Commit Graph

5271 Commits

Author SHA1 Message Date
Boris BREZILLON
8cd65d1a63 mtd: nand: cs553x: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:08 -08:00
Boris BREZILLON
e787dfd1be mtd: nand: cafe: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:07 -08:00
Boris BREZILLON
f1c4c9992b mtd: nand: brcm: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:07 -08:00
Boris BREZILLON
7085a3bee3 mtd: nand: bf5xx: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:06 -08:00
Boris BREZILLON
ff70f354a9 mtd: nand: au1550nd: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:05 -08:00
Boris BREZILLON
ac01efebb1 mtd: nand: atmel: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:05 -08:00
Boris BREZILLON
187d6ada2a mtd: nand: ams-delta: use the mtd instance embedded in struct nand_chip
struct nand_chip now embeds an mtd device. Make use of this mtd instance
instead of allocating our own.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:04 -08:00
Boris BREZILLON
4578ea9a99 mtd: nand: omap2: create and use mtd_to_omap()
Define and use mtd_to_omap() instead of container_of();

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:03 -08:00
Boris BREZILLON
faee6c358b mtd: nand: nuc900: create and use mtd_to_nuc900()
Create and use mtd_to_nuc900() instead of direct container_of() calls.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:02 -08:00
Boris BREZILLON
277af429fb mtd: nand: fsmc: create and use mtd_to_fsmc()
Create and use mtd_to_fsmc() to avoid duplication of
container_of(mtd, struct fsmc_nand_data, mtd) calls.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:25:02 -08:00
Arnd Bergmann
ce7f28531f mtd: omap_elm: print interrupt resource using %pr
When CONFIG_LPAE is set on ARM, resource_size_t is 64-bit wide
and we get a warning about an incorrect format string for printing
the interrupt number in elm_probe:

drivers/mtd/nand/omap_elm.c: In function 'elm_probe':
drivers/mtd/nand/omap_elm.c:417:23: warning: format '%i' expects argument of type 'int', but argument 3 has type 'resource_size_t {aka long long unsigned int}' [-Wformat=]

This patch avoids the type mismatch by printing the interrupt as
a resource using the %pr format string.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-18 10:16:17 -08:00
Brian Norris
665d2c2848 mtd: bcm47xxnflash: really unregister NAND on device removal
The field bcma_nflash::mtd is never set to be non-zero anywhere, but we
test for it in the removal path. So the MTD is never unregistered.

Also, we should use nand_release(), not mtd_device_unregister().

Finally, we don't need to use the 'platdata' for stashing/retrieving our
*driver* data -- that's what *_{get,set}_drvdata() are for.

So, kill off bcm_nflash::mtd, and stash the struct bcm47xxnflash in
drvdata instead. Also move the forward declaration of mtd_info up a bit,
since struct bcma_sflash should be using it.

Caught while inspecting other changes being made to this driver. Compile
tested only.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: "Rafał Miłecki" <zajec5@gmail.com>
Cc: linux-wireless@vger.kernel.org
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-14 10:11:09 -08:00
Boris BREZILLON
320092a05d mtd: nand: denali: add missing nand_release() call in denali_remove()
Unregister the NAND device from the NAND subsystem when removing a denali
NAND controller, otherwise the MTD attached to the NAND device is still
exposed by the MTD layer, and accesses to this device will likely crash
the system.

Fixes: 2a0a288ec2 ("mtd: denali: split the generic driver and PCI layer")
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-11 12:42:46 -08:00
Brian Norris
207f6582dd mtd: brcmnand: defer to devm_ioremap_resource() for error checking
devm_ioremap_resource() does error checking on the 'res' argument, so
drop the error check in bcm6368_nand.c.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Simon Arlott <simon@fire.lp0.eu>
2015-12-10 13:08:08 -08:00
Simon Arlott
af3855dd19 mtd: brcmnand: Add support for the BCM6368
The BCM6368 has a NAND interrupt register with combined status and enable
registers.

As the BCM6328, BCM6362 and BCM6368 all use v2.1 controllers, the first
variant that will work with this driver is the BCM63268 using a v4.0
controller.

