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Use at91 specific functions to free all resources in case of error.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Improve error path for sama5d4 sck registration.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Remove unnecessary line.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Improve error path for sam9x5 slow clock registration.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add support to free slow clock oscillator resources.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add support to free slow rc oscillator resources.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add support to free slow oscillator resources.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add support for SAM9X60's slow clock.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Different IPs uses different bit offsets in registers for the same
functionality, thus adapt the driver to support this.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The slow clock of SAMA5D4 has no bypass support thus remove it.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Based on 1 normalized pattern(s):
this program is free software you can redistribute it and or modify
it under the terms of the gnu general public license as published by
the free software foundation either version 2 of the license or at
your option any later version
extracted by the scancode license scanner the SPDX license identifier
GPL-2.0-or-later
has been chosen to replace the boilerplate/reference in 3029 file(s).
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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and 'clk-spdx' into clk-next
- Support for STM32F769
- Rework AT91 sckc DT bindings
- Fix slow RC oscillator issue on sama5d3
- AT91 sam9x60 PMC support
- SiFive FU540 PRCI and PLL support
* clk-stm32f4:
clk: stm32mp1: Add ddrperfm clock
clk: stm32: Introduce clocks of STM32F769 board
* clk-tegra:
clk: tegra: divider: Mark Memory Controller clock as read-only
clk: tegra: emc: Replace BUG() with WARN_ONCE()
clk: tegra: emc: Fix EMC max-rate clamping
clk: tegra: emc: Support multiple RAM codes
clk: tegra: emc: Don't enable EMC clock manually
clk: tegra124: Remove lock-enable bit from PLLM
clk: tegra: Fix PLLM programming on Tegra124+ when PMC overrides divider
clk: tegra: Don't enable already enabled PLLs
* clk-at91:
clk: at91: Mark struct clk_range as const
clk: at91: add sam9x60 pmc driver
dt-bindings: clk: at91: add bindings for SAM9X60 pmc
clk: at91: add sam9x60 PLL driver
clk: at91: master: Add sam9x60 support
clk: at91: usb: Add sam9x60 support
clk: at91: allow configuring generated PCR layout
clk: at91: allow configuring peripheral PCR layout
clk: at91: sckc: handle different RC startup time
clk: at91: modernize sckc binding
dt-bindings: clock: at91: new sckc bindings
* clk-sifive-fu540:
clk: sifive: add a driver for the SiFive FU540 PRCI IP block
clk: analogbits: add Wide-Range PLL library
dt-bindings: clk: add documentation for the SiFive PRCI driver
* clk-spdx:
clk: sunxi-ng: Use the correct style for SPDX License Identifier
clk: sprd: Use the correct style for SPDX License Identifier
clk: renesas: Use the correct style for SPDX License Identifier
clk: qcom: Use the correct style for SPDX License Identifier
clk: davinci: Use the correct style for SPDX License Identifier
clk: actions: Use the correct style for SPDX License Identifier
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It's just some static data that doesn't get changed after being used.
Mark it const everywhere.
Cc: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a driver for the PMC clocks of the sam9c60.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Staticize spinlock]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The PLLs on the sam9x60 (PLLA and USB PLL) use a different register set and
programming model than the previous SoCs.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The sam9x60 cpu clock is located at a different offset but is otherwise
similar to the master clock.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The sam9x60 USB clock supports four different parents, ensure they can be
selected.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The PCR register layout for GCLKCSS is changing for the future SoCs, allow
configuring it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The PCR register actually changed layout for each SoC. By chance, this
didn't have impact on sama5d[2-4] support but since sama5d3, PID is seven
bits wide and sama5d4 and sama5d2 don't have DIV.
For the DT backward compatibility, keep the layout as is.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The sama5d3 slow RC oscillator as a different startup time than all the
previous SoCs. Handle that using its own compatible.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Remove the need for child nodes in the sckc binding and register the whole
sckc tree (3 clocks in total) from the sckc node.
DT backward compatibility is kept by looking for properties in child nodes
when they are not present in the sckc node.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The prescaler formula of the programmable clock has changed for sama5d2.
Update the driver accordingly.
Fixes: a2038077de9a ("clk: at91: add sama5d2 PMC driver")
Cc: <stable@vger.kernel.org> # v4.20+
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
[nicolas.ferre@microchip.com: adapt the prescaler range,
fix clk_programmable_recalc_rate, split patch]
Signed-off-by: Matthias Wieloch <matthias.wieloch@few-bauer.de>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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* clk-at91:
clk: at91: programmable: remove unneeded register read
clk: at91: optimize clk_round_rate() for AUDIO_PLL
clk: at91: enable AUDIOPLL as source for PCKx on SAMA5D2
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This register read is a leftover of a previous read/modify/write. We now use
regmap_update_bits(), so we don't need it anymore.
Signed-off-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Stop the search for parent rate when exact match is found.
This makes for 3 clk_round_rate() calls instead of 64 of them on
SAMA5D2-based board when searching for 12.288MHz clock.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Reviewed-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The master clock is actually named masterck earlier in the driver. Having
"mck" in the parent list means that it can never be selected.
