29 Jan, 2018
2 commits
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Linux uses the properties 'assigned-clocks', 'assigned-clock-parents'
and 'assigned-clock-rates' to configure the clock subsystem for use
with various peripheral nodes.This implements clk_set_defaults() and hooks it up with the general
device probibin in drivers/core/device.c: when a new device is probed,
clk_set_defaults() will be called for it and will process the
properties mentioned above.Note that this functionality is designed to fail gracefully (i.e. if a
clock-driver does not implement set_parent(), we simply accept this
and ignore the error) as not to break existing board-support.Signed-off-by: Philipp Tomsich
Tested-by: David WuSeries-changes: 2
- Fixed David's email address.Series-version: 2
Cover-letter:
clk: support assigned-clock, assigned-clock-parents, assigned-clock-ratesFor various peripherals on Rockchip SoCs (e.g. for the Ethernet GMAC),
the parent-clock needs to be set via the DTS. This adds the required
plumbing and implements the GMAC case for the RK3399.
END -
Clocks may support multiple parents: this change introduces an
optional operation on the clk-uclass to set a clock's parent.Signed-off-by: Philipp Tomsich
Tested-by: David WuSeries-changes: 2
- Fixed David's email address.
15 Sep, 2017
1 commit
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Rather than naming the phandle struct according to the number of cells it
uses (e.g. struct phandle_2_cell) name it according to the number of
arguments it has (e.g. struct phandle_1_arg). This is a more intuitive
naming.Signed-off-by: Simon Glass
Tested-by: Kever Yang
29 Jul, 2017
2 commits
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Move clk_release_all() prototype and definition inside
OF_CONTROL flag to avoid following compilation error for
poplar platform:aarch64: + poplar
+drivers/usb/host/built-in.o: In function `ehci_usb_remove':
+drivers/usb/host/ehci-generic.c:159: undefined reference to `clk_release_all'
+drivers/usb/host/built-in.o: In function `ehci_usb_probe':
+drivers/usb/host/ehci-generic.c:133: undefined reference to `clk_release_all'
+make[1]: *** [u-boot] Error 139
+make: *** [sub-make] Error 2Introduced by 4e542c4 clk: add clk_release_all()
Signed-off-by: Patrice Chotard
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Add clk_release_all() method which Disable/Free an
array of clocks that has been previously requested by
clk_request/get_by_*()Signed-off-by: Patrice Chotard
Reviewed-by: Simon Glass
08 Oct, 2016
1 commit
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This reverts commit 82f5279b0cd99a9163d34cfe926d0316d9dc0d37.
The build failure of k2*evm boards was fixed in a different way by
the previous commit. It is nasty to patch generic drivers around
with #ifdef CONFIG_CLK just for the KeyStone's matter.Signed-off-by: Masahiro Yamada
Reviewed-by: Simon Glass
Reviewed-by: Tom Rini
24 Sep, 2016
1 commit
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Now, arch/${ARCH}/include/asm/errno.h and include/linux/errno.h have
the same content. (both just wrap )Replace all include directives for with .
Signed-off-by: Masahiro Yamada
[trini: Fixup include/clk.]
Signed-off-by: Tom Rini
23 Sep, 2016
1 commit
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We cannot call on the CONFIG_CLK based clk_get_rate function unless
CONFIG_CLK is set.Signed-off-by: Tom Rini
22 Sep, 2016
1 commit
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Since we return -ENOSYS in some cases we must have
available.Signed-off-by: Tom Rini
21 Sep, 2016
1 commit
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The implementations of clk_get_by_index & clk_get_by_name are only
available when CONFIG_CLK is enabled. Provide the dummies when this is
not the case in order to avoid build failures.Signed-off-by: Paul Burton
Reviewed-by: Simon Glass
16 Aug, 2016
1 commit
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Fix compile warning for non OF_CONTROL builds:
---88---
Signed-off-by: Andreas Bießmann
Acked-by: Stephen Warren
15 Jul, 2016
1 commit
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Add support for this feature in the core clock code.
Signed-off-by: Simon Glass
20 Jun, 2016
1 commit
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The following changes are made to the clock API:
* The concept of "clocks" and "peripheral clocks" are unified; each clock
provider now implements a single set of clocks. This provides a simpler
conceptual interface to clients, and better aligns with device tree
clock bindings.
* Clocks are now identified with a single "struct clk", rather than
requiring clients to store the clock provider device and clock identity
values separately. For simple clock consumers, this isolates clients
from internal details of the clock API.
* clk.h is split so it only contains the client/consumer API, whereas
clk-uclass.h contains the provider API. This aligns with the recently
added reset and mailbox APIs.
* clk_ops .of_xlate(), .request(), and .free() are added so providers
can customize these operations if needed. This also aligns with the
recently added reset and mailbox APIs.
* clk_disable() is added.
* All users of the current clock APIs are updated.
* Sandbox clock tests are updated to exercise clock lookup via DT, and
clock enable/disable.
* rkclk_get_clk() is removed and replaced with standard APIs.Buildman shows no clock-related errors for any board for which buildman
can download a toolchain.test/py passes for sandbox (which invokes the dm clk test amongst
others).Signed-off-by: Stephen Warren
Acked-by: Simon Glass
22 Jan, 2016
1 commit
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Add a method which can locate a clock for a device, given its index. This
uses the normal device tree bindings to return the clock device and the
first argument which is normally used as a peripheral ID in U-Boot.Signed-off-by: Simon Glass
Reviewed-by: Masahiro Yamada
21 Jan, 2016
3 commits
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The most basic thing for clock is to enable it, but it is missing
in this uclass.Signed-off-by: Masahiro Yamada
Acked-by: Simon Glass -
This header uses ulong, so it needs to include .
Likewise, "struct udevice" must be declared before it is used.Signed-off-by: Masahiro Yamada
Acked-by: Simon Glass -
The comment about get_periph_rate() is the same as that of
set_periph_rate().I am fixing typos here and there while I am in this file.
Signed-off-by: Masahiro Yamada
Acked-by: Simon Glass
22 Jul, 2015
1 commit
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Clocks are an important feature of platforms and have become increasing
complex with time. Most modern SoCs have multiple PLLs and dozens of clock
dividers which distribute clocks to on-chip peripherals.Some SoC implementations have a clock API which is private to that SoC family,
e.g. Tegra and Exynos. This is useful but it would be better to have a
common API that can be understood and used throughout U-Boot.Add a simple clock API as a starting point. It supports querying and setting
the rate of a clock. Each clock is a device. To reduce memory and processing
overhead the concept of peripheral clocks is provided. These do not need to
be explicit devices - it is possible to write a driver that can adjust the
I2C clock (for example) without an explicit I2C clock device. This can
dramatically reduce the number of devices (and associated overhead) in a
complex SoC.Clocks are referenced by a number, and it is expected that SoCs will define
that numbering themselves via an enum.Signed-off-by: Simon Glass
04 Feb, 2014
1 commit
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Command provides just dump subcommand for showing clock
frequencies in a soc.Signed-off-by: Michal Simek
Acked-by: Stefano Babic