Set up the device by disabling and acking all interrupts, then handle
the CTRL_READY interrupt.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:28:42 -08:00
Simon Arlott
5c05bc0072 mtd: brcmnand: Request and enable the clock if present
Attempt to enable a clock named "nand" as some SoCs have a clock for the
controller that needs to be enabled.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Reviewed-by: Florian Fainelli <f.fainelli@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:28:41 -08:00
Geert Uytterhoeven
d5c5620167 mtd: nand: Confine MTD_NAND_SH_FLCTL to SUPERH
As of commit a521422ea4 ("ARM: shmobile: mackerel: Remove Legacy C
board code"), the Renesas SuperH FLCTL driver is no longer used on ARM
SH-Mobile SoCs. Restrict the dependencies, unless compile-testing.

Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:18:05 -08:00
Fabio Estevam
f49289ce64 mtd: spi-nor: Check the return value from read_sr()
We should better check the return value from read_sr() and
propagate it in the case of error.

Signed-off-by: Fabio Estevam <fabio.estevam@freescale.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 18:15:01 -08:00
Brian Norris
adc83bf889 mtd: partitions: support a cleanup callback for parsers
If partition parsers need to clean up their resources, we shouldn't
assume that all memory will fit in a single kmalloc() that the caller
can kfree(). We should allow the parser to provide a proper cleanup
routine.

Note that this means we need to keep a hold on the parser's module for a
bit longer, and release it later with mtd_part_parser_put().

Alongside this, define a default callback that we'll automatically use
if the parser doesn't provide one, so we can still retain the old
behavior.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 14:57:44 -08:00
Brian Norris
07fd2f871c mtd: partitions: pass around 'mtd_partitions' wrapper struct
For some of the core partitioning code, it helps to keep info about the
parsed partition (and who parsed them) together in one place.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 10:22:09 -08:00
Brian Norris
c42c2710d6 mtd: partitions: remove kmemdup()
The use of kmemdup() complicates the error handling a bit. We don't
actually need to allocate new memory, since this reference is treated as
const, and it is copied into new memory by the partition registration
code anyway. So remove it.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:22:06 -08:00
Brian Norris
5531ae4818 mtd: partitions: rename MTD parser get/put
We're going to reuse put_partition_parser(), so let's fix up the prefix
naming a bit, to hopefully be more consistent. Also make convert to a
true C function instead of a macro.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:22:02 -08:00
Brian Norris
b9adf469f8 mtd: partitions: make parsers return 'const' partition arrays
We only want to modify these arrays inside the parser "drivers", so the
drivers should construct them however they like, then return them as
immutable arrays.

This will make other refactorings easier.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:21:57 -08:00
Brian Norris
c3168d26c8 mtd: ofpart: assign return argument exactly once
It's easier to refactor these parsers if the return value gets assigned
only once, just like every other MTD partition parser.

This prepares for making the second arg to the parse_fn() const. This is
OK if we construct the partitions completely first, and assign them to
the return pointer only after we're done modifying them.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Boris Brezillon <boris.brezillon@free-electrons.com>
2015-12-09 10:21:52 -08:00
Brian Norris
2027cba66a mtd: merge for-4.4 development into -next development
A few MAINTAINERS updates, and some DT binding/documentation fixups.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-09 10:00:34 -08:00
Brian Norris
e488ca9f8d doc: dt: mtd: partitions: add compatible property to "partitions" node
As noted here [1], there are potentially future conflicts if we try to
use MTD's "partitions" subnode to describe anything besides just the
fixed-in-the-device-tree partitions currently described in this
document. Particularly, there was a proposal to use this node for the
AFS parser too.

It can pose a (small) problem to try to differentiate the following
nodes:

	// using binding as currently specified
	partitions {
		#address-cells = <x>;
		#size-cells = <y>;
		partition@0 {
			...;
		};
	};

and

	// proposed future binding
	partitions {
		compatible = "arm,arm-flash-structure";
	};

It's especially difficult if other uses of this node start having
subnodes.

