| Commit message (Collapse) | Author | Age | Files | Lines |
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Add a jump target so that a bit of exception handling can be better reused
at the end of this function.
Signed-off-by: Markus Elfring <elfring@users.sourceforge.net>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/r/01446ce9-c0e8-4467-8b2d-fd736bc5b8e4@web.de
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
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In cases where imx_clk_is_resource_owned() returns false, the code path
does not handle the failure gracefully, potentially leading to a memory
leak. This fix ensures proper cleanup by freeing the allocated memory
for 'clk_node' before returning.
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
Reviewed-by: Peng Fan <peng.fan@nxp.com>
Link: https://lore.kernel.org/all/20231210171907.3410922-1-visitorckw@gmail.com/
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
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Not register clks that not owned to current partition.
CPU resources are specical resources, it is assigned in ATF, not
non-secure OS, but we still need to allow cpu freq, so return
true for non-secure OS for cpu resources.
Otherwise there will be error log if the resources are owned by current
partition:
[ 19.387291] cm40_i2c_div: failed to attached the power domain -2
[ 19.389305] cm40_lpuart_div: failed to attached the power domain -2
Signed-off-by: Peng Fan <peng.fan@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/20230912-imx8-clk-v1-v1-6-69a34bcfcae1@nxp.com
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
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The DT of_device.h and of_platform.h date back to the separate
of_platform_bus_type before it as merged into the regular platform bus.
As part of that merge prepping Arm DT support 13 years ago, they
"temporarily" include each other. They also include platform_device.h
and of.h. As a result, there's a pretty much random mix of those include
files used throughout the tree. In order to detangle these headers and
replace the implicit includes with struct declarations, users need to
explicitly include the correct includes.
Acked-by: Dinh Nguyen <dinguyen@kernel.org>
Acked-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org> # samsung
Acked-by: Heiko Stuebner <heiko@sntech.de> #rockchip
Acked-by: Chanwoo Choi <cw00.choi@samsung.com>
Acked-by: Geert Uytterhoeven <geert+renesas@glider.be>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Luca Ceresoli <luca.ceresoli@bootlin.com> # versaclock5
Signed-off-by: Rob Herring <robh@kernel.org>
Link: https://lore.kernel.org/r/20230718143156.1066339-1-robh@kernel.org
Acked-by: Abel Vesa <abel.vesa@linaro.org> #imx
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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'clk-ti' and 'clk-kasprintf' into clk-next
- Handle allocation failures from kasprintf() and friends
* clk-imx:
clk: imx: clk-imx8mp: improve error handling in imx8mp_clocks_probe()
clk: imx93: fix memory leak and missing unwind goto in imx93_clocks_probe
clk: imx: clk-imx8mn: fix memory leak in imx8mn_clocks_probe
dt-bindings: clock: imx8m: Add missing interrupt property
clk: imx: clk-imxrt1050: fix memory leak in imxrt1050_clocks_probe
clk: imx: composite-8m: Add imx8m_divider_determine_rate
clk: imx: scu: use _safe list iterator to avoid a use after free
clk: imx: drop imx_unregister_clocks
clk: imx6ul: retain early UART clocks during kernel init
clk: imx: imx6sx: Remove CLK_SET_RATE_PARENT from the LDB clocks
* clk-microchip:
dt-bindings: clocks: at91sam9x5-sckc: convert to yaml
dt-bindings: clocks: atmel,at91rm9200-pmc: convert to yaml
clk: microchip: Use of_property_read_bool() for boolean properties
clk: microchip: convert SOC_MICROCHIP_POLARFIRE to ARCH_MICROCHIP_POLARFIRE
* clk-cleanup:
clk: fix typo in clk_hw_register_fixed_rate_parent_data() macro
clk: Fix memory leak in devm_clk_notifier_register()
clk: mvebu: Iterate over possible CPUs instead of DT CPU nodes
clk: mvebu: Use of_get_cpu_hwid() to read CPU ID
MAINTAINERS: Add Marvell mvebu clock drivers
clk: mvebu: Use of_address_to_resource()
clk: tegra: tegra124-emc: Fix potential memory leak
clk: clocking-wizard: Fix Oops in clk_wzrd_register_divider()
clk: bcm: rpi: Fix off by one in raspberrypi_discover_clocks()
clk: sifive: Use devm_platform_ioremap_resource()
* clk-bindings:
dt-bindings: clock: drop unneeded quotes and use absolute /schemas path
dt-bindings: rcc: stm32: Sync with u-boot copy for STM32MP13 SoC
* clk-ti:
clk: keystone: syscon-clk: Add support for audio refclk
dt-bindings: clock: Add binding documentation for TI Audio REFCLK
dt-bindings: clock: ehrpwm: Remove unneeded syscon compatible
clk: keystone: syscon-clk: Allow the clock node to not be of type syscon
* clk-kasprintf:
clk: clocking-wizard: check return value of devm_kasprintf()
clk: ti: clkctrl: check return value of kasprintf()
clk: keystone: sci-clk: check return value of kasprintf()
clk: si5341: free unused memory on probe failure
clk: si5341: check return value of {devm_}kasprintf()
clk: si5341: return error if one synth clock registration fails
clk: cdce925: check return value of kasprintf()
clk: vc5: check memory returned by kasprintf()
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This loop is freeing "clk" so it needs to use list_for_each_entry_safe().
