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path: root/drivers/clk/keystone
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2021-06-22clk: keystone: syscon-clk: Add support for AM64 specific epwm-tbclkLokesh Vutla
AM64 has 9 instances of EPWM modules. And each instance has a clk to Timer-Base sub-module that can be controlled by Control module. Update the driver with all the 9 instance of clocks associated to ti,am64-epwm-tbclk. Signed-off-by: Lokesh Vutla <lokeshvutla@ti.com> Link: https://lore.kernel.org/r/20210528045743.16537-3-lokeshvutla@ti.com Reviewed-by: Tero Kristo <kristo@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2021-04-08treewide: Change list_sort to use const pointersSami Tolvanen
list_sort() internally casts the comparison function passed to it to a different type with constant struct list_head pointers, and uses this pointer to call the functions, which trips indirect call Control-Flow Integrity (CFI) checking. Instead of removing the consts, this change defines the list_cmp_func_t type and changes the comparison function types of all list_sort() callers to use const pointers, thus avoiding type mismatches. Suggested-by: Nick Desaulniers <ndesaulniers@google.com> Signed-off-by: Sami Tolvanen <samitolvanen@google.com> Reviewed-by: Nick Desaulniers <ndesaulniers@google.com> Reviewed-by: Christoph Hellwig <hch@lst.de> Reviewed-by: Kees Cook <keescook@chromium.org> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20210408182843.1754385-10-samitolvanen@google.com
2020-09-22clk: keystone: sci-clk: add 10% slack to set_rateTero Kristo
Currently, we request exact clock rates from the firmware to be set with set_rate. Due to some rounding errors and internal functionality of the firmware itself, this can fail. Thus, add some slack to the set_rate functionality so that we are always guaranteed to pass. The firmware always attempts to use frequency as close to the target freq as possible despite the slack given here. Signed-off-by: Tero Kristo <t-kristo@ti.com> Link: https://lore.kernel.org/r/20200907085740.1083-4-t-kristo@ti.com Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-09-22clk: keystone: sci-clk: cache results of last query rate operationTero Kristo
Cache results of the latest query rate operation. This optimizes the firmware interface a bit, avoiding unnecessary calls to firmware if we know the result already; the firmware interface is pretty expensive to use for query rate functionality. Signed-off-by: Tero Kristo <t-kristo@ti.com> Link: https://lore.kernel.org/r/20200907085740.1083-3-t-kristo@ti.com Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-09-22clk: keystone: sci-clk: fix parsing assigned-clock data during probeTero Kristo
The DT clock probe loop incorrectly terminates after processing "clocks" only, fix this by re-starting the loop when all entries for current DT property have been parsed. Fixes: 8e48b33f9def ("clk: keystone: sci-clk: probe clocks from DT instead of firmware") Reported-by: Peter Ujfalusi <peter.ujfalusi@ti.com> Signed-off-by: Tero Kristo <t-kristo@ti.com> Link: https://lore.kernel.org/r/20200907085740.1083-2-t-kristo@ti.com Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-07-10Replace HTTP links with HTTPS ones: Common CLK frameworkAlexander A. Klimov
Rationale: Reduces attack surface on kernel devs opening the links for MITM as HTTPS traffic is much harder to manipulate. Deterministic algorithm: For each file: If not .svg: For each line: If doesn't contain `\bxmlns\b`: For each link, `\bhttp://[^# \t\r\n]*(?:\w|/)`: If both the HTTP and HTTPS versions return 200 OK and serve the same content: Replace HTTP with HTTPS. Signed-off-by: Alexander A. Klimov <grandmaster@al2klimov.de> Link: https://lore.kernel.org/r/20200703175114.15027-1-grandmaster@al2klimov.de Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-06-14treewide: replace '---help---' in Kconfig files with 'help'Masahiro Yamada
Since commit 84af7a6194e4 ("checkpatch: kconfig: prefer 'help' over '---help---'"), the number of '---help---' has been gradually decreasing, but there are still more than 2400 instances. This commit finishes the conversion. While I touched the lines, I also fixed the indentation. There are a variety of indentation styles found. a) 4 spaces + '---help---' b) 7 spaces + '---help---' c) 8 spaces + '---help---' d) 1 space + 1 tab + '---help---' e) 1 tab + '---help---' (correct indentation) f) 1 tab + 1 space + '---help---' g) 1 tab + 2 spaces + '---help---' In order to convert all of them to 1 tab + 'help', I ran the following commend: $ find . -name 'Kconfig*' | xargs sed -i 's/^[[:space:]]*---help---/\thelp/' Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
