linux-toradex.git/drivers/dma/dw, branch v4.0 Linux kernel for Apalis and Colibri modules dmaengine: dw: append MODULE_ALIAS for platform driver 2015-03-16T16:37:03+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2015-03-09T10:16:42+00:00 a104a45ba7a51b5b4c5e8437020d9d48edf22f89 The commit 9cade1a46c77 (dma: dw: split driver to library part and platform code) introduced a separate platform driver but missed to add a MODULE_ALIAS("platform:dw_dmac"); to that module. The patch adds this to get driver loaded automatically if platform device is registered. Reported-by: "Blin, Jerome" <jerome.blin@intel.com> Fixes: 9cade1a46c77 (dma: dw: split driver to library part and platform code) Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
The commit 9cade1a46c77 (dma: dw: split driver to library part and platform
code) introduced a separate platform driver but missed to add a
MODULE_ALIAS("platform:dw_dmac"); to that module.

The patch adds this to get driver loaded automatically if platform device is
registered.

Reported-by: "Blin, Jerome" <jerome.blin@intel.com>
Fixes: 9cade1a46c77 (dma: dw: split driver to library part and platform code)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: dw: don't handle interrupt when dmaengine is not used 2015-03-05T08:37:48+00:00 Jie Yang yang.jie@intel.com 2015-03-05T06:08:08+00:00 94b3eed7b8a4311f56a86b36430e9068b596ada4 When dma controller is not used by any user and set off, we should disble interrupt handler, at least the interrupt reset part, for some subsystem, e.g. ADSP, may use the dma in its own logic, here reset the interrupt may make this subsystem work abnormally. Signed-off-by: Jie Yang <yang.jie@intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
When dma controller is not used by any user and set off,
we should disble interrupt handler, at least the interrupt
reset part, for some subsystem, e.g. ADSP, may use the
dma in its own logic, here reset the interrupt may make
this subsystem work abnormally.

Signed-off-by: Jie Yang <yang.jie@intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
Merge branch 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma 2015-02-18T16:49:20+00:00 Linus Torvalds torvalds@linux-foundation.org 2015-02-18T16:49:20+00:00 ce1d3fde87d1a21f1ec1147dde32b2825dd3a276 Pull dmaengine updates from Vinod Koul: "This update brings: - the big cleanup up by Maxime for device control and slave capabilities. This makes the API much cleaner. - new IMG MDC driver by Andrew - new Renesas R-Car Gen2 DMA Controller driver by Laurent along with bunch of fixes on rcar drivers - odd fixes and updates spread over driver" * 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits) dmaengine: pl330: add DMA_PAUSE feature dmaengine: pl330: improve pl330_tx_status() function dmaengine: rcar-dmac: Disable channel 0 when using IOMMU dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR dmaengine: rcar-dmac: Fix spinlock issues in interrupt dmaenegine: edma: fix sparse warnings dmaengine: rcar-dmac: Fix uninitialized variable usage dmaengine: shdmac: extend PM methods dmaengine: shdmac: use SET_RUNTIME_PM_OPS() dmaengine: pl330: fix bug that cause start the same descs in cyclic dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers dmaengine: at_xdmac: simplify channel configuration stuff dmaengine: at_xdmac: introduce save_cc field dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel ioat: fail self-test if wait_for_completion times out dmaengine: dw: define DW_DMA_MAX_NR_MASTERS dmaengine: dw: amend description of dma_dev field dmatest: move src_off, dst_off, len inside loop ... 
Pull dmaengine updates from Vinod Koul:
 "This update brings:

   - the big cleanup up by Maxime for device control and slave
     capabilities.  This makes the API much cleaner.

   - new IMG MDC driver by Andrew

   - new Renesas R-Car Gen2 DMA Controller driver by Laurent along with
     bunch of fixes on rcar drivers

   - odd fixes and updates spread over driver"

* 'for-linus' of git://git.infradead.org/users/vkoul/slave-dma: (130 commits)
  dmaengine: pl330: add DMA_PAUSE feature
  dmaengine: pl330: improve pl330_tx_status() function
  dmaengine: rcar-dmac: Disable channel 0 when using IOMMU
  dmaengine: rcar-dmac: Work around descriptor mode IOMMU errata
  dmaengine: rcar-dmac: Allocate hardware descriptors with DMAC device
  dmaengine: rcar-dmac: Fix oops due to unintialized list in error ISR
  dmaengine: rcar-dmac: Fix spinlock issues in interrupt
  dmaenegine: edma: fix sparse warnings
  dmaengine: rcar-dmac: Fix uninitialized variable usage
  dmaengine: shdmac: extend PM methods
  dmaengine: shdmac: use SET_RUNTIME_PM_OPS()
  dmaengine: pl330: fix bug that cause start the same descs in cyclic
  dmaengine: at_xdmac: allow muliple dwidths when doing slave transfers
  dmaengine: at_xdmac: simplify channel configuration stuff
  dmaengine: at_xdmac: introduce save_cc field
  dmaengine: at_xdmac: wait for in-progress transaction to complete after pausing a channel
  ioat: fail self-test if wait_for_completion times out
  dmaengine: dw: define DW_DMA_MAX_NR_MASTERS
  dmaengine: dw: amend description of dma_dev field
  dmatest: move src_off, dst_off, len inside loop
  ...
dmaengine: dw: define DW_DMA_MAX_NR_MASTERS 2015-02-05T06:39:44+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2015-01-13T17:08:14+00:00 d8ded50f8b26a224df48f9f93e49440c6a39b77f Instead of using magic number in the code the patch provides DW_DMA_MAX_NR_MASTERS constant. While here, restrict the reading of data width array by amount of the actual number of AHB masters. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
Instead of using magic number in the code the patch provides
DW_DMA_MAX_NR_MASTERS constant.

