The PRCM (Power/Reset/Clock Management) unit provides several clock
devices:
- AR100 clk: used to clock the Power Management co-processor
- AHB0 clk: used to clock the AHB0 bus
- APB0 clk and gates: used to clk peripherals connected to the APB0 bus
Add support for these clks in a separate driver so that they can be probed
as platform devices instead of registered during early init.
This is needed to be able to probe PRCM MFD subdevices.
Signed-off-by: Boris BREZILLON <boris.brezillon@free-electrons.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Prevent the SDRAM controller from being gated by force-enabling it in the
machine code.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Right now, AHB is an indirect child clock of the CPU clock. If that
happens to change, since the CPU clock has no other consumers declared
in Linux, it would be shut down, which is not really a good idea.
Prevent this by forcing it enabled.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Since we start to have a lot of clocks to protect, some of them in a
few SoCs only, it becomes difficult to handle the clock protection
without having to add per machine exceptions.
Add per-SoC data to tell which clock to leave enabled.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Since we have a folder of our own, we can actually make use of it by
splitting the huge clock file into several sub drivers.
The gmac clock is pretty easy to deal with, since it's pretty much
isolated and doesn't have any dependency on the other clocks.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Since we have a folder of our own, we can actually make use of it by
splitting the huge clock file into several sub drivers.
The main oscillator is pretty easy to deal with, since it's pretty much
isolated.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Callers of clk_put must disable the clock first. This also means that
as long as the clock is enabled the driver should hold a reference to
that clock. Hence, the call to clk_put here are bogus and should be
removed.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
The A31 USB clock slightly differ from its older counterparts, mostly
because it has a different gate for each PHY, while the older one had
a single gate for all the phy.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
driver additions and fixes. There are additions to the clock core code
for some of the basic types (e.g. the common divider type has some fixes
and featured added to it).
One minor annoyance is a last-minute dependency that wasn't handled
quite right. ba0fae3 in this pull request depends on
include/dt-bindings/clock/berlin2.h, which is already in your tree via
the arm-soc pull request. Building for the berlin platform will break
when the clk tree is built on it's own, but merged into your master
branch everything should be fine.
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Merge tag 'clk-for-linus-3.16' of git://git.linaro.org/people/mike.turquette/linux into next
Pull clock framework updates from Mike Turquette:
"The clock framework changes for 3.16 are pretty typical: mostly clock
driver additions and fixes. There are additions to the clock core
code for some of the basic types (e.g. the common divider type has
some fixes and featured added to it).
One minor annoyance is a last-minute dependency that wasn't handled
quite right. Commit ba0fae3b06 ("clk: berlin: add core clock driver
for BG2/BG2CD") in this pull request depends on
include/dt-bindings/clock/berlin2.h, which is already in your tree via
the arm-soc pull request. Building for the berlin platform will break
when the clk tree is built on it's own, but merged into your master
branch everything should be fine"
* tag 'clk-for-linus-3.16' of git://git.linaro.org/people/mike.turquette/linux: (75 commits)
mmc: sunxi: Add driver for SD/MMC hosts found on Allwinner sunxi SoCs
clk: export __clk_round_rate for providers
clk: versatile: free icst on error return
clk: qcom: Return error pointers for unimplemented clocks
clk: qcom: Support msm8974pro global clock control hardware
clk: qcom: Properly support display clocks on msm8974
clk: qcom: Support display RCG clocks
clk: qcom: Return highest rate when round_rate() exceeds plan
clk: qcom: Fix mmcc-8974's PLL configurations
clk: qcom: Fix clk_rcg2_is_enabled() check
clk: berlin: add core clock driver for BG2Q
clk: berlin: add core clock driver for BG2/BG2CD
clk: berlin: add driver for BG2x complex divider cells
clk: berlin: add driver for BG2x simple PLLs
clk: berlin: add driver for BG2x audio/video PLL
clk: st: Terminate of match table
clk/exynos4: Fix compilation warning
ARM: shmobile: r8a7779: Add clock index macros for DT sources
clk: divider: Fix overflow in clk_divider_bestdiv
clk: u300: Terminate of match table
...
Adding function type checking to CLK_OF_DECLARE found a type mismatch with
sunxi_init_clocks. The function takes a single struct device_node
parameter.
Signed-off-by: Rob Herring <robh@kernel.org>
Acked-by: Mike Turquette <mturquette@linaro.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Use for_each_matching_node_and_match instead of for_each_matching_node plus
of_match_node to avoid searching the DT twice for each node.
The sunxi DT scanning code should really be re-worked rather than have
its own private matching infrastructure. It is working around needing a
function pointer and a data pointer for each compatible match.
Signed-off-by: Rob Herring <robh@kernel.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Acked-by: Mike Turquette <mturquette@linaro.org>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
__clk_get_hw is supposed to be used by clk providers, not clk consumers.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Reviewed-by: Ulf Hansson <ulf.hansson@linaro.org>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This commit implements .determine_rate, so that our factor clocks can be
reparented when needed.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This should read MOD0 and not MMC; MMC is just one example of a MOD0
clock.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Some divisor calculations were misrounded, causing higher than requested
rates on some clocks. Fix them up using DIV_ROUND_UP, and replace one
homebrew instance of it as well with the right macro.
