Commit Graph

7 Commits

Author SHA1 Message Date
Heiko Stübner b9e4ba5416 clk: rockchip: add clock controller for rk3288
Add the clock tree definition for the new rk3288 SoC.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-By: Max Schwarz <max.schwarz@online.de>
Tested-By: Max Schwarz <max.schwarz@online.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-13 12:17:10 -07:00
Heiko Stübner 2c14736c75 clk: rockchip: add clock driver for rk3188 and rk3066 clocks
This adds a clock driver that handles the specific muxes, dividers and gates
of rk3188 and rk3066 SoCs.

The structure of the clock list resembles the arrangement of their
counterparts in the clock architecture diagrams found in the SoC
documentation.

Clocks exported to the clock provider are currently limited to well known
or measured ones. So additional clock exports may be necessary in the future.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-By: Max Schwarz <max.schwarz@online.de>
Tested-By: Max Schwarz <max.schwarz@online.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-13 12:17:09 -07:00
Heiko Stübner 85fa0c7f8d clk: rockchip: add reset controller
All Rockchip SoCs at least down to the ARM9-based RK28xx include the reset-
controller for SoC peripherals in their clock controller.
While the older SoCs (ARM9 and Cortex-A8) use a regular scheme to change
register values, the Cortex-A9 SoCs use a hiword-mask making locking unecessary.
To be compatible with both schemes the reset controller takes a flag to
decide which scheme to use, similar to the other HIWORD_MASK flags used in the
clock framework.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-By: Max Schwarz <max.schwarz@online.de>
Tested-By: Max Schwarz <max.schwarz@online.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-13 12:17:07 -07:00
Heiko Stübner 90c5902540 clk: rockchip: add clock type for pll clocks and pll used on rk3066
All known Rockchip SoCs down to the RK28xx (ARM9) use a similar pattern to
handle their plls:
                       |--\
xin32k ----------------|mux\
xin24m -----| pll |----|pll|--- pll output
       \---------------|src/
                       |--/

The pll output is sourced from 1 of 3 sources, the actual pll being one of
them. To change the pll frequency it is imperative to remux it to another
source beforehand. This is done by adding a clock-listener to the pll that
handles the remuxing before and after the rate change.

The output mux is implemented as a separate clock to make use of already
existing common-clock features for disabling the pll if one of the other
two sources is used.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-By: Max Schwarz <max.schwarz@online.de>
Tested-By: Max Schwarz <max.schwarz@online.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-13 12:17:06 -07:00
Heiko Stübner a245fecbb8 clk: rockchip: add basic infrastructure for clock branches
This adds infrastructure for registering clock branches. On Rockchip SoCs
most clock branches are a combination of mux,divider and gate components,
thus a composite clock is used when appropriate.

Clock branches are supposed to be declared in an array using the COMPOSITE*
or MUX, etc makros defined in the header and then registered using
rockchip_clk_register_branches.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Acked-By: Max Schwarz <max.schwarz@online.de>
Tested-By: Max Schwarz <max.schwarz@online.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2014-07-13 12:17:06 -07:00
Rob Herring 5c46f43f08 clk: rockchip: fix function type for CLK_OF_DECLARE
Adding function type checking to CLK_OF_DECLARE found a type mismatch with
rk2928_gate_clk_init. The function only takes a single struct device_node
parameter.

Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
2014-05-20 14:25:22 -05:00
Heiko Stübner 646572c77d clk: add support for Rockchip gate clocks
This adds basic support for gate-clocks on Rockchip SoCs.
There are 16 gates in each register and use the HIWORD_MASK
mechanism for changing gate settings.

The gate registers form a continuos block which makes the dt node
structure a matter of taste, as either all 160 gates can be put into
one gate clock spanning all registers or they can be divided into
the 10 individual gates containing 16 clocks each.
The code supports both approaches.

Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-06-20 15:58:27 -07:00