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2020-01-09clk: qcom: Add ipq6018 Global Clock Controller supportSricharan R3-0/+4644
This patch adds support for the global clock controller found on the ipq6018 based devices. Also fixed the sparse warnings reported by, Reported-by: kbuild test robot <lkp@intel.com> Co-developed-by: Anusha Canchi Ramachandra Rao <anusharao@codeaurora.org> Signed-off-by: Anusha Canchi Ramachandra Rao <anusharao@codeaurora.org> Co-developed-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Co-developed-by: Sivaprakash Murugesan <sivaprak@codeaurora.org> Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Link: https://lkml.kernel.org/r/1578557121-423-3-git-send-email-sricharan@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-09clk: qcom: Add DT bindings for ipq6018 gcc clock controllerSricharan R3-1/+421
Add the compatible strings and the include file for ipq6018 gcc clock controller. Co-developed-by: Anusha Canchi Ramachandra Rao <anusharao@codeaurora.org> Signed-off-by: Anusha Canchi Ramachandra Rao <anusharao@codeaurora.org> Co-developed-by: Abhishek Sahu <absahu@codeaurora.org> Signed-off-by: Abhishek Sahu <absahu@codeaurora.org> Co-developed-by: Sivaprakash Murugesan <sivaprak@codeaurora.org> Signed-off-by: Sivaprakash Murugesan <sivaprak@codeaurora.org> Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Sricharan R <sricharan@codeaurora.org> Link: https://lkml.kernel.org/r/1578557121-423-2-git-send-email-sricharan@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-08clk: tegra: Mark fuse clock as criticalStephen Warren1-1/+5
For a little over a year, U-Boot on Tegra124 has configured the flow controller to perform automatic RAM re-repair on off->on power transitions of the CPU rail[1]. This is mandatory for correct operation of Tegra124. However, RAM re-repair relies on certain clocks, which the kernel must enable and leave running. The fuse clock is one of those clocks. Mark this clock as critical so that LP1 power mode (system suspend) operates correctly. [1] 3cc7942a4ae5 ARM: tegra: implement RAM repair Reported-by: Jonathan Hunter <jonathanh@nvidia.com> Cc: stable@vger.kernel.org Signed-off-by: Stephen Warren <swarren@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
2020-01-08clk: renesas: Prepare for split of R-Car H3 config symbolGeert Uytterhoeven1-1/+1
Despite using the same compatible values ("r8a7795"-based) because of historical reasons, R-Car H3 ES1.x (R8A77950) and R-Car H3 ES2.0+ (R8A77951) are really different SoCs, with different part numbers. Hence the SoC configuration symbol will be split in two separate config symbols. As the Clock Pulse Generator / Module Standby and Software Reset blocks in both SoCs are very similar, they will keep on sharing a driver. Extend the dependency of CONFIG_CLK_R8A7795, to prepare for the split. Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Reviewed-by: Niklas Söderlund <niklas.soderlund+renesas@ragnatech.se> Link: https://lore.kernel.org/r/20191230080902.2832-1-geert+renesas@glider.be
2020-01-08clk: divider: Add support for specifying parents via DT/pointersStephen Boyd2-94/+152
After commit fc0c209c147f ("clk: Allow parents to be specified without string names") we can use DT or direct clk_hw pointers to specify parents. Create a generic function that shouldn't be used very often to encode the multitude of ways of registering a divider clk with different parent information. Then add a bunch of wrapper macros that only pass down what needs to be passed down to the generic function to support this with less arguments. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-13-sboyd@kernel.org [sboyd@kernel.org: Export __clk_hw_register_divider]
2020-01-07clk: clarify that clk_set_rate() does updates from top to bottomMartin Blumenstingl1-0/+3
