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The driver requests the current clk rate of each of its parent clocks to
decide whether a clock rate is suitable or not. It does not request
determine_rate from a parent clock which could request a rate change in
parent clock (i.e. there is no parent rate propagation).
We know the rate we want (passed along req argument of the function) and
the parent clock rate, thus we know the closest rounded divisor, we
don't need to iterate over the available divisors to find the best one
for a given clock.
Signed-off-by: Quentin Schulz <quentin.schulz@free-electrons.com>
Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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It fails to build once we introduce the ARCH_MB86S7X Kconfig symbol:
drivers/clk/clk-mb86s7x.c:27:10: fatal error: soc/mb86s7x/scb_mhu.h: No such file or directory
#include <soc/mb86s7x/scb_mhu.h>
^~~~~~~~~~~~~~~~~~~~~~~
compilation terminated.
And when commenting out that line, we get:
drivers/clk/clk-mb86s7x.c: In function 'crg_gate_control':
drivers/clk/clk-mb86s7x.c:72:8: error: implicit declaration of function 'mb86s7x_send_packet' [-Werror=implicit-function-declaration]
ret = mb86s7x_send_packet(CMD_PERI_CLOCK_GATE_SET_REQ,
^~~~~~~~~~~~~~~~~~~
drivers/clk/clk-mb86s7x.c:72:28: error: 'CMD_PERI_CLOCK_GATE_SET_REQ' undeclared (first use in this function)
ret = mb86s7x_send_packet(CMD_PERI_CLOCK_GATE_SET_REQ,
^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/clk/clk-mb86s7x.c:72:28: note: each undeclared identifier is reported only once for each function it appears in
drivers/clk/clk-mb86s7x.c: In function 'crg_rate_control':
drivers/clk/clk-mb86s7x.c:116:10: error: 'CMD_PERI_CLOCK_RATE_SET_REQ' undeclared (first use in this function)
code = CMD_PERI_CLOCK_RATE_SET_REQ;
^~~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/clk/clk-mb86s7x.c:121:10: error: 'CMD_PERI_CLOCK_RATE_GET_REQ' undeclared (first use in this function); did you mean 'CMD_PERI_CLOCK_RATE_SET_REQ'?
code = CMD_PERI_CLOCK_RATE_GET_REQ;
^~~~~~~~~~~~~~~~~~~~~~~~~~~
CMD_PERI_CLOCK_RATE_SET_REQ
drivers/clk/clk-mb86s7x.c: In function 'mhu_cluster_rate':
drivers/clk/clk-mb86s7x.c:276:10: error: 'CMD_CPU_CLOCK_RATE_GET_REQ' undeclared (first use in this function)
code = CMD_CPU_CLOCK_RATE_GET_REQ;
^~~~~~~~~~~~~~~~~~~~~~~~~~
drivers/clk/clk-mb86s7x.c:278:10: error: 'CMD_CPU_CLOCK_RATE_SET_REQ' undeclared (first use in this function); did you mean 'CMD_CPU_CLOCK_RATE_GET_REQ'?
code = CMD_CPU_CLOCK_RATE_SET_REQ;
^~~~~~~~~~~~~~~~~~~~~~~~~~
CMD_CPU_CLOCK_RATE_GET_REQ
cc1: some warnings being treated as errors
scripts/Makefile.build:302: recipe for target
'drivers/clk/clk-mb86s7x.o' failed
make[2]: *** [drivers/clk/clk-mb86s7x.o] Error 1
Remove the driver for now.
Signed-off-by: Andreas Färber <afaerber@suse.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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strrchr can potentially return a null so the following strlen on the
null pointer can cause a null dereference. Add a check to see if
the string postfix is not null before calling strlen.
Detected by CoverityScan, CID#1452039 ("Dereference null return")
Signed-off-by: Colin Ian King <colin.king@canonical.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Add a check for error returned by divider value calculation to avoid
writing error code into hw register.
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Fixes: bca9690b9426 ("clk: divider: Make generic for usage elsewhere")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Add a clock for video input subsystem (EXIV) on
UniPhier LD11/LD20 SoCs.
Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Add clock for audio subsystem (AIO) and SoC internal audio codec
(EVEA) on UniPhier LD11/LD20 SoCs.
Signed-off-by: Katsuhiro Suzuki <suzuki.katsuhiro@socionext.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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This patch enables clocks for STM32H743 boards.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
for MFD changes:
Acked-by: Lee Jones <lee.jones@linaro.org>
for DT-Bindings
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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This patch exposes clk_gate_ops::is_enabled as functions
that can be directly called and assigned in places like this so
we don't need wrapper functions that do nothing besides forward
the call.
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Suggested-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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We need to export clk_gate_is_enabled() from clk framework, then
to avoid compilation issue we have to rename clk_gate_is_enabled()
in NXP LPC32xx clock driver.
