Commit Graph

3217 Commits

Author SHA1 Message Date
Michael Turquette
d22527fed2 Merge branch 'clk-fixes' into clk-next 2016-07-21 17:30:54 -07:00
Michael Turquette
b328d2c110 clk: Makefile: re-sort and clean up
Sorting is hard.

Signed-off-by: Michael Turquette <mturquette@baylibre.com>
2016-07-19 09:53:52 -07:00
Boris Brezillon
f96423f483 clk: at91: fix clk_programmable_set_parent()
Since commit 1bdf02326b ("clk: at91: make use of syscon/regmap
internally"), clk_programmable_set_parent() is always selecting the
first parent (AKA slow_clk), no matter what's passed in the 'index'
parameter.

Fix that by initializing the pckr variable to the index value.

Signed-off-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Reported-by: Hans Verkuil <hans.verkuil@cisco.com>
Fixes: 1bdf02326b ("clk: at91: make use of syscon/regmap internally")
Cc: <stable@vger.kernel.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1468828152-18389-1-git-send-email-boris.brezillon@free-electrons.com
2016-07-18 17:45:41 -07:00
Michael Turquette
149f9e734f Merge branch 'clk-s905' into clk-next 2016-07-15 19:15:40 -07:00
Michael Turquette
ca1d2e269f Revert "clk: gxbb: expose CLKID_MMC_PCLK"
This reverts commit e16fb2e635.

Updated documentation from the chip vendor reveals that this clock is
not required for correct operation of the MMC controller. As such, do
not expose it to DT.

Signed-off-by: Michael Turquette <mturquette@baylibre.com>
2016-07-15 19:15:12 -07:00
Sylwester Nawrocki
4d252fd571 clk: samsung: Allow modular build of the Audio Subsystem CLKCON driver
Any clock dependencies can be properly handled with deferred probing
so we can remove core_initcall and switch to a proper loadable platform
driver module.
This change has been tested on Exynos4412 Odroid U3 based board.

Signed-off-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1467987300-31450-1-git-send-email-s.nawrocki@samsung.com
2016-07-13 14:59:53 -07:00
Paul Gortmaker
4c7c28ffe9 clk: samsung: make clk-s5pv210-audss explicitly non-modular
The Kconfig currently controlling compilation of this code is:

arch/arm/mach-s5pv210/Kconfig:config ARCH_S5PV210
arch/arm/mach-s5pv210/Kconfig:  bool "Samsung S5PV210/S5PC110" if ARCH_MULTI_V7

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

We explicitly disallow a driver unbind, since that doesn't have a
sensible use case anyway, and it allows us to drop the ".remove"
code for non-modular drivers.

Since this code is already not using module_init, case, the init
ordering remains unchanged with this commit.

We also delete the MODULE_LICENSE tags etc. since all that information
is already contained at the top of the file in the comments.

Cc: Tomasz Figa <tomasz.figa@gmail.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: linux-samsung-soc@vger.kernel.org
Cc: linux-clk@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160704211220.5685-8-paul.gortmaker@windriver.com
2016-07-13 14:57:59 -07:00
Andi Shyti
9893c9bf6a clk: exynos5433: remove CLK_IGNORE_UNUSED flag from SPI clocks
Because the Exynos5433 SPI driver supports the ioclk handling and
the following patch:

  http://marc.info/?l=linux-kernel&m=146787645626318&w=2

fixes a synchronus abort issue, none of the SPI clocks require
any critical handling: remove, then, the CLK_IGNORE_UNUSED flag
for the SPI related clocks.

Signed-off-by: Andi Shyti <andi.shyti@samsung.com>
Reviewed-by: Krzysztof Kozlowski <k.kozlowski@samsung.com>
Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1468317736-18841-8-git-send-email-andi.shyti@samsung.com
2016-07-13 14:55:56 -07:00
Jean Delvare
821f9946e0 clk: oxnas: Add hardware dependencies
The clk-oxnas driver is specific to its architecture, so do not
propose it on other architectures, unless build-testing.

Signed-off-by: Jean Delvare <jdelvare@suse.de>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160707091844.196a7930@endymion
2016-07-12 15:31:21 -07:00
Stefan Agner
5e33ebff7e clk: imx7d: do not set parent of ethernet time/ref clocks
All device trees currently in mainline specify the time clock parent
using the assigned-clocks/assigned-clock-parents method, there is no
need to statically assign the parent in the core clock driver.
Also all current boards provide an Ethernet reference clock for the
PHY externally, hence configuring the internal PHY reference clock.

