a flash - device, or concatenated flash devices. They exist regardless - of whether CONFIG_MTD_CHAR is actually enabled. + device, or concatenated flash devices. What: /sys/class/mtd/mtdXro/ Date: April 2009 @@ -23,8 +22,7 @@ KernelVersion: 2.6.29 Contact: linux-mtd@lists.infradead.org Description: These directories provide the corresponding read-only device - nodes for /sys/class/mtd/mtdX/ . They are only created - (for the benefit of udev) if CONFIG_MTD_CHAR is enabled. + nodes for /sys/class/mtd/mtdX/ . What: /sys/class/mtd/mtdX/dev Date: April 2009 -- cgit v1.2.3-70-g09d2