Using an array allocated on the stack may lead to stack overflows
and other problems so let's move the allocation to the heap
instead. This silences the following checker warning as well.
drivers/clk/sunxi/clk-sun8i-mbus.c:36:29: warning: Variable length array is used
Cc: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This patch adds support for APB0 in H3. It seems to be compatible with
earlier SOCs. apb0 gates controls R_ block peripherals (R_PIO, R_IR,
etc).
Since this gates behave just like any Allwinner clock gate, add a generic
compatible that can be reused if we don't have any clock to protect.
Signed-off-by: Krzysztof Adamski <k@japko.eu>
[Maxime: Removed the H3 compatible from the simple-gates driver, reworked
the commit log a bit]
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>
The APB0 clock on A23 is a zero-based divider, not a power-of-two based
divider.
Note that this patch does not apply cleanly to kernels before 4.5-rc1,
which added CLK_OF_DECLARE support to this driver.
Fixes: 57a1fbf284 ("clk: sunxi: Add A23 APB0 divider clock support")
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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 clk-sun6i-ar100 clk driver is a platform driver that may use
deferred probing, so its probe function must not access
__init symbols. Kbuild warns about this:
WARNING: drivers/clk/sunxi/built-in.o(.text+0x15f0): Section mismatch in reference from the function sun6i_a31_ar100_clk_probe() to the (unknown reference) .init.rodata:(unknown)
The function sun6i_a31_ar100_clk_probe() references
the (unknown reference) __initconst (unknown).
This is often because sun6i_a31_ar100_clk_probe lacks a __initconst
annotation or the annotation of (unknown) is wrong.
Removing the __initconst annotation avoids the warning and makes
deferred probing work.
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Fixes: 3ca2377b6f ("clk: sunxi: rewrite sun6i-ar100 using factors clk")
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
A83T has similar bus gates that of H3, including single gating register has
different clock parent.
As per H3 and A83T datasheet, usbhost is under AHB2.
However,below shows allwinner source code assignment:
bits: 26 (ehci0), 27 (ehci1), 29 (ohci0) => AHB1 for A83T.
bits: 26 (ehci0), 27 (ehci1) => AHB1 for H3
bits 29, 30, 31(ohci0,1,2) => AHB2 for H3.
until, this confusion is cleared keep it H3 way.
Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
APB0 is part of PRCM, and is compatible with earlier SOCs.
apb0 gates controls R_PIO, R_UART, R_RSB, etc clocks.
This patch adds support for APB0 gates for A83T.
Signed-off-by: Vishnu Patekar <vishnupatekar0510@gmail.com>
Acked-by: Rob Herring <robh@kernel.org>
Acked-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
sun8i-a23-mbus-clk used sunxi's factors clk, which is nice for very
complicated clocks, but is not really needed here.
Convert sun8i-a23-mbus-clk to use clk_composite, as it is a gate + mux
+ divider. This makes the code easier to understand.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
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 common clock framework requires either determine_rate or round_rate
to be implemented. We use determine_rate so we can pass the parent index
to the get_factors callback. This cannot be done easily with round_rate,
so just drop it.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Some clocks cannot be modelled using the standard factors clk formula,
such as clocks with special pre-dividers on one parent, or clocks
with all power-of-two dividers.
Add support for a custom .recalc callback for factors clk. Also pass
the current parent index to the .get_factor and .recalc callbacks.
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>
sunxi's factors clk did not have an unregister function. This means
multiple structs were leaked whenever a factors clk was unregistered.
Add an unregister function for it. Also keep pointers to the mux and
gate structs so they can be freed.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
sunxi_factors_register() does not check for failures or cleanup after
clk_register_composite() or other clk-related calls.
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 latest addition of H3 USB clocks placed them at the bottom. Move it
before A80 (sun9i), so they are sorted by SoC family then name.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This file is a clock provider, not a clk consumer. Drop the clk.h
include.
Cc: Jens Kuske <jenskuske@gmail.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Clock patches for the Allwinner SoCs:
- H3 clocks
- A10/A20 Video Engine clocks
- DRAM gates
- A80 special CPU clock
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Merge tag 'sunxi-clocks-for-4.5' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into clk-next
Allwinner clocks changes for 4.5
Clock patches for the Allwinner SoCs:
- H3 clocks
- A10/A20 Video Engine clocks
- DRAM gates
- A80 special CPU clock
The function can return negative values, so its result should
be assigned to signed variable.
The problem has been detected using proposed semantic patch
scripts/coccinelle/tests/assign_signed_to_unsigned.cocci [1].
[1]: http://permalink.gmane.org/gmane.linux.kernel/2046107
Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
"index" needs to be signed for the error handling to work.
Fixes: ab6e23a4e3 ('clk: sunxi: Add H3 clocks support')
Signed-off-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The APBS clock on sun9i is the same as the APB0 clock on sun8i. With
sun9i we are supporting the PRCM clocks by using CLK_OF_DECLARE,
instead of through a PRCM mfd device and subdevices for each clock
and reset control. As such we need a CLK_OF_DECLARE version of
the sun8i-a23-apb0-clk driver.
Also, build it for sun9i/A80, and not just for configurations with
MFD_SUN6I_PRCM enabled.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The video engine has its own special module clock, consisting of a clock
gate, configurable dividers, and a reset control.
On later (sun[68]i) families, the reset control is moved out of this
piece of hardware and grouped with reset controls of other peripherals.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Tested-by: Jens Kuske <jenskuske@gmail.com>
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 A10/A20 share the same set of DRAM clock gates, which controls
direct memory access for some peripherals.
On the A10, bit 15 controls the system's DRAM clock output (possibly
to the DRAM chips), which we need to keep on.
