This driver supports the ast2500, ast2400 (and derivative) BMC SoCs from Aspeed.
This is version three of the series. Version one contained two patches; an update to the binding document and a single patch for the driver. Lee has merged the bindings change, so that is dropped from this series, and I split the driver out into a series of patches to make them easier to review. Version three addresses reivew from Andrew and has seen more testing on hardware. All of the important clocks are supported, with most non-essential ones also implemented where information is available. I am working with Aspeed to clear up some of the missing information, including the missing parent-sibling relationships. We need to know the rate of the apb clock in order to correctly program the clocksource driver, so the apb and it's parents are created in the CLK_OF_DECLARE_DRIVER callback. The rest of the clocks are created at normal driver probe time. I followed the Gemini driver's lead with using the regmap where I could, but also having a pointer to the base address for use with the common clock callbacks. The driver borrows from the clk_gate common clock infra spruce, but modifies it in order to support the clock gate and reset pair that most of the clocks have. This pair must be reset-ungated-released, with appropriate delays, according to the datasheet. The first patch introduces the core clock registration parts, and describes the clocks. The second creates the core clocks, giving the system enough to boot (but without uart). Next come the non-core clocks, and finally the reset controller that is used for the few cocks that don't have a gate to go with their reset pair. Please review! Cheers, Joel Joel Stanley (5): clk: Add clock driver for ASPEED BMC SoCs clk: aspeed: Register core clocks clk: aspeed: Add platform driver and register PLLs clk: aspeed: Register gated clocks clk: aspeed: Add reset controller drivers/clk/Kconfig | 12 + drivers/clk/Makefile | 1 + drivers/clk/clk-aspeed.c | 654 +++++++++++++++++++++++++++++++ include/dt-bindings/clock/aspeed-clock.h | 52 +++ 4 files changed, 719 insertions(+) create mode 100644 drivers/clk/clk-aspeed.c create mode 100644 include/dt-bindings/clock/aspeed-clock.h -- 2.14.1
