We'd like to privatize __clk_get(), but the sunxi clk driver is
calling this function to keep a reference held on the clk and
call clk_prepare_enable() on it. We support this design in the
clk core now with the CLK_IS_CRITICAL flag, so let's just use
that instead.
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Now that we have a custom printf format specifier, convert users of
full_name to use %pOF instead. This is preparation to remove storing
of the full path string for each node.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
Cc: Alexandre Torgue <alexandre.torgue@st.com>
Cc: Russell King <linux@armlinux.org.uk>
Cc: Matthias Brugger <matthias.bgg@gmail.com>
Cc: Geert Uytterhoeven <geert+renesas@glider.be>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Jonathan Hunter <jonathanh@nvidia.com>
Cc: Tero Kristo <t-kristo@ti.com>
Cc: linux-clk@vger.kernel.org
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-mediatek@lists.infradead.org
Cc: linux-renesas-soc@vger.kernel.org
Cc: linux-tegra@vger.kernel.org
Cc: linux-omap@vger.kernel.org
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Acked-by: James Liao <jamesjj.liao@mediatek.com>
Acked-by: Alexandre TORGUE <alexandre.torgue@st.com>
Reviewed-by: Matthias Brugger <matthias.bgg@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
commit cfa6368860 ("clk: sunxi: factors: Consolidate get_factors
parameters into a struct") introduced a regression for m factor
computation in sun4i_get_apb1_factors function.
The old code reassigned the "parent_rate" parameter to the targeted
divisor value and was buggy for the returned frequency but not for the
computed factors. Now, returned frequency is good but m factor is
incorrectly computed (its max value 31 is always set resulting in a
significantly slower frequency than the requested one...)
This patch simply restores the original proper computation for m while
keeping the good changes for returned rate.
Fixes: cfa6368860 ("clk: sunxi: factors: Consolidate get_factors parameters into a struct")
Signed-off-by: Stéphan Rafin <stephan@soliotek.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Currently, the sunxi clock driver gets the name for the base factor clock
of divs clocks from the name field in factors_data. This prevents reusing
of the factor clock for clocks with same properties, but different name.
This commit makes the divs setup function try to get a name from
clock-output-names in the devicetree. It also removes the name field where
possible and merges the sun4i PLL5 and PLL6 clocks.
[Andre: Make temporary name allocation dynamic.]
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Add the clock type which is used by the sun6i/8i families for video display.
Signed-off-by: Jean-Francois Moine <moinejf@free.fr>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
We catch errors in the base clock registration, failure to ioremap
and failures in the final of_clk_add_provider() call.
Also we unmap the registers when we need to rollback.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
We now report a failing ioremap, failing output names parsing,
failures in table registration and in the final step.
Also there was a bug where clk_register_divider_table() would return
an ERR_PTR value instead of NULL, which we were checking for.
We now implement proper rollback in case of an error.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
We now catch and report a failing ioremap, also a failure in the final
step of the clock registration is now handled and reported.
Also warnings are turned into errors.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Now that our protection code doesn't use the global name lookup anymore, we
can remove the clkdev registrations.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The current clock registration and protection code has a few drawbacks, the
two main ones being that we create a lot of orphans clock in the
registration phase, which will be troublesome when we will start being less
relaxed about them.
The protection code also relies on clkdev, which we don't really use but
for this particular case.
Fix both at the same time by moving everyone to the CLK_OF_DECLARE that
will probe our clock tree in the right and thus avoid orphans, and by
protecting directly the clock returned by our registration function.
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
All the data structure that we pass to the clocks setup functions are
declared const, while our setup functions expects a regular pointer. This
was hidden by the fact that we cast a void * pointer back to these
structures, which made it go unnoticed.
Fix the functions prototype.
Acked-by: Chen-Yu Tsai <wens@csie.org>
Reviewed-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The clocks registration code in clk-sunxi was most of the time not
returning the struct clk (or struct clk array) that was registered,
preventing the users of such functions to manipulate it, for example to
protect it.
Make them return it so that we can start using it.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
clk_register_mux returns a pointer wrapped error value in case of
failure, so a simple NULL check is not sufficient to catch errors.
Fix that and elaborate on the failure reason on the way. The whole
function does not return any error value, so silently failing may
leave users scratching their heads because the kernel does not
provide any clues on what's wrong.
