Use physmap_of to access RAMs as mtd and add documenation for it. This approach
is a lot less intrusive as adding an of-wrapper around plat-ram.c. As most
extensions of plat-ram.c (e.g. custom map-functions) can't be mapped to the
device tree anyhow, extending physmap_of seems to be the cleanest approach.
Tested with a phyCORE-MPC5121e.
Signed-off-by: Wolfram Sang <w.sang@pengutronix.de>
Cc: Vitaly Wool <vwool@ru.mvista.com>
Cc: Artem Bityutskiy <dedekind@infradead.org>
Cc: Ken MacLeod <ken@bitsko.slc.ut.us>
Cc: Albrecht Dreß <albrecht.dress@arcor.de>
Acked-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This patch fixes a spelling error that has resulted from copy and
pasting. The location of the error was found using a semantic patch
but the semantic patch was not trying to find these errors. After
looking things over it seemed logical that this change was needed.
The patch also makes sure mtd_list is not being freed if it has not
been allocated
Signed-off-by: Stoyan Gaydarov <sgayda2@uiuc.edu>
Signed-off-by: Vimal Singh <vimalsingh@ti.com>
Signed-off-by: Artem Bityutskiy <Artem.Bityutskiy@nokia.com>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
This patch adds support to handle multiple non-identical chips in one
flash device tree node. It also adds concat support to physmap_of. This
makes it possible to support e.g. the Intel P30 48F4400 chips which
internally consists of 2 non-identical NOR chips on one die. Additionally
partitions now can span over multiple chips.
To describe such a chip's, multiple "reg" tuples are now supported in one
flash device tree node. Here an dts example:
flash@f0000000,0 {
#address-cells = <1>;
#size-cells = <1>;
compatible = "cfi-flash";
reg = <0 0x00000000 0x02000000
0 0x02000000 0x02000000>;
bank-width = <2>;
partition@0 {
label = "test-part1";
reg = <0 0x04000000>;
};
};
Signed-off-by: Stefan Roese <sr@denx.de>
Reviewed-by: Grant Likely <grant.likely@secretlab.ca>
Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Use of_get_next_child for proper ref counting as suggested by Stephen Rothwell
and remove add_mtd_partitions from parse_partitions to avoid duplicate
mtd device registration for RedBoot partitions.
Signed-off-by: Valentine Barshak <vbarshak@ru.mvista.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
Heckled-for-on-IRC-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
This patch includes a whole batch of smallish cleanups for
drivers/mtd/physmap_of.c.
- A bunch of uneeded #includes are removed
- We switch to the modern linux/of.h etc. in place of
asm/prom.h
- Use some helper macros to avoid some ugly inline #ifdefs
- A few lines of unreachable code are removed
- A number of indentation / line-wrapping fixes
- More consistent use of kernel idioms such as if (!p) instead
of if (p == NULL)
- Clarify some printk()s and other informative strings.
- parse_obsolete_partitions() now returns 0 if no partition
information is found, instead of returning -ENOENT which the caller
had to handle specially.
- (the big one) Despite the name, this driver really has
nothing to do with drivers/mtd/physmap.c. The fact that the flash
chips must be physically direct mapped is a constrant, but doesn't
really say anything about the actual purpose of this driver, which is
to instantiate MTD devices based on information from the device tree.
Therefore the physmap name is replaced everywhere within the file with
"of_flash". The file itself and the Kconfig option is not renamed for
now (so that the diff is actually a diff). That can come later.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
The latest physmap_of driver has a small error where it will fail the probe
with:
physmap-flash: probe of fff00000.small-flas failed with error -2
if there are no partition subnodes in the device tree and the old style binding
is not used. Since partition definitions are optional, the probe should still
succeed.
Signed-off-by: Josh Boyer <jwboyer@linux.vnet.ibm.com>
Acked-by: David Gibson <david@gibson.dropbear.id.au>
This replaces the binding for flash chips in booting-without-of.txt
with an clarified and improved version. It also makes
drivers/mtd/maps/physmap_of.c recognize this new binding. Finally it
revises the Ebony device tree source to use the new binding as an
example.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Acked-by: Segher Boessenkool <segher@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This patch removes redundant memset() and dead return line from
of_physmap_probe(). No functional change.
Signed-off-by: Mariusz Kozlowski <m.kozlowski@tuxland.pl>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
* git://git.infradead.org/mtd-2.6: (21 commits)
[MTD] [CHIPS] Remove MTD_OBSOLETE_CHIPS (jedec, amd_flash, sharp)
[MTD] Delete allegedly obsolete "bank_size" field of mtd_info.
[MTD] Remove unnecessary user space check from mtd.h.
[MTD] [MAPS] Remove flash maps for no longer supported 405LP boards
[MTD] [MAPS] Fix missing printk() parameter in physmap_of.c MTD driver
[MTD] [NAND] platform NAND driver: add driver
[MTD] [NAND] platform NAND driver: update header
[JFFS2] Simplify and clean up jffs2_add_tn_to_tree() some more.
[JFFS2] Remove another bogus optimisation in jffs2_add_tn_to_tree()
[JFFS2] Remove broken insert_point optimisation in jffs2_add_tn_to_tree()
[JFFS2] Remember to calculate overlap on nodes which replace older nodes
[JFFS2] Don't advance c->wbuf_ofs to next eraseblock after wbuf flush
[MTD] [NAND] at91_nand.c: CMDLINE_PARTS support
[MTD] [NAND] Tidy up handling of page number in nand_block_bad()
[MTD] block2mtd_paramline[] mustn't be __initdata
[MTD] [NAND] Support multiple chips in CAFÉ driver
[MTD] [NAND] Rename cafe.c to cafe_nand.c and remove the multi-obj magic
[MTD] [NAND] Use rslib for CAFÉ ECC
[RSLIB] Support non-canonical GF representations
[JFFS2] Remove dead file histo_mips.h
...
Squashes a compiler warning, and provides more useful information in
the case messed up device tree information.
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
These are all the remaining instances of get_property. Simple rename of
get_property to of_get_property.
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
inlined below is the patch that adds physmap driver for of_device.
It's an MTD part of the two-part support for flash/ROM devices based
on Open Firmware descriptions. The arch part (currently only PowerPC
which is no surprise) was introduced to powerpc folks earlier and
recently the older version of the powerpc part has been included into
the powerpc.git tree
(see http://www.kernel.org/git/?p=linux/kernel/git/paulus/powerpc.git;a=commitdiff;h=28f9ec349ae47c91768b7bc5607db4442c818e11).
drivers/mtd/maps/Kconfig | 9 +
drivers/mtd/maps/Makefile | 1
drivers/mtd/maps/physmap_of.c | 255 ++++++++++++++++++++++++++++++++++++++++++
3 files changed, 265 insertions(+)
Signed-off-by: Vitaly Wool <vwool@ru.mvista.com>
Signed-off-by: Sergey Shtylyov <sshtylyov@ru.mvista.com>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Wolfram Sang