path: root/scripts/dtc/yamltree.c
diff options
authorMichael Ellerman <mpe@ellerman.id.au>2020-01-26 22:52:47 +1100
committerRob Herring <robh@kernel.org>2020-01-28 08:26:20 -0600
commitdabf6b36b83a18d57e3d4b9d50544ed040d86255 (patch)
treebe02aaf9a02b27d300c787643a913c1a4ae0270d /scripts/dtc/yamltree.c
parentdt-bindings: leds: Convert gpio-leds to DT schema (diff)
of: Add OF_DMA_DEFAULT_COHERENT & select it on powerpc
There's an OF helper called of_dma_is_coherent(), which checks if a device has a "dma-coherent" property to see if the device is coherent for DMA. But on some platforms devices are coherent by default, and on some platforms it's not possible to update existing device trees to add the "dma-coherent" property. So add a Kconfig symbol to allow arch code to tell of_dma_is_coherent() that devices are coherent by default, regardless of the presence of the property. Select that symbol on powerpc when NOT_COHERENT_CACHE is not set, ie. when the system has a coherent cache. Fixes: 92ea637edea3 ("of: introduce of_dma_is_coherent() helper") Cc: stable@vger.kernel.org # v3.16+ Reported-by: Christian Zigotzky <chzigotzky@xenosoft.de> Tested-by: Christian Zigotzky <chzigotzky@xenosoft.de> Signed-off-by: Michael Ellerman <mpe@ellerman.id.au> Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org> Signed-off-by: Rob Herring <robh@kernel.org>
Diffstat (limited to '')
0 files changed, 0 insertions, 0 deletions