On the A20 this has been moved to the DRAM controller, becoming a no-op.
However it is still listed in the user manual, so add it anyway.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Contrary to what the datasheet says, the pre divider doesn't seem to be
incremented by one in the PLL2, but just uses the value from the register,
with 0 being a bypass.
This fixes the audio playing too fast.
Since we now have the same pre-divider flags, and the only difference with
the A10 is the post-divider offset, also remove the structure to just pass
the offset as an argument.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Fixes: eb662f8547 ("clk: sunxi: pll2: Add A13 support")
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The "cpus" clock is the clock for the embedded processor in the A80.
It is also part of the PRCM clock tree. This clock includes a pre-
divider on one of its inputs. For now we are using a custom clock
driver for it. In the future we may want to develop a generalized
driver for these types of clocks, which also includes the AHB clock
driver on sun[5678]i.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This patch adds support for the PRCM apbs clock gates found on the
Allwinner A80 SoC.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The H3 has a usb-phy clk register which is similar to that of earlier
SoCs, but with support for a larger number of phys. So we can simply add
a new set of clk-data and a new compatible and be done with it.
Acked-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Reinder de Haan <patchesrdh@mveas.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
New and/or improved SoC support for this release:
- Marvell Berlin:
* Enable standard DT-based cpufreq
* Add CPU hotplug support
- Freescale:
* Ethernet init for i.MX7D
* Suspend/resume support for i.MX6UL
- Allwinner:
* Support for R8 chipset (used on NTC's $9 C.H.I.P board)
- Mediatek:
* SMP support for some platforms
- Uniphier:
* L2 support
* Cleaned up SMP support, etc.
+ A handful of other patches around above functionality, and a few other
smaller changes.
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Merge tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc
Pull ARM SoC platform updates from Olof Johansson:
"New and/or improved SoC support for this release:
Marvell Berlin:
- Enable standard DT-based cpufreq
- Add CPU hotplug support
Freescale:
- Ethernet init for i.MX7D
- Suspend/resume support for i.MX6UL
Allwinner:
- Support for R8 chipset (used on NTC's $9 C.H.I.P board)
Mediatek:
- SMP support for some platforms
Uniphier:
- L2 support
- Cleaned up SMP support, etc.
plus a handful of other patches around above functionality, and a few
other smaller changes"
* tag 'armsoc-soc' of git://git.kernel.org/pub/scm/linux/kernel/git/arm/arm-soc: (42 commits)
ARM: uniphier: rework SMP operations to use trampoline code
ARM: uniphier: add outer cache support
Documentation: EXYNOS: Update bootloader interface on exynos542x
ARM: mvebu: add broken-idle option
ARM: orion5x: use mac_pton() helper
ARM: at91: pm: at91_pm_suspend_in_sram() must be 8-byte aligned
ARM: sunxi: Add R8 support
ARM: digicolor: select pinctrl/gpio driver
arm: berlin: add CPU hotplug support
arm: berlin: use non-self-cleared reset register to reset cpu
ARM: mediatek: add smp bringup code
ARM: mediatek: enable gpt6 on boot up to make arch timer working
soc: mediatek: Fix random hang up issue while kernel init
soc: ti: qmss: make acc queue support optional in the driver
soc: ti: add firmware file name as part of the driver
Documentation: dt: soc: Add description for knav qmss driver
ARM: S3C64XX: Use PWM lookup table for mach-smartq
ARM: S3C64XX: Use PWM lookup table for mach-hmt
ARM: S3C64XX: Use PWM lookup table for mach-crag6410
ARM: S3C64XX: Use PWM lookup table for smdk6410
...
- Support for the Audio PLL and child clocks
- Support for the A33 AHB gates
- New clk-multiplier generic driver
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Merge tag 'sunxi-clocks-for-4.4' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into clk-next
Pull Allwinner clock additions for 4.4 from Maxime Ripard:
- Support for the Audio PLL and child clocks
- Support for the A33 AHB gates
- New clk-multiplier generic driver
* tag 'sunxi-clocks-for-4.4' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux:
clk: sunxi: mod1 clock support
clk: sunxi: codec clock support
clk: sunxi: pll2: Add A13 support
clk: sunxi: Add a driver for the PLL2
clk: Add a basic multiplier clock
clk: sunxi: Add A33 gates support
The module 1 type of clocks consist of a gate and a mux and are used on
the audio blocks to mux and gate the PLL2 outputs for AC97, IIS or
SPDIF. This commit adds support for them on the sunxi clock driver.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
The codec clock on sun4i, sun5i and sun7i is a simple gate with PLL2 as
parent. Add a driver for such a clock.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
The A13, unlike the A10 and A20, doesn't use a pass-through exception for
the 0 value in the pre and post dividers, but increments all the values
written in the register by one.
Add an exception for both these cases to handle them nicely.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
The PLL2 on the A10 and later SoCs is the clock used for all the audio
related operations.
This clock has a somewhat complex output tree, with three outputs (2X, 4X
and 8X) with a fixed divider from the base clock, and an output (1X) with a
post divider.
However, we can simplify things since the 1X divider can be fixed, and we
end up by having a base clock not exposed to any device (or at least
directly, since the 4X output doesn't have any divider), and 4 fixed
divider clocks that will be exposed.
This clock seems to have been introduced, at least in this form, in the
revision B of the A10, but we don't have any information on the clock used
on the revision A.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Chen-Yu Tsai <wens@csie.org>
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>
The A33 gates are different from the A23 ones, add a new hook to simple
gates to handle this clock
Reported-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This platform driver has a OF device ID table but the OF module
alias information is not created so module autoloading won't work.
Signed-off-by: Luis de Bethencourt <luis@debethencourt.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Stephen Boyd