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2004b7b180
In order to improve the main frequency of CPU, the clock path of CPU is
simplified as follows:
|--\
| \ |--\
--apll--|\ | \ | \
| |--apll_core--| \ | \
--24M---|/ |mux1 |--[gate]--|mux2|---clk_core
| / | /
--gpll--|\ | / |------| /
| |--gpll_core--| / | |--/
--24M---|/ |--/ |
|
-------apll_directly--------------|
When the CPU requests high frequency, we want to use MUX2 select the
"apll_directly".
At low frequencies use MUX1 to select “apll_core" and then MUX2 to
select "apll_core_gate".
However, in this way, the CPU frequency conversion needs to be
in the following order:
1. MUX2 select to "apll_core_gate", MUX1 select "gpll_core"
2. Apll sets slow_mode, sets APLL parameters, locks APLL, and then APLL
sets normal_mode
3. MUX1 select "apll_core", MUX2 select "apll_directly"
So add pre_mux and post_mux options to cover this special requirements.
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
[rebase]
Signed-off-by: Sebastian Reichel <sebastian.reichel@collabora.com>
Link: https://lore.kernel.org/r/20221018151407.63395-7-sebastian.reichel@collabora.com
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
|
||
|---|---|---|
| .. | ||
| clk-cpu.c | ||
| clk-ddr.c | ||
| clk-half-divider.c | ||
| clk-inverter.c | ||
| clk-mmc-phase.c | ||
| clk-muxgrf.c | ||
| clk-pll.c | ||
| clk-px30.c | ||
| clk-rk3036.c | ||
| clk-rk3128.c | ||
| clk-rk3188.c | ||
| clk-rk3228.c | ||
| clk-rk3288.c | ||
| clk-rk3308.c | ||
| clk-rk3328.c | ||
| clk-rk3368.c | ||
| clk-rk3399.c | ||
| clk-rk3568.c | ||
| clk-rv1108.c | ||
| clk-rv1126.c | ||
| clk.c | ||
| clk.h | ||
| Kconfig | ||
| Makefile | ||
| softrst.c | ||