From: Martin Sperl <kernel@xxxxxxxxxxxxxxxx> Add a graphviz dot file containing the (currently) best known representation of the bcm2835 clock tree. This information has mostly been gleaned/guessed from the headerfiles that broadcom shared for VideoCore4 at: http://www.broadcom.com/docs/support/videocore/Brcm_Android_ICS_Graphics_Stack.tar.gz These headers have been transformed and the extracted information is more easily consumable at: * https://github.com/msperl/rpi-registers/blob/master/md/Region_A2W.md * https://github.com/msperl/rpi-registers/blob/master/md/Region_CM.md Based on this information most of the missing clocks are added in separate patches with logical grouping: * pll-divider * oscillator and peripherial clocks * camera * dsi/display * arm * gate clocks * testdebug clock generator clocks Note that the biggest possible problem can be identification of the correct parent clocks for the relevant muxes. The patches try to be conservative using only the "standard" pattern (=osc clocks) where it seems a new mux is used for a specific clock(group). It would be helpfull if someone with access to the HW documentation can report the actual parents that are used so that the parents can get corrected. Having all those clocks in place should reduce the risk that we disable another pll used by the firmware, which can bring down the system See: "clk: bcm2835: enable clocks that have been enabled by firmware" Note that this patchset (except for the graphviz file) requires at least the following patches from the new clock initialization patch-set to be applied: clk: bcm2835: remove use of BCM2835_CLOCK_COUNT in driver clk: bcm2835: reorganize bcm2835_clock_array assignment Martin Sperl (8): clk: bcm2835: documenentation: add graphiz bcm2835 clock tree clk: bcm2835: add missing PLL clock divider clk: bcm2835: add missing osc and per clocks clk: bcm2835: add the camera related clocks cam0, cam1 and ccp2 clk: bcm2835: add the dsi clocks clk: bcm2835: add arm clock clk: bcm2835: add gates that require PM_DEBUG to be set clk: bcm2835: add the testdebug clock generators Documentation/clk/bcrm,bcm2835-clock-tree.dot | 350 +++++++++++++++++++++++++ drivers/clk/bcm/clk-bcm2835.c | 329 ++++++++++++++++++++++- include/dt-bindings/clock/bcm2835.h | 30 +++ 3 files changed, 708 insertions(+), 1 deletion(-) create mode 100644 Documentation/clk/bcrm,bcm2835-clock-tree.dot -- 1.7.10.4 -- 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
