Stephen Boyd [Sat, 27 Jan 2018 00:41:52 +0000 (16:41 -0800)]
Merge branches 'clk-at91', 'clk-imx7ulp', 'clk-axigen', 'clk-si5351' and 'clk-pxa' into clk-next
* clk-at91:
clk: at91: pmc: Support backup for programmable clocks
clk: at91: pmc: Save SCSR during suspend
clk: at91: pmc: Wait for clocks when resuming
* clk-imx7ulp:
clk: Don't touch hardware when reparenting during registration
* clk-axigen:
clk: axi-clkgen: Round closest in round_rate() and recalc_rate()
clk: axi-clkgen: Correctly handle nocount bit in recalc_rate()
* clk-si5351:
clk: si5351: _si5351_clkout_reset_pll() can be static
clk: si5351: Do not enable parent clocks on probe
clk: si5351: Rename internal plls to avoid name collisions
clk: si5351: Apply PLL soft reset before enabling the outputs
clk: si5351: Add DT property to enable PLL reset
clk: si5351: implement remove handler
Stephen Boyd [Sat, 27 Jan 2018 00:41:47 +0000 (16:41 -0800)]
Merge branches 'clk-spreadtrum', 'clk-mvebu-dvfs', 'clk-qoriq', 'clk-imx' and 'clk-qcom-ipq8074' into clk-next
* clk-spreadtrum:
clk: sprd: add clocks support for SC9860
clk: sprd: Add dt-bindings include file for SC9860
dt-bindings: Add Spreadtrum clock binding documentation
clk: sprd: add adjustable pll support
clk: sprd: add composite clock support
clk: sprd: add divider clock support
clk: sprd: add mux clock support
clk: sprd: add gate clock support
clk: sprd: Add common infrastructure
clk: move clock common macros out from vendor directories
* clk-mvebu-dvfs:
clk: mvebu: armada-37xx-periph: add DVFS support for cpu clocks
clk: mvebu: armada-37xx-periph: prepare cpu clk to be used with DVFS
clk: mvebu: armada-37xx-periph: cosmetic changes
* clk-qoriq:
clk: qoriq: add more divider clocks support
* clk-imx:
clk: imx51: uart4, uart5 gates only exist on imx50, imx53
* clk-qcom-ipq8074:
clk: qcom: ipq8074: add misc resets for PCIE and NSS
dt-bindings: clock: qcom: add misc resets for PCIE and NSS
clk: qcom: ipq8074: add GP and Crypto clocks
clk: qcom: ipq8074: add NSS ethernet port clocks
clk: qcom: ipq8074: add NSS clocks
clk: qcom: ipq8074: add PCIE, USB and SDCC clocks
clk: qcom: ipq8074: add remaining PLL’s
dt-bindings: clock: qcom: add remaining clocks for IPQ8074
clk: qcom: ipq8074: fix missing GPLL0 divider width
clk: qcom: add parent map for regmap mux
clk: qcom: add read-only divider operations
Stephen Boyd [Sat, 27 Jan 2018 00:41:39 +0000 (16:41 -0800)]
Merge branches 'clk-qcom-alpha-pll', 'clk-check-ops-ptr', 'clk-protect-rate' and 'clk-omap' into clk-next
* clk-qcom-alpha-pll:
clk: qcom: add read-only alpha pll post divider operations
clk: qcom: support for 2 bit PLL post divider
clk: qcom: support Brammo type Alpha PLL
clk: qcom: support Huayra type Alpha PLL
clk: qcom: support for dynamic updating the PLL
clk: qcom: support for alpha mode configuration
clk: qcom: flag for 64 bit CONFIG_CTL
clk: qcom: fix 16 bit alpha support calculation
clk: qcom: support for alpha pll properties
* clk-check-ops-ptr:
clk: check ops pointer on clock register
* clk-protect-rate:
clk: fix set_rate_range when current rate is out of range
clk: add clk_rate_exclusive api
clk: cosmetic changes to clk_summary debugfs entry
clk: add clock protection mechanism to clk core
clk: use round rate to bail out early in set_rate
clk: rework calls to round and determine rate callbacks
clk: add clk_core_set_phase_nolock function
clk: take the prepare lock out of clk_core_set_parent
clk: fix incorrect usage of ENOSYS
* clk-omap:
clk: ti: Drop legacy clk-3xxx-legacy code
Igor Grinberg [Tue, 26 Dec 2017 13:30:36 +0000 (15:30 +0200)]
clk: pxa: unbreak lookup of CLK_POUT
Since switching to clk drivers, the CLK_POUT cannot be searched for by
clk_get() API and thus it returns with ENOENT.
