The 'sunxi-ng' proposal from Maxime Ripard did a great advance in handling the clocks of Allwinner's SoCs, but it appeared that it was not easy to extend its functions and handle some other SoCs as the A83T. This patch series proposes a more flexible and simpler structure. The basic idea is to have the same structure for all clocks. All parameters (multipliers, dividers, mux, gates..) may be defined or not in each clock. An 'extra' pointer permits to handle rare or specific functions. The notion of 'bus gates' appearing in previous drivers and DTs are of no interest outside the clock driver itself. So, this driver maps the bus gate and clock gate operations to the standard clock functions 'prepare/unprepare' and 'enable/disable'. The reset functions are included in this driver. As often, the resets occur at probe time, at the same time as the clock prepare calls, this driver optionally proposes to hide them by doing a 'reset and enable bus gate' on clock prepare (and same in inverse order on clock unprepare). This driver has been tested on a Banana Pi M3 (A83T): - working: UART0, USB0, MMC0, THS, video (DE + LCD1 + HDMI) - not tested yet: HDMI audio (the EDID cannot be read preventing audio to be enabled) - not working: MMC1 (wifi), MMC2 (eMMC) (sorry, Maxime, but I think that my implementation is easier to extend than yours) Jean-Francois Moine (3): clk: sunxi: Add a driver for the CCU clk: sunxi: Add the A83T clocks dt: sun8i: Define the clocks of the A83T Documentation/devicetree/bindings/clock/sunxi.txt | 7 +- arch/arm/boot/dts/sun8i-a83t.dtsi | 16 +- drivers/clk/sunxi/Makefile | 3 + drivers/clk/sunxi/ccu-sun8i-a83t.c | 858 +++++++++++++++++++ drivers/clk/sunxi/ccu.c | 980 ++++++++++++++++++++++ drivers/clk/sunxi/ccu.h | 153 ++++ include/dt-bindings/clock/sun8i-a83t.h | 97 +++ include/dt-bindings/reset/sun8i-a83t.h | 62 ++ 8 files changed, 2169 insertions(+), 7 deletions(-) create mode 100644 drivers/clk/sunxi/ccu-sun8i-a83t.c create mode 100644 drivers/clk/sunxi/ccu.c create mode 100644 drivers/clk/sunxi/ccu.h create mode 100644 include/dt-bindings/clock/sun8i-a83t.h create mode 100644 include/dt-bindings/reset/sun8i-a83t.h -- 2.9.0 -- 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