Otherwise it dereferences a freed variable to get the next item on the
loop.
Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
Signed-off-by: Dan Carpenter <dan.carpenter@linaro.org>
Reviewed-by: Abel Vesa <abel.vesa@linaro.org>
Link: https://lore.kernel.org/r/0793fbd1-d2b5-4ec2-9403-3c39343a3e2d@kili.mountain
Signed-off-by: Abel Vesa <abel.vesa@linaro.org>
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The iMX SCU clocks implements a mux with a set_parent hook, but doesn't
provide a determine_rate implementation.
This is a bit odd, since set_parent() is there to, as its name implies,
change the parent of a clock. However, the most likely candidate to
trigger that parent change is a call to clk_set_rate(), with
determine_rate() figuring out which parent is the best suited for a
given rate.
The other trigger would be a call to clk_set_parent(), but it's far less
used, and it doesn't look like there's any obvious user for that clock.
So, the set_parent hook is effectively unused, possibly because of an
oversight. However, it could also be an explicit decision by the
original author to avoid any reparenting but through an explicit call to
clk_set_parent().
The driver does implement round_rate() though, which means that we can
change the rate of the clock, but we will never get to change the
parent.
However, It's hard to tell whether it's been done on purpose or not.
Since we'll start mandating a determine_rate() implementation, let's
convert the round_rate() implementation to a determine_rate(), which
will also make the current behavior explicit. The round_rate()
implementation being shared with other clocks, it's not removed.
And if it was an oversight, the clock behaviour can be adjusted later
on.
Cc: Abel Vesa <abelvesa@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20221018-clk-range-checks-fixes-v4-58-971d5077e7d2@cerno.tech
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The iMX SCU mux clock implements a mux with a set_parent hook, but
doesn't provide a determine_rate implementation.
This is a bit odd, since set_parent() is there to, as its name implies,
change the parent of a clock. However, the most likely candidates to
trigger that parent change are either the assigned-clock-parents device
tree property or a call to clk_set_rate(), with determine_rate()
figuring out which parent is the best suited for a given rate.
The other trigger would be a call to clk_set_parent(), but it's far less
used, and it doesn't look like there's any obvious user for that clock.
Similarly, it doesn't look like the device tree using that clock driver
uses any of the assigned-clock properties on that clock.
So, the set_parent hook is effectively unused, possibly because of an
oversight. However, it could also be an explicit decision by the
original author to avoid any reparenting but through an explicit call to
clk_set_parent().
The latter case would be equivalent to setting the determine_rate
implementation to clk_hw_determine_rate_no_reparent(). Indeed, if no
determine_rate implementation is provided, clk_round_rate() (through
clk_core_round_rate_nolock()) will call itself on the parent if
CLK_SET_RATE_PARENT is set, and will not change the clock rate
otherwise.
And if it was an oversight, then we are at least explicit about our
behavior now and it can be further refined down the line.