Register it with the clk_lookup and thus unbreak the users of it.
Signed-off-by: Igor Grinberg <grinberg@compulab.co.il> Acked-by: Robert Jarzmik <robert.jarzmik@free.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The si5351 driver should not prepare or enable other clocks in the tree on
probe. Let the clients decide when to prepare or enable the clocks.
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: Rabeeh Khoury <rabeeh@solid-run.com> Signed-off-by: Sergej Sawazki <ce3a@gmx.de>
[sboyd@codeaurora.org: Remove most of the .remove function too] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
clk: si5351: Rename internal plls to avoid name collisions
This drivers probe fails due to a clock name collision if a clock named
'plla' or 'pllb' is already registered when registering this drivers
internal plls.
Fix it by renaming internal plls to avoid name collisions.
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: Rabeeh Khoury <rabeeh@solid-run.com> Signed-off-by: Sergej Sawazki <sergej@taudac.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
clk: si5351: Apply PLL soft reset before enabling the outputs
The "Si5351A/B/C Data Sheet" states to apply a PLL soft reset before
enabling the output clocks [1]. This is required to get a deterministic
phase relationship between the output clocks.
Without resetting the PLL, the phase relationship between the clocks is
unpredictable. Fix this by resetting the PLL in si5351_clkout_prepare().
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: Rabeeh Khoury <rabeeh@solid-run.com> Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Sergej Sawazki <sergej@taudac.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Add optional output clock DT property to enable PLL reset when a clock
output is enabled.
Cc: Sebastian Hesselbarth <sebastian.hesselbarth@gmail.com> Cc: Rabeeh Khoury <rabeeh@solid-run.com> Cc: Russell King <linux@armlinux.org.uk> Signed-off-by: Sergej Sawazki <sergej@taudac.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
clk: axi-clkgen: Correctly handle nocount bit in recalc_rate()
If the nocount bit is set the divider is bypassed and the settings for the
divider count should be ignored and a divider value of 1 should be assumed.
Handle this correctly in the driver recalc_rate() callback.
While the driver sets up the part so that the read back dividers values
yield the correct result the power-on reset settings of the part might not
reflect this and hence calling e.g. clk_get_rate() without prior calls to
clk_set_rate() will yield the wrong result.
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Stephen Boyd [Thu, 2 Nov 2017 07:36:09 +0000 (00:36 -0700)]
clk: Don't touch hardware when reparenting during registration
The orphan clocks reparent operation shouldn't touch the hardware
if clocks are enabled, otherwise it may get a chance to disable a
newly registered critical clock which triggers the warning below.
Assuming we have two clocks: A and B, B is the parent of A.
Clock A has flag: CLK_OPS_PARENT_ENABLE
Clock B has flag: CLK_IS_CRITICAL
Step 1:
Clock A is registered, then it becomes orphan.
Step 2:
Clock B is registered. Before clock B reach the critical clock enable
operation, orphan A will find the newly registered parent B and do
reparent operation, then parent B will be finally disabled in
__clk_set_parent_after() due to CLK_OPS_PARENT_ENABLE flag as there's
still no users of B which will then trigger the following warning.
We know that the clk isn't enabled with any sort of prepare_count
here so we don't need to enable anything to prevent a race. And
we're holding the prepare mutex so set_rate/set_parent can't race
here either. Based on an earlier patch by Dong Aisheng.