Fixes: 1eabdc2f9dd8 ("clk: at91: add at91sam9x5 PMCs driver")
Fixes: a2038077de9a ("clk: at91: add sama5d2 PMC driver")
Fixes: 084b696bb509 ("clk: at91: add sama5d4 pmc driver")
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: <stable@vger.kernel.org> # v4.20+
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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nck() looks at the last id in an array and unfortunately,
at91sam9x35_periphck has a sentinel, hence the id is 0 and the calculated
number of peripheral clocks is 1 instead of a maximum of 31.
Fixes: 1eabdc2f9dd8 ("clk: at91: add at91sam9x5 PMCs driver")
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Cc: <stable@vger.kernel.org> # v4.20+
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Datasheet for SAMA5D2x mentions 6 sources for PCKx, the last being AUDIOPLL.
Signed-off-by: Michał Mirosław <mirq-linux@rere.qmqm.pl>
Acked-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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and 'clk-at91-pmc-rework' into clk-next
- Reset Controller (RMU) support for Actions Semi Owl S900 and S700 SoCs
- Rework at91 PMC clock driver for new DT bindings
* clk-actions-reset:
clk: actions: Add Actions Semi S900 SoC Reset Management Unit support
clk: actions: Add Actions Semi S700 SoC Reset Management Unit support
clk: actions: Add Actions Semi Owl SoCs Reset Management Unit support
dt-bindings: reset: Add binding constants for Actions Semi S900 RMU
dt-bindings: reset: Add binding constants for Actions Semi S700 RMU
dt-bindings: clock: Add reset controller bindings for Actions Semi Owl SoCs
clk: actions: Cache regmap info in private clock descriptor
* clk-imx7-init-critical:
clk: imx7d: remove CLK_IS_CRITICAL flag for arm_a7_root_clk
clk: imx: cpu clock should be always critical
clk: imx: imx7d: remove clks_init_on array
clk: imx: imx7d: remove unnecessary clocks from clks_init_on array
* clk-mmp2-ids:
clk: mmp2: fix the clock id for sdh2_clk and sdh3_clk
* clk-at91-pmc-rework:
clk: at91: move DT compatibility code to its own file
clk: at91: add at91sam9rl PMC driver
clk: at91: add at91sam9x5 PMCs driver
clk: at91: add at91sam9260 PMC driver
clk: at91: add sama5d2 PMC driver
clk: at91: add sama5d4 pmc driver
clk: at91: add new DT lookup function
dt-bindings: clk: at91: Document new PMC binding
clk: at91: add pmc_data struct and helpers
clk: at91: allow clock registration from C code
clk: at91: generated: set audio_pll_allowed in at91_clk_register_generated()
clk: at91: audio-pll: separate registration from DT parsing
clk: at91: h32mx: separate registration from DT parsing
clk: at91: generated: SSCs don't have a gclk
clk: at91: audio-pll: fix audio pmc type
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Move all the DT backward compatibility code to its own file so it can be
deleted later.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a driver for the PMC clocks of the at91sam9rl SoC.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Make i signed to fix signedness bug]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a driver for the PMC clocks of the at91sam9x5 SoCs
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Make i signed to fix signedness bug]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a driver for the PMC clocks of the at91sam9260, at91sam9261,
at91am9263 and at91sam9g20 SoCs.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Make i signed to fix signedness bug]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a driver for the PMC clocks of the sama5d2
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Make i signed to fix signedness bug]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a driver for the PMC clocks of the sama5d4
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Make i signed to fix signedness bug]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a new DT lookup function to lookup for PMC clocks.
Note that the #ifndef AT91_PMC_MOSCS section will be removed once all the
platforms are converted.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Acked-by: Rob Herring <robh@kernel.org>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add a new strut to handle references to all the PMC clocks and implement
allocation/free helpers.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Remove static keyword to allow functions to be used from other units. Also
move some struct and function declarations to pmc.h
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Include pmc.h]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Set gck->audio_pll_allowed in at91_clk_register_generated. This makes it
easier to do it from code that is not parsing device tree.
Also, this fixes an issue where the resulting clk_hw can be dereferenced
before being tested for error.
Fixes: 1a1a36d72e3d ("clk: at91: clk-generated: make gclk determine audio_pll rate")
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Separate registration out of of_sama5d2_clk_audio_pll*_setup to allow other
code to use it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
[sboyd@kernel.org: Include pmc.h]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Separate registration out of of_sama5d4_clk_h32mx_setup to allow other code
to use it.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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As the SSCs don't have gclk, don't check for their ID to allow them to set
the audio pll rate.
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The allocation for the audio pmc is using the size of struct clk_audio_pad
instead of struct clk_audio_pmc. This works fine because the former is
larger than the latter but it is safer to be correct.
Fixes: ("0865805d82d4 clk: at91: add audio pll clock drivers")
Signed-off-by: Alexandre Belloni <alexandre.belloni@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Commit a982e45dc150 ("clk: at91: PLL recalc_rate() now using cached MUL
and DIV values") removed a check that prevents a division by zero. This
now causes a stacktrace when booting the kernel on a at91 platform if
the PLL DIV register contains zero. This commit reintroduces this check.
