summaryrefslogtreecommitdiff
path: root/include/clk.h
AgeCommit message (Collapse)AuthorFilesLines
2024-08-01clk: Revise help text for clk_get_parent_rate()Alexander Dahl1-1/+1
The function returns the rate of the parent clock, the previous text made no sense at all. Fixes: 4aa78300a025 ("dm: clk: Define clk_get_parent_rate() for clk operations") Signed-off-by: Alexander Dahl <ada@thorsis.com> Reviewed-by: Sean Anderson <seanga2@gmail.com>
2024-01-29treewide: Remove clk_freeSean Anderson1-21/+0
This function is a no-op. Remove it. Signed-off-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20231216193843.2463779-3-seanga2@gmail.com
2024-01-29clk: Remove rfreeSean Anderson1-14/+4
Nothing uses this function. Remove it. Since clk_free no longer does anything, just stub it out. Signed-off-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20231216193843.2463779-2-seanga2@gmail.com
2023-12-15cmd: clk: Make soc_clk_dump staticIgor Prusov1-2/+0
After introducing dump to clk_ops there is no need to override or expose this symbol anymore. Reviewed-by: Patrice Chotard <patrice.chotard@foss.st.com> Tested-by: Patrice Chotard <patrice.chotard@foss.st.com> Reviewed-by: Sean Anderson <seanga2@gmail.com> Signed-off-by: Igor Prusov <ivprusov@sberdevices.ru> Link: https://lore.kernel.org/r/20231109105516.24892-9-ivprusov@sberdevices.ru
2023-11-01clk: also handle ENOENT in *_optional functionsYang Xiwen1-3/+5
If the device does not specify any clocks in device tree, these functions will return PTR_ERR(-ENOENT). This is not the intended behavior and does not comply with linux kernel CCF. Fix that by returning NULL under such circumstances instead. Signed-off-by: Yang Xiwen <forbidden405@outlook.com> Reviewed-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20230818-clk-fix-v1-3-49ec18f820bf@outlook.com
2023-11-01clk: fix count parameter type for clk_release_allEugen Hristev1-2/+2
The second parameter for clk_release_all is used as an unsigned (which makes sense) but the function prototype declares it as an int. This causes warnings/error like such below: include/clk.h:422:48: error: conversion to ‘int’ from ‘unsigned int’ may change the sign of the result [-Werror=sign-conversion] 422 | return clk_release_all(bulk->clks, bulk->count); To fix this, changed the type of the count to `unsigned int` Fixes: 82a8a669b4f7 ("clk: add clk_release_all()") Signed-off-by: Eugen Hristev <eugen.hristev@collabora.com> Reviewed-by: Xavier Drudis Ferran <xdrudis@tinet.cat> Reviewed-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20230619104752.278500-1-eugen.hristev@collabora.com
2023-02-12clk: Allow clk_get_by_name() with NULL nameSamuel Holland1-2/+2
This allows devm_clock_get(dev, NULL) to work and get the first clock, which is common in code ported from Linux. Signed-off-by: Samuel Holland <samuel@sholland.org> Reviewed-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Link: https://lore.kernel.org/r/20230122000252.53642-1-samuel@sholland.org
2022-10-20Merge tag 'clk-2023.01' of https://source.denx.de/u-boot/custodians/u-boot-clkTom Rini1-2/+2
Clock patches for 2023.01 This contains various fixes (some long overdue) for the next release.