Fixes: fc8726a2c021 ("clk: core: support clocks which requires parents enable (part 2)") Cc: Michael Turquette <mturquette@baylibre.com> Cc: Shawn Guo <shawnguo@kernel.org> Reported-by: Dong Aisheng <aisheng.dong@nxp.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Romain Izard [Mon, 11 Dec 2017 16:55:35 +0000 (17:55 +0100)]
clk: at91: pmc: Support backup for programmable clocks
When an AT91 programmable clock is declared in the device tree, register
it into the Power Management Controller driver. On entering suspend mode,
the driver saves and restores the Programmable Clock registers to support
the backup mode for these clocks.
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Romain Izard [Mon, 11 Dec 2017 16:55:34 +0000 (17:55 +0100)]
clk: at91: pmc: Save SCSR during suspend
The contents of the System Clock Status Register (SCSR) needs to be
restored into the System Clock Enable Register (SCER).
As the bootloader will restore some clocks by itself, the issue can be
missed as only the USB controller, the LCD controller, the Image Sensor
controller and the programmable clocks will be impacted.
Fix the obvious typo in the suspend/resume code, as the IMR register
does not need to be saved twice.
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Romain Izard [Mon, 11 Dec 2017 16:55:33 +0000 (17:55 +0100)]
clk: at91: pmc: Wait for clocks when resuming
Wait for the syncronization of all clocks when resuming, not only the
UPLL clock. Do not use regmap_read_poll_timeout, as it will call BUG()
when interrupts are masked, which is the case in here.
Signed-off-by: Romain Izard <romain.izard.pro@gmail.com> Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com> Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Acked-by: Alexandre Belloni <alexandre.belloni@free-electrons.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:40 +0000 (19:55 +0530)]
clk: qcom: ipq8074: add GP and Crypto clocks
- It has 3 general purpose clock controller which supplies
the clock in GPIO pins.
- It has Crypto Engine which has AXI, AHB and Core clocks.
Other non APSS processors can also use Crypto Engine so
these clocks are marked as VOTED clocks.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:39 +0000 (19:55 +0530)]
clk: qcom: ipq8074: add NSS ethernet port clocks
IPQ8074 has 6 ethernet ports which supports all ethernet speeds
from 10Mpbs to 10 Gpbs and each speed requires different clock
rates. Each port has separate TX and RX clocks. These clocks
use separate external UNIPHY PLL’s which will be registered with
separate NSS driver. The clock frequency is 125 Mhz for UNIPHY0
and 312.5 Mhz for UNIPHY1 and UNIPHY2.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:38 +0000 (19:55 +0530)]
clk: qcom: ipq8074: add NSS clocks
IPQ8074 has NSS (Network Switching System) which has 2 UBI cores
and hardware crypto engine. Some clocks are separate for each UBI
core and remaining NSS clocks are common. The BIAS_PLL (300 Mhz)
and BIAS_PLL_NSS_NOC (416.5 Mhz) are external fixed clocks and
will be registered from dtsi or NSS driver.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:37 +0000 (19:55 +0530)]
clk: qcom: ipq8074: add PCIE, USB and SDCC clocks
- It has 2 instances of PCIE which uses AXI, AHB, AUX, SYS NOC
AXI and PIPE clocks.
- It has 2 instances of USB 3.0 which uses AUX, SLEEP, PIPE,
SYS NOC, mock UTMI and master clocks.
- It has 2 instances of SDCC which uses APSS and AHB clock.
SDCC1 requires ICE core clock also.
- All the PIPE clocks are external clocks which will be
registered in clock framework by PHY drivers. The enabling
and disabling of PIPE RCG clocks are dependent upon PHY
initialization sequence so BRANCH_HALT_DELAY flag is required for
these clocks.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:36 +0000 (19:55 +0530)]
clk: qcom: ipq8074: add remaining PLL’s
- GPLL2, GPLL4 and GPLL6 are general PLL clocks and parent
for all core peripherals.