So, since the "partitions" node is new in v4.4, let's fixup the binding
before release so that it requires a compatible property, so it's much
clearer to distinguish. e.g.:

	// proposed
	partitions {
		compatible = "fixed-partitions";
		#address-cells = <x>;
		#size-cells = <y>;
		partition@0 {
			...;
		};
	};

[1] Subject: "mtd: create a partition type device tree binding"
    http://lkml.kernel.org/g/20151113220039.GA74382@google.com
    http://lists.infradead.org/pipermail/linux-mtd/2015-November/063355.html
    http://lists.infradead.org/pipermail/linux-mtd/2015-November/063364.html

Cc: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
2015-12-08 17:10:20 -08:00
Boris BREZILLON
4bd4ebcc54 mtd: nand: make use of mtd_to_nand() in NAND drivers
mtd_to_nand() was recently introduced to avoid direct accesses to the
mtd->priv field. Update all NAND drivers to use it.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-08 12:24:36 -08:00
Boris BREZILLON
862eba519e mtd: nand: make use of mtd_to_nand() in NAND core code
mtd_to_nand() was recently introduced to avoid direct access to the
mtd->priv field. Update core code to use mtd_to_nand().

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-08 10:46:14 -08:00
Lars-Peter Clausen
41849d49d7 mtd: nand: r852: Remove unnecessary synchronize_irq() before free_irq()
Calling synchronize_irq() right before free_irq() is quite useless. On one
hand the IRQ can easily fire again before free_irq() is entered, on the
other hand free_irq() itself calls synchronize_irq() internally (in a race
condition free way), before any state associated with the IRQ is freed.

Patch was generated using the following semantic patch:
// <smpl>
@@
expression irq;
@@
-synchronize_irq(irq);
 free_irq(irq, ...);
// </smpl>

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-04 15:39:08 -08:00
Heiner Kallweit
d6af26944a mtd: spi-nor: fix error handling in spi_nor_erase
The documenting comment of mtd_erase in mtdcore.c states:
Device drivers are supposed to call instr->callback() whenever
the operation completes, even if it completes with a failure.

Currently the callback isn't called in case of failure. Fix this.

Signed-off-by: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-04 15:38:47 -08:00
Brian Norris
0f6d3f4097 mtd: mtk-quadspi: drop unnecessary .owner assignment
As of commit 807f16d4db ("mtd: core: set some defaults when
dev.parent is set"), the MTD core will set this for us.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: Bayi Cheng <bayi.cheng@mediatek.com>
2015-12-04 15:31:53 -08:00
Brian Norris
2524534dbb mtd: partitions: turn PART() macro into inline function
We can guard against reorganization of struct mtd_part by using
container_of(). We can also make sure we're using the right pointer
types by making this a static inline function instead of a macro.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-04 15:28:56 -08:00
Brian Norris
8c62b4e118 mtd: ofpart: don't complain about missing 'partitions' node too loudly
The ofpart partition parser might be run on DT-enabled systems that
don't have any "ofpart" partition subnodes at all, since "ofpart" is in
the default parser list. So don't complain loudly on every boot.

Example: using m25p80.c with no intent to use ofpart:

&spi2 {
	status = "okay";

	flash@0 {
		compatible = "jedec,spi-nor";
		reg = <0>;
	};
};

I see this warning:

[    0.588471] m25p80 spi2.0: gd25q32 (4096 Kbytes)
[    0.593091] spi2.0: 'partitions' subnode not found on /spi@ff130000/flash@0. Trying to parse direct subnodes as partitions.

Cc: Michal Suchanek <hramrach@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-03 17:50:36 -08:00
Brian Norris
d121b66d25 mtd: brcmnand: drop brcmnand_host::of_node field
We don't actually need to stash a copy of this device_node indefinitely;
we only need it in brcmnand_init_cs().