2020-03-20clk: keystone: Add new driver to handle syscon based clocksVignesh Raghavendra
On TI's AM654/J721e SoCs, certain clocks can be gated/ungated by setting a single bit in SoC's System Control Module registers. Sometime more than one clock control can be in the same register. Add a driver to support such clocks using syscon framework. Driver currently supports controlling EHRPWM's TimeBase clock(TBCLK) for AM654 SoC. Signed-off-by: Vignesh Raghavendra <vigneshr@ti.com> Link: https://lkml.kernel.org/r/20200227053529.16479-3-vigneshr@ti.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-07-17Merge tag 'clk-for-linus' of ↵Linus Torvalds
git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux Pull clk updates from Stephen Boyd: "This round of clk driver and framework updates is heavy on the driver update side. The two main highlights in the core framework are the addition of an bulk clk_get API that handles optional clks and an extra debugfs file that tells the developer about the current parent of a clk. The driver updates are dominated by i.MX in the diffstat, but that is mostly because that SoC has started converting to the clk_hw style of clk registration. The next big update is in the Amlogic meson clk driver that gained some support for audio, cpu, and temperature clks while fixing some PLL issues. Finally, the biggest thing that stands out is the conversion of a large part of the Allwinner sunxi-ng driver to the new clk parent scheme that uses less strings and more pointer comparisons to match clk parents and children up. In general, it looks like we have a lot of little fixes and tweaks here and there to clk data along with the normal addition of a handful of new drivers and a couple new core framework features. Core: - Add a 'clk_parent' file in clk debugfs - Add a clk_bulk_get_optional() API (with devm too) New Drivers: - Support gated clk controller on MIPS based BCM63XX SoCs - Support SiLabs Si5341 and Si5340 chips - Support for CPU clks on Raspberry Pi devices - Audsys clock driver for MediaTek MT8516 SoCs Updates: - Convert a large portion of the Allwinner sunxi-ng driver to new clk parent scheme - Small frequency support for SiLabs Si544 chips - Slow clk support for AT91 SAM9X60 SoCs - Remove dead code in various clk drivers (-Wunused) - Support for Marvell 98DX1135 SoCs - Get duty cycle of generic pwm clks - Improvement in mmc phase calculation and cleanup of some rate defintions - Switch i.MX6 and i.MX7 clock drivers to clk_hw based APIs - Add GPIO, SNVS and GIC clocks for i.MX8 drivers - Mark imx6sx/ul/ull/sll MMDC_P1_IPG and imx8mm DRAM_APB as critical clock - Correct imx7ulp nic1_bus_clk and imx8mm audio_pll2_clk clock setting - Add clks for new Exynos5422 Dynamic Memory Controller driver - Clock definition for Exynos4412 Mali - Add CMM (Color Management Module) clocks on Renesas R-Car H3, M3-N, E3, and D3 - Add TPU (Timer Pulse Unit / PWM) clocks on Renesas RZ/G2M - Support for 32 bit clock IDs in TI's sci-clks for J721e SoCs - TI clock probing done from DT by default instead of firmware - Fix Amlogic Meson mpll fractional part and spread sprectrum issues - Add Amlogic meson8 audio clocks - Add Amlogic g12a temperature sensors clocks - Add Amlogic g12a and g12b cpu clocks - Add TPU (Timer Pulse Unit / PWM) clocks on Renesas R-Car H3, M3-W, and M3-N - Add CMM (Color Management Module) clocks on Renesas R-Car M3-W - Add Clock Domain support on Renesas RZ/N1" * tag 'clk-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/clk/linux: (190 commits) clk: consoldiate the __clk_get_hw() declarations clk: sprd: Add check for return value of sprd_clk_regmap_init() clk: lochnagar: Update DT binding doc to include the primary SPDIF MCLK clk: Add Si5341/Si5340 driver dt-bindings: clock: Add silabs,si5341 clk: clk-si544: Implement small frequency change support clk: add BCM63XX gated clock controller driver devicetree: document the BCM63XX gated clock bindings clk: at91: sckc: use dedicated functions to unregister clock clk: at91: sckc: improve error path for sama5d4 sck registration clk: at91: sckc: remove unnecessary line clk: at91: sckc: improve error path for sam9x5 sck register clk: at91: sckc: add support to free slow clock osclillator clk: at91: sckc: add support to free slow rc oscillator clk: at91: sckc: add support to free slow oscillator clk: rockchip: export HDMIPHY clock on rk3228 clk: rockchip: add watchdog pclk on rk3328 clk: rockchip: add clock id for hdmi_phy special clock on rk3228 clk: rockchip: add clock id for watchdog pclk on rk3328 clk: at91: sckc: add support for SAM9X60 ...