2022-10-19clk: change return type of clk_get_parent_rate from long long to ulongMichal Suchanek1-2/+2
All functions getting and setting clock rate use ulong for rate, only clk_get_parent_rate is an exception. Change the return value to match other clock rate funcrions. Most users directly assign the rate to unsigned long anyway, and the few users that use u64 (not s64) multiply the rate so they may need the extra bits for the result in their use case. Fixes: 4aa78300a0 ("dm: clk: Define clk_get_parent_rate() for clk operations") Signed-off-by: Michal Suchanek <msuchanek@suse.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20220928103757.11870-1-msuchanek@suse.de
2022-10-09dm: clk: add missing stub when CONFIG_CLK is deactivatedDario Binacchi1-1/+31
Add missing stub for functions [devm_]clk_...() when CONFIG_CLK is deactivated. Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com> Reviewed-by: Sean Anderson <seanga2@gmail.com>
2022-03-30clk: Make clk_free return voidSean Anderson1-4/+4
Most callers of this function do not check the return value, and it is unclear what action they should take if it fails. If a function is freeing multiple clocks, it should not stop just because the first one failed. Since the callbacks can no longer fail, just convert the return type to void. Signed-off-by: Sean Anderson <seanga2@gmail.com> Link: https://lore.kernel.org/r/20220115222504.617013-8-seanga2@gmail.com
2022-02-25clk: Add clk_get_by_name_optionalSean Anderson1-0/+24
This adds a helper function for clk_get_by_name in cases where the clock is optional. Hopefully this helps point driver writers in the right direction. Also convert some existing users. Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Simon Glass <sjg@chromium.org> Link: https://lore.kernel.org/r/20220115205247.566210-2-seanga2@gmail.com
2022-02-25clk: Add client API to HTML docsSean Anderson1-91/+85
This converts the existing client (aka clk.h) documentation to kernel doc format, and adds it to the HTML docs. I have tried to preserve existing comments as much as possible, refraining from semantic changes. Signed-off-by: Sean Anderson <seanga2@gmail.com> Tested-by: Heinrich Schuchardt <xypron.glpk@gmx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Link: https://lore.kernel.org/r/20211222171114.3091780-4-seanga2@gmail.com [rebased onto u-boot/master and resolved conflicts] Signed-off-by: Sean Anderson <seanga2@gmail.com>
2022-02-24clk: Inline clk_get_*_optionalSean Anderson1-22/+34
The optional varients of clk_get_* functions are just simple wrappers. Reduce code size a bit by inlining them. On platforms where it is not used (most of them), it will not be compiled in any more. On platforms where they are used, the inlined branch should not cause any significant growth. Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Link: https://lore.kernel.org/r/20211222171114.3091780-3-seanga2@gmail.com
2022-02-24clk: Rename clk_get_optional_nodevSean Anderson1-3/+4
This normalizes the name of this accessor function to put "_optional" last. Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org> Link: https://lore.kernel.org/r/20211222171114.3091780-2-seanga2@gmail.com
2022-01-19doc: replace @return by Return:Heinrich Schuchardt1-23/+23
Sphinx expects Return: and not @return to indicate a return value. find . -name '*.c' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; find . -name '*.h' -exec \ sed -i 's/^\(\s\)\*\(\s*\)@return\(\s\)/\1*\2Return:\3/' {} \; Signed-off-by: Heinrich Schuchardt <heinrich.schuchardt@canonical.com>
2021-12-15clk: fix clk_get_rate() documentationGiulio Benetti1-1/+2
Improve clk_get_rate() @return documentation that otherwise is a bit ambiguous. At the moment I expect to return 0 as error since the return type is 'ulong', instead the function really returns negative value in case the corresponding function pointer is null and returns 0 if the clock is invalid. Signed-off-by: Giulio Benetti <giulio.benetti@benettiengineering.com> Reviewed-by: Sean Anderson <seanga2@gmail.com>
2021-09-25clk: Rename clk_get_by_driver_info()Simon Glass1-3/+28
This is actually a misnomer now, since the phandle info may contain a driver_info index or a udevice index. Rename it to use the word 'phandle', which seems more accurate. Add a comment while we are here. Also add a test for this function. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-09-25treewide: Simply conditions with the new OF_REALSimon Glass1-3/+1
Use this new Kconfig to simplify the compilation conditions where appropriate. Signed-off-by: Simon Glass <sjg@chromium.org>
2021-06-17clk: Allow force setting clock defaults before relocationSean Anderson1-4/+26
Since 291da96b8e ("clk: Allow clock defaults to be set during re-reloc state for SPL only") it has been impossible to set clock defaults before relocation. This is annoying on boards without SPL, since there is no way to set clock defaults before U-Boot proper. In particular, the aisram rate must be changed before relocation on the K210, since U-Boot will hang if we try and change the rate while we are using aisram. To get around this, extend the stage parameter to allow force setting defaults, even if they would be otherwise postponed for later. A device tree property was decided against because of the concerns in the original commit thread about the overhead of repeatedly parsing the device tree. Signed-off-by: Sean Anderson <seanga2@gmail.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2021-01-12clk: add clk_round_rate()Dario Binacchi1-0/+28