Reported-by: Boris BREZILLON <b.brezillon.dev@gmail.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Allwinner actually reworked the PLL4 on A20; now it's compatible with
the sun4i PLL5/6 design previous to any divisions, as well as to the new
PLL8 in sun7i.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
The Allwinner A10 compatibles were following a slightly different compatible
patterns than the rest of the SoCs for historical reasons. Add compatibles
matching the other pattern to the clock driver for consistency, and keep the
older one for backward compatibility.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
The Allwinner A20/A31 clock module controls the transmit clock source
and interface type of the GMAC ethernet controller. Model this as
a single clock for GMAC drivers to use.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
The A31 has a slightly different PLL6 clock. Add support for this new clock in
our driver.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Add register definitions for the usb-clk register found on sun4i, sun5i and
sun7i SoCs.
Signed-off-by: Roman Byshko <rbyshko@gmail.com>
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
The usb-clk register is special in that it not only contains clk gate bits,
but also has a few reset bits. This commit adds support for this by allowing
gates type sunxi clks to also register a reset controller.
Signed-off-by: Hans de Goede <hdegoede@redhat.com>
Acked-by: Philipp Zabel <p.zabel@pengutronix.de>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Divs clocks consist of a parent factor clock with multiple outputs,
and seperate clocks for each output. Get the name of the parent
clock from the parent factor clock, instead of the DT node name.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Some factor clocks, such as the parent clock of pll5 and pll6, have
multiple output names. Add the corresponding names to factors_data
tied to compatible string.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
sunxi clock drivers use dt node name as clock name, but clock
nodes should be named clk@X, so the names would be the same.
Let the drivers read clock names from dt clock-output-names
property.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Currently, we are allocating space for two pointers, when we actually
may need to store three of them (two divisors plus the original clock).
Fix this, and change sizeof(type) to sizeof(*var) to keep checkpatch.pl
happy.
Reported-by: Dan Carpenter <dan.carpenter@oracle.com>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
This patch adds support for the external clock outputs on the
Allwinner A20 SoC. The clock outputs are similar to "module 0"
type clocks, with different offsets and widths for clock factors.
Signed-off-by: Chen-Yu Tsai <wens@csie.org>
Acked-by: Emilio López <emilio@elopez.com.ar>
The DT nodes should look like
abc_clk: clk@deadbeef {
...
clock-output-names = "abc";
}
But our old DT nodes look like
abc: abc@deadbeef {
...
}
So, let's support both formats, until we can transition everything
to the new, correct one.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Mike Turquette <mturquette@linaro.org>
This commit implements support for the "module 0" type of clocks, as
used by MMC, IR, NAND, SATA and other components.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Mike Turquette <mturquette@linaro.org>
This commit implements PLL5 and PLL6 support on the sunxi clock driver.
These PLLs use a similar factor clock, but differ on their outputs.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Mike Turquette <mturquette@linaro.org>
We will be needing this to register a factor clock as parent with leaf
divisors on a single call.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Mike Turquette <mturquette@linaro.org>
This commit adds gating support to PLL1 on the clock driver. This makes
the PLL1 implementation fully compatible with PLL4 as well.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
This was pointed out during the review of the factor patches. Let's
indicate what does that magic 5 mean.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Mike Turquette <mturquette@linaro.org>
This commit reworks factors clock registration to be done behind a
composite clock. This allows us to additionally add a gate, mux or
divisors, as it will be needed by some future PLLs.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
Those are mostly random fixes, except for one patch to the composite
clock that adds support for automatic reparenting.
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Merge tag 'sunxi-clk-for-3.13' of https://github.com/mripard/linux into clk-next-sunxi-rebase
Allwinner sunXi SoCs clock changes
Those are mostly random fixes, except for one patch to the composite
clock that adds support for automatic reparenting.
Conflicts:
drivers/clk/sunxi/clk-sunxi.c
Fix a possible memory leak in sun4i_osc_clk_setup().
Moved clock-frequency check to save superfluous allocation.
Signed-off-by: Victor N. Ramos Mello <victornrm@gmail.com>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Some important clocks may get disabled as a side effect of another clock
being disabled, because they have no consumers. This patch implements a
mechanism so those clocks can be claimed by the driver and therefore
remain enabled at all times.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Random bits may get into our factors if we don't clear n, k, m and p.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
The previous code would generate one bit too long masks, and was
needlessly complicated. This patch replaces it by simpler code that can
generate the masks correctly.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Common clock framework allows to register clock providers to get called
on of_clk_init() by using CLK_OF_DECLARE. This converts sunxi clock
providers to make use of it and get rid of the mach specific clk init
call. As sunxi has a bunch of independent clk provider nodes, we hook
current clock init to board compatible to make it called once.
