linux-toradex.git/drivers/spi/spi-altera.c, branch v4.14-rc4

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

Merge tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc

2013-09-06T20:26:27+00:00

Pull ARM SoC DT updates from Olof Johansson:
"Device tree and bindings updates for 3.12.

General additions of various on-chip and on-board peripherals on
various platforms as support gets added. Some of the bigger changes
are:

- Addition of (new) PCI-e support on Tegra.
- More Tegra4 support, including PMC configuration for Dalmore.
- Addition of a new board for Exynos4 (trats2) and more bindings for
4x12 IP.
- Addition of Allwinner A20 and A31 SoC and board files.
- Move of the ST Ericsson device tree files to now use ste-* prefix.
- More move of hardware description of shmobile platforms to DT.
- Two new board dts files for Freescale MXs"

* tag 'dt-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (177 commits)
dts: Rename DW APB timer compatible strings
dts: Deprecate ALTR as a vendor prefix
of: add vendor prefix for Altera Corp.
ARM: at91/dt: sam9x5ek: add sound configuration
ARM: at91/dt: sam9x5ek: enable SSC
ARM: at91/dt: sam9x5ek: add WM8731 codec
ARM: at91/dt: sam9x5: add SSC DMA parameters
ARM: at91/dt: add at91rm9200 PQFP package version
ARM: at91: at91rm9200: set default mmc0 pinctrl-names
ARM: at91: at91sam9n12: correct pin number of gpio-key
ARM: at91: at91sam9n12: add qt1070 support
ARM: at91: at91sam9n12: add pinctrl of TWI
ARM: at91: Add PMU support for sama5d3
ARM: at91: at91sam9260: add missing pinctrl-names on mmc
ARM: tegra: configure power off for Dalmore
ARM: DT: binding fixup to align with vendor-prefixes.txt (DT)
ARM: dts: add sdio blocks to bcm28155-ap board
ARM: dts: align sdio numbers to HW definition
ARM: sun7i: Add Olimex A20-Olinuxino-Micro support
ARM: sun7i: Add Allwinner A20 DTSI
...