u-boot.git/include/spi.h, branch v2020.04

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

dm: spi: Change cs_info op to return -EINVAL for invalid cs num

2019-10-24T19:18:31+00:00

We need distinguish the following two situations in various SPI APIs:

- given chip select num is invalid
- given chip select num is valid, but no device is attached

Currently -ENODEV is returned for both cases.

For the first case, it's more reasonable to return -EINVAL instead of
-ENODEV for invalid chip select numbers.

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

spi: Add spi_write_then_read

2019-09-16T02:39:22+00:00

Add support for SPI synchronous write followed by read,
this is common interface call from spi-nor to spi drivers.

Reviewed-by: Simon Glass 
Signed-off-by: Jagan Teki 
Tested-by: Adam Ford  #da850-evm

dm: spi: Read default speed and mode values from DT

2019-04-12T06:24:50+00:00

This patch update the behavior introduced by
commit 96907c0fe50a ("dm: spi: Read default speed and mode values from DT")

In case of DT boot, don't read default speed and mode for SPI from
CONFIG_* but instead read from DT node. This will make sure that boards
with multiple SPI/QSPI controllers can be probed at different
bus frequencies and SPI modes.

Remove also use in boards of the value speed=0 (no more supported)
for ENV in SPI by using CONFIG_ENV_SPI_MAX_HZ=0.

DT values will be always used when available (full DM support of
SPI slave with available DT node) even if speed and mode are requested;
for example in splash screen support (in splash_sf_read_raw)
or in SPL boot (in spl_spi_load_image).
The caller of spi_get_bus_and_cs() no more need to force speed=0.

But the current behavior don't change if the SPI slave is not
present (device with generic driver is created automatically)
or if platdata is used (CONFIG_OF_PLATDATA).

Signed-off-by: Patrick Delaunay 
Acked-by: Jagan Teki

spi: Remove unused spi_init

2018-11-27T15:36:53+00:00

Remove spi_init definition which never used on
respective code since from many years.

Signed-off-by: Jagan Teki

spi: Extend the core to ease integration of SPI memory controllers

2018-09-20T14:40:49+00:00

Some controllers are exposing high-level interfaces to access various
kind of SPI memories. Unfortunately they do not fit in the current
spi_controller model and usually have drivers placed in
drivers/mtd/spi-nor which are only supporting SPI NORs and not SPI
memories in general.

This is an attempt at defining a SPI memory interface which works for
all kinds of SPI memories (NORs, NANDs, SRAMs).

Signed-off-by: Boris Brezillon 
Signed-off-by: Miquel Raynal 
Acked-by: Jagan Teki

SPDX: Convert all of our single license tags to Linux Kernel style

2018-05-07T13:34:12+00:00

When U-Boot started using SPDX tags we were among the early adopters and
there weren't a lot of other examples to borrow from.  So we picked the
area of the file that usually had a full license text and replaced it
with an appropriate SPDX-License-Identifier: entry.  Since then, the
Linux Kernel has adopted SPDX tags and they place it as the very first
line in a file (except where shebangs are used, then it's second line)
and with slightly different comment styles than us.

In part due to community overlap, in part due to better tag visibility
and in part for other minor reasons, switch over to that style.

This commit changes all instances where we have a single declared
license in the tag as both the before and after are identical in tag
contents.  There's also a few places where I found we did not have a tag
and have introduced one.

Signed-off-by: Tom Rini