Cc: Abel Vesa <abelvesa@kernel.org>
Cc: Fabio Estevam <festevam@gmail.com>
Cc: Peng Fan <peng.fan@nxp.com>
Cc: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: linux-arm-kernel@lists.infradead.org
Cc: NXP Linux Team <linux-imx@nxp.com>
Cc: Pengutronix Kernel Team <kernel@pengutronix.de>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://lore.kernel.org/r/20221018-clk-range-checks-fixes-v4-28-971d5077e7d2@cerno.tech
| Reported-by: kernel test robot <lkp@intel.com>:
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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No error handling is performed when platform_device_add()
fails. Add error processing before return, and modified
the return value.
Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
Signed-off-by: Lin Yujun <linyujun809@huawei.com>
Link: https://lore.kernel.org/r/20220914033206.98046-1-linyujun809@huawei.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core
Pull driver core updates from Greg KH:
"Here is the set of driver core changes for 5.19-rc1.
Lots of tiny driver core changes and cleanups happened this cycle, but
the two major things are:
- firmware_loader reorganization and additions including the ability
to have XZ compressed firmware images and the ability for userspace
to initiate the firmware load when it needs to, instead of being
always initiated by the kernel. FPGA devices specifically want this
ability to have their firmware changed over the lifetime of the
system boot, and this allows them to work without having to come up
with yet-another-custom-uapi interface for loading firmware for
them.
- physical location support added to sysfs so that devices that know
this information, can tell userspace where they are located in a
common way. Some ACPI devices already support this today, and more
bus types should support this in the future.
Smaller changes include:
- driver_override api cleanups and fixes
- error path cleanups and fixes
- get_abi script fixes
- deferred probe timeout changes.
It's that last change that I'm the most worried about. It has been
reported to cause boot problems for a number of systems, and I have a
tested patch series that resolves this issue. But I didn't get it
merged into my tree before 5.18-final came out, so it has not gotten
any linux-next testing.
I'll send the fixup patches (there are 2) as a follow-on series to this
pull request.
All have been tested in linux-next for weeks, with no reported issues
other than the above-mentioned boot time-outs"
* tag 'driver-core-5.19-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (55 commits)
driver core: fix deadlock in __device_attach
kernfs: Separate kernfs_pr_cont_buf and rename_lock.
topology: Remove unused cpu_cluster_mask()
driver core: Extend deferred probe timeout on driver registration
MAINTAINERS: add Russ Weight as a firmware loader maintainer
driver: base: fix UAF when driver_attach failed
test_firmware: fix end of loop test in upload_read_show()
driver core: location: Add "back" as a possible output for panel
driver core: location: Free struct acpi_pld_info *pld
driver core: Add "*" wildcard support to driver_async_probe cmdline param
driver core: location: Check for allocations failure
arch_topology: Trace the update thermal pressure
kernfs: Rename kernfs_put_open_node to kernfs_unlink_open_file.
export: fix string handling of namespace in EXPORT_SYMBOL_NS
rpmsg: use local 'dev' variable
rpmsg: Fix calling device_lock() on non-initialized device
firmware_loader: describe 'module' parameter of firmware_upload_register()
firmware_loader: Move definitions from sysfs_upload.h to sysfs.h
firmware_loader: Fix configs for sysfs split
selftests: firmware: Add firmware upload selftests
...
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The driver_override field from platform driver should not be initialized
from static memory (string literal) because the core later kfree() it,
for example when driver_override is set via sysfs.
Use dedicated helper to set driver_override properly.
Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Krzysztof Kozlowski <krzysztof.kozlowski@linaro.org>
Link: https://lore.kernel.org/r/20220419113435.246203-10-krzysztof.kozlowski@linaro.org
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
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If the device is already in a runtime PM enabled state
pm_runtime_get_sync() will return 1.
Also, we need to call pm_runtime_put_noidle() when pm_runtime_get_sync()
fails, so use pm_runtime_resume_and_get() instead. this function
will handle this.
Fixes: 78edeb080330 ("clk: imx: scu: add runtime pm support")
Signed-off-by: Miaoqian Lin <linmq006@gmail.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Link: https://lore.kernel.org/r/20220425011117.25093-1-linmq006@gmail.com
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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In __imx_clk_gpr_scu(), if imx_scu_clk_is_valid(rsrc_id) fails, then
`clk_node` which is allocated by kzalloc() is not properly released,
which may lead to memory leak.