Signed-off-by: Andre Przywara <andre.przywara@arm.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The factors clk implementation has been extended to support custom
recalc callbacks to support clocks that use one factor for certain
parents only, like a pre-divider.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The .get_factors callback of factors_clk has 6 parameters. To extend
factors_clk in any way that requires adding parameters to .get_factors
would make that list even longer, not to mention changing all the
function declarations.
Do this once now and consolidate all the parameters into a struct.
Also drop the space before function pointer arguments, since checkpatch
complains.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
struct clk_factors_config contains shifts/widths for the factors of
the factors clk. This is used to read out the factors from the register
value. In no case is it written to, so make it const.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The H3 clock control unit is similar to the those of other sun8i family
members like the A23.
It adds a new bus gates clock similar to the simple gates, but with a
different parent clock for each single gate.
Some of the gates use the new AHB2 clock as parent, whose clock source
is muxable between AHB1 and PLL6/2. The documentation isn't totally clear
about which devices belong to AHB2 now, especially USB EHIC/OHIC, so it
is mostly based on Allwinner kernel source code.
Signed-off-by: Jens Kuske <jenskuske@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The R8 is a new Allwinner SoC based on the A13. While both are very
similar, there's still a few differences. Introduce a new compatible to
deal with them.
In order to have a consistent naming, instead of mentioning the Allwinner
A series as the machine name, switch to sun4i/sun5i like what is done for
the other families.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
and the addition of new clock drivers. Stephen Boyd has also done a lot
of subsystem-wide driver clean-ups (thanks!). There are also fixes to
the framework core and changes to better split clock provider drivers
from clock consumer drivers.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=QAiQ
-----END PGP SIGNATURE-----
Merge tag 'clk-for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk updates from Michael Turquette:
"The clk framework changes for 4.3 are mostly updates to existing
drivers and the addition of new clock drivers. Stephen Boyd has also
done a lot of subsystem-wide driver clean-ups (thanks!). There are
also fixes to the framework core and changes to better split clock
provider drivers from clock consumer drivers"
* tag 'clk-for-linus-4.3' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (227 commits)
clk: s5pv210: add missing call to samsung_clk_of_add_provider()
clk: pistachio: correct critical clock list
clk: pistachio: Fix PLL rate calculation in integer mode
clk: pistachio: Fix override of clk-pll settings from boot loader
clk: pistachio: Fix 32bit integer overflows
clk: tegra: Fix some static checker problems
clk: qcom: Fix MSM8916 prng clock enable bit
clk: Add missing header for 'bool' definition to clk-conf.h
drivers/clk: appropriate __init annotation for const data
clk: rockchip: register pll mux before pll itself
clk: add bindings for the Ux500 clocks
clk/ARM: move Ux500 PRCC bases to the device tree
clk: remove duplicated code with __clk_set_parent_after
clk: Convert __clk_get_name(hw->clk) to clk_hw_get_name(hw)
clk: Constify clk_hw argument to provider APIs
clk: Hi6220: add stub clock driver
dt-bindings: clk: Hi6220: Document stub clock driver
dt-bindings: arm: Hi6220: add doc for SRAM controller
clk: atlas7: fix pll missed divide NR in fraction mode
clk: atlas7: fix bit field and its root clk for coresight_tpiu
...
We're removing struct clk from the clk provider API, so switch
this code to using the clk_hw based provider APIs.
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: "Emilio López" <emilio@elopez.com.ar>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Mostly converted with the following snippet:
@@
struct clk_hw *E;
@@
-__clk_get_flags(E->clk)
+clk_hw_get_flags(E)
Acked-by: Tero Kristo <t-kristo@ti.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Max Filippov <jcmvbkbc@gmail.com>
Acked-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Cc: Daniel Thompson <daniel.thompson@linaro.org>
Cc: Coquelin <mcoquelin.stm32@gmail.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The gates were handled with a common piece of framework that was
registering all gates array, that was not using the CLK_OF_DECLARE logic,
and was not using clock-indices but some private masks that were pretty
much equivalent.
