linux-toradex.git/drivers/spi/spi-altera.c, branch v5.2-rc7

treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 500

2019-06-19T15:09:55+00:00

Based on 2 normalized pattern(s):

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation

  this program is free software you can redistribute it and or modify
  it under the terms of the gnu general public license version 2 as
  published by the free software foundation #

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 4122 file(s).

Signed-off-by: Thomas Gleixner 
Reviewed-by: Enrico Weigelt 
Reviewed-by: Kate Stewart 
Reviewed-by: Allison Randal 
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190604081206.933168790@linutronix.de
Signed-off-by: Greg Kroah-Hartman

spi: altera: Consolidate TX/RX data register access

2017-08-16T10:53:31+00:00

The patterns for accessing the TX/RX data registers is the same for the IRQ
and non-IRQ paths. Consolidate the duplicated code into shared helper
functions.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Mark Brown

spi: altera: Switch to SPI core transfer queue management

2017-08-16T10:53:27+00:00

The Altera SPI driver currently uses the spi-bitbang infrastructure for
transfer queue management, but non of the bitbang functionality itself.
This is because when the driver was written this was the only way to not
have to do queue management in the driver itself.

Nowadays transfer queue management is available from the SPI driver core
itself and using the bitbang infrastructure just adds an additional level
of indirection.

Switch the driver over to using the core queue management directly.

Signed-off-by: Lars-Peter Clausen 
Signed-off-by: Mark Brown

spi: drop owner assignment from platform_drivers

2014-10-20T14:21:36+00:00

A platform_driver does not need to set an owner, it will be populated by the
driver core.

Signed-off-by: Wolfram Sang

Merge remote-tracking branches 'spi/topic/imx', 'spi/topic/init', 'spi/topic/mpc512x-psc', 'spi/topic/mpc52xx', 'spi/topic/mxs', 'spi/topic/nuc900', 'spi/topic/oc-tiny' and 'spi/topic/octeon' into spi-next

2014-03-30T00:51:17+00:00

spi: altera: Remove the code to get unused platform_data

2014-03-21T18:12:58+00:00

The definition of struct altera_spi_platform_data does not exist in current
tree. So remove the code to get platform_data which is never used.

Signed-off-by: Axel Lin 
Signed-off-by: Mark Brown

spi: altera: Use bits_per_word_mask

2014-03-13T09:55:28+00:00

This driver does not work for bits_per_word greater than 16.
Set bits_per_word_mask so spi core will reject transfers that attempt to use
an unsupported bits_per_word value.

Signed-off-by: Axel Lin 
Signed-off-by: Mark Brown

spi: delete non-required instances of include

2014-02-03T12:20:35+00:00

None of these files are actually using any __init type directives
and hence don't need to include .  Most are just a
left over from __devinit and __cpuinit removal, or simply due to
code getting copied from one driver to the next.

Signed-off-by: Paul Gortmaker 
Signed-off-by: Mark Brown

spi: altera: Remove unneeded NULL checking for hw->bitbang.master

2014-01-13T10:12:45+00:00

We already has NULL test for master after calling spi_alloc_master().

Signed-off-by: Axel Lin 
Signed-off-by: Mark Brown

spi: bitbang: Let spi_bitbang_start() take a reference to master

2013-09-17T11:56:14+00:00

Many drivers that use bitbang library have a leak on probe error paths.
This is because once a spi_master_get() call succeeds, we need an additional
spi_master_put() call to free the memory.

Fix this issue by moving the code taking a reference to master to
spi_bitbang_start(), so spi_bitbang_start() will take a reference to master on
success. With this change, the caller is responsible for calling
spi_bitbang_stop() to decrement the reference and spi_master_put() as
counterpart of spi_alloc_master() to prevent a memory leak.

So now we have below patten for drivers using bitbang library:

probe:
spi_alloc_master        -> Init reference count to 1
spi_bitbang_start       -> Increment reference count
remove:
spi_bitbang_stop        -> Decrement reference count
spi_master_put          -> Decrement reference count (reference count reaches 0)

Fixup all users accordingly.

Signed-off-by: Axel Lin 
Suggested-by: Uwe Kleine-Koenig 
Acked-by: Uwe Kleine-Koenig 
Signed-off-by: Mark Brown