Furthermore, and the actual driver of this patch, specify ethernet
related parents at that early point in boot leads to a warning:
bad: scheduling from the idle thread!

The reason for the warning is that setting the parent enables the ENET
PLL since we are using CLK_OPS_PARENT_ENABLE. Enabling the ENET PLL can
cause clk_pllv3_wait_lock to sleep. See also:
commit fc8726a2c0 ("clk: core: support clocks which requires parents
enable (part 2)").

Note that setting the ENET AXI root clock parent also requires ENET
PLL to be enabled. However, U-Boot typically leaves the ENET PLL on,
hence when the framework sets the parent of the first clock, it does
not need to wait for the PLL to come up. But because there is currently
no user of that clock, the PLL gets disabled after setting the parent.
Therefore, subsequent reparenting calls of any clock which somehow rely
on the ENET PLL, need to reenable the ENET PLL which leads to a sleep.
Removing those subsequent reparenting calls works around this issue.

Also remove comments. The code is really verbose enough.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Tested-by: Fabio Estevam <festevam@gmail.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160703174813.13970-1-stefan@agner.ch
2016-07-12 15:31:14 -07:00
Michael Turquette
3c67d1162a Merge branch 'clk-sunxi-ng' into clk-next 2016-07-11 14:39:47 -07:00
Maxime Ripard
5dc3916386 clk: sunxi-ng: h3: Fix Kconfig symbol typo
The Kconfig symbol for the sun8i SoC family was mistyped. Fix that.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160711203448.18062-2-maxime.ripard@free-electrons.com
2016-07-11 14:35:16 -07:00
Maxime Ripard
0bd8fa2608 clk: sunxi-ng: h3: Fix audio clock divider offset
The code had a typo and got the wrong offset for the hardcoded divider, fix
that.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Reported-by: Jean-Francois Moine <moinejf@free.fr>
Reported-by: Chen-Yu Tsai <wens@csie.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160711203448.18062-1-maxime.ripard@free-electrons.com
2016-07-11 14:34:54 -07:00
Michael Turquette
7adb769561 Merge branch 'clk-sunxi-ng' into clk-next 2016-07-08 18:08:56 -07:00
Maxime Ripard
0577e4853b clk: sunxi-ng: Add H3 clocks
Add the list of clocks and resets found in the H3 CCU.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-14-maxime.ripard@free-electrons.com
2016-07-08 18:05:12 -07:00
Maxime Ripard
4f728b5db7 clk: sunxi-ng: Add N-K-M-P factor clock
Introduce support for clocks that use a combination of two linear
multipliers (N and K factors), one linear divider (M) and one power of two
divider (P).

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-13-maxime.ripard@free-electrons.com
2016-07-08 18:05:06 -07:00
Maxime Ripard
df6561e602 clk: sunxi-ng: Add N-K-M Factor clock
Introduce support for clocks that multiply and divide using two linear
multipliers and one linear divider.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-12-maxime.ripard@free-electrons.com
2016-07-08 18:05:03 -07:00
Maxime Ripard
6174a1e24b clk: sunxi-ng: Add N-M-factor clock support
Introduce support for clocks that multiply and divide using linear factors.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-11-maxime.ripard@free-electrons.com
2016-07-08 18:05:00 -07:00
Maxime Ripard
adbfb0056e clk: sunxi-ng: Add N-K-factor clock support
Introduce support for clocks that use a combination of two linear
multipliers.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-10-maxime.ripard@free-electrons.com
2016-07-08 18:04:56 -07:00
Maxime Ripard
2ab836db50 clk: sunxi-ng: Add M-P factor clock support
Introduce support for the clocks that combine a linear divider and a
power-of-two based one.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-9-maxime.ripard@free-electrons.com
2016-07-08 18:04:52 -07:00
Maxime Ripard
e9b9321310 clk: sunxi-ng: Add divider
Add support for the various dividers (linear, table or pow-of-two based)
found in the CCU.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-8-maxime.ripard@free-electrons.com
2016-07-08 18:04:48 -07:00
Maxime Ripard
6f9f7f876e clk: sunxi-ng: Add phase clock support
Add support for the clocks in the CCU that introduce a phase shift from
their parent clock.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-7-maxime.ripard@free-electrons.com
2016-07-08 18:04:45 -07:00
Maxime Ripard
2a65ed42dc clk: sunxi-ng: Add mux clock support
Some clocks in the Allwinner SoCs clocks unit are just muxes.