It returns the rate which will be set if you ask clk_set_rate() to set that rate. It provides a way to query exactly what rate you'll get if you call clk_set_rate() with that same argument. So essentially, clk_round_rate() and clk_set_rate() are equivalent except the former does not modify the clock hardware in any way. Signed-off-by: Dario Binacchi <dariobin@libero.it> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Sean Anderson <seanga2@gmail.com>
2020-07-09dtoc: extend dtoc to use struct driver_info when linking nodesWalter Lozano1-2/+2
In the current implementation, when dtoc parses a dtb to generate a struct platdata it converts the information related to linked nodes as pointers to struct platdata of destination nodes. By doing this, it makes difficult to get pointer to udevices created based on these information. This patch extends dtoc to use struct driver_info when populating information about linked nodes, which makes it easier to later get the devices created. In this context, reimplement functions like clk_get_by_index_platdata() which made use of the previous approach. Signed-off-by: Walter Lozano <walter.lozano@collabora.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-05-11clk: Fix clk func names in commentsJagan Teki1-6/+6
clk function names in comments should be prefix with clk instead of clock. Fix it. Cc: Simon Glass <sjg@chromium.org> Cc: Tom Rini <trini@konsulko.com> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2020-04-28dm: clk: add stub when CONFIG_CLK is deactivatedPatrick Delaunay1-13/+89
Add stub for functions clk_...() when CONFIG_CLK is deactivated. This patch avoids compilation issues for driver using these API without protection (#if CONFIG_IS_ENABLED(CLK)) For example, before this patch we have undefined reference to `clk_disable_bulk') for code: clk_disable_bulk(&priv->clks); clk_release_bulk(&priv->clks); Signed-off-by: Patrick Delaunay <patrick.delaunay@st.com>
2020-01-16clk: add APIs to get (optional) clock by name without a deviceChunfeng Yun1-0/+40
Sometimes we may need get (optional) clock without a device, that means use ofnode. e.g. when the phy node has subnode, and there is no device created for subnode, in this case, we need these new APIs to get subnode's clock. Signed-off-by: Chunfeng Yun <chunfeng.yun@mediatek.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Ryder Lee <ryder.lee@mediatek.com>
2019-10-22drivers: clk: Fix using assigned-clocks in the node of the clock it sets upJean-Jacques Hiblot1-2/+5
This fixes the case where assigned-clocks is used to define a clock defaults inside this same clock's node. This is used sometimes to setup a default parents and/or rate for a clock. example: muxed_clock: muxed_clock { clocks = <&clk_provider 0>, <&clk_provider 1>; #clock-cells = <0>; assigned-clocks = <&muxed_clock>; assigned-clock-parents = <&clk_provider 1>; }; It doesn't work in u-boot because the assigned-clocks are setup *before* the clock is probed. (clk_set_parent() will likely crash or fail if called before the device probe function) Making it work by handling "assigned-clocks" in 2 steps: first before the clk device is probed, and then after the clk device is probed. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2019-10-22drivers: clk: Add a managed API to get clocks from the device-treeJean-Jacques Hiblot1-0/+47
Add devm_clk_get(), devm_clk_get_optional() to get clocks from the device-tree. The clocks is automatically released and the data structure freed when the device is unbound. Also add devm_clk_put() to release the clock and free the data structure manually. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2019-10-22drivers: clk: Handle gracefully NULL pointersJean-Jacques Hiblot1-1/+1
Prepare the way for a managed CLK API by handling NULL pointers without crashing nor failing. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
2019-08-22clk: introduce enable_countPeng Fan1-0/+1
As what Linux Kernel 5.3.0 provides when enable/disable clk, there is an enable_count in clk_core_disable/enable. Introduce enable_count to track the clk enable/disable count when clk_enable/disable for CCF. And Initialize enable_count to 0 when register the clk. And clk tree dump with enable_count will be supported, it will be easy for us to check the clk status with enable_count Signed-off-by: Peng Fan <peng.fan@nxp.com>
2019-08-12clk: add support for clk_is_match()Sekhar Nori1-0/+12
Add support for clk_is_match() which is required to know if two clock pointers point to the same exact physical clock. Also add a unit test for the new API. Reviewed-by: Lokesh Vutla <lokeshvutla@ti.com> Signed-off-by: Sekhar Nori <nsekhar@ti.com>
2019-07-31clk: introduce clk_dev_bindedPeng Fan1-0/+9
When support Clock Common Framework, U-Boot use dev for clk tree information, there is no clk->parent. When support composite clk, it contains mux/gate/divider, but the mux/gate/divider is not binded with device. So we could not use dev_get_uclass_priv to get the correct clk_mux/gate/divider. So add clk_dev_binded to let choose the correct method. Signed-off-by: Peng Fan <peng.fan@nxp.com>