- UBI PLL is mainly used by NSS (Network Switching System).
IPQ8074 has 2 instances of NSS UBI cores and UBI PLL will
be used to control the core frequency.
- NSS Crypto PLL is mainly used by NSS Crypto Engine which
supports the multiple cryptographic algorithm used in
Ethernet.
- IPQ8074 frequency plan does not require change in PLL post
dividers so marked the same as read-only.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:35 +0000 (19:55 +0530)]
dt-bindings: clock: qcom: add remaining clocks for IPQ8074
This patch adds the DT bindings for following IPQ8074 clocks
- General PLL’s, NSS UBI PLL and NSS Crypto PLL.
- 2 instances of PCIE, USB, SDCC.
- 2 NSS UBI core and common NSS clocks. NSS is network switching
system which accelerates the ethernet traffic. IPQ8074
NSS has two UBI cores. Some clocks are separate for each UBI core
and remaining NSS clocks are common.
- NSS ethernet port clocks. IPQ8074 has 6 ethernet ports and
each port uses different TX and RX clocks.
- Crypto engine clocks.
- General purpose clocks which comes over GPIO.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:33 +0000 (19:55 +0530)]
clk: qcom: add parent map for regmap mux
Currently the driver assumes the register configuration value
is identical to its index in the parent map. This patch adds
the parent map field in regmap mux clock node which contains
the mapping of parent index with actual register configuration
value. If regmap node contains this parent map then the
configuration value will be taken from this
parent map instead of simply writing the index value.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Abhishek Sahu [Wed, 13 Dec 2017 14:25:32 +0000 (19:55 +0530)]
clk: qcom: add read-only divider operations
Some of the divider settings are preconfigured and should not
be changed by the clock framework during frequency change. This
patch adds the read-only divider operation for QCOM dividers
which is equivalent to generic divider operations in
'commit 79c6ab509558 ("clk: divider: add CLK_DIVIDER_READ_ONLY flag")'.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Philipp Zabel [Wed, 13 Dec 2017 11:57:48 +0000 (12:57 +0100)]
clk: imx51: uart4, uart5 gates only exist on imx50, imx53
i.MX51 only has 3 UARTs and no CCGR7 register. In place of the CCGR7
register on i.MX50/i.MX53 that contains the ipg and per clock gates
for UARTs 4 and 5, on i.MX51 there is the CMEOR register.
Without this patch, the code disabling the UART clocks would also clear
the mod_en_ov_vpu bit in the CMEOR register, among others, which causes
register accesses to the VPU to lock up the system.
Signed-off-by: Philipp Zabel <p.zabel@pengutronix.de> Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Gregory CLEMENT [Thu, 30 Nov 2017 13:40:29 +0000 (14:40 +0100)]
clk: mvebu: armada-37xx-periph: add DVFS support for cpu clocks
When DVFS is enabled the CPU clock setting is done using an other set of
registers.
These Power Management registers are exposed through a syscon as they
will also be used by other drivers such as the cpufreq.
This patch add the possibility to modify the CPU frequency using the
associate load level matching the target frequency. Then all the
frequency switch is handle by the hardware.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com>
[sboyd@codeaurora.org: Grow a local variable for regmap pointer
to keep lines shorter] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Gregory CLEMENT [Thu, 30 Nov 2017 13:40:28 +0000 (14:40 +0100)]
clk: mvebu: armada-37xx-periph: prepare cpu clk to be used with DVFS
When DVFS will be enabled then the cpu clk will use a different set of
register at run time. That means that we won't be able to use the common
callback and need to use our own ones.
This patch prepares this change by switching on our own set of callbacks
without modifying the behavior of the clocks.
Signed-off-by: Gregory CLEMENT <gregory.clement@free-electrons.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Chunyan Zhang [Thu, 7 Dec 2017 12:57:07 +0000 (20:57 +0800)]
clk: sprd: add mux clock support
This patch adds clock multiplexor support for Spreadtrum platforms,
the mux clocks also can be found in sprd composite clocks, so
provides two helpers that can be reused later on.