While here, restrict the reading of data width array by amount of the actual
number of AHB masters.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: dw: provide DMA capabilities 2015-01-13T18:16:00+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2015-01-02T14:17:24+00:00 029a40e97d0db269f4a7fc02b0f29f627f628309 The new DMAEngine requirement is to provide what the DMA controller can do, such as directions, bus widths, and residue granularity. The patch sets those properties for the DesignWare DMA controller driver. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
The new DMAEngine requirement is to provide what the DMA controller can do,
such as directions, bus widths, and residue granularity. The patch sets those
properties for the DesignWare DMA controller driver.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: dw: balance PM runtime calls 2015-01-13T17:37:58+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2015-01-13T16:57:15+00:00 6acf3998d2c7420b2deb2b475fa78ba7573c6162 In case of PCI driver we will get a warning: dw_dmac_pci 0000:00:18.0: Unbalanced pm_runtime_enable! dw_dmac_pci 0000:00:18.0: DesignWare DMA Controller, 8 channels This happens due to pm_runtime_enable() call from the driver when PM runtime is enabled by core. This patch moves that call to the platform driver where it might make sense. Fixes: bb32baf76e56 (dmaengine: dw: enable runtime PM) Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
In case of PCI driver we will get a warning:
	dw_dmac_pci 0000:00:18.0: Unbalanced pm_runtime_enable!
	dw_dmac_pci 0000:00:18.0: DesignWare DMA Controller, 8 channels

This happens due to pm_runtime_enable() call from the driver when PM runtime is
enabled by core.

This patch moves that call to the platform driver where it might make sense.

Fixes: bb32baf76e56 (dmaengine: dw: enable runtime PM)
Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: dw: update the driver comments 2014-12-22T14:56:45+00:00 Vinod Koul vinod.koul@intel.com 2014-12-22T14:54:14+00:00 295d3e10e68a37ac2850b9da32659cfdcd351f8b driver comment refers to DMA_SLAVE_CONFIG which needs to be updated to .device_config Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
driver comment refers to DMA_SLAVE_CONFIG which needs to be updated to
.device_config

Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: dw: Split device_control 2014-12-22T06:58:58+00:00 Maxime Ripard maxime.ripard@free-electrons.com 2014-11-17T13:42:12+00:00 a4b0d348f60122eb45c50b3e79a8edaec6fee534 Split the device_control callback of the DesignWare DMA driver to make use of the newly introduced callbacks, that will eventually be used to retrieve slave capabilities. Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
Split the device_control callback of the DesignWare DMA driver to make use
of the newly introduced callbacks, that will eventually be used to retrieve
slave capabilities.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>
dmaengine: dw: enable runtime PM 2014-11-11T22:44:19+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2014-11-05T16:34:48+00:00 bb32baf76e56cdb348633f4d789a93e81b975c47 On runtime PM aware platforms the DMA have to manage its own power state. This patch enables runtime PM support and applies necessary calls wherever it's needed. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Acked-by: Vinod Koul <vinod.koul@intel.com> Tested-by: Scott Ashcroft <scott.ashcroft@talk21.com> Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com> 
On runtime PM aware platforms the DMA have to manage its own power state. This
patch enables runtime PM support and applies necessary calls wherever it's
needed.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Acked-by: Vinod Koul <vinod.koul@intel.com>
Tested-by: Scott Ashcroft <scott.ashcroft@talk21.com>
Signed-off-by: Rafael J. Wysocki <rafael.j.wysocki@intel.com>
dmaengine: dw: export probe()/remove() and Co to users 2014-10-15T15:01:05+00:00 Andy Shevchenko andriy.shevchenko@linux.intel.com 2014-09-23T14:18:15+00:00 2a52f6e49e5e400ed98a79503193d81207009647 The driver library functions can be used directly by the compound devices such as ADSP or serial driver where DesignWare DMA IP is privately attached to the main hardware. Instead of creating a new platform device leaf they may call dw_dma_probe() with given struct dw_dma_chip directly and make sure that the main device is DMA capable. Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com> Signed-off-by: Vinod Koul <vinod.koul@intel.com> 
The driver library functions can be used directly by the compound devices such
as ADSP or serial driver where DesignWare DMA IP is privately attached to the
main hardware.

Instead of creating a new platform device leaf they may call dw_dma_probe()
with given struct dw_dma_chip directly and make sure that the main device is
DMA capable.

Signed-off-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Vinod Koul <vinod.koul@intel.com>