user/sven/linux.git/include/linux/mtd, branch v4.4.2

mtd: spi-nor: fix Spansion regressions (aliased with Winbond)

2016-01-06T00:00:03Z

Spansion and Winbond have occasionally used the same manufacturer ID, and they don't support the same features. Particularly, writing SR=0 seems to break read access for Spansion's s25fl064k. Unfortunately, we don't currently have a way to differentiate these Spansion and Winbond parts, so rather than regressing support for these Spansion flash, let's drop the new Winbond lock/unlock support for now. We can try to address Winbond support during the next release cycle. Original discussion: http://patchwork.ozlabs.org/patch/549173/ http://patchwork.ozlabs.org/patch/553683/ Fixes: 357ca38d4751 ("mtd: spi-nor: support lock/unlock/is_locked for Winbond") Fixes: c6fc2171b249 ("mtd: spi-nor: disable protection for Winbond flash at startup") Signed-off-by: Brian Norris Reported-by: Felix Fietkau Cc: Felix Fietkau

mtd: spi-nor: add mtd_is_locked() support

2015-10-14T01:22:54Z

This enables ioctl(MEMISLOCKED). Status can now be reported in the mtdinfo or flash_lock utilities found in mtd-utils. Signed-off-by: Brian Norris

mtd: spi-nor: fixup kernel-doc for flash lock/unlock function pointers

2015-10-14T01:22:53Z

I got the names of these fields wrong. Signed-off-by: Brian Norris

mtd: spi-nor: add SPI NOR manufacturer IDs

2015-10-14T01:22:51Z

These are often similar for CFI (parallel NOR) and for SPI NOR, but they aren't always the same, for various reasons (different namespaces, company acquisitions and renames, etc.). And some don't have CFI_MFR_* entries at all. So let's make a proper place to list the SPI NOR IDs, with all the SPI NOR specific assumptions and comments. Signed-off-by: Brian Norris

mtd: spi-nor: make bitfield constants more consistent

2015-10-14T01:22:51Z

These status bits use different ways of representing similar integer constants -- some are decimal, some are hex. Make them more consistent. At the same time, impose my own preference, since IMO it's clearer what these are when using the BIT() macro. Signed-off-by: Brian Norris

mtd: spi-nor: make implicit dependency explicit

2015-10-14T01:22:50Z

We use BIT() in the header. No real problem for now, but it's better to be accurate. Signed-off-by: Brian Norris

mtd: nand: pass page number to ecc->write_xxx() methods

2015-10-13T19:56:49Z

The ->read_xxx() methods are all passed the page number the NAND controller is supposed to read, but ->write_xxx() do not have such a parameter. This is a problem if we want to properly implement data scrambling/randomization in order to mitigate MLC sensibility to repeated pattern: to prevent bitflips in adjacent pages in the same block we need to avoid repeating the same pattern at the same offset in those pages, hence the randomizer/scrambler engine need to be passed the page value in order to adapt its seed accordingly. Moreover, adding the page parameter to the ->write_xxx() methods add some consistency to the current API. Signed-off-by: Boris Brezillon CC: Josh Wu CC: Ezequiel Garcia CC: Maxime Ripard CC: Greg Kroah-Hartman CC: Huang Shijie CC: Stefan Agner CC: devel@driverdev.osuosl.org CC: linux-arm-kernel@lists.infradead.org CC: linux-kernel@vger.kernel.org Signed-off-by: Brian Norris

mtd: nand: remove unused ->init_size() hook

2015-10-01T17:20:15Z

The ->init_size() hook was introduced to let NAND controller drivers support NAND devices that could not be described in the nand_ids table. Since then, the core has added support for extended-id parsing and full-id description, thus allowing to describe pretty much all existing NANDs. Moreover, this hook is not used by any mainline driver, and should not be used by new drivers, because detecting the NAND chip is not something controller specific. Signed-off-by: Boris Brezillon Signed-off-by: Brian Norris

mtd: spi-nor: remove unused read_xfer/write_xfer hooks

2015-09-21T23:49:52Z

struct spi_nor_xfer_cfg and read_xfer/write_xfer hooks were never used by any driver. Do some cleanup by removing them. Signed-off-by: Cyrille Pitchen Reviewed-by: Marek Vasut Signed-off-by: Brian Norris

mtd: nand: add nand_check_erased helper functions

2015-09-21T22:35:04Z

Add two helper functions to help NAND controller drivers test whether a specific NAND region is erased or not. Signed-off-by: Boris Brezillon Signed-off-by: Brian Norris