linux-toradex.git/drivers/dma/at_xdmac.c, branch v4.0.2

dmaengine: at_xdmac: fix for chan conf simplification

2015-03-05T08:59:57+00:00

When simplificating the channel configuration, the cyclic case has been
forgotten. It leads to use bad configuration causing many bugs.

Signed-off-by: Ludovic Desroches 
Acked-by: Nicolas Ferre 
Signed-off-by: Vinod Koul

dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers

2015-02-05T07:12:29+00:00

When using FIFO, we need to support differents data width in a single
transfer. For example, serial device which usually uses 1-byte data
width will use 4-bytes data width when using the FIFO. If the transfer
size is not aligned on 4-bytes then the end of the transfer will be
performed with 1-byte data-width. For that reason,
at_xdmac_prep_slave_sg() now builds linked list descriptors using view 2
instead of view 1 so each of them can update the DWIDTH field into the
Channel Configuration Register.

Signed-off-by: Cyrille Pitchen 
Signed-off-by: Ludovic Desroches 
Signed-off-by: Vinod Koul

dmaengine: at_xdmac: simplify channel configuration stuff

2015-02-05T07:12:29+00:00

This patch simplifies the channel configuration register management.
Relying on a "software snapshot" of the configuration is not safe and
too complex.

Multiple dwidths will be introduced for slave transfers. In this case,
it becomes quite difficult to have an accurate snapshot of the channel
configuration register in the way it is done. Using the channel
configuration available in the lli descriptor simplifies this stuff.

Signed-off-by: Ludovic Desroches 
Signed-off-by: Vinod Koul

dmaengine: at_xdmac: introduce save_cc field

2015-02-05T07:12:28+00:00

When suspending the device, read the channel configuration directly from
the register instead of relying on a software snapshot, it will be
safer.

Signed-off-by: Ludovic Desroches 
Signed-off-by: Vinod Koul

dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel

2015-02-05T07:12:28+00:00

Signed-off-by: Cyrille Pitchen 
Signed-off-by: Ludovic Desroches 
Signed-off-by: Vinod Koul

Merge branch 'topic/slave_caps_device_control_fix_rebased' into for-linus

2015-02-03T00:55:35+00:00

dmaengine: drop owner assignment from platform_drivers

2015-01-13T17:35:04+00:00

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

Signed-off-by: Wolfram Sang 
Signed-off-by: Vinod Koul

dmaengine: at_xdmac: Declare slave capabilities for the generic code

2014-12-22T07:03:23+00:00

Now that the generic slave caps code can make use of the device assigned
capabilities, instead of relying on a callback to be implemented.

Make use of this code.

Signed-off-by: Ludovic Desroches 
Signed-off-by: Maxime Ripard 
Signed-off-by: Vinod Koul

dmaengine: at_xdmac: split device_control

2014-12-22T06:58:57+00:00

Use newly introduced callbacks.

Signed-off-by: Ludovic Desroches 
Signed-off-by: Maxime Ripard 
Signed-off-by: Vinod Koul

dmaengine: Make the destination abbreviation coherent

2014-12-22T06:58:55+00:00

The dmaengine header abbreviates destination as at least two different strings.
Make a coherent use of a single one.

Signed-off-by: Maxime Ripard 
Acked-by: Mark Brown 
Acked-by: Laurent Pinchart 
Acked-by: Stephen Warren 
Signed-off-by: Vinod Koul