2019-06-07clk: keystone: sci-clk: extend clock IDs to 32 bitsTero Kristo
Currently, the clock identifiers are limited to 255. To support future SoCs, this muse be extended to 32 bits, which should provide way more than enough space. Basic support for extending the clock API is going to be implemented in the firmware driver, but there are some minor changes that need to be done on the clock driver side first. Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Tero Kristo <t-kristo@ti.com>
2019-06-07clk: keystone: sci-clk: probe clocks from DT instead of firmwareTero Kristo
Probing all the available clocks from the PM firmware takes quite a lot of time, increasing boot time. Instead, implement functionality that parses only the used clocks from DT, and registers these to clock core. This way, the boot time is greatly improved. Additionally, provide a Kconfig option for parsing all the clocks from firmware, if someone requires this. It is mostly useful as a debugging functionality if we want to inspect the whole clock tree. Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Tero Kristo <t-kristo@ti.com>
2019-06-07clk: keystone: sci-clk: split out the fw clock parsing to own functionTero Kristo
This makes it both easier to see what the probe does, and also makes it possible to add alternative implementations for the clock data source. Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Tero Kristo <t-kristo@ti.com>
2019-06-07clk: keystone: sci-clk: cut down the clock name lengthTero Kristo
There is no need to store the full node name to the individual clocks, as this will just consome memory and make the clock debug entries unnecessary long. Just shorten this to "clk" for now. Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Tero Kristo <t-kristo@ti.com>
2019-05-30treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 152Thomas Gleixner
Based on 1 normalized pattern(s): this program is free software you can redistribute it and or modify it under the terms of the gnu general public license as published by the free software foundation either version 2 of the license or at your option any later version extracted by the scancode license scanner the SPDX license identifier GPL-2.0-or-later has been chosen to replace the boilerplate/reference in 3029 file(s). Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Allison Randal <allison@lohutok.net> Cc: linux-spdx@vger.kernel.org Link: https://lkml.kernel.org/r/20190527070032.746973796@linutronix.de Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2018-10-18Merge branch 'clk-k3-tisci' into clk-nextStephen Boyd
- TI SCI clks on K3 SoCs * clk-k3-tisci: clk: keystone: add missing MODULE_LICENSE clk: keystone: Enable TISCI clocks if K3_ARCH
2018-10-07clk: keystone: add missing MODULE_LICENSEArnd Bergmann
A randconfig build showed that two clk modules have no license tag: WARNING: modpost: missing MODULE_LICENSE() in drivers/clk/keystone/gate.o see include/linux/module.h for more information WARNING: modpost: missing MODULE_LICENSE() in drivers/clk/keystone/pll.o see include/linux/module.h for more information Add the appropriate information from the comment at the start of the two files. Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Santosh Shilimkar <ssantosh@krenel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-10-02clk: keystone: Enable TISCI clocks if K3_ARCHNishanth Menon
K3_ARCH uses TISCI for clocks as well. Enable the same for the driver support. Signed-off-by: Nishanth Menon <nm@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-08-30clk: Convert to using %pOFn instead of device_node.nameRob Herring
In preparation to remove the node name pointer from struct device_node, convert printf users to use the %pOFn format specifier. Cc: Eugeniy Paltsev <Eugeniy.Paltsev@synopsys.com> Cc: Michael Turquette <mturquette@baylibre.com> Cc: Stephen Boyd <sboyd@kernel.org> Cc: linux-clk@vger.kernel.org Cc: linux-arm-kernel@lists.infradead.org Cc: linux-renesas-soc@vger.kernel.org Cc: linux-omap@vger.kernel.org Signed-off-by: Rob Herring <robh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2018-03-08clk: keystone: sci-clk: add support for dynamically probing clocksTero Kristo