clk_set_rate() currently starts updating the rate for a clock at the top-most affected clock and then walks down the tree to update the bottom-most affected clock last. This behavior is important for protected clocks where we can switch between multiple parents to achieve the same output. An example for this is the mali clock tree on Amlogic SoCs: mali_0_mux (must not change when enabled) mali_0_div (must not change when enabled) mali_0 (gate) mali_1_mux (must not change when enabled) mali_1_div (must not change when enabled) mali_1 (gate) The final output can either use mali_0_gate or mali_1. To change the final output we must switch to the "inactive" tree. Assuming mali_0 is active, then we need to prepare mali_1 with the new desired rate and finally switch the output to the mali_1 tree. This process will then protect the mali_1 tree and at the same time unprotect the mali_0 tree. The next call to clk_set_rate() will then switch from the mali_1 tree back to mali_0. Acked-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
2020-01-07clk: meson: meson8b: make the CCF use the glitch-free mali muxMartin Blumenstingl1-4/+7
The "mali_0" or "mali_1" clock trees should not be updated while the clock is running. Enforce this by setting CLK_SET_RATE_GATE on the "mali_0" and "mali_1" gates. This makes the CCF switch to the "mali_1" tree when "mali_0" is currently active and vice versa, which is exactly what the vendor driver does when updating the frequency of the mali clock. This fixes a potential hang when changing the GPU frequency at runtime. Fixes: 74e1f2521f16ff ("clk: meson: meson8b: add the GPU clock tree") Signed-off-by: Martin Blumenstingl <martin.blumenstingl@googlemail.com> Signed-off-by: Jerome Brunet <jbrunet@baylibre.com>
2020-01-07clk: gate: Add support for specifying parents via DT/pointersStephen Boyd2-20/+74
After commit fc0c209c147f ("clk: Allow parents to be specified without string names") we can use DT or direct clk_hw pointers to specify parents. Create a generic function that shouldn't be used very often to encode the multitude of ways of registering a gate clk with different parent information. Then add a bunch of wrapper macros that only pass down what needs to be passed down to the generic function to support this with less arguments. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-12-sboyd@kernel.org
2020-01-07clk: mux: Add support for specifying parents via DT/pointersStephen Boyd4-62/+60
After commit fc0c209c147f ("clk: Allow parents to be specified without string names") we can use DT or direct clk_hw pointers to specify parents. Create a generic function that shouldn't be used very often to encode the multitude of ways of registering a mux clk with different parent information. Then add a bunch of wrapper macros that only pass down what needs to be passed down to the generic function to support this with less arguments. Note: the msm drm driver passes an anonymous array through the macro which seems to confuse my compiler. Adding a parenthesis around the whole thing at the call site seems to fix it but it must be wrong. Maybe it's better to split this patch and pick out the array bits there? Cc: Rob Clark <robdclark@gmail.com> Cc: Sean Paul <sean@poorly.run> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-11-sboyd@kernel.org
2020-01-07clk: asm9260: Use parent accuracy in fixed rate clkStephen Boyd1-4/+4
This fixed rate clk is registered with the accuracy of the parent. Use CLK_FIXED_RATE_PARENT_ACCURACY for that instead of getting the parent clk and finding out the accuracy that way. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-10-sboyd@kernel.org
2020-01-07clk: fixed-rate: Document that accuracy isn't a rateStephen Boyd1-1/+1
This kernel-doc talks about a rate for the accuracy. That's wrong. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-9-sboyd@kernel.org
2020-01-07clk: fixed-rate: Add clk flags for parent accuracyStephen Boyd2-1/+12
Some clk providers want to use the accuracy of the parent clk and use the fixed rate basic type clk to do that. This requires getting the parent clk and extracting the accuracy before registering the fixed rate clk. Let's add a flag for this and update the clk_ops to support this. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-8-sboyd@kernel.org
2020-01-06clk: qcom: gcc-msm8996: Fix parent for CLKREF clocksBjorn Andersson2-7/+38
The CLKREF clocks are all fed by the clock signal on the CXO2 pad on the SoC. Update the definition of these clocks to allow this to be wired up to the appropriate clock source. Retain "xo" as the global named parent to make the change a nop in the event that DT doesn't carry the necessary clocks definition. Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org> Link: https://lkml.kernel.org/r/20200106080546.3192125-2-bjorn.andersson@linaro.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-06clk: qcom: rpmh: Add IPA clock for SC7180Taniya Das1-0/+1