So this patch added kfree(clk_node) on the above error path before
return ERR_PTR(-EINVAL).
Signed-off-by: Xiaoke Wang <xkernel.wang@foxmail.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Link: https://lore.kernel.org/r/tencent_27FF59903EE6AB5C0D0E6D0A8E7059A59007@qq.com
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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Since CPU clocks are managed by CPUFREQ and ATF, do not enable
runtime PM otherwise rpm gets out of status as cpufreq
also manages clock states.
Signed-off-by: Nitin Garg <nitin.garg@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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Add clock parent save and restore.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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Display sub-system has special clock settings in SCFW, the
bypassed clock is used instead of PLL in Linux kernel clock
tree, so when saving clock rate, need to save non-cached clock
rate for Display sub-system's bypass clocks, and other clocks
still use the cached clock rate which is with runtime PM ON.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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Add A72 clock to support cpufreq on A72 cluster.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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Add i.MX8QM cpufreq support for A53 cluster.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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PI PLL does not support enable/disable. So bypass it's
enable status restore.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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detach pd if can't power up as it may be allocated to a differet
partition.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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CPU clock is managed by ATF. No need save and restore.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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Because digital pll for parallel interface is on by default, and
not provide enable/disable function by scu, so add the related ops
for this kind of clocks.
Signed-off-by: Guoniu.zhou <guoniu.zhou@nxp.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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clk-imx8qxp is a common SCU clock driver used by both QM and QXP
platforms. The clock numbers vary a bit between those two platforms.
This patch introduces a mechanism to only register the valid clocks
for one platform by checking the clk resource id table.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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SCU clock protocol supports a few clocks based on GPR controller
registers including mux/divider/gate.
Add a generic clock register API to support them all.
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Abel Vesa <abel.vesa@nxp.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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When register failed, clk will be freed, it will generate dangling pointer
problem in later reference. it should return directly.
Signed-off-by: Jian Dong <dongjian@yulong.com>
Signed-off-by: Abel Vesa <abel.vesa@nxp.com>
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The device_is_bound() is invisible to drivers when built as modules.
It's also not aimed to be used by drivers according to Greg K.H.
Let's remove it from clk-scu driver and find another way to do proper
driver loading sequence.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Stephen Boyd <sboyd@kernel.org>
Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
Reported-by: Sudip Mukherjee <sudipm.mukherjee@gmail.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Fix the following sparse warning:
./clk-scu.c:23:20: warning: symbol 'pd_np' was not declared. Should it be static?
Reported-by: Hulk Robot <hulkci@huawei.com>
Signed-off-by: Zou Wei <zou_wei@huawei.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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After commit e0d0d4d86c76 ("clk: imx8qxp: Support building i.MX8QXP clock
driver as module"), clk-scu.c and clk-imx8qxp.c are complied in one module,
thus there can be only one module_init() in those two files.
Commit 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
introduced another module_init() in clk_scu.c which caused the errors
below.
To fix the issue, we can remove the unnecessary builtin_platform_driver
from clk_scu.c and directly register the driver in imx_clk_scu_init().
CC [M] drivers/clk/imx/clk-scu.o
In file included from ../include/linux/of_device.h:6,
from ../include/linux/of_platform.h:12,
from ../drivers/clk/imx/clk-scu.c:11:
../drivers/clk/imx/clk-scu.c: In function ‘imx_clk_scu_init’:
../drivers/clk/imx/clk-scu.c:176:35: error: ‘imx_clk_scu_driver’ undeclared (first use in this function); did you mean ‘imx_clk_scu_init’?