However, those muxes might also be found in some other complicated clocks
that would benefit from the code in there to deal with "advanced" features,
like pre-dividers.

Introduce a set of helpers to reduce the code duplication in such cases.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-6-maxime.ripard@free-electrons.com
2016-07-08 18:04:42 -07:00
Maxime Ripard
1a7e7c388d clk: sunxi-ng: Add gate clock support
Some clocks in the Allwinner SoCs clocks unit are just simple gates. Add
support for those clocks.

Since it's a feature that can also be found in more complex clocks, provide
a bunch of helpers that can be reused later on.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-5-maxime.ripard@free-electrons.com
2016-07-08 18:04:38 -07:00
Maxime Ripard
89a3dfb787 clk: sunxi-ng: Add fractional lib
Some clocks can be switched to a mode called fractional that have two fixed
output rate you can choose from.

Add a small library to deal with those clocks.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-4-maxime.ripard@free-electrons.com
2016-07-08 18:04:35 -07:00
Maxime Ripard
1d80c14248 clk: sunxi-ng: Add common infrastructure
Start our new clock infrastructure by adding the registration code, common
structure and common code.

Signed-off-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160629190535.11855-3-maxime.ripard@free-electrons.com
2016-07-08 18:04:32 -07:00
Stefan Agner
a06498297d clk: imx: vf610: Disable automatic clock gating for lpuart in LPSTOP mode
In order to allow wake support in STOP sleep mode, clocks are needed. Use
imx_clk_gate2_cgr to disable automatic clock gating in low power mode STOP.
This allows to enable wake by UART using:
echo enabled > /sys/class/tty/ttyLP0/power/wakeup

However, if wake is not enabled, the driver should disable the clocks explicitly
to save power.

Signed-off-by: Stefan Agner <stefan@agner.ch>
Signed-off-by: Bhuvanchandra DV <bhuvanchandra.dv@toradex.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160628053235.5114-3-bhuvanchandra.dv@toradex.com
2016-07-08 11:38:17 -07:00
Tomeu Vizoso
c200c39b2d clk: clk-conf: Fix error message when clock isn't found
When failing to lookup the assigned clock for setting its parents, we
were previously printing a misleading error message that lead to think
that it was the parent clock what couldn't be found.

Change error message to make clear that it's the assigned clock what
couldn't be found in this case.

Signed-off-by: Tomeu Vizoso <tomeu.vizoso@collabora.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1467962078-30405-1-git-send-email-tomeu.vizoso@collabora.com
2016-07-08 11:27:58 -07:00
Michael Turquette
a0fc8c4f4c Merge branch 'clk-s905' into clk-next 2016-07-07 20:06:30 -07:00
Kevin Hilman
e16fb2e635 clk: gxbb: expose CLKID_MMC_PCLK
The MMC_PCLK is needed for the SD/eMMC driver, expose to DT (and comment
out in clk driver)

Signed-off-by: Kevin Hilman <khilman@baylibre.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160707033837.20029-1-khilman@baylibre.com
2016-07-07 20:05:59 -07:00
Christophe JAILLET
334e125b4e clk: stm32f4: fix error handling
This is likely that checking 'clks[idx]' instead of 'clks[n]' is
expected here.

Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1467526003-13318-1-git-send-email-christophe.jaillet@wanadoo.fr
2016-07-06 17:55:31 -07:00
Michael Turquette
b24faef9a3 Merge branch 'clk-lpc32xx' into clk-next 2016-07-06 17:51:42 -07:00
Sylvain Lemieux
054e273008 clk: lpc32xx: allow peripheral clock selection in device tree
This patch add the support to select the peripheral clock (PERIPH)
as a parent clock source using the "assigned-clock-parents"
parameter in the device tree.

