ARM: rockchip: add dma support

A patchset in state Mainline for linux-kernel

From: Heiko Stuebner <heiko@...> Date: Thu, 14 Aug 2014 17:56:25 +0200

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 Färber 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(+) -- 1.9.0

Patches in this set


  • 4 individual patches
  • 105 lines added
  • 0 lines removed

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