Fixes: a982e45dc150 ("clk: at91: PLL recalc_rate() now using cached...")
Cc: <stable@vger.kernel.org>
Signed-off-by: Ronald Wahl <rwahl@gmx.de>
Acked-by: Ludovic Desroches <ludovic.desroches@microchip.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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This driver is a simple muxing driver that controls the
I2S's clock input by using syscon/regmap to change the parent.
The available inputs can be peripheral clock and generated clock.
Signed-off-by: Codrin Ciubotariu <codrin.ciubotariu@microchip.com>
[sboyd@kernel.org: Fix SPDX tag comment style]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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When a USB device is connected to the USB host port on the SAM9N12 then
you get "-62" error which seems to indicate USB replies from the device
are timing out. Based on a logic sniffer, I saw the USB bus was running
at half speed.
The PLL code uses cached MUL and DIV values which get set in set_rate()
and applied in prepare(), but the recalc_rate() function instead
queries the hardware instead of using these cached values. Therefore,
if recalc_rate() is called between a set_rate() and prepare(), the
wrong frequency is calculated and later the USB clock divider for the
SAM9N12 SOC will be configured for an incorrect clock.
In my case, the PLL hardware was set to 96 Mhz before the OHCI
driver loads, and therefore the usb clock divider was being set
to /2 even though the OHCI driver set the PLL to 48 Mhz.
As an alternative explanation, I noticed this was fixed in the past by
87e2ed338f1b ("clk: at91: fix recalc_rate implementation of PLL
driver") but the bug was later re-introduced by 1bdf02326b71 ("clk:
at91: make use of syscon/regmap internally").
Fixes: 1bdf02326b71 ("clk: at91: make use of syscon/regmap internally)
Cc: <stable@vger.kernel.org>
Signed-off-by: Marcin Ziemianowicz <marcin@ziemianowicz.com>
Acked-by: Boris Brezillon <boris.brezillon@bootlin.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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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>
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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>
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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>
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git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux
Pull clk updates from Stephen Boyd:
"We have two changes to the core framework this time around.
The first being a large change that introduces runtime PM support to
the clk framework. Now we properly call runtime PM operations on the
device providing a clk when the clk is in use. This helps on SoCs
where the clks provided by a device need something to be powered on
before using the clks, like power domains or regulators. It also helps
power those things down when clks aren't in use.
The other core change is a devm API addition for clk providers so we
can get rid of a bunch of clk driver remove functions that are just
doing of_clk_del_provider().
Outside of the core, we have the usual addition of clk drivers and
smattering of non-critical fixes to existing drivers. The biggest diff
is support for Mediatek MT2712 and MT7622 SoCs, but those patches
really just add a bunch of data.
By the way, we're trying something new here where we build the tree up
with topic branches. We plan to work this into our workflow so that we
don't step on each other's toes, and so the fixes branch can be merged
on an as-needed basis.
Summary:
Core:
- runtime PM support for clk providers
- devm API for of_clk_add_hw_provider()
New Drivers:
- Mediatek MT2712 and MT7622
- Renesas R-Car V3M SoC
Updates:
- runtime PM support for Samsung exynos5433/exynos4412 providers
- removal of clkdev aliases on Samsung SoCs
- convert clk-gpio to use gpio descriptors
- various driver cleanups to match kernel coding style
- Amlogic Video Processing Unit VPU and VAPB clks
- sigma-delta modulation for Allwinner audio PLLs
- Allwinner A83t Display clks
- support for the second display unit clock on Renesas RZ/G1E
- suspend/resume support for Renesas R-Car Gen3 CPG/MSSR
- new clock ids for Rockchip rk3188 and rk3368 SoCs
- various 'const' markings on clk_ops structures
- RPM clk support on Qualcomm MSM8996/MSM8660 SoCs"
* tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (137 commits)
clk: stm32h7: fix test of clock config
clk: pxa: fix building on older compilers
clk: sunxi-ng: a83t: Fix i2c buses bits
clk: ti: dra7-atl-clock: fix child-node lookups
clk: qcom: common: fix legacy board-clock registration
clk: uniphier: fix DAPLL2 clock rate of Pro5
clk: uniphier: fix parent of miodmac clock data
clk: hi3798cv200: correct parent mux clock for 'clk_sdio0_ciu'
clk: hisilicon: Delete an error message for a failed memory allocation in hisi_register_clkgate_sep()
clk: hi3660: fix incorrect uart3 clock freqency
clk: kona-setup: Delete error messages for failed memory allocations
ARC: clk: fix spelling mistake: "configurarion" -> "configuration"
clk: cdce925: remove redundant check for non-null parent_name
clk: versatile: Improve sizeof() usage
clk: versatile: Delete error messages for failed memory allocations
clk: ux500: Improve sizeof() usage
clk: ux500: Delete error messages for failed memory allocations
clk: spear: Delete error messages for failed memory allocations
clk: ti: Delete error messages for failed memory allocations
clk: mmp: Adjust checks for NULL pointers
...
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