AuxXxilium/linux_dsm_epyc7002
1
0
Fork 0
mirror of https://github.com/AuxXxilium/linux_dsm_epyc7002.git synced 2024-11-25 01:21:01 +07:00
Code Issues Actions Packages Projects Releases Wiki Activity
61c40f35f5
linux_dsm_epyc7002/drivers/clk
History
Gregory CLEMENT 61c40f35f5 clk: mvebu: armada-37xx-periph: Fix switching CPU rate from 300Mhz to 1.2GHz 
Switching the CPU from the L2 or L3 frequencies (300 and 200 Mhz
respectively) to L0 frequency (1.2 Ghz) requires a significant amount
of time to let VDD stabilize to the appropriate voltage. This amount of
time is large enough that it cannot be covered by the hardware
countdown register. Due to this, the CPU might start operating at L0
before the voltage is stabilized, leading to CPU stalls.

To work around this problem, we prevent switching directly from the
L2/L3 frequencies to the L0 frequency, and instead switch to the L1
frequency in-between. The sequence therefore becomes:

1. First switch from L2/L3(200/300MHz) to L1(600MHZ)
2. Sleep 20ms for stabling VDD voltage
3. Then switch from L1(600MHZ) to L0(1200Mhz).

It is based on the work done by Ken Ma <make@marvell.com>

Cc: stable@vger.kernel.org
Fixes: 2089dc33ea ("clk: mvebu: armada-37xx-periph: add DVFS support for cpu clocks")
Signed-off-by: Gregory CLEMENT <gregory.clement@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-07-09 09:44:06 -07:00
..
actions clk: actions: Add S900 SoC clock support 2018-04-06 14:26:48 -07:00
at91 clk: at91: PLL recalc_rate() now using cached MUL and DIV values 2018-05-15 23:38:31 -07:00
axis
axs10x clk: axs10x: introduce AXS10X pll driver 2017-07-17 11:50:59 -07:00
bcm treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
berlin This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
davinci clk: davinci: fix a typo (which leads to build failures) 2018-06-25 18:09:57 -05:00
h8300 clk: h8300: pr_err() strings should end with newlines 2017-12-06 22:40:02 -08:00
hisilicon Merge branches 'clk-imx7d', 'clk-hisi-stub', 'clk-mvebu', 'clk-imx6-epit' and 'clk-debugfs-simple' into clk-next 2018-06-04 12:32:28 -07:00
imgtec Update MIPS email addresses 2017-11-03 09:02:30 -07:00
imx This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
ingenic docs: Fix some broken references 2018-06-15 18:10:01 -03:00
keystone clk: keystone: sci-clk: add support for dynamically probing clocks 2018-03-08 11:43:15 +02:00
loongson1
mediatek Merge branches 'clk-hisi-usb', 'clk-silent-bulk', 'clk-mtk-hdmi', 'clk-mtk-mali' and 'clk-imx6ul-ccosr' into clk-next 2018-06-04 12:27:40 -07:00
meson clk: meson: audio-divider is one based 2018-06-21 10:10:50 +02:00
microchip
mmp We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
mvebu clk: mvebu: armada-37xx-periph: Fix switching CPU rate from 300Mhz to 1.2GHz 2018-07-09 09:44:06 -07:00
mxs clk: mxs: make clk_ops const 2017-11-01 23:25:43 -07:00
nxp clk: lpc32xx: Set name of regmap_config 2018-03-19 14:35:16 -07:00
pistachio
pxa clk: pxa: unbreak lookup of CLK_POUT 2017-12-28 10:43:30 -08:00
qcom clk/mmcc-msm8996: Make mmagic_bimc_gdsc ALWAYS_ON 2018-07-06 11:24:17 -07:00
renesas treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
rockchip clk: rockchip: remove deprecated gate-clk code and dt-binding 2018-05-23 13:19:06 +02:00
samsung This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
sirf We have two changes to the core framework this time around. The first being a 2017-11-17 20:04:24 -08:00
socfpga clk: socfpga: stratix10: suppress unbinding platform's clock driver 2018-05-15 14:54:52 -07:00
spear clk: spear: fix WDT clock definition on SPEAr600 2018-04-06 13:45:34 -07:00
sprd clk: sprd: add RTC gate for SC9860 2018-03-16 15:53:30 -07:00
st treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
sunxi treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
sunxi-ng clk: sunxi-ng: replace lib-y with obj-y 2018-06-21 08:17:56 -07:00
tegra treewide: kzalloc() -> kcalloc() 2018-06-12 16:19:22 -07:00
ti treewide: devm_kzalloc() -> devm_kcalloc() 2018-06-12 16:19:22 -07:00
uniphier clk: uniphier: add LD11/LD20 stream demux system clock 2018-05-15 14:15:43 -07:00
ux500 clk: ux500: Drop AB8540/9540 support 2018-03-23 09:36:11 -07:00
