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Drop redundant WREN command in cqspi_erase() as SPI NOR core takes care
of sending WREN command before sending erase command.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-7-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
dma_request_chan_by_mask() can throw EPROBE_DEFER if DMA provider
is not yet probed. Currently driver just falls back to using PIO mode
(which is less efficient) in this case. Instead return probe deferral
error as is so that driver will be re probed once DMA provider is
available.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-6-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Make sure to undo the prior changes done by the driver when exiting due
to failure to acquire reset lines.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-5-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
If driver fails to acquire DMA channel then don't initialize
rx_dma_complete struct as it won't be used.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-4-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Currently direct access mode is used on platforms that have AHB window
(memory mapped window) larger than flash size. This feature is limited
to TI platforms as non TI platforms have < 1MB of AHB window.
Therefore introduce a driver quirk to disable DAC mode and set it for
non TI compatibles. This is in preparation to move to spi-mem framework
where flash geometry cannot be known.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-3-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
Drop configuration of Flash size, erase size and page size
configuration. Flash size is needed only if using AHB decoder (BIT 23 of
CONFIG_REG) which is not used by the driver.
Erase size and page size are needed if IP is configured to send WREN
automatically. But since SPI NOR layer takes care of sending WREN, there
is no need to configure these fields either.
Therefore drop these in preparation to move the driver to spi-mem
framework where flash geometry is not visible to controller driver.
Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com>
Reviewed-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Acked-by: Tudor Ambarus <tudor.ambarus@microchip.com>
Link: https://lore.kernel.org/r/20200601070444.16923-2-vigneshr@ti.com
Signed-off-by: Mark Brown <broonie@kernel.org>
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>
