29 Jan, 2018
3 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 -
The logic in clk_get_by_index() may be useful for other properties
than 'clocks': e.g. 'assigned-clocks' and 'assigned-clock-parents'
follows the same model.This commit refactors clk_get_by_index() by introducing an internal
function clk_get_by_indexed_prop() that allows to specify the name
of the property to process. The original clk_get_by_index() call
is simply directed through this helper function with the property
name fixed to "clocks".Signed-off-by: Philipp Tomsich
Tested-by: David WuSeries-changes: 2
- Fixed David's email address. -
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.
22 Jan, 2018
2 commits
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The clk uclass was converted to support a live device tree recently,
hence the global data pointer declarations are no longer needed.Reviewed-by: Simon Glass
Signed-off-by: Mario Six -
checkpatch.pl complains that the clk_ops structures used in clk-uclass.c
ought to be const, so we mark them as const.Reviewed-by: Simon Glass
Signed-off-by: Mario Six
15 Sep, 2017
2 commits
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We want to support more than one phandle argument. It makes sense to use
an array for this rather than discrete struct members. Adjust the code to
support this. Rename the member to 'arg' instead of 'id'.Signed-off-by: Simon Glass
Tested-by: Kever Yang -
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
01 Jun, 2017
2 commits
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Update the clk uclass to support a live device tree.
Signed-off-by: Simon Glass
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Update the xlate() method to use ofnode_phandle_args instead of the fdtdec
variant. This will allow drivers to support a live device tree.Signed-off-by: Simon Glass
08 Feb, 2017
1 commit
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At present devices use a simple integer offset to record the device tree
node associated with the device. In preparation for supporting a live
device tree, which uses a node pointer instead, refactor existing code to
access this field through an inline function.Signed-off-by: Simon Glass
29 Oct, 2016
1 commit
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In order to make clk->dev available in ops->of_xlate() to get the
clock ID from the 'reg' property of the clock node, assign the
clk->dev before calling ops->of_xlate().Signed-off-by: Wenyou Yang
Acked-by: Stephen Warren
Acked-by: Simon Glass
14 Oct, 2016
1 commit
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These have now landed upstream. The naming is different and in one case the
function signature has changed. Update the code to match.This applies the following upstream commits by
Thierry Reding :604e61e fdt: Add functions to retrieve strings
8702bd1 fdt: Add a function to get the index of a string
2218387 fdt: Add a function to count stringsSigned-off-by: Simon Glass
22 Jul, 2016
1 commit
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Simple version of clk_get_by_index() added by:
"dm: clk: Add a simple version of clk_get_by_index()"
(sha1: a4b10c088c4f6ef2e2bba33e8cfea369bcbbce44)
is only working for #clock-cells= but not for
any other values. Fixed clocks is using #clock-cells=
which requires full implementation.Remove simplified versions of clk_get_by_index() and use full version.
Also remove empty clk_get_by_name() which is failing when it is called
which is useless.Signed-off-by: Michal Simek
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
2 commits
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This function adds quite a bit of code to SPL and we probably don't need
all the features in SPL. Add a simple version (for SPL only) to save space.Signed-off-by: Simon Glass
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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
1 commit
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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
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