summaryrefslogtreecommitdiff
path: root/include/clk.h
AgeCommit message (Collapse)Author
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini
When U-Boot started using SPDX tags we were among the early adopters and there weren't a lot of other examples to borrow from. So we picked the area of the file that usually had a full license text and replaced it with an appropriate SPDX-License-Identifier: entry. Since then, the Linux Kernel has adopted SPDX tags and they place it as the very first line in a file (except where shebangs are used, then it's second line) and with slightly different comment styles than us. In part due to community overlap, in part due to better tag visibility and in part for other minor reasons, switch over to that style. This commit changes all instances where we have a single declared license in the tag as both the before and after are identical in tag contents. There's also a few places where I found we did not have a tag and have introduced one. Signed-off-by: Tom Rini <trini@konsulko.com>
2018-04-10clk: Add get/enable/disable/release for a bulk of clocksNeil Armstrong
This patch adds a "bulk" API to the clock API in order to get/enable/disable /release a group of clocks associated with a device. This bulk API will avoid adding a copy of the same code to manage a group of clocks in drivers. Signed-off-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-01-28clk: implement clk_set_defaults()Philipp Tomsich
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 <philipp.tomsich@theobroma-systems.com> Tested-by: David Wu <david.wu@rock-chips.com> Series-changes: 2 - Fixed David's email address. Series-version: 2 Cover-letter: clk: support assigned-clock, assigned-clock-parents, assigned-clock-rates For 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
2018-01-28clk: add clk_set_parent()Philipp Tomsich
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 <philipp.tomsich@theobroma-systems.com> Tested-by: David Wu <david.wu@rock-chips.com> Series-changes: 2 - Fixed David's email address.
2017-09-15dtoc: Rename the phandle structSimon Glass
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 <sjg@chromium.org> Tested-by: Kever Yang <kever.yang@rock-chips.com>
2017-07-28clk: fix compilation errors for poplar platformPatrice Chotard
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 2 Introduced by 4e542c4 clk: add clk_release_all() Signed-off-by: Patrice Chotard <patrice.chotard@st.com>
2017-07-28clk: add clk_release_all()Patrice Chotard
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 <patrice.chotard@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-10-08Revert "ns16650: Make sure we have CONFIG_CLK set before using infrastructure"Masahiro Yamada
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 <yamada.masahiro@socionext.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Tom Rini <trini@konsulko.com>
2016-09-23treewide: replace #include <asm/errno.h> with <linux/errno.h>Masahiro Yamada
Now, arch/${ARCH}/include/asm/errno.h and include/linux/errno.h have the same content. (both just wrap <asm-generic/errno.h>) Replace all include directives for <asm/errno.h> with <linux/errno.h>. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> [trini: Fixup include/clk.] Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-22ns16650: Make sure we have CONFIG_CLK set before using infrastructureTom Rini
We cannot call on the CONFIG_CLK based clk_get_rate function unless CONFIG_CLK is set. Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-21clk.h: Add <asm/errno.h>Tom Rini
Since we return -ENOSYS in some cases we must have <asm/errno.> available. Signed-off-by: Tom Rini <trini@konsulko.com>
2016-09-21clk: Use dummy clk_get_by_* functions when CONFIG_CLK is disabledPaul Burton
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 <paul.burton@imgtec.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2016-08-15clk.h: inline clk_get_by_name()Andreas Bießmann
Fix compile warning for non OF_CONTROL builds: ---8<--- In file included from /Volumes/devel/u-boot/drivers/gpio/atmel_pio4.c:10:0: /Volumes/devel/u-boot/include/clk.h:107:12: warning: 'clk_get_by_name' defined but not used [-Wunused-function] --->8--- Signed-off-by: Andreas Bießmann <andreas@biessmann.org> Acked-by: Stephen Warren <swarren@nvidia.com>
2016-07-14dm: clk: Add support for of-platdataSimon Glass
Add support for this feature in the core clock code. Signed-off-by: Simon Glass <sjg@chromium.org>
2016-06-19clk: convert API to match reset/mailbox styleStephen Warren
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 <swarren@nvidia.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-01-21dm: clk: Add support for decoding clocks from the device treeSimon Glass
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 <sjg@chromium.org> Reviewed-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2016-01-20clk: add API to enable clockMasahiro Yamada
The most basic thing for clock is to enable it, but it is missing in this uclass. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-01-20clk: add needed include and declaration to include/clk.hMasahiro Yamada
This header uses ulong, so it needs to include <linux/types.h>. Likewise, "struct udevice" must be declared before it is used. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
2016-01-20clk: fix comments in include/clk.hMasahiro Yamada
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 <yamada.masahiro@socionext.com> Acked-by: Simon Glass <sjg@chromium.org>
2015-07-21dm: Add a clock uclassSimon Glass
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 <sjg@chromium.org>
2014-02-04common: Add new clk commandMichal Simek
Command provides just dump subcommand for showing clock frequencies in a soc. Signed-off-by: Michal Simek <michal.simek@xilinx.com> Acked-by: Stefano Babic <sbabic@denx.de>