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Chunyan Zhang [Thu, 7 Dec 2017 12:57:04 +0000 (20:57 +0800)]
clk: move clock common macros out from vendor directories
These macros are used by more than one SoC vendor platforms, avoid to
have many copies of these code, this patch moves them to the common
header file which every clock drivers can access to.
Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Jerome Brunet [Fri, 1 Dec 2017 21:52:00 +0000 (22:52 +0100)]
clk: fix set_rate_range when current rate is out of range
Calling clk_core_set_rate() with core->req_rate is basically a no-op
because of the early bail-out mechanism.
This may leave the clock in inconsistent state if the rate is out the
requested range. Calling clk_core_set_rate() with the closest rate
limit could solve the problem but:
- The underlying determine_rate() callback needs to account for this
corner case (rounding within the range, if possible)
- if only round_rate() is available, we rely on luck unfortunately.
Fixes: 1c8e600440c7 ("clk: Add rate constraints to clocks") Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20171201215200.23523-11-jbrunet@baylibre.com
Jerome Brunet [Fri, 1 Dec 2017 21:51:59 +0000 (22:51 +0100)]
clk: add clk_rate_exclusive api
Using clock rate protection, we can now provide a way for clock consumer
to claim exclusive control over the rate of a producer
So far, rate change operations have been a "last write wins" affair. This
changes allows drivers to explicitly protect against this behavior, if
required.
Of course, if exclusivity over a producer is claimed more than once, the
rate is effectively locked as exclusivity cannot be preempted
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20171201215200.23523-10-jbrunet@baylibre.com
Jerome Brunet [Fri, 1 Dec 2017 21:51:57 +0000 (22:51 +0100)]
clk: cosmetic changes to clk_summary debugfs entry
clk_summary debugfs entry was already well over the traditional 80
characters per line limit but it grew even larger with the addition of
clock protection.
Jerome Brunet [Fri, 1 Dec 2017 21:51:56 +0000 (22:51 +0100)]
clk: add clock protection mechanism to clk core
The patch adds clk_core_protect and clk_core_unprotect to the internal
CCF API. These functions allow to set a new constraint along the clock
tree to prevent any change, even indirect, which may result in rate
change or glitch.
Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20171201215200.23523-7-jbrunet@baylibre.com
Jerome Brunet [Fri, 1 Dec 2017 21:51:55 +0000 (22:51 +0100)]
clk: use round rate to bail out early in set_rate
The current implementation of clk_core_set_rate_nolock() bails out early
if the requested rate is exactly the same as the one set. It should bail
out if the request would not result in a rate a change. This is important
when the rate is not exactly what is requested, which is fairly common
with PLLs.
Ex: provider able to give any rate with steps of 100Hz
- 1st consumer request 48000Hz and gets it.
- 2nd consumer request 48010Hz as well. If we were to perform the usual
mechanism, we would get 48000Hz as well. The clock would not change so
there is no point performing any checks to make sure the clock can
change, we know it won't.
This is important to prepare the addition of the clock protection
mechanism
Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Quentin Schulz <quentin.schulz@free-electrons.com> Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20171201215200.23523-6-jbrunet@baylibre.com
Jerome Brunet [Fri, 1 Dec 2017 21:51:54 +0000 (22:51 +0100)]
clk: rework calls to round and determine rate callbacks
Rework the way the callbacks round_rate() and determine_rate() are called.
The goal is to do this at a single point and make it easier to add
conditions before calling them.
Because of this factorization, rate returned by determine_rate() is also
checked against the min and max rate values
This rework is done to ease the integration of "protected" clock
functionality.
