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OMAP NAND driver currently supports multiple flavours of 1-bit Hamming
ecc-scheme, like:
- OMAP_ECC_HAMMING_CODE_DEFAULT
1-bit hamming ecc code using software library
- OMAP_ECC_HAMMING_CODE_HW
1-bit hamming ecc-code using GPMC h/w engine
- OMAP_ECC_HAMMING_CODE_HW_ROMCODE
1-bit hamming ecc-code using GPMC h/w engin with ecc-layout compatible
to ROM code.
This patch combines above multiple ecc-schemes into single implementation:
- OMAP_ECC_HAM1_CODE_HW
1-bit hamming ecc-code using GPMC h/w engine with ROM-code compatible
ecc-layout.
Signed-off-by: Pekon Gupta <[email protected]>
Reviewed-by: Felipe Balbi <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Tested-by: Ezequiel Garcia <[email protected]>
Signed-off-by: Brian Norris <[email protected]>
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OMAP NAND driver support multiple ECC scheme, which can used in different
flavours, depending on in-build Hardware engines present on SoC.
This patch updates following in DT bindings related to sectionion of ecc-schemes
- ti,elm-id: replaces elm_id (maintains backward compatibility)
- ti,nand-ecc-opts: selection of h/w or s/w implementation of an ecc-scheme
depends on ti,elm-id. (supported values ham1, bch4, and bch8)
- maintain backward compatibility to deprecated DT bindings (sw, hw, hw-romcode)
Below table shows different flavours of ecc-schemes supported by OMAP devices
+---------------------------------------+---------------+---------------+
| ECC scheme |ECC calculation|Error detection|
+---------------------------------------+---------------+---------------+
|OMAP_ECC_HAM1_CODE_HW |H/W (GPMC) |S/W |
+---------------------------------------+---------------+---------------+
|OMAP_ECC_BCH8_CODE_HW_DETECTION_SW |H/W (GPMC) |S/W |
|(requires CONFIG_MTD_NAND_ECC_BCH) | | |
+---------------------------------------+---------------+---------------+
|OMAP_ECC_BCH8_CODE_HW |H/W (GPMC) |H/W (ELM) |
|(requires CONFIG_MTD_NAND_OMAP_BCH && | | |
| ti,elm-id in DT) | | |
+---------------------------------------+---------------+---------------+
To optimize footprint of omap2-nand driver, selection of some ECC schemes
also require enabling following Kconfigs, in addition to setting appropriate
DT bindings
- Kconfig:CONFIG_MTD_NAND_ECC_BCH error detection done in software
- Kconfig:CONFIG_MTD_NAND_OMAP_BCH error detection done by h/w engine
Signed-off-by: Pekon Gupta <[email protected]>
Reviewed-by: Felipe Balbi <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Tested-by: Ezequiel Garcia <[email protected]>
Signed-off-by: Brian Norris <[email protected]>
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Pass an optional device_node pointer in the platform data, which in turn
will be put into a mtd_part_parser_data. This way, code that sets up the
platform devices can pass along the node from DT so that the partitions
can be parsed.
For non-DT boards, this change has no effect.
Signed-off-by: Daniel Mack <[email protected]>
Acked-by: Grant Likely <[email protected]>
Acked-by: Artem Bityutskiy <[email protected]>
Signed-off-by: Tony Lindgren <[email protected]>
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Update helper function that provides gpmc-nand register
details for nand driver with bch register information.
Using this nand driver can be made self sufficient to
handle remaining gpmc-nand operations by itself instead
of relying on gpmc exported nand functions.
Signed-off-by: Afzal Mohammed <[email protected]>
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For common arm zImage existing nand header file
in platform specific location was moved to generic
platform data location, but it contained more than
platform data, remove it. New local header has been
created for exposing functions.
Also move gpmc-nand platform data to platform header
meant for nand from gpmc header file
Signed-off-by: Afzal Mohammed <[email protected]>
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Platform data for device drivers should be defined in
include/linux/platform_data/*.h, not in the architecture
and platform specific directories.
This moves such data out of the omap include directories
Signed-off-by: Arnd Bergmann <[email protected]>
Acked-by: Mark Brown <[email protected]>
Acked-by: Greg Kroah-Hartman <[email protected]>
Acked-by: Nicolas Pitre <[email protected]>
Acked-by: Tony Lindgren <[email protected]>
Cc: Kevin Hilman <[email protected]>
Cc: "Benoît Cousson" <[email protected]>
Cc: Dmitry Torokhov <[email protected]>
Cc: David Woodhouse <[email protected]>
Cc: Kyungmin Park <[email protected]>
Cc: Ohad Ben-Cohen <[email protected]>
Cc: Grant Likely <[email protected]>
Cc: Omar Ramirez Luna <[email protected]>
Cc: Tomi Valkeinen <[email protected]>
Cc: Florian Tobias Schandinat <[email protected]>
Cc: Peter Ujfalusi <[email protected]>
Cc: Jarkko Nikula <[email protected]>
Cc: Liam Girdwood <[email protected]>
Cc: Artem Bityutskiy <[email protected]>
Cc: Jean Pihet <[email protected]>
Cc: J Keerthy <[email protected]>
Cc: [email protected]
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