Currently, the driver contains a large hints table for clocks that exist on a device, however, it is possible to probe the clocks from the firmware also. Add support for this, and drop the clock hints table support from the driver completely. This causes the driver to send a few extra sci-clk messages during boot, basically one extra for each device that exists on the SoC; on K2G this is approx 80. Signed-off-by: Tero Kristo <t-kristo@ti.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org>
2017-08-02clk: keystone: sci-clk: Fix sci_clk_getTero Kristo
Currently a bug in the sci_clk_get implementation causes it to always return a clock belonging to the last device in the static list of clock data. This is due to a bug in the init code that causes the array used by sci_clk_get to only be populated with the clocks for the last device, as each device overwrites the entire array with its own clocks. Fix this by calculating the actual number of clocks for the SoC, and allocating the whole array in one go. Also, we don't need the handle to the init data array anymore after doing this, instead we can just compare the dev_id / clk_id against the registered clocks and use binary search for speed. Signed-off-by: Tero Kristo <t-kristo@ti.com> Reported-by: Dave Gerlach <d-gerlach@ti.com> Fixes: b745c0794e2f ("clk: keystone: Add sci-clk driver support") Cc: Nishanth Menon <nm@ti.com> Tested-by: Franklin Cooper <fcooper@ti.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-06-22clk: keystone: TI_SCI_PROTOCOL is needed for clk driverArnd Bergmann
CONFIG_COMPILE_TEST allows building a configuration without TI_SCI_PROTOCOL, which then fails to link: drivers/clk/keystone/sci-clk.o: In function `ti_sci_clk_probe': sci-clk.c:(.text.ti_sci_clk_probe+0x4c): undefined reference to `devm_ti_sci_get_handle' This makes it a hard dependency. Right now, that means we can't actually compile-test the driver unless ARCH_KEYSTONE is set as well, but we can fix that by allowing TI_MESSAGE_MANAGER to be selected for COMPILE_TEST as well. Fixes: b745c0794e2f ("clk: keystone: Add sci-clk driver support") Signed-off-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Tero Kristo <t-kristo@ti.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2017-06-14clk: keystone: Add sci-clk driver supportTero Kristo
In K2G, the clock handling is done through firmware executing on a separate core. Linux kernel needs to communicate to the firmware through TI system control interface to access any power management related resources, including clocks. The keystone sci-clk driver does this, by communicating to the firmware through the TI SCI driver. The driver adds support for registering clocks through DT, and basic required clock operations like prepare/get_rate, etc. Signed-off-by: Tero Kristo <t-kristo@ti.com> [sboyd@codeaurora.org: Make ti_sci_init_clocks() static] Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-12-08clk: keystone: pll: Unmap region obtained by of_iomapArvind Yadav
Free memory mapping, if of_pll_div_clk_init is not successful. Signed-off-by: Arvind Yadav <arvind.yadav.cs@gmail.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2016-11-01clk: keystone: improve function-level documentationJulia Lawall
Adjust the documentation to use the actual function names. Issue detected using Coccinelle (http://coccinelle.lip6.fr/) Signed-off-by: Julia Lawall <Julia.Lawall@lip6.fr> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-10-19clk: keystone: fix a trivial typoGeliang Tang
s/regsiter/register/ Signed-off-by: Geliang Tang <geliangtang@163.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-28Merge branch 'cleanup-clk-h-includes' into clk-nextStephen Boyd
* cleanup-clk-h-includes: (62 commits) clk: Remove clk.h from clk-provider.h clk: h8300: Remove clk.h and clkdev.h includes clk: at91: Include clk.h and slab.h clk: ti: Switch clk-provider.h include to clk.h clk: pistachio: Include clk.h clk: ingenic: Include clk.h clk: si570: Include clk.h clk: moxart: Include clk.h clk: cdce925: Include clk.h clk: Include clk.h in clk.c clk: zynq: Include clk.h clk: ti: Include clk.h clk: sunxi: Include clk.h and remove unused clkdev.h includes clk: st: Include clk.h clk: qcom: Include clk.h clk: highbank: Include clk.h clk: bcm: Include clk.h clk: versatile: Remove clk.h and clkdev.h includes clk: ux500: Remove clk.h and clkdev.h includes clk: tegra: Properly include clk.h ...