Acked-by: Linus Walleij <linus.walleij@linaro.org> Tested-by: Quentin Schulz <quentin.schulz@free-electrons.com> Tested-by: Maxime Ripard <maxime.ripard@free-electrons.com> Acked-by: Michael Turquette <mturquette@baylibre.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20171201215200.23523-5-jbrunet@baylibre.com
Jerome Brunet [Tue, 19 Dec 2017 08:33:29 +0000 (09:33 +0100)]
clk: check ops pointer on clock register
Nothing really prevents a provider from (trying to) register a clock
without providing the clock ops structure.
We do check the individual fields before using them, but not the
structure pointer itself. This may have the usual nasty consequences when
the pointer is dereferenced, most likely when checking one the field
during the initialization.
This is fixed by returning an error on clock register if the ops pointer
is NULL.
Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
Link: lkml.kernel.org/r/20171219083329.24746-1-jbrunet@baylibre.com
clk: qcom: add read-only alpha pll post divider operations
Some of the divider settings are preconfigured and should not
be changed by the clock framework during frequency change. This
patch adds the read-only divider operation for QCOM alpha pll
post divider which is equivalent to generic divider operations in
'commit 79c6ab509558 ("clk: divider: add CLK_DIVIDER_READ_ONLY flag")'.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The Brammo type of Alpha PLL doesn't allow configuration of a
VCO, but it does support dynamic update in which the frequency
can be changed dynamically without turning off the PLL.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The Huayra type Alpha PLL has a 16 bit alpha value, and
depending on the alpha_mode, the alpha value can be treated as
M/N value or as a two’s compliment number. This PLL supports
dynamic programming.
Since the decoding of alpha val and dynamic programming are
completely different from other Alpha PLLs we add separate
functions for Huayra PLLs.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Some of the Alpha PLLs support dynamic update in which the
frequency can be changed dynamically without turning off the PLL.
This dynamic update requires the following sequence:
1. Write the desired values to L_VAL and ALPHA_VAL registers
2. Toggle pll_latch_input from low to high
3. Wait for pll_ack_latch to transition from low to high
The new L and alpha values have been latched. It may
take some time for the PLL to fully settle with these
new values.
4. Pull pll_latch_input low
Signed-off-by: Rajendra Nayak <rnayak@codeaurora.org> Signed-off-by: Taniya Das <tdas@codeaurora.org> Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Some of the Alpha PLLs (like Spark and Brammo) don't have a
CONFIG_CTL_U register. Add logic to detect when PLLs don't have
this second config register and skip programming it during PLL
initialization.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
The alpha value calculation has been written for 40-bit alpha
values which doesn't work work properly for 16-bit ones. The
alpha value is calculated on the basis of ALPHA_BITWIDTH to make
the computation easy for 40 bit alpha. After calculating the 32
bit alpha, it is converted to 40 bit alpha by making lower bits
zero. But if actual alpha register width is less than
ALPHA_BITWIDTH, then the actual width can be used for
calculation. This also means, during the 40 bit alpha pll set
rate path, the lower alpha register is not configured
Change the code to calculate the rate and register values from
'alpha_width' instead of hard-coding it so that it can work for
the different widths that are supported.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Alpha PLL is a generic name used for QCOM PLLs which uses L and
Alpha values for configuring the integer and fractional part.
QCOM SoCs use different types of Alpha PLLs for which basic
software configuration part is common with following differences.
1. All these PLLs have the same basic registers like
PLL_MODE, L_VAL, ALPHA_VAL but some of the register offsets are
different between PLLs types.
2. The dynamic programming sequence is different in some
of the Alpha PLLs
3. Some of the PLLs don’t have 64 bit config control, 64 bit
user control, VCO configuration, etc.
Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com> Acked-by: Alexandre TORGUE <alexandre.torgue@st.com> CC: Gabriel Fernandez <gabriel.fernandez@st.com> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Acked-by: Gabriel Fernandez <gabriel.fernandez@st.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Kaihua Zhong [Fri, 17 Nov 2017 09:27:31 +0000 (17:27 +0800)]
clk: hisilicon: Add support for Hi3660 stub clocks
Hi3660 has four stub clocks, which are big and LITTLE cluster clocks,
GPU clock and DDR clock. These clocks ask MCU for frequency scaling
by sending message through mailbox.
