u-boot.git/drivers/mtd, branch v2023.01

mtd: nand: mxs_nand_spl: don't read useless pages

2022-12-10T13:35:55+00:00

The patch prevents pages beyond the last from being unnecessarily read.
This occurs when the last page to be read is not the last page of the
last block. Before this change we would have read all the pages up to
the end of the last block.

Suggested-by: Michael Trimarchi 
Co-developed-by: Michael Trimarchi 
Signed-off-by: Michael Trimarchi 
Signed-off-by: Dario Binacchi 
Acked-by: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221120095705.3019295-1-dario.binacchi@amarulasolutions.com

mtd: nand: drop EXPORT_SYMBOL_GPL for nanddev_erase()

2022-12-10T13:35:55+00:00

This function is only used within this module, so it is no longer
necessary to use EXPORT_SYMBOL_GPL().

This patch parallels the work done in the following patch:
https://lore.kernel.org/linux-mtd/20221018170205.1733958-1-dario.binacchi@amarulasolutions.com

Signed-off-by: Dario Binacchi 
Reviewed-By: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221108090719.3631621-1-dario.binacchi@amarulasolutions.com

mtd: nand: make Samsung SLC NAND usable again

2022-12-10T13:35:55+00:00

Upstream linux commit 69fc01296c9281

commit a1286a1fc416 ("mtd: nand: Move Samsung specific init/detection
logic in nand_samsung.c") introduced a regression for Samsung SLC NAND
chips. Prior to this commit chip->bits_per_cell was initialized by calling
nand_get_bits_per_cell() before using nand_is_slc().
With the offending commit this call is skipped, leaving
chip->bits_per_cell cleared to zero when the manufacturer specific
'.detect' function calls nand_is_slc() which in turn interprets
bits_per_cell != 1 as indication for an MLC chip.
The effect is that e.g. a K9F1G08U0F NAND chip is falsely detected as
MLC NAND with 4KiB page size rather than SLC with 2KiB page size.

Add a call to nand_get_bits_per_cell() before calling the .detect hook
function in nand_manufacturer_detect(), so that the nand_is_slc()
calls in the manufacturer specific code will return correct results.

Reported-by: Marcin Gołaś 
Signed-off-by: Michael Trimarchi 
Reviewed-by: Dario Binacchi 
Link: https://lore.kernel.org/all/20221021060536.11747-1-michael@amarulasolutions.com
Signed-off-by: Dario Binacchi

mtd: rawnand: omap_gpmc: Reduce .bss usage

2022-12-10T13:35:54+00:00

Allocate omap_ecclayout on the heap as we have
limited .bss space on AM64 R5 SPL configuration.

Reduces .bss usage by 2984 bytes.

Signed-off-by: Roger Quadros 
Reviewed-By: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221011115012.6181-9-rogerq@kernel.org
Signed-off-by: Dario Binacchi

mtd: rawnand: nand_spl_loaders: Fix cast type build warning

2022-12-10T13:35:54+00:00

Fixes the below build warning on 64-bit platforms.

drivers/mtd/nand/raw/nand_spl_loaders.c:26:21: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
      dst = (void *)((int)dst - page_offset);

Signed-off-by: Roger Quadros 
Reviewed-by: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221011115012.6181-8-rogerq@kernel.org
Signed-off-by: Dario Binacchi

mtd: rawnand: omap_gpmc: Optimize NAND reads

2022-12-10T10:11:25+00:00

Rename omap_nand_read() to omap_nand_read_buf() to reflect
actual behaviour.

Use FIFO read address instead of raw read address for reads.

The GPMC automatically converts 32-bit/16-bit reads to NAND
device specific reads (8/16 bit). Use the largest possible
read granularity size for more efficient reads.

Signed-off-by: Roger Quadros 
Reviewed-by: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221011115012.6181-5-rogerq@kernel.org
Signed-off-by: Dario Binacchi

mtd: rawnand: omap_gpmc: Fix build warning on 64-bit platforms

2022-12-10T10:11:25+00:00

Pointer size cannot be assumed to be 32-bit, so use
use uintptr_t instead of uint32_t.

Fixes the below build warning on 64-bit builds.

drivers/mtd/nand/raw/omap_gpmc.c:439:10: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
  head = ((uint32_t) buf) % 4;

Signed-off-by: Roger Quadros 
Reviewed-by: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221011115012.6181-4-rogerq@kernel.org
Signed-off-by: Dario Binacchi

mtd: rawnand: omap_gpmc: Enable build for K2/K3 platforms

2022-12-10T10:11:25+00:00

The GPMC module is present on some K2 and K3 SoCs.
Enable building GPMC NAND driver for K2/K3 platforms.

Signed-off-by: Roger Quadros 
Reviewed-By: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221011115012.6181-3-rogerq@kernel.org
Signed-off-by: Dario Binacchi

mtd: rawnand: omap_gpmc: Deprecate asm/arch/mem.h

2022-12-10T10:11:25+00:00

We want to get rid of  so don't
enforce it for new platforms.

This also means GPMC_MAX CS doesn't have to be defined
by platform code.

Define it locally here for now.

Signed-off-by: Roger Quadros 
Reviewed-by: Michael Trimarchi 
Link: https://lore.kernel.org/all/20221011115012.6181-2-rogerq@kernel.org
Signed-off-by: Dario Binacchi

mtd: spi-nor-core: Invert logic to reflect sst26 flash unlocked

2022-12-05T09:01:45+00:00

flash_is_locked is changed to flash_is_unlocked with commit 513c6071ce73
("mtd: spi: Convert is_locked callback to is_unlocked"). sst26_is_locked()
is also changed to sst26_is_unlocked() but the logic remained same.
Invert the logic for the flash lock/unlock to work properly.

Signed-off-by: Algapally Santosh Sagar 
Signed-off-by: Ashok Reddy Soma 
Reviewed-by: Jan Kiszka 
Reviewed-by: Dhruva Gole 
Link: https://lore.kernel.org/r/20221122051833.13306-1-ashok.reddy.soma@amd.com
Signed-off-by: Michal Simek