2015-07-28clk: keystone: make use of of_clk_parent_fill helper functionDinh Nguyen
Use of_clk_parent_fill to fill in the parent clock names' array. Signed-off-by: Dinh Nguyen <dinguyen@opensource.altera.com> Acked-by: Santosh Shilimkar <ssantosh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-07-20clk: keystone: Remove clk.h includeStephen Boyd
Clock provider drivers generally shouldn't include clk.h because it's the consumer API. Remove the include here because this is a provider driver. Cc: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com> Cc: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
2015-06-18clk: keystone: add support for post divider register for main pllMurali Karicheri
Main PLL controller has post divider bits in a separate register in pll controller. Use the value from this register instead of fixed divider when available. Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Michael Turquette <mturquette@baylibre.com>
2014-02-10clk: keystone: gate: fix clk_init_data initializationIvan Khoronzhuk
The clk_init_data struct is allocated in the stack. All members of this struct should be initialized before using otherwise it will lead to unpredictable situation as it can contain garbage. Ultimately the clk->flag field contains garbage. In my case it leads that flag CLK_IGNORE_UNUSED is set for most of clocks. As result a bunch of unused clocks cannot be disabled. So initialize flags in this structure too. Cc: Mike Turquette <mturquette@linaro.org> Signed-off-by: Ivan Khoronzhuk <ivan.khoronzhuk@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-12-10clk: keystone: gate: fix error handling on initGrygorii Strashko
This patch fixes Keystone gate control clock driver initialization path: 1) clk_register_psc() returns error code and not a pure pointer, hence its return value need to be checked using IS_ERR(clk) macro. 2) Mapped IO memory isn't unmapped in case of errors, hence fix it. Cc: Mike Turquette <mturquette@linaro.org Signed-off-by: Grygorii Strashko <grygorii.strashko@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-12-10clk: keystone: use clkod register bits for postdivMurali Karicheri
DDR3A/B, ARM and PA PLL controllers have clkod register bits for configuring postdiv values. So use it instead of using fixed post dividers for these pll controllers. Assume that if fixed-postdiv attribute is not present, use clkod register value for pistdiv. Also update the Documentation of bindings to reflect the same. Cc: Mike Turquette <mturquette@linaro.org Signed-off-by: Murali Karicheri <m-karicheri2@ti.com> Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com>
2013-10-07clk: keystone: Build Keystone clock driversSantosh Shilimkar
Now build the keystone common clock drivers. The build is made conditional based on COMMON_CLK_KEYSTONE Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-10-07clk: keystone: Add gate control clock driverSantosh Shilimkar
Add the driver for the clock gate control which uses PSC (Power Sleep Controller) IP on Keystone 2 based SOCs. It is responsible for enabling and disabling of the clocks for different IPs present in the SoC. Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
2013-10-07clk: keystone: add Keystone PLL clock driverSantosh Shilimkar
Add the driver for the PLL IPs found on Keystone 2 devices. The PLL IP typically has a multiplier, a divider and a post-divider. The PLL IPs like ARMPLL, DDRPLL and PAPLL are controlled by the memory mapped register where as the Main PLL is controlled by a PLL controller and memory map registers. Signed-off-by: Santosh Shilimkar <santosh.shilimkar@ti.com> Signed-off-by: Mike Turquette <mturquette@linaro.org>
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