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Cc: <bcm-kernel-feedback-list@broadcom.com>
Cc: Kamal Dasu <kdasu.kdev@gmail.com>
Acked-by: Scott Branden <sbranden@broadcom.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-01 11:18:14 -08:00
Ricardo Ribalda
9b9f1033da mtd: spi-nor: Fix error message with unrecognized JEDEC
The error message was:

m25p80 spi32766.0: unrecognized JEDEC id bytes: 00,  0,  0

The new error message:

m25p80 spi32766.0: unrecognized JEDEC id bytes: 00, 00, 00

Signed-off-by: Ricardo Ribalda Delgado <ricardo.ribalda@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-12-01 10:39:49 -08:00
Julia Lawall
a81c0f07b4 mtd: nand: sunxi: add missing of_node_put
for_each_child_of_node performs an of_node_get on each iteration, so
a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
@@

 for_each_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
(
   return child;
|
+  of_node_put(child);
?  return ...;
)
   ...
 }
// </smpl>

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 17:55:03 -08:00
Julia Lawall
081976bcc0 mtd: brcmnand: improve memory management
This patch addresses two related memory management issues in the probe
function:

1. for_each_available_child_of_node performs an of_node_get on each
iteration, so a break out of the loop requires an of_node_put.

A simplified version of the semantic patch that fixes this problem is as
follows (http://coccinelle.lip6.fr):

// <smpl>
@@
expression root,e;
local idexpression child;
@@

 for_each_available_child_of_node(root, child) {
   ... when != of_node_put(child)
       when != e = child
(
   return child;
|
+  of_node_put(child);
?  return ...;
)
   ...
 }
// </smpl>

2. The devm_kzalloc'd data is not used if brcmnand_init_cs fails.  Free it
immediately, using devm_kfree in this case, instead of waiting for the
remove function.

Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 17:54:05 -08:00
Simon Arlott
0401669797 brcmnand: Clear EXT_ADDR error registers in PIO mode
If an error occurs in flash above 4GB in PIO mode then the EXT_ADDR
registers will be set to the location of the error and never cleared.

Reset them to 0 before reading.

Signed-off-by: Simon Arlott <simon@fire.lp0.eu>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 17:52:29 -08:00
Arnd Bergmann
f5f92b36fb mtd: cfi: enforce valid geometry configuration
MTD allows compile-time configuration of the possible CFI geometry
settings that are allowed by the kernel, but that includes a couple of
invalid configurations, where no bank width or no interleave setting
is allowed. These are then caught with a compile-time warning:

include/linux/mtd/cfi.h:76:2: warning: #warning No CONFIG_MTD_CFI_Ix selected. No NOR chip support can work.
include/linux/mtd/map.h:145:2: warning: #warning "No CONFIG_MTD_MAP_BANK_WIDTH_xx selected. No NOR chip support can work"

This is a bit annoying for randconfig tests, and can be avoided if
we change the Kconfig logic to always select the simplest configuration
when no other one is enabled.

Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-30 12:36:43 -08:00
Bayi Cheng
3ce351b535 mtd: mtk-nor: new Mediatek serial flash controller driver
Add spi nor flash driver for mediatek controller

Signed-off-by: Bayi Cheng <bayi.cheng@mediatek.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-20 17:35:16 -08:00
LABBE Corentin
72eaec21b0 mtd: nand: atmel_nand: constify atmel_nand_caps structures
All atmel_nand_caps are never modified, consitify them.

Signed-off-by: LABBE Corentin <clabbe.montjoie@gmail.com>
Acked-by: Josh Wu <josh.wu@atmel.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-20 09:54:36 -08:00
Brian Norris
b8f70badb8 mtd: kill off MTD partition parser boilerplate
Most parsers can be handled with our new boilerplate-reducing macro.
There are a few that can't be (cmdlineparts and ofpart).

Also kill off the owner assignments, since register_mtd_parser() now
takes care of that.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 18:46:29 -08:00
Brian Norris
b9eab01125 mtd: partitions: add module_mtd_part_parser() helper
This can help eliminate some boilerplate by generating the module_init()
and module_exit() functions, and by automatically assigning the module
owner.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 18:46:28 -08:00
Brian Norris
c1711b297f mtd: m25p80: replace leftover "nor-jedec" with "spi-nor" in comments
I overlooked a few comments in commit 8947e396a8 ("Documentation: dt:
mtd: replace "nor-jedec" binding with "jedec, spi-nor""). Fix these up
now.