versatile clk: versatile: Remove WARNs in ->round_rate() 2018-03-16 15:31:16 -07:00
x86 clk: x86: Add ST oscout platform clock 2018-05-17 12:44:06 +02:00
zte clk: move clock common macros out from vendor directories 2017-12-21 15:00:38 -08:00
zynq
clk-asm9260.c treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
clk-aspeed.c clk: aspeed: Mark bclk (PCIe) and dclk (VGA) as critical 2018-07-06 13:48:07 -07:00
clk-axi-clkgen.c clk: axi-clkgen: Round closest in round_rate() and recalc_rate() 2017-12-21 18:07:53 -08:00
clk-axm5516.c
clk-bulk.c clk: bulk: silently error out on EPROBE_DEFER 2018-05-15 15:16:13 -07:00
clk-cdce706.c
clk-cdce925.c clk: cdce925: remove redundant check for non-null parent_name 2017-11-13 17:44:15 -08:00
clk-clps711x.c treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
clk-composite.c
clk-conf.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
clk-cs2000-cp.c clk: cs2000: mark resume function as __maybe_unused 2018-04-16 09:07:22 -07:00
clk-devres.c clk: add managed version of clk_bulk_get 2017-06-02 15:37:49 -07:00
clk-divider.c clk: divider: read-only divider can propagate rate change 2018-03-12 15:10:26 -07:00
clk-efm32gg.c treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
clk-fixed-factor.c
clk-fixed-rate.c
clk-fractional-divider.c clk: fractional-divider: allow overriding of approximation 2017-08-08 17:39:48 +02:00
clk-gate.c clk: gate: expose clk_gate_ops::is_enabled 2017-08-31 18:35:45 -07:00
clk-gemini.c treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
clk-gpio.c clk: clk-gpio: Allow GPIO to sleep in set/get_parent 2018-03-19 13:53:08 -07:00
clk-hi655x.c clk: hi6220: Add the hi655x's pmic clock 2017-04-21 19:18:53 -07:00
clk-highbank.c
clk-hsdk-pll.c ARC: clk: fix spelling mistake: "configurarion" -> "configuration" 2017-11-13 17:44:26 -08:00
clk-max77686.c
clk-moxart.c clk: Convert to using %pOF instead of full_name 2017-07-21 15:49:54 -07:00
clk-multiplier.c
clk-mux.c clk: honor CLK_MUX_ROUND_CLOSEST in generic clk mux 2018-04-16 09:25:07 -07:00
clk-nomadik.c clk: nomadik: Delete error messages for a failed memory allocation in two functions 2017-04-21 19:47:14 -07:00
clk-npcm7xx.c clk: npcm7xx: fix return value check in npcm7xx_clk_init() 2018-05-01 14:50:29 -07:00
clk-nspire.c
clk-oxnas.c
clk-palmas.c clk: palmas: undo preparation of a clock source. 2017-06-02 10:51:34 -07:00
clk-pwm.c
clk-qoriq.c clk: qoriq: add more divider clocks support 2017-12-21 15:57:28 -08:00
clk-rk808.c
clk-s2mps11.c treewide: Use struct_size() for devm_kmalloc() and friends 2018-06-06 11:15:43 -07:00
clk-scmi.c treewide: Use struct_size() for devm_kmalloc() and friends 2018-06-06 11:15:43 -07:00
clk-scpi.c clk: scpi: error when clock fails to register 2017-06-29 18:47:35 -07:00
clk-si514.c
clk-si544.c clk-si544: Properly round requested frequency to nearest match 2018-06-01 23:24:52 -07:00
clk-si570.c
clk-si5351.c clk: si5351: _si5351_clkout_reset_pll() can be static 2017-12-28 10:49:48 -08:00
clk-si5351.h
clk-stm32f4.c clk: stm32: Add clk entry for SDMMC2 on stm32F769 2018-03-19 13:46:07 -07:00
clk-stm32h7.c treewide: Use struct_size() for kmalloc()-family 2018-06-06 11:15:43 -07:00
clk-stm32mp1.c This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
clk-tango4.c License cleanup: add SPDX GPL-2.0 license identifier to files with no license 2017-11-02 11:10:55 +01:00
clk-twl6040.c clk: make clk_init_data const 2017-11-01 23:25:51 -07:00
clk-u300.c clk: clk-u300: Fix a typo in two comment lines 2017-11-13 17:39:43 -08:00
clk-versaclock5.c clk: vc5: Add support for IDT VersaClock 5P49V5925 2017-07-17 11:51:00 -07:00
clk-vt8500.c
clk-wm831x.c clk: make clk_init_data const 2017-11-01 23:25:51 -07:00
clk-xgene.c clk: clk-xgene: Adjust six checks for null pointers 2017-11-13 17:40:03 -08:00
clk.c clk: Really show symbolic clock flags in debugfs 2018-07-06 10:49:27 -07:00
clk.h clk: Move __clk_{get,put}() into private clk.h API 2018-01-04 15:13:29 -08:00
clkdev.c clk: Prepare to remove asm-generic/clkdev.h 2018-01-02 16:12:00 -08:00
Kconfig This time we have a good set of changes to the core framework that do some 2018-06-09 12:06:24 -07:00
Makefile clk: sunxi-ng: replace lib-y with obj-y 2018-06-21 08:17:56 -07:00