Signed-off-by: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Acked-by: Mike Turquette <mturquette@linaro.org>
__initconst should be placed between the variable name and equal
sign for the variable to be placed in the intended section.
Signed-off-by: Sachin Kamat <sachin.kamat@linaro.org>
Cc: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
[mturquette@linaro.org: refreshed patch based on sunxi changes]
The Allwinner A20 is almost identical to the earlier A10 SoC from
Allwinner on many aspects, including the clocks tree. However, since the
A20 has some additionnal IPs compared to the A10, the clock tree isn't
exactly the same, especially when it comes to the gated clocks
available. We thus need to register different clock gates for the A20.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Emilio López <emilio@elopez.com.ar>
The A31 has a mostly different clock set compared to the other older
SoCs currently supported in the Allwinner clock driver.
Add support for the basic useful clocks. The other ones will come in
eventually.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Emilio López <emilio@elopez.com.ar>
The divider width used to be hardcoded. Some A31 dividers are no longer
with the hardcoded width, so we need to make it specific to each divider
and set it in the dividers data.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Emilio López <emilio@elopez.com.ar>
Rename all the generic-named structure to sun4i to avoid confusion when
we will introduce the sun6i (A31) clocks.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reviewed-by: Emilio López <emilio@elopez.com.ar>
With the recent move towards CLK_OF_DECLARE(...), the driver stopped
initializing osc32k, which is compatible "fixed-clock". This is because
we never called of_clk_init(NULL). Fix this by moving the only other
simple clock (osc24M) to use CLK_OF_DECLARE(...) and call of_clk_init(NULL)
to initialize both of them.
Signed-off-by: Emilio López <emilio@elopez.com.ar>
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Mike Turquette <mturquette@linaro.org>
The Allwinner A10s has a slightly different gates set than the A10 and
A13, so add these gates to the clk driver.
Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Tested-by: Emilio López <emilio@elopez.com.ar>
Reviewed-by: Emilio López <emilio@elopez.com.ar>
Add a CLK_SET_RATE_NO_REPARENT clock flag, which will prevent muxes
being reparented during clk_set_rate.
To avoid breaking existing platforms, all callers of clk_register_mux()
are adjusted to pass the new flag. Platform maintainers are encouraged
to remove the flag if they wish to allow mux reparenting on set_rate.
Signed-off-by: James Hogan <james.hogan@imgtec.com>
Reviewed-by: Stephen Boyd <sboyd@codeaurora.org>
Cc: Mike Turquette <mturquette@linaro.org>
Cc: Russell King <linux@arm.linux.org.uk>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Stephen Warren <swarren@wwwdotorg.org>
Cc: Viresh Kumar <viresh.linux@gmail.com>
Cc: Kukjin Kim <kgene.kim@samsung.com>
Cc: Haojian Zhuang <haojian.zhuang@linaro.org>
Cc: Chao Xie <xiechao.mail@gmail.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Gregory CLEMENT <gregory.clement@free-electrons.com>
Cc: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: Prashant Gaikwad <pgaikwad@nvidia.com>
Cc: Thierry Reding <thierry.reding@gmail.com>
Cc: Peter De Schrijver <pdeschrijver@nvidia.com>
Cc: Pawel Moll <pawel.moll@arm.com>
Cc: Catalin Marinas <catalin.marinas@arm.com>
Cc: Andrew Chew <achew@nvidia.com>
Cc: Doug Anderson <dianders@chromium.org>
Cc: Heiko Stuebner <heiko@sntech.de>
Cc: Paul Walmsley <pwalmsley@nvidia.com>
Cc: Sylwester Nawrocki <s.nawrocki@samsung.com>
Cc: Thomas Abraham <thomas.abraham@linaro.org>
Cc: Tomasz Figa <t.figa@samsung.com>
Cc: linux-arm-kernel@lists.infradead.org
Cc: linux-samsung-soc@vger.kernel.org
Cc: spear-devel@list.st.com
Cc: linux-tegra@vger.kernel.org
Tested-by: Haojian Zhuang <haojian.zhuang@gmail.com>
Acked-by: Stephen Warren <swarren@nvidia.com> [tegra]
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com> [sunxi]
Acked-by: Sören Brinkmann <soren.brinkmann@xilinx.com> [Zynq]
Signed-off-by: Mike Turquette <mturquette@linaro.org>
clk_register_composite() and clk_register_factors() return ERR_PTR on error.
Signed-off-by: Axel Lin <axel.lin@ingics.com>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Mike Turquette <mturquette@linaro.org>
In some architectures, the #define cpu_data is not a "macro-function",
so the compiler will substitute the identifier with probably something
wrong.
Signed-off-by: Giacomo A. Catenazzi <cate@cateee.net>
Signed-off-by: Emilio López <emilio@elopez.com.ar>
[emilio@elopez.com.ar: use cpu_mux_data instead of this_cpu_data]
Signed-off-by: Mike Turquette <mturquette@linaro.org>
Boris BREZILLON