The Qualcomm IP Accelerator (IPA) clock resource that is managed by the BCM is required by the IPA driver in order to scale its core clock. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1578305923-29125-3-git-send-email-tdas@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-06clk: qcom: rpmh: skip undefined clocks when registeringTaniya Das1-1/+6
When iterating over a platform's available clocks in clk_rpmh_probe(), check for undefined (null) entries in the clocks array. Not all clock indexes necessarily have clocks defined. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1578305923-29125-2-git-send-email-tdas@codeaurora.org [sboyd@kernel.org: Leave 'name' declaration at beginning of loop] Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-06clk: Add support for setting clk_rate via debugfsGeert Uytterhoeven1-1/+37
For testing, it is useful to be able to specify a clock rate manually. As this is a dangerous feature, it is not enabled by default. Users need to modify the source directly and #define CLOCK_ALLOW_WRITE_DEBUGFS. This follows the spirit of commit 09c6ecd394105c48 ("regmap: Add support for writing to regmap registers via debugfs"). Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> Link: https://lkml.kernel.org/r/20190828132306.19012-1-geert+renesas@glider.be Suggested-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-06clk: at91: sam9x60: fix programmable clock prescalerEugen Hristev1-0/+1
The prescaler works as parent rate divided by (PRES + 1) (is_pres_direct == 1) It does not work in the way of parent rate shifted to the right by (PRES + 1), which means division by 2^(PRES + 1) (is_pres_direct == 0) Thus is_pres_direct must be enabled for this SoC, to make the right computation. This field was added in commit 45b06682113b ("clk: at91: fix programmable clock for sama5d2") SAM9X60 has the same field as SAMA5D2 in the PCK Fixes: 01e2113de9a5 ("clk: at91: add sam9x60 pmc driver") Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Link: https://lkml.kernel.org/r/1575977088-16781-1-git-send-email-eugen.hristev@microchip.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-06clk: at91: sam9x60-pll: adapt PMC_PLL_ACR default valueEugen Hristev1-2/+6
Product datasheet recommends different values for UPLL and PLLA analog control register. Adapt accordingly. Signed-off-by: Eugen Hristev <eugen.hristev@microchip.com> Link: https://lkml.kernel.org/r/1573478913-19737-1-git-send-email-eugen.hristev@microchip.com Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-06clk: fixed-rate: Add support for specifying parents via DT/pointersStephen Boyd2-42/+114
After commit fc0c209c147f ("clk: Allow parents to be specified without string names") we can use DT or direct clk_hw pointers to specify parents. Create a generic function that shouldn't be used very often to encode the multitude of ways of registering a fixed rate clk with different parent information. Then add a bunch of wrapper macros that only pass down what needs to be passed down to the generic function to support this with less arguments. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-7-sboyd@kernel.org
2020-01-06clk: fixed-rate: Document accuracy memberStephen Boyd1-0/+1
This member isn't documented, leading to kernel-doc warnings. Document it. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-6-sboyd@kernel.org
2020-01-06clk: fixed-rate: Move to_clk_fixed_rate() to C fileStephen Boyd2-2/+2
The only user of this macro is the fixed rate basic type. Move it there to avoid polluting provider drivers. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-5-sboyd@kernel.org
2020-01-06clk: fixed-rate: Remove clk_register_fixed_rate_with_accuracy()Stephen Boyd2-19/+7
There aren't any users of this API anymore. Remove it. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-4-sboyd@kernel.org
2020-01-06clk: fixed-rate: Convert to clk_hw based APIsStephen Boyd1-16/+15