Suggested-by: Javier Martinez Canillas <javier@osg.samsung.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
2015-11-19 16:46:49 -08:00
Brian Norris
de57732da8 mtd: m25p80: fix module autoloading for "jedec, spi-nor" and "spi-nor"
Commit 4316302292 ("mtd: m25p80: allow arbitrary OF matching for
"jedec,spi-nor"") moved the "jedec,spi-nor" handling from the
spi_device_id table to the of_match_table, to better handle matching
complex device tree compatible strings. With that patch, device tree
support works as expected when m25p80.c is built into the kernel.

However, that commit ignored the fact that:

 (1) (non-DT) platform devices might want to use the "spi-nor" string
     for matching with this driver, rather than picking an arbitrary one
     like "m25p80"
 (2) the core SPI uevent/modalias code doesn't yet support kernel module
     autoloading via of_match_table strings; so for DT-based devices, it
     will only report (part of) the first compatible string used

Problem (1) has been reported previously, and I forgot to patch it up
afterward.

Problem (2) was noticed recently here:
http://lists.infradead.org/pipermail/linux-mtd/2015-October/062369.html
https://lkml.org/lkml/2015/11/12/574

Specifically, this patch fixes m25p80.ko module autoloading for cases
like this:

	flash@xxx {
		compatible = "jedec,spi-nor";
		...
	};

because modalias of "spi:spi-nor" (the only module loading info provided
by the SPI core for this device) will now be listed as an alias in
m25p80.ko.

Notably, it does *not* help cases like this:

	flash@xxx {
		compatible = "vendor,shiny-new-device", "jedec,spi-nor";
		...
	};

unless we also list "shiny-new-device" in m25p_ids[]. There has been
discussion on future work for this issue here:
https://lkml.org/lkml/2015/11/12/574

Cc: Heiner Kallweit <hkallweit1@gmail.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Reviewed-by: Javier Martinez Canillas <javier@osg.samsung.com>
2015-11-19 16:46:42 -08:00
Andreas Fenkart
0501f2e5ff mtd: spi-nor: mx25l3205d/mx25l6405d: append SECT_4K
according datasheet both chips can erase 4kByte sectors individually

Signed-off-by: Andreas Fenkart <andreas.fenkart@dev.digitalstrom.org>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 13:37:35 -08:00
Brian Norris
cd78ea02dc mtd: m25p80: drop erase() callback
Just use the spi-nor default instead.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 13:34:45 -08:00
Brian Norris
c67cbb839d mtd: spi-nor: provide default erase_sector implementation
Some spi-nor drivers perform sector erase by duplicating their
write_reg() command. Let's not require that the driver fill this out,
and provide a default instead.

Tested on m25p80.c and Medatek's MT8173 SPI NOR flash driver.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 13:34:44 -08:00
Boris BREZILLON
1d8d8b5c85 mtd: nand: fix drivers abusing mtd->priv
The ->priv field of the mtd_info object attached to a nand_chip device
should point to the nand_chip device. The pxa and cafe drivers are
assigning this field their own private structure, which works fine as long
as the nand_chip field is the first one in the driver private struct but
seems a bit fragile.
Fix that by setting mtd->priv to point the nand_chip field and assigning
chip->priv to the private structure head.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Signed-off-by: Brian Norris <computersforpeace@gmail.com>
2015-11-19 10:59:25 -08:00
Brian Norris
064f462632 mtd: brcmnand: drop unused subpage_read() support
AFAIR this driver was never tested with subpage read support, and this
code is currently unused because we don't set the NAND_SUBPAGE_READ
flag. It can be resurrected if someone tests it properly.

Signed-off-by: Brian Norris <computersforpeace@gmail.com>
Tested-by: Ray Jui <rjui@broadcom.com>
2015-11-18 14:28:56 -08:00