176 | return platform_driver_register(&imx_clk_scu_driver);
| ^~~~~~~~~~~~~~~~~~
../include/linux/platform_device.h:218:29: note: in definition of macro ‘platform_driver_register’
218 | __platform_driver_register(drv, THIS_MODULE)
| ^~~
../drivers/clk/imx/clk-scu.c:176:35: note: each undeclared identifier is reported only once for each function it appears in
176 | return platform_driver_register(&imx_clk_scu_driver);
| ^~~~~~~~~~~~~~~~~~
../include/linux/platform_device.h:218:29: note: in definition of macro ‘platform_driver_register’
218 | __platform_driver_register(drv, THIS_MODULE)
| ^~~
../drivers/clk/imx/clk-scu.c:177:1: error: control reaches end of non-void function [-Werror=return-type]
177 | }
| ^
At top level:
../drivers/clk/imx/clk-scu.c:470:31: warning: ‘imx_clk_scu_driver’ defined but not used [-Wunused-variable]
470 | static struct platform_driver imx_clk_scu_driver = {
Reported-by: kernel test robot <lkp@intel.com>
Fixes: 77d8f3068c63 ("clk: imx: scu: add two cells binding support")
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Acked-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Clock state will be lost when its power domain is completely off
during system suspend/resume. So we save and restore the state
accordingly in suspend/resume callback.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Michael Turquette <mturquette@baylibre.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Add runtime pm support
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Michael Turquette <mturquette@baylibre.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Used to support runtime pm.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Michael Turquette <mturquette@baylibre.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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Bypass cpu power domains which are owned by ATF.
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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This patch implements the new two cells binding for SCU clocks.
The usage is as follows:
clocks = <&uart0_clk IMX_SC_R_UART_0 IMX_SC_PM_CLK_PER>
Due to each SCU clock is associated with a power domain, without power
on the domain, the SCU clock can't work. So we create platform devices
for each domain clock respectively and manually attach the required domain
before register the clock devices, then we can register clocks in the
clock platform driver accordingly.
Note because we do not have power domain info in device tree and the SCU
resource ID is the same for power domain and clock, so we use resource ID
to find power domains.
Later, we will also use this clock platform driver to support suspend/resume
and runtime pm.
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Signed-off-by: Shawn Guo <shawnguo@kernel.org>
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The imx SC api strongly assumes that messages are composed out of
4-bytes words but some of our message structs have odd sizeofs.
This produces many oopses with CONFIG_KASAN=y.
Fix by marking with __aligned(4).
Fixes: 666aed2d13ee ("clk: imx: scu: add set parent support")
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Link: https://lkml.kernel.org/r/aad021e432b3062c142973d09b766656eec18fde.1582216144.git.leonard.crestez@nxp.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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The imx SC api strongly assumes that messages are composed out of
4-bytes words but some of our message structs have odd sizeofs.
This produces many oopses with CONFIG_KASAN=y.
Fix by marking with __aligned(4).
Fixes: fe37b4820417 ("clk: imx: add scu clock common part")
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Link: https://lkml.kernel.org/r/10e97a04980d933b2cfecb6b124bf9046b6e4f16.1582216144.git.leonard.crestez@nxp.com
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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On NXP's i.MX SoCs with system controller inside, CPU frequency
scaling can ONLY be done by system controller firmware, and it
can ONLY be requested from secure mode, so Linux kernel has to
call ARM SMC to trap to ARM-Trusted-Firmware to request system
controller firmware to do CPU frequency scaling.
This patch adds i.MX system controller CPU frequency scaling support,
it reuses cpufreq-dt driver and implement the CPU frequency scaling
inside SCU clock driver.
Signed-off-by: Anson Huang <Anson.Huang@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add clk scu set parents support.
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
[sboyd@kernel.org: Remove le32_to_cpu() on get_parent op]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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Add SCU clock common part which will be used by client clock drivers.
SCU clocks are totally different from the legacy clocks (No much
legacy things can be reused), it's using a firmware interface now based
on SCU protocol. So a new configuration option CONFIG_MXC_CLK_SCU is added.
Cc: Shawn Guo <shawnguo@kernel.org>
Cc: Sascha Hauer <kernel@pengutronix.de>
Cc: Fabio Estevam <fabio.estevam@nxp.com>
Cc: Stephen Boyd <sboyd@kernel.org>
Cc: Michael Turquette <mturquette@baylibre.com>
Signed-off-by: Dong Aisheng <aisheng.dong@nxp.com>
[sboyd@kernel.org: Mark ccm_ipc_handle static]
Signed-off-by: Stephen Boyd <sboyd@kernel.org>
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