This code still uses struct clk to register clks from the probe path. Migrate this to the clk_hw based APIs to modernize the code. Also, this isn't a module and it can't be one because the driver is always builtin so drop the module table. Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-3-sboyd@kernel.org
2020-01-06clk: gpio: Use DT way of specifying parentsStephen Boyd2-151/+59
Nobody has used the gpio clk registration functions nor the gpio clk_ops exposed by the basic gpio clk type. Let's remove all those APIs and move the gpio clk support into the C file. Since nothing is using the exported APIs, simplify the driver to be a platform driver that uses clk_parent_data to pick 0th or 1st cell of the node's clocks property. Cc: Simon Horman <horms@verge.net.au> Cc: Magnus Damm <magnus.damm@gmail.com> Cc: Geert Uytterhoeven <geert+renesas@glider.be> Cc: Enric Balletbo i Serra <enric.balletbo@collabora.com> Cc: Tony Lindgren <tony@atomide.com> Cc: Manivannan Sadhasivam <manivannan.sadhasivam@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20190830150923.259497-2-sboyd@kernel.org
2020-01-05clk: Fix Kconfig indentationKrzysztof Kozlowski5-27/+27
Adjust indentation from spaces to tab (+optional two spaces) as in coding style with command like: $ sed -e 's/^ /\t/' -i */Kconfig Signed-off-by: Krzysztof Kozlowski <krzk@kernel.org> Link: https://lkml.kernel.org/r/1574306335-29026-1-git-send-email-krzk@kernel.org [sboyd@kernel.org: Fixup mediatek to have two spaces for help indent] Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05clk: ux500: Fix up the SGA clock for some variantsLinus Walleij1-0/+2
Some of the special PRCMU firmware variants were not properly detected in the Ux500 clock driver, resulting in the wrong clock for the SGA. Cc: Ulf Hansson <ulf.hansson@linaro.org> Cc: Stephan Gerhold <stephan@gerhold.net> Signed-off-by: Linus Walleij <linus.walleij@linaro.org> Link: https://lkml.kernel.org/r/20191217210504.27888-1-linus.walleij@linaro.org Acked-by: Ulf Hansson <ulf.hansson@linaro.org> Reviewed-by: Stephan Gerhold <stephan@gerhold.net> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05clk: qcom: Add video clock controller driver for SC7180Taniya Das3-0/+268
Add support for the video clock controller found on SC7180 based devices. This would allow video drivers to probe and control their clocks. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1577428714-17766-7-git-send-email-tdas@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05dt-bindings: clock: Introduce SC7180 QCOM Video clock bindingsTaniya Das2-0/+24
Add device tree bindings for video clock controller for Qualcomm Technology Inc's SC7180 SoCs. Signed-off-by: Taniya Das <tdas@codeaurora.org> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lkml.kernel.org/r/1577428714-17766-6-git-send-email-tdas@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05dt-bindings: clock: Add YAML schemas for the QCOM VIDEOCC clock bindingsTaniya Das2-18/+61
The VIDEOCC clock provider have a bunch of generic properties that are needed in a device tree. Add a YAML schemas for those. Signed-off-by: Taniya Das <tdas@codeaurora.org> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lkml.kernel.org/r/1577428714-17766-5-git-send-email-tdas@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05clk: qcom: Add graphics clock controller driver for SC7180Taniya Das3-0/+275
Add support for the graphics clock controller found on SC7180 based devices. This would allow graphics drivers to probe and control their clocks. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1577428714-17766-4-git-send-email-tdas@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05dt-bindings: clock: Introduce SC7180 QCOM Graphics clock bindingsTaniya Das2-0/+22
Add device tree bindings for graphics clock controller for Qualcomm Technology Inc's SC7180 SoCs. Signed-off-by: Taniya Das <tdas@codeaurora.org> Reviewed-by: Rob Herring <robh@kernel.org> Link: https://lkml.kernel.org/r/1577428714-17766-3-git-send-email-tdas@codeaurora.org [sboyd@kernel.org: Indicate sc7180 in commit subject] Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05dt-bindings: clock: Add YAML schemas for the QCOM GPUCC clock bindingsTaniya Das2-24/+71
The GPUCC clock provider have a bunch of generic properties that are needed in a device tree. Add a YAML schemas for those. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1577428714-17766-2-git-send-email-tdas@codeaurora.org Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05clk: Warn about critical clks that fail to enableStephen Boyd1-1/+6