Signed-off-by: Sylvain Lemieux <slemieux@tycoint.com>
Acked-by: Vladimir Zapolskiy <vz@mleia.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1464982475-24738-1-git-send-email-slemieux.tyco@gmail.com
2016-07-06 17:51:14 -07:00
Paul Gortmaker
439a36d7d9 clk: sunxi: make clk-* explicitly non-modular
We have the following file --> Kconfig mapping:

sunxi/clk-factors.c              obj-y
sunxi/clk-sun6i-apb0-gates.c     CONFIG_MFD_SUN6I_PRCM (bool)
sunxi/clk-sun6i-apb0.c           CONFIG_MFD_SUN6I_PRCM
sunxi/clk-sun6i-ar100.c          CONFIG_MFD_SUN6I_PRCM
sunxi/clk-sun8i-apb0.c           CONFIG_MFD_SUN6I_PRCM
sunxi/clk-sun9i-mmc.c            obj-y

Hence none of these are being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the drivers there is no doubt they are builtin-only.  All
drivers get mostly the same changes, so they are handled in batch.

Changes are (1) convert to builtin_platform_register, (2) use the
init.h header, (3) delete the MODULE_LICENCE/MODULE_AUTHOR and
associated tags, and (4) delete any ".remove" functions.

There was a stray module.h in a file not using any init.h or
module.h stuff, so we simply removed that one.

In two cases, we explicitly disallow a driver unbind, since that
doesn't have a sensible use case anyway, and it allows us to drop
the ".remove" code for non-modular drivers.

Since module_platform_driver() uses the same init level priority as
builtin_platform_driver() the init ordering remains unchanged with
this commit.

We delete the MODULE_LICENSE etc. tags since all that information
is already contained at the top of each file in the comments.

Acked-by: Boris Brezillon <boris.brezillon@free-electrons.com>
Cc: Chen-Yu Tsai <wens@csie.org>
Cc: "Emilio López" <emilio@elopez.com.ar>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Maxime Ripard <maxime.ripard@free-electrons.com>
Cc: linux-clk@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160704211220.5685-9-paul.gortmaker@windriver.com
2016-07-06 15:20:34 -07:00
Paul Gortmaker
80c6397c37 clk: oxnas: make it explicitly non-modular
The Kconfig currently controlling compilation of this code is:

drivers/clk/Kconfig:config COMMON_CLK_OXNAS
drivers/clk/Kconfig:    bool "Clock driver for the OXNAS SoC Family"

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

We explicitly disallow a driver unbind, since that doesn't have a
sensible use case anyway, and it allows us to drop the ".remove"
code for non-modular drivers.

Since module_platform_driver() uses the same init level priority as
builtin_platform_driver() the init ordering remains unchanged with
this commit.

Also note that MODULE_DEVICE_TABLE is a no-op for non-modular code.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Acked-by: Neil Armstrong <narmstrong@baylibre.com>
Cc: linux-clk@vger.kernel.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160704211220.5685-6-paul.gortmaker@windriver.com
2016-07-06 15:20:33 -07:00
Wadim Egorov
cb98fd5d4d clk: Kconfig: Name RK818 in Kconfig for COMMON_CLK_RK808
The RK808 and RK818 PMICs are using a similar register map.
We can reuse the clk driver for the RK818 PMIC. So let's add
the RK818 in the Kconfig description.

Signed-off-by: Wadim Egorov <w.egorov@phytec.de>
Acked-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1464850228-17244-4-git-send-email-w.egorov@phytec.de
2016-07-06 15:20:32 -07:00
Xinliang Liu
c6e80ace83 clk: hi6220: Change syspll and media_syspll clk to 1.19GHz
In the bootloader of HiKey/96boards, syspll and media_syspll clk
was initialized to 1.19GHz. So, here changes it in kernel accordingly.

1.19GHz was chosen over 1.2GHz because at 1.19GHz we get more precise
HDMI pixel clock (1.19G/16 = 74.4MHz) for 1280x720p@60Hz HDMI
(74.25MHz required by standards). Closer pixel clock means better
compatibility to HDMI monitors.

Signed-off-by: Guodong Xu <guodong.xu@linaro.org>
Signed-off-by: Xinliang Liu <xinliang.liu@linaro.org>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/1467189955-21694-1-git-send-email-guodong.xu@linaro.org
2016-07-06 15:20:31 -07:00
Paul Gortmaker
1f501d632e clk: meson: make gxbb explicitly non-modular
The Kconfig currently controlling compilation of this code is:

drivers/clk/meson/Kconfig:config COMMON_CLK_GXBB
drivers/clk/meson/Kconfig:      bool

...meaning that it currently is not being built as a module by anyone.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

Also note that MODULE_DEVICE_TABLE and ALIAS are no-op for non-modules.