We changed all gate op with 'lpc32xx_' prefix:
lpc32xx_clk_gate_enable(),
lpc32xx_clk_gate_disable(),
lpc32xx_clk_gate_is_enabled().
Signed-off-by: Gabriel Fernandez <gabriel.fernandez@st.com>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Add basic clock data for Socionext's new SoC PXs3.
Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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The old code uses tcxo (19.2MHz) as watchdog clock but actually the
watchdog uses 32K clock, as result the watchdog timeout cannot be set
correctly and delay long time to reset SoC.
So this patch is to use 'ref32k' as clock source for watchdog.
Fixes: 72ea48610d43 ("clk: hi6220: Clock driver support for Hisilicon hi6220 SoC")
Signed-off-by: Leo Yan <leo.yan@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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The RK808 and RK805 PMICs are using a similar register map.
We can reuse the clk driver for the RK805 PMIC. So let's add
the RK805 in the Kconfig description.
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Joseph Chen <chenjh@rock-chips.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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This patch adds the common function to reset the clk rate in order to
be able to use it in other cases.
Signed-off-by: Gaku Inami <gaku.inami.xw@bp.renesas.com>
Signed-off-by: Hiroyuki Yokoyama <hiroyuki.yokoyama.vx@renesas.com>
Signed-off-by: Yoshihiro Kaneko <ykaneko0929@gmail.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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This propagates rate requests from the display interface to the divider
or PLL output, allowing to hit the required display rate in many more
cases.
Signed-off-by: Lucas Stach <l.stach@pengutronix.de>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Tested-By: Wladimir J. van der Laan <laanwj@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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gcc-8 reports an uninitialized variable access in a code path
that we would see with incorrect DTB input:
drivers/clk/sunxi/clk-sun8i-bus-gates.c: In function 'sun8i_h3_bus_gates_init':
drivers/clk/sunxi/clk-sun8i-bus-gates.c:85:27: error: 'clk_parent' may be used uninitialized in this function [-Werror=maybe-uninitialized]
This works around by skipping invalid input and printing a warning
instead if it ever happens. The problem was apparently part of the
initiali driver submission, but older compilers don't notice it.
Fixes: ab6e23a4e388 ("clk: sunxi: Add H3 clocks support")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Make this const as it is only stored in the const field of a
clk_init_data structure.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Liviu Dudau <Liviu.Dudau@arm.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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HSDK board manages its clocks using various PLLs. These PLL have same
dividers and corresponding control registers mapped to different addresses.
So we add one common driver for such PLLs.
Each PLL on HSDK board consists of three dividers: IDIV, FBDIV and
ODIV. Output clock value is managed using these dividers.
We add pre-defined tables with supported rate values and appropriate
configurations of IDIV, FBDIV and ODIV for each value.
As of today we add support for PLLs that generate clock for the
HSDK arc cpus, system, ddr, AXI tunnel and hdmi.
By this patch we add support for several plls (arc cpus pll and others),
so we had to use two different init types: CLK_OF_DECLARE for arc cpus pll
and regular probing for others plls.
Signed-off-by: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com>
Reviewed-by: Vineet Gupta <vgupta@synopsys.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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clk_div_table are not supposed to change at runtime. All functions
working with clk_div_table provided by <linux/clk-provider.h> work
with const clk_div_table. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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clk_div_table are not supposed to change at runtime. All functions
working with clk_div_table provided by <linux/clk-provider.h> work
with const clk_div_table. So mark the non-const structs as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Add clock control for ethernet controller on Pro4, PXs2, LD11 and LD20.
Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com>
Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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This bit is pin control, and needs to be carefully managed by the
new pin control driver.
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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clk_ops are not supposed to change at runtime. All functions
working with clk_ops provided by <linux/clk-provider.h> work
with const clk_ops. So mark the non-const clk_ops as const.
Here, Function "clk_reg_prcc" is used to initialized clk_init_data.
clk_init_data is working with const clk_ops. So make clk_reg_prcc
non-const clk_ops argument as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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clk_ops are not supposed to change at runtime. All functions
working with clk_ops provided by <linux/clk-provider.h> work
with const clk_ops. So mark the non-const clk_ops as const.
Here, Function "clk_reg_sysctrl" is used to initialized clk_init_data.
clk_init_data is working with const clk_ops. So make clk_reg_sysctrl
non-const clk_ops argument as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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clk_ops are not supposed to change at runtime. All functions
working with clk_ops provided by <linux/clk-provider.h> work
with const clk_ops. So mark the non-const clk_ops as const.
Here, Function "clk_reg_prcmu" is used to initialized clk_init_data.
clk_init_data is working with const clk_ops. So make clk_reg_prcmu
non-const clk_ops argument as const.
Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com>
Acked-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Introduce a clock controller driver for sun4i A10 and sun7i A20
series SoCs.
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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Allwinner A10 is now driven by sunxi-ng CCU driver.
