Thomas Petazzoni ee2d8ea1e9 clk: mvebu: extend clk-cpu for dynamic frequency scaling ... This commit extends the existing clk-cpu driver used on Marvell Armada XP platforms to support the dynamic frequency scaling of the CPU clock. Non-dynamic frequency change was already supported (and used before secondary CPUs are started), but the dynamic frequency change requires a completely different procedure. In order to achieve this, the clk_cpu_set_rate() function is reworked to handle two separate cases: - The case where the clock is enabled, which is the new dynamic frequency change code, implemented in clk_cpu_on_set_rate(). This part will be used for cpufreq activities. - The case where the clock is disabled, which is the existing frequency change code, moved in clk_cpu_off_set_rate(). This part is already used to set the clock frequency of the secondary CPUs before starting them. In order to implement the dynamic frequency change function, we need to access the PMU DFS registers, which are outside the currently mapped "Clock Complex" registers, so a new area of registers is now mapped. This affects the Device Tree binding, but we are careful to do it in a backward-compatible way (by allowing the second pair of registers to be non-existent, and in this case, ensuring clk_cpu_on_set_rate() returns an error). Note that technically speaking, the clk_cpu_on_set_rate() does not do the entire procedure needed to change the frequency dynamically, as it involves touching a number of PMSU registers. This is done through a clock notifier registered by the PMSU driver in followup commits. Cc: <devicetree@vger.kernel.org> Signed-off-by: Thomas Petazzoni <thomas.petazzoni@free-electrons.com> Link: https://lkml.kernel.org/r/1404920715-19834-4-git-send-email-thomas.petazzoni@free-electrons.com Signed-off-by: Jason Cooper <jason@lakedaemon.net>		2014-07-16 12:58:38 +00:00
..
at91	clk: at91: add slow clks driver	2014-05-07 18:27:45 +02:00
bcm	clk: bcm/kona: implement determine_rate()	2014-05-27 17:34:32 -07:00
berlin	clk: berlin: add core clock driver for BG2Q	2014-05-29 09:30:19 -07:00
hisilicon	clk: hisi: add clk-hix5hd2.c	2014-05-12 11:30:32 +08:00
keystone
mmp	clk: mmp: try to use closer one when do round rate	2014-03-26 20:59:27 -07:00
mvebu	clk: mvebu: extend clk-cpu for dynamic frequency scaling	2014-07-16 12:58:38 +00:00
mxs
qcom	clk: qcom: Return error pointers for unimplemented clocks	2014-05-29 09:30:25 -07:00
rockchip	clk: rockchip: fix function type for CLK_OF_DECLARE	2014-05-20 14:25:22 -05:00
samsung	The clock framework changes for 3.16 are pretty typical: mostly clock	2014-06-07 20:27:30 -07:00
shmobile	clk: shmobile: Add R8A7740-specific clock support	2014-05-23 13:38:25 -07:00
sirf	clk: sirf: update copyright years to 2014	2014-03-26 21:47:35 -07:00
socfpga	Adds support getting the divider registers for the MAIN PLL that was once	2014-05-12 19:11:13 -07:00
spear
st	clk: st: Terminate of match table	2014-05-28 12:08:53 -07:00
sunxi	clk: sunxi: add PRCM (Power/Reset/Clock Management) clks support	2014-06-11 10:25:02 +02:00
tegra	Merge branch 'clk-fixes' into clk-next	2014-05-28 00:15:10 -07:00
ti	This pull request contains the second half the of the clk changes for	2014-06-15 16:02:20 -10:00
ux500
versatile	The clock framework changes for 3.16 are pretty typical: mostly clock	2014-06-07 20:27:30 -07:00
x86
zynq	clk: zynq: Leave debug clocks in bootup state	2014-04-22 13:10:18 +02:00
clk-axi-clkgen.c
clk-axm5516.c	clk: Add clock driver for AXM55xx SoC	2014-05-22 22:06:14 -07:00
clk-bcm2835.c
clk-composite.c
clk-devres.c
clk-divider.c	clk: divider: Fix overflow in clk_divider_bestdiv	2014-05-27 19:16:24 -07:00
clk-efm32gg.c
clk-fixed-factor.c
clk-fixed-rate.c
clk-fractional-divider.c	clk: new basic clk type for fractional divider	2014-05-20 13:34:02 +02:00
clk-gate.c
clk-highbank.c
clk-ls1x.c
clk-max77686.c
clk-moxart.c
clk-mux.c
clk-nomadik.c
clk-nspire.c
clk-ppc-corenet.c
clk-s2mps11.c	clk: s2mps11: Add support for S2MPS14 clocks	2014-05-23 15:44:03 -07:00
clk-si570.c	clk: si570: Fix email address specifiction	2014-05-20 16:18:18 +02:00
clk-si5351.c
clk-si5351.h
clk-twl6040.c
clk-u300.c	clk: u300: Terminate of match table	2014-05-27 18:29:04 -07:00
clk-vt8500.c
clk-wm831x.c
clk-xgene.c
clk.c	clk: export __clk_round_rate for providers	2014-06-03 10:38:16 -07:00
clk.h	clk: Add of_clk_get_by_clkspec() helper	2014-05-22 15:54:59 -07:00
clkdev.c	clk: Add of_clk_get_by_clkspec() helper	2014-05-22 15:54:59 -07:00
Kconfig	The clock framework changes for 3.16 are pretty typical: mostly clock	2014-06-07 20:27:30 -07:00
Makefile	The clock framework changes for 3.16 are pretty typical: mostly clock	2014-06-07 20:27:30 -07:00