If we don't warn here users of the CLK_IS_CRITICAL flag may not know that their clk isn't actually enabled because it silently fails to enable. Let's print a warning in that case so developers find these problems faster. Suggested-by: Jerome Brunet <jbrunet@baylibre.com> Cc: Guenter Roeck <linux@roeck-us.net> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20200102005503.71923-1-sboyd@kernel.org Reviewed-by: Jerome Brunet <jbrunet@baylibre.com> Reviewed-by: Guenter Roeck <linux@roeck-us.net>
2020-01-05clk: qcom: apcs-msm8916: use clk_parent_data to specify the parentNiklas Cassel1-5/+5
Allow accessing the parent clock names required for the driver operation by using the device tree 'clock-names' property, while falling back to the previous method of using names in the global name space. This permits extending the driver to other platforms without having to modify its source code. Co-developed-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> Signed-off-by: Jorge Ramirez-Ortiz <jorge.ramirez-ortiz@linaro.org> Signed-off-by: Niklas Cassel <niklas.cassel@linaro.org> Link: https://lkml.kernel.org/r/20200103111429.1347-1-nks@flawful.org Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05clk: uniphier: Add SCSSI clock gate for each channelKunihiko Hayashi1-5/+8
SCSSI has clock gates for each channel in the SoCs newer than Pro4, so this adds missing clock gates for channel 1, 2 and 3. And more, this moves MCSSI clock ID after SCSSI. Fixes: ff388ee36516 ("clk: uniphier: add clock frequency support for SPI") Signed-off-by: Kunihiko Hayashi <hayashi.kunihiko@socionext.com> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com> Link: https://lkml.kernel.org/r/1577410925-22021-1-git-send-email-hayashi.kunihiko@socionext.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2020-01-05Merge branch 'clk-register-dt-node-better' into clk-qcomStephen Boyd1-2/+25
* clk-register-dt-node-better: clk: Use parent node pointer during registration if necessary
2020-01-05clk: Use parent node pointer during registration if necessaryStephen Boyd1-2/+25
Sometimes clk drivers are attached to devices which are children of a parent device that is connected to a node in DT. This happens when devices are MFD-ish and the parent device driver mostly registers child devices to match against drivers placed in their respective subsystem directories like drivers/clk, drivers/regulator, etc. When the clk driver calls clk_register() with a device pointer, that struct device pointer won't have a device_node associated with it because it was created purely in software as a way to partition logic to a subsystem. This causes problems for the way we find parent clks for the clks registered by these child devices because we look at the registering device's device_node pointer to lookup 'clocks' and 'clock-names' properties. Let's use the parent device's device_node pointer if the registering device doesn't have a device_node but the parent does. This simplifies clk registration code by avoiding the need to assign some device_node to the device registering the clk. Cc: Bjorn Andersson <bjorn.andersson@linaro.org> Reported-by: Niklas Cassel <niklas.cassel@linaro.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lkml.kernel.org/r/20191230190455.141339-1-sboyd@kernel.org [sboyd@kernel.org: Fixup kernel-doc notation] Reviewed-by: Niklas Cassel <nks@flawful.org> Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org> Tested-by: Bjorn Andersson <bjorn.andersson@linaro.org>
2020-01-04clk: sunxi: a23/a33: Export the MIPI PLLMaxime Ripard2-1/+5
The MIPI PLL is used for LVDS. Make sure it's exported in the dt bindings headers. Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
2020-01-04clk: sunxi: a31: Export the MIPI PLLMaxime Ripard2-1/+5
The MIPI PLL is used for LVDS. Make sure it's exported in the dt bindings headers. Acked-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
2020-01-04clk: sunxi-ng: a64: export CLK_CPUX clock for DVFSVasily Khoruzhick2-1/+1
Export CLK_CPUX so we can reference it in CPU node. Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