Add devicetree binding for it.
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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Allwinner A20 is now driven by sunxi-ng CCU driver.
Add devicetree binding for it.
Acked-by: Rob Herring <robh@kernel.org>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Priit Laes <plaes@plaes.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
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This patch adds missing LPASS smmu clks which are required by the audio driver.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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- Added necessary delays in PLLU enable sequence during initialization
- Applied PLLU lock to all secondary gates (PLLU_48M and PLLU_60M were
missing).
Signed-off-by: Alex Frid <afrid@nvidia.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Increased Tegra210 UTMIPLL power on delay to 20us (spec maximum is 15us).
Also remove a few empty lines to make it more clear the ACTIVE_DLY_COUNT
and ENABLE_DLY_COUNT fields.
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Switched Tegra210 PLLRE registration to common PLL ops instead of special
PLLRE ops used on previous Tegra chips. The latter ops do not follow
chip specific PLL frequency table, and do not apply chip specific rate
calculation method.
Removed unnecessary default rate setting that duplicates h/w reset
state, and is overwritten by clock initialization, anyway.
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Remove from Tegra210 PLLSS registration code sections that
- attempt to set PLL minimum rate (unnecessary, and dangerous if PLL
is already enabled on boot)
- apply pre-Tegra210 defaults settings
- check IDDQ setting (duplicated with Tegra210 PLLSS check defaults)
Replaced setting of reference clock with check that default oscillator
selection is not changed, and failed registration otherwise as validation
was only done with the oscillator as the reference clock.
Reordered registration, so that PLL initialization is called after
VCOmin adjustment.
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Tegra210 PLLX uses the same sequences than then PLLC instances. So there
is no need to have a special registration function and ops struct for it.
Simplify the code by changing all references to the Tegra210 PLLX
registration function to the Tegra210 PLLC registration function and
avoid duplicate functionality.
Based on work by Alex Frid <afrid@nvidia.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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If the PLL is on, only warn if the defaults are not yet set. Otherwise be
silent.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Timo Alho <talho@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Increase delay after PLL IDDQ release to 5us per PLL specifications.
based on work by Alex Frid <afrid@nvidia.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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I2C controllers are also on the APB bus and therefor need this flag to handle
resets correctly.
Signed-off-by: Alex Frid <afrid@nvidia.com>
Reviewed-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Don't take the fractional part into account to calculate the effective
NDIV if fractional ndiv is not enabled.
Signed-off-by: Alex Frid <afrid@nvidia.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Not all fields are read from the hw depending on the PLL type. Make sure
the other fields are 0 by clearing the structure beforehand to prevent
users such as the rate re-calculation code from using bogus values.
Based on work by Alex Frid <afrid@nvidia.com>
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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PLLD2 is used for HDMI which does not allow Spread Spectrum clocking.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Make sure the pll_ss ops are compiled even when only building for Tegra210.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Shreshtha Sahu <ssahu@nvidia.com>
Tested-by: Shreshtha Sahu <ssahu@nvidia.com>
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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PLL SS was only controlled when setting the PLL rate, not when the PLL itself
is enabled or disabled.
Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com>
Reviewed-by: Jon Mayo <jmayo@nvidia.com>
Tested-by: Thierry Reding <treding@nvidia.com>
Acked-by: Thierry Reding <treding@nvidia.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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The clock bimc_gpu_clk_src is incorrectly set to use the shared rcg2
ops, which are for RCGs with child branches controlled by different
CPUs.
The result of the incorrect ops is that the GPU's PM runtime may leave
this clock set at a very low rate. Fix this issue by using the correct
rcg2 ops.
Fixes: a2e8272f3f89 ("clk: qcom: Add MSM8916 gpu clocks")
Signed-off-by: Georgi Djakov <georgi.djakov@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Make these const as they are only stored in the const field of a
clk_init_data structure.
Signed-off-by: Bhumika Goyal <bhumirks@gmail.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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Silence the sparse warning
clk/rockchip/clk.c:172:6: warning: symbol 'rockchip_fractional_approximation' was not declared. Should it be static?
Cc: Elaine Zhang <zhangqing@rock-chips.com>
Cc: Heiko Stuebner <heiko@sntech.de>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
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The source clock ordering is wrong, as shown in the TRM:
cru_sel24_con[8]
rmii_extclk_sel
clock source select control register
1'b0: from internal PLL
1'b1: from external IO
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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This MAC has no internal phy for rv1108 and the whole clock
infrastructure hasn't been used yet, so is safe to fix.
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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Add gmac aclk and pclk clock gates.
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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In some special circumstances, may be need to reparent clk for sclk_sdio_src.
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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This patch exports gmac aclk and pclk for dts reference.
Signed-off-by: Elaine Zhang <zhangqing@rock-chips.com>
Reviewed-by: David Wu <david.wu@rock-chips.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
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