We also delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Carlo Caione <carlo@caione.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: linux-clk@vger.kernel.org
Cc: linux-amlogic@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160704211220.5685-3-paul.gortmaker@windriver.com
2016-07-06 15:20:26 -07:00
Paul Gortmaker
a718ce38d4 clk: meson8b: make it explicitly non-modular
The Kconfig currently controlling compilation of this code is:

drivers/clk/meson/Kconfig:config COMMON_CLK_MESON8B
drivers/clk/meson/Kconfig:      bool

...meaning that it currently is not being built as a module by anyone.
However a recent commit added a bunch of modular boilerplate to this
driver.

Lets remove the modular code that is essentially orphaned, so that
when reading the driver there is no doubt it is builtin-only.

Since module_init translates to device_initcall in the non-modular
case, the init ordering remains unchanged with this commit.

Also note that MODULE DEVICE_TABLE/ALIAS are no-op when non-modular.

We also delete the MODULE_LICENSE tag etc. since all that information
was (or is now) contained at the top of the file in the comments.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Carlo Caione <carlo@caione.org>
Cc: Kevin Hilman <khilman@baylibre.com>
Cc: linux-clk@vger.kernel.org
Cc: linux-amlogic@lists.infradead.org
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20160704211220.5685-2-paul.gortmaker@windriver.com
2016-07-06 15:15:54 -07:00
Michael Turquette
9d69286391 Merge tag 'sunxi-clk-fixes-for-4.7' of https://git.kernel.org/pub/scm/linux/kernel/git/mripard/linux into clk-fixes
Allwinner clock fixes for 4.7

A bunch of changes for the display clocks merged in 4.7
2016-07-06 01:25:08 -07:00
Linus Walleij
cdbf85c1ce clk: qcom: add EBI2 clocks to the MSM8660 GCC
This adds the EBI2 2X and EBI2 clocks to the MSM8660/APQ8060
GCC. This is necessary to enable clocking of the external bus
interface so that peripherals on it can be mounted. These two
clocks are simple gated branch clocks.

In the vendor tree clock-8x60, these clocks have some kind of
dependency, the EBI2 clock has .depends = &ebi2_2x_clk.c,
what this means is undocumented, it doesn't seem like there
is a parent/child relationship, so the solution I chose was to
just have the EBI2 driver get and enable both clocks.

Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Bjorn Andersson <bjorn.andersson@linaro.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 18:12:45 -07:00
Dong Aisheng
e8e628fb3f clk: imx7d: only enable minimum required clocks
Formerly clk core does not support imx7d clock type well that all
its clock operations requires the parent clock on.
Therefore we enabled all clocks by default in clock driver
initialization for other module clocks operate well.

After patch 'clk: imx7d: using api with flag CLK_OPS_PARENT_ENABLE',
clk core can handle such clock type well, so we don't have to enable
them all by default anymore. Instead, we only enable a minimum required
set of clocks.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:43:21 -07:00
Dong Aisheng
cbeac74a58 clk: imx7d: using api with flag CLK_OPS_PARENT_ENABLE
i.MX7D requires all clocks operations including enable/disable,
rate change and re-parent with its parent clock on.
Changing to the correct APIs to tell clk core such requirement.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:43:20 -07:00
Dong Aisheng
39c29498ce clk: imx: add clk api for supporting CLK_OPS_PARENT_ENABLE clocks
IMX SoCs like i.MX7D requires using CLK_OPS_PARENT_ENABLE flags,
adding the corresponding clock APIs variants for easily to use.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:43:19 -07:00
Dong Aisheng
5afc99417f clk: imx: re-order and concentrate the same type of clk api
Re-order and concentrate the same type of clk api for better
code maintenance.

Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:43:18 -07:00
Dong Aisheng
fc8726a2c0 clk: core: support clocks which requires parents enable (part 2)
On Freescale i.MX7D platform, all clocks operations, including
enable/disable, rate change and re-parent, requires its parent clock on.
Current clock core can not support it well.
This patch adding flag CLK_OPS_PARENT_ENABLE to handle this special case in
clock core that enable its parent clock firstly for each operation and
disable it later after operation complete.

