u-boot.git/include/spi.h, branch v2020.10

mtd: spi: Drop SPI_XFER_MMAP*

2020-08-04T02:19:54+00:00

These two defines are no-longer supported. Drop them.

Signed-off-by: Simon Glass

acpi: Support generation of SPI descriptor

2020-07-17T06:32:24+00:00

Add a function to write a SPI descriptor to the generated ACPI code.

Signed-off-by: Simon Glass 
Reviewed-by: Wolfgang Wallner 
Reviewed-by: Bin Meng

spi: Remove unnecessary #ifdefs in header file

2020-07-09T04:33:24+00:00

These prevent use of compile-time checks such as:

    if (CONFIG_IS_ENABLED(DM_SPI))

since, for example, if CONFIG_SPL_DM_SPI is not enabled then the
definitions are not included by spi.h and the C code will not build.

The #ifdefs are unnecessary since there are no conflicts with the pre-DM
code. In any case we have almost switched over to driver model for SPI.

Drop these #ifdefs from spi.h to fix a build warning on chromebook_coral
in the following patch.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

spi: Convert CONFIG_DM_SPI* to CONFIG_$(SPL_TPL_)DM_SPI*

2020-06-29T17:34:43+00:00

This change allows more fine tuning of driver model based SPI support in
SPL and TPL. It is now possible to explicitly enable/disable the DM_SPI
support in SPL and TPL via Kconfig option.

Before this change it was necessary to use:
    /* SPI Flash Configs */
    #if defined(CONFIG_SPL_BUILD)
    #undef CONFIG_DM_SPI
    #undef CONFIG_DM_SPI_FLASH
    #undef CONFIG_SPI_FLASH_MTD
    #endif

in the ./include/configs/.h, which is error prone and shall be
avoided when we strive to switch to Kconfig.

The goal of this patch:

Provide distinction for DM_SPI support in both U-Boot proper and SPL (TPL).
Valid use case is when U-Boot proper wants to use DM_SPI, but SPL must
still support non DM driver.

Another use case is the conversion of non DM/DTS SPI driver to support
DM/DTS. When such driver needs to work in both SPL and U-Boot proper, the
distinction is needed in Kconfig (also if SPL version of the driver
supports OF_PLATDATA).

In the end of the day one would have to support following use cases (in
single driver file - e.g. mxs_spi.c):

- U-Boot proper driver supporting DT/DTS
- U-Boot proper driver without DT/DTS support (deprecated)
- SPL driver without DT/DTS support
- SPL (and TPL) driver with DT/DTS (when the SoC has enough resources to
  run full blown DT/DTS)
- SPL driver with DT/DTS and SPL_OF_PLATDATA (when one have constrained
  environment with no fitImage and OF_LIBFDT support).

Some boards do require SPI support (with DM) in SPL (TPL) and some only
have DM_SPI{_FLASH} defined to allow compiling SPL.

This patch converts #ifdef CONFIG_DM_SPI* to #if CONFIG_IS_ENABLED(DM_SPI)
and provides corresponding defines in Kconfig.

Signed-off-by: Lukasz Majewski 
Tested-by: Adam Ford  #da850-evm
Signed-off-by: Hou Zhiqiang 
[trini: Fixup a few platforms]
Signed-off-by: Tom Rini

common: Drop linux/bitops.h from common header

2020-05-19T01:19:23+00:00

Move this uncommon header out of the common header.

Signed-off-by: Simon Glass

spi: Add SPI mode enums

2020-04-16T06:36:28+00:00

With ACPI we need to describe the settings of the SPI bus. Add enums to
handle this.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng 
Reviewed-by: Wolfgang Wallner

mtd: spi-nor-core: Add octal mode support

2020-01-27T16:57:22+00:00

Add support for Octal flash devices. Octal flash devices use 8 IO lines
for data transfer. Currently only 1-1-8 Octal Read mode is supported.

Signed-off-by: Vignesh Raghavendra 
Reviewed-by: Jagan Teki

dm: spi: Check cs number before accessing slaves

2020-01-27T16:57:21+00:00

Add chip select number check in spi_find_chip_select().

Signed-off-by: Bin Meng 
Tested-by: Jagan Teki  # SoPine

spi: Correct operations check in dm_spi_xfer()

2019-12-15T03:44:21+00:00

At present we have to have an xfer() method even if it does nothing. This
is not correct, so fix it.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng

spi: Add support for memory-mapped flash

2019-11-02T23:20:26+00:00

On x86 platforms the SPI flash can be mapped into memory so that the
contents can be read with normal memory accesses.

Add a new SPI method to find the location of the SPI flash in memory. This
differs from the existing device-tree "memory-map" mechanism in that the
location can be discovered at run-time.

Signed-off-by: Simon Glass 
Reviewed-by: Bin Meng