2020-01-04clk: sunxi-ng: add mux and pll notifiers for A64 CPU clockIcenowy Zheng1-1/+27
The A64 PLL_CPU clock has the same instability if some factor changed without the PLL gated like other SoCs with sun6i-style CCU, e.g. A33, H3. Add the mux and pll notifiers for A64 CPU clock to workaround the problem. Fixes: c6a0637460c2 ("clk: sunxi-ng: Add A64 clocks") Signed-off-by: Icenowy Zheng <icenowy@aosc.io> Signed-off-by: Vasily Khoruzhick <anarsoul@gmail.com> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
2020-01-03clk: sunxi-ng: r40: Export MBUS clockChen-Yu Tsai2-5/+1
The MBUS clock needs to be referenced in the MBUS device node. Export it. Signed-off-by: Chen-Yu Tsai <wens@csie.org> Signed-off-by: Maxime Ripard <maxime@cerno.tech>
2019-12-27clk: Don't try to enable critical clocks if prepare failedGuenter Roeck1-2/+8
The following traceback is seen if a critical clock fails to prepare. bcm2835-clk 3f101000.cprman: plld: couldn't lock PLL ------------[ cut here ]------------ Enabling unprepared plld_per WARNING: CPU: 1 PID: 1 at drivers/clk/clk.c:1014 clk_core_enable+0xcc/0x2c0 ... Call trace: clk_core_enable+0xcc/0x2c0 __clk_register+0x5c4/0x788 devm_clk_hw_register+0x4c/0xb0 bcm2835_register_pll_divider+0xc0/0x150 bcm2835_clk_probe+0x134/0x1e8 platform_drv_probe+0x50/0xa0 really_probe+0xd4/0x308 driver_probe_device+0x54/0xe8 device_driver_attach+0x6c/0x78 __driver_attach+0x54/0xd8 ... Check return values from clk_core_prepare() and clk_core_enable() and bail out if any of those functions returns an error. Cc: Jerome Brunet <jbrunet@baylibre.com> Fixes: 99652a469df1 ("clk: migrate the count of orphaned clocks at init") Signed-off-by: Guenter Roeck <linux@roeck-us.net> Link: https://lkml.kernel.org/r/20191225163429.29694-1-linux@roeck-us.net Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24clk: bm1800: Remove set but not used variable 'fref'YueHaibing1-2/+1
Fixes gcc '-Wunused-but-set-variable' warning: drivers/clk/clk-bm1880.c: In function 'bm1880_pll_rate_calc': drivers/clk/clk-bm1880.c:477:13: warning: variable 'fref' set but not used [-Wunused-but-set-variable] It is never used, so remove it. Reported-by: Hulk Robot <hulkci@huawei.com> Signed-off-by: YueHaibing <yuehaibing@huawei.com> Link: https://lkml.kernel.org/r/20191129033534.188257-1-yuehaibing@huawei.com Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24clk: tegra: Fix double-free in tegra_clk_init()Dmitry Osipenko1-1/+3
It's unlikely to happen in practice ever, but makes static checkers happy. Fixes: 535f296d47de ("clk: tegra: Add suspend and resume support on Tegra210") Reported-by: Stephen Boyd <sboyd@kernel.org> Signed-off-by: Dmitry Osipenko <digetx@gmail.com> Link: https://lkml.kernel.org/r/20191210020512.6088-1-digetx@gmail.com Acked-by: Thierry Reding <treding@nvidia.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24clk: samsung: exynos5420: Keep top G3D clocks enabledMarek Szyprowski1-0/+8
In Exynos542x/5800 SoCs, the G3D leaf clocks are located in the G3D power domain. This is similar to the other hardware modules and their power domains. However there is one thing specific to G3D clocks hierarchy. Unlike other hardware modules, the G3D clocks hierarchy doesn't have any gate clock between the TOP part of the hierarchy and the part located in the power domain and some SoC internal busses are sourced directly from the TOP muxes. The consequence of this design if the fact that the TOP part of the hierarchy has to be enabled permanently to ensure proper operation of the SoC power related components (G3D power domain and Exynos Power Management Unit for system suspend/resume). This patch adds an explicit call to clk_prepare_enable() on the last MUX in the TOP part of G3D clock hierarchy to keep it enabled permanently to ensure that the internal busses get their clock regardless of the main G3D clock enablement status. This fixes following imprecise abort issue observed on Odroid XU3/XU4 after enabling Panfrost driver by commit 1a5a85c56402 "ARM: dts: exynos: Add Mali/GPU node on Exynos5420 and enable it on Odroid XU3/4"): panfrost 11800000.gpu: clock rate = 400000000 panfrost 11800000.gpu: failed to get regulator: -517 panfrost 11800000.gpu: regulator init failed -517 Power domain G3D disable failed ... panfrost 11800000.gpu: clock rate = 400000000 8<--- cut here --- Unhandled fault: imprecise external abort (0x1406) at 0x00000000 pgd = (ptrval) [00000000] *pgd=00000000 Internal error: : 1406 [#1] PREEMPT SMP ARM Modules linked in: CPU: 7 PID: 53 Comm: kworker/7:1 Not tainted 5.4.0-rc8-next-20191119-00032-g56f1001191a6 #6923 Hardware name: SAMSUNG EXYNOS (Flattened Device Tree) Workqueue: events deferred_probe_work_func PC is at panfrost_gpu_soft_reset+0x94/0x110 LR is at ___might_sleep+0x128/0x2dc ... [<c05c231c>] (panfrost_gpu_soft_reset) from [<c05c2704>] (panfrost_gpu_init+0x10/0x67c) [<c05c2704>] (panfrost_gpu_init) from [<c05c15d0>] (panfrost_device_init+0x158/0x2cc) [<c05c15d0>] (panfrost_device_init) from [<c05c0cb0>] (panfrost_probe+0x80/0x178) [<c05c0cb0>] (panfrost_probe) from [<c05cfaa0>] (platform_drv_probe+0x48/0x9c) [<c05cfaa0>] (platform_drv_probe) from [<c05cd20c>] (really_probe+0x1c4/0x474) [<c05cd20c>] (really_probe) from [<c05cd694>] (driver_probe_device+0x78/0x1bc) [<c05cd694>] (driver_probe_device) from [<c05cb374>] (bus_for_each_drv+0x74/0xb8) [<c05cb374>] (bus_for_each_drv) from [<c05ccfa8>] (__device_attach+0xd4/0x16c) [<c05ccfa8>] (__device_attach) from [<c05cc110>] (bus_probe_device+0x88/0x90) [<c05cc110>] (bus_probe_device) from [<c05cc634>] (deferred_probe_work_func+0x4c/0xd0) [<c05cc634>] (deferred_probe_work_func) from [<c0149df0>] (process_one_work+0x300/0x864) [<c0149df0>] (process_one_work) from [<c014a3ac>] (worker_thread+0x58/0x5a0) [<c014a3ac>] (worker_thread) from [<c0151174>] (kthread+0x12c/0x160) [<c0151174>] (kthread) from [<c01010b4>] (ret_from_fork+0x14/0x20) Exception stack(0xee03dfb0 to 0xee03dff8) ... Code: e594300c e5933020 e3130c01 1a00000f (ebefff50). ---[ end trace badde2b74a65a540 ]--- In the above case, the Panfrost driver disables G3D clocks after failure of getting the needed regulator and return with -EPROVE_DEFER code. This causes G3D power domain disable failure and then, during second probe an imprecise abort is triggered due to undefined power domain state. Fixes: 45f10dabb56b ("clk: samsung: exynos5420: Add SET_RATE_PARENT flag to clocks on G3D path") Fixes: c9f7567aff31 ("clk: samsung: exynos542x: Move G3D subsystem clocks to its sub-CMU") Signed-off-by: Marek Szyprowski <m.szyprowski@samsung.com> Link: https://lkml.kernel.org/r/20191216131407.17225-1-m.szyprowski@samsung.com Acked-by: Krzysztof Kozlowski <krzk@kernel.org> Acked-by: Chanwoo Choi <cw00.choi@samsung.com> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24clk: qcom: Add display clock controller driver for SC7180Taniya Das3-0/+786
Add support for the display clock controller found on SC7180 based devices. This would allow display drivers to probe and control their clocks. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1573812245-23827-4-git-send-email-tdas@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24dt-bindings: clock: Introduce QCOM sc7180 display clock bindingsTaniya Das2-0/+47
Add device tree bindings for display clock controller for Qualcomm Technology Inc's SC7180 SoCs. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1573812245-23827-3-git-send-email-tdas@codeaurora.org Reviewed-by: Rob Herring <robh@kernel.org> [sboyd@kernel.org: Add sc7180 to subject] Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24dt-bindings: clock: Add YAML schemas for the QCOM DISPCC clock bindingsTaniya Das2-19/+66
The DISPCC clock provider have a bunch of generic properties that are needed in a device tree. Add a YAML schemas for those. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1573812245-23827-2-git-send-email-tdas@codeaurora.org Reviewed-by: Rob Herring <robh@kernel.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org>
2019-12-24clk: qcom: clk-alpha-pll: Add support for Fabia PLL calibrationTaniya Das2-0/+80
In the cases where the PLL is not calibrated the PLL could fail to lock. Add support for prepare ops which would take care of the same. Fabia PLL user/test control registers might required to be configured, so add support for configuring them. Signed-off-by: Taniya Das <tdas@codeaurora.org> Link: https://lkml.kernel.org/r/1573812304-24074-3-git-send-email-tdas@codeaurora.org Signed-off-by: Stephen Boyd <sboyd@kernel.org>
generated by cgit v1.2.3 (git 2.39.0) at 2025-09-27 19:23:08 +0300