This patch set adds support for the two main clock peripherals in the LPC18xx/43xx MCU family. The Clock Generation Unit (CGU) is the base source of all clocks. It has five external inputs and contains PLLs, dividers and muxes. The outputs from the CGU are then routed to a Clock Control Unit (CCU) and a few peripherals directly. There are two CCUs in the MCU. The CCU is a collection of gates and a few dividers that sits between the CGU and most of the peripherals. These clock drivers are needed by the timer at early boot so both are using CLK_OF_DECLARE. Which clocks that are available depends on the specific device and it's peripherals. It's possible in DT to setup the routing between the CGU and the CCUs. The biggest change in v4 is the way parent names for CCU clocks are stored and how clock branches are selected for registration in the CCU driver. * Parent clock names are now stored together with branch name in the clk_branches[] table. * Selection of which branch clock to register on the two CCU instances is determined by the 'clock-names' property. If a clock name matches with the parent name in the clk_branches[] table that branch clock is registered on the CCU. Alternativly the clk_branches[] table could be split between the CCUs, but there would still be a need to identify the CCU instance. For example by using different compatability stings in DT or adding an id property to DT. I belive the best solution is to let the driver decide which branch clocks to register based on the clock routing information already provided in DT. As mentioned above this is now done by using the 'clock-names' property and matching strings in the clk_branches[] table. Clock tree can be found here: http://slexy.org/raw/s2I3bIFJxg Changes since v3: - put CCU parent clock names directly in clk_branches[] table - use 'clock-names' property to find figure out which branch clocks to register in CCU driver as oppose to clk id - remove CCU clock list from doc and refer to lpc18xx-ccu.h - remove patch with of_clk_get_index Changes since v2: - use 'clock-controller' as node name in doc - add patch with of_clk_get_index function - drop 'clock-indices' and 'clock-output-names' from cgu node - move base clock names into cgu driver - use of_clk_get/__clk_get_name in ccu to get parent name for composite clocks. - other misc fixes to ccu driver and cgu doc Changes since v1: - reorganize cgu clk structs - macros to create cgu clk structs - move drivers to nxp subdir - rebase on v4.1-rc1 The last patch (dts changes) are only included in this patch set for illustration purposes. DTS changes will be sent separately to the ARM SoC team later. Base support for LPC18xx is now in arm-soc next. Pinctrl, gpio, reset and ethernet drivers are also upstream. Joachim Eastwood (5): clk: add lpc18xx cgu clk driver doc: dt: add documentation for lpc1850-cgu clk driver clk: add lpc18xx ccu clk driver doc: dt: add documentation for lpc1850-ccu clk driver ARM: dts: lpc18xx: add clock nodes for cgu and ccu .../devicetree/bindings/clock/lpc1850-ccu.txt | 77 +++ .../devicetree/bindings/clock/lpc1850-cgu.txt | 131 +++++ arch/arm/boot/dts/lpc18xx.dtsi | 85 ++- arch/arm/boot/dts/lpc4350-hitex-eval.dts | 4 - drivers/clk/Makefile | 1 + drivers/clk/nxp/Makefile | 2 + drivers/clk/nxp/clk-lpc18xx-ccu.c | 293 ++++++++++ drivers/clk/nxp/clk-lpc18xx-cgu.c | 635 +++++++++++++++++++++ include/dt-bindings/clock/lpc18xx-ccu.h | 74 +++ include/dt-bindings/clock/lpc18xx-cgu.h | 41 ++ 10 files changed, 1325 insertions(+), 18 deletions(-) create mode 100644 Documentation/devicetree/bindings/clock/lpc1850-ccu.txt create mode 100644 Documentation/devicetree/bindings/clock/lpc1850-cgu.txt create mode 100644 drivers/clk/nxp/Makefile create mode 100644 drivers/clk/nxp/clk-lpc18xx-ccu.c create mode 100644 drivers/clk/nxp/clk-lpc18xx-cgu.c create mode 100644 include/dt-bindings/clock/lpc18xx-ccu.h create mode 100644 include/dt-bindings/clock/lpc18xx-cgu.h -- 1.8.0 -- To unsubscribe from this list: send the line "unsubscribe devicetree" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