2019-07-19dm: clk: Define clk_get_by_id() for clk operationsLukasz Majewski1-0/+11
This commit adds the clk_get_by_id() function, which is responsible for getting the udevice with matching clk->id. Such approach allows re-usage of inherit DM list relationship for the same class (UCLASS_CLK). As a result - we don't need any other external list - it is just enough to look for UCLASS_CLK related udevices. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Peng Fan <peng.fan@nxp.com>
2019-07-19dm: clk: Define clk_get_parent_rate() for clk operationsLukasz Majewski1-0/+9
This commit adds the clk_get_parent_rate() function, which is responsible for getting the rate of parent clock. Unfortunately, u-boot's DM support for getting parent is different (the parent relationship is in udevice) than the one in Common Clock Framework [CCF] in Linux. To alleviate this problem - the clk_get_parent_rate() function has been introduced to clk-uclass.c. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Peng Fan <peng.fan@nxp.com>
2019-07-19dm: clk: Define clk_get_parent() for clk operationsLukasz Majewski1-0/+9
This commit adds the clk_get_parent() function, which is responsible for getting the parent's struct clock pointer. U-Boot's DM support for getting parent is different (the parent relationship is in udevice) than the one in Common Clock Framework [CCF] in Linux. To obtain the pointer to struct clk of parent the pdev->uclass_priv field is read via dev_get_clk_ptr() wrapper. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Peng Fan <peng.fan@nxp.com>
2019-07-19clk: Extend struct clk to provide clock type agnostic flagsLukasz Majewski1-0/+4
This commit extends the struct clk to provide information regarding the flags related to this devices. Those flags are clk device agnostic and indicate generic features (like e.g. CLK_GET_RATE_NOCACHE - the need to always recalculate the rate). Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Peng Fan <peng.fan@nxp.com>
2019-07-19clk: Extend struct clk to provide information regarding clock rateLukasz Majewski1-0/+2
This commit extends the struct clk to provide information regarding the clock rate. As a result the clock tree traversal is performed at most once, and further reads are using the cached value. Signed-off-by: Lukasz Majewski <lukma@denx.de>
2019-07-19dm: Fix documentation entry as there is no UCLASS_CLOCK uclassLukasz Majewski1-1/+1
There is no UCLASS_CLOCK uclass defined. Instead we do use the UCLASS_CLK. Signed-off-by: Lukasz Majewski <lukma@denx.de> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Peng Fan <peng.fan@nxp.com>
2019-05-09clk: Get the CLK by index without deviceJagan Teki1-0/+15
Getting a CLK by index with device is not straight forward for some use-cases like handling clock operations for child node in parent driver. So we need to process the child node in parent probe via ofnode and process CLK operation for child without udevice but with ofnode. So add clk_get_by_index_nodev() and move the common code in clk_get_by_index_tail() to use for clk_get_by_index() Cc: Stephen Warren <swarren@nvidia.com> Signed-off-by: Jagan Teki <jagan@amarulasolutions.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-09-29include/clk.h: Fix the name of the clock uclass in commentLiviu Dudau1-1/+1
The comment references a structure name that doesn't exist. Use the name of the actual uclass. Signed-off-by: Liviu Dudau <liviu.dudau@foss.arm.com> Reviewed-by: Simon Glass <sjg@chromium.org> Reviewed-by: Heiko Schocher <hs@denx.de> Drop period at end of commit subject: Signed-off-by: Simon Glass <sjg@chromium.org>
2018-09-11clk: Extend clock control with an optional data fieldAndreas Dannenberg1-5/+7
Some systems require more than a single ID to identify and configure any clock provider. For those scenarios add an optional data field to the clock control structure. Reviewed-by: Tom Rini <trini@konsulko.com> Signed-off-by: Andreas Dannenberg <dannenberg@ti.com> Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com>
2018-08-03clk: add clk_valid()Fabrice Gasnier1-0/+10
Add clk_valid() to check for optional clocks are valid. Call clk_valid() in test/dm/clk.c and add relevant test routine to sandbox clk tests. Signed-off-by: Fabrice Gasnier <fabrice.gasnier@st.com> Reviewed-by: Simon Glass <sjg@chromium.org>
2018-05-07SPDX: Convert all of our single license tags to Linux Kernel styleTom Rini1-2/+1
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 Armstrong1-1/+71
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 Tomsich1-0/+17
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 Tomsich1-0/+11
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 Glass1-2/+2
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 Chotard1-14/+21
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 Chotard1-0/+14
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 Yamada1-12/+13
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 Yamada1-1/+1
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>
generated by cgit v1.2.3 (git 2.25.1) at 2024-11-24 10:09:08 +0000