The patch part 2 fixes set clock rate and set parent while its parent
is off. The most special case is for set_parent() operation which requires
all parents including both old and new one to be enabled at the same time
during the operation.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
[sboyd@codeaurora.org: Move set_rate tracepoint after prepare_enable]
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:42:56 -07:00
Dong Aisheng
a4b3518d14 clk: core: support clocks which requires parents enable (part 1)
On Freescale i.MX7D platform, all clocks operations, including
enable/disable, rate change and re-parent, requires its parent
clock enable. Current clock core can not support it well.
This patch introduce a new flag CLK_OPS_PARENT_ENABLE to handle this
special case in clock core that enable its parent clock firstly for
each operation and disable it later after operation complete.

The patch part 1 fixes the possible disabling clocks while its parent
is off during kernel booting phase in clk_disable_unused_subtree().

Before the completion of kernel booting, clock tree is still not built
completely, there may be a case that the child clock is on but its
parent is off which could be caused by either HW initial reset state
or bootloader initialization.

Taking bootloader as an example, we may enable all clocks in HW by default.
And during kernel booting time, the parent clock could be disabled in its
driver probe due to calling clk_prepare_enable and clk_disable_unprepare.
Because it's child clock is only enabled in HW while its SW usecount
in clock tree is still 0, so clk_disable of parent clock will gate
the parent clock in both HW and SW usecount ultimately. Then there will
be a child clock is still on in HW but its parent is already off.

Later in clk_disable_unused(), this clock disable accessing while its
parent off will cause system hang due to the limitation of HW which
must require its parent on.

This patch simply enables the parent clock first before disabling
if flag CLK_OPS_PARENT_ENABLE is set in clk_disable_unused_subtree().
This is a simple solution and only affects booting time.

After kernel booting up the clock tree is already created, there will
be no case that child is off but its parent is off.
So no need do this checking for normal clk_disable() later.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:40:23 -07:00
Dong Aisheng
7ec986efed clk: move clk_disable_unused after clk_core_disable_unprepare function
No function level change, just moving code place.
clk_disable_unused function will need to call clk_core_prepare_enable/
clk_core_disable_unprepare when adding CLK_OPS_PARENT_ENABLE features.
So move it after clk_core_disable_unprepare to avoid adding forward
declared functions later.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:40:20 -07:00
Dong Aisheng
a6adc30ba7 clk: introduce clk_core_enable_lock and clk_core_disable_lock functions
This can be useful when clock core wants to enable/disable clocks.
Then we don't have to convert the struct clk_core to struct clk to call
clk_enable/clk_disable which is a bit un-align with exist using.

And after introduce clk_core_{enable|disable}_lock, we can refine
clk_enable and clk_disable a bit.

As well as clk_core_{enable|disable}_lock, we also added
clk_core_{prepare|unprepare}_lock and clk_core_prepare_enable/
clk_core_unprepare_disable for clock core to easily use.

Cc: Michael Turquette <mturquette@baylibre.com>
Cc: Stephen Boyd <sboyd@codeaurora.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-07-01 17:40:18 -07:00
Stephen Boyd
582e2405b2 Placeholder for the rk3399 watchdog pclk, some newly exported
rk3228 clockids and a small fix for the not yet used spdif to
 displayport clock on the rk3399.
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Merge tag 'v4.8-rockchip-clk1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip into clk-next

Pull rockchip clk driver updates from Heiko Stuebner:

Placeholder for the rk3399 watchdog pclk, some newly exported
rk3228 clockids and a small fix for the not yet used spdif to
displayport clock on the rk3399.

* tag 'v4.8-rockchip-clk1' of git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip:
  clk: rockchip: fix incorrect rk3399 spdif-DPTX divider bits
  clk: rockchip: export rk3228 MAC clocks
  clk: rockchip: rename rk3228 sclk_macphy_50m to sclk_mac_extclk
  clk: rockchip: export rk3228 audio clocks
  clk: rockchip: include rk3228 downstream muxes into fractional dividers
  clk: rockchip: fix incorrect rk3228 clock registers
  clk: rockchip: add clock-ids for rk3228 MAC clocks
  clk: rockchip: add clock-ids for rk3228 audio clocks
  clk: rockchip: add a dummy clock for the watchdog pclk on rk3399
2016-07-01 17:30:42 -07:00