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The preferred way to implement SPI-NOR controller drivers is through SPI
subsubsystem utilizing the SPI MEM core functions. This converts the
Intel SPI flash controller driver over the SPI MEM by moving the driver
from SPI-NOR subsystem to SPI subsystem and in one go make it use the
SPI MEM functions. The driver name will be changed from intel-spi to
spi-intel to match the convention used in the SPI subsystem.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mauro Lima <mauro.lima@eclypsium.com>
Reviewed-by: Boris Brezillon <boris.brezillon@collabora.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Acked-by: Pratyush Yadav <p.yadav@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20220209122706.42439-3-mika.westerberg@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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Currently the driver tries to disable the BIOS write protection
automatically even if this is not what the user wants. For this reason
modify the driver so that by default it does not touch the write
protection. Only if specifically asked by the user (setting writeable=1
command line parameter) the driver tries to disable the BIOS write
protection.
Signed-off-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Reviewed-by: Mauro Lima <mauro.lima@eclypsium.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Lee Jones <lee.jones@linaro.org>
Link: https://lore.kernel.org/r/20220209122706.42439-2-mika.westerberg@linux.intel.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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In order to group x86 related platform data move intel-spi.h to x86 folder.
While at it, remove duplicate inclusion in C file.
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
[ta: s/x85/x86]
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
Link: https://lore.kernel.org/r/20210304140820.56692-1-andriy.shevchenko@linux.intel.com
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This change reverts aba3a882a178: "mtd: spi-nor: intel: provide a range
for poll_timout". That change introduces a performance regression when
reading sequentially from flash. Logging calls to intel_spi_read without
this change we get:
Start MTD read
[ 20.045527] intel_spi_read(from=1800000, len=400000)
[ 20.045527] intel_spi_read(from=1800000, len=400000)
[ 282.199274] intel_spi_read(from=1c00000, len=400000)
[ 282.199274] intel_spi_read(from=1c00000, len=400000)
[ 544.351528] intel_spi_read(from=2000000, len=400000)
[ 544.351528] intel_spi_read(from=2000000, len=400000)
End MTD read
With this change:
Start MTD read
[ 21.942922] intel_spi_read(from=1c00000, len=400000)
[ 21.942922] intel_spi_read(from=1c00000, len=400000)
[ 23.784058] intel_spi_read(from=2000000, len=400000)
[ 23.784058] intel_spi_read(from=2000000, len=400000)
[ 25.625006] intel_spi_read(from=2400000, len=400000)
[ 25.625006] intel_spi_read(from=2400000, len=400000)
End MTD read
Signed-off-by: Luis Alberto Herrera <luisalberto@google.com>
Tested-by: Alexander Sverdlin <alexander.sverdlin@gmail.com>
Acked-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Link: https://lore.kernel.org/r/20200610224652.64336-1-luisalberto@google.com
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
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After spi_nor_write_disable() return code checks were introduced in the
spi-nor front end intel-spi backend stopped to work because WRDI was never
supported and always failed.
Just pretend it was sucessful and ignore the command itself. HW sequencer
shall do the right thing automatically, while with SW sequencer we cannot
do it anyway, because the only tool we had was preopcode and it makes no
sense for WRDI.
Fixes: bce679e5ae3a ("mtd: spi-nor: Check for errors after each Register Operation")
Signed-off-by: Alexander Sverdlin <alexander.sverdlin@nokia.com>
Reviewed-by: Mika Westerberg <mika.westerberg@linux.intel.com>
Cc: stable@vger.kernel.org
Link: https://lore.kernel.org/r/282e1305-fd08-e446-1a22-eb4dff78cfb4@nokia.com
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
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Move all SPI NOR controller drivers to a controllers/ sub-directory
so that we only have SPI NOR related source files under
drivers/mtd/spi-nor/.
Rename spi-nor.c into core.c, we are about to split this file in multiple
source files (one per manufacturer, plus one for the SFDP parsing logic).
Signed-off-by: Boris Brezillon <bbrezillon@kernel.org>
Signed-off-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Reviewed-by: Vignesh Raghavendra <vigneshr@ti.com>
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