Move this code in a new driver that handles all the gates array and solves
both these issues.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
[sboyd@codeaurora.org: Include clk.h for consumer API usage]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
* cleanup-clk-h-includes: (62 commits)
clk: Remove clk.h from clk-provider.h
clk: h8300: Remove clk.h and clkdev.h includes
clk: at91: Include clk.h and slab.h
clk: ti: Switch clk-provider.h include to clk.h
clk: pistachio: Include clk.h
clk: ingenic: Include clk.h
clk: si570: Include clk.h
clk: moxart: Include clk.h
clk: cdce925: Include clk.h
clk: Include clk.h in clk.c
clk: zynq: Include clk.h
clk: ti: Include clk.h
clk: sunxi: Include clk.h and remove unused clkdev.h includes
clk: st: Include clk.h
clk: qcom: Include clk.h
clk: highbank: Include clk.h
clk: bcm: Include clk.h
clk: versatile: Remove clk.h and clkdev.h includes
clk: ux500: Remove clk.h and clkdev.h includes
clk: tegra: Properly include clk.h
...
Use of_clk_parent_fill to fill in the parent clock names' array.
Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: "Emilio López" <emilio@elopez.com.ar>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Some determine_rate implementations are not returning an error
when they failed to adapt the rate according to the rate request.
Fix them so that they return an error instead of silently
returning 0.
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
CC: Jonathan Corbet <corbet@lwn.net>
CC: Tony Lindgren <tony@atomide.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: "Emilio López" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Tero Kristo <t-kristo@ti.com>
CC: Peter De Schrijver <pdeschrijver@nvidia.com>
CC: Prashant Gaikwad <pgaikwad@nvidia.com>
CC: Stephen Warren <swarren@wwwdotorg.org>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Alexandre Courbot <gnurou@gmail.com>
CC: linux-doc@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-omap@vger.kernel.org
CC: linux-mips@linux-mips.org
CC: linux-tegra@vger.kernel.org
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Clock rates are stored in an unsigned long field, but ->determine_rate()
(which returns a rounded rate from a requested one) returns a long
value (errors are reported using negative error codes), which can lead
to long overflow if the clock rate exceed 2Ghz.
Change ->determine_rate() prototype to return 0 or an error code, and pass
a pointer to a clk_rate_request structure containing the expected target
rate and the rate constraints imposed by clk users.
The clk_rate_request structure might be extended in the future to contain
other kind of constraints like the rounding policy, the maximum clock
inaccuracy or other things that are not yet supported by the CCF
(power consumption constraints ?).
Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
CC: Jonathan Corbet <corbet@lwn.net>
CC: Tony Lindgren <tony@atomide.com>
CC: Ralf Baechle <ralf@linux-mips.org>
CC: "Emilio López" <emilio@elopez.com.ar>
CC: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Tero Kristo <t-kristo@ti.com>
CC: Peter De Schrijver <pdeschrijver@nvidia.com>
CC: Prashant Gaikwad <pgaikwad@nvidia.com>
CC: Stephen Warren <swarren@wwwdotorg.org>
CC: Thierry Reding <thierry.reding@gmail.com>
CC: Alexandre Courbot <gnurou@gmail.com>
CC: linux-doc@vger.kernel.org
CC: linux-kernel@vger.kernel.org
CC: linux-arm-kernel@lists.infradead.org
CC: linux-omap@vger.kernel.org
CC: linux-mips@linux-mips.org
CC: linux-tegra@vger.kernel.org
[sboyd@codeaurora.org: Fix parent dereference problem in
__clk_determine_rate()]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Tested-by: Romain Perier <romain.perier@gmail.com>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
[sboyd@codeaurora.org: Folded in fix from Heiko for fixed-rate
clocks without parents or a rate determining op]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This clock provider uses the consumer API, so include clk.h
explicitly. Also remove clkdev.h in files that aren't using it
and include slab.h when clkdev.h was being used to implicitly
include it.
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
A bunch of defconfig changes, and some patches to make the Allwinner H3 and
A33 boot properly.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=m0CY
-----END PGP SIGNATURE-----
Merge tag 'sunxi-late-for-4.2' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into fixes
Merge "Allwinner late changes for 4.2" from Maxime Ripard:
Allwinner late changes for 4.2
A bunch of defconfig changes, and some patches to make the Allwinner H3 and
A33 boot properly.
* tag 'sunxi-late-for-4.2' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
ARM: sunxi: Enable simplefb in the defconfig
ARM: Remove deprecated symbol from defconfig files
ARM: sunxi: Add Machine support for A33
ARM: sunxi: Introduce Allwinner H3 support
Documentation: sunxi: Update Allwinner SoC documentation
Add machine support for the Allwinner A33 quad core cortex-a7 based SoC,
which is similar to the A23 SoC.
Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Chen-Yu Tsai <wens@csie.org>
of_io_request_and map returns an error pointer, but the current code assumes
that on error the returned pointer will be NULL.
Obviously, that makes the check completely useless. Change the test to actually
check for the proper error code.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-clk@vger.kernel.org
The pll6 has a /4 output that is used as an input to the ahb mux clock.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The current sunxi clock driver has the base factor clock of divs clocks
as the last clock output of the clock node. This makes it rather difficult
to add new outputs, such as fixed dividers, which were previously unknown.
This patch makes the divs clocks data structure specify which output is
the factor clock, and updates all current divs clocks accordingly.
We can then add new outputs after the factor clocks, at least not breaking
backward compatibility with regards to the devicetree bindings.
Also replace kzalloc with kcalloc in sunxi_divs_clk_setup().
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
We want to reparent AHB clock to PLL6 on sun5i/sun7i using the assigned
clocks properties. AHB is a factor clock, while PLL6 is a divs clock.
Register divs clocks before factor clocks so reparenting works. This
is only needed because we do the reparenting on the clock provider.
The proper way to fix this is to split out all the old sunxi clocks
into separate CLK_OF_DECLARE statements, like we are doing for sun9i.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Now that the ahb clock on sun5i/sun7i is muxable, ahb is no longer
guaranteed to be a child of the cpu clock. Add the cpu clock to
the list of protected clocks so it doesn't get disabled.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The AHB clock on sun5i and sun7i are muxable divider clocks.
Use a factors clock to support them.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The USB clocks originally shared code with the gates clocks, but had
additional reset controllers. Move these to a separate file. This will
allow us to add new support for slightly different USB clocks, such as
on the A80, without affecting gates clocks, and also facilitate the
migration of gates clocks to a generic solution.
This also cleans up the USB clocks code slightly, such as adding
newlines, getting rid of the unused clkdev call, using a simple
u32 instead of BITMAP for the clock masks, using BIT() macro to
declare the clock bitmasks, and using of_io_request_and_map() to
get the I/O address.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
enhancements and fixes mostly for ARM32, ARM64, MIPS and Power-based
devices. Additionaly the framework core underwent a bit of surgery with
two major changes. The boundary between the clock core and clock
providers (e.g clock drivers) is now more well defined with dedicated
provider helper functions. struct clk no longer maps 1:1 with the
hardware clock but is a true per-user cookie which helps us tracker
users of hardware clocks and debug bad behavior. The second major change
is the addition of rate constraints for clocks. Rate ranges are now
supported which are analogous to the voltage ranges in the regulator
framework. Unfortunately these changes to the core created some
breakeage. We think we fixed it all up but for this reason there are
lots of last minute commits trying to undo the damage.
-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1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=zCVK
-----END PGP SIGNATURE-----
Merge tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux
Pull clock framework updates from Mike Turquette:
"The clock framework changes contain the usual driver additions,
enhancements and fixes mostly for ARM32, ARM64, MIPS and Power-based
devices.
Additionally the framework core underwent a bit of surgery with two
major changes:
- The boundary between the clock core and clock providers (e.g clock
drivers) is now more well defined with dedicated provider helper
functions. struct clk no longer maps 1:1 with the hardware clock
but is a true per-user cookie which helps us tracker users of
hardware clocks and debug bad behavior.
- The addition of rate constraints for clocks. Rate ranges are now
supported which are analogous to the voltage ranges in the
regulator framework.
Unfortunately these changes to the core created some breakeage. We
think we fixed it all up but for this reason there are lots of last
minute commits trying to undo the damage"
* tag 'clk-for-linus-3.20' of git://git.linaro.org/people/mike.turquette/linux: (113 commits)
clk: Only recalculate the rate if needed
Revert "clk: mxs: Fix invalid 32-bit access to frac registers"
clk: qoriq: Add support for the platform PLL
powerpc/corenet: Enable CLK_QORIQ
clk: Replace explicit clk assignment with __clk_hw_set_clk
clk: Add __clk_hw_set_clk helper function
clk: Don't dereference parent clock if is NULL
MIPS: Alchemy: Remove bogus args from alchemy_clk_fgcs_detr
clkdev: Always allocate a struct clk and call __clk_get() w/ CCF
clk: shmobile: div6: Avoid division by zero in .round_rate()
clk: mxs: Fix invalid 32-bit access to frac registers
clk: omap: compile legacy omap3 clocks conditionally
clkdev: Export clk_register_clkdev
clk: Add rate constraints to clocks
clk: remove clk-private.h
pci: xgene: do not use clk-private.h
arm: omap2+ remove dead clock code
clk: Make clk API return per-user struct clk instances
clk: tegra: Define PLLD_DSI and remove dsia(b)_mux
clk: tegra: Add support for the Tegra132 CAR IP block
...