This commit adds support for stub clocks, it requests the dedicated
mailbox channel at initialization; then later uses this channel to send
message to MCU to execute frequency scaling. The four stub clocks share
the same mailbox channel, but every stub clock has its own command id so
MCU can distinguish the requirement coming for which clock.
A shared memory is used to present effective frequency value, so the
clock driver uses I/O mapping for the memory and reads back rate value.
Reviewed-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Kai Zhao <zhaokai1@hisilicon.com> Signed-off-by: Tao Wang <kevin.wangtao@hisilicon.com> Signed-off-by: Ruyi Wang <wangruyi@huawei.com> Signed-off-by: Kaihua Zhong <zhongkaihua@huawei.com>
[sboyd: Fix possible out of bounds access in hi3660_stub_clk_hw_get(),
use devm_of_clk_add_hw_provider(), devm_ioremap() returns
NULL not error pointers] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Stephen Boyd [Thu, 7 Dec 2017 06:41:44 +0000 (22:41 -0800)]
Merge branch 'clk-pr-err' into clk-next
* clk-pr-err:
clk: h8300: pr_err() strings should end with newlines
clk: h8s2678: pr_err() strings should end with newlines
SPEAr: clk: pr_err() strings should end with newlines
clk: SPEAr: pr_err() strings should end with newlines
clk: lpc32xx: pr_err() strings should end with newlines
clk: stm32f4: pr_err() strings should end with newlines
clk: qcom: msm8916: Fix i2s clk rates required for mclk
lpaif i2s clk rates in the freq table are not accurate enough
for I2S mclk. Fix the inaccurate ones and add few more clock
rates that are used in LPASS audio driver.
Signed-off-by: Srinivas Kandagatla <srinivas.kandagatla@linaro.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Tirupathi Reddy [Tue, 21 Nov 2017 09:11:04 +0000 (14:41 +0530)]
clk: qcom: Add spmi_pmic clock divider support
Clkdiv module provides a clock output on the PMIC with CXO as
the source. This clock can be routed through PMIC GPIOs. Add
a device driver to configure this clkdiv module.
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>
[sboyd: Simplified code and moved to devm clk provider APIs] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
This patch adds device tree bindings for Qualcomm SPMI PMIC
clock divider module.
Signed-off-by: Tirupathi Reddy <tirupath@codeaurora.org>
[sboyd: Moved file to match compatible of binding] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Cai Li [Tue, 21 Nov 2017 09:24:38 +0000 (17:24 +0800)]
clk: fix a panic error caused by accessing NULL pointer
In some cases the clock parent would be set NULL when doing re-parent,
it will cause a NULL pointer accessing if clk_set trace event is
enabled.
This patch sets the parent as "none" if the input parameter is NULL.
Fixes: dfc202ead312 (clk: Add tracepoints for hardware operations) Signed-off-by: Cai Li <cai.li@spreadtrum.com> Signed-off-by: Chunyan Zhang <chunyan.zhang@spreadtrum.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Marek Szyprowski [Thu, 30 Nov 2017 12:14:51 +0000 (13:14 +0100)]
clk: Manage proper runtime PM state in clk_change_rate()
clk_change_rate() propagates rate change down to all its children. Such
operation requires managing proper runtime PM state of each child, what
was missing. Add needed calls to clk_pm_runtime*() to ensure that
set_rate() clock callback is called on runtime active clock.
This fixes following issue found on Exynos5433 TM2 board with devfreq
enabled:
Tero Kristo [Tue, 26 Sep 2017 12:36:43 +0000 (15:36 +0300)]
clk: ti: omap4: clkctrl data fixes for opt-clocks
Re-route all opt-clocks to use the new clkctrl clocks also, instead of
depending on the old dt clocks. Also, add aliases for certain clkctrl
clocks that hwmod core depends upon. The alias list can be stripped
down once hwmod database no longer needs these.
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