[PATCH v2 0/4] ARM: rockchip: add dma support

Heiko Stübner
2014-08-14T20:59:48Z

All Rockchip SoCs currently supported use pl330 dma controllers.
The first patch introduces the concept of critical clocks, stolen from
sunxi, as some core clocks shouldn't be disabled under normal circumstances.
The patch is necessary, as the amba bus uses strict clock gating, which
without this patch results in the core aclk getting disabled halting the
system, before other components are able to probe and maybe claim their
clocks.

As the patches have no compile-time dependency on each other, the patchset
could be split with the first patch going through the clock tree and the
other three going through arm-soc.

changes since v1:
- address comment Sergei Shtylyov and rename nodes to dma-controller
- address comments from Doug Anderson:
- order by address
- rename the controller phandles to reflect the naming in the TRMs
On the rk3066/rk3188 there is one diversion in this regard.
The clocks really use indices 1 and 2 while the controllers references
use 0 and 1 (dmac0 and dmac1), so to prevent to much confusion I used
the clock indices for the handles instead of having dmac0 use ACLK_DMAC1
etc.
- address comment from Andreas F?rber adding suffixes of "_s" for the
secure and "_ns" for the non-secure variants of the first controller
As (nearly) all boards seem to use the secure controller, this becomes
the default

Heiko Stuebner (4):
clk: rockchip: protect critical clocks from getting disabled
ARM: rockchip: enable the AMBA bus
ARM: dts: rockchip: add rk3288 dma controllers
ARM: dts: rockchip: add rk3188 dma controllers

arch/arm/boot/dts/rk3288.dtsi | 38 ++++++++++++++++++++++++++++++++++++++
arch/arm/boot/dts/rk3xxx.dtsi | 38 ++++++++++++++++++++++++++++++++++++++
arch/arm/mach-rockchip/Kconfig | 1 +
drivers/clk/rockchip/clk-rk3188.c | 7 +++++++
drivers/clk/rockchip/clk-rk3288.c | 7 +++++++
drivers/clk/rockchip/clk.c | 13 +++++++++++++
drivers/clk/rockchip/clk.h | 1 +
7 files changed, 105 insertions(+)

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1.9.0