Adds a way for clock consumers to set maximum and minimum rates. This
can be used for thermal drivers to set minimum rates, or by misc.
drivers to set maximum rates to assure a minimum performance level.
Changes the signature of the determine_rate callback by adding the
parameters min_rate and max_rate.
Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
[sboyd@codeaurora.org: set req_rate in __clk_init]
Signed-off-by: Michael Turquette <mturquette@linaro.org>
[mturquette@linaro.org: min/max rate for sun6i_ahb1_clk_determine_rate
migrated clk-private.h changes to clk.c]
For all pll-s on sun6i n == 0 means use a multiplier of 1, rather then 0 as
it means on sun4i / sun5i / sun7i. n_start = 1 is already correctly set
for sun6i pll6, but was missing for pll1, this commit fixes this.
Cc: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Now that we don't have any user left for our custom phase function, we can
safely remove this hack from the code.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Chen-Yu Tsai <wens@csie.org>
The cpu clock on sunxi machines is just a mux clock, which is normally
fed by the main PLL, but can be muxed to the main or low power oscillator.
Make the mux clock propagate rate changes to its parent, so we can
change the clock rate of the PLL, and thus actually implement rate
changing on the cpu clock.
This patch also removes the no reparenting limit.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
So far the A31s is 100% compatible with the A31, still lets do the same
as what we've done for the A13 / A10s and give it its own compatible string,
in case we need to differentiate later.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
[Maxime: Removed unusude CPU_OF_DECLARE_METHOD]
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Before this commit sunxi_factors_register uses of_iomap(node, 0) to get
the clk registers. The sun6i prcm has factor clocks, for which we want to
use sunxi_factors_register, but of_iomap(node, 0) does not work for the prcm
factor clocks, because the prcm uses the mfd framework, so the registers
are not part of the dt-node, instead they are added to the platform_device,
as platform_device resources.
This commit makes getting the registers the callers duty, so that
sunxi_factors_register can be used with mfd instantiated platform device too.
While at it also add error checking to the of_iomap calls.
This commit also drops the __init function from sunxi_factors_register since
platform driver probe functions are not __init.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This patch unifies the sun6i AHB1 clock, originally supported
with separate mux and divider clks. It also adds support for
the pre-divider on the PLL6 input, thus allowing the clock to
be muxed to PLL6 with proper clock rate calculation.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The ahb1_sdram clock gate is only used for accessing the sdram
controller's registers over the bus. It is not used for actually clock
the controller or the dram, hence it does not need to be protected.
This also gets rid of the problem when the protected ahb1_sdram gate
is prepared/enabled while it is still an orphan, and the operation
is not propagated to the correct parent.
This was confirmed on my A23 tablet and my A31 Hummingbird.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Some clock modules on the A31 use PLL6x2 as one of their inputs.
This patch changes the PLL6 implementation for A31 to a divs clock,
i.e. clock with multiple outputs that have different dividers.
The first output will be the normal PLL6 output, and the second
will be PLL6x2.
This patch fixes the PLL6 N factor in the clock driver, and removes
any /2 dividers in the PLL6 factors clock part. The N factor counts
from 1 to 32, mapping to values 0 to 31, as shown in the A31 manual.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Currently sunxi_divs_clk_setup assumes the number of child clocks
to be the same as the number of clock-output-names, and a maximum
of SUNXI_DIVS_MAX_QTY child clocks.
On sun6i, PLL6 only has 1 child clock, but the parent would be used
as well, thereby also having it's own clock-output-names entry. This
results in an extra bogus clock being registered.
This patch adds an entry for the number of child clocks alongside
the data structures for them.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This driver does not match the hardware, which is actually compatible
to sun4i-a10-apb1-clk. Since